Lens Antenna an antenna whose directivity pattern is a result of the difference between the phase velocity of propagation of an electromagnetic wave in air and that in the lens material. Lens antennas are used in radar and metering equipment that operates in the centimeter wavelength range. A lens antenna consists of a lens proper and of a feed. The shape of the lens depends on the refractive index n (the ratio of the phase velocity of propagation of a radio wave in a vacuum to that in the lens)
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alleviating traffic congestions Uber is an online transport network service company which is used to launching a website that will display how its cars that moves around the cities. The effort was made to launch to pacify the city powers that have the long service called for more data sharing. The Uber services are planned provide data on a number of cities and this will establish from the next month‚ it will. The transportation data could help the cities to make much better the traffic congestion in a
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Traffic Congestion Traffic congestion is a condition on road networks that occurs as use increases‚ and is characterized by slower speeds‚ longer trip times‚ and increased vehicular queuing. The most common example is the physical use of roads by vehicles. When the traffic demand is great enough that the interaction between vehicles slows the speed of the traffic stream‚ this will results in some congestion. As demand approaches the capacity of a road (or of the intersections along the road)‚
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Proceedings of the 17th Annual Conference of the Transportation Science Society of the Philippines (2009) ITS: Traffic Baseline Information Obtained Using Probe Cars is the Key to Address Metro Manila Traffic Congestion Reigna Jewel Ritz M. MACABABBAD Graduate Student Institute of Civil Engineering College of Engineering University of the Philippines Diliman‚ Quezon City E-mail: rjmmacababbad@gmail.com Jose Regin F. REGIDOR‚ Dr. Eng. Associate Professor Institute of Civil Engineering College
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developing country. We have to face with many problems; one of which is traffic. Accident transport and the congestion of traffic are becoming serious day by day Traffic accidents in Vietnam have been increasing at the alarming growth rate in the recent years. In 2008‚ there are more than 10.000 dead. The number dead from traffic accidents is much more than the number dead of cancer. The main reason is poor awareness of traffic participants such as driving after drinking wine‚ not wearing helmets
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Traffic: A difficult question. Vietnam is a developing country. We have to face with many difficulties‚ and traffic is one of the most vital problems that should be solved immediately. Since accident transport and traffic congestion are becoming serious day by day is the real situation in our country‚ the Government has introduced a new law that is charging vehicles going into city. However‚ I believe that charging vehicles cannot solve traffic problems‚ but changing people awareness and improving
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Problems in Air Traffic Control and Proposed Solutions In northern California this summer‚ the Federal Aviation Administration (FAA) unintentionally performed it’s first operational test of "free flight"; aviation without direct air traffic control. This was an unintentional experiment because it was a result of a total shut-down of the Oakland Air Route Traffic Control Center (ARTCC). Although Oakland is only the 16th busiest ARTCC‚ it’s responsible for the largest block of airspace of
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English 102 – Term Report English Language Department (ELD) The Problem of Congestion in Riyadh and some Solutions Student: Hussain AlMoslim ID: Section: S/N: Instructor: Anthony Gibson The Problem of Congestion in Riyadh and some Solutions INTRODUCTION I. BACKGROUND A. Background for the Problem of Congestion in Riyadh ……… 3 B. Accident Statistics ……………………………………………… 4 II. THE CAUSES OF THE PROBLEM A. Weather and Bad Infrastructure ………………………… 4 B. The Increase in Population ....……………………………
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EUROPEAN CONFERENCE OF MINISTERS OF TRANSPORT R E S E A R C H C E N T R E MANAGING URBAN TRAFFIC CONGESTION Summary Document T R A N S P O R T JOINT TRANSPORT RESEARCH CENTRE In January 2004‚ the Organisation for Economic Co-operation and Development (OECD) and European Conference of Ministers of Transport (ECMT) brought together their transport research capabilities in setting up the Joint Transport Research Centre. The Centre has 50 full members from Asia-Pacific‚ Europe and
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Atmospheric Pollution in Beijing and the Solution Based on Traffic Planning Xu Zhao JRSB101‚ Communications I Jackie Quantz‚ Instructor December‚ 02‚ 2010 Summary The following report introduces the main reasons of air pollution in Beijing - Coal burning and auto emissions. Also‚ the report analyzes the current situation of Beijing - private vehicles increased rapidly in recent years and public traffic cannot meet the demand of public transportation. Comparing Beijing with
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