Attenuation

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In physics, attenuation (in some contexts also called extinction) is the gradual loss in intensity of any kind of flux through a medium. (Wikipedia.org)






Conferences related to Attenuation

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2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD)

The NSS/MIC offers an outstanding opportunity for scientists and engineers interested in the fields of nuclear science, radiation detection, accelerators, high energy physics and astrophysics, and related software to present their latest developments and ideas. The scientific program provides a comprehensive review of the latest developments in technology and covers a wide range of applications from radiation and accelerator instrumentation, new detector materials, to complex detector systems for physical sciences, and advanced imaging systems for biological and medical research.



Periodicals related to Attenuation

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Antennas and Propagation, IEEE Transactions on

Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.


Medical Imaging, IEEE Transactions on

Imaging methods applied to living organisms with emphasis on innovative approaches that use emerging technologies supported by rigorous physical and mathematical analysis and quantitative evaluation of performance.


Nuclear Science, IEEE Transactions on

All aspects of the theory and applications of nuclear science and engineering, including instrumentation for the detection and measurement of ionizing radiation; particle accelerators and their controls; nuclear medicine and its application; effects of radiation on materials, components, and systems; reactor instrumentation and controls; and measurement of radiation in space.


Oceanic Engineering, IEEE Journal of

Bayes procedures; buried-object detection; dielectric measurements; Doppler measurements; geomagnetism; sea floor; sea ice; sea measurements; sea surface electromagnetic scattering; seismology; sonar; acoustic tomography; underwater acoustics; and underwater radio communication.


Selected Topics in Signal Processing, IEEE Journal of

The Journal of Selected Topics in Signal Processing (J-STSP) solicits special issues on topics that cover the entire scope of the IEEE Signal Processing Society, as outlined in the SPS Constitution, Article II. J-STSP only publishes papers that are submitted in response to a specific Call-for-Papers. These calls are listed on the J-STSP website, and instructions for submitting papers to ...




Xplore Articles related to Attenuation

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Estimating the net harmonic currents produced by selected distributed single-phase loads: computers, televisions, and incandescent light dimmers

W. M. Grady; A. Mansoor; E. F. Fuchs; P. Verde; M. Doyle 2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309), 2002

Individually, single-phase power electronic-based loads pose no problem to power systems. In total, however, they have the potential to raise harmonic voltages and currents to unacceptably high levels. The purpose of this paper is to give guidelines for modeling the net harmonics currents produced by these loads, and to describe the following two key factors used to determine the guidelines: ...


Pulse dispersion in microstrip lines: an extended Taylor series approach

O. R. Baiocchi; M. K. Webb; P. O. Kwok Proceedings of the 32nd Midwest Symposium on Circuits and Systems,, 1989

The simulation of pulse propagation in microstrip transmission lines through a Taylor series expansion is described. The software developed to perform the simulation can model either a single stripline or a coplanar stripline, and provides accurate simulations with graphic output. Systems operating at millimeter-wave frequencies are subject to dispersion and attenuation, which need to be understood by the system designer. ...


Predicting the propagation loss through a tree canopy at millimeter frequencies — Forward scattering approximation — 3-D vector radiative transport theory

Saúl A. Torrico; Roger H. Lang 2011 XXXth URSI General Assembly and Scientific Symposium, 2011

The vector radiative transport theory is used to compute the attenuation produced by a tree canopy containing random located lossy-dielectric leaves and branches at millimeter wave frequencies. Using this approach, the forward scattering approximation is used to simplify the radiative transport equation. The forward scattering approximation is used since at millimeter frequencies, the leaves and branches are large and thick ...


On-chip high performance signaling using passive compensation

Yulei Zhang; Ling Zhang; Akira Tsuchiya; Masanori Hashimoto; Chung-Kuan Cheng 2008 IEEE International Conference on Computer Design, 2008

To address the performance limitation brought by the scaling issues of on-chip global wires, a new configuration for global wiring using on-chip lossy transmission lines(T-lines) is proposed and optimized in this paper. Firstly, we use passive compensation and repeated transceivers composed by sense amplifier and inverter chain to compensate the distortion and attenuation of on-chip T-lines. Secondly, an optimization flow ...


A partition method for UAV's envelope based on fuzzy clustering

Zhao Saifeng; Li Xiujuan; Li Chuntao 2016 IEEE Chinese Guidance, Navigation and Control Conference (CGNCC), 2016

In this paper, a partition method for envelope based on fuzzy clustering is designed to obtain the typical operating points as well as the interpolation mechanism of gain scheduling according to the comparability of the dynamic characteristics and the maneuverability in some partial flight regions. In order to get the most reasonable partition result, the index of clustering evaluation is ...


