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Advantages And Disadvantages Of Series Vc

Christy Davis
Christy Davis
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Advantages And Disadvantages Of Series Vc
3.3.2 Series–VSC Advantages of series VSC:– 1) To mitigate voltage sag and swell. 2) To
compensate for voltage distortions, such as harmonics. 3) To compensate for interruptions. Figure
3.5: Control block diagram of series VSC The control block diagram of each series VSC is shown in
Fig.3.5 The bus voltage ( ) is detected and then transformed into the synchronous dq0 reference
frame using (11) Where, (12) And are fundamental frequency positive–, negative–, and zero–
sequence components, respectively, and is the harmonic component of the bus voltage. According to
control objectives of the MC–UPQC, the load voltage ... Show more content on Helpwriting.net ...
The parameters in Figure are corrected by adding suffix "1," indicating Feeder1, and the parameters
in Fig.3.7 are corrected by adding suffix "2," indicating Feeder2. As shown in Figs.3.6 and 3.7, load
voltages in both feeders are kept constant at Uo regardless of bus voltages variation, and the load
currents in both feeders are assumed to be constant at their rated values (i.e., Io1 and Io2,
respectively). Ul1 = Ul2 = Uo (16) (17) The load power factors in Feeder1 and Feeder2 are assumed
to be cosΨ1 and cosΨ2 and the per–unit sags, which must be compensated in Feeder1 and Feeder2,
are supposed to be x1 and x2 respectively. If the MC–UPQC is lossless, the active power demand
supplied by Feeder1 consists of two parts: 1) The active power demand of load in
... Get more on HelpWriting.net ...
Advantages And Disadvantages Of Series Vc
Iron carbon phase diagrams Essay
The Iron–Iron Carbide (Fe–Fe3C) Phase Diagram
In their simplest form, steels are alloys of Iron (Fe) and Carbon (C).
The Fe–C phase diagram is a fairly complex one, but we will only consider the steel part of the
diagram, up to around 7% C b d Carbon.
Phases present α–ferrite, γ–ferrite, δ–ferrite, Fe3C (iron carbide or cementite)
Fe–C liquid solution
School of Mechanical and Building Sciences, VIT University, Vellore
1
Phases in Fe–Fe3C Phase Diagram α–ferrite – solid solution of C in BCC Fe
Stable form of iron at room temperature.
The maximum solubility of C is 0.022 wt%
T
Transforms t FCC γ–austenite at 912 °C f to t it t γ–austenite – solid solution of C in FCC Fe
Fe3C (iron ... Show more content on Helpwriting.net ...
PM
L(0.53% C) + δ (
(
)
(BCC Ferrite of 0.1% C)
)
B
→ γ (FCC Austenite of 0.18% C)
(
)
N
The maximum solubility of carbon in BCC δ–iron is 0.1% (point M) whereas in FCC γ–iron, it is
greater. The presence of carbon influences the allotropic changes. As carbon is increased or added to
the iron, the temperature increases from 1400ºC to 1493ºC at
0.1%
0 1% carbon. b School of Mechanical and Building Sciences, VIT University, Vellore
7
Peritectic reaction – Fe–Fe3C System
Consider the portion NMPB in Peritectic Reaction
On cooling, the portion NM represents the beginning of the crystal structure change from BCC δ
iron to FCC γ iron for alloys
PM
B
containing less than 0 1% carbon
0.1% carbon.
Line MP represents the beginning of crystal structure change by
N
means of peritectic reaction for the alloys between 0.1 & 0.18%
Carbon.
Line NP represents the end of crystal structure change for alloys containing less than 0.18% C.
Portion PB represents the end of crystal structure by means of peritectic reaction for the alloys
between 0.18– 0.5% carbon. Here the reaction takes place isothermally (i.e.) at constant
temperature.
At the peritectic reaction point, liquid of 0.53% C combines with δ ferrite of 0.1% C to form FCC γ
austenite of 0.18% C
School of Mechanical and Building Sciences, VIT University, Vellore
8
4
Eutectic reaction –
... Get more on HelpWriting.net ...
Advantages And Disadvantages Of Series Vc
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Advantages And Disadvantages Of Series Vc

  • 1. Advantages And Disadvantages Of Series Vc 3.3.2 Series–VSC Advantages of series VSC:– 1) To mitigate voltage sag and swell. 2) To compensate for voltage distortions, such as harmonics. 3) To compensate for interruptions. Figure 3.5: Control block diagram of series VSC The control block diagram of each series VSC is shown in Fig.3.5 The bus voltage ( ) is detected and then transformed into the synchronous dq0 reference frame using (11) Where, (12) And are fundamental frequency positive–, negative–, and zero– sequence components, respectively, and is the harmonic component of the bus voltage. According to control objectives of the MC–UPQC, the load voltage ... Show more content on Helpwriting.net ... The parameters in Figure are corrected by adding suffix "1," indicating Feeder1, and the parameters in Fig.3.7 are corrected by adding suffix "2," indicating Feeder2. As shown in Figs.3.6 and 3.7, load voltages in both feeders are kept constant at Uo regardless of bus voltages variation, and the load currents in both feeders are assumed to be constant at their rated values (i.e., Io1 and Io2, respectively). Ul1 = Ul2 = Uo (16) (17) The load power factors in Feeder1 and Feeder2 are assumed to be cosΨ1 and cosΨ2 and the per–unit sags, which must be compensated in Feeder1 and Feeder2, are supposed to be x1 and x2 respectively. If the MC–UPQC is lossless, the active power demand supplied by Feeder1 consists of two parts: 1) The active power demand of load in ... Get more on HelpWriting.net ...
  • 3. Iron carbon phase diagrams Essay The Iron–Iron Carbide (Fe–Fe3C) Phase Diagram In their simplest form, steels are alloys of Iron (Fe) and Carbon (C). The Fe–C phase diagram is a fairly complex one, but we will only consider the steel part of the diagram, up to around 7% C b d Carbon. Phases present α–ferrite, γ–ferrite, δ–ferrite, Fe3C (iron carbide or cementite) Fe–C liquid solution School of Mechanical and Building Sciences, VIT University, Vellore 1 Phases in Fe–Fe3C Phase Diagram α–ferrite – solid solution of C in BCC Fe Stable form of iron at room temperature. The maximum solubility of C is 0.022 wt% T Transforms t FCC γ–austenite at 912 °C f to t it t γ–austenite – solid solution of C in FCC Fe Fe3C (iron ... Show more content on Helpwriting.net ... PM L(0.53% C) + δ ( ( ) (BCC Ferrite of 0.1% C) ) B
  • 4. → γ (FCC Austenite of 0.18% C) ( ) N The maximum solubility of carbon in BCC δ–iron is 0.1% (point M) whereas in FCC γ–iron, it is greater. The presence of carbon influences the allotropic changes. As carbon is increased or added to the iron, the temperature increases from 1400ºC to 1493ºC at 0.1% 0 1% carbon. b School of Mechanical and Building Sciences, VIT University, Vellore 7 Peritectic reaction – Fe–Fe3C System Consider the portion NMPB in Peritectic Reaction On cooling, the portion NM represents the beginning of the crystal structure change from BCC δ iron to FCC γ iron for alloys PM B containing less than 0 1% carbon 0.1% carbon. Line MP represents the beginning of crystal structure change by N means of peritectic reaction for the alloys between 0.1 & 0.18% Carbon. Line NP represents the end of crystal structure change for alloys containing less than 0.18% C. Portion PB represents the end of crystal structure by means of peritectic reaction for the alloys between 0.18– 0.5% carbon. Here the reaction takes place isothermally (i.e.) at constant temperature.
  • 5. At the peritectic reaction point, liquid of 0.53% C combines with δ ferrite of 0.1% C to form FCC γ austenite of 0.18% C School of Mechanical and Building Sciences, VIT University, Vellore 8 4 Eutectic reaction – ... Get more on HelpWriting.net ...
