Figure 5.19 The mortar in unreinforced masonry walls such as these in Iran‚1990(A) can easily fail during an earthquake. Oftentimes the entire structure crumbles‚ leaving a pile of rubble in which survive. Shown in(B) is one of the many masonry homes to collapse during the 1988 Armenia earthquake (M6.9)‚ claiming nearly 25‚000 lives. The failure is called soft-story collapse. Soft-story collapse is a common problem in commercial building where the first floor has considerable open space for
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reflected wave. This system permits easy control of the reflection coefficient and eliminates feedback instability. Arbitrary reflection coefficients between almost 0 and about 1.5 have been realized in the frequency range from below 100 Hz to more than 800 Hz. Introduction The absorption of low-frequency sound is difficult with conventional‚ passive methods. Active (electroacoustic) methods are becoming more and more important. The state of entering into engineering practice has been reached especially
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controller) ABSTRACT: A new revolutionary microwave life detection system. Which is used to locate human beings buried (or) trapped under earthquake rubble has been designed. This system operating at certain frequency can remotely detect the breathing and heart beat signals of human beings buried under earthquake rubble. By proper processing of these signals‚ the status of the person under trap can be easily judged. The entire process takes place within a few
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country while most of the power consumption states lie in the western part of the country. There was absence evacuation mechanism of power from one region to another region. As result of it different regions were used to operate at different frequencies. Also frequencies used to widely vary across the day putting network security at stake. It was in October 1991 the Eastern and Northeastern grid was synchronized. It took a long 12 year period‚ March 2003‚ to synchronize the coal rich power producing states
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TABLE OF CONTENTS 1 BACKGROUND INFORMATION. 2 INSTRUMENTATION. 2 RECORDING PROCESSES. 2 REFERNCE TRACKS. 2 SESSION PLAN 1. Drum Track Listings. 3 Microphone Positioning. 3-4 SESSION PLAN 2. Bass Track Listings. 5 Microphone Positioning. SESSION PLAN 3. Guitar Track Listings. (Rhythm) 5 Microphone Positioning. SESSION PLAN 4. Guitar Track Listings. (Lead & Overdub) 6 Microphone Positioning. SESSION PLAN 5. Vocal Track Listings. 7 Microphone Positioning. SESSION
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set of frequencies. In normal basic telephone service‚ a pair of wires is used for communication. But in case of mobile/wireless communications‚ airwaves are used instead of wires. These spectrum/airwaves are licensed by the Government. It is allocated in Mega Hertz (MHz) in telecom licenses. 4.2 MHz is given as start-up spectrum‚ which is topped up by 1.8 MHz to make it 6 MHz (4.2 + 1.8 MHz)‚ and so on. 2) Why spectrum is called a scarce national resource? Worldwide different frequencies are used
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Applied Acoustics 74 (2013) 1499–1510 Contents lists available at SciVerse ScienceDirect Applied Acoustics journal homepage: www.elsevier.com/locate/apacoust Transmission loss analysis of single-inlet/double-outlet (SIDO) and double-inlet/single-outlet (DISO) circular chamber mufflers by using Green’s function method Subhabrata Banerjee‚ Anthony M. Jacobi ⇑ Department of Mechanical Science and Engineering‚ University of Illinois at Urbana-Champaign‚ IL-61801‚ USA a r t i c l e
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receiver. An eavesdropper may have difficulty intercepting a transmission in real time if the pseudorandom sequence is not known. Spread-spectrum transmissions can share a frequency band with many types of conventional transmissions with minimal interference. The spread-spectrum signals add minimal noise to the narrow-frequency communications‚ and vice versa. As a result‚ bandwidth can be used more efficiently. DSSS Resistance to intended or unintended jamming Sharing of a single channel among
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KST Technology Co. Ltd. KST-RX806 Superheterodyne receive technical spec KST-RX806 is wireless data transmit and receive module with VHF/UHF super high frequency. adopting LSI circuit with hi-frequency and low-noise which import from famous company of Europe‚it has strong anti-static protection and high reliability. And it is your first choice among the distant transmit products as wireless remote control (rolling code)‚ eletric gate control system and the like. Characteristic as follows： 1.
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interaction between two or more vibrating elements. It depends on geometry‚ sound frequency‚ and the materials that are used to make it. There are 3 parts to how a guitar works: the strings‚ body‚ and the air inside. The pitch of the string vibrating depends in four things. If the strings are the vibration will be slower. The frequency can be changes by string tension by turning the pegs on the guitar. Also‚ the frequency depends on how long the string that is free to vibrate and finally the mode of
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