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Educational Resources on Attenuation

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eLearning

Estimating the net harmonic currents produced by selected distributed single-phase loads: computers, televisions, and incandescent light dimmers

W. M. Grady; A. Mansoor; E. F. Fuchs; P. Verde; M. Doyle 2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309), 2002

Individually, single-phase power electronic-based loads pose no problem to power systems. In total, however, they have the potential to raise harmonic voltages and currents to unacceptably high levels. The purpose of this paper is to give guidelines for modeling the net harmonics currents produced by these loads, and to describe the following two key factors used to determine the guidelines: ...


Pulse dispersion in microstrip lines: an extended Taylor series approach

O. R. Baiocchi; M. K. Webb; P. O. Kwok Proceedings of the 32nd Midwest Symposium on Circuits and Systems,, 1989

The simulation of pulse propagation in microstrip transmission lines through a Taylor series expansion is described. The software developed to perform the simulation can model either a single stripline or a coplanar stripline, and provides accurate simulations with graphic output. Systems operating at millimeter-wave frequencies are subject to dispersion and attenuation, which need to be understood by the system designer. ...


Predicting the propagation loss through a tree canopy at millimeter frequencies — Forward scattering approximation — 3-D vector radiative transport theory

Saúl A. Torrico; Roger H. Lang 2011 XXXth URSI General Assembly and Scientific Symposium, 2011

The vector radiative transport theory is used to compute the attenuation produced by a tree canopy containing random located lossy-dielectric leaves and branches at millimeter wave frequencies. Using this approach, the forward scattering approximation is used to simplify the radiative transport equation. The forward scattering approximation is used since at millimeter frequencies, the leaves and branches are large and thick ...


On-chip high performance signaling using passive compensation

Yulei Zhang; Ling Zhang; Akira Tsuchiya; Masanori Hashimoto; Chung-Kuan Cheng 2008 IEEE International Conference on Computer Design, 2008

To address the performance limitation brought by the scaling issues of on-chip global wires, a new configuration for global wiring using on-chip lossy transmission lines(T-lines) is proposed and optimized in this paper. Firstly, we use passive compensation and repeated transceivers composed by sense amplifier and inverter chain to compensate the distortion and attenuation of on-chip T-lines. Secondly, an optimization flow ...


A partition method for UAV's envelope based on fuzzy clustering

Zhao Saifeng; Li Xiujuan; Li Chuntao 2016 IEEE Chinese Guidance, Navigation and Control Conference (CGNCC), 2016

In this paper, a partition method for envelope based on fuzzy clustering is designed to obtain the typical operating points as well as the interpolation mechanism of gain scheduling according to the comparability of the dynamic characteristics and the maneuverability in some partial flight regions. In order to get the most reasonable partition result, the index of clustering evaluation is ...


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IEEE-USA E-Books

  • Appendix III: Conformal Mapping Techniques

    This appendix contains sections titled: Conformal Mapping Elliptic Sine Function Capacitance between Two Parallel Strips Strip Transmission Line Conductor Loss Conductor Losses for a Microstrip Transmission Line Attenuation for a Coplanar Line

  • Waveguides and Cavities

    This chapter contains sections titled: General Properties of Cylindrical Waveguides Orthogonal Properties of the Modes Power, Energy, and Attenuation The Rectangular Waveguide Circular Cylindrical Waveguides Green's Functions Analogy with Transmission Lines The Tangent Method for the Experimental Determination of the Equivalent- Circuit Parameters Electromagnetic Cavities Cavity with Lossy Walls Variational Formulation for Cavity Eigenvalues Cavity Perturbation Theory This chapter contains sections titled: References and Bibliography Problems

  • Characterization of Propagation Channels

    The reliable knowledge of the propagation channel is the foundation of the design and analysis of any wireless communication system. This chapter provides a unified and conceptually simple explanation of a morass of concepts around wireless channels. In the context of wireless radio channels, wide¿¿?sense stationary uncorrelated scattering (WSSUS) is usually assumed. Wireless channels are the real environments in which the transmitter (Tx) and receiver (Rx) operate. Path loss is the attenuation in the transmitted signal while propagating from the Tx and Rx. Multipath propagation is when the transmitted signal reaches the Rx by two or more paths. The characterization of the multipath fading channel is essential for understanding and modeling it properly. The most important and often¿¿?used approximate descriptions are the first¿¿?order received envelope and phase PDF of multipath fading and some second¿¿?order descriptions of multipath fading, such as the level cross rate (LCR), average fading duration (AFD), and the correlation properties.