  • 7. Lunar Phase Simulator – Student Guide Name: Lunar Phase Simulator – Student Guide Part I: Background Material Answer the following questions after reviewing the background pages for the simulator. Page 1 – Introduction to Moon Phases Is there a dark side of the moon? (Note: this question can be effectively answered either yes or no, so it is important to explain your reasoning.) ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ How long does it take the moon to ... Show more content on Helpwriting.net ... In the figure below, bisect the moon twice. a) Draw a line (perpendicular to the direction of sunlight) that shows the half of the entire moon that is illuminated and shade the shadowed region. b) Draw a line (perpendicular to the Earth–moon line) that shows the half of the moon visible for an observer on earth. c) Mark the region that is both visible from earth and illuminated by the sun. That region will be the phase of the moon we on earth see. Moon sunlight We normally draw the phases of the moon with the terminator (the dividing line between light and shadow) from the north pole to the south pole of the moon. This is how the moon would be seen if it were on the observer's meridian. We can use the drawing above to determine the amount of illumination and whether it is on the left or right hand side of the moon. Use the drawing above to draw the appearance of the moon in the box below. Open the Moon Bisector Demo and use the simulator to check your answer to the above problem. Earth NAAP – Lunar Phase Simulator 4/11 Part III: Working with the Lunar Phase Simulator The items below will help familiarize yourself with the controls and usability features of the simulator. If you have not already done so, launch the NAAP Lunar Phase Simulator The main panel has sunlight, the earth, and moon. The
  • 8. ... Get more on HelpWriting.net ...
  • 10. Lunar Phase Simulator – Student Guide Name: Lunar Phase Simulator – Student Guide Part I: Background Material Answer the following questions after reviewing the background pages for the simulator. Page 1 – Introduction to Moon Phases Is there a dark side of the moon? (Note: this question can be effectively answered either yes or no, so it is important to explain your reasoning.) Some people refer to the side of the moon that we never see from Earth as the dark side. However, this is inaccurate since the far side is not always dark. For example, during the new moon, when the side facing Earth is completely dark, the other side of the moon is facing the sun, so it is in full sunlight. Since the Moon rotates at the same time it takes to orbit Earth, both sides of the ... Show more content on Helpwriting.net ... In the diagram below the sun's light is coming in from the right. The moon's location is marked at several points on its orbit. These are the points the moon was at when the sketches above were drawn. Identify each position with the letter of the corresponding sketch. NAAP – Lunar Phase Simulator 2/11 Page 3 – The Time of Day Use the interactive diagram at the bottom of the page to determine the direction of the earth's rotation when viewed from above the North Pole. (Hint: rotate the observer – the stickfigure – to the noontime position, then sunset position, then midnight position, and finally back to sunrise position. The earth has made one complete rotation and the observer has experience one daily (diurnal) cycle of day and night.) When viewed from above the North Pole, does the earth rotate clockwise or counter–clockwise? _counter–clockwise Page 4 – Rising and Setting Page 5 – The Horizon Diagram Describe the location of the moon in the sky of the horizon diagram at bottom. Use direction words (like north, west, etc.) and estimate its altitude in degrees. Location of the moon – east. Altitude = 00 Page 6 – The Witness and the Detective
  • 11. If we know the moon's position in the sky and its phase, we can estimate the time. In general, knowing any two of the ... Get more on HelpWriting.net ...
  • 13. Design And Fpga Implementation Of Ofdm Synchronization Chapter 5 Design and FPGA Implementation of OFDM Synchronization The channel estimation technique proposed in Chapter 4 is based on the assumption that the coherent reception is perfect. That is, the system synchronization is perfectly implemented. Synchronization is one of the most challenging and important tasks to any receiver using coherent modulation, especially for OFDM systems which are highly sensitive to synchronization errors. This chapter proposes a synchronizer based upon the delay and correlation algorithm and the synchronization system is modeled within XSG. Simulation results have been provided for presenting the system synchronization performance clearly. The implementation results on FPGA are given at the end. 5.1 Synchronization for OFDM 5.1.1 Introduction to OFDM Synchronization Generally speaking, synchronization is divided into timing and frequency synchronization. In practice, the oscillator does not produce a carrier at exactly one frequency, and the carrier frequency is modulated by random phase jitter [2]. The phase noise introduced results in a mismatch of frequencies between the local oscillators at the transmitter and the receiver. In addition, Doppler effects in fading channel also causes frequency offsets at the receiving carrier. As a result, the numbers of subcarriers cycles within the FFT period are not integers anymore, and the orthogonality property between subcarriers is not kept, causing ICI for an OFDM system. In contrast, in a ... Get more on HelpWriting.net ...
  • 15. Caffeine And Tannic Acid From Tea Lab Report Objectives: The objective of this experiment is to extract caffeine and tannic acid from tea leaves. From there, the caffeine will be purified through the process of sublimation. Techniques and Reactions: Sublimation: When a substance transitions from the solid phase to a gas phase without going through an intermediate liquid phase. Physical Data Table: Compound/ Formula Physical Property Molecular Weight Density Amount 2 Tea Bags 4.5 g Sodium Carbonate Na2CO3 White solid mp 854 C 105.99 g/mol 1.1 g Caffeine C8H10N4O2 White solid mp 238 C 194.20 g/mol (product) Procedure: Caffeine Extraction: 1. Add two tea bags, 1.1 g sodium carbonate, and 40 mL water to a 250 mL beaker. Dissolve the sodium carbonate. 2. Cover beaker with watch glass, and heat solution in beaker directly on hot plate. Maintain gently boil for 30 minutes. 3. Transfer solution to 15 mL centrifuge tube. Use spatula to squeeze additional liquid out of the tea bag. 40 mL of solution should be extracted in fractions. 4. Cool solution in the ice bath before adding 2 mL of methylene chloride. Mix the two phases by drawing and squirting methylene chloride into aqueous layer. 5. Centrifuge the two–phase solution to separate emulsions. 6. Prepare a drying filter using filter flask, Hirsch funnel with filter paper, and 2 g anhydrous sodium sulfate. 7. Pipette out lower organic layer and pass the solution through the sodium sulfate while applying a vacuum. Wash Na2SO4 pad with 1–2 mL CH2Cl¬2. Evaporate ... Get more on HelpWriting.net ...
  • 17. Variable Speed Control Techniques For Single Phase Ac... ABSTRACT This work presents a variable speed control techniques for single phase ac motor. A pulse–width– modulation (PWM) AC chopper changes the value of the supply voltage applied to a single–phase motor. The variable supply voltage gives better speed control of motor. Harmonics generated by unit of speed control are filtered by an input filter circuit. Experimental results would be in 230V and speed control of single–phase motor shows that PWM AC Chopper is simple and cost effective control method compared to better control method to other methods in terms of simplicity and input harmonic content. In this harmonics reduction techniques for designing a Pulse Width Modulation (PWM) AC voltage controller is required. So that Total current Harmonics Distortion (THDi), obtained for to be minimized. In the Main Circuit we have used Insulated Gate Bipolar Transistor (IGBTs) or MOSFET to obtain output waveform as we shown theory of AC voltage controller with PWM techniques. We will be used at the end of project with Microcontroller are presented. We obtained results by the analysis of the AC single phase motor and PWM AC chopper is derived and its behavior of the system is studied by simulation using MATLAB and PROTEUS. The Mains power factor, motor speed, and current are analyzed for different conditions as using many circuits via op–amp, IC 555, optocoupler and ARDUINO. Harmonics analysis of the motor voltage and current are given and compared with phase control techniques. ... Get more on HelpWriting.net ...
