Wind Energy in Scotland Essay Example | Topics and Well Written Essays - 2000 words

Wind Energy in Scotland - Essay Example Wilson further considers the site near Peebles in the Scottish Borders one of the most powerful in the country with 24 wind turbines, each standing 75 metres high. If all planned wind farms go ahead, Wilson notes, the Borders will be the renewable energy capital of Britain, with more jobs for more people and the ability to help the Government meet its own targets of 10% of electricity being produced from sustainable energy by 2010. The optimism expressed by the energy minister, however, is one-sided and does not take into consideration any of the controversy surrounding use of wind power. Nick Goodall (2002) of the British Wind Energy Association (BWEA) expresses his belief that the major issues involved in utilising wind resources are not technical but institutional. 'Planning' and 'Connection' are two areas of principal concern. One potential threat to further development of wind energy is the existence of small but vocal anti-wind farm activist groups. BWEA suggests that configuration of smaller-scale wind farms should be considered along with larger on- and offshore projects. Inclusive working groups should be established to consider the interests of all affected parties. Planning, connection and marketing issues require continued attention. Electricity generation accounts for only 20% of Scotland's energy needs according to the Institute of Electrical Engineers (IEE) (Paterson, 2006), and the apparently simple resolution of using wind sources could take away from research into other renewable resources. However, if hydrogen technology increases sufficiently, IEE suggests that an increased electricity component might be necessary. Global considerations should be addressed when developing wind energy policies. Interactions between different policy instruments should be carefully assessed to avoid potential conflicts and inefficiencies. The decline of oil and gas fields of the UK continental shelf will increase Scotland's dependence on non-indigenous sources; in the longer term, global competition for primary energy will grow as global competitors increase along with gradual depletion of global resources. In use of wind, wave and tidal technologies, wind power represents the most feasible option; however the variability of wind power could create considerable technical challenges for the management of the grid and could necessitate substantial thermal back-up capacity (Paterson, Section 4, pp. 2-3). In Scotland, wind is taken for granted, but it definitely is not available at the same degree of power from day to day. A mix of generation technologies that can be connected at every level of the electricity supply chain needs to be developed. Some of the new technologies, particularly wind, introduce new challenges due to the inherent variability of power supply. In Scotland's government report on strategies for developing a renewable energy program (Choosing, 2005), rhetoric throughout the report overwhelms the

The Role of Early Relationships Essay Example for Free

The Role of Early Relationships Essay In this assignment I will discuss the role of early relationships in the development of child behaviour. This involves many factors such as the family, child rearing styles, theory and development of attachment. I will discuss and explain experiences which I have come across within the childrens sector and how these are influenced by the developmental theory. I will then discuss in depth how the main developmental perspectives play a part in early years. P3. The role of family when considering child rearing is vital as this is where the bonding process begins; as this bond is formed the child develops an attachment to the person therefore creating a relationship. This bond in the beginning is primarily developed with the babys main care provider, not necessarily the mother, as children are brought up in diverse family structures. Family structures such as: nuclear family which involves both parents being together to bring up the child not relying on others for support, lone parent families which is either the mother or father bringing the child up with out the support of a partner, reconstituted families where two adults become partners whilst parenting children from a previous relationship and finally extended families where there is a close knit support from other family members such as grandparents who live together with the parent(s) and child. Many families dont fit ideally into just one of these support units and may be a single parent family with the close support of other family members even though they do not live together as one family unit, this then affects the people which the child develops primary attachments with as the parent may work and the grandparents become the main childcare providers for the child therefore forming multiple attachments. P3. The ways in which child rearing has developed over time has changed dramatically not only due to the ways in which a family is structured but how the care is managed. The first theory of child rearing was developed by Truby King he suggested babies should be toilet trained as young as possible, have a feeding routine and spend lots of time outdoors in order to reduce the chances of infant mortality and disease therefore cutting down the adult to child contact. We now realise that this would affect the childs opportunities to bond, develop relationships and attachment with its carers. During the 1950s and 1960s Benjamin Spock, whos theory is more child-lead than the previous, emphasised the importance of building a strong relationship between the child and its carers by encouraging parents to be more flexible with the child illustrating more affection listening to the childs individual needs but still appreciated the need for a routine. His suggestions, which were published as a guide to parents, counteracted the strict advice of paediatricians and doctors at this time. Medical professionals insisted that unremitting feeding routines should be undertaken whilst they also disapproved of parents openly showing affection towards their child. What good mothers and fathers instinctively feel like doing for their babies is usually best after all (Spock B, Saidwhat.co.uk) His theory was focused on the physical aspect of relationship development believing that the child should be wrapped up to give them the feeling of security as they had in the womb of their mother, he believed that routine changes and feeds every four hours would suffice the child and leave them feeling happy, he also believed that a babys every cry should not be answered if the routine was in place as they didnt physically need anything more. P3. Penelope Leach developed further this approach suggesting that child rearing should be child-centred rather than child lead, meaning that responding to the childs social, emotional and cognitive needs not only reaffirmed the child but also the parents by allowing more bonding time. She helped parents understand their childs needs and cries, suggesting on-demand feeding is a better approach than feeding at set times as it better suits the childs individual needs. Leach therefore allowed parents to be carers of their child permitting them to spoil their child with love and affection rather than being there to enforce control and discipline. P3. Kitzinger looked into this further in the mid 1970s and believes that a child should be cared for in a way that is natural and instinctive for both the child and the mother. Sheila Kitzinger says that parents need to see their children as social beings that need human interaction and companionship not just servicing by being fed, bathed and changed.

