the introduction of contaminants into a natural environment that causes instability‚ disorder‚ harm or discomfort to the ecosystem i.e. physical systems or living organisms.[1] Pollution can take the form of chemical substances or energy‚ such as noise‚ heat‚ or light. Pollutants‚ the elements of pollution‚ can be foreign substances or energies‚ or naturally occurring; when naturally occurring‚ they are considered contaminants when they exceed natural levels. The major forms of pollution are listed
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additive noise is characteristic of almost all communication systems. This additive noise typically arises from thermal noise generated by random motion of electrons in the conductors comprising the receiver. In a communication system the thermal noise having the greatest effect on system performance is generated at and before the first stage of amplification. This point in a communication system is where the desired signal takes the lowest power level and consequently the thermal noise has the
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Report of assessment of Noise Pollution survey in Kolkata during Kali puja & Diwali Festivals- 2005 Introduction: The use of loudspeakers is regulated in terms of the Rules under the Environment Protection Act (1986) as well as the orders of the Supreme Court and the Calcutta High Court. The Police is empowered to enforce these rules and the orders. While the legal restrictions are mostly known by and large‚ special vigilance becomes necessary during festivals such as the Durga Puja‚ Kali Puja &
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LNA Design Iulian Rosu‚ YO3DAC / VA3IUL http://www.qsl.net/va3iul/ An LNA combines a low noise figure‚ reasonable gain‚ and stability without oscillation over entire useful frequency range. The Low Noise Amplifier (LNA) always operates in Class A‚ typically at 15-20% of its maximum useful current. Class A is characterized by a bias point more or less at the center of maximum current and voltage capability of the device used‚ and by RF current and voltages that are sufficiently small relative
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“A Powerful Noise” was a moving documentary about the hardships women face across the globe focusing on three key issues‚ HIV‚ lack of education and economic hardship. From this documentary some clarity I received really opened my eyes to how these issues affect women around the world. I learned that HIV is not primarily spread through sexual intercourse but rather through sharing needles in impoverished countries. I was always aware that sharing needles is a way of obtaining
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School of Communications Technology and Mathematical Sciences Digital Signal Processing Part 3 Discrete-Time Signals & Systems Case Studies S R Taghizadeh <srt@unl.ac.uk> January 2000 Introduction Matlab and its applications in analysis of continuous-time signals and systems has been discussed in part 1 and 2 of this series of practical manuals. The purpose of part 3 is to discuss the way Matlab is used in analysis of discrete-time signals and systems. Each section provides a series of worked
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Prof. BERESFORD TALK ABOUT THE PROBLEMS OF POLUTION (Tape script‚ slightly abridged) Pollution is today‚ probably‚ the greatest problem that faces mankind. There is a saying in English that it is an ill bird that fouls its own nest. And human beings are‚ collectively speaking‚ fouling their nest at the increasing rate. It is an alarming picture. We are polluting the air‚ which we need to breathe‚ the earth from which we derive all our food‚ and the waters from which wе‚ of course‚ derive the
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alcohol‚ misunderstanding speech‚ body language‚ emotional difficulties‚ health issues and sensory factors. In health and social care settings there are strategies used to overcome these barriers. Some strategies may be more effective than others. It is important to know the strategies and be able to overcome these barriers in health and social care settings because there are many situations where communicating with a person may not be easy. Environmental- It can be hard to communicate if there is a problem
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rising every day. Delhi has the maximum number of vehicles in the world. The poisonous gases coming out of these vehicles are making the environment more polluted. Besides the blowing of horns‚ rumbling of factories and noises from the loudspeakers and vehicular movements are causing noise pollution as well. The pollution has been an important cause of various diseases like high blood pressure‚ asthma‚ skin problem and respiratory disorders. Migration is also major cause of pollution. Every day a large
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Describe the barriers of effective communication. Introduction: If an individual (Sender) sends a message and the receiver interprets it in the same way as the sender had intended to express‚the process of communication is said to be complete. But it is not always so. Certain barriers in communication affect the clarity‚ accuracy and effectiveness of the message. The barriers could be related to the communication system‚ mechanical devices being used‚ language or symbols being used
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