  • 19. Technology Capability Development : Chen Hongsheng, A... Chen HONGSHENG, a military scientist who is leading stealth technology capability development for the J20 made an initial unsolicited approach towards our organization fourteen months ago. Since then HONGSHENG has made six other attempts to make contact for a total of seven approaches. During those approaches he provided information of intelligence value to two occasions. On the second occasion he provided personal information which will be used to support background checks. Given the current political and security climate this operation will be highly sensitive and therefore the overall assessed risk of the operation is high. Additional precautions will be taken to ensure the security of the overall operation. Until additional information on HONGSHENG is available this operation will be treated as if HONGSHENG has already been compromised. The compromise, given his desperation could mean that he is providing information to other intelligence organizations, we will not assue that we are the only organization that he has approached. Even if HONGSHENG's intent is legitimate, given that he has made seven know approaches, there is a high probability that he is under suspicion. Therefore, we will not use of existing facilities and the normal support apparatus. There will be minimal expose of our procedures and contact with our personnel will be limited. A clear understanding of HONGSHENG's value as an asset must be evaluated prior to a full investment. While HONGSHENG ... Get more on HelpWriting.net ...
  • 21. The Applications of Typical as-plasma-sprayed... Typical as–plasma–sprayed hydroxyapatite (HA) coatings along the thickness have an internal gradient structure and chemistry [Rs]. The thickness gradient structure extends from amorphous base to crystalline surface. During plasma spraying, the amorphous calcium phosphate (ACP) base is formed by rapid cooling of external molten part of flying HA spray–powder particles upon impact on cold substrate. If the flying HA spray–powder particles are heated in plasma jet above 1843 K, but below 1973 K, the ACP, tricalcium phosphate (TCP) and tetracalcium phosphate (TTCP) will co–exist in close proximity within rapidly quenched structure [Rs]. If overheating temperatures are higher than 1973 K, the CaO will be additionally present. The CaO–containing ACP phase can be considered as hydroxyl–deficient phase because it is formed from a melt which has experienced the highest temperatures in plasma jet (>1973 K) [Rs]. The ACP, TTCP and CaO produce an increase of the Ca/P molar ratio in the near–interface region of the as–plasma–sprayed HA coatings, which is known as the Ca/P ratio gradient [Rs]. Considering the applications of HA coatings as medical implants, the thickness gradient structure is unfavorable. The crystalline surface promotes poor initial bone fixation and the ACP base imparts low structural integrity of the HA coatings [Rs]. The last is of particular importance because a brittle nature of the ACP phase has been frequently held responsible for deterioration of the HA coating's ... Get more on HelpWriting.net ...
  • 23. IVoltage source inverters (VSI’s) are widely used in... IVoltage source inverters (VSI's) are widely used in electric drive applications. Generally inverters contain certain amount of harmonics in the output. Inverters quality is expressed with the help of parameters of performance. Parameters like lower order harmonics (LOH), total harmonic distortion (THD) Distortion Factor basically plays a vital role on the performance of an inverter. Harmonics give undesirable effects the following undesirable effects [1]–[2. Ill effects of harmonics are A. Poor Quality Supply As all power electronic converters generate harmonic currents, which will be injected into the utility, causing distortion of the supply waveform. B. Malfunctioning of Relays Due to the ... Show more content on Helpwriting.net ... So harmonics directly effect the system performance. For performance improvement of an inverter it is desirable to eliminate harmonics. IEEE 519 Standard gives maximum allowable limits for voltage and current distortions [3]. VSI gives less qualitative outputs with conventional voltage control techniques Output voltage of an inverter can also be varied by controlling on–off periods of its switches. This is the most popular and efficient method for controlling inverter output voltage. 2.4 Pulse Width Modulation in VSI's Output Voltage of the Inverter can be modified or controlled by controlling or modifying switching current, or in case of Power Switches, by controlling or modifying Gate current. This control is achieved by PWM control. In one of the methods of controlling inverter output voltage, a fixed DC voltage is given to the inverter and by varying the ON and OFF time of power switches we get a controlled or modified AC output voltage. This method is popularly called as Pulse Width Modulation (PWM) method. The features of PWM inverter can be summarized as follows Filter size can be smaller compared to the filter used with square wave inverter The inverter has constant dc link voltage and it uses PWM principles for voltage control. The output voltage waveform improves with respect to harmonic content Frequency limit is 150 Hz using thyristorised ... Get more on HelpWriting.net ...
  • 25. Advantages And Disadvantages Of Arrays What is meant by array? An antenna is a system of similar antennas oriented similarly to get greater directivity in a desired direction. 2. What is meant by uniform linear array.? An array is linear when the elements of the array arespaced equally along the straight line. If the elements arefed with currents of equal magnitude and having a uniform Progressive phase shift along the line, then it is calleduniform linear array . 3. What are the types of array? a. Broad side array. b. End fire array c. Collinear array. d. Parasitic array. 4. What is Broad side array? Broad side array is defined as an arrangement inwhich the principal direction of radiation is perpendicularto the array axis and also the plane containing ... Show more content on Helpwriting.net ... Tapering is done fromcenter to end. 19.What is a binomial array? It is an array in which the amplitudes of theantenna elements in the array are arranged according to thecoefficients of the binomial series. 20.What are the advantages of binomial array? Advantage: No minor lobes Disadvantages: Increased beam width Maintaining the large ratio of current amplitude in large arrays is difficult 21. What is the difference between isotropic and nonisotropicsource Isotropic source radiates energy in alldirections but non–isotropic source radiates energy only in some desired direction. Isotropic source is not physically realizablebut non–isotropic source is physically realizable. 22.Define Side Lobe Ratio Side Lobe Ratio is defined as the ratio ofpower density in the principal
  • 26. or main lobe to the powerdensity of the longest minor lobe. 23. List the arrays used for array tapering Binomial Array:Tapering follows thecoefficient of binomial ... Get more on HelpWriting.net ...
  • 28. Sdlc : System Development Life Cycle SDLC: System Development Life Cycle Definition: The System Development Life Cycle describes functions and activities that system developers perform typically, without considering how those functions and activities actually used in that particular methodology. SDLC denotes a set of general categories that show the major steps, of system development project. These are different phases in SDLC which each of them can be used to denote a step of the process that is followed in the development of certain system. These phases remain same at all the time for different systems as they are the basic steps. Phases of SDLC: There are five different phases. They are 1. System Planning 2. System Analysis 3. System Design 4. System Implementation 5. System Operation and Support Each of these phases are explained below. Example: Creation of a Robot. 1. System Planning: The goal of stage 1 is to direct a preparatory analysis, propose elective solutions, portray costs and advantages and present a preparatory arrangement with proposals. Conduct the preparatory analysis: in this stride, you have to discover the organization 's destinations and the nature and extent of the issue under study. Regardless of the fact that an issue alludes just to a little fragment of the organization itself then you have to discover what the goals of the organization itself are. At that point you have to perceive how the issue being concentrated on fits in with them. Propose elective solutions: In diving into ... Get more on HelpWriting.net ...
  • 30. Advantages And Disadvantages Of Digital Investigation Models I. COMPARATIVE STUDY OF DIGITAL INVESTIGATION EXISTANT MODELS In this section we study and analyze some related work of digital investigation models. Advantages and disadvantages of each methodology will be extracted. Our aims is not selecting the best model but to build a new investigation methodology based on aggregation of different models steps [2], [3], [4], [5], [6], [7], [8], [9] which can meet evidence criteria. A. COMPUTER FORENSIC INVESTIGATIVE PROCESS The first investigation model was appeared in 1984 [2], composed of 4 main phases, which are acquisition, identification, evaluation and admission. Acquisition phase gives the importance of authenticity for investigation process as it will be indicated. Relevant data collection is modeled with identification phase. From all collected data, estimation and hypothesis are examined in evaluation phase. The last phase is admission which involves the presentation of founded results and concluding evidence with understandable form before inspection by the court. However, compared with next adopted investigation framework, this methodology was not focused on securing and preserving data from intrusion during the ... Show more content on Helpwriting.net ... Six primary phases have been introduced in this model. Internet phase helps investigator to examine the internet artifact to return more relevant data. User profile phase is added to this model in order to analyze user features, his relations, his applications and his preferences. This task helps investigator to understand the incident case. Case specific phase aims to classify the incident case for becoming better clearer. For example, electronic attack incident is different from the one focused on child pornography crime. Confidentiality and integrity of collected information are not respected. Owner property is not done and investigation event is not ... Get more on HelpWriting.net ...