PC Monitoring of Dynamometer

PC Monitoring of Dynamometer ABSTRACT The aim of the project PC MONITORING OF DYNAMOMETER is to measure and display the Speed Torque and Power of Motor. The behaviour of motor under load and no load characteristics have been studied with the help of virtual instrumentation. The variations in the motor Speed, Torque and Power at no load torque and full load torque have been analysed. Power determines the efficiency of the motor. Torque is varied by altering resistance in the dynamometer control circuit. The entire system will interface with a PC providing virtual instrumentation and data logging facilities. The graphical programming software has been used to study the characteristics of the motor by loading. Data logging and analysis is done by implementing the concept of LabVIEW. AIMS The aim of the project to build and develop the LabVIEW Program to acquire and analyse the data with the help of ADC card. Speed, Torque and Power of the shunt wound dc motor are acquired and analysed. OBJECTIVES Implement the concept of virtual instrumentation. Develop LabVIEW program to acquire Torque, Speed and Power. Analyse the motor characteristics under load and no load using the visual programming. To show the difference between acquiring the data manually and applying Virtual Instrumentation. Chapter 1 gives the introduction to the Motors, Labview and the literature review to realise the project. Chapter 2 is the study of Virtual Instrumentation and Labview programming. Chapter 3 explains the terms Torque, Speed Power asscociated with the shunt motor. Chapter 4 includes the experimental setup for the project with the specifications and the individual work of each and every component. Chapter 5 discussion part includes the introduction to LabVIEW tools used in the programming for the project. Chapter 6 contains the analysis for the manual operation of the motor when load is applied. Includes Torque, Speed, and Voltage characteristics. Chapter 7 includes the labview program for Speed, Torque and Power with the analysis for motor under loaded conditions. Chapter 8 includes the conclusions and the future scope of the project. CHAPTER-1 INTRODUCTION The extent to which electrical energy is used has influence on the development of industry and the economic prosperity of nation. Therefore rather than conserving the energy, methods need to be implemented to control the electrical energy and hence it can be possible only when the problems associated with the system are analysed and rectified with use of technology and time limitation. In industries the shunt wound motors are used where speed control is a critical aspect. The shunt wound motors are highly flexible, versatile and even the operation costs are minimum. The speed of rollers in large rolling mills is an very important aspect to be measured. In this type of application the rpm of each motor is measured and compared to setpoints. Under load motors draw more current which may damage the working capabilities of the motor thus causing damage. Hence there is a need for operating range for a motor to work even in extreme conditions. Characteristics such as Speed, Torque, Power, operating voltage and current are important for selection of motors. Power is the capability of the motor to do some work. The motor characteristics at high speed are highly different from that to low speeds. The power of motors is very low at high speeds consuming very less of electric distribution. The shunt wound type of motors run basically at a constant speed, regardless of load. In industries the shunt wound motors are used where speed control is a critical aspect. The shunt wound motors are highly flexible, versatile and even the operation costs are minimum. Motors runs at certain speed depending on the shunt field and armature. The armature produces the back EMF to maintain a certain speed as the shaft rotates. The back EMF is produced when the rotor rotates. As the load increases it causes the armature shaft to slow down and in this case the back EMF produced will be decreased. There are two methods for controlling the speed of a motor. The first one is by increasing or decreasing the voltage supply to the field. If less voltage is given the motor runs at low speed and as the voltage is increased the speed increases accordingly. The other method is by inserting resistance in the field circuit which makes the speed to vary upon changing the load. When load is increased apparently speed is decreased and vice versa. The change in load and speed torque and power can be acquired with the Software designed for acquisition and data analysis which is LabVIEW. LABVIEW Lab view in short is for Laboratory Virtual Instrument Engineering Workbench. Labview is a very powerful and flexible instrumentation and analysis software developed by National Instruments. Labview is a programme particularly developed for engineers and scientists working in automation industry and data analysis. The principle Labview works is the data flow. They are broken into wires and nodes. The inputs and outputs are considered a node. It has got the built in libraries for Data Acquisition, Instrument Control and data analysis. Data acquisition is to measure electrical or physical quantities such as voltage, current, temperature, pressure, or sound. PC-based data acquisition is a combination of hardware, application software, and pc for logging the data. Software is highly important to data acquisition systems. The reduction of hardware can be done if an effective software is designed. Data Acquisition software collects the data and displays the data. Ease in data analysis and presentation are the major reasons for using the computers in data acquisition . LabVIEW can acquire accurate and timely measurements for monitoring industrial and control system applications. LabVIEW quickly connects to number of industrial sensors which acquires data at very high speeds. The tools provided in the LabVIEW can perform advanced signal processing, frequency analysis, digital signal processing. LabVIEW can also be applied for machine vision, motion control, and machine condition monitoring In LabVIEW, the logic can be easily developed by using the drag drop graphical icons instead of writing lines of programs. Time taking programmes can be written in very short period using labview. This graphical language can be used in industrial applications to control instruments, build automated test systems, and acquire data virtually and many more. LITERATURE REVIEW The literature on fundamentals and applications of data acquisition, instrumentation, and control to engineering and technology is very extensive. Peter T lee conducted experiments based on the torque-speed characteristics of a motor with the help of mechanical design and 3-D using the computer. The computer simulation was drawn from a mechanical model. Upon implementing the above methods a conclusion has been made on the torque- speed characteristics of dc shunt motor. The maximum speed of the motor is at no load applying zero torque. The stall torque represents a point where the motor is at zero speed. Dynamic and steady state response mathematical models were designed. The torque meter is used to calculate the torque. The torque speed curve obtained is is bit nonlinear. The mechanical design produced had few constraints which led to the nonlinearity of the curves. As described by Comer in dc electric motor control systems series motors develop high torques at very low speeds when compared to shunt motors. For a given voltage the speed-torque characteristics show a linear decrease with the speed. Motor speed is controlled by controlling the voltage to the armature which involves construction of a circuit involving inverter amplifier, opamps, pulse width modulator which is confusing and rather time taking. Saffet Ayasun proposed Matlab and Simpower systems for studying the steady state and transient characteristics of electrical machines. Simulink models have been designed to control the speed in three ways. Simulink has been proposed for field resistance control, armature resistance control and armature voltage control. The conclusions drawn from the simulink modelling is that the electrical machines are perfectly integrated with the software. Pierre Guillemin proposed a technique based on fuzzy logic for controlling a dc motor. His work included on motors in food processing industries whose speed varies upon load. He worked on designing the fuzzy logic for the speed to be constant even though theres a much change in the load. The main methodlogy is top control the voltage involving the techniques of phase angle modulation and pulse width modulation. Use of fuzzy logic avoided the need for mathematical modelling. Real time test and acquisition has been done using the pc and eprom version of ST6 device has been used for controlling the fuzzy logic. So the main disadvantage of using ST6 is that it needs pages of text coding and has a instruction list of 40./p> From the above proposed techniques we can conclude that it not only makes the system complicated but also it takes lot of time to design a program and create a logic for it to run. Manual way of operating may result in human errors decreasing the quality of product. Hence the need for data acquisition at high speed without much implementation of hardware components can be possible with the help of virtual instrumentation. Virtual instrumentation is the combination of modular software and I/O with software as its main tool. Today in any type of computer aided manufacturing project work and laboratory tests, precision and reliability of instrumentation and data acquisition techniques may cause major impacts on results and outcomes. Therefore, there is a need to gain knowledge and skills to obtain any type of physical or virtual data on manufacturing, testing, measurement, and protection areas. METHODOLOGY The data has been acquired from a dynamometer motor system and is displayed on the pc for analysis involving a communication between hardware and software. The ADC card communicates between the systems with the help of a data cable. The conditioned signals are connected to the channels of the DAQ board. The hardware system is in conjunction with the PC running LabVIEW. LabVIEW contains front panel and the block diagram which displays the data acquired and further analysis can be done. The front panel and block diagram are responsible for the understanding of programming involved. CHAPTER-2 VIRTUAL INSTRUMENTATION Virtual Instrumentation is the combination of software, Input/Output hardware for the user desired applications. Sofware is the heart of Virtual Instrumentation. Instrumentation is basically divided into two types one is natural instrumentation and the other is Virtual Instrumentation. Natural instrumentation consists of hardware components and Virtual instrumentation is of Software with limited hardware components. The main difference between natural instrumentation and virtual instrumentation is that the software component of virtual instruments is more reliable and versatile when compared to the hardware components. TRADITIONAL INSTRUMENT VS VIRTUAL INSTRUMENT The above Fig shows the difference between natural Instrument and a Virtual Instruments. In natural instrument a embedded chip is fixed to do a particular job which is not flexible whereas in a virtual instrument software can be modified and used for different applications as per the requirement. LabVIEW Labview stands for Laboratory Virtual Instrument Engineering Workbench. LabView is a visual programming language from National Instruments. The graphical language is originally named G. LabVIEW is used for data acquisition, industrial automation and instrument control. The programs in labview are called as virtual instruments .The graphical language can be easily identified by visual identification which makes it very easier to understand. Labview programs are termed as virtual instruments as they generally look and work as the instruments. Labview comes with a mechanism which allows data to pass between front panel and the block diagram. Labview is used by engineers and scientists to develop the sophisticated measurement, test, analyse control systems using graphical icons and wires. Labview can integrate with thousands of hardware devices and numerous built libraries are provided for analysis and data visualisation DATAFLOW PROGRAMMING The programming language used in LabVIEW is called G which is termed as a dataflow language. Labview Programme execution is determined by the way the block diagram is structured. Drawing wires are used to connect different function nodes. The information is transferred through the wires. The program is executed as soon as the input is available. G program is capable of parallel execution. The dataflow completely defines the execution sequence, and can be fully controlled by the programmer. The execution sequence is perfectly defined in Labview as defined in some software languages. GRAPHICAL PROGRAMMING LabVIEW programs are called virtual instruments. Each VI has three components: Block diagram Front panel Connector pane. Data Flow is the principle for the VI execution. The VI are data driven whereas the normal text coding are instruction driven as specified by the programmer. When all the input data is available then the node starts executing and the processed data is supplied to the output terminals. The graphical language makes it very easier for the programmers in which virtual instruments can be dragged and dropped as per requirement. Stand alone applications can be built with the help of advanced labview development systems. The front panel serves as a user interface between the user and the pc. When front panel is dropped as a node onto the block diagram, the node inputs and outputs can be defined in with the help of connector pane. CHAPTER -3 DC SHUNT MOTOR A motor is a machine which converts electrical energy to mechanical or rotating energy. DC motors are basically divided into two types. Series motors and Shunt motor. Shunt Motor are the one in which the field is parallel to the load. In shunt motors the armature is mounted on the motor shaft. The rotating part in the dc motor is termed as the armature. The windings are located in the slots on the surface of the armature. When the current is supplied to the armature windings it creates a magnetic field that reacts with the field poles. Hence this magnetic field develops a torque which turn the rotor that is the armature. While the rotor rotates it induces a voltage which is opposite to the supplied voltage and hence emf is generated. At start the resistance is high and as the motor picks up the speed the resistance is reduced gradually. In manual start the resistance is controlled by the man at work whereas in automatic start of motor the armature voltage or current is taken into consideration and the resistance is corrected in the begging of start . The increase in armature voltage results in increase in speed and as the armature voltage is decreased the speed decreases. Torque is directly proportional to armature current. Increases in