Earth journey Research Paper Example | Topics and Well Written Essays - 250 words

Earth journey - Research Paper Example It is also safe to assume that the earth is maintaining these conditions to enable its survival (Lovelock 59). Times are changing and humans are changing for the better. This evolution demands that the earth change also, to ensure its survival, in the long run. The thing I found intriguing about the theory in question is the ability it has to assist scientists find out what needs to be done to salvage the situation. Documented proof that the earth is indeed protecting its existence is available. An example is the research conducted 15-20 years ago Lynn Margulis over the formation of clouds over the ocean. It is through the emission of sulphur molecules as waste material by algae, which later become raindrops through condensation. Cloud formation, in turn, assists the earth maintain its temperature while reducing the heat intensity from the sun (Lovelock 62). I would like to learn more about this theory. This is so that it may assist me in comprehending the benefits of modelling my activities to better suit my immediate environment, and the entire

Critical Assessment of a Book Essay Example | Topics and Well Written Essays - 1500 words

Critical Assessment of a Book - Essay Example Her greatest asset was a keen and observant biological eye which she made use of whenever she worked. Carson’s book ‘Silent Spring’ shot her to fame when it featured at the top of the bestseller lists. She was greatly encouraged by her mother to explore the natural world around her in which Rachel found immense solace. Her books were quite appealing due to their simplicity, style, lyrical value and thoroughness for which she was widely reviewed and honored. She adopted a visionary approach which was quite novel to the mainstream scientific community. Through her writing Rachel Carson handed down to us a legacy of scientific knowledge. She died on April 14th, 1964 at Silverspring, Maryland, USA. Part 2 Outline Structure of the Book   The book Silent Spring, written by Rachel Carson, was first published in the year 1962 and became an instant best seller. Silent Spring was written as a serial article for the magazine, The New Yorker but later was published as a boo k. Carson’s reputation as a writer and scientist helped in establishing the credibility of the book. This book had an enduring and enormous impact on the world. This book was not written for a narrow scientific audience but for the layman and it has been credited with kick starting a debate on the limits of technology, responsibility of science and the use of pesticides. She was of the view that "The best and cheapest controls for vegetation are not chemicals but other plants."  (pg.75) Carson meticulously described the process whereby the entire world food supply chain was contaminated by DDT. DDT entered the food chain and got accumulated in the fatty tissues of man and animal. A single application of the chemical on crops killed not only the targeted insects but also the other organisms present for weeks and months. These chemicals remained toxic even after dilution with rain water thereby causing irrevocable harm to animals and birds. "Carrots absorb more insecticide th an any other crop studied;...In the future it may become necessary to analyze soils for insecticides before planting certain food crops. Otherwise even unsprayed crops may take up enough insecticide merely from the soil to render them unfit for market."  (pg.59) The author implicitly states that these chemicals in the environment caused cancer. The scientist-author meticulously gathered evidence to show the adverse effect caused by the indiscriminate application of mineral based agricultural pesticides and synthetic phosphates and chlorinated hydrocarbons. She argued that not only was the environment being degraded but the very fabric of American natural beauty was being laid threadbare. The indiscriminate use of the chemicals resulted in the development of resistant strains. When they reached high levels of concentration in the water bodies it led to the death of aquatic flora and fauna. â€Å"It is not possible to add pesticides to water anywhere without threatening the purity of water everywhere. Seldom if ever, does nature operate in closed and separate compartments, and she has not done so in distributing the earth’s water supply.†(pg. 42) The efforts of Carson were rewarded when the Government of the United States of America regulated the use of pesticides by enacting the Federal Environmental Pesticide Control Act of 1972. Silent Spring is a book which still holds currency for the debate it still

Effect of Magnetic Field on Hydrodynamic Behavior

Effect of Magnetic Field on Hydrodynamic Behavior Effect of Magnetic Field on hydrodynamic behavior in a Microchannel Heat Sink Mohammad Nasiri 1*, Mohammad Mehdi Rashidi 2, 1 Department Mechanical Engineering, Faculty of Mechanical Engineering, University of Tabriz, Tabriz 5166616471, Iran 2 Department of Civil Engineering, School of Engineering, University of Birmingham, Birmingham, UK. ABSTRACT In this study, hydrodynamic behavior nanofluid (Fe3O4-water) in a MicroChannel Heat Sink (MCHS) with Offset Fan Shaped under magnetic field was numerically investigated. The two phase mixture model was used to simulate the nanofluid flow. Flow was assumed laminar, steady and incompressible. The effects of changing Reynolds number, power magnetic field, and nanoparticle diameter on fluid behavior are considered. The results show that the friction factor decreases and Nusselt number enhances whit rising Reynolds number. Whit increases intensity magnetic field the pressure drop, friction factor and Nusselt number increasing. The results indicate that non-uniform magnetic field has more effect on nanofluid behavior compare uniform magnetic field. Keywords Nanofluid; Microchannel heat sink; Magnetic field; Friction factor; Nusselt number Nomenclature ,z Cartesian coordinate axes Velocity component in x and y and z direction, respectively (m/s) (a,b) Center of magnetic wire (m) Velocity vector (m/s) 0 Velocity inlet (m/s) Acceleration vector (m/s2) Thermal conductivity (W/m K) Specific heat capacity at constant pressure Boltzmann constant (1.3806503ÃÆ'-10-23 J/K) Temperature (K) I Electric intensity (A) H Magnetic field intensity vector (A/m) Heat flux (1 MW/m2) Channel width (300ÃÆ'-10-6m) Hydraulic diameter (0.00001333 m) Channel length (2.70ÃÆ'-10-3m) Drag coefficient Mean velocity (m/s) Drift velocity (m/s) Slip velocity (m/s) d Mean diameter (nm) Nu= Nuselt number friction factor = Reynolds number Prandtlnumber Magnetic field (T) Greek symbols magnetic permeability in vacuum (4à Ã¢â€š ¬ÃƒÆ'-10-7 Tm/A) Dynamic viscosity (kg/m s) Thermal expansion coefficient(thermal expansion coefficient (K-1) Density (kg/m3) Mean free path (17ÃÆ'-10-9 m) Magnetic susceptibility Particle volume fraction Electrical conductivity (s/m) Subscripts Particle Base fluid bw Bottom wall Effective Average Introduction Nanofluids has higher thermal conductivities compared to them base fluids [1-5]. Currently the use of nanofluids in thermal engineering systems such as heat exchangers [6-7], microchannels [8-10] , chillers, medical applications [11,12], and solar collectors [13]. Tsai and Chein[14] investigated analytically nanofluid (water-copper and nanotube)   flow in microchannel heat sink. They was found that optimum values of aspect ratio and nanofluid did not make conversion in MCHS thermal resistance. Kalteh et al. [15] investigated the laminar nanofluid flow in rectangular microchannel heat sink both numerically and experimentally. Compared the experimental and numerical results presented that two-phase Eulerian-Eulerian method results are in better accordance with experimental results than the single-phase modeling. The reasons experimentally   study by Azizi et al.[16] reported that Nusselt numbers decreases whit rising Reynolds number and enhancement heat transfer by using nanoparticles camper to that of pure water for similar Reynolds number. Sheikholeslami et al. [17] studied effect nanoparticle on heat transfer in a cavity square containing a rectangular heated body numerically. They indicated that using nanoparticle increasing he at transfer and dimensionless entropy generation. Micro channel heat sink (MCHS) using in many applications, such as microelectronics and high energy laser. MCHS cooling is very important because heat flux in this channel higher than regular channel. Many studies analyzed the convective heat transfer characteristics of nanofluids in micro channel heat sink in recently many years ago[18-24]. Sakanova et al. [25] investigated effects of wavy channel structure on hydrodynamic behavior in microchannel heat sink. They found that increasing nanoparticles in pure water the effect of wavy wall unnoticeable. Radwan et al. [26] using nanofluid on heat transfer microchannel heat sink in low concentrated photovoltaic systems investigated numerically. They show that nanofluids is effective technique for enhance heat transfer. Tabrizi and Seyf [27] investigated laminar Al2O3-water nanofluid flow in a microchannel heat sink. They showed that increasing volume fraction of Al2O3 and nanoparticle size reducing the entropy generation. Chai et al. [28-30] studied hydrothermal characteristics of laminar flow microchannel heat sink with fan-shaped ribs. Their results presented that used the fan-shaped ribs the average friction factor 1.1-8.28 times larger than the regular microchannel, while used the offset fan-shaped ribs was 1.22-6.27 times increases. Also the microchannel with large ribs height and small ribs spacing, the frictional entropy generation rate increases and thermal entropy generation rate decreases comparing than the smooth microchannel. Magnetic fluid (ferrofluid) is a stable colloidal suspension consisting of a base liquid and magnetic nanoparticles that are coated with a surfactant layer and it can be controlled by external magnetic fields [31]. Sundar et al. [32-33] experimentally studied the heat transfer characteristic of Fe3O4 ferrofluid in a circular tube whit applied magnetic field. They detected that the heat transfer increases compared to water flow at same operating condition. Aminfar et al. [34-36] studied effect different magnetic field on ferrofluid for different channels. They showed that using the uniform and non-uniform transverse magnetic increasing heat transfer coefficient and friction factor. Also shown that non-uniform transverse magnetic enhanced heat transfer more than axial non-uniform magnetic field. In this study, the uniform and non-uniform transverse magnetic effect on heat transfer of ferrofluids flow in a microchannel heat sink with offset fan shaped by using mixture model. The effects of uniform and non-uniform transverse power magnetic fields, Reynolds number and nanoparticle diameter variation are studied in details. Governing Equations Researchers presented different models for numerical analysis in multi-phase flows [37-40]. The mixture model is one of methods for nanofluid analyses [38-41]. In this study, flow is assumed steady state, incompressible and laminar with constant thermo-physical properties. The effects of body forces and dissipation are negligible. Also, for calculate the density variations due to buoyancy force was used the Boussinesq approximation. Considering these assumptions, the dimensional equations define as: Continuity equations: (1) Momentum equations: (2) The term refers to Kelvin force; it results from the electric current flowing through the wire. In this equation, H is Magnetic field intensity vector that determined as [42]: (3) where (4) (5) I is electric intensity. The wire direction is parallel to the longitudinal channel and in the center of cross section at the (a, b). Also, M is the magnetization in Equation (2) and determined as [36]: (6) where is magnetic susceptibility of ferrofluid at 4% volume fraction for different mean diameter is present in Table 1. Table 1. magnetic susceptibility of ferrofluid for different mean diameter mean diameter magnetic susceptibility 10 0.34858668 20 2.7886935 30 9.4118388 In Equation (2), is called Lorentz force that determined as: (7) Where and are respectively effective electrical conductivity and nanofluid velocity vector, also is the induced uniform magnetic field that can be calculated by intensity of magnetic field: (8) Energy equation: (9) Volume fraction equations: (10) In Equation (10), Vm, and Vdr are the mean velocity and the drift velocity, respectively, that be defined as: (11) (12) where à Ã¢â‚¬   is the volume fraction of nanoparticles. The drift velocity depends on the slip velocity. The slip velocity defined as the velocity of base fluid (bf) with respect to velocity of nanoparticles (p) and determined as: (13) (14) The slip velocity is presented by Manninen et al. [31e]: (15) In Equation (15) f drag and r are drag coefficient and acceleration respectively, which can be calculated by: (16) (17) In Equation (16), Rep = Vmdp/veff is the Reynolds number of particles. Nanofluids Properties The physical properties of water and Fe3O4 nano-particles are shown in Table 2. The water-Fe3O4 nanofluidis assumed is homogenous that the thermos-physical mixture properties calculated for 4% volume fraction of nanoparticles. Table 2. Properties of base fluid and nanoparticles [35,40]. Properties Water Fe3O4 Density (kg/m3) 997.1 5200 Specific heat capacity (J/kgà ¢Ã‹â€ Ã¢â€ž ¢K) 4180 670 Thermal conductivity (W/mà ¢Ã‹â€ Ã¢â€ž ¢K) 0.613 6 Electrical conductivity (s/m) 5.3 25,000 Dynamic viscosity (kg/mà ¢Ã‹â€ Ã¢â€ž ¢s) 0.0009963 The physical mixture properties are calculated by means of the following equations: Density of nanofluid: (18) Specific heat capacity of the nanofluid: (19) Dynamic viscosity of nanofluid [43]: (20) Thermal expansion coefficient of nanofluid [35]: (21) Electrical conductivity [36]: . (22) Based on the Brownian motion velocity is Thermal conductivity of nanofluid [44]: (23) dp and dbf are particle diameter(nm) and molecular base fluid (0.2 nm). In Equation (23) Pr and Re are Prandtl and Reynolds number, respectively defined as: (24) (25) Also, in Equation (25) is water mean free path (17 nm) and kB is Boltzmann constant (1.3807 ÃÆ'- 10à ¢Ã‹â€ Ã¢â‚¬â„¢23 J/K). Deà ¯Ã‚ ¬Ã‚ nition of Physical Domain and numerical method Fig.1 shown the geometry of the microchannel heat sink with offset fan-shaped reentrant cavities in sidewall. The channel width and space between a pair cavity is 300 ÃŽÂ ¼m.The channel length is 2.70 mm with a thickness of 350 ÃŽÂ ¼m and the pitch distance of two longitudinal microchannels is 150 ÃŽÂ ¼m. The channel cross section heat sink has a constant width of 100 ÃŽÂ ¼m and constant depth of 200 ÃŽÂ ¼m and   radius of the fan-shaped reentrant cavity is 100 ÃŽÂ ¼m. a) b) c) Fig. 1. a) Geometry of microchannel in the present study b) Cross-sectional plane of transverse non-uniform magnetic field c) Transverse uniform magnetic field In this study, used the finite volume (FV) method to numerically solved non-linear partial differential equations. The velocity pressure coupling by SIMPLEC algorithm. The discretization of momentum and energy equations used the second order upwind scheme and the solid phase equations became discretization by first order scheme. In this study for evaluate of effect the mesh points on the precision of the results, several grid sizes have been tested for the constant heat flux at Re = 300 are given in Table 3. The 1188000 grids is adequately suitable. Table 3. Grid independent test (Re = 200,T0 = 300, 4% vol.). V/V0 T/T0 Grid 1.038 1.027 672914 1.029 1.019 889440 1.023 1.013 1188000 1.02 1.011 1591128 In order to validate this, the amount of mean temperature at the bottom of the microchannel compared by numerical result of Chai et al.[45](Fig.2). Also for comparison effect the magnetic field, the dimensionless velocity under the magnetic field compared by analytical results of Shercliff [46] that shown in Fig. 3 and can be seen a good agreement between results. Figure 2. Comparison of the results for average temperature bottom heat sink Fig.3 Comparison between numerical and analytical results for flow under magnetic field Boundary conditions The set of non-linear elliptical governing equations are solved by using the boundary conditions in the entrance of microchannel (Z = 0), u = 0; v = 0; w = v0 ; T = T0 (26) at the microchannel outlet (Z = 2.7 mm): ; u = 0; v = 0 ;P = Patm (27) In the left and right sides of microchannel outer adiabatic walls (X = 0 w): (28) In the microchannel inner walls: (29) (30) Finally, a constant heat flux condition is imposed at micro heat sink bottom wall (y = 0). Results and discussion The variations of pressure drop and Reynolds number for various transverse magnetic fields are shown in Fig. 3a. It can be seen that for a given fluid, the pressure drop increases by increasing the Reynolds number because rising the velocity inlet. As shown in Fig. 3b whit increases intensity uniform and non-uniform magnetic field in the same Reynolds number (Re=300), the pressure drop increases for non-uniform magnetic because the secondary flow near wall became larger and powerful. Also scale up particle diameter of 10nm to 30nm decreasing pressure drop (Fig. 3c). a) b) c) Fig. 3. Effects of various a) Reynolds number [H=6ÃÆ'-106, dp=30nm] b) power magnetic field gradients [Re=300, dp=30nm] c) particle diameter [H=8ÃÆ'-106, Re=300] on the pressure drop Fig. 4 presented streamlines for various magnetic fields at 0.0015à ¢Ã¢â‚¬ °Ã‚ ¤ Z à ¢Ã¢â‚¬ °Ã‚ ¤0.002. As shown in Fig.4, when magnetic field is weak the streamlines same together because the magnetic field had not enough powerful for veer stream. By increases intensity magnetic field the nanofluid flow shift to near wall and thereupon the vortex in reentrant cavities became powerful Fig.5. Fig. 4. Stream lines in same Reynolds number (Re=300) and particle diameter [dp= 30nm] for a) non-magnetic field b) non-uniform magnetic field (H=6ÃÆ'-106 A/m) c) uniform magnetic field (H=6ÃÆ'-106 A/m) Fig. 5. Stream lines in same Reynolds number (Re=300) and particle diameter [dp= 30nm] for non-uniform magnetic field a) H= 6ÃÆ'-106 A/m c) H=8ÃÆ'-106 A/m The friction factor decreases as Reynolds number increases (Fig. 6a). The magnetic field cannot overcome viscous force and affect mean velocity when intensity magnetic field is low, therefor the friction factor is almost fixed for using magnetic and non-magnetic field. Whit increases intensity magnetic field the mean velocity decreases and while the pressure drop increases (Fig. 3.b); therefore, the friction factor increases at maximum intensity field (Fig. 6b). Also scale up particle diameter the main velocity and pressure drop decreases. The uniform transverse magnetic field is depended to velocity that whit decreasing velocity the uniform transverse effect decreases on flow, so friction factor rising (Fig. 6c). a) b) c) Fig. 6. Effects of various a) Reynolds number [H=6ÃÆ'-106, dp=30nm] b) power magnetic field gradients [Re=300, dp=30nm] c) particle diameter [H=8ÃÆ'-106, Re=300] on the friction factor Figure 7 shows the variations of average temperature bottom heat sink for different condition. Whit increasing Reynolds numbers the velocity increasing too and the vortex in reentrant cavities became bigger and powerful, thus average temperature bottom heat sink decreases (Fig. 7a). Effects of various power magnetic field gradients [Re=300, dp=30nm] on average temperature bottom heat sink presented in Fig. 7b. When the intensity magnetic field is weak cannot affect average velocity because cannot overcome viscous force. By strengthening the non-uniform transverse magnetic field the average velocity became larger and growth vortex in channel, therefore average temperature bottom heat sink reduces. Particle diameter rising, the non-uniform transverse magnetic had more effect than uniform transverse magnetic and non-magnetic on average temperature bottom heat sink (Fig. 7c). Whit scale up particle diameter decreasing thermal conductivity and heat transfer for when applied uniform transv erse magnetic because it independent of particle diameter. Figure 8 presented the variations of average Nusselt number for different condition. Nusselt number enhances with Reynolds number in