  • 32. SDLC Great ideas turn into action by first creating a plan of action. There are many decision–making methods than can be used. The SDLC is an excellent way to implement a plan and help make decisions. Brainstorming and using other decision–making tools can also help an idea to grow into action. There are a lot of ways to end an excellent plan. Poor decision making skills and mismanagement can destroy any hopes of a plan reaching its goal. This was true in our scenario. The problem with the employees being in the wrong training class is a good example of a great idea being halted. The remarkable idea to have the business officers decide which classes their employees needed did not work because they were not aware of what the classes offered. Nor ... Show more content on Helpwriting.net ... 2)We should also find out who needs what without the assumption of what you think they need. 3)Also needed is relevant data gathering specific to the questions and project needs. 4)Making sure the training courses contain information that is relevant to workers needs. 5)Revising evaluation questions and plans as project conditions change. As time goes on, make sure any important changes that arise are updated in the training materials. Knowing what resources are available/ needed for evaluation. Understanding the existing capacity of the implementation. Why is the new system being introduced and what can be done in the new system? Realizing the capabilities and limitations of existing technologies. Knowing that the software (SAP) is limited in what it will do based on user input. The process of undergoing an evaluation can, for example, build shared meaning and understanding, support and enhance the program (by building evaluation–based data collection and analysis into the program design); and/or support human and organizational development by training staff in new skills. A well thought–out evaluation will provide benefits no matter what the results are. By the simple virtue of being well thought– out, the evaluation will provide program staff an opportunity to learn, and to teach. Through the implementation of the SAP, it is assumed that overall productivity will increase. Adequate job training has become essential for production. With ever changing ... Get more on HelpWriting.net ...
  • 34. Phases of the Moon Sunlight is shown coming in from the right. The earth, of course, is at the center of the diagram. The moon is shown at 8 key stages during its revolution around the earth. The moon phase name is shown alongside the image. The dotted line from the earth to the moon represents your line of sight when looking at the moon. The large moon image shows what you would see at that point in the cycle. For the waning gibbous, third quarter, and waning crescent phases you have to mentally turn yourself upside down when imagining the line of sight. When you do this, you 'll "see" that the illuminated portion is on your left, just as you see in the large image. One important thing to notice is that exactly one half of the moon is always illuminated ... Show more content on Helpwriting.net ... If you were to view the moon cycling the earth from outside our solar system (the viewpoint of the stars), the time required is 27.3217 days, roughly two days less. This figure is called the sidereal period or orbital period. Why is the synodic period different from the sidereal period? The short answer is because on earth, we are viewing the moon from a moving platform: during the moon cycle, the earth has moved approximately one month along its year–long orbit around the sun, altering our angle of view with respect to the moon, and thus altering the phase. The earth 's orbital direction is such that it lengthens the period for earthbound observers. Although the synodic and sidereal periods are exact numbers, the moon phase can 't be precisely calculated by simple division of days because the moon 's motion (orbital speed and position) is affected and perturbed by various forces of different strengths. Hence, complex equations are used to determine the exact position and phase of the moon at any given point in time. Also, looking at the diagram (and imagining it to scale), you may have wondered why, at a new moon, the moon doesn 't block the sun, and at a full moon, why the earth doesn 't block sunlight from reaching the moon. The reason is because the moon 's orbit about the earth is about 5 degrees off from the earth–sun orbital plane. However, at special times during the year, the earth, moon, and sun do in fact "line ... Get more on HelpWriting.net ...
  • 36. The Designed User Workflow For The Application Figure 3: The designed user workflow for the application. When the signal is submitted by the user, AgileFD is run twice, once with just the most recently submitted signal(s) in order to determine what data points to constrain the submitted signal(s) to, and then a second time with all submitted signals and past constraints to show what areas are being reconstructed well/poorly (green/red). Note: Selected points are indicated by turning to black. Results and Discussion This application was tested on a singular system, of Tantalum, Rhodium and Palladium (Ta–Rh–Pd). The metrics that will be analyzed is how well the Phase Mapper Game's solution compared to AgileFD alone in terms of speed, satisfying constraints, and having a physically meaningful solution. It should be noted that the user for Phase Mapper Game has much experience working with the system so the time does not reflect what would be the average for a lay person. The system was not tested on a lay person however because it has not been developed far enough to be that accessible. For this test of the application the solutions were compared for when only three solution patterns were found. Time As seen in Figure 4, the solution patterns found for the Phase Mapper Game and AgileFD alone seem to be located in the same regions. With Phase 1 and 2 for both following the connectivity constraint, whereas Phase 3 seems to violate it, and more so in the Phase Mapper Gamer solution. It is expected that both solutions would ... Get more on HelpWriting.net ...
  • 38. Advantages And Disadvantages Of Phased Effort Distribution 3.2.1 Phased effort distribution Reasonable resources allocation to software phases is a vital factor for the success of software projects‎ [52].Effort distribution to phases is the key to a more efficient resource allocation. This approach is proposed to estimate the effort of migrated services. The effort is estimated for different project phases. The service's cost often varies depending on the migration strategy used; this is mainly because each migration strategy has its own cost factors. In this approach, the cost factors of SOA are extracted from previous literatures .These cost factors are distributed among SOA project phases. Each cost factor is given a weight for each migration strategy. These weights of different factors are grouped by project phase. All the weights of all factors are aggregated per migration strategy. The relative effort ratio for each phase is calculated by dividing the total weights of the phase factors to the total weight of the migration strategy The whole process is summarized in Figure 12. Figure 12: Block ... Show more content on Helpwriting.net ... These factors are as follow: Migration duration, level of tools support, performance post migration, integration costs which involve systems integration with business partners cost and difficult to integrate with new breed of technologies. Furthermore the factors: maintainability after migration, modifications require considerable testing effort, and experienced resources needed have been discussed in both ‎‎ [25]and‎ [31]. Another research ‎ [32] has evaluated migration strategies from technical value and both cost and business value. For the purpose of our research, only business value will be considered. As testing effort can't be ignores, testing factors have to be considered. They have been addressed in ‎ [54],which showed testing from two dimensions: testing level and testing ... Get more on HelpWriting.net ...
  • 40. Delayed Sleep Phase Disorder ( Dspd ) Lindley Hill Dr. Quiray BSC–1085C–003 24 September 2015 Circadian Rhythm Disorder Commonly known as Delayed Sleep Phase Disorder (DSPD) and other names, is a disorder in which the persons internal body clock is not in sync with the morning–rise evening–sleep pattern of the majority of people. Individuals with this disorder are not able to sleep and wake at the times that are regulated by normal work and school hours. They usually get enough sleep to keep them at a functional level through the day but not enough to be considered "well rested". Polysomnography and actigraphy are tests commonly ordered for some sleep disorders to determine the illness. The cause of Delayed Sleep Phase can include a variety of reasons; puberty being one of the main causes, but some people are born with the disorder. The short term and long term effects of this illness is unfortunate for a person's overall health. Overall cures to this disorder have not been found yet. Doctors have suggested sleeping pills to help or other alternatives. The disorder affects the timing of sleep, peak period of alertness, the core body temperature rhythm, hormonal and other daily cycles. There are different levels of this disorder to which a person can be affected. Mild: Two–hour delay associated with little or mild impairment of social or occupational functioning. Moderate: Three–hour delay associated with moderate impairment. Severe: Four–hour delay associated with severe impairment. ... Get more on HelpWriting.net ...
