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Parameterized Complexity

by Rod G. Downey, Michael R. Fellows, Rolf Niedermeier, Peter Rossmanith, Rod G. Downey (wellington, New Zeal, Michael R. Fellows (newcastle, Rolf Niedermeier (tubingen, Peter Rossmanith (tu Munchen , 1998
"... the rapidly developing systematic connections between FPT and useful heuristic algorithms | a new and exciting bridge between the theory of computing and computing in practice. The organizers of the seminar strongly believe that knowledge of parameterized complexity techniques and results belongs ..."
Abstract - Cited by 1213 (77 self) - Add to MetaCart
the rapidly developing systematic connections between FPT and useful heuristic algorithms | a new and exciting bridge between the theory of computing and computing in practice. The organizers of the seminar strongly believe that knowledge of parameterized complexity techniques and results belongs

Brain magnetic resonance imaging with contrast dependent on blood oxygenation.

by S Ogawa , T M Lee , A R Kay , D W Tank - Proc. Natl. Acad. Sci. USA , 1990
"... ABSTRACT Paramagnetic deoxyhemoglobin in venous blood is a naturally occurring contrast agent for magnetic resonance imaging (MRI). By accentuating the effects of this agent through the use of gradient-echo techniques in high fields, we demonstrate in vivo images of brain microvasculature with imag ..."
Abstract - Cited by 648 (1 self) - Add to MetaCart
the electroencephalogram (EEG) during MRI experiments, small tubular salt bridges (0.8 mm i.d.) were implanted in small holes through the skull that were located inside the area encircled by the surface coil used for NMR signal detection. Care was taken not to break the dura. Magnetic Resonance Microimaging. Gradient

Excitation Methods For Bridge Structures

by Charles R. Farrar, Thomas A. Duffey, Phillip J. Cornwell, Scott W. Doebling , 1999
"... This paper summarizes the various methods that have been used to excite bridge structures during dynamic testing. The excitation methods fall into the general categories of ambient excitation methods and measuredinput excitation methods. During ambient excitation the input to the bridge is not direc ..."
Abstract - Cited by 10 (0 self) - Add to MetaCart
This paper summarizes the various methods that have been used to excite bridge structures during dynamic testing. The excitation methods fall into the general categories of ambient excitation methods and measuredinput excitation methods. During ambient excitation the input to the bridge

Article Fiber Bragg Grating Temperature Sensors in a 6.5-MW Generator Exciter Bridge and the Development and Simulation of Its Thermal Model

by Kleiton De Morais Sousa, Werner Probst, O Bortolotti, Cicero Martelli, Jean Carlos, Cardozo Silva , 2014
"... sensors ..."
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Abstract not found

Pedestrian excitation of bridges

by D E Newland
"... Abstract: This paper reviews the evidence on dynamic bridge loading caused by moving pedestrians. The phenomenon of ‘synchronization ’ by which people respond naturally to an oscillating bridge when this has a frequency close to their natural walking or running frequency is a feature of this phenome ..."
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amplitude but with a time delay that is arbitrary. When the time delay is a ‘worst case ’ , pedestrians act as a source of negative damping. This theory supports the adoption of a non-dimensional number which measures the susceptibility of a bridge to pedestrian excitation. Although currently

PEDESTRIAN EXCITATION OF BRIDGES- RECENT RESULTS

by David E. Newland
"... The unexpected pedestrian-excited vibration of London’s Millennium Bridge was caused by its low damping and high live load. Several other examples of bridges which vibrate significantly when carrying a crowd of people have since come to light. This paper reviews results for the dynamic loading cause ..."
Abstract - Cited by 4 (0 self) - Add to MetaCart
The unexpected pedestrian-excited vibration of London’s Millennium Bridge was caused by its low damping and high live load. Several other examples of bridges which vibrate significantly when carrying a crowd of people have since come to light. This paper reviews results for the dynamic loading

REGARDING ASYNCHRONOUS EXCITATION OF IRREGULAR BRIDGES

by A. Sextos, A. J. Kappos
"... During strong ground motion, it is expected that bridge structures are subjected to excitation that is non-uniform along their longitudinal axis in terms of amplitude, frequency content and arrival time, a fact primarily attributed to the wave arrival delay, their loss of coherency and the effect of ..."
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During strong ground motion, it is expected that bridge structures are subjected to excitation that is non-uniform along their longitudinal axis in terms of amplitude, frequency content and arrival time, a fact primarily attributed to the wave arrival delay, their loss of coherency and the effect

Self-Excited Aeroelastic Instability of a Bridge Deck

by Assistant Professor, J G Beliveau
"... The self-excited loads due to the response of a suspension bridge are critical to the stability of the motion. Although buffeting loads due to the random components of the wind enter into the mean square of the response, the response is dominated by the inherent instability of the system near the c ..."
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The self-excited loads due to the response of a suspension bridge are critical to the stability of the motion. Although buffeting loads due to the random components of the wind enter into the mean square of the response, the response is dominated by the inherent instability of the system near

Reliability Analysis of Bridge Structures for Earthquake Excitations

by S. Pourzeynali, A. Hosseinnezhad
"... Abstract. In this paper, a numerical approach to the reliability analysis of prestressed reinforced concrete long span bridges is presented. A bridge is modeled by nite element software and the analysis is performed in time domain by considering the bridge material nonlinearity. The considered rando ..."
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Abstract. In this paper, a numerical approach to the reliability analysis of prestressed reinforced concrete long span bridges is presented. A bridge is modeled by nite element software and the analysis is performed in time domain by considering the bridge material nonlinearity. The considered

EXPERIMENTAL MODELLING OF MULTIPLE SUPPORT EXCITATION OF LONG SPAN BRIDGES

by Adam J Crewe, James Ap Norman
"... Eurocode 8 Pt 2 recommends that bridges longer than 400m, or bridges built on significantly varying ground types, should be assessed under the effects of multiple support excitation (MSE). However, previous analytical work has suggested that for shorter bridges MSE can also have an effect on the res ..."
Abstract - Cited by 1 (0 self) - Add to MetaCart
Eurocode 8 Pt 2 recommends that bridges longer than 400m, or bridges built on significantly varying ground types, should be assessed under the effects of multiple support excitation (MSE). However, previous analytical work has suggested that for shorter bridges MSE can also have an effect
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