armature current causes the increase in torque.The rotation of the armature can be reversed by reversing the current direction. At start of the motor the current is high. As armature starts rotating the back emf increases gradually with the speed and the current decreases. When the speed of the armature comes to constant the back emf is stable approaching the induced voltage. If a mechanical load is applied the speed decreases and hence the counter emf decreases. This decreases in counter emf increases the differential voltage and thus increases the input current supply to motor. Torque is directly proportional to armature magnetic field strength. Armature magnetic field is directly proportional to armature current which in turn depends on mechanical load applied. Hence any increase in mechanical load increases the armature current and armature magnetic field strength and thus the Torque increases. Thus the speed of the motor decreases. DC motors are differentiated based on their voltage, torque, speed and power. TORQUE Torque is the rotating force of the shaft of a motor. This rotating force is developed due to the interaction of magnetic field between field windings and the field poles. The torque of a motor can be determined by connecting it to prony brake The torque in general terms is the force exerted by the shaft of a motor. i.e if force is applies to a lever which is free to rotate about one fixed point the lever will rotate unless restrained. The torque is defined as t=Fr or Frsin?. The torque which is produced in clockwise is called a clockwise torque and the torque which is obtained in anticlockwise is called anticlockwise torque. FULL LOAD TORQUE The continous torque motor can support without overheating under the specified time rating is full load torque. PEAK TORQUE Peak torque is the maximum torque required at any point. Peak torque is delivered to motor without much overheating the motor. Peak torque is normally less than the stall torque. PULL OUT TORQUE This is maximum torque of the rotating shaft when operated at high speed and full voltage. Pull out torque is also considered as the breakdown torque. STARTING TORQUE Torque exerted by the motor when energized at full voltage with its shaft locked is starting torque. It is also termed as locked rotor torque. SPEED The motors convert electrical energy into mechanical energy. The rotational energy is used to lift things, propel things, turn things, etc. When a specific voltage is supplied to a motor, it rotates the output shaft at a particular speed. The angular velocity, is measured in rad/s, rps, rpm. Speed of a shunt motor can be controlled in three ways. Field Control Method Armature Control Method Armature Voltage Control method FIELD CONTROL METHOD In field control method the speed of the armature is controlled by adjusting the field current. upto certain speed the counter emf and the speed remains constant. Field Control method is also termed as constant speed drive. ARMATURE RESISTANCE CONTROL In Armature resistance control external resistance is inserted in the armature circuit for controlling the speed of motor. The insertion of resistance keeps the armature current constant in certain speed range. The main disadvantages using this techniques include powerloss in external resistance and overall low efficiency when speed is reduced to great extent. ARMATURE VOLTAGE CONTROL Armature voltage control is preferred over the other methods as powerloss and low efficiency is avoided. In this method the shunt field current is kept constant while varying the armature voltage. Hence the armature current and the flux generated remains constant. At certain current the torque remains constant since armature current is directly proportional to torque. Thus the speed of the motor can be controlled to certain range. SPEED REGULATION The speed regulation for a dc motor is the ratio of change in speed from no load to full loadf load speed. POWER The power of a motor is defined as the capability of motor to do given amount of work.Power of a motor depends on torque, speed of the shaft and the amount of time the time operates. Electric motors are rated generally on their maximum efficiency. Thus Greater the horse power of a motor greater is the working range. Operation of a motor more than rated horse power leads to overheating of the motor thus causing a stall. This may even damage the motor in the long run. The power of motor can be determined by connecting it to a dynamometer. DYNAMOMETER Dynamometer is a device which measures force and power. Eddy current Dynamometer consists of a stator in which electromagnets and rotor disc are coupled to shaft of the engine .When a rotor is made to rotate the eddy currents are produced in the stator due to magnetic flux which is created by the filed current in electromagnets. This type of dynamometers requires some cooling arrangement as the eddy currents produced dissipates heat energy. The moment arm is used to measure the torque. In this kind of dynamometers the load is controlled by the regulation of currents in electromagnetic fields. Design Cycle The selection of appropriate hardware and software was an essential part of this project. The first section of this chapter 4 gives the information of hardware components of a system, the diagrams and specifications are discussed .The second part of this chapter describes the hardware design process and software is described in the third section ,code used for the system are going to be presented. CHAPTER 4 EXPERIMENTAL SETUP DC SHUNT MOTOR-WORKING The DC motor has two basic parts: The choosen shunt Dc motor is the motor which converts electrical power to mechanical power. The shunt motor is different from that of series motor. In the shunt type dc motor field winding is connected in parallel with the armature. The field winding is parallel to armature and this is referred as shunt winding and the motor is called a shunt motor. The rated rpm of the motor is 1500. The speed of the motor can be increased or decreased with the help of a drive. The current can be increased or decreased to set the speed. To reduce the speed of the motor mechanical load can be applied. Torque can be applied to reduce the speed of the motor. Under loaded conditions the speed of the motor reduces. Motor can be applied until it reaches the rated torque of the motor. If the load goes beyond the rated torque it starts drawing high curent and after some time it comes to stall. CHARACTERISTICS OF SHUNT MOTOR Shunt motors run at constant speed even when there is huge variation in the load. The Speed of the shunt-wound motors may be regulated in two ways. The first way is by putting resistance in series with the armature, through which the speed is decreased and the second method is by inserting resistance in the field by which the speed will vary as the motor is loaded. The characteristics of a shunt-wound motor is that it has a very good speed regulation, and is aconstant speed motor, though the speed slightly decreases as load is increased. Shunt-wound motors are used mostly in industrial and automotive applications where accurate measurement of Torque, Speed are highly necessary. EDDY CURRENT DYNAMOMETER A dynamometer is a device used to load the motor which also indicates the torque. The dynamometer used in this project works on hysteresis brake principle. The dynamometer system mainly consists of three parts: Dynamometer Torque indicator Power Supply Eddy current dynamometers are the actuated braking systems. This braking system develops load torque with the interaction from the dc magnetic field produced by the windings on the stator and induced eddy currents in the rotor. When the magnetic field is added around the rotor it causes eddy currents. These eddy currents help in slowing down the speed. Dynamometer01CJC.svg The torque developed in the dynamometer is transmitted to the stator which is free to rotate over an arc and this is used to deflect a spring balance and so the torque can be directly measured on a scale. Eddy current dynamometer comes with a rotary potentiometer which works on the principle ROTARY POTENTIOMETER Rotary potentiometers come with a spiral resistive strip, and a wiper which moves axially as it rotates. As the wiper moves across the resistive strip resistance changes. VOLTAGE DIVIDER The voltage divider is used to know the output voltage when input voltage is given across the resistance. The ouput voltage depends upon the input voltage given and the resistor chosen. The resistor choosen is 10k? and an input voltage of 5v is given to the voltage divider. VOLTAGE DIVIDER The input voltage is given across the termicals 1 and 2 and the output voltage is taken across the terminals 2 and 3. Connect the voltmeter across the resistance . Now switch the output voltage off and manipulate the input voltage to 5v. Now switch on the output toggle button on . The input voltage is set to 5v. AC TACHOMETER: Tachometers are used to measure the angular speed of a rotating shaft. The speed is measured in revolutions per minute (rpm). A tachometer works on the principle that it the speed of rotating shaft is determined by the variation in output frequency signal or voltage. As the speed increases the voltage level and the frequency increases. CONTACT TYPE AC TACHOMETER The above fig shows the tachometer coupled to the motor. Ac tachometer used in the design is rated at 0.5v/100rpm. It shows that increase in speed increases. For every 100rpm variation the voltage increases by 0.5 rpm. The voltage signal from the ac tachometer is given to the simple presicion rectifier which further converts the signal to dc voltage. SIMPLE PRECISION FULL WAVE RECTIFIER A simple precision full wave rectifier converts the ac voltage to dc voltage. The simple precision full wave rectifier is built with operation amplifier which works on the principle of differential voltage. An operational amplifier is a DC-coupled high-gain electronic voltage amplifier which has differential inputs and a single output. Negative feed back controls the gain in the opamps. The output goes positive when the non inverting input(+) goes more positive than the inverting input (-) and vice versa When the input signal goes positive again, the op amps output voltage will take time to go back to zero, then to forward bias the diode and produce an output. The time taken is determined by the opamps slew rate. Slew rate is the maximum attainable range of the output voltage. Slew rate limits the highest frequency of the sin wave. The opamp 741 choosen in the project has a slew rate of 0.5v per micro seconds SIMPLE PRECISION FULL WAVE RECTIFIER The negative voltage at the input through the diode and resistor. The positive half cycles appear at the output of the second diode. When positive voltage is given the feed back is given by the diodes and hence negative cycles . The positive cycles and negative cycles are summed differentially to get the output voltage. The opamp 741 choosen in the project has a slew rate of 0.5v per micro seconds For measurement applications the signal has to be ripple free. Hence low pass filter can be used to achieve the signal free from ripples. RC LOW PASS FILTER Resistor Capacitance generally termed as RC circuits are used in filtering a signal waveform, thus changing the relative amounts of high frequency and low information in their output signals compared to their input signals. RC filter is a common application for smoothing a signal. The RC circuit has a capacitor and a resistor in which are connected in series. The charged capacitor would discharge its energy into the resistor placed in series with it. This voltage across the capacitor is found through Kirchhoffs current law which says that the current coming from capacitor is equal the current flowing out through the resistor. The linear differential eqn. can be given by ANALOG TO DIGITAL CARD Analog to Digital conversion is interfacinf the analog I/O with the Digital I/O. ADC cnversion takes place in three stages. They are Sampling, Quantisation and encoding. The ADC card which is used in the Project is CIO-DASO8/JR-A0. SAMPLING The analog input cannot be directly sent to the pc. The ADC digitises the analog input signal continusly. The proper reconstruction of signal is possible only when the sampling rate is twice the highest frequency component. If the sampling rate is under that the problem of Alaising occurs. To eleminate the problems of aliasing the signal must be sampled at a rate higher than Nyquist frequency rate. The fig shows the sampling rates and the construction of the signal. If a signal is sampled at too low rate perfect reconstruction of signal is nt possible which results in the loss of data. QUANTISATION Quantisation represents the signal in discrete and certainj voltage levels. Quantisation actually is approximating the signals to the lowest possible range. The fig below shows the sampling of a singal which is then quatises indicated by a red line. The quantization is necessary as during the sampling the small range of signals may not be digitised. This results in loss of information. By approximating the values the reconstruction of signal is perfect. CODING Coding is the process of converting the sampled signals to n bits which are represented by 0 and 1s. These bits represent certain voltage levels which is given by the resolution. SPECIFICATIONS When acquiring data to a computer, an analog to digital Conveter takes an analog signal and digitises the signal. The sigal is digitised to sertain binary numbers. These binary numbers represents respective voltage levels. Resolution refers to the number of binary levels ADC can represent a signal. The resolution of a n bit ADC can be by taking the value . The ADC card which is used in the Project is CIO-DASO8/JR-A0. DATA ACQUISITION AND CONTROL ARCHITECTURE Data acquisition and cntrol architectlog input is given to the pc via ADC which converts the analog input to digital input. The data can be transmitted bidirectionally with the help of data acquisition device. Labview Software is loaded in the pc which acquires the data with the help of built in libraraies. INSTACAL Instacal is software which manages the data acquisition hardware. It is used in calibration of the boards attached. It scans all the internal registers and the electronic equipment and if any fault found error messages are shown. The ADC is calibrated with the help of instacal to check whether the data logger is accurate or not. CHAPTER 5 LABVIEW Labview environment is opened by when new VI is selected from the start up screen. The file menu contains commands for file manipulations. Edit menu is used to modify the block diagram and front panel objects. By default the undo or redo settings for a VI are 8. It can be manipulated as per the requirement. Operate menu acts in running or stopping a VI or to change the settings of VI. The tools menu acts as interface in communicating with the data acquisition boards to build the applications and in enabling the web server. WINDOW INTRODUCTION Labview programming is mainly divided into two panels. The first one is the Front Panel and all the controls and indicators are in l