  • 42. A Study On Hybrid System CHAPTER 2 LITREATURE REVIEW 2. 1 Literature Overview The following literature survey for the current report consists of various papers on hybrid system published in the IEEE conferences and the journals. The conclusions and explanation is also described 2.2 Early Developments 2.2.1 Comparison of simulation results of three level & five level H–bridge multilevel inverter by mamta N. kokate The conventional two levels Inverter have many limitations for high voltage and high power application. Multilevel inverter becomes very popular for high voltage and high power application. The multilevel inverter is started with the three level converters. The elementary concept of a multilevel converter to achieve higher power to use a series of power semiconductor switches with several lower voltage dc source to perform the power conversion by synthesizing a staircase voltage waveform. However, the output voltage is smoother with a three level converter, in which the output voltage has three possible values. This results in smaller harmonics, but on the other hand it has more components and is more complex to control. In this paper, study of different three level inverter topologies and SPWM technique is explain and SPWM technique has been applied to formulate the switching pattern for three level and five level H–Bridge inverter that minimize the harmonic distortion at the inverter output. This paper deals with comparison of simulation results of three levels and five ... Get more on HelpWriting.net ...
  • 44. Effect of the Lunar Phase on Events of the Earth Title: Explore the effect of the lunar phase on events on Earth – temperature and birth rates. Subject: Astronomy Grade level: High school – grades 10–12 Project Type: Descriptive Cost: Low Awards: First place in the Leader Regional Science Fair 2003 Honorable Mention at the Canada Wide Science Fair 2003. Affiliation: Canada Wide Virtual Science Fair Link: http://www.virtualsciencefair.org/2003/sitte3b/public_html/ | Short Background | | Lunar phase (or Moon phase) refers to the appearance of the illuminated portion of the Moon as seen by an observer, usually on Earth. The lunar phases vary cyclically as the Moon orbits the Earth, according to the changing relative positions of the Earth, Moon, and Sun. One half of the lunar ... Show more content on Helpwriting.net ... Kelly, Rotton, and Culver report that Caton examined 45,000,000 births and found a weak peak around the third quarter phase of the Moon, while the full moon and new moon phases had an average or slightly below average birth rate.In 1959 Walter and Abraham Menaker reported that a study of over 510,000 births in New York City showed a 1 percent increase in births in the two weeks after full moon. In 1967 Walter Menaker studied another 500,000 births in New York City, and this time he found a 1 percent increase in births in the two–week period centered on the full moon. In 1973 M. Osley, D. Summerville, and L. B. Borst studied another 500,000 births in New York City, and they reported a 1 percent increase in births before the full moon. In 1957 Rippmann analyzed 9,551 births in Danville, PA and found no correlation between the birth rate and the phase of the moon.A fifteen month study in Jacksonville, Florida also revealed at least no lunar effect on crime and hospital room admittance. In particular:There was no increase in crime on full moons, according to a statistical analysis by the Jacksonville Police Department. Five of the fifteen full moons had a higher than average rate of crime while ten full moons had a lower than average rate. The ... Get more on HelpWriting.net ...
  • 46. The Rate a Drug is Released in the Body Rate of drug release at any given location within gastrointestinal tract depends on the mechanism by which the drug released from pellets and local environment within git. In order to predict in vivo behavior of dosage forms, knowledge of release mechanism and physiological conditions of git should be understood. Type of coating and method of applying coating will determine dominant mechanism of drug release from coated pellets. Release kinetic is predominantly determined by the behavior of coating material under physiological conditions of git. Multiparticulates coated for extended release purpose; release the drug by eighter diffusion or erosion or combination of these mechanisms. Pellets coated with polymer not soluble under gi conditions releases drug by 4 different mechanisms: 1. Solution/ diffusion through the continuous plasticized polymer phase This mechanism is based on assumption that the polymer forms a continuous phase in which the plasticizer & other additives are homogeneously dispersed. When polymer film is formed, it contains molecular sized openings between crosslinked chains of polymer. Plasticizer & other additives affects wetting of these openings as well as interchain dimensions by changing the crosslinking properties of polymer chains which are critical for diffusion of drug. Mostly, drug molecules diffuse through these openings in a process known as hindered molecular diffusion. It is an activated process wherein thermal fluctuations of chain segments ... Get more on HelpWriting.net ...
  • 48. Determination of the Solid-Liquid Phase Diagram for... Experiment #1: Determination of the Solid–Liquid Phase Diagram for Napthalene–Biphenyl Using Thermal Analysis Objective To apply thermal analysis to the two–component system, naphthalene–biphenyl at atmospheric temperature. The analysis will be represented by a solid–liquid phase diagram (freezing point diagram). Theoretical Principles Phase Equilibria and the Gibbs Phase Rule This experiment is conducted in order to study a condensed system (solid–liquid) at constant temperature (atmospheric temperature). It should be noted that the atmospheric pressure is unlikely to be the equilibrium pressure for the system. However, equilibria in condensed systems are not very sensitive to pressure. The freezing point is determined at ... Show more content on Helpwriting.net ... The temperature of the cooling bath must be adjust so that it is always about 3oC below the temperature of the contents. 4. Remelt the contents of the tube and add the counterpart component based on the given schedule. Ask the demonstrator to adjust the cooling water between mixtures. During the experiment, record and plot the data obtained for all mixtures listed. The experiments are stopped as follows: i. Mixtures 1, 5, 8 – when plateau is reached ii. All others – when the initial change in slope can clearly be identified 5. Draw the SL diagram for naphthalene–biphenyl with ToC as the y–axis, and wt % as the x– axis. Results and Discussion Results Mixture 1 Refer to Figure 1: Mixture 1 By observation, the freezing point is determined to be 80.5oC. In comparison to the pre–lab data,
  • 49. Mixture 3 Refer to Figure 2: Mixture 3 It is suspected that the freezing point is 64.1oC. Due to the short temperature plateau, It is difficult to determine if the freezing point occurs at during the interval (6:00–6:10). However, it appears to be have been the most reasonable determination for freezing point in comparison to the rest of the plot. In comparison to the pre–lab data, Mixture 4 Refer to Figure 3: Mixture 4 By observation, the freezing point of this mixture is 51.6oC. In comparison to the pre–lab data, Mixture 5 Refer to Figure 4: Mixture 5 Due to the lengthy plateau, the freezing point is determined to be 69.1 oC. ... Get more on HelpWriting.net ...
  • 51. William Bridges Transition Model Managing Transitions by William Bridges is a well–constructed text written on Change Management. Bridges begins by expressing the clear distinction between "change" and "transition", with emphasis that change and transition are not interchangeable terms, but completely separate processes. The concept, according to Bridges, is simple: Change is situational, it is eventful, visible and tangible. Change is the WHAT. Transition is psychological, a continuous process that happens over a span of time, it is internalized by people. Transition is the HOW. Transition is internal, it is what happens to the person mentally as they process the change. "Change is situational: the move to a new site, the retirement of a founder, the reorganization of the roles on the team, the revisions to the pension plan." "Transition is psychological: a three–phase process people go through as they internalize and come to terms with the details of the new situation that the change brings about." Bridges says that these phases have no sequential order of occurrence and the people will go through transition at their own pace. It is not uncommon for an organization to be in more than one phase in the transition process at a given time. This simply depends on how each team has handled the change, some people may have already started the Neutral Zone while others are still lagging behind in the Ending phase. Bridges' Transition Model is illustrated in figure 1.1. Figure 1.1 (photo credit: ... Get more on HelpWriting.net ...