The Effects of Motivation on Performance Essay examples -- Andrew and

The Effects of Motivation on Performance Findings Task 2- Write a Report on the effects of Motivation on Performance Research people’s attitude to work and factors affecting their motivation by constructing a questionnaire and conducting a small survey. You should aim to distribute your questionnaire to at least 5 people within your organisation. Gather information on what motivates individual performance and identify attitudes to work by interviewing an employee in-depth and comparing their attitudes with your own. Relate you findings to motivation theories and provide a description of the motivators appropriate for different types of individual performance. Andrew and Robertson: An Introduction to the Business Objectives Andrew and Robertson have started put life as property mangers in 1887. Managing properties on behalf of owners. Southwark Council also contracted out housing management for a trial period in the 90’s in which Andrew and Robertson’s partly participated. In the 1960’s Andrew and Robertson expanded into auctioneering. The object of this section of the business aims to sell houses at auctions 4 times a year. However 1980 prior they only had two actions a year. The business aims to make a profit for the four senor partners. The business has no obvious intentions to float on the stock market. The partnership has currently invested in a new phone system and computer network for one of its three branches. This according to an associate partner is the partnership attempting to modernise the old fashion approach to the business currently used by managers. Serves Andrew and Robertson’s serve the clients who own the properties, which they manage. The management also serve their auctioneering arm that sells properties for the clients of the property-managing arm who wish to sell their properties. Motivational Procedures Andrew and Robertson’s have no written procedures however there are a number of unwritten procedures, which are used. These procedures include: Staff/Management association (This is not like by a small minority of staff  ¼) Close quarters arrangements (Putting desks in close proximity for communication means) Appraisal Meetings (Token) Staff Management association This is the system in which higher level management work along side their employers. In the hope that the bond between the low... ...people work so hard and Physiological needs Basic needs such as food water and shelter are all met because the pay is reasonable at the firm of Andrew and Robertson’s. Food and drink is also supplied in small quantities at break times. The management sees these as incentives because in the afternoons the employees generally work harder. So therefore the reason for higher efficiently in the afternoons is the cakes and tea, which are available at lunch times and corresponds to the Physiological needs on Abraham Maslow’s Hierarchy of needs William Bridges IT Evolution William Bridges wrote that there have been many changes in the modern working environment. Including the number of jobs in an organisation deceasing or increasing during fluctuating periods of demand. He argument being the advancement of IT had increased competition and therefore the nature of management philosophy. This is truer at Andrew and Robertson’s since the number of employees aged over 40 years has dropped tremendously over the last 3 years due to the need for IT compliant staff. Since it is the partners who dictate policy their behaviour and types of behaviour towards their management policy.