  • Robust Adaptive Dynamic Programming

    This chapter contains sections titled: Introduction Optimality Versus Robustness Robust-ADP Design for Disturbance Attenuation Robust-ADP for Partial-State Feedback Control Applications Summary References

  • Optical Communications Essentials

    This chapter contains sections titled: Definitions of Units and Terms Elements of an Optical Link Optical Fibers Optical Fiber Attenuation Fiber Information Capacity Nonlinear Effects in Fibers Optical Fiber Standards Summary Problems Further Reading

  • Author Index

    "FOUNDATIONS FOR MICROWAVE ENGINEERING, Second Edition, covers the major topics of microwave engineering. Its presentation defines the accepted standard for both advanced undergraduate and graduate level courses on microwave engineering. An essential reference book for the practicing microwave engineer, it features: Planar transmission lines, as well as an appendix that describes in detail conformal mapping methods for their analysis and attenuation characteristics Small aperture coupling and its application in practical components such as directional couplers and cavity coupling Printed circuit components with an emphasis on techniques such as even and odd mode analysis and the use of symmetry properties Microwave linear amplifier and oscillator design using solid-state circuits such as varactor devices and transistors FOUNDATIONS FOR MICROWAVE ENGINEERING, Second Edition, has extensive coverage of transmission lines, waveguides, microwave circuit theory, impedance matching and cavity resonators. It devotes an entire chapter to fundamental microwave tubes, in addition to chapters on periodic structures, microwave filters, small signal solid-state microwave amplifier and oscillator design, and negative resistance devices and circuits. Completely updated in 1992, it is being reissued by the IEEE Press in response to requests from our many members, who found it an invaluable textbook and an enduring reference for practicing microwave engineers. About the Author Robert E. Collin is the author or coauthor of more than 150 technical papers and five books on electromagnetic theory and applications. His classic text, Field Theory of Guided Waves, is also a volume in the series. Professor Collin has had a long and distinguished academic career at Case Western Res erve University. In addition to his professional duties, he has served as chairman of the Department of Electrical Engineering and as interim dean of engineering. Professor Collin is a life fellow of the IEEE and a member of the Microwave Theory and Techniques Society and the Antennas and Propagation Society (APS). He is a member of U.S. Commission B of URSI and a member of the Geophysical Society. Other honors include the Diekman Award from Case Western Reserve University for distinguished graduate teaching , the IEEE APS Distinguished Career Award (1992), the IEEE Schelkunoff Prize Paper Award (1992), the IEEE Electromagnetics Award (1998), and an IEEE Third Millennium Medal in 2000. In 1990 Professor Collin was elected to the National Academy of Engineering." Sponsored by: IEEE Antennas and Propagation Society, IEEE Microwave Theory and Techniques Society An Instructor's Manual presenting detailed solutions to all the problems in the book is available upon request from the Wiley Makerting Department.

  • Turbocharging Interpolated FIR Filters

    This chapter contains sections titled: Traditional IFIR Filters Two-Stage-Masking IFIR Filters Recursive IFIR Filters Masking Attenuation Improvement Recursive IFIR Filter Design Example Recursive IFIR Filter Implementation Issues Recursive IFIR Filter Design Recursive IFIR Filters for Decimation An Alternate Masking Subfilter References

  • Transmission Line for Digital TelevisionThis chapter was originally written for Harris Corporation for use in the 1998 DTV Express Handbook, Transmission Line for Digital Television, and is used here with permission.

    In this chapter the essential criteria for transmission line selection for a digital television system are presented. The relationship between transmission line attenuation, dissipation, and power-handling capability is examined. These relationships are applied to the transmission line options available to the broadcaster, including rigid coax, corrugated cables, and waveguides. The purpose of this discussion is to show the effect of line selection on the ability to achieve a specified system output and the effect of selection decisions on other system performance parameters. The importance of maintaining low-voltage standing wave ratio (VSWR) on system performance, the extent of linear distortions for the various line types, frequency and bandwidth limitations, wind loading, and the benefits of pressurization are also reviewed. A transmission line figure of merit that should be useful as an aid to transmission line selection is also described.

  • Weighted Median Filtering StrikingAnalogies to FIR Filters

    Weighted Median (WM) filters have attracted a growing interest in the nonlinear signal processing community. They inherit the robustness and edge preserving capability of the classical median filter and resemble linear FIR filters in certain properties. Furthermore, WM filters belong to the broad class of nonlinear filters called stack filters. This enables the use of the tools developed for the latter class in characterizing and analyzing the behaviour and properties of WM filters, e.g. noise attenuation capability. The fact that WM filters are threshold functions allows the use of neural networks training methods to obtain adaptive WM filters. In this chapter we briefly review WM filters, their deterministic and statistical properties. We point out the striking analogies existing between WM and FIR filters and summarize two important applications of WM filters in signal and image processing.

  • Relations Between Attenuation and Phase in Feedback Amplifier Design

    This chapter contains sections titled: References Introduction Relations Between Attenuation and Phase in Physical Networks Overall Feedback Loop Characteristics Maximum Obtainable Feedback Relative Importance of Tubes and Circuit in Limiting Feedback Amplifiers of Other Types Example



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