  • 53. Organisational Change Chapter 2 Organisational Change Chapter 2 The Nature of Change 1 Introduction The chapter:  Discusses a number of frameworks for categorising change.  Explains why, in order to be effective, it is necessary to understand the differences between various types of change. 2 Objectives To:  Emphasise the complex nature of organisational change;  Describe and discuss the multi– dimensional nature of organisational change;  Analyse change situations in order to choose appropriate methods of managing and implementing change;  Recognise that there are limitations to the 'common–sense' approach to managing change that assumes that change can be planned as a logical. Step by step, sequence of activities.  This because of cultural, ... Show more content on Helpwriting.net ...  Downsizing, re–engineering.  4. Corporate Transformation (frame–breaking effecting the whole organisation).  As described earlier as discontinuous or frame–breaking change. A contemporary research study found that most organisations have been undergoing types 3 & 4 change. 13 Environmental conditions and types of change ENVIRONMENTAL FORCES FOR CHANGE Ansoff and McDonnell (1990) Predictable Forecastable by extrapolation Moderate Close to certainty Predictable threats and opportunities Partially predictable opportunities Modular transformation Corporate transformation Converging (incremental) Incremental adjustment Bumpy
  • 54. incremental Strong Far from certainty Unpredictable surprises Contained Strebel (1996) Weak Stacey (1996) Tushman et al. (1988) TYPES OF CHANGE Dunphy & Stace (1993) Grundy (1993) Stacey (1996) Close to certainty Converging (fine–tuning) Fine–tuning Smooth incremental Closed Discontinuous or framebreaking Discontinuous Open–ended 14   Phases of Emergent Versus Planned Change (1) Fine tuning and incremental change are usually also seen as emergent, 'unfolding as it happens'. The organisation, an open system, engages 'naturally' in emergent change as it tries to maintain equilibrium with its changing environment. 15  Phases of Emergent Versus Planned Change (2) However, organizations that rely only on making emergent change may ignore 'warning ... Get more on HelpWriting.net ...
  • 56. 1A. The Phases That Jeannine Skipped Are 1. The Systems 1a. The phases that Jeannine skipped are 1. The systems analysis and requirements phase 2. The systems design phase 3. The implementation phase and 4. Operations and Maintenance phase (Systems support and security). 1b. When Jeannine skipped the system analysis phase, she failed to analyze the needs of the end user and whether the system she came up with would meet her final requirements. Although Jeannine incorrectly believes she knows what is required she is unaware that the financial comptroller has been reevaluating the manner in which the company invests money. Skipping the systems analysis phase ensures Jeannine has no logical model of the system that she designs and disregards company policies and the change in progress. By ... Show more content on Helpwriting.net ... Had Jeannine followed the proper planning process she would have been able to resolve most of the issues that she encountered before they were a problem. 2a. Steven failed to do several things as a Project Manager. He failed to deliver the product on time and within budget, as well as managing expectations. His failures were a result of poor planning, prompt or advance requesting of resources, and a failure to communicate with his team, management and the end user. Steve's job as the PM is to monitor progress, ensure key stakeholders keep their people focused on the task and prevent delays, or if delays occur communicate those issues to management. Managing stake holders and keeping them focused on requirements and due dates goes a long way towards preventing problems. Steve seems to have failed at this. 2b. Using the creeping requirements as an excuse seems to be a mistake as it implies project mismanagement. If the project had been properly monitored scope creep could have been detected early and managed. 2c. As the PM, Steven should have been aware of what was occurring in the project always. Burying problems prevents them from being brought into the light, analyzed and solved quickly. The adage that Problems don't get better with time rings true here. Giving problems their due attention ensures that they can be fixed promptly and ... Get more on HelpWriting.net ...
  • 58. Essay On State Of Matter All matter can move from one state to another. It may require extreme temperatures or extreme pressures, but it can be done. Sometimes a substance doesn't want to change states. You have to use all of your tricks when that happens. To create a solid, you might have to decrease the temperature by a huge amount and then add pressure. For example, oxygen (O2) will solidify at –361.8 degrees Fahrenheit (–218.8 degrees Celsius) at standard pressure. However, it will freeze at warmer temperatures when the pressure is increased. Some of you know about liquid nitrogen (N2). It is nitrogen from the atmosphere in a liquid form and it has to be super cold to stay a liquid. What if you wanted to turn it into a solid but couldn't make it cold enough ... Show more content on Helpwriting.net ... There are many other types of molecular organizations in solid water than we can talk about here. CHEMISTRY TERM PHASE CHANGE Fusion/Melting Freezing Vaporization/Boiling Condensation Sublimation Deposition Solid to a Liquid Liquid to a Solid Liquid to a Gas Gas to a Liquid Solid to a Gas Gas to a Solid Solid to a Liquid and Back to a Solid Phase change of solid to a liquid when energy is added. Imagine that you are a solid. You're a cube of ice sitting on a counter. You dream of becoming liquid water. You need some energy. Heat is probably the easiest energy you can use to change your physical state. The atoms in a liquid have more energy than the atoms in a solid. There is a special temperature for every substance called the melting point. When a solid reaches the temperature of its melting point, it can become a liquid. For water, the temperature needs to be a little over zero degrees Celsius (0oC) for you to melt.
  • 59. If you were salt, sugar, or rock, your melting point is higher than that of water. How do you know that fact? If their melting points were lower, they would also be liquids when the temperature is above zero degrees Celsius. The reverse of the melting process is called freezing. Liquid water freezes and becomes solid ice when the molecules lose energy. Solid to a Gas and Back to a Solid Water vapor can become dew (liquid) or frost (solid) at night. You know ... Get more on HelpWriting.net ...
  • 61. Advantages And Disadvantages Of Frequency Modulation ANGLE MODULATION Chapter Objectives This chapter will help you to: 1. Define and explain the processes of frequency modulation (FM) and phase modulation (PM) and state their differences. 2. Calculate the modulation index given the maximum deviation and maximum modulating frequency, determine the significant number of sidebands in an FM signal, and calculate the bandwidth of an FM signal. 3. Define pre–emphasis and de–emphasis, state their benefits, and show how they are accomplished. 4. Name the advantages and disadvantages of FM and PM compared to AM. Angle modulation is a technique in which the angle of the carrier wave is varied according to the instantaneous amplitude of the modulating signal. There are two types of angle modulation. 1. Frequency Modulation 2. Phase Modulation Frequency Modulation: (Definition & Introduction) FM is a technique in which the instantaneous frequency of the carrier wave is varied according to the instantaneous amplitude of the modulating signal. In other words if the amplitude of the modulating signal increases, then there will be a corresponding increase in the frequency of the modulated wave, similarly if the amplitude of the modulating signal decreases, then there will be a corresponding ... Show more content on Helpwriting.net ... As can be seen in Figure 3.1 (a) the modulating signal increases from its negative peak value during this quarter, and at time t3 it becomes zero. This sinusoidal increase in the amplitude of the modulating signal is mapped on to the carrier signal by increasing its frequency. At time T3, the amplitude of the modulating signal is zero and hence there will not be any deviation in the carrier frequency from its original value. Thus between time T2 and T3, the frequency of the modulated carrier increases from its minimum value attained at time t2. This is shown in Figure 3.l(c) by inserting more cycles during quarter III as compared to the number of cycles that occurred during the quarter ... Get more on HelpWriting.net ...