Powering Indian Telecom Towers Environmental Sciences Essay

Solar energy has proven to be a dependable and economical method of powering telecommunication systems in topographic points where conventional electricity is unavailable or impractical. It provides an first-class beginning of clean, dependable power to maintain un-interrupted power supply to telecom towers. This paper contains a brief description of Indian telecom towers and photovoltaic ( PV ) cells used in telecommunication systems. Because solar energy systems are robust and cost effectual, the demand for solar power in telecommunications will go on to turn. Key Words-insolation, irradiance, photovoltaic, solar cell, solar energyIntroductionIndia is now in the 2nd largest of the Global telecom markets and is projected to get the better of China. Our state presently has about 400,000 telecom towers around the land and poised to increase to 450,000 towers over the following 2 old ages ( 2 ) . A big part of these towers is non connected to the electricity grid or does non hold entree to dependable electricity connoting they have to put in backup power systems in order to run without breaks. Diesel Generators have been the pick of telecom operators despite their high C imprint. Telecom Towers are estimation to fire 2 Billion Liters of Diesel ( around 500 million barrels ) yearly at a cost of 10000 crores. On an norm, about 260,000 is being spent yearly to carry through the Diesel demands of a individual telecom tower. These high input costs besides result in high pollution. While the authorities has been seeking to change over these towers t o renewable energy signifiers, most of the tower operators have been really slow to implement this alteration. The renewable energy ministry had asked telecom companies to cut down their dependence on conventional fuels and see options for partially powering telecom towers. While some tower Godheads are looking at tight natural gas and piped natural gas to power towers, Indus Towers, the largest with over 1 lakh towers in India, planned to put up 2,500 solar towers by terminal of this twelvemonth. Viom Networks, which operates more than 38,000 towers across India, plans to run more than one-quarter of this figure on alternate energy within the following two old ages. It plans to run 2,000 towers on solar power entirely by 2013. For the GSM Technology, it requires an norm of 6 BTS to run one tower. Each shelter has two ( 1.5 ton ) air conditioners for the cardinal care of the temperature for the shelter ‘s electronic systems. The DG set is typically 15 kVA capacity, which consu mes an norm of 3 liters of Diesel per hr [ 4 ] . Each tower requires energy from 1000 W to 3000 W ( older installing consumes more power as comparison to new one because of technological promotion ) . Each 1000 W consequences in the 22 tonnes/hr of emanation of CO2 if running on the province electricity and in instance of the gensets this figure is many times more. Assuming mean power ingestion of each tower is 1200 W so entire CO2 emanation is 105.6 lakh metric ton per hr by all these towers if we assume that all are running on province electricity. In India about 70 % telecom towers are in rural countries. Soon 40 % power demands are met by grid electricity and 60 % by Diesel generators [ 2 ] . The Diesel generators are of 10-15 KVA capacity and devour about 3 litres of Diesel per hr and bring forth 2.63 kilogram of CO2 per litre. For every kWh of grid electricity consumed, 0.84 Kg of CO2 is emitted. Entire CO2 emanation is around 5 million tones of CO2 due to diesel ingestion and around 8 million dozenss due to power grid per an num. The move from Diesel to solar and other alternate beginnings of energy will ensue in a decrease of 5 million dozenss of CO2 emanations every bit good as a nest eggs of immense sum in operating disbursals for telecom tower companies. Move to renewable energy beginnings can bring forth 1000000s of C credits that could countervail the opex on their towers. Therefore by replacing diesel generators with solar panels in cell phone towers, more than 5 million dozenss of C emanations could be prevented from come ining the ambiance and cut down the opex of telecom towers. India has approximately 500 million nomadic phone endorsers, more than even the population of any state except China India is expected to hold one billion mobile phone endorsers by 2015 which would intend about 250,000 more Mobile towers which, in bend, would duplicate the C emanations. Even if the solar panels supply a portion of the entire power required, it would still salvage significant sums of money, fuel and C e manations.Electricity Generation Through Solar CellsIn India the one-year solar radiation is about 5 kWh/ sq thousand per twenty-four hours with about 1500-2000 sun-shine hours per twelvemonth. Solar radiations represent the Earth ‘s most abundant energy beginning. The perennial beginning of solar energy provides limitless supply, has no negative impact on the environment. The solar photovoltaic ( PV ) modules convert solar radiation from the Sun into electrical energy in the signifier of direct current ( DC ) . Converting solar energy into electricity is the reply to the mounting power jobs in telecom towers peculiarly in the rural countries. PV or solar cells are semiconductor devices that convert sunlight into direct current electricity ( Fig.1 ) . When light photons of sufficient energy work stoppage a solar cell, they knock negatrons free in the silicon crystal construction, coercing them through an external circuit and so returning them to the other side of the solar cel l to get down the procedure all over once more. Fig. 1. ( a ) photovoltaic consequence ( B ) how a PV cell plants ( degree Celsius ) a crystalline Si panel The electromotive force end product from a individual crystalline solar cell is about 0.5 V with an amperage end product that is straight relative to the cell ‘s surface country ( about 7 amperes for a 6-inch-square multi crystalline solar cell ) . Typically, 30 to 36 cells are wired in series ( + to – ) in each solar faculty. This produces a solar faculty with a 12-volt nominal end product ( ~17 Vs at peak power ) that can so be wired in series and/or parallel with other solar faculties to organize a complete solar array. Solar cells used in telecom towers are shown in Fig 2. Solar cell is cosmopolitan and will work virtually anyplace ; nevertheless, some locations are evidently more suited than others. Irradiance is a step of the Sun ‘s power available at the Earth ‘s surface, with power peaking at about 1,000 Wattss per square metre ( W/m2 ) . With typical crystalline solar cell efficiencies about 14 to 16 per centum, approximately 140 to 160 Wattss can be generated per square metre of solar cells placed in full Sun. Insolation, which is a step of the available energy from the Sun, is expressed in footings of â€Å" full Sun hours † ( i.e. , 4 full Sun hours = 4 hours of sunshine at an irradiance degree of 1,000 W/m2 ) [ 1 ] . Fig.2 Solar cells used in telecom tower for United Nations interrupted power supply.Tele DensityTelephone introduced in India in 1882. The entire figure of telephones in the state stands at 885.99 million, while the overall tele-density has increased to 73.97 % and the entire Numberss of nomadic phone endorsers have reached 851.70 million as of June 2011. Himachal Pradesh has become the first province in India to accomplish 100 per cent tele-density. The province has about seven million nomadic clients [ 5 ] . The province population is 6.8 million as per the Census 2011 much lower than the nomadic subscriber population of seven million. While the urban tele denseness reached 150.67 per cent, the rural tele denseness reached 32.11per cent. Experts have pointed out that the grounds for this rapid growing are lowest call rates, big market base due to bigger population, well ample untapped market and robust economic growing of the state. In add-on factors like rapid technological accept ance, better service criterions, advanced merchandise offerings and competitory pricing amongst the service suppliers has besides contributed in a major manner to increase the tele-density of the state.Energy Management in Telecom TowersA Telecom tower enables telecom operators to supply web connexion to mobile users. Fig. 3 Standard Telecom System Telecom being an indispensable service requires the web to be ever available. In order to accomplish this, the tower substructure that has 2 operators uses 6-8 kilowatt ( avg. ) of electricity per hr ( Fig.3 ) . Energy demands of a telecom tower in India are presently met through: Electricity Mains Diesel Generator and UPS / Battery RacksDiesel Consumption in Telecom Towers and Environmental PollutionThe telecom operator spends 3 billion ( USD 67.42 million ) every month towards running Diesel generators in distant locations where grid base power is limited. This translates to an operational energy disbursal of around 65 billion yearly to run web towers, particularly in off-grid locations ( 4 ) . Since, Electricity supply is fickle and is non available through out the twenty-four hours in many parts, Diesel Generators ( DG ) are used to power the telecom web, as a dorsum up for power supply. DG ‘s are operational for 15-20 hours ( avg. ) in rural countries and 3- 7 hours in urban countries ( Table 1 ) seting a emphasis on the environment by manner of C emanations and noise pollution One liter of Diesel emits 2.63 kilogram of CO2 emanations. Hence telecom webs contribute to carbon emanations and planetary heating. Table 1 Power Availability at Tower SitesGrid Power Availability Cell Sites10 % : & gt ; 20 hour Chiefly metro metropoliss of Mumbai, Kolkota, Chennai, some metropoliss of Gujarat, State of Chattisgarh, some metropoliss of Punjab 20 % : 16-20 hour Covers most other major metropoliss and towns in the remainder of the state 30 % : 12-16 hour All semi-urban and little urban towns in all provinces 25 % : 8-12 hour Mostly rural countries 15 % : & lt ; 8 hour Mostly parts of Bihar and some towns of Assam, NE provinces, UP and J & A ; K The Power Problem A speedy analysis of telecom web runing costs indicates power and fuel are the primary operating costs, consisting over 30 % of entire operating cost. This is because grid power ( Electricity Board or EB power ) is extremely undependable and in a batch of instances, non available in rural countries. BTS sites require changeless and uninterrupted power for the safe operation of the web. As a consequence, BTS sites have utilized onsite Diesel generators to either supply backup or primary power in the absence of EB power. Uninterrupted operation is achieved through a battery bank. The typical constellation of DG sets is 10-15 KVA with a fuel burn rate of 2-3 liters per hr ( depending on full or half load operations ) . Assuming seven hours of DG operations in urban countries and 20 hours in rural countries, estimated use of Diesel fuel is 2-4 billion liters per twelvemonth across the 400,000 towers in India. Fuel demand is increasing with each new tower. India, with its first-class irra diance, has the chance to work Photovoltaic ( PV ) solar power to run into this challenge of onsite power coevals. Coupled with a battery backup, PV systems are a feasible and exciting option to cut down the power cost and entire operating outgo ( OPEX ) , thereby supplying a sustainable and dependable strategic solution to the fuel job. The operating cost of Diesel and solar PV system is shown in Table-2 which shows that solar PV system is economical ( 14.08/kWh ) than Diesel DG sets ( 16.19/kWh ) and besides eco friendly and can market their C recognition to cut down farther the opex of the telecom tower. Table 2. Comparative analysis of solar PV and diesel generators ( DG ) uses in telecom tower.Strictly DG setsStrictly PV systemAnnual ingestion of 15 kVA DG sets @ 3 litres/h, liters 26280 Assumed capacity, Wp 15000 4 % shut down period i.e.for 96 % operation, liters 25229 Annual sunshine hours 1650 kWh produce @ 3.5 kWh/litre 88301.5 10 twelvemonth output, kWp 247500 Diesel cost @ 42/litre, 1059618 Capital investing @ 200/Wp, 30,00,000 Cost of machine etc, 300000 Operating cost, ( including depreciation, involvement, care ) , /10 old ages 49,80,000 Operating cost ( including depreciation, involvement, housing/rent, care ) , /year 1429918 Operating cost/kWh, 16.19 Operating cost/kWh, 20.12 After 30 % subsidy 14.08 Telecommunication Companies and Their Role ECIndia has the fastest turning telecom web in the universe with its high population and development potency. India ‘s public sector telecom company BSNL ( 11.41 % ) is the seventh largest telecom company in universe. The entry of new participants into the telecom industry has made competition intense, in peculiar over the last four old ages. The dominant participants in the market presently include Bharti-Airtel ( 20.09 per cent of the Indian market ) , Reliance Communications ( 16.70 % ) , Vodafone ( 16.54 % ) , Tata Tele Services ( 11.08 % ) , Idea ( 10.97 % ) and Aircel ( 6.76 % ) ( Table 3 ) . Table 3. Share of telecom companies in Indian market and stairss taken to utilize renewables Companies Market portion, % Stairss taken for usage Renewable energy in teletowers Bharati Airtel 20.09 Targeted for solarizing 2000 towers by 2010-11. No latest information on accomplishment. Reliance Communication 16.70 Stairss taken to utilize renewable to cut down opex by 50-60 % Vodafone 16.54 23 % of its planetary operation by renewables BSNL 11.41 Taken pilot undertakings under Jawharlal Nehru Solar Mission for solarizing towers. Tata Teleservices Ltd 11.08 Deployed 31 cell sites powered by solar power and fuel cells. Idea Cellular 10.97 Solar-DG loanblend in some nomadic towers Aircel 6.76 No information available Stel 0.34 Cringle 0.39 Eti Salat 0.08 HFCL 0.18 Uninor 2.73 Videcon 0.83 MTNL 0.69 Siestema 1.21 Beginning: Telephone Regulatory Authority of India ( as on 28th Feb, 2011 ) As per the directives of Ministry of New and Renewable Energy, some companies have taken inaugural stairss to utilize renewable energy beginnings to power their telecom towers. Some major are: Bharti Infratel has set a mark of deploying 2000 renewable energy sites by the fiscal twelvemonth 2010-11. The undertaking is besides expected to ensue in an estimated decrease of 58,170 metric tons of CO2 emanations per twelvemonth. BSNL has taken up pilot undertakings for 10 kilowatts solar workss at 14 sites and Wind power undertaking at 6 USO funded sites in Rajasthan, Gujarat, Tamil Nadu, Karnataka and Maharashtra. Indus Towers, the largest with over 1 lakh towers in India, will put up 2,500 solar towers by September this twelvemonth. Viom Networks, which operates more than 38,000 towers across India, plans to run more than one-quarter of this figure on alternate energy within the following two old ages. It plans to run 2,000 towers on solar power entirely by 2013. There are around 5,60,276 Base Transceiver Stations ( BTS ) in the state. It may be noted that BTS is different from towers as one tower may hold more than one BTS. In India the tower companies portion the tower sites with all telecom operators. While the tower is erected by the tower substructure companies, the BTS is installed by the telecom operators. A nomadic tower is an aerial where electronic communications equipment are placed on a wireless mast or tower to make a cell in a cellular web. A nomadic tower is composed of a tower or other elevated construction for mounting aerial and one or more sets of transmitter/receivers transceivers, digital signal processors, control electronics, a GPS receiving system, regular and backup electrical power beginnings, and sheltering. Circle wise interruption up of BTS is given below [ 3 ] . Metro DelhiA A A A A A A A A A A A A A A A A A A A A A A A A A 20,715 MumbaiA A A A A A A A A A A A A A A A A A A A A A 21,038 KolkottaA A A A A A A A A A A A A A A A A A A A A 14,018 TotalA A A A A A A A A A A A A A A A A A A A A A A A A A 55,771 A Circles MaharashtraA A A A A A A A A A A A A A A 42,998 GujaratA A A A A A A A A A A A A A A A A A A A A A A 31,852 Andhra PradeshA A A A A A A A A A A 43,661 KarnatakaA A A A A A A A A A A A A A A A A A 39,093 Tamil NaduA A A A A A A A A A A A A A A A 52,075 TotalA A A A A A A A A A A A A A A A A A A A A A A 2,09,679 Fig 4. A roof top Mobile tower in Bhubaneswar utilizing intercrossed grid-DGB Circles KeralaA A A A A A A A A A A A A A A A A A A A A A A A 27.156 Fig.3 A BTS system PunjabA A A A A A A A A A A A A A A A A A A A A A A A 19,575 HaryanaA A A A A A A A A A A A A A A A A A A A A 13,883 UPA A A A A A A A A A A A A A A A A A A A A A A A A A A A A 68,487 RajasthanA A A A A A A A A A A A A A A A A A A 28,694 Madhya PradeshA A A A A A A A A A A 31,665 West BengalA A A A A A A A A A A A A A A 24,532 TotalA A A A A A A A A A A A A A A A A A A A A A A 2,13,992 C Circles Himachal PradeshA A A A A A A A A 5,425 BiharA A A A A A A A A A A A A A A A A A A A A A A A A A 35,086 OrissaA A A A A A A A A A A A A A A A A A A A A A A A 18,095 AssamA A A A A A A A A A A A A A A A A A A A A A A A A 9,610 North EastA A A A A A A A A A A A A A A A A A A 5,490 Jammu & A ; KashmirA A A A A A A A 7,128 TotalA A A A A A A A A A A A A A A A A A A A A A A A A A 80,834 Grand TotalA A A A A A A A A A A A A A 560,276DecisionTo cut down CO2 emanation and planetary heating due to telecom towers, Govt. should do it compulsory to telecom companies to utilize renewable energy.Govt. should halt subsidy on Diesel for telecom companies. More inducements should be given to those who use renewable energy for their towers.

