...V |Team 4: Adam Winterstrom | | |Cheng-yu Chang | | |Thuan Dinh |EE175WS00-4 | | |June 14,2000 | Quarter Wavelength Microstrip Antenna for Communication between Vehicles Final Report Technical Advisor: Alex Balandin Project Advisor: Barry Todd Table of Contents Executive Summary………………………………………………………………..3 Keywords……………………………………………………………………………3 Introduction………………………………………………………………………….4-6 Problem Statement…………………………………………………………………6 Possible Solutions…………………………………………………………………..7-8 Solution……………………………………………………………………………….9-13 Engineering Analysis………………………………………………………………..14-15 Discussion of Results………………………………………………………………..16-25 Conclusions and Recommendations……………………………………………….22-23 References……………………………………………………………………………25-26 Appendix………………………………………………………………………………26-46 Executive Summary: A low profile...
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...Aperture Theory And The Equivalence Theorem Adriaan J. Booysen, Member, IEEE Grintek Avitronics, P 0 Box 8492, Centurion, 0046 I. INTRODUCTION The equivalence theorem [I] provides an elegant method for analysing electromagnetic radiation and scattering from structnres. A specific class of problems is where a source is enclosed within a structure which forms a cavity with an aperture, as depicted in Figure 1. From a radiation point of view, the fields wilhi the cavity are not of any rcal interest, only thc 'external' fields radiated from the apermre. If the field distribution in the aperture is known (even if only approximately),this n priori knowledge can be exploited to limit calculations to the 'external' part of the problem This technique is commonly referred to as 'aperture theory' and is discussed in many antenna textbooks, e.g. [2]. This paper deals with the methods in which the equivalent apermre current densities are incorporated into the surface equivalence theorem. It will be shown that the application of image theory to problems involving radiation hom apertures in half-spaceis incorrect and that the conventional formulation of apelture theory violates a basic condition of the equivalence principle. A new apermre theory formulation is presented. The method is very simple to implement and will be shown to be exact in as far as the exact aperture fields are known. II. THE SURFACE EQUIVALENCE THEOREM REVISITED Consider Love's external equivalence as discussed...
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...which is a quarter-wavelength long 58. If the length of a Hertz dipole is decreased A. its resonant frequency will be lowered its distributed inductance will be increased B. its distributed inductance will be decreased C. its resonant frequency will be increased D. its distributed capacitance between the antenna and ground will be increased. 59. A final amplifier of a radio transmitter draws 250 mA of plate current when the plate supply voltage is 1400 volts. If the plate circuit efficiency is 80% and the transmitter is connected...
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...OBJECTIVES……………………………………………………………………………………………………….5 SCOPE OF THE PROJECT/SPECIFICATIONS……………………………………………………………………….6 BLOCK DIAGRAM……………………………………………………………………………………..…………………….6 DESCRIPTION OF THE BLOCK DIAGRAM………....………………………………………………………………7 CHAPTER TWO………………………………………………………………………………………………………………….…………………8 2.1 2.2 2.3 EXISTING SOLUTIONS……………………………………………………………………………………………………..8 LITERATURE REVIEW………………………………………………………………………………………………………9 CONCLUSION……………………………………………………………………………………………………………….10 CHAPTER THREE……………………………………………………………………………………………………………………….……….11 HARDWARE IMPLEMENTATION………………………………………………………………..…………………….………..11 3.0 3.1 COMPLETE CIRCUIT DIAGRAM………………………………………………………………………………………11 POWER SUPPLY AND ZERO CROSS DETECTION UNIT CIRCUIT……………………………….………11 3.1.1 3.1.2 3.1.3 3.1.4 3.1.5 3.2 ZERO CROSS DETECTING UNI……………………………………………………………..13...
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...between network and host bits. It was assumed that the first eight bits were the network. This only offered 254 networks. Many organizations didn’t need 16,777,214 host addresses, and over time it was obvious that we needed not only different sizes of networks, but more of them. In 1981 a new way to partition the bits of an IP address was put into use. In order to be able to easily see which bits were network and which were host, a class system was defined. (Sharma, 2011) The IANA has set rules that are followed worldwide to allow international use of the internet and intranets. Using the knowledge that an octet can only show numbers between zero and 255, classes were developed for the numbers that designate a network, which has nodes - or devices - within it. Class A networks are ones that the first octet starts with binary digit zero, so 00000001 to 01111111 or 1 to 127. It is accepted that 127.0.0.0 is not used as an IP network. It is only used within your computer, often as a loopback address to ascertain whether TCP/IP is properly installed and functional. As part of the definition of a...
