Results 11 - 20
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485
Measurement and Modeling of Damping for Time-Domain Stru tral A ousti s Simulations
"... benjamin. otteensta-pariste
h.fr This work deals with the measurement and time-domain modeling of damping in structural acoustics. An experimental technique based on the plate impulse response measurement is presented to estimate the damp-ing factor over a wide frequency band. This technique is succ ..."
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benjamin. otteensta-pariste
h.fr This work deals with the measurement and time-domain modeling of damping in structural acoustics. An experimental technique based on the plate impulse response measurement is presented to estimate the damp-ing factor over a wide frequency band. This technique
The real-valued time-domain TE-modes in lossy waveguides
- Progress In Electromagnetics Research
"... Abstract—The time-domain studies of the modal fields in a lossy waveguide are executed. The waveguide has a perfectly conducting surface. Its cross section domain is bounded by a singly-connected contour of rather arbitrary but enough smooth form. Possible waveguide losses are modeled by a conductiv ..."
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Cited by 1 (0 self)
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Abstract—The time-domain studies of the modal fields in a lossy waveguide are executed. The waveguide has a perfectly conducting surface. Its cross section domain is bounded by a singly-connected contour of rather arbitrary but enough smooth form. Possible waveguide losses are modeled by a
FREQUENCY AND TIME DOMAIN DYNAMIC ANALYSIS CONVERGENCE AND CAUSALITY
"... Abstract: The relation of frequency and time domain (FD and TD) methods of dynamic structural analysis is presented in this paper. In the FD the analysis is performed through a matrix formulation which leads to the Implicit Fourier Transform (ImFT) concept. By this concept the direct and inverse Fo ..."
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Abstract: The relation of frequency and time domain (FD and TD) methods of dynamic structural analysis is presented in this paper. In the FD the analysis is performed through a matrix formulation which leads to the Implicit Fourier Transform (ImFT) concept. By this concept the direct and inverse
Cognitive perspectives of information retrieval interaction: elements of a cognitive IR theory
- Journal of Documentation
, 1996
"... The objective of the paper is to amalgamate theories of text retrieval from various research traditions into a cognitive theory for information retrieval interaction. Set in a cognitive framework, the paper outlines the concept of polyrepresentation applied to both the user's cognitive space an ..."
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Cited by 188 (11 self)
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and the information space of IR systems. The concept seeks to represent the current user's information need, problem state, and domain work task or interest in a structure of causality. Further, it implies that we should apply different methods of representation and a variety of IR techniques of different
Time-Domain Measurement of Negative Group Delay in Negative-Refractive-Index Transmission-line Metamaterials
, 2004
"... We have simulated and constructed a one-dimensional metamaterial composed of a periodically loaded transmission line that exhibits both negative and positive group velocities in a band of effective negative index of refraction. The negative group velocity or, equivalently, the negative group delay, ..."
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Cited by 6 (0 self)
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that this surprising behavior does not violate the requirements of relativistic causality is illustrated with time-domain simulations, which show that discontinuities in the pulse waveforms are traveling at exactly the speed of light in vacuum. The pulse-reshaping mechanism underlying this behavior is also illustrated
Visualizing Causality
- The International Economics Analyst (Goldman Sachs
, 1996
"... this paper discusses how we have given these properties to TNV# and how we have applied the visualizer to two di#erent application domains that are time oriented# local area network tra#c and economic modeling. We conclude with preliminary results of our user testing ..."
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this paper discusses how we have given these properties to TNV# and how we have applied the visualizer to two di#erent application domains that are time oriented# local area network tra#c and economic modeling. We conclude with preliminary results of our user testing
A SYNTHESIS METHOD FOR TIME-DOMAIN PASSIVE FILTERS COMPENSATING FOR WAVEFORM DISTOR- TION
"... Abstract—A novel synthesis method for a class of time-domain passive filters that compensates for waveform distortion caused by frequency dependencies of the transmission properties of signal propagation paths, is formulated. The method is based on the linear response theory and mathematical propert ..."
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Abstract—A novel synthesis method for a class of time-domain passive filters that compensates for waveform distortion caused by frequency dependencies of the transmission properties of signal propagation paths, is formulated. The method is based on the linear response theory and mathematical
Scalable Power Grid Transient Analysis via MOR-Assisted Time-Domain Simulations
"... Abstract—Time domain power grid simulations provide accurate estimations of power supply noises for design verifications. Despite extensive researches, it remains a very challenging problem to perform the simulations efficiently – the large power grid sizes demand tremendous computational resources ..."
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Cited by 1 (0 self)
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and the causality between consecutive time steps hinders parallel implementations. Frequency domain and model order reduction (MOR) techniques promise scalability, though the solution accuracy may become a concern without trading off running time. In this paper, we present a framework for power grid transient
Efficient Evaluation of Near-Field Time-Domain Physical-Optics Integral Using Locally Expanded Green Function Approximation
, 2015
"... Abstract-A time-efficient method is proposed to calculate the near-field time-domain physical-optics (TD-PO) integral to analyze the transient electromagnetic fields scattered from three-dimensional perfectly conducting objects under the illumination of a pulsed plane wave. It is shown that the TD- ..."
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Abstract-A time-efficient method is proposed to calculate the near-field time-domain physical-optics (TD-PO) integral to analyze the transient electromagnetic fields scattered from three-dimensional perfectly conducting objects under the illumination of a pulsed plane wave. It is shown that the TD
Self-determination and persistence in a real-life setting: Toward a motivational model of high school dropout.
- Journal of Personality and Social Psychology,
, 1997
"... The purpose of this study was to propose and test a motivational model of high school dropout. The model posits that teachers, parents, and the school administration's behaviors toward students influence students' perceptions of competence and autonomy. The less autonomy supportive the so ..."
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Cited by 183 (19 self)
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schools. Questionnaire The questionnaire was made up of five parts. In the first part, participants completed three scales that assessed perceptions of different social agents' (parents, teachers, and the school administration) autonomy support in the school domain. 1 Each scale consisted of three
Results 11 - 20
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485