Now showing items 31-40 of 314
The ultrahigh-peak-power laser: present and future
(Springer-Verlag, 1997-08)
to 10 20 -W/cm 2 range. With some refinements and with superior energy storage materials, even higher peak power in the petawatt range should be possible from tabletop systems. In this paper we show the ultimate achievable ...
Static and dynamic responses of slowly adapting joint receptors
(Elsevier, 1974-04-19)
1. (1) A systems analysis approach was used to study slowly adapting knee joint receptors. Transfer functions were obtained from the receptor response to sinusoidal inputs of knee joint angle over a range of frequencies ...
Amplification of 1 ps pulses at 1.053 [mu]m in a Ti:Al2O3 regenerative amplifier
(Elsevier, 1991-07-01)
We demonstrate the operation of a Ti:Al2O3 regenerative amplifier tunable around 1 [mu]m. Gains up to 108 at 1.053 [mu]m without any spectral narrowing are obtained. This amplifier is designed for use in terawatt picosecond ...
REVIEW ARTICLE: The relationship of the D-X centre in AlxGa1-xAs and other III-V alloys with the conduction band structure
(IOP Publishing Ltd, 1988-12-01)
The electrical properties of the AlxGa1-xAs alloys for x>or=0.24 are dominated by deep donors which appear in undoped and doped crystals. The corresponding defects, which are now more commonly known as D-X centres, also ...
Genetic Algorithms and Machine Learning
(Kluwer Academic Publishers-Plenum Publishers; Kluwer Academic Publishers ; Springer Science+Business Media, 1988-10)
An exactly solvable model of an avalanche-type measuring device
(IOP Publishing Ltd, 2006-11-01)
A quantum many-body model is presented with features similar to those of certain particle detectors. The energy spectrum contains a single, thermodynamically metastable “ready” state and macroscopically-distinct, ...
On the statistics of random pulse processes
(Elsevier, 1971-05)
Statistics are obtained for pulse trains in which the pulse shapes as well as the time base are random. The general expression derived for the mean and spectral density of the pulse train require neither independence of ...
The nature of middle school learners' science content understandings with the use of on-line resources
(Wiley Subscription Services, Inc., A Wiley Company, 2003-03)
Early research on using the World Wide Web indicated that middle school students did not explore much and used Web tools naively. In response to these challenges, an on-line research engine, Artemis, was designed to provide ...
The largest set partitioned by a subfamily of a cover
(Elsevier, 1990-07)
Define [lambda](n) to be the largest integer such that for each set A of size n and cover J of A, there exist B [subset of or equal to] A and G [subset of or equal to] J such that |B| = [lambda](n) and the restriction of ...