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...of moving objects in a straight line on the rotating coordinate system. In fact no actual body deviates from a straight line, but it seems also because of the movement of the surface actually below. Commensurate Coriolis force on the ground with the sine of the latitude at the site. Where such a force equal zero at the equator and reach the maximum at the poles. The method Merry Go-Round (Tempozan) of the best and simplest ways to get to know the amount of the Coriolis force and unique direction. Stand near the outer edge of the rotary swing slow rotation so that they are in the face of the middle of it, taking care to hold strongly in the bars every time. If you try to tilt forward in the direction of the center, you will feel a kind of side force - the Coriolis force. But commensurate amount of this force with speed Tempozan and tilt forward speed. Alternatively, try to roll the ball on the length of a quick swing rotation, as shown in this film on the University of Illinois. Affecting also the phenomenon of the Coriolis Effect on the weather patterns. It is known that the wind caused by the movement of air from a high pressure areas to a low-pressure areas. If the land is fixed, this movement will be in a straight line, but on the ground roller, the Coriolis effect tends to work to turn the direction of the wind in the...
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...Introduction Social institutions (e.g. family, religion, education, economic, and political standings) are a set of standards or patterns used to govern within a society. In many cases, this used to rule over others like when it comes to wealth and hierarchy. These social institutions are critical because they provide some type of structure for society. Nevertheless, not all systems of structure are proper. Many of these behaviors that are used to control others, or hold a type of power over others so they can be exploited. Unbreakable: One Girl Changing the World: The Story of Malala This is a story of a brave girl who is eager to learn; who simply wanted to better herself through education. Within her culture, girls are not allowed to...
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...t year NATIONAL SENIOR CERTIFICATE GRADE 12 PHYSICAL SCIENCES: PHYSICS (P1) FEBRUARY/MARCH 2013 MARKS: 150 TIME: 3 hours This question paper consists of 15 pages and 3 data sheets. Copyright reserved Please turn over Physical Sciences/P1 2 NSC DBE/Feb.–Mar. 2013 INSTRUCTIONS AND INFORMATION 1. Write your centre number and examination number in the appropriate spaces on the ANSWER BOOK. This question paper consists of TWO sections: SECTION A SECTION B 3. 4. 5. 6. (25) (125) 2. Answer ALL the questions in the ANSWER BOOK. You may use a non-programmable calculator. You may use appropriate mathematical instruments. Number the answers correctly according to the numbering system used in this question paper. YOU ARE ADVISED TO USE THE ATTACHED DATA SHEETS. Give brief motivations, discussions, et cetera where required. Round off your final numerical answers to a minimum of TWO decimal places. 7. 8. 9. Copyright reserved Please turn over Physical Sciences/P1 3 NSC DBE/Feb.–Mar. 2013 SECTION A QUESTION 1: ONE-WORD ITEMS Give ONE word/term for each of the following descriptions. Write only the word/term next to the question number (1.1–1.5) in the ANSWER BOOK. 1.1 The type of electromagnetic radiation that is used to take pictures of the human skeleton The product of mass and velocity The principle which states that each point on a wave front acts as a source of secondary waves The unit of measurement equivalent to a coulomb per...
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...“God Particle” What is the Higgs boson and the Higgs field? The Higgs field has been described as a kind of cosmic "treacle" spread through the universe. According to Prof Higgs's 1964 theory, the field interacts with the tiny particles that make up atoms, and weighs them down so that they do not simply whizz around space at the speed of light. But in the half-century following the theory, produced independently by the six scientists within a few months of each other, nobody has been able to prove that the Higgs Field really exists. Prof Higgs predicted that the field would have a signature particle, a massive boson. What would the world be like without the Higgs boson? According to the Standard Model theory, it would not be recognisable. Without something to give mass to the basic building blocks of matter, everything would behave as light does, floating freely and not combining with other particles. Ordinary matter, as we know it, would not exist. How long has the search gone on? Scientists have been looking for the Higgs since the 1960s, but the search began in earnest more than 20 years ago with early experiments at Cern in Europe and Fermilab in the US. Does finding the Higgs boson mark the end of the search? It's just the end of the beginning. Confirming the existence of the Higgs would only be the start of a new era of particle physics as scientists focus on understanding how it works and look for unexpected phenomena. How do you find a Higgs boson? To find...
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...Films on Demand: Sociology Collection: Social Institutions Andrea M., Britteny Bates, Chandra Roberts SOC/100 12/6/15 Dr. Virginia Merlini Social institutions such as that of family, religion, education, economic and political standings, are set standards or patterns of governing within society. In many cases, this is used to rule over others, in matters of wealth and hierarchy. These social institutions are important because they provide some structure for society. However, not all forms of structure are appropriate. Many of these behaviors are used to control others or hold a type of power over them as a way to exploit them. “Unbreakable: One Girl Changing the World: The Story of Malala” This is a story of a brave young girl, eager to learn, who simply wanted to get an education. However, within her culture, girls are not allowed to go to school. Females are expected to stay home and are only allowed to leave the house if they are accompanied by a male. From a functionalism standpoint, everyone has a role. Women are to stay home, have and raise the children and take care of the house. The males are responsible for going to work and supporting the family. In recent years, the Pakistani government has opened up more to the idea of educating girls and have even opened a few girl’s...