PC Monitoring of Dynamometer PC Monitoring of Dynamometer ABSTRACT The aim of the project PC MONITORING OF DYNAMOMETER is to measure and display the Speed Torque and Power of Motor. The behaviour of motor under load and no load characteristics have been studied with the help of virtual instrumentation. The variations in the motor Speed, Torque and Power at no load torque and full load torque have been analysed. Power determines the efficiency of the motor. Torque is varied by altering resistance in the dynamometer control circuit. The entire system will interface with a PC providing virtual instrumentation and data logging facilities. The graphical programming software has been used to study the characteristics of the motor by loading. Data logging and analysis is done by implementing the concept of LabVIEW. AIMS The aim of the project to build and develop the LabVIEW Program to acquire and analyse the data with the help of ADC card. Speed, Torque and Power of the shunt wound dc motor are acquired and analysed. OBJECTIVES Implement the concept of virtual instrumentation. Develop LabVIEW program to acquire Torque, Speed and Power. Analyse the motor characteristics under load and no load using the visual programming. To show the difference between acquiring the data manually and applying Virtual Instrumentation. Chapter 1 gives the introduction to the Motors, Labview and the literature review to realise the project. Chapter 2 is the study of Virtual Instrumentation and Labview programming. Chapter 3 explains the terms Torque, Speed Power asscociated with the shunt motor. Chapter 4 includes the experimental setup for the project with the specifications and the individual work of each and every component. Chapter 5 discussion part includes the introduction to LabVIEW tools used in the programming for the project. Chapter 6 contains the analysis for the manual operation of the motor when load is applied. Includes Torque, Speed, and Voltage characteristics. Chapter 7 includes the labview program for Speed, Torque and Power with the analysis for motor under loaded conditions. Chapter 8 includes the conclusions and the future scope of the project. CHAPTER-1 INTRODUCTION The extent to which electrical energy is used has influence on the development of industry and the economic prosperity of nation. Therefore rather than conserving the energy, methods need to be implemented to control the electrical energy and hence it can be possible only when the problems associated with the system are analysed and rectified with use of technology and time limitation. In industries the shunt wound motors are used where speed control is a critical aspect. The shunt wound motors are highly flexible, versatile and even the operation costs are minimum. The speed of rollers in large rolling mills is an very important aspect to be measured. In this type of application the rpm of each motor is measured and compared to setpoints. Under load motors draw more current which may damage the working capabilities of the motor thus causing damage. Hence there is a need for operating range for a motor to work even in extreme conditions. Characteristics such as Speed, Torque, Power, operating voltage and current are important for selection of motors. Power is the capability of the motor to do some work. The motor characteristics at high speed are highly different from that to low speeds. The power of motors is very low at high speeds consuming very less of electric distribution. The shunt wound type of motors run basically at a constant speed, regardless of load. In industries the shunt wound motors are used where speed control is a critical aspect. The shunt wound motors are highly flexible, versatile and even the operation costs are minimum. Motors runs at certain speed depending on the shunt field and armature. The armature produces the back EMF to maintain a certain speed as the shaft rotates. The back EMF is produced when the rotor rotates. As the load increases it causes the armature shaft to slow down and in this case the back EMF produced will be decreased. There are two methods for controlling the speed of a motor. The first one is by increasing or decreasing the voltage supply to the field. If less voltage is given the motor runs at low speed and as the voltage is increased the speed increases accordingly. The other method is by inserting resistance in the field circuit which makes the speed to vary upon changing the load. When load is increased apparently speed is decreased and vice versa. The change in load and speed torque and power can be acquired with the Software designed for acquisition and data analysis which is LabVIEW. LABVIEW Lab view in short is for Laboratory Virtual Instrument Engineering Workbench. Labview is a very powerful and flexible instrumentation and analysis software developed by National Instruments. Labview is a programme particularly developed for engineers and scientists working in automation industry and data analysis. The principle Labview works is the data flow. They are broken into wires and nodes. The inputs and outputs are considered a node. It has got the built in libraries for Data Acquisition, Instrument Control and data analysis. Data acquisition is to measure electrical or physical quantities such as voltage, current, temperature, pressure, or sound. PC-based data acquisition is a combination of hardware, application software, and pc for logging the data. Software is highly important to data acquisition systems. The reduction of hardware can be done if an effective software is designed. Data Acquisition software collects the data and displays the data. Ease in data analysis and presentation are the major reasons for using the computers in data acquisition . LabVIEW can acquire accurate and timely measurements for monitoring industrial and control system applications. LabVIEW quickly connects to number of industrial sensors which acquires data at very high speeds. The tools provided in the LabVIEW can perform advanced signal processing, frequency analysis, digital signal processing. LabVIEW can also be applied for machine vision, motion control, and machine condition monitoring In LabVIEW, the logic can be easily developed by using the drag drop graphical icons instead of writing lines of programs. Time taking programmes can be written in very short period using labview. This graphical language can be used in industrial applications to control instruments, build automated test systems, and acquire data virtually and many more. LITERATURE REVIEW The literature on fundamentals and applications of data acquisition, instrumentation, and control to engineering and technology is very extensive. Peter T lee conducted experiments based on the torque-speed characteristics of a motor with the help of mechanical design and 3-D using the computer. The computer simulation was drawn from a mechanical model. Upon implementing the above methods a conclusion has been made on the torque- speed characteristics of dc shunt motor. The maximum speed of the motor is at no load applying zero torque. The stall torque represents a point where the motor is at zero speed. Dynamic and steady state response mathematical models were designed. The torque meter is used to calculate the torque. The torque speed curve obtained is is bit nonlinear. The mechanical design produced had few constraints which led to the nonlinearity of the curves. As described by Comer in dc electric motor control systems series motors develop high torques at very low speeds when compared to shunt motors. For a given voltage the speed-torque characteristics show a linear decrease with the speed. Motor speed is controlled by controlling the voltage to the armature which involves construction of a circuit involving inverter amplifier, opamps, pulse width modulator which is confusing and rather time taking. Saffet Ayasun proposed Matlab and Simpower systems for studying the steady state and transient characteristics of electrical machines. Simulink models have been designed to control the speed in three ways. Simulink has been proposed for field resistance control, armature resistance control and armature voltage control. The conclusions drawn from the simulink modelling is that the electrical machines are perfectly integrated with the software. Pierre Guillemin proposed a technique based on fuzzy logic for controlling a dc motor. His work included on motors in food processing industries whose speed varies upon load. He worked on designing the fuzzy logic for the speed to be constant even though theres a much change in the load. The main methodlogy is top control the voltage involving the techniques of phase angle modulation and pulse width modulation. Use of fuzzy logic avoided the need for mathematical modelling. Real time test and acquisition has been done using the pc and eprom version of ST6 device has been used for controlling the fuzzy logic. So the main disadvantage of using ST6 is that it needs pages of text coding and has a instruction list of 40./p> From the above proposed techniques we can conclude that it not only makes the system complicated but also it takes lot of time to design a program and create a logic for it to run. Manual way of operating may result in human errors decreasing the quality of product. Hence the need for data acquisition at high speed without much implementation of hardware components can be possible with the help of virtual instrumentation. Virtual instrumentation is the combination of modular software and I/O with software as its main tool. Today in any type of computer aided manufacturing project work and laboratory tests, precision and reliability of instrumentation and data acquisition techniques may cause major impacts on results and outcomes. Therefore, there is a need to gain knowledge and skills to obtain any type of physical or virtual data on manufacturing, testing, measurement, and protection areas. METHODOLOGY The data has been acquired from a dynamometer motor system and is displayed on the pc for analysis involving a communication between hardware and software. The ADC card communicates between the systems with the help of a data cable. The conditioned signals are connected to the channels of the DAQ board. The hardware system is in conjunction with the PC running LabVIEW. LabVIEW contains front panel and the block diagram which displays the data acquired and further analysis can be done. The front panel and block diagram are responsible for the understanding of programming involved. CHAPTER-2 VIRTUAL INSTRUMENTATION Virtual Instrumentation is the combination of software, Input/Output hardware for the user desired applications. Sofware is the heart of Virtual Instrumentation. Instrumentation is basically divided into two types one is natural instrumentation and the other is Virtual Instrumentation. Natural instrumentation consists of hardware components and Virtual instrumentation is of Software with limited hardware components. The main difference between natural instrumentation and virtual instrumentation is that the software component of virtual instruments is more reliable and versatile when compared to the hardware components. TRADITIONAL INSTRUMENT VS VIRTUAL INSTRUMENT The above Fig shows the difference between natural Instrument and a Virtual Instruments. In natural instrument a embedded chip is fixed to do a particular job which is not flexible whereas in a virtual instrument software can be modified and used for different applications as per the requirement. LabVIEW Labview stands for Laboratory Virtual Instrument Engineering Workbench. LabView is a visual programming language from National Instruments. The graphical language is originally named G. LabVIEW is used for data acquisition, industrial automation and instrument control. The programs in labview are called as virtual instruments .The graphical language can be easily identified by visual identification which makes it very easier to understand. Labview programs are termed as virtual instruments as they generally look and work as the instruments. Labview comes with a mechanism which allows data to pass between front panel and the block diagram. Labview is used by engineers and scientists to develop the sophisticated measurement, test, analyse control systems using graphical icons and wires. Labview can integrate with thousands of hardware devices and numerous built libraries are provided for analysis and data visualisation DATAFLOW PROGRAMMING The programming language used in LabVIEW is called G which is termed as a dataflow language. Labview Programme execution is determined by the way the block diagram is structured. Drawing wires are used to connect different function nodes. The information is transferred through the wires. The program is executed as soon as the input is available. G program is capable of parallel execution. The dataflow completely defines the execution sequence, and can be fully controlled by the programmer. The execution sequence is perfectly defined in Labview as defined in some software languages. GRAPHICAL PROGRAMMING LabVIEW programs are called virtual instruments. Each VI has three components: Block diagram Front panel Connector pane. Data Flow is the principle for the VI execution. The VI are data driven whereas the normal text coding are instruction driven as specified by the programmer. When all the input data is available then the node starts executing and the processed data is supplied to the output terminals. The graphical language makes it very easier for the programmers in which virtual instruments can be dragged and dropped as per requirement. Stand alone applications can be built with the help of advanced labview development systems. The front panel serves as a user interface between the user and the pc. When front panel is dropped as a node onto the block diagram, the node inputs and outputs can be defined in with the help of connector pane. CHAPTER -3 DC SHUNT MOTOR A motor is a machine which converts electrical energy to mechanical or rotating energy. DC motors are basically divided into two types. Series motors and Shunt motor. Shunt Motor are the one in which the field is parallel to the load. In shunt motors the armature is mounted on the motor shaft. The rotating part in the dc motor is termed as the armature. The windings are located in the slots on the surface of the armature. When the current is supplied to the armature windings it creates a magnetic field that reacts with the field poles. Hence this magnetic field develops a torque which turn the rotor that is the armature. While the rotor rotates it induces a voltage which is opposite to the supplied voltage and hence emf is generated. At start the resistance is high and as the motor picks up the speed the resistance is reduced gradually. In manual start the resistance is controlled by the man at work whereas in automatic start of motor the armature voltage or current is taken into consideration and the resistance is corrected in the begging of start . The increase in armature voltage results in increase in speed and as the armature voltage is decreased the speed decreases. Torque is directly proportional to armature current. Increases in