Fossil Fuels – discovery, utilisation and future

As industry developed and increased, as did the need for reliable and efficient fuels to power the new machinery developed. It did not take long before fossil fuels were discovered, with their innate ability to provide high amounts of energy at seemingly low costs. Fossil fuels are found deposited in rock formations. They were formed between 350 million and 50 million years ago, and so, although are technically renewable, it would take this long to remake them, which does not really help us today, it is due to the fact we need this long to make them that they are considered nonrenewable, and therefore will at some point run out. The processes by which they formed are not totally understood, other than that sediments buried decayed remains of ancient plants and/or animals. This is then effectively baked over millions of years under conditions of very high temperature and pressure, creating coal, oil, and natural gas, which consist of roughly 90% carbon Fossil fuels are used widely in all forms of industry, in fact, coal, petroleum and gas provides over 90% of the energy used in most industrialized countries, compared with just 9% which hydroelectricity and nuclear power provide together. You can read also Waves When looking at the properties of a good fuel, it is easy to see why fossil fuels are used: * A fuel should react with an oxidiser to release large amounts of energy – carbon based fuels release over 30000 kJ per kilogram * A fuel must be oxidised fairly easily, ignite quickly and sustain burning without further intervention – gaseous or easily vaporized fuels (such as oil) usually perform well here as the mix easily and continuously with oxygen which speeds up the reaction. Coal is often crushed to form small powders to make it ignite easier, however it is evident from steam the reliability of steam trains that carbon is easily burnt. * A fuel should be readily available, in large quantities and at a reasonable price – initially this could be said to be true about fossil fuels, but now, as people become more aware of their cons, and of other fuels' pros, they are becoming more expensive and less available. Still, the price of oil is so heavily depended upon by the economy, that even the slight fluctuation in price can cause a country to go to war or a government to fall. * A fuel should not burn to give products that are difficult to dispose of, unpleasant or harmful – fossil fuels definitely do not fall under this category, but the only fuel that does fall under this category is hydrogen. * A fuel should be convenient to store and transport safely and with out loss – fossil fuels are the only type of fuel that people are currently comfortable with storing, hydrogen and methane are so flammable that people get nervous about using them for cars, and until a safe way of storing them is developed, fossil fuels will have to continue to be used You may then wonder what the problem with fossil fuels is as they are obviously good at their job. What we must consider is the fact that they are non-renewable, and that we are consuming them at an incredible rate. It is predicted that most of the Earth's oil sources will be depleted over the century. Also, fossil fuels are used in many important chemical industries, such as making plastics, medicines, and solvents, and by burning them, we are decreasing our the feedstock for these vital products. Fossil fuels such as oil are made into these products through a series of different processes. First the oil is fractionally distilled then the different sections join together to make polymers. These synthetic plastics and solvents are used largely in everyday life, such as polystyrene cups and PVC plastic. Secondly, the burning of carbon based fuels produces large amounts of carbon dioxide that is one of the main contributors to the â€Å"greenhouse effect†. There are such drastically high levels of carbon dioxide in the air that the only real solution would be to ban all use of fossil fuels, but countries have become so dependant upon them that is not feasible. Thirdly, spillages of fossil fuels cause serious damages to local environments. When an oil tanker crashes, immense amounts of sea life and birds die, and the effects are disastrous. Fourthly, inefficient burning of fossil fuels results in the production of carbon monoxide, which is a very harmful and poisonous gas. Inhalation of this gas is likely to cause death as it interferes with the transport of oxygen in the blood stream. Fifthly, combustion of fossil fuels also produces gases such as nitrogen oxides, which cause acid rain. In particular we can look at oil. Numerous countries' entire economies now rely on the price of oil, as their entire wealth is in the drilling, extracting, and trading in it. This is cause for great concern as oil is non-renewable, and we are consuming it so quickly, it will inevitably run out, and counties will no longer be able to rely on it. We have seen in the past that countries' entire economies' have collapsed due to minor fluctuations in the oil market, therefore total collapse of the market would be devastating for many of the world's major and influential countries. Also, there would be immense amounts of job losses that would inevitably affect the society; this can be seen by looking at the destruction caused when the coalmines closed. There are few ways which can be seen to overcome this imminent problem, however, one, most likely solution would be to investigate alternatives to fossil fuels, but all of the possible alternatives have their advantages and disadvantages which must be taken into account before making any changes. * Biofuels (plants can be grown specifically for fuel or the production of fuel, such as wood or sugar cane. Biogas and biomass created by the growing and decaying of plants already produce usable fuel so this could easily be exploited to create a fuel source.) Advantages – renewable, reduces waste, simple technology. Disadvantages – not a large enough supply to totally replace fossil fuels * Methanol CH3OH (this is a simple alcohol which can be made from methane.) Advantages – burns cleanly and completely Disadvantages – more toxic than ethanol, provides less energy per litre than petrol, can cause corrosion of car engines. * Nuclear fission (energy is released when the nuclei of atoms of isotopes of uranium U-35 are split. The energy created can be used to heat water to turn steam turbines.) Advantages – no carbon, sulphur, or nitrogen oxides produces. Disadvantages – radioactive waste, safety systems needed are very expensive. * Nuclear fusion (energy is released when deuterium and tritium â€Å"fuse† to create helium) Advantages – potentially almost limitless as an energy supply as the reactants come from water. Disadvantages – very costly, cannot currently be produced at economic rates. * Moving air (wind turns windmills and wind turbines. Lots of research is already being carried out and soon may provide 10% of the UK's energy) Advantages – renewable, pollution and waste free, can be used in locality to where the energy is needed. Disadvantages – high initial expense, not reliable in calm weather, noise and visual environmental impact * Moving water (Hydroelectricity – water stored behind dams can be released through turbines to generate electricity. Waves – The motion of waves is used to create oscillating motion. Tides – incoming tides in river estuaries fill up large water stores behind barrages, which is then released through turbines.) Advantages – renewable, predictable, pollution and waste free, large scale. Disadvantages – costly to install, environmental impact. * Sunlight (Solar panels – collect solar heat and are used to heat water. Photovoltaic cells – convert light into electricity). Advantages – renewable, pollution and waste free. Disadvantages – Not good for places of low sunlight levels, high initial costs, not very practical for large-scale use. * Geothermal energy (heat from rocks under the Earth's surface can be used to heat water which can, in turn, be used to heat houses). Advantages – practically unlimited. Disadvantages – not widely available, large initial costs * Hydrogen (extracted from water by electrolysis, many things are capable of running on hydrogen). Advantages – no pollution. Disadvantages – people are nervous about using such a dangerously explosive gas, difficult to store and transport. If some of these possibilities were researched further, they could replace fossil fuels and help many of the previously discussed issues.

Free Essays on Effect Of Heredity And Environment

Effects of Heredity and Environment on individual Differences Most psychologists acknowledge that both heredity and environment are influential; the argument is over which factor is predominant The nature-nurture issue first became a controversy in the 1920's and the 1930's. Some psychologists felt that heredity was the primary, if not the sole, factor in the development of an individual. Others felt environment was the critical determining factor. As we saw in Unit One, this controversy is still unresolved. Still, most psychologists agree that some degree of interaction between heredity (nature) and environment (nurture) determines both physical and psychological development. In this module we will consider the relation of both factors to intelligence and behavior disorder. As you read the text, consider the following questions. Has heredity or environment made the greater contribution to your development? Are there any upper or lower limits of intellectual achievement? What research methods are used in heredity-environment studies? The interaction between heredity and environment can be studied by investigating families and persons who are related in various ways. Hereditary similarity is relatively well understood. A parent and child, for example, have 50% of their genes in common, but among siblings this may vary from 0 to 100% due to the random distribution of chromosomes. Identical twins have the same heredity; 100% of their chromosomes are alike. Environmental differences cannot be stated in such concrete terms. No two persons experience an identical environment. Very similar environments are usually experienced by same-sexed twins, whether identical or fraternal. Different-sexed twins, siblings, and parents all experience somewhat different environments, although these environments may be superficially similar. Occasionally, identical twins are reared apart. Then we have two people with identical here... Free Essays on Effect Of Heredity And Environment Free Essays on Effect Of Heredity And Environment Effects of Heredity and Environment on individual Differences Most psychologists acknowledge that both heredity and environment are influential; the argument is over which factor is predominant The nature-nurture issue first became a controversy in the 1920's and the 1930's. Some psychologists felt that heredity was the primary, if not the sole, factor in the development of an individual. Others felt environment was the critical determining factor. As we saw in Unit One, this controversy is still unresolved. Still, most psychologists agree that some degree of interaction between heredity (nature) and environment (nurture) determines both physical and psychological development. In this module we will consider the relation of both factors to intelligence and behavior disorder. As you read the text, consider the following questions. Has heredity or environment made the greater contribution to your development? Are there any upper or lower limits of intellectual achievement? What research methods are used in heredity-environment studies? The interaction between heredity and environment can be studied by investigating families and persons who are related in various ways. Hereditary similarity is relatively well understood. A parent and child, for example, have 50% of their genes in common, but among siblings this may vary from 0 to 100% due to the random distribution of chromosomes. Identical twins have the same heredity; 100% of their chromosomes are alike. Environmental differences cannot be stated in such concrete terms. No two persons experience an identical environment. Very similar environments are usually experienced by same-sexed twins, whether identical or fraternal. Different-sexed twins, siblings, and parents all experience somewhat different environments, although these environments may be superficially similar. Occasionally, identical twins are reared apart. Then we have two people with identical here...

Greek Achievement essays

Greek Achievement essays When discussing ancient civilizations, one of the most prominent has to be the Greek civilization. Under the rule of various rulers, Greece saw a change from a pagan worshiping society that was almost abolished, to an enduring civilization that strived on philosophy, and intellectual thought. As the Greeks dispensed the gods in political life, they based government on human intelligence. The evolution of the Greek polis, or city-state, from a tribal-religious institution to a secular rational institution, that is regarded as one of the greatest in the history of mankind, was only a part of the general transition of the Greek mind from myth to reason. What separated the Greeks from other Near Eastern civilizations, as well as gave it enduring significance, was the Greeks gradual realization that political problems are caused by man and require earthly solutions. The Greeks also had a strong belief in their system of the city-state but it eventually would contribute to their demise. These city-states allowed for much separation within their political life, and thus was the cause for much suffering. Greece would endure two major wars, which would shape their civilization, and have a lasting effect. First was the Persian Wars with Sparta. Because Sparta was a walled city, and couldnt compete with the Athenian culture, Athens eventually triumphed. One of the most fascinating contrasts in this war is how different the two city-states could be. Athens was located on the peninsula of Attica, near the coast, possessed a great navy, and was a commercial leader for the Greeks. Sparta was a land power and was exclusively agricultur al. Spartas leaders pursued an isolationist foreign policy, and believed in keeping their freedom on the homeland. The Athenians had such things as democracy, and extended their hegemony over the Greeks. Unfortunately, after the long battles between Athens and Sparta were finally laid ...

