AUTOMATIC RAILWAY SIGNAL A PROJECT REPORT Submitted by VAHALUWALA SUHEL R. SHETH HARSHIL R. PATEL KASHYAP A. TANDEL JAY S. TANDEL RAJ B. In fulfillment for the award of the degree of BACHELOR OF ENGINEERING in ELECTRICAL ENGINEERING Mahatma Gandhi Institute Of Technical Education And Research Center‚ NAVSARI Gujarat Technological University‚ Ahmedabad May‚ 2012 ELECTRICAL ENGINEERING DEPARTMENT 2012 Certificate This is to certify that the dissertation entitled
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Haley‚ Jennifer Professor Underwood Phsc 2010-A05 Elements of Earth Science November 6‚ 2013 Short Report on Tornadoes Introduction A tornado is defined as a violently rotating column extending from a thunderstorm to the ground. A violent tornado is capable of enormous amount of destruction with wind speeds up to 300 miles per hour. The tornados can reach up to one mile wide and fifty miles long. A report I read said in an average year‚ 1‚500 tornados are
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CDMA system. There are four parts to simplex transmission. 1. Transmitter: The data is first encoded using a unique code called PN sequence (discussed in detail on next page) and then RF modulated. The final signal is the transmitted through a physical channel. 2. Receiver: The incoming signal is first RF demodulated then decoded to get the intended signal. The decoding is again done using a unique code‚ same as transmitter. Figure.1: Overview of CDMA Simplex Transmission System PN Sequence
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CHAPTER I INTRODUCTION This chapter outlines the background to the study‚ the statement of the problem‚ objectives and the justification of the research. . 1.1Background Public utilities need a parking infrastructure that can function efficiently and be integrated with the other urban city utilities
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as in antique clocks and watches‚ can also be safely cleaned. Ultrasound for scanning is the most popular medical use. This is safer than using X-rays. Unborn babies can be seen by moving an ultrasonic transmitter across the mother’s stomach. The sound waves will be projected from the transmitter and the waves are able to travel from one part of the human being to the other. As it hits a tissue or an organ‚ some waves reflects and gives of echos which can build up a picture on the TV screen. The
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speakers connected in series have a total impedance of_. a) 2Ω b) 4Ω c) 8Ω d) 6Ω 89. What determines the rate of frequency swing for an FM broadcast transmitter? a) Modulation amplitude b) Modulation frequency c) Carrier amplitude d) Carrier frequency 90. What is the frequency swing of an FM broadcast transmitter when modulated 60%? a) ±75 kHz b) ± kHz c) ± kHz d) ± kHz 91. (Nov 1997) A large speaker having a large diameter (15cm. and above) a) Coaxial speaker
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chapter 1 introduction 1.1GENERAL With the increasing denial of time and space the RFID technology is gaining momentum day by day. RFID is a source of identification of individuals and unique products. The budding technology RFID proves to threaten even the cloning technique‚ through the chip insertion. New ways of improving the existing RFID technology are being found and implemented. This advancement of RFID technology is looked beyond the security purposes. 1.2 PRESENT SCENARIO
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Transmission Media • Transmission medium – Physical path between transmitter and receiver – May be guided (wired) or unguided (wireless) – Communication achieved by using em waves • Characteristics and quality of data transmission – Dependent on characteristics of medium and signal – Guided medium ∗ Medium is more important in setting transmission parameters – Unguided medium ∗ Bandwidth of the signal produced by transmitting antenna is important in setting transmission parameters ∗ Signal directionality
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The radio waves travel through air until they reach a base station close by. The base station sends the call across the communication network after which the call reaches the intended receive Landline telephones use voice transmission where the transmitter and receiver are located in the handset. Powered by the line‚ the microphone produces an electrical current which varies its frequency and amplitude in response to the sound waves arriving at its diaphragm. The resulting current
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service at 6.30 pm with “tea dance music from the Selangor Club”. A talk on the activities of the radio club was also transmitted that night. For this and subsequent broadcast‚ the group was allowed the use of the Post and Telegraph Department transmitter located at Petaling Hill. The station had been constructed in 1928 and then rebuilt the following year to make it permanent installation. This was the central station in the Malayan telegraphic network‚ but the amateurs managed to convert it to
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