armature current causes the increase in torque.The rotation of the armature can be reversed by reversing the current direction. At start of the motor the current is high. As armature starts rotating the back emf increases gradually with the speed and the current decreases. When the speed of the armature comes to constant the back emf is stable approaching the induced voltage. If a mechanical load is applied the speed decreases and hence the counter emf decreases. This decreases in counter emf increases the differential voltage and thus increases the input current supply to motor. Torque is directly proportional to armature magnetic field strength. Armature magnetic field is directly proportional to armature current which in turn depends on mechanical load applied. Hence any increase in mechanical load increases the armature current and armature magnetic field strength and thus the Torque increases. Thus the speed of the motor decreases. DC motors are differentiated based on their voltage, torque, speed and power. TORQUE Torque is the rotating force of the shaft of a motor. This rotating force is developed due to the interaction of magnetic field between field windings and the field poles. The torque of a motor can be determined by connecting it to prony brake The torque in general terms is the force exerted by the shaft of a motor. i.e if force is applies to a lever which is free to rotate about one fixed point the lever will rotate unless restrained. The torque is defined as t=Fr or Frsin?. The torque which is produced in clockwise is called a clockwise torque and the torque which is obtained in anticlockwise is called anticlockwise torque. FULL LOAD TORQUE The continous torque motor can support without overheating under the specified time rating is full load torque. PEAK TORQUE Peak torque is the maximum torque required at any point. Peak torque is delivered to motor without much overheating the motor. Peak torque is normally less than the stall torque. PULL OUT TORQUE This is maximum torque of the rotating shaft when operated at high speed and full voltage. Pull out torque is also considered as the breakdown torque. STARTING TORQUE Torque exerted by the motor when energized at full voltage with its shaft locked is starting torque. It is also termed as locked rotor torque. SPEED The motors convert electrical energy into mechanical energy. The rotational energy is used to lift things, propel things, turn things, etc. When a specific voltage is supplied to a motor, it rotates the output shaft at a particular speed. The angular velocity, is measured in rad/s, rps, rpm. Speed of a shunt motor can be controlled in three ways. Field Control Method Armature Control Method Armature Voltage Control method FIELD CONTROL METHOD In field control method the speed of the armature is controlled by adjusting the field current. upto certain speed the counter emf and the speed remains constant. Field Control method is also termed as constant speed drive. ARMATURE RESISTANCE CONTROL In Armature resistance control external resistance is inserted in the armature circuit for controlling the speed of motor. The insertion of resistance keeps the armature current constant in certain speed range. The main disadvantages using this techniques include powerloss in external resistance and overall low efficiency when speed is reduced to great extent. ARMATURE VOLTAGE CONTROL Armature voltage control is preferred over the other methods as powerloss and low efficiency is avoided. In this method the shunt field current is kept constant while varying the armature voltage. Hence the armature current and the flux generated remains constant. At certain current the torque remains constant since armature current is directly proportional to torque. Thus the speed of the motor can be controlled to certain range. SPEED REGULATION The speed regulation for a dc motor is the ratio of change in speed from no load to full loadf load speed. POWER The power of a motor is defined as the capability of motor to do given amount of work.Power of a motor depends on torque, speed of the shaft and the amount of time the time operates. Electric motors are rated generally on their maximum efficiency. Thus Greater the horse power of a motor greater is the working range. Operation of a motor more than rated horse power leads to overheating of the motor thus causing a stall. This may even damage the motor in the long run. The power of motor can be determined by connecting it to a dynamometer. DYNAMOMETER Dynamometer is a device which measures force and power. Eddy current Dynamometer consists of a stator in which electromagnets and rotor disc are coupled to shaft of the engine .When a rotor is made to rotate the eddy currents are produced in the stator due to magnetic flux which is created by the filed current in electromagnets. This type of dynamometers requires some cooling arrangement as the eddy currents produced dissipates heat energy. The moment arm is used to measure the torque. In this kind of dynamometers the load is controlled by the regulation of currents in electromagnetic fields. Design Cycle The selection of appropriate hardware and software was an essential part of this project. The first section of this chapter 4 gives the information of hardware components of a system, the diagrams and specifications are discussed .The second part of this chapter describes the hardware design process and software is described in the third section ,code used for the system are going to be presented. CHAPTER 4 EXPERIMENTAL SETUP DC SHUNT MOTOR-WORKING The DC motor has two basic parts: The choosen shunt Dc motor is the motor which converts electrical power to mechanical power. The shunt motor is different from that of series motor. In the shunt type dc motor field winding is connected in parallel with the armature. The field winding is parallel to armature and this is referred as shunt winding and the motor is called a shunt motor. The rated rpm of the motor is 1500. The speed of the motor can be increased or decreased with the help of a drive. The current can be increased or decreased to set the speed. To reduce the speed of the motor mechanical load can be applied. Torque can be applied to reduce the speed of the motor. Under loaded conditions the speed of the motor reduces. Motor can be applied until it reaches the rated torque of the motor. If the load goes beyond the rated torque it starts drawing high curent and after some time it comes to stall. CHARACTERISTICS OF SHUNT MOTOR Shunt motors run at constant speed even when there is huge variation in the load. The Speed of the shunt-wound motors may be regulated in two ways. The first way is by putting resistance in series with the armature, through which the speed is decreased and the second method is by inserting resistance in the field by which the speed will vary as the motor is loaded. The characteristics of a shunt-wound motor is that it has a very good speed regulation, and is aconstant speed motor, though the speed slightly decreases as load is increased. Shunt-wound motors are used mostly in industrial and automotive applications where accurate measurement of Torque, Speed are highly necessary. EDDY CURRENT DYNAMOMETER A dynamometer is a device used to load the motor which also indicates the torque. The dynamometer used in this project works on hysteresis brake principle. The dynamometer system mainly consists of three parts: Dynamometer Torque indicator Power Supply Eddy current dynamometers are the actuated braking systems. This braking system develops load torque with the interaction from the dc magnetic field produced by the windings on the stator and induced eddy currents in the rotor. When the magnetic field is added around the rotor it causes eddy currents. These eddy currents help in slowing down the speed. Dynamometer01CJC.svg The torque developed in the dynamometer is transmitted to the stator which is free to rotate over an arc and this is used to deflect a spring balance and so the torque can be directly measured on a scale. Eddy current dynamometer comes with a rotary potentiometer which works on the principle ROTARY POTENTIOMETER Rotary potentiometers come with a spiral resistive strip, and a wiper which moves axially as it rotates. As the wiper moves across the resistive strip resistance changes. VOLTAGE DIVIDER The voltage divider is used to know the output voltage when input voltage is given across the resistance. The ouput voltage depends upon the input voltage given and the resistor chosen. The resistor choosen is 10k? and an input voltage of 5v is given to the voltage divider. VOLTAGE DIVIDER The input voltage is given across the termicals 1 and 2 and the output voltage is taken across the terminals 2 and 3. Connect the voltmeter across the resistance . Now switch the output voltage off and manipulate the input voltage to 5v. Now switch on the output toggle button on . The input voltage is set to 5v. AC TACHOMETER: Tachometers are used to measure the angular speed of a rotating shaft. The speed is measured in revolutions per minute (rpm). A tachometer works on the principle that it the speed of rotating shaft is determined by the variation in output frequency signal or voltage. As the speed increases the voltage level and the frequency increases. CONTACT TYPE AC TACHOMETER The above fig shows the tachometer coupled to the motor. Ac tachometer used in the design is rated at 0.5v/100rpm. It shows that increase in speed increases. For every 100rpm variation the voltage increases by 0.5 rpm. The voltage signal from the ac tachometer is given to the simple presicion rectifier which further converts the signal to dc voltage. SIMPLE PRECISION FULL WAVE RECTIFIER A simple precision full wave rectifier converts the ac voltage to dc voltage. The simple precision full wave rectifier is built with operation amplifier which works on the principle of differential voltage. An operational amplifier is a DC-coupled high-gain electronic voltage amplifier which has differential inputs and a single output. Negative feed back controls the gain in the opamps. The output goes positive when the non inverting input(+) goes more positive than the inverting input (-) and vice versa When the input signal goes positive again, the op amps output voltage will take time to go back to zero, then to forward bias the diode and produce an output. The time taken is determined by the opamps slew rate. Slew rate is the maximum attainable range of the output voltage. Slew rate limits the highest frequency of the sin wave. The opamp 741 choosen in the project has a slew rate of 0.5v per micro seconds SIMPLE PRECISION FULL WAVE RECTIFIER The negative voltage at the input through the diode and resistor. The positive half cycles appear at the output of the second diode. When positive voltage is given the feed back is given by the diodes and hence negative cycles . The positive cycles and negative cycles are summed differentially to get the output voltage. The opamp 741 choosen in the project has a slew rate of 0.5v per micro seconds For measurement applications the signal has to be ripple free. Hence low pass filter can be used to achieve the signal free from ripples. RC LOW PASS FILTER Resistor Capacitance generally termed as RC circuits are used in filtering a signal waveform, thus changing the relative amounts of high frequency and low information in their output signals compared to their input signals. RC filter is a common application for smoothing a signal. The RC circuit has a capacitor and a resistor in which are connected in series. The charged capacitor would discharge its energy into the resistor placed in series with it. This voltage across the capacitor is found through Kirchhoffs current law which says that the current coming from capacitor is equal the current flowing out through the resistor. The linear differential eqn. can be given by ANALOG TO DIGITAL CARD Analog to Digital conversion is interfacinf the analog I/O with the Digital I/O. ADC cnversion takes place in three stages. They are Sampling, Quantisation and encoding. The ADC card which is used in the Project is CIO-DASO8/JR-A0. SAMPLING The analog input cannot be directly sent to the pc. The ADC digitises the analog input signal continusly. The proper reconstruction of signal is possible only when the sampling rate is twice the highest frequency component. If the sampling rate is under that the problem of Alaising occurs. To eleminate the problems of aliasing the signal must be sampled at a rate higher than Nyquist frequency rate. The fig shows the sampling rates and the construction of the signal. If a signal is sampled at too low rate perfect reconstruction of signal is nt possible which results in the loss of data. QUANTISATION Quantisation represents the signal in discrete and certainj voltage levels. Quantisation actually is approximating the signals to the lowest possible range. The fig below shows the sampling of a singal which is then quatises indicated by a red line. The quantization is necessary as during the sampling the small range of signals may not be digitised. This results in loss of information. By approximating the values the reconstruction of signal is perfect. CODING Coding is the process of converting the sampled signals to n bits which are represented by 0 and 1s. These bits represent certain voltage levels which is given by the resolution. SPECIFICATIONS When acquiring data to a computer, an analog to digital Conveter takes an analog signal and digitises the signal. The sigal is digitised to sertain binary numbers. These binary numbers represents respective voltage levels. Resolution refers to the number of binary levels ADC can represent a signal. The resolution of a n bit ADC can be by taking the value . The ADC card which is used in the Project is CIO-DASO8/JR-A0. DATA ACQUISITION AND CONTROL ARCHITECTURE Data acquisition and cntrol architectlog input is given to the pc via ADC which converts the analog input to digital input. The data can be transmitted bidirectionally with the help of data acquisition device. Labview Software is loaded in the pc which acquires the data with the help of built in libraraies. INSTACAL Instacal is software which manages the data acquisition hardware. It is used in calibration of the boards attached. It scans all the internal registers and the electronic equipment and if any fault found error messages are shown. The ADC is calibrated with the help of instacal to check whether the data logger is accurate or not. CHAPTER 5 LABVIEW Labview environment is opened by when new VI is selected from the start up screen. The file menu contains commands for file manipulations. Edit menu is used to modify the block diagram and front panel objects. By default the undo or redo settings for a VI are 8. It can be manipulated as per the requirement. Operate menu acts in running or stopping a VI or to change the settings of VI. The tools menu acts as interface in communicating with the data acquisition boards to build the applications and in enabling the web server. WINDOW INTRODUCTION Labview programming is mainly divided into two panels. The first one is the Front Panel and all the controls and indicators are in l