Baroque vs. Classical Music Essay

When many people listen to music from earlier periods, they classify it all as classical music, when although there were many periods of music. Although the two may sound similar to the untrained ear, the Baroque style and the Classical styles of music have many differences. The Baroque Period (1600-1750) was a revolutionary period for music. Preceded by the renaissance, the Baroque Period offered new and different things to music. Common tools were used such as counterpoint and fugue that transformed music.There was a growth in the uses of new Instruments such as the trumpet, French horn, and piano. Composers, such as Johan Sebastian Bach, concentrated on what the music notes lead to and what sounded good to listen to. Bach, who composed over 1200 pieces, was the gold standard for Baroque music, helping to regulate harmony In music. Baroque music was all about emotion. Composers used these tools to weave and blend different sounds together to create unison. Counterpoint NAS a popular tool used, where two separate lines were played together to make harmony. A lot went on in Baroque music. The Classical Period (1750-1825), on the other hand was a lot simpler. Instead of having many instruments playing lines at once in harmony, many instruments would play softly in the background while a solo instrument would play. Classical music consisted of a single melody. Baroque music was very complex, and demonstrated polyphony, where many different sounds went on at the same time, whereas Classical music demonstrated homophony, where the same sounds were played. Form was also a big factor in Classical music.Baroque composers were more concerned about Viking emotion than the form of their piece; Classical composers were the opposite Classical composers demonstrated clear cut form, whereas Baroque composers blended everything together. Classical music was also very repetitive. Composers Would not change much, it was the same melody played over and over. I prefer Baroque music over Classical music. I chose Baroque music because it is a lot more interesting. Classical music is too simple compared to Baroque music. With Baroque music, more emotion is evoked. A great example of this is Vivaldi The FourSeasons where you could actually tell which season Is portrayed by which piece by listening carefully. To me, Classical music Is too boring and repetitive. Baroque music always keeps me on my toes, keeping me guessing at what Is coming next. I care more about what a piece means than the form It Is written In. Although I prefer Baroque music, I do not discredit Classical music at all. A lot of brilliant pieces came from both periods of music. Ay ignominious There was a growth in the uses of new instruments such as the trumpet, French harmony in music. Baroque music was all about emotion. Composers used these Nas a popular tool used, where two separate lines were played together to make The Classical Period (175()-1825), on the other hand was a lot simpler. Instead of Mould not change much, it was the same melody played over and over. Seasons where you could actually tell which season is portrayed by which piece by listening carefully. To me, Classical music is too boring and repetitive. Baroque music always keeps me on my toes, keeping me guessing at what is coming next. I care more about what a piece means than the form it is written in.

Cost Report for the Average Physical Education teachers Salary Essay

Cost Report for the Average Physical Education teachers Salary - Essay Example Teacher salary follows a strict clustering system, which ensures that every teacher receives a pay commensurate to his or her duties. The cost of an average teacher in the state of Georgia is $ 74,985.07; this is the sum of a basic teacher salary and a number of other benefits, which make the career more attractive. The American government has a set minimum wage for every employee in the country, a feature that protects every citizen from exploitation by employers. The minimum wage in the state of Georgia is $ 20,000 implying that teacher salary is above the minimum wage and therefore conscious of the economic factors in the country. Among the common benefits that teachers enjoy are health insurance, medical insurance, social security, and workman’s compensation insurance. These benefits also vary depending on the nature of a teacher’s responsibilities in the school. The United States of America is a developed country and the government strives to provide the basic life support features in every region thereby dispelling the need for hardship allowances. The table below breaks down the teacher salaries in the state of Georgia: Average teacher cost Pay schedule $ 52,852.32 Local supplement $ 4,447.68 Health insurance $ 10,619.98 FICA $ 830.85 TRS $ 5,890.44 Total teacher salary $ 74,985.07 The additional costs such as the health insurance and the social security contribution all apply in form of uniform percentages of the scheduled pay. This implies that a teacher with a higher basic salary receives larger additional benefits thus validating the salary disparities among the teachers. The salary tabulation above refers to that of an average teacher in the state of Georgia and is therefore applicable to the physical education teacher at Alcovy High School, which is in the Newton county school management system. This therefore exempts Alcovy High School from paying its teachers the social security’s benefits. This way, after paying the teacher their basic remuneration of $52,852.23, the school will further pay the teachers an additional $17,685.07 in benefits thus resulting in a total of $74,985.07, which therefore becomes the cost of an average physical education’s teacher at the facility. There are different sources for this money, teachers are civil servants and therefore paid by the government. However, the school and its other related school systems and state departments also have a prerogative for paying teachers owing to their roles in the subsequent positions. Teachers have their entitlement depending on the nature of their assignments at the facility. The school for example must consider its teacher student ration to ensure that it does not overwork its teachers. The state for example pays every teacher $47,957.59 out of the total $74,985.07, which is the actual cost of every teacher. This implies that the rest of the funding comes for the subsequent systems and departments. In this context, the state send s this money to the Newton county school system. The system and the department thus pay every teacher the additional $27,093.01 to make the figure complete. However, teachers just as the rest of civil servants remit their taxes to the government. This therefore reduces the cost of hiring a teacher, since it is the same government paying the teachers and accepting their tax remittance.

The Pillars of Policing Dissertation Example | Topics and Well Written Essays - 10000 words

The Pillars of Policing - Dissertation Example Through the use of the first pillar of helping to create a safe and secured environment the police department focuses on activities like tracking criminals, curbing criminal and vandalistic activities in the region and efficiently dealing with incidents of significant criticality. The second pillar of policing helps Sussex Police in making them better visible and approachable by the general public. Through this pillar the police department of Sussex endeavors to closely knit their activities with different communities to perform in a proactive manner. This practice also helps the police department to retrieve quality information and responses from the people which thereby helps them in curbing crimes. The third pillar is used by the police force to make efficient and optimal use of the human and financial resources of the police organization to effectively track down the criminal operations of the region. (Three Pillars, n.d.). The police force of Scotland operates on the basis of fi ve basic principles to promote a safer region for the citizens to dwell in. These operational principles or the pillars of Scotland police consist of acts like safeguarding the society from criminal activities, breaking the network of drug trafficking, reassuring the general people that they are safe through the conducting of patrolling operations, prioritizing the safety of the road environment for the driving and daily commuters, and finally helping the police force to become increasingly advanced and trained to handle complexities. (Central Scotland Police, n.d.). Similarly the community policing activities of United Kingdom are also based on eight operational pillars which can be enumerated as follows. The first operational pillar of community policing is to reduce the rate of criminal activities and the rate of disorderliness in the region. Secondly the actions of the police must be conducted of, by and for the general public and not for the sake of meeting operational guidelin es. Public approval for police operations is highly essential for reducing the former’s conflicts with the administration. Thirdly following the above context the police administration of a region must reflect a high amount of honor for the citizens of a country in desiring them to abide by the rule of the land. Fourthly the police administration of a country must endeavor to minimize the use force on making the people abide by the rules of the land physical torture affects the cooperative mechanism of the society with the administration. The fifth operational pillar of community policing states however justifies the use of force when all other arbitration mechanisms fail to reduce public tension. Sixthly more specifically the police system in the society must visualize itself as a key force in restoring safety and harmony in the community and thus be socially accountable. Seventhly the operational pillar also holds that the police system must not augment its potential throug h judicial involvement but must depend on its own actions. Finally in the eighth position the operational pillar holds that measurement of true efficiency of the police force is done on by observing the rate of absence of crime and social disorder and not merely the police’s actions related to such. (Special Feature: Historical Perspective, n.d.). The paper in this context draws a comparison of the police actions of United Kingdom with that of United States. The Police system in United

Cheapchip Cooke Project Business Plan Essay Example | Topics and Well Written Essays - 2500 words

Cheapchip Cooke Project Business Plan - Essay Example Next, fixed overhead costs must also be managed with much care because here electricity and gas costs might rise even without the knowledge of the management. A significant percentage of businesses are faced with the threat oc closure nowadays because of the rising energy costs. Finally, cost centers or cost drivers as they are known in accounting jargon, must be identified before costs are allocated to them. Failure to do so will lead to confusion as to which area of the business has higher costs and which less. * Operating Leverage may be defined as the ability of a firm to use its fixed operating costs (rent etc.) to magnify the effect of changes in sales on its earnings before interest and tax (EBIT). The formula for Degree of Operating Leverage (DOL) is: 3. Number of cookies of various categories that can be baked during 180 days are: 1792 x 180 = 3,22,560 while my budgeted annual sales stand at 3,87,082 (the margin of safety output). I assume that the difference of 64,522 cookies can be baked with some overtime work assigned to full-time workers. My calculations of the break-even points or output levels are based on a realistic assumption of what is desirable and achievable given the capacity constraint imposed by the 112 batch of cookies per 30 minutes. Working hours per day cannot be stretched beyond 8 unless overtime payment is given to those workers who willingly work after the 8-hour shift during the night. My calculations of costs both fixed and overhead are based on realistic estimates that included the additional costs of selling cookies such as the cost of 0.25 cents per cookie sold. Also I have taken into consideration the total fixed cost as equivalent to $ 40,000 per year excluding the depreciation charge. I have assumed a breakeven point of 70,000 cookies per annum of type C1 which is priced at $ 0.50. Even if the

Strategic Analysis of Regent Hotel Singapore Research Paper

Strategic Analysis of Regent Hotel Singapore - Research Paper Example Strategic Analysis of Regent Hotel Singapore For example, the firms that existed before Regent Hotel were a major threat. Major potential factors that expose an industry or a company to overcome such challenges may include; a sustainable competitive advantage through innovation. For this case, Regent Hotel established renewable sources of energy, which indeed was a great challenge to existing industries. However, Porter argues that competition between offline and online companies is also a factor need for consideration Secondly, Porter comments profitable markets that yield good profits will attract new industries. This results in many new competitors, which eventually will decrease profitability for all firms in the industry. The following factors can have an effect on how much of a threat new competitors may pose: the existence of barriers to entry for example patents, rights, etc. The most attractive segment is one in which entry barriers are high and exit barriers are low. Here, new firms can enter and non-performing firms can exit easily due to high competition. The following factors have indeed helped Regent Hotel, as a company to sail through government policy not affects Regent Hotel to expand its business. All suppliers of raw materials, components, labor, and services to the firm can be a cause of power over the firm when there are few substitutes. For example if you are making loaves of breads and there is only one person who sells flour, then you have no substitute but to buy it from them.

Answer of 2 Question Essay Example | Topics and Well Written Essays - 500 words

Answer of 2 Question - Essay Example The thickness for this slice is given by ∆z = where Gz is the gradient strength, ∆z is the slice thickness, ÃŽ ³ is the young modulus, and ÃŽ ´f is the offset frequency. Therefore, making the offset frequency to be the subject of the formula we get ÃŽ ´f = where ÃŽ ´f is the offset frequency (Sheil, 44). Hence, From the figure, 7.9 showing out the signal of MRI obtained from fat and water there were two signals that were received. These signals include the signals from water which were at 4.8ppm and the signal from fat which was at 1.5ppm. The signal from water was displayed by a peak that was due to protons in water while that from fat was displayed by a peak due to protons within the fat. In the body of an organism, fat and water are the key components of protons. The molecules of fat and water contain a number of protons whose molecules is extremely beneficial in MR signal. From the figure, there were two peaks. One peak, which was 4.8ppm, was due to protons in water. Another peak, which was 1.5ppm, was due to protons in fat. These two peaks had different ppm because of a number of reasons. First, the relaxation time (T1) for water takes a longer duration of time compared to that of fat. This was evident in figure 7.10 where the weighted T1 image recorded reduced signals from water. In addition to this, transverse time of relaxation (T2) of water that was free had a short correlation time compared to that of fat. The decay of T2 is because of the interactions that are magnetic which occur in between the protons that are spinning. It is for this reason that the fat ppm had a shorter peak compared to that of water. Research has shown out that water has a longer time of relaxation since its natural motion frequency is higher compared to the clinically used larmor frequency (Sheil, 10). Relaxation time involves the time taken by protons to remain either coherent or have a phase rotation. This rotation normally

Cheapchip Cooke Project Business Plan Essay Example | Topics and Well Written Essays - 2500 words