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...and Install Firmware 6 Connect to MavLink 7 Calibrating Hardware While connected to the APM Board 8 Accelerometer 8 Compass 9 Calibrating Hardware While Connected to the 3DR Telemetry Radio 11 Radio Calibration 11 Flight Modes 13 Battery Monitor 14 Airspeed Sensor 15 Flight Data Screen 17 Tuning your Airframe 19 Basic Tuning 19 PID’s (Proportional, Integral & Differential) 19 Period 20 Navigation Angles 20 Throttle 20 Airspeed 20 General Notes on Parameters 20 Recommended Process for Tuning When Starting with New Plane 21 Advice for Tuning: Poor Waypoint Reaction 22 Mission Planning 23 Recording and Playing Back Missions 24 First-time Flying Checklist 26 Ground Calibration 26 Launching in Auto Mode 26 Install Mission Planner * The link to install the Mission Planner software can be found at: http://ardupilot.com/downloads/?did=82 * The installation utility will install the necessary drivers. You will probably get the following warning. Select "Install this driver software anyway." * (Note: If you get a DirectX installation error, then your copy of Windows doesn't have an updated version of DirectX. Download that here: * http://www.microsoft.com/en-us/download/details.aspx?id=35 ) Installing firmware for ArduPilot Mega(APM) 2.6 * Once the software is downloaded, plug your APM board into your computer and wait for Windows to recognize it and install the right...
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...of deceleration due to friction. □ Assess the effect of mass on the car’s accelerated motion. DESIGN Hypothesis – A car moving in a straight line with a non-zero initial velocity will finally come to a rest as a result of friction, given that the car has no engine or external tractions. This motion can be considered as a uniform accelerated motion because: 1. The car is moving in a horizontal straight line so weight is cancelled by the normal reaction force from the ground. The only other force existed is the friction between the car and the surface therefore it will be equal to the net force 2. According to the formula Fr = μN, the amount of the friction depends on two factors: the friction coefficient and the normal reaction force, both of which are fixed. Therefore the amount of friction is constant throughout the motion 3. According to Newton’s Second Law F = ma, a constant net force will result in a uniform acceleration (deceleration). The acceleration is negative in this case as cars are slowing down to a rest. For convenience, this decelerated motion can be inverted into an equivalent motion in which the car is acceleration from rest. It should follow the equation of x = ut + 1/2 at2, where x = distance traveled, u = 0 (seen as the initial velocity but actually is the final velocity which is zero at rest), a = acceleration (actually deceleration) and t = time taken during that motion. This formula can be simplified as x = 1/2 at2. We will measure the variables...
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...Growing global concern over protecting our environment has prompted nations to band together to address the harmful impact of deforestation in Brazil. Global warming has become a reality, and deforestation has played a major part in its occurrence. Trees naturally absorb most of the carbon and greenhouse gases in our air, while simultaneously releasing oxygen. The removal of trees not only reduces the ability of carbon in our air to be absorbed, but it releases stored up carbon into the air, which is a contributing factor to global warming. Additionally, as the earth’s natural canopy is removed, nothing is standing between the sun’s rays and the ground, which is causing the ground to retain the heat from the sun. This leads to an increase...
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...the exercise book. The sample size of 4 is used in calculating the control limits and for determining the value of the statistical constants used in these calculations such as A2, D3,D4. The “number of samples” is 10 but the “sample size” is 4. The 10 samples will be plotted on a graph but the number 10 in this case is NOT used in the calculation of control limits when looking up the A2,D3, and D4 values. In this type of SPC BOTH graphs must be drawn and examined. If a SINGLE POINT on either graph exceeds the upper or lower control or range limits, the process is said to be “out of control”. If NO points exceed the range or control limits, the process is said to be “in control”. In addition the analyst will examine the graphs for patterns showing either expected random behaviour or the tendency towards an out-of-control condition. The QUALITY GURUS: Deming, Juran, Crosby, Taguchi, Feigenbaum were the...
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...These concerns focused on the extent to which police were stopping people on the highways for “driving while black. Additional concerns were raised about racial bias in pedestrian stops of citizens by police predicated on “zero tolerance” policies to control quality-of-life crimes and aggressive policing strategies concentrated in minority communities that targeted illegal gun possession and drug trafficking.” Due to members in society noticing the way in which the police have been treating minorities, this then lead to their being trust issues between members in society and those in law...
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