So long a letter :: essays research papers

Daniel Overmyer’s, Religions of China, discusses the historical developments of the different religions of China. It also addresses the impact religion has on the daily life of the Chinese in the past and present. Overmyer introduces the Chinese living system with his knowledge of Feng-shui, and how everything is connected by shared rhythms. â€Å"These rhythms are discussed as the cold, dark forces of yin and the hot, bright forces of yang; together with the five powers of metal, plant, life, water, fire and earth; these forces are modes of qi, â€Å"vital substance†. Their interaction produces all things† (12). The author does an excellent job in his approach to teaching Chinese religions and culture. He explains its concept and upbringings then tries to relate them to the reader’s daily life. This book serves as an introduction to Chinese History, in terms of religions and practices, which paved the way for China today. In order to help introduce the major cultural and religious features of the book, the author places a chronological list of events in the beginning of the text; from the Prehistoric time (6000 B.C.) to the Peoples Republic of China (1949-present). Its geographical limits are all of China, which extends from the Pacific Ocean to India to Afghanistan, and from Burma in the south to Siberia in the north. Overmyer gives a brief historical view of the country’s’ political and social climb, one example was with the decline of the Hans dynasty to the uprising of the Yellow Turbans then to Way of the Celestial Masters. â€Å"These two popular movements were also forerunners of Daoism, which became the most important religious tradition founded in China† (37). The presentation of the text is thematic and it provides the reader with a step by step analysis to religions and practices. The author presents the concept in a very organized fashion. The first chapter introduces the beliefs and values of China’s living system, with the concept of Feng-shui and qi. The next chapter gives a brief overview of the historical developments of the different religions; Daoism, Buddhism, Confucianism, Popular Religion, and Foreign Religion. The proceeding chapters include the traditions and practices in their religious life and also the community’s intervention with the spiritual life; i.e. The Spring Festival, Exorcism and the Buddhist Enlightenment. The last chapter, Chinese Religions Today, emphasizes on present day religion in Taiwan and China mainland. Overmyer is very knowledgeable in the subject matter, he was taught by his mother during his first 5 years living in China.

Communication Changes Essay

How did we arrive here? I ask that question after pondering the thought of how communication has changed just in my lifetime. I was born in 1970 in a small Idaho town. Party lines were still being used by most of my neighbors along our rural gravel road, and touch tone dialing wasn’t even thought of – at least not in my county. Two black and white televisions were in our household†¦one 14† in my parents’ room and a larger 19† in our family room. Cable tv? Not a chance. Four channels was all that was available, one of which was PBS – so unless Sesame Street was on, that didn’t count. That was just forty three years ago. Ouch. Writing that number makes it seem like a much longer time than it is, I still feel young. However looking back at all of the changes in the last four decades can be mind boggling. I watched new technology arrive and often thought â€Å"wow†¦.this is it, they  will never invent anything  that can outdo this!†. The touch tone phone, it allowed us to call someone so much faster than before. Soon after the VCR was the next best thing to come into our household and although not a communication device it would eventually evolve into an interactive communication tool. Communicating with someone in another town, state, or country was limited to either telephone or postal mail, which my grandparents at the time still commented on how amazing it was to be able to speak with someone on the other side of the planet. But it was expensive, very expensive. While brainstorming for this paper only a few methods of communication came to mind, oral, written, and electronic. During my research I found that communication technologies can be classified into eight different stages according to Walter Ong (Source: Theo 2011): 1. Orality (talking only)  2. Early Writing (pictorial writing then eventually phonetic alphabets, â€Å"craft literacy†, parchment). 3. Later Writing (scrolls then early bound books i.e. codices) 4. Early Print (Gutenberg and friends)  5. Later Print (the mass market begins) 6. Electric (Telegraph, Telephone) 7. Electronic (TV and radio) 8. Digital (Internet, cell phones) After initially reviewing this list I was astounded at how communication progress was extremely slow in the first five stages – consisting of tens of thousands of years between one stage to the next; however in my lifetime alone I have witnessed the last three stages evolve. I wonder, will this happen again? Will my son witness communication evolve three, four, five times in his lifetime? Or was this technology evolution an anomaly. Fast forward to current day, we have so many choices available to communicate with others it is often difficult to choose which method we want to use. Should I eMail my friend in San Francisco, call him using my house or cell phone, send him a text with an attachment of my wife and I’s wedding, or would he prefer a hand written card sent via the US Postal Service? Not only am I faced with which method works best for me in these situations but I also need to consider my recipient. It is generally very easy for adults to choose the appropriate method of communication however teenagers struggle more than ever. Often they will choose the simplest form of communication for their generation – texting. They even have their own new language while texting, SMS language or otherwise known as ‘textese’. This type of language is very similar to those used when the telegraph was in use over a hundred years earlier. The SMS language utilizes the fewest number of letters to produce words and sentiments in their correspondence, mostly driven by space, time and cost restraints.