Cheapchip Cooke Project Business Plan - Essay Example Next, fixed overhead costs must also be managed with much care because here electricity and gas costs might rise even without the knowledge of the management. A significant percentage of businesses are faced with the threat oc closure nowadays because of the rising energy costs. Finally, cost centers or cost drivers as they are known in accounting jargon, must be identified before costs are allocated to them. Failure to do so will lead to confusion as to which area of the business has higher costs and which less. * Operating Leverage may be defined as the ability of a firm to use its fixed operating costs (rent etc.) to magnify the effect of changes in sales on its earnings before interest and tax (EBIT). The formula for Degree of Operating Leverage (DOL) is: 3. Number of cookies of various categories that can be baked during 180 days are: 1792 x 180 = 3,22,560 while my budgeted annual sales stand at 3,87,082 (the margin of safety output). I assume that the difference of 64,522 cookies can be baked with some overtime work assigned to full-time workers. My calculations of the break-even points or output levels are based on a realistic assumption of what is desirable and achievable given the capacity constraint imposed by the 112 batch of cookies per 30 minutes. Working hours per day cannot be stretched beyond 8 unless overtime payment is given to those workers who willingly work after the 8-hour shift during the night. My calculations of costs both fixed and overhead are based on realistic estimates that included the additional costs of selling cookies such as the cost of 0.25 cents per cookie sold. Also I have taken into consideration the total fixed cost as equivalent to $ 40,000 per year excluding the depreciation charge. I have assumed a breakeven point of 70,000 cookies per annum of type C1 which is priced at $ 0.50. Even if the

Answer of 2 Question Essay Example | Topics and Well Written Essays - 500 words

Answer of 2 Question - Essay Example The thickness for this slice is given by ∆z = where Gz is the gradient strength, ∆z is the slice thickness, ÃŽ ³ is the young modulus, and ÃŽ ´f is the offset frequency. Therefore, making the offset frequency to be the subject of the formula we get ÃŽ ´f = where ÃŽ ´f is the offset frequency (Sheil, 44). Hence, From the figure, 7.9 showing out the signal of MRI obtained from fat and water there were two signals that were received. These signals include the signals from water which were at 4.8ppm and the signal from fat which was at 1.5ppm. The signal from water was displayed by a peak that was due to protons in water while that from fat was displayed by a peak due to protons within the fat. In the body of an organism, fat and water are the key components of protons. The molecules of fat and water contain a number of protons whose molecules is extremely beneficial in MR signal. From the figure, there were two peaks. One peak, which was 4.8ppm, was due to protons in water. Another peak, which was 1.5ppm, was due to protons in fat. These two peaks had different ppm because of a number of reasons. First, the relaxation time (T1) for water takes a longer duration of time compared to that of fat. This was evident in figure 7.10 where the weighted T1 image recorded reduced signals from water. In addition to this, transverse time of relaxation (T2) of water that was free had a short correlation time compared to that of fat. The decay of T2 is because of the interactions that are magnetic which occur in between the protons that are spinning. It is for this reason that the fat ppm had a shorter peak compared to that of water. Research has shown out that water has a longer time of relaxation since its natural motion frequency is higher compared to the clinically used larmor frequency (Sheil, 10). Relaxation time involves the time taken by protons to remain either coherent or have a phase rotation. This rotation normally

Mark&Spencer Governance Structure Essay Example for Free

MarkSpencer Governance Structure Essay Corporate Governance 1. Group Board The boards role is what management is doing, holding them accountable for performance against the targets and standards, probing and challenging their thinking to make sure that they are on the right track. The Board works closely with management in thinking through their direction and long-term plans, the opportunities, the risks and making sure we are developing the right management team for the future. The non-executives provide independent challenge and review, bringing wide experience, specific expertise and a fresh, objective perspective. As members of the Board Committees, they play a crucial role in undertaking detailed governance work with a particular focus on shareholders. GROUP STRATEGY 1. Overall Group strategy and corporate vision, setting standards and creating a high-performance culture which maximizes value creation and minimizes risk. 2. Creation, acquisition or disposal of corporate entities or assets which are material to the Group. 3. Evaluation of the Group’s competitive position and opportunities arising from the strategies and strengths of competitors. 4. Development and protection of the brand, its values and business principles. 5. Extension of the Group’s activities into new business or geographic areas 2. Nomination Governance Committee To ensure that appropriate procedures are in place for the nomination, selection, training and evaluation of directors and for succession plans, with due regard for the benefits of diversity on the Board, including gender. Terms of Reference 1. To receive a bi-annual Company Chairmans report on board structure, size, diversity (including gender), composition and succession needs, keeping under review the balance of membership between executive and non-executive and the required blend of skills, experience, knowledge and independence on the Board. 2. To ensure the Group’s governance facilitates efficient,  effective and entrepreneurial management that can deliver shareholder value over the longer term. To review any departures from the UK Corporate Governance Code and explanations to shareholders as to how our actual practices are consistent with good governance. 3. To keep under review the leadership and succession needs of the organization with a view to ensuring the long term success of the Group. 4. To formally propose new executive and non-executive directors for the approval of the whole Board, following a formal, rigorous and transparent procedure for such an appointment. 5. To ensure that all directors undergo an appropriate induction program and to consider any training requirements for the Board as a whole. 6. To ensure that Board Committee membership is refreshed and that undue reliance is not placed on particular individuals when deciding chair/membership of committees. 3. Audit Committee Monitors the integrity of the financial statements and reviews effectiveness of internal controls, risk management and audit. Role The Committee assists the Board in fulfilling its oversight responsibilities. Its primary functions are: To monitor the integrity of the financial statements of the Company and any formal announcements relating to the Company’s financial performance, reviewing significant financial reporting judgments contained in them. To review the Company’s internal financial controls and the systems of internal control and risk management. To maintain an appropriate relationship with the Company’s auditors and to review the independence objectivity and effectiveness of the audit process, taking account of the relevant professional and regulatory requirements. To perform his or her role effectively, each Committee member will obtain an understanding of the detailed responsibilities of Committee membership as well as the Companys business, operations and risk. The Committee can obtain its own independent professional advice as necessary. Audit Process 1. To provide an open avenue of communication between the external auditors, the internal auditors and the Board, meeting separately with both at least annually without management. 2. To keep under review the scope and results of the audit and its cost effectiveness and to report periodically to the  Board on significant findings. 3. To meet, as required, with the external auditors, the internal auditors and management in separate executive sessions to discuss any matters that the Committee or these groups believe should be discussed privately with the Audit Committee. External Auditors 1. To recommend to the Board, for annual shareholder approval, the appointment, re-appointment and removal of the external auditors, and to lead the process of putting the external audit contract out to tender, if appropriate, at least every ten years. 2. To assess their qualifications, expertise, resources, effectiveness, independence and objectivity and to review the auditor’s quality control procedures and steps taken by the auditors to respond to changes in regulatory or other requirements. 3. To approve the terms of engagement and the remuneration to be paid to the external auditors in respect of audit services provided. To review the nature and extent of non-audit work undertaken by the external auditors. In some cases the nature of advice may make it more timely and cost-effective to select them. They may also be appointed for consultancy work but only after rigorous checks to confirm they are the best provider including competitive tender and does not impair the external auditor’s independence. To confirm that the Committee approval process for non-audit fees has operated for the period under review. 4. To review with the Chief Finance Officer and the external auditors the scope and results of the external audit and any significant findings reported to the Committee in the management letter, receiving updates from management on action taken. Internal Auditors 1. To ensure that the internal audit and risk department is adequately resourced and continues to have appropriate standing within the Company, and to keep under review its members’ independence and objectivity. 2. To review with the external auditors and Head of Internal Audit and Risk, the internal audit program and any significant findings, including fraud, illegal acts, deficiencies in internal control or similar issues and review management’s responsiveness to the auditors findings and recommendations. 3. To monitor and review the effectiveness of the internal audit and risk function. 4. Remuneration Committee Recommends remuneration strategy and framework to recruit, retain and reward senior executives for their individual performance. Role To recommend to the Board the senior remuneration strategy and framework, giving due regard to the financial and commercial health of the Company and to ensure the Chairman, Chief Executive , executive directors and senior management, (currently together comprising Reward Levels H and G) are fairly rewarded for their individual contributions to the Company’s overall performance. Terms of Reference 1. To determine and agree with the Board, and taking such external advice as necessary, the appropriate policy for rewarding the Company’s Chairman, Chief Executive, executive directors and senior management. 2. To establish the selection criteria, selecting, appointing and setting terms of reference for any remuneration consultants who advise the Committee. 3. On behalf of the Board to prepare, and to place before shareholders at each annual general meeting, a report setting out the Company’s policy and disclosure on senior remuneration as required by the Directors Remuneration Report Regulations 2002 and other associated legislative or regulatory requirements. 4. To determine for each annual general meeting any aspect of remuneration policy should be brought to shareholders that requires their specific approval, eg share schemes, in addition to the remuneration report which will be submitted to shareholders annually for general approval. 5. To undertake appropriate discussions as necessary with institutional investors on policy or any other aspects of senior remuneration. 6. Annually to review and update its terms of reference, recommending any changes to the board and to evaluate its own membership and performance on a regular basis. * The remuneration of non-executive directors is determined by the Chairman and Chief Executive together with the executive directors. 5. Governance Group Supports colleagues by providing governance support and oversight that is meaningful, relevant and focused on ensuring the business is doing the right things the right way both in the UK and overseas. The Governance Group  engages across the business and comprises legal, audit and risk, insurance, archive, pensions, employee representative and secretariat, reporting on its activities regularly to the Board in the Group Secretary’s report. Giving guidance to colleagues on doing the right thing, the right way including ethics’ code: 1. Implementing practical and cost-effective responses to legislation and regulation. 2. Reviewing and making our policies and practices more accessible. 3. Minimizing trading disruption and legislative consequences. 4. Leveraging business initiatives and sharing best practice. 5. Negotiating contractual terms and protecting our brands and innovation. 6. Providing assurance on internal controls and visibility of key risks. 7. Minimizing insurance premiums, claims and fines. 8. Protecting and promoting our brand heritage. 9. Enabling the Company to meet its pension liabilities. 10. Assisting employee and shareholder engagement. 11. Supporting directors in their Board and Committee roles. Operational Governance 6. Executive Board Accountable for running the business, making sure we are doing the right thing day-to-day and delivering the Group’s strategy. It allocates capital and controls all non-property investments with a risk of material impact on financial results, brand or strategy. It keeps the Board regularly informed about the business and how we work with our different stakeholders. Its work is supported by a number of operational committees and functions. The EB exists to run the business and deliver the Group’s strategy as approved by the Group plc (public limited company) Board: To develop and review strategic opportunities and initiatives for the Group; to evaluate the Group’s competitive position and determine strategies to protect MS, its sub-brands, values and business principles and to consider the impact on key stakeholders; To manage the day to day business, responding to market conditions and trends with appropriate plans for pricing and promotions; To agree and deliver the Group’s financial and operational plans and forecasts; and to deliver these plans and monitor performance against the Group plan, financial forecasts and quarterly revisions; To act as the authorizing  Board for all non-property expenditure (including non-retail property investments e.g. warehousing) subject to the authority set out below. To recommend to the Group Board all expenditure in excess of this authority; To regularly monitor performance against pre-determined criteria to ensure non-property investments deliver required returns; To monitor the Group’s business processes systems and controls; To identify, evaluate, monitor and manage the Group’s risks (including financial, commercial, information security, HWDB, ethics and compliance, business continuity, fire, health and safety) to enhance the Group’s performance and its assets; To review leadership development and succession across the Group; to review HR strategy, including reward framework, employee bonus (excluding those determined by the Remuneration Committee), conditions of employment and pension schemes and people matters; To drive overall Group performance through setting and tracking their own clear objectives which are cascaded throughout the Group and changing ways of working; To review and update annually its terms of reference, recommending any changes to the Group Board and to evaluate its own membership and performance on a regular basis. 7. Management Committee To monitor the development of the Group’s work streams against the Group’s three year plan and to safeguard cross-functional co-operation of the work streams: to input to the Group’s strategic plan on an annual basis ; to cascade the relevant information to the business ; members of the management committee may be asked to present updates to the management committee to keep everyone informed 8. Property Board The property board ensures capital expenditure is allocated to the Group’s UK and International property portfolio (including Retail Property, Head Office Buildings and Core Investment) in line with the Group’s strategic goals and business priorities, whilst also ensuring maximum flexibility: To recommend to the Executive/Group Board the allocation of the property capital expenditure plan and the relevant investment policies on a three year cycle. To approve and control all UK property expenditure (including Retail Property, Head Office Buildings and Core Investment), projects, and programs  on a three year cycle, within delegated authority limits from the Group Board. To approve all International property expenditure (including Retail Property, Head Office Buildings and Core Investment) relating to joint ventures and wholly owned subsidiaries within delegated authority limits from the Group Board. To regularly monitor performance of all UK and International stores against pre-determined criteria to ensure property investments deliver required returns. To identify, evaluate and manage risks relating to property investment expenditure. To review and update annually its terms of reference, recommending any changes to the Executive Board and Group Board and to evaluate its own membership and performance on a regular basis. 9. Customer Insight Unit Influences decision-making by tracking marketplace trends, our customer barometer and customer views. The customer insight unit ensures customers to gain a real understanding of what they want, what they think and how they behave. The customer insight unit is vital in ensuring that our customers’ needs are recognized in any decision taken by the business. 10. How We Do Business Committee To ensure that ‘How we do business’ is an integral part of the business and the way it operates. Terms of Reference Its primary function is to oversee implementation of Plan A, the Company’s ‘eco plan’ launched in January 2007 which sets out 100 commitments across the challenges of Climate change, Waste, Sustainable raw materials, Fair partner and Health: 1. To provide leadership on HWDB across the business. 2. To ensure all parts of the business: †¢ Have assigned clear roles and responsibilities for delivering Plan A †¢ Have a resourced project plan for delivering all aspects of Plan A †¢ Report on progress in implementing Plan A on a regular basis †¢ Have robust data and evidence to support progress claims †¢ Gain the external assurance levels agreed by the Audit Committee †¢ Benchmark themselves against their competitors †¢ Understand stakeholder expectations on HWDB issues (customers, employees, shareholders, opinion formers) †¢ Have the resources and skills to implement the plan †¢ Are maximizing the communication potential of the issues they are managing. 3. To seek external stakeholder views on our overall performance and maintain an overview of external benchmarking and commentary on our performance. 4. To oversee any internal and external auditing of our performance. 5. To oversee external reporting on our performance and progress against our Plan A targets. 6. To provide the Board with an overview of the social, environmental and ethical impacts of the Group’s activities and how they are being managed. 7. To review and update annually its terms of reference, recommending any changes to the Board and to evaluate its own membership and performance on a regular basis. 11. Business Involvement Groups Every store and every business area has BIG representatives, elected by their colleagues to represent their views. Through the business involvement group network, the business informs, involves and consults employees so their views can be influence business change and decision-making. Commitment to BIG means that MS colleagues have the chance to voice their opinions and ideas, get answers and have their views represented when the business considers changes that affect them. This means they all have an opportunity to positively influence the business they are work in. 12. Fire, Health, and Safety Committee Promotes the safety and well being of our employees, customers and visitors and minimizes the risk of financial penalties. 13. Business Continuity Committee Role The Committee will keep under review the effective management of business continuity across the Marks Spencer Group with the objective being to galvanize the development and maintenance of effective means to continue business in the event of a significant interruption to business. It will provide leadership on BC policy across the Group and will ensure that the Policy is integrated into every aspect of the Group’s critical operations  around the world.