  • 63. Advantages And Disadvantages Of Mm One of the major disadvantages of OFDM is the high Peak – to – Average power ratio of OFDM signal. These multi – carrier systems have a problem that Peak – to – Average power ratio increases with the increase of number of subcarrier, which causes poor efficiency or serious performance degradation to transmit power amplifier. Many PAPR reduction techniques have been proposed. These techniques can be mainly categorized into signal scrambling techniques and signal distortion techniques. In this topic, there is study OFDM system and short view of different PAPR reducing techniques like Clipping, Companding, Peak Windowing, Scrambling, Coding and Selective Mapping (SLM). Key Words: OFDM, PAPR, SLM, PTS, etc –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– ***–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– ... Show more content on Helpwriting.net ... Van Nee and Wild suggested peak windowing method. In this method it is possible to remove large peaks. Peak windowing reduces PAPRs as with respect to increasing the BER and out–of–band radiation. Clipping introduces PAPR reduction technique which is self interference The Peak windowing offers better PAPR reduction with better properties of spectrum. Peak Windowing technique provides better PAPR reduction with compare to clipping. [5] In peak windowing, multiplication of large signal peak with a specific window performed, for e.g.; Hamming window, Kaiser, Gaussian shaped, Cosine, etc.The output spectrum is a convolution of spectrum of the applied window with the original OFDM spectrum. Hence, the window should have to be as narrow band as possible, in opposition the window not be too long in the time domain because various signal samples are affected, this resulting increase in bit error rate (BER).[6] 4.1.2 Clipping and Filtering Technique Figure 2 – Block diagram of Clipping and ... Get more on HelpWriting.net ...
  • 65. Application Of Field Programmable Gate Array Proc. of the Second Intl. Conf. on Advances in Computer, Electronics and Electrical Engineering –– CEEE 2013 Copyright © Institute of Research Engineers and Doctors. All rights reserved. ISBN: 978–981–07–6260–5 doi:10.3850/ 978–981–07–6260–5_25 "FPGA BASED SINGLE PHASE MULTILEVEL INVERTER" Ms. Anuja Murar Nazare Student M Tech (Digital Systems ) Rajarambapu Institute of Technology, Rajaramnagar–415416 Email ID:anu.333.me@gmail.com Abstract– The application of Field programmable Gate Array(FPGA) in the development of electronics circuit control scheme has drawn much attention lately due to its shorter design cycle, lower cost and higher density. This paper presents an FPGA based gate signal generator for single phase multilevel inverter employing an sinusoidal PWM switching strategy to control its output voltage. The XILINX FPGA based single phase multilevel PWM inverter was constructed by adding a bi– directional switches to the conventional bridge topology. The inverter can produce three and five different output voltage levels across the load. FPGA is chosen for the hardware implementation of switching strategy mainly due to its high computation speed that can ensure the accuracy of the instants that gating signals are generated. VHDL language is used to model the inverter switching strategies The PWM pulses was downloaded in FPGA(XC3S400PQ208) from Spartan 3. In addition to FPGA, Xilinx/modelsim software was used for simulation and verification of the proposed ... Get more on HelpWriting.net ...
  • 67. If Moon Phases Are Caused By The Shadow Of The Earth On... Predictions Model 1: "Moon phases are caused by the shadow of the Earth on the Moon" 1. If Moon phases are caused by the shadow of the Earth on the Moon, when there is a new Moon, it should lie directly behind the Earth. The sunlight would be completely blocked off from the Moon because of Earth's shadow. 2. If Moon phases are caused by the shadow of the Earth on the Moon, the Moon should be a full Moon for most of the lunar month because Earth will not cast a shadow on the Moon unless the Moon is behind the Earth. Model 2: "Moon phases are caused by different angles between the Moon, Earth and Sun" 1. If Moon phases are caused by different angles between the Moon and Sun, half–Moons should take place when the Moon is on either side of earth related to the sun (not in between the sun and earth, and not behind the sun and earth). 2. If the Moon phases are caused by different angles between the Moon and Sun, the Moon is full for only a small fraction of the lunar month because it would only be full when it is behind the Earth and Sun. Analyze ... Show more content on Helpwriting.net ... An obvious pattern of the Moon is how each phase lasts for an equal duration, besides new, quarter, or full Moons. The phases show how the Moons orbit around the Earth is a constant speed. With the phases being equally divided up, it proves one of the predictions above wrong. The Moon is not a full Moon for the majority of the month, for the chart shows it is only a full Moon for one night. The percent of the Moon shown over the period of the month almost constantly changes, but the charts do show right before a full Moon or new Moon the percentage change of the Moon visible gets ... Get more on HelpWriting.net ...
  • 69. Obstetric Behavior Analysis Whenever a physiotherapist wants to create a general treatment protocol, she can rely on the ontology to select the exercises for each phase. Once the number of phases of the protocol has been defined alongside the conditions of each phase, a new set of classification rules for the selection of candidate exercises are created. Then, one ontology class is created automatically for each phase of the protocols based on the classification rules (Fig. 35d). For example, class CandExe2FlexGlenoJ represents the candidate exercises for phase 2 of the protocol for patients with limited flexion of the glenohumeral joint. Each of the Mov* classes in the definition refer to the movements that the exercise must have to be classified in CandExe2FlexGlenoJ. ... Show more content on Helpwriting.net ... 32c are taken into account, patient patient2015 would be classified as a Patient2FlexGlenoJ, because he has reported a VAS value of 0.0 (< 3.0) and there exists in his current physiotherapy record a movement exploration of flexion of the glenohumeral joint where he achieved a ROM of 80° (which satisfies conditions of the class MovExploFlexGJLessThan90). Beware that the classification of the patient evolves alongside his evolution in the therapy: if after being in phase 2 and performing the exercises recommended for that phase the aforementioned ROM increases to 100° and the patient reports no pain when performing those exercises, the patient would no longer be classified as a patient of phase 2, but as a patient of phase 3 (see definition for Patient3FlexGlenoJ). 3.3.1.5 Experts' domain knowledge (KiReSOnt) TrhOnt also includes axioms that reflect specific knowledge about characteristics of recommended (and contraindicated) exercises depending on patient's state. The ontology is also regarded as a means to identify which exercises are most suitable for a patient at some specific moment given all the information that it is known about him. Three cases are considered: 1) Recommended exercises due to classification in one phase of a protocol: as each patient is classified in a phase of a protocol the exercises that were select–ed for that phase are recommended for the ... Get more on HelpWriting.net ...
  • 71. Observation of Moon’s Phases Essay The moon is by far the biggest and most easily recognizable object in earth's atmosphere that can be perceived by the naked eye on a cloudless night. It is hypothesized that it came into existence nearly 4.5 billion years ago, from residual debris after a planetary body collided with earth. Although, considered the runner–up to the sun as the second brightest object in the sky, its illumination is deceitful, insomuch as the moon is not a source of light, but instead reflects the sun's illumination from the half of the moon that is in direct alignment with the sun at that time. More readily identified as a satellite of the earth rather than as a planet itself or even a star, it has a diameter a quarter of the size of earth's size and it ... Show more content on Helpwriting.net ... In the full moon phase the side of the moon that can be observed from earth becomes illuminated by the sun n its entirety. Lastly, the aforementioned illuminated portion begins to shrink or wane and thus the moon is considered to be in the waning gibbous phase, meaning that the illuminated portion is constricts in size or diameter every day. Astrological calendars have been in existence since ancient times where time was measured according to the number of Moons that had passed in a certain period, or in consonance with the shadows that were cast by either the Sun or Moon. Solar years are calculated based on the sun's motions, whereas lunar years are mutually based on the moons motions. A lunar year consists of approximately 354 days, whereas there are 365 days in solar year. By virtue of the eleven day disparity between a solar and lunar year, an additional month is added to the lunar calendar every three years, and as for the solar calendar, every fourth year, a leap day is added to the month of February. A lunar year is comprised of twelve lunar months, which corresponds to the time that elapses as the moon carries out each of its phases and proceeds to its position of origin. In contrast, a solar month is one twelfth of a solar year, given that a solar year is span of time that elapses as the Earth completes a single revolution around the sun. Despite the peculiar weather patterns that befell the ... Get more on HelpWriting.net ...