Aladdin essays

Aladdin essays Fairytales have been around for a long time. Lots of the tales started out by word of mouth. People would tell one person and that person would tell another. The stories were altered a bit from each story being told. Finally, the tales were published in books, and soon seen on the big screen by Disney. Most of the introductions start out with once upon a time, many many years ago, and other sayings. Fairytales are based on using imaginary ideas with some truth throughout the story to tell a moral. Whoever you are, you have heard a fairytale from one time to another. People use these tales to relate to life and teach children. The fairytale Aladdin originates from The Thousand and One nights. These tales started in the year of 1000. The cohesive plot device concerns the efforts of Scheherezade to keep her husband, King Shahryar from killing her by entertaining him with a tale a night for 1,001 nights. The tales that were told range from Ali Baba, Sinbad the Sailor, and Ala ddin. The stories were set in India, but their origins are unknown and under scholarly investigation. From the thousand and one night tales, I believe that Aladdin has the best moral for teaching. Aladdin is poor with only the shirt on his back. He does not have any family or close friends except for his pet monkey. For this reason he is a people person, so he can survive in life. Being handsome and charming helps too. He has dark black shiny hair, big gorgeous eyes, and a smile that shines every time he talks. Aladdins lifestyle is basic. Therefore when the magic genie arrives with wishes, Aladdin is overwhelmed. He is an example of a young athlete going from the ghetto to the millions. His basic morals disappear. Aladdin getting the princess is the only thing on his mind. Nothing gets in the way of his task at hand. For example, he ditches his pet monkey while going after the princess. This monkey is the only one who ha ...

Free Essays on An Unconscious Friend

â€Å" ‘ Who the hell do you think you are’ Connie said. ‘Toldja I’d be out, didn’t I?’ ‘I don’t even know who you are.’ † (Oates 1227) Fear and uncertainty have come to fifteen-year-old Connie in the form of a â€Å"boy with shaggy black hair, in a convertible jalopy painted gold† (Oates 1225) in Joyce Carol Oates’ short story â€Å"Where Are You Going? Where Have You Been?† The boy, who readers learn is named Arnold Friend, comes to the insecure and culture-obsessed Connie one random Sunday afternoon and eventually uses his manipulative powers to lure Connie away from her home to meet an uncertain fate. Like Connie, readers find themselves wondering exactly who Arnold Friend is and what his role in the story means. Oates, when speaking about Friend, said that he is â€Å"a fantastic figure: he is Death, he is the ‘elf-knight’ of the ballads, he is the imagination, he is dream, he is a lover, a demon and all that† (Franco). As one can tell, Arnold’s meaning in the story is subject to debate. While some argue that Arnold Friend is a psychopathic killer or Satan inc arnate, he is actually a collection of Connie’s unconscious thoughts and desires in human form. Some readers have come to the conclusion that Arnold Friend is a psychopathic murderer who has come abduct Connie. This is most likely due to his character’s strong resemblance to real-life serial killer Charles Schmidbetter known as â€Å"The Pied Piper of Tucson.† Charles Howard Schmid Jr. acted out the same habitual behaviors exhibited by Arnold Friend in â€Å"Where Are You Going? Where Have You Been?† The fictitious Friend, like Schmid, keeps his â€Å"skin darkened to a deep tan with pancake make-up† (Moser 1225); he stuffs rags and tin cans into his shoes to make himself taller, and both Schmid and Arnold cruise around town in gold colored cars. Like Charles Schmid, Arnold Friend wears the make-up in order to conceal his real age. Schmid... Free Essays on An Unconscious Friend Free Essays on An Unconscious Friend â€Å" ‘ Who the hell do you think you are’ Connie said. ‘Toldja I’d be out, didn’t I?’ ‘I don’t even know who you are.’ † (Oates 1227) Fear and uncertainty have come to fifteen-year-old Connie in the form of a â€Å"boy with shaggy black hair, in a convertible jalopy painted gold† (Oates 1225) in Joyce Carol Oates’ short story â€Å"Where Are You Going? Where Have You Been?† The boy, who readers learn is named Arnold Friend, comes to the insecure and culture-obsessed Connie one random Sunday afternoon and eventually uses his manipulative powers to lure Connie away from her home to meet an uncertain fate. Like Connie, readers find themselves wondering exactly who Arnold Friend is and what his role in the story means. Oates, when speaking about Friend, said that he is â€Å"a fantastic figure: he is Death, he is the ‘elf-knight’ of the ballads, he is the imagination, he is dream, he is a lover, a demon and all that† (Franco). As one can tell, Arnold’s meaning in the story is subject to debate. While some argue that Arnold Friend is a psychopathic killer or Satan inc arnate, he is actually a collection of Connie’s unconscious thoughts and desires in human form. Some readers have come to the conclusion that Arnold Friend is a psychopathic murderer who has come abduct Connie. This is most likely due to his character’s strong resemblance to real-life serial killer Charles Schmidbetter known as â€Å"The Pied Piper of Tucson.† Charles Howard Schmid Jr. acted out the same habitual behaviors exhibited by Arnold Friend in â€Å"Where Are You Going? Where Have You Been?† The fictitious Friend, like Schmid, keeps his â€Å"skin darkened to a deep tan with pancake make-up† (Moser 1225); he stuffs rags and tin cans into his shoes to make himself taller, and both Schmid and Arnold cruise around town in gold colored cars. Like Charles Schmid, Arnold Friend wears the make-up in order to conceal his real age. Schmid...

Reciprocation vs. Reciprocity

Reciprocation vs. Reciprocity Reciprocation vs. Reciprocity Reciprocation vs. Reciprocity By Mark Nichol What’s the difference between reciprocation and reciprocity? The distinction is fine but useful. Both reciprocation and reciprocity mean â€Å"an act of return or requiting†; when one reciprocates, one responds to an action or a gesture by doing the same thing or something equivalent in form or value. These words stem from the Latin term reciprocus; the verb form, reciprocare, means â€Å"move or turn back,† â€Å"rise and fall,† or â€Å"come and go, move back and forth.† Reciprocation stems directly from Latin, while reciprocity is derived from the intermediate French term rà ©ciprocità ©. The difference is that reciprocation connotes a more intimate, personal exchange, while reciprocity refers to a more formal situation, such as a political or social agreement or contract: When a person returns a favor, he or she engages in reciprocation; when two countries adhere to an agreement to exchange similar privileges or products, they are practicing reciprocity. The adjective reciprocal refers to complementary actions by two parties (or one such action), but the word is also a noun meaning â€Å"something reciprocal to something else,† including one of a pair of numbers that, when multiplied, produce a product of 1 (such as 4 and 1/4). The verb form is reciprocate, the adverbial form is reciprocally, and the adjectival form is reciprocating. (For example, a reciprocating saw is a powered saw with a blade that moves back and forth so that the operator need only hold the tool while the motor makes the saw do the work.) Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Misused Words category, check our popular posts, or choose a related post below:Bare or Bear With Me?Homogeneous vs. HeterogeneousPlurals of Proper Names

HS630 week 9 conference Essay Example | Topics and Well Written Essays - 750 words

HS630 week 9 conference - Essay Example In this regard, at the onset, risk was made apparently clear. Do people know what to do and when to do it? Through the eight stages, people are made aware on what to do and when to do it through information needs assessment, communication action assessment and communication action implementation stages (Lindell, Prater, & Perry, 2007, p. 83). For instance, in the stage involving information needs assessment, an identified need is confirmed. Through communication action assessment, people get to know what to do since â€Å"people often rely on the news media to confirm information they received about the hazard from other sources† (Lindell, Prater, & Perry, 2007, p. 84). And through communication action implementation stage, people have confirmed the threat or risk and take the needed protective action, as advised. Do people know and how to get more information? Yes, people get to know the manner of getting more information through â€Å"contacting many people many people over a short period of time (Drabek and Stephenson, 1971; cited in Lindell, Prater, & Perry, 2007, p. 85). Through the eight stages of warning and action, information is gathered and communicated effectively to enable them to gather as much information as reliably possible and to take appropriate action, as relayed. Essay Question 2: For a business or a local jurisdiction, outline an outreach communications plan for a crisis. Identify the type of crisis first, and 5 different audiences you need to communicate with. For each audience segment, summarize the key messages you need to convey, what media or method you would use to disseminate those messages, the timing (before a crisis, immediately after, during response, during recovery), and who might be the spokesperson (e.g., e-mail or tweet from a CEO; briefing by an expert). The spokesperson is optional. Follow the template below. potential flash floods as information was received from news media and local government agencies; include

Debate on the causes of global warming Essay Example | Topics and Well Written Essays - 1500 words

Debate on the causes of global warming - Essay Example While a dialectic method is used, it is used poorly, and there are almost no attempts at synthesis. The main topoi used by all sides are scientific data, but they are used poorly. There are three separate arguments made in the debate. One group of scientists claims that global warming is not occurring, another group claims that global warming is occurring because of natural changes in the earth's climate such as an increase in the level of solar radiation reaching the earth or changes in the patterns of winds, ocean currents, or volcanic activity, and another group claims that global warming is occurring because of an increase in carbon dioxide in the atmosphere due to the large scale combustion of fossil fuels by humans that started during the time of the first industrial revolution and continues up to the present day. There are several different types of arguments used by scientists that deny the existence of global warming. The three main scientific arguments used by that side of the debate are claims that temperatures in the upper atmosphere have fallen in the last few decades, an argument that meteorological data from the last century is inaccurate because of the heat island effect, and a claim that differences in the way that average temperature is measured today cause average temperatures today to appear higher than they were in earlier decades. The claim that the temperatures in the upper atmosphere have fallen in the last few decades is the weakest of the three because there is no scientific proof that temperatures in the upper atmosphere have any correlation with ground temperatures. The temperature data was also slightly modified for scientific reasons in the survey, and scientists who claim that global warming is happening say that it was modified incorrectly. The argument that the heat island effect; or the effect of thermometers in weather stations being in highly developed areas where there are many heat-retaining ground coverings, such as buildings, concrete, and asphalt; is the cause of the observed rise in temperatures is a better argument, but there have been no attempts to analyze the effects of increasing urbanization quantitatively or show the exact levels of new development around each weather station. The claim that average temperatures appear higher because temperatures are now taken four times each day instead of twice is an even better argument, because the temperatures taken at the two other times are usually closer to the daily high than the daily low, and that causes the average daily temperature for each day to appear higher. However, it has been claimed that average highs and average lows have both risen in the past few decades, making this argument seem less convincing. Nonscientific arguments made by scientists and others that claim that glob al warming is not occurring include an argument that there is a global conspiracy against capitalism or the United States by socialists or internationalists using environmental junk science and the argument that most environmentalist scientists thought that there was a pattern of global cooling and the risk of a new ice age in the 1970s. Both arguments are ad hominem attacks. While many of the scientists that support the theory of human-caused Global Warming are extreme environmentalists, there is

