around in the clouds (Hatheway‚ Becca. “Weather Radar”) The way that a radar works is a transmitter will send pulses out and then waves or echoes will be transmitted back on to a screen to show if and where an object is in relation to the radar. The reason why the computer is able to know how far away an object is; is by measuring how long it takes for radar waves to come back to transmitter. This method is useful to both the military and the meteorologist. The military is able to benefit
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transparent dielectrics. • Its function is to guide visible and infrared light over long distances. Structure of optical fiber • Core – central tube of very thin size made up of optically transparent dielectric medium and carries the light form transmitter to receiver. The core diameter can vary from about 5um to 100 um. • Cladding – outer optical material surrounding the core having reflecting index lower than core. It helps to keep the light within the core throughout the phenomena of total internal
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Smart solutions overview of street light system in TI grounding system There are many of electrical equipment which can be accessed by the public; however‚ some of them cannot be physically controlled by the operator. One of them is street light system which needs to be protected in order to prevent shock hazards under the fault conditions. Generally‚ street lighting systems are distributed in a large area including urban and sub urban. If fault happens‚ the metal case of these systems might raise
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The biggest controversy of the deaf community has been the topic of a cochlear implant. The debate is centered around the expense‚ risk and idea of the implants causing deaf people to distance themselves from the deaf community rather than emerging themselves. This is due to the cochlear implants ability to provide a sense of sound to the deaf individual. It is only used when a hearing aid is not strong enough to provide adequate function. The cochlear implant involves a lot of time to consider the
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ADVANCES IN COOPERATIVE WIRELESS NETWORKING: PART 2 Cooperative Network Coding in Relay-Based IMT-Advanced Systems Mugen Peng‚ Changqing Yang‚ Zhongyuan Zhao‚ and Wenbo Wang‚ Beijing University of Posts and Telecommunications Hsiao-Hwa Chen‚ National Cheng Kung University ABSTRACT Cooperative network coding has been proposed as an effective solution to improve system performance. Through collaborative network coding in the intermediate node(s) instead of direct forwarding‚ the transmission
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word‚ radar‚ losing the capitalization in the process. Radar was originally called RDF (Radio Direction Finder) in Britain. Block Diag oF RADAR A radar system has a transmitter that emits radio waves that are reflected by the target and detected by a receiver‚ typically in the same location as the transmitter. Although the radio signal returned is usually very weak‚ radio signals can easily be amplified. This enables radar to detect objects at ranges where other emissions‚ such as sound
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frequency‚ or space. 3.1.1.4 Array gain Array gain is the average increase in the SNR at the receiver that arises from the coherent combining effect of multiple antennas at the receiver antenna or transmitter antenna or both. Basically‚ multiple antenna require perfect channel knowledge either at the transmitter or receiver or both to achieve good array gain. 3.2 Orthogonal Space Time Block Code (OSTBC) The transmit diversity scheme designed by Alamouti can be used only in a system with two transmit
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CRUISE CONTROL DEVICE INTRODUCTION Everyday the media brings us horrible news on road accidents. Once a report said that the damaged property and other costs may equal 3 % of the world’s gross domestic product. The concept of assisting driver in longitudinal vehicle control to avoid collisions has been a major focal point of research at many automobile companies and research organizations. The idea of driver assistance was started with the ‘cruise control devices’ first appeared in 1970’s
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Linear Model of Communication It is a one way model to communicate with others. It consists of the sender encoding a message and channeling it to the receiver in the presence of noise. Draw backs – the linear model assumes that there is a clear cut beginning and end to communication. It also displays no feedback from the receiver. • For example; a letter‚ email‚ text message‚ lecture. There are two main linear model which are used to explain the human communication process. They are .
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microwaves through a plane convex convergent lens is observed and the focal distance of the lens is determined. After that‚ polarizability of micro waves is demonstrated by means of a metallic grating. What you need: U in mV Microwave transmitter with clystron 11740.01 1 Microwave receiving dipole 11740.03 1 Microwave power supply‚ 220 VAC 11740.93 1 Universal measuring amplifier 13626.93 1 Polarisation grid 06866.00 1 Convergent lens‚ synthetic
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