  • 73. Xilinx Fpga Based Pwm Technique For Controlling Multilevel... XILINX FPGA based PWM technique for controlling Multilevel Inverter Abstract––Multilevel inverter finds its application in high voltage high power converters. Various topologies of multilevel inverter provides several advantages such as high efficiency, low voltage stress, low EMI, better waveform and improved THD. This paper presents the development of Xilinx FPGA as a control circuit for generation of the pulse width modulation (PWM) signal for the single–phase cascaded H–bridge multilevel inverter and modified H–bridge PWM multilevel inverter. The XILINX FPGA based modified multilevel PWM inverter was implemented by adding bi–directional switches to the conventional bridge topology. Xilinx System Generator/MATLAB software has been used for simulation and verification of the proposed circuit before implementation. Index Terms– Field programmable gate array (FPGA), Cascaded H–bridge multilevel inverter, Pulse width modulation (PWM), Xilinx System Generator. INTRODUCTION Pulse width modulation technique based cascaded multilevel inverters have been receiving increasing research attention in the past few years. These power converters provide advantages of high power quality waveforms, low switching losses, and high–voltage capability. It has led to many applications such as high–power motor drive, variable speed drive, Uninterruptible Power Supply and active power line conditioners. The various topological structures of the multilevel inverter suggestions ... Get more on HelpWriting.net ...
  • 75. Pros And Basics Of Tom Brimeyer's Hypothyroidism Tom Brimeyer Hypothyroidism RevolutionHi and welcome to our review on the Hypothyroidism Revolution by Tom Brimeyer. Like always, this review will be divided into three main parts: 1. The basics section that will help you to understand better what the Hypothyroidism Revolution is all about. 2. The pros and cons section which includes the most important advantages and disadvantages that we feel you have to know about Tom Brimeyer's Hypothyroidism solution. 3. The conclusions section about the Hypothyroidism Revolution that summarizes our thoughts on this program... Let's begin :) The Basics In simple words, "The Hypothyroidism Revolution" is a comprehensive program that teaches you step–by–step how to reverse and stop hypothyroidism naturally and permanently. Tom Brimeyer, a long term sufferer of hypothyroidism, a fitness and health researcher, and the creator of The Hypothyroidism ... Show more content on Helpwriting.net ... In this phase Tom Brimeyer shows you how elements of a healthy lifestyle can be incorporated, including special exercises that can help with boosting your thyroid. He also goes into more detail about common mistakes that should be avoided so that you can achieve optimal results from the program. All the explanations about these three phases are found inside the main guide of the Hypothyroidism Revolution system, which contains more than 160 pages and 16 chapters. However, the Hypothyroidism Revolution program contains many more components, as we will explain in the pros and cons section below... Click On This Link For More Details About The Hypothyroidism Revolution Main Guide And The 3–Phase Treatment Plan That Tom Brimeyer Describes Inside!
  • 76. The Pros And Cons The Pros A Program That Is Very ... Get more on HelpWriting.net ...
  • 78. Production Mitigation : Line Harmonics Can Have Costly And... Harmonics Mitigation Line harmonics can have costly and disruptive effects on electrical distribution system. At present there are several reduction or mitigation methods in use to reduce the distortion of the voltage and current from non–linear distribution loads such as variable frequency drives (VFDs). Description of each method with relative advantages and disadvantages are as follows. No method used The adjustable frequency drive requirements for IEEE 519 1992 guidelines may not be met without a line reactor or additional impedance because many AFDs require a minimum of 1% to 3% input impedance. IEEE 519 1992 guidelines may not be met even if the total connected AFD or VFD loads are less than 10%. It is assumed that the AFD has a six–diode input bridge and no line reactor, filter or DC choke applied. Advantages: No additional cost The VFDs are easy to package The AFDs are easy to sell and apply. Disadvantages: There may be a possibility of high levels of harmonic voltage and current distortion. Line transients can cause damage to the VFDs. AFD impedance requirement may not be met. DC Choke On the front end of the adjustable frequency drive, a series inductance on the DC side of the semiconductor bridge circuit is called a DC choke. An equivalent AC–side line reactor is comparable to the DC choke, except that the THD of DC choke is less than that of the AC counterpart. A greater reduction of the 5th and 7th harmonics, primarily, is provided by the DC ... Get more on HelpWriting.net ...
  • 80. ____________________________________ .. W E B S T E Ru ____________________________________ W E B S T E R U N I V E R S I T Y Center for Graduate and Professional Studies ____________________________________ MID–TERM EXAM Chapters 1–6 Student Name: David McNamee__ Open Book Exam 1a. The phases that Jeannine skipped are 1. The systems analysis and requirements phase 2. The systems design phase 3. The implementation phase and 4. Operations and Maintenance phase (Systems support and security). 1b. When Jeannine skipped the system analysis phase, she failed to analyze the needs of the end user and whether the system she came up with would meet her final requirements. Although Jeannine incorrectly believes she knows what is required she is unaware that the financial comptroller ... Show more content on Helpwriting.net ... The misconception that a system can be quickly thrown together that will meet all the requirements of an organization and its clients is common. 1d. The conclusions that can be drawn from Chapter 2 lead me to believe that Jeannine can be taught to plan strategically and that she can also learn why it is important to do so. Had Jeannine followed the proper planning process she would have been able to resolve most of the issues that she encountered before they were a problem. 2a. Steven failed to do several things as a Project Manager. He failed to deliver the product on time and within budget, as well as managing expectations. His failures were a result of poor planning, prompt or advance requesting of resources, and a failure to communicate with his team, management and the end user. Steve's job as the PM is to monitor progress, ensure key stakeholders keep their people focused on the task and prevent delays, or if delays occur communicate those issues to management. Managing stake holders and keeping them focused on requirements and due dates goes a long way towards preventing problems. Steve seems to have failed at this. 2b. Using the creeping requirements as an excuse seems to be a mistake as it implies project mismanagement. If the project had been properly monitored scope creep could have been detected early and managed. 2c. As the PM, Steven should have been aware of what was occurring in the project always. ... Get more on HelpWriting.net ...
  • 82. Experiment: What Causes The Phases Of The Moon INVESTIGATION PLAN PROBLEM What causes the phases of the moon? Another question is, "How does the phase of the moon affect the amount of stars visible in the night sky?" HYPOTHESIS My hypothesis is that the phase of the moon is because when the sun's rays hit different parts of the moon different "shapes" appear. A second hypothesis is since the moon reflects the sun's light, the phase of the moon effects the number of stars visible in the dark sky. PROCEDURE To begin this experiment, I will purchase binoculars from an online website. A fully charged camera and computer are also items I will need. Setting the camera to the floral view and 28 mm you will get a much better photo of the moon and the surrounding stars. I will take a ... Get more on HelpWriting.net ...
  • 84. Data Partition Properties And Its Structure For Preparing... Map/Reduce is a structure for preparing parallelizable issues crosswise over gigantic datasets utilizing a substantial number of PCs (hubs), all things considered alluded to as a group i.e. if all hubs are on the same local network and use the same hardware) or a framework i.e. if the hubs are shared crosswise over geologically and authoritatively conveyed systems, and use a more heterogenous hardware. Handling can happen on data saved either in a file system – unstructured or in a database – organized. Map/Reduce can exploit domain of data, preparing it on or close to the storage resources with a specific end goal to reduce the length over which it must be transmitted. Jiaxing et al. proposes SUDO, an advancement system that reasons about data partition characteristics, working properties, and data shuffling. They contend that reasoning about data partition properties crosswise phases opens up chances to reduce extravagant data shuffling. For instance, in the event that we realize that data partitions from past computation phases as of now have alluring properties for the following phase, we have the method to stay away from superfluous data shuffling steps. The fundamental obstruction to reasoning about data partition properties crosswise over processing phases is the utilization of UDFs [4]. At the point when a UDF is viewed as a "black–box", which is typically the case, we must expect conservatively that all data partition characteristics are lost subsequent to applying ... Get more on HelpWriting.net ...