Romantic Relationship Case Study Example | Topics and Well Written Essays - 750 words

Romantic Relationship - Case Study Example After some distance, the train reached as certain destination along the way and some passengers were alighting including an old man who sat beside Pamela. Jerry knew that it was best for him to use the opportunity to move and occupy the space beside Pamela because he also felt attraction. As he headed to the seat, Pamela felt unease and turned her face way from Jerry. She knew that Jerry received her signals and was reacting. On occupying the space, Jerry greeted Pamela who responded positively. With slight smile, Jerry asked Pamela about her destination and both realized to be heading to the same destination. It is there that Jerry initiated talks that later developed until they exchanged contacts and would later meet to advance their intentions. Jerry and Pamela developed great passion and intimacy for one another, but were still living apart. Pamela could develop cold feelings and mood when it took long before meeting Jerry and vice versa. Both could express feelings of â€Å"missing one another† when a week lapsed without meeting and engaging in sexual intercourse. In fact, Pamela seemed so inclined into the relationship and cliqued to Jerry that they should begin living together. Both were students of different schools who rented apartments. Due to lack of commitment, Jerry refused the idea to live together for he knew that such relationship would demand a lot than he could offer. He suggested that they continue with their love as they took time to know one another deeply. By the end of four months, Pamela’s intimate feelings overwhelmed her and prompted Jerry about living together for she missed a lot about Jerry when they lived apart. Pamela expressed concern that she would quit the relationship should Jerry ignore her request because she was suffering. Due to immeasurable passion towards Pamela, Jerry feared that he would lose the former. The fear prompted him to accept Pamela’s desire and

The high speed 2 rail link from london to the north of England Essay

The high speed 2 rail link from london to the north of England. Critically evaluate by researching the arguments for and against high speed 2, ensuring you include up to five(5) for and five(5) against - Essay Example The second phase will comprise of stations at Manchester, Nottingham, Sheffield and Leads. It is expected to be complete by 2033 (Inderwildi and King 2012). According to research, the HS2 has received both approval and criticism by the public in equal measure. There are several reasons presented by either side, with environmental concerns and fiscal viability of the project raising the most debates. Having weighed the both sides of the arguments, I wish to present some of the major opinions for and against the HS2 project. HS2 is expected to create about 100,000 jobs opportunities in the construction industry once the entire line is running (High Speed Two (HS2) 2014). The line is expected to open up more transport connections which will minimize production and transport costs. This will stimulate higher productivity and consequently greater competition between various regions in UK. According to KPMG report, the UK productivity will rise by  £15 billion a year, which translates to 0.8 percent growth in the country’s GDP (KPMG 2013). The report also outlines that the project is more likely to benefit the Midlands and the North more as compared to London. The report suggests that more than 70 percent of the jobs opportunities will be created outside of London. The line has been described as one that bridges the north-south divide (Great Britain 2013). UK has had a raging debate for a long time regarding the future of the country’s airports. The major concern is their ability to provide sustained quality services even as the number of passengers continues to rise. The introduction of HS2 will certainly relieve some pressure from airports in the north of UK such as Birmingham Airport, which presently serves about 27 million passengers annually. With the addition of the rail line and the airport’s expansion in place, this figure could rise to about 70 million passenger traffic per year. The same effect is expected

Like Water for Chocolate Essay Example | Topics and Well Written Essays - 1000 words

Like Water for Chocolate - Essay Example She chooses to block out the poor treatment and hide her feelings away, tucked in the corner of her mind. But when one particular visitor group graces her with his presence, she is surprised and decides not to judge the rest of them. "They left peacefully, just as they had come, and Mama Elena was quite disconcerted by the way they had treated her: it didn’t fit the picture of the heartless ruffians she’d been expecting. From that day on she would not express any opinion about the revolutionaries. What she never learned was that this captain was the same Juan Alejandrez had carried off her daughter Gertrudis some months before." Chapter twelve is a very unique chapter because it gives us a glimpse of the Mama Elena’s character as she seems to slightly change throughout the story. This chapter focuses on the month of December. It’s been almost a year since they had found Tita’s recipes and Mama Elena is still upset that her daughter Tita (who had die d) wants to marry Pedro and leave her all alone. Her tyrannical personality seems to keep people away but for some reason, Juan Alejandrez’s sincere concern for her three daughters softened her heart. No trespassing! The visit from the entire battalion was more of a surprise as Mama Elena began to defend her turf. She raised her gun high and pointed it to the troops. Due to her maternal authority, even grown men were afraid of her. Though they had a perfect shot, they could not seem to do away with her because of her daunting personality. But as the captain chose not to shoot her, she realized that her assumptions of these people were incorrect. Though they came to take, they had such great respect for Mama Elena and her people. This confused her, making her rethink the definition of â€Å"heartless ruffians.† She feared them taking what was precious to her. She feared being left alone. According to tradition, who would care for her after all were gone? The chapterâ₠¬â„¢s theme is quite simple. The title of the chapter is â€Å"Chiles in Walnut Sauce.† This refers to hot personalities in a calming setting. The quote resembles this title and theme only because you have the so called â€Å"thieves† with a good nature. It appears that the title itself is ironic because no one expects to be confronted by polite thieves. It just does not fit the definition. This dish was being made for the wedding, so the shelling of the nuts had to be done quickly and correctly. As the chapter continues, and the ranch is burned down, the celebration of the weddings is ironically placed. Fireworks are not the causes of the fire but instead, candles†¦.to think the fire is fireworks celebrating a union creates a symbol of the last straw and is a sign the oppression being stopped. Once the ranch burnt to the ground, no longer were the Gaza sisters under Mama Elena’s tyrannical rule. Chili in a Walnut sauce is like a deaf person enjoying music. You must do what is expected of you! Duty, tradition and responsibility are the overriding themes in the entire book â€Å"Like Water for Chocolate.† Each are very important as the book moves from what one feels they must do to what one has to do for themselves. As tradition lies at the center of the story, it is important to note that throughout generations, tradition does not change, instead, people do. As

Strategic management practise Assignment Example | Topics and Well Written Essays - 5000 words

Strategic management practise - Assignment Example Examination of data and appropriate literature has uncovered that Sony maintains the most significant strategic issues associated with ineffective marketing strategies, a culture of power distance that forbids teamwork and collaboration, and poor positioning in its markets among competition. It is recommended that Sony work toward making a more decentralised and collaborative organisational culture, cease its process of quality and innovation positioning as part of brand management and marketing, and enact a performance management ideology that includes the 360 degree feedback mechanism as well as strategic and tactical dashboard to improve control and metrics production to guarantee more return on investment for the recommended changes. This should position Sony more competently among very diverse competitors worldwide. Strategy is the process of determining the long-run aspirations and goals of a business and deciding on the specific action plans and resource allocations required to achieve determined objectives (Nag, Hambrick and Chen 2007). Strategy is inclusive of management activities whereby direction for the firm is established, guidance provided to subordinate support staff members, and where the structure of the organisation is established. Strategic management is the development and implementation of objectives issued by a firm’s management team in order to position a business in a desirable future state. Businesses consist of many inter-dependent divisions that assist a firm in achieving its strategic goals, the firm’s value chain, which consist of marketing, production, human resources, customer service systems, technologies and other operational business components (Maritz and Salaran 2010). Strategic management is the process of aligning these divisions in the most effective and productive methodology so that the business can achieve its mission and guide the organisation toward its long-term goals. Through the proper

The high speed 2 rail link from london to the north of England Essay

The high speed 2 rail link from london to the north of England. Critically evaluate by researching the arguments for and against high speed 2, ensuring you include up to five(5) for and five(5) against - Essay Example The second phase will comprise of stations at Manchester, Nottingham, Sheffield and Leads. It is expected to be complete by 2033 (Inderwildi and King 2012). According to research, the HS2 has received both approval and criticism by the public in equal measure. There are several reasons presented by either side, with environmental concerns and fiscal viability of the project raising the most debates. Having weighed the both sides of the arguments, I wish to present some of the major opinions for and against the HS2 project. HS2 is expected to create about 100,000 jobs opportunities in the construction industry once the entire line is running (High Speed Two (HS2) 2014). The line is expected to open up more transport connections which will minimize production and transport costs. This will stimulate higher productivity and consequently greater competition between various regions in UK. According to KPMG report, the UK productivity will rise by  £15 billion a year, which translates to 0.8 percent growth in the country’s GDP (KPMG 2013). The report also outlines that the project is more likely to benefit the Midlands and the North more as compared to London. The report suggests that more than 70 percent of the jobs opportunities will be created outside of London. The line has been described as one that bridges the north-south divide (Great Britain 2013). UK has had a raging debate for a long time regarding the future of the country’s airports. The major concern is their ability to provide sustained quality services even as the number of passengers continues to rise. The introduction of HS2 will certainly relieve some pressure from airports in the north of UK such as Birmingham Airport, which presently serves about 27 million passengers annually. With the addition of the rail line and the airport’s expansion in place, this figure could rise to about 70 million passenger traffic per year. The same effect is expected