Design of Face Recognition Image Processor

Design of Face Recognition Image Processor Abstract This project deals with the design and implementation of an image processing system for Face recognition using MATLAB. Image treatment is a complex task so, we must study all the background information that image formation and processing requires, and learn the main MATLAB functions which will have to be used. The purpose for this study is to investigate a software application that can show how an image is processed in computer platform. The processing will be done in comparing the sketch image with the real picture to matrix model by using MATLAB program. Picture will be shown when program is running successfully. Real image or picture will be resulted from the matrix using the function in the MATLAB. We can use various functions such as filter or rotate depending on the user itself. In this study, the picture or real image used is from Internet that has referenced properly, scanner and etc. Basic mathematical calculation does not apply in this project as it only used MATLAB program. The significant of this project is to educated user and for us to learn how to process images by MATLAB to learn how the image can be changes after the function indicated by the program. Introduction: Our project is about to know how we can employ image processing application by using MATLAB functions. By the help of image processing Toolbox of MATLAB we were able to modify/write a program with GUI to read images, process them, blur them, and then recognize them as versions of the same images that exist in an image database; lastly we were able to display the original and blurred images. Image processing is the field of signal processing where both the input and output signals are images. Images can be thought of as two-dimensional signals via a matrix representation, and image processing can be understood as applying standard one-dimensional signal processing techniques to two-dimensional signals. Image processing is a very important subject, and finds applications in such fields as photography, satellite imaging, medical imaging, and image compression, just to name a few. In the past, image processing was largely done using analog devices. However, as computers have become more powerful, processing shifted toward the digital domain. Like one-dimensional digital signal processing, digital image processing overcomes traditional analog problems such as noise, distortion during processing, inflexibility of system to change, and difficulty of implementation. The image processing technique we will be implementing will be image blurring even there are many image processing techniques we have by using MATLAB to output the image as a matrix and store it in the data memory. In todays world, digital technology is ever growing, and the development of digitally based products is rising. Various industries such as audio, video, and cellular industry rely heavily on this digital technology. A great part of this deals with digital signal processing. This aspect in engineering has gained increasing interest, especially with much of the world now turning to wireless technology and its applications to keep businesses and industries connected. The world of digital technology is certainly one that will be present for many years to come. [Ref: 4] Project outline: This report consists four chapters. In first chapter, it discuss about the objective and scope of this project as long as summary of works. While Chapter 2 will discuss more on theory and literature reviews that have been done. In Chapter 3, the discussion will be on the methodology hardware and software implementation of this project. The result and discussion will be presented in Chapter 4. Last but not least, Chapter 5 discusses the conclusion of this project and future work that can be done. Problem Statement: In the image processing program, the info for the function are not stated clearly enough and make people understand. In the GUI (Graphical User Interface) program, the info should function as pop-up window after user press any function button. As the project title is Image Processing using MATLAB Learning Tool, the information is not good enough and clears to understand to be recognized by people. The main problem is the effectiveness of people to recognize it. Basically we have used many techniques through which we tried to simplified the way of face recognition. We have used eigenface technique that is very standarlize way to recognize the face using MATLAB application MATLAB also can be used in industry in the areas of bar coding, deck-top publication, copy preparation for printing and factory automation. However, due to the information and studies this state of program of image processing that I only can create. More advance and more functional program can be creating by using MATLAB. Thereby, to write the program became problem and this project not perfectly complete. The problem which comes to set a task to recreate the convolution function for applying filters in image processing. It is very difficult to manage and get the code working. It is also not easy to write our own m-function for unsharp masking of a given image to produce a new output image. During the project development we found following difficulties Apply smoothing to produce a blurred version of the original image, subtract the blurred image from the original image to produce an edge image. Add the edge image to the original image to produce a sharpened image. When carrying out the convolution image is cropped down by some pixel, this means when we go to carry out the subtraction for the unsharpening the images are not the same size and the subtraction cannot take place. To overcome this problems we created a blank matrix in the convolution function that is the same size as the image being inputted, the new image will then go on top of this matrix so in affect the new image has a 1 pixel border around it to make it to its original size. It is very interesting and challenging to come out from these above mentioned problems and for that we have done. Solutions to problems in the field of digital image processing generally require extensive experimental work involving software simulation and testing with large sets of sample images. Although algorithm development typically is based on theoretical underpinnings, the actual implementation of these algorithms almost always requires parameter estimation and, frequently, algorithm revision and comparison of solutions. Because it works in the MATLAB computing environment, the Image Processing Toolbox offers some significant advantages Key components of our approach We have used Eigen Vector method [Ref 12] that is a set of eigenfaces can be generated by performing a mathematical process called principal component analysis (PCA) on a large set of images depicting different human faces. Informally, eigenfaces can be considered a set of standardized face ingredients, derived from statistical analysis of many pictures of faces. Any human face can be considered to be a combination of these standard faces. For example, ones face might be composed of the average face plus 10% from eigenface 1, 55% from eigenface 2, and even -3% from eigenface 3. Remarkably, it does not take many eigenfaces combined together to achieve a fair approximation of most faces. Also, because a persons face is not recorded by a digital photograph, but instead as just a list of values (one value for each eigenface in the database used), much less space is taken for each persons face. Apart from these our project methodology includes the following: Use MATLAB to simulate the processing technique. Carefully locating the memory blocks where we will store our original and output image. Comparing our results in MATLAB. Basically the eigenvectors of a square matrix are the non-zero vectors that, after being multiplied by the matrix, remain proportional to the original vector (i.e., change only in magnitude, not in direction). For each eigenvector, the corresponding eigenvalue is the factor by which the eigenvector changes when multiplied by the matrix. The eigenvectors are sometimes also called proper vectors, or characteristic vectors. Similarly, the eigenvalues are also known as proper values, or characteristic values. The mathematical expression of this idea is as follows: if A is a square matrix, a non-zero vector v is an eigenvector of A if there is a scalar ÃŽ » (lambda) such that The scalar ÃŽ » is said to be the eigenvalue of A corresponding to v. An eigenspace of A is the set of all eigenvectors with the same eigenvalue together with the zero vectors. However, the zero vector is not an eigenvector. any problems present themselves in terms of an eigenvalue problem: A ·v=ÃŽ »Ã‚ ·v In this equationAis an n-by-n matrix,vis a non-zero n-by-1 vector and ÃŽ » is a scalar (which may be either real or complex). Any value of ÃŽ » for which this equation has a solution is known as an eigenvalue of the matrixA. It is sometimes also called the characteristic value. The vector,v, which corresponds to this value is called an eigenvector. The eigenvalue problem can be rewritten as A ·v-ÃŽ »Ã‚ ·v=0 A ·v-ÃŽ »Ã‚ ·I ·v=0 (A-ÃŽ »Ã‚ ·I ·v)=0 If v is non-zero, this equation will only have a solution if |A-ÃŽ »Ã‚ ·I|=0 This equation is called the characteristic equation ofA, and is an nthorder polynomial in ÃŽ » with n roots. These roots are called the eigenvalues ofA. We will only deal with the case of n distinct roots, though they may be repeated. For each eigenvalue there will be an eigenvector for which the eigenvalue equation is true. This is most easily demonstrated by example Example: Find Eigenvalues and Eigenvectors of a 22 Matrix If then the characteristic equation is and the two eigenvalues are ÃŽ »1=-1, ÃŽ »2=-2 All thats left is to find the two eigenvectors. Lets find the eigenvector,v1, associated with the eigenvector, ÃŽ »1=-1, first. so clearly from the top row of the equations we get Note that if we took the second row we would get In either case we find that the first eigenvector is any 2 element column vector in which the two elements have equal magnitude and opposite sign. Where k1is an arbitrary constant. We didnt have to use +1 and -1, we could have used any two quantities of equal magnitude and opposite sign. Going through the same procedure for the second eigenvalue: Again, the choice of +1 and -2 for the eigenvector was arbitrary; only their ratio is important. Scope of Project The scope of our project includes the following: Study and understand the image processing in varies method, mainly in MATLAB. Create a GUI (Graphical User Interface) MATLAB program with several functions. This requires identifying the steps which must be done to obtain some results. Further this project, the main areas considered are: Study about MATLAB, and its main functions to obtain and process images. Write or modify a program which can be used to acquire and treat images. Some information about the image file and its characteristics to understand the information it contains. Objective of the Project The objective of this project is actually to educate us and new comers to basic and fundamental technique in image processing through integrated image processing software. All fundamental algorithms of image processing will be exposed through this package [Ref] the program is in appendix -B. This package will also provided easy-to-learn mechanisms turn user-friendly and graphic-orientation environment. These operations include preprocessing, spatial filtering, image enhancement, feature detection, image compression and image restoration involves process which restores a degraded image to something close to the ideal. Generally, in computer vision, especially in MATLAB program (image understanding or scene analysis) involves technique from image processing, pattern recognition and artificial intelligent. Particularly, MATLAB program offers many features and are more multifaceted then any calculator. MATLAB toolbox is a tool for making mathematical calculations. Literature review (Related Work to our Project) Image processing is any form of signal processing for which the input is an image, such as photographs; the output of image processing can be either an image or a set of characteristics or parameters related to the image. Most image-processing techniques involve treating the image as a two-dimensional signal and applying standard signal-processing techniques to it. Image processing converting the image to another form by using direction in MATLAB/Toolboxes/Image Processing tables for example is image input/output, color operation, image enhancement/ analysis and another method. Image processing and computer vision practitioners tend concentrate on a particular area of specialization. People refer to their research interests as â€Å"texture†, â€Å"surface mapping†, â€Å"video tracking†, and the like. Nevertheless, there is a strong need to appreciate the spectrum and hierarchy of processing levels. Image processing is the manipulation of the image by using a computer, with the objective to enhance or evaluate some aspect of an image which is not readily apparent in its original form. This is done through the development and implementation of processing means necessary to operate on the image. Processing image using a digital computer provides the greatest flexibility and power for general image processing application, since the programming of a computer can be changed easily which allows operation to be modified quickly. Interest in image processing technique dates back to early 1920s when digitized pictures of world news events were first transmitted by submarine cable between Newyork and London. However, application of digital image processing concepts did not become widespread until the middle 1960s, when third-generation digital computers began to offer the speed and storage capabilities required for practical implementation of image processing algorithms. Since then, this area has experienced vigorous growth and has been subjected of study and research in such fields as engineering, computer science, statistics, information science, physics, chemistry and medicine. The result of these efforts have established the value of image processing technique in of problem with application in diverse fields, including automated factory controlled, astronomy, meteorology, agriculture, medicine, art and military application. With the increasing availability of reasonably inexpensive hardware and some very importance application on the horizon, image technology is expected to continue its growth and to play an important role in the future. From the MATLAB software we have the Toolbox for image processing and Professional MATLAB. MATLAB is the interactive environment, scientists and engineers are able to analyze and develop algorithms with exceptional improvements n productivity and creativity. As a result of new algorithms with application-specific uses. The MathWorks offers a series of application toolboxes that contain set of MATLAB ofr the Linear algebra, high-speed computational kernel, extensive mathematical functionality, data analysis, 2-D and 3-D graphic rapid algorithm development, matrix based programming environment. In MATLAB Toolboxes professional version but priced at a lower rate for academic use. [Ref: 4] About Image Processing Tools of Matlab This set of Matlab tools consists of some functions that I have found useful for basic image processing and image analysis. When working with binary objects (4-connected foreground regions), we have often found it useful to measure features from the boundary stored as a list of coordinates. In other words, sometimes it is better to work with a polygon defining the foreground-background boundary than to work with a black and white image of the object. The boundary of an object in a binary (black and white) image can be stored as a list of pixel corner coordinates. The functiongetboundarymex [Ref 7] forms a list of these corner coordinates from a binary image containing an object. The toolbox containsselectobjectmexfor selecting regions by size. The commandimOut=selectobjectmex(imIn,n)will return an image,imOut, containing only thenth largest object (in terms of number of pixels) of the original imageimIn. This function is particularly useful if one wants to quickly threshold an image and then select the largest object without having to worry about smaller objects that are not of interest, e.g.imOut=selectobjectmex(im>0.5,1). [Ref:9] Also included is code for watershed segmentation by flooding from selected sources, fast calculation of object centroids etc. The usage of each the function is described by typinghelpfunctionat the MATLAB command prompt, wherefunctionis the name of the relevant function. The M-file scriptkftools shows an example of the usage of all of the functions in this toolbox . THEORY: There are various ways of implementing the image blurring technique: Linear blur horizontal or vertical averaging of a fixed number of pixels. Block blur averaging a small block of pixels by propagating a fixed sized window through the entire image. Gaussian blur convolution of the image with a two-dimensional Gaussian function. Linear blur: This is the simplest image blurring technique. It is done by taking the N-point average of a linear block of pixels (either horizontally or vertically). In our implementation, N will be 8, and we will be using the horizontal blur. An 1Ãâ€"N-pixel window is placed at the top left of the image, and the average of the window is stored in the N/2th pixel of the window (in a new image to prevent overwriting). The window is then shifted across the row and the process is repeated. Once the window reaches the end of the row, it is moved to the next row and the process repeats itself. [Ref:11] The advantage of this method is that it is the simplest of the three. However, it also gives the poorest blurring quality. This is because by taking the horizontal average of each row, there will be averaging â€Å"lines† in the output image. Also, parts of the picture where the detail does not span enough horizontal pixels will be lost after blurring. Finally, by the way this algorithm is designed, there will be an outer frame of the output image identical to the input image (i.e. the outer part of the image remains not blurred). [Ref:11] Block blur: This method is analogous to the linear blur, except that our window is now an NÃâ€"N-pixel window. The procedure is the same as the linear blur, with the averaged pixel stored in the (N/2, N/2) position of the window. See block_blur.m for the MATLAB implementation of this algorithm. This method improves upon the quality of the linear blur in that averaging â€Å"lines† are no longer visible in the output image. It also helps to retain details that span small horizontal distances in the original image better. However, it still does not overcome the problem of an outer frame in the output image that remains not blurred. [Ref:11] Gaussian blur: This is the best implementation of the image blurring technique, and is used in such commercial software as Adobe Photoshop. Unfortunately, it is also the most complex. It works by performing a two-dimensional convolution on the input image with a normalized two-dimensional MÃâ€"M-pixel Gaussian function. Intuitively, each pixel of the output image is actually a Gaussian function centred at each point of the input image. Hence, the convolution will increase the size of the output image to N+M-1, so that after convolution we must crop the image to reduce it to its proper size. This method is the best of the three. It has no averaging â€Å"lines† present, and it also blurs the entire image. Image Processing Toolbox (give reference to the Toolbox) Image Processing Toolbox provide us a comprehensive set of reference standard algorithms and graphical tools for image processing, analysis, visualization, and algorithm development. We can perform image enhancement, image deblurring, feature detection, noise reduction, image segmentation, spatial transformations, and image registration. Image Processing Toolbox supports a diverse set of image types, including high dynamic range, gigapixel resolution, ICC-compliant color, and tomographic images. Graphical tools let we explore an image, examine a region of pixels, adjust the contrast, create contours or histograms, and manipulate regions of interest (ROIs). With the toolbox algorithms we can restore degraded images, detect and measure features, analyze shapes and textures, and adjust the color balance of images. Key Features Image enhancement, filtering, and deblurring Image analysis, including segmentation, morphology, feature extraction, and measurement Spatial transformations and image registration Image transforms, including FFT, DCT, Radon, and fan-beam projection Workflows for processing, displaying, and navigating arbitrarily large images Modular interactive tools, including ROI selections, histograms, and distance measurements ICC color management Multidimensional image processing Image-sequence and video display DICOM import and export We have collected many image processing function which can make our project easy to execute , some of these function we used are as follows. Image Display and Exploration Immovie: Make movie from multiframe image Implay: Play movies, videos, or image sequences Imshow: Display image Imtool: Image Tool Montage: Display multiple image frames as rectangular montage Subimage: Display multiple images in single figure Warp: Display image as texture-mapped surface Image File I/O analyze75info: Read metadata from header file of Analyze 7.5 data set analyze75read: Read image data from image file of Analyze 7.5 data set Dicomanon: Anonymize DICOM file Dicomdict: Get or set active DICOM data dictionary Dicominfo: Read metadata from DICOM message Dicomlookup: Find attribute in DICOM data dictionary dicomread: Read DICOM image Dicomuid: Generate DICOM unique identifier Dicomwrite: Write images as DICOM files Hdrread: Read high dynamic range (HDR) image Hdrwrite: Write Radiance high dynamic range (HDR) image file Interfileinfo: Read metadata from Interfile file Interfileread: Read images in Interfile format Isrset: Check if file is R-Set Makehdr: Create high dynamic range image Nitfinfo: Read metadata from National Imagery Transmission Format (NITF) file Nitfread: Read image from NITF file Openrset: Open R-Set file Rsetwrite: Create reduced resolution data set from image file Image Types and Type Conversions Demosaic: Convert Bayer pattern encoded image to truecolor image gray2ind: Convert grayscale or binary image to indexed image Grayslice: Convert grayscale image to indexed image using multilevel thresholding Graythresh: Global image threshold using Otsus method im2bw: Convert image to binary image, based on threshold im2double: Convert image to double precision im2int16: Convert image to 16-bit signed integers im2java2d: Convert image to Java buffered image im2single: Convert image to single precision im2uint16: Convert image to 16-bit unsigned integers im2uint8: Convert image to 8-bit unsigned integers ind2gray: Convert indexed image to grayscale image ind2rgb: Convert indexed image to RGB image label2rgb: Convert label matrix into RGB image mat2gray: Convert matrix to grayscale image rgb2gray: Convert RGB image or colormap to grayscale We both studied the function properly and found few of them are very important for us to understand deeply. In order to segregate the most important function we select some of from them. System description: This project will use the MATLAB software package to develop algorithms which can automatically analyze these images for potential comets. MATLAB is a high-level programming environment very popular with scientists and engineers because of its powerful toolboxes and easy to use scripting language. Basic algorithms from the image processing toolbox will be utilized to find comets using the following general steps: Load original images into MATLAB Process images to isolate all bright spots and eliminate glare due to solar ejections Compare spots in subsequent images to find potential comet trajectories Analyze trajectories to ensure they meet known characteristics Highlight possible comets in original images and create output image Basically, MATLAB software has many functions/commands to apply in image processing. How to manipulate the program depending to us but must be practically know what item is MATLAB program will be used. Creativity in MATLAB can make the interesting result. Even, the complex data can be solved in MATLAB. Especially when the data involved is very complex. Here, we can create some image from converting data by using the some program in MATLAB, which just applied all procedure in the MATLAB program. MATLAB toolbox is a tool for making mathematical calculations. Image processing toolbox is user friendly programming language with feature more advanced. In the program also used the GUI (Graphical User Interface, move this definition to the first place where we used GUI) to create develop the program. Techniques and algorithm: Image and MATLAB involves the conversion of scene into a digital representation that can be processed by a digital computer. This can be performed by a sensor system specially designed to view a image and provide a digital representation of the image. When the images are installed in MATLAB, my picture for example, the color of that image is first analyzed. In the process include several functions of image processing technique. Processed Image is the image display after the process. GUI (Graphical User Interface) A graphical user interface (GUI) is a graphical display in one or more windows containing controls, called components that enable a user to perform interactive tasks. The user of the GUI does not have to create a script or type commands at the command line to accomplish the tasks. Unlike coding programs to accomplish tasks, the user of a GUI need not understand the details of how the tasks are performed. GUI components can include menus, toolbars, push buttons, radio buttons, list boxes, and sliders just to name a few. GUIs created using MATLAB tools can also perform any type of computation, read and write data files, communicate with other GUIs, and display data as tables or as plots Most GUIs wait for their user to manipulate a control, and then respond to each action in turn. Each control, and the GUI itself, has one or more user-written routines (executable MATLAB code) known as callbacks, named for the fact that they call back to MATLAB to ask it to do things. The execution of each callback is triggered by a particular user action such as pressing a screen button, clicking a mouse button, selecting a menu item, typing a string or a numeric value, or passing the cursor over a component. The GUI then responds to these events. We, as the creator of the GUI, provide callbacks which define what the components do to handle events. This kind of programming is often referred to as event-driven programming. In the example, a button click is one such event. In e vent-driven programming, callback execution is asynchronous, that is, it is triggered by events external to the software. In the case of MATLAB GUIs, most events are user interactions with the GUI, but the GUI can respond to other kinds of events as well, for example, the creation of a file or connecting a device to the computer. We can code callbacks in two distinct ways: As MATLAB functions, written in M and stored in M-files As strings containing MATLAB expressions or commands (such as c = sqrt(a*a + b*b);or print) Using functions stored in M-files as callbacks is preferable to using strings, as functions have access to arguments and are more powerful and flexible. MATLAB scripts (sequences of statements stored in M-files that do not define functions) cannot b e used as callbacks. Although we can provide a callback with certain data and make it do anything we want, we cannot control when callbacks will execute. That is, when wer GUI is being used, we have no control over the sequence of events that trigger particular callbacks or what other callbacks might still be running at those times. This distinguishes event-driven programming from