Now showing items 31-40 of 105
Gauge invariance in the process
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1998-06)
The process is considered as an example of the problems associated with maintaining gauge invariance in matrix elements involving unstable particles. It is shown how to construct a matrix element that correctly treats width ...
Vibrational relaxation of I2I2 in complexing solvents: The role of solvent–solute attractive forces
(The American Institute of Physics, 1998-12-01)
Femtosecond transient absorption studies of I2–areneI2–arene complexes, with arene=hexamethylbenzenearene=hexamethylbenzene (HMB), mesitylene (MST), or m-xylene (mX), are used to investigate the effect of solvent–solute ...
Absolute instability in a traveling wave tube model
(The American Institute of Physics, 1998-12)
A model is constructed to evaluate absolute instability which may lead to bandedge oscillations in a traveling wave tube. Under the assumptions (a) that all modes have forward group velocities, and (b) that the slow wave ...
Design of a high-sensitivity classifier based on a genetic algorithm: application to computer-aided diagnosis
(IOP Publishing Ltd, 1998-10-01)
A genetic algorithm (GA) based feature selection method was developed for the design of high-sensitivity classifiers, which were tailored to yield high sensitivity with high specificity. The fitness function of the GA was ...
Engineering design aspects of the heatpipe power system
(The American Institute of Physics, 1998-01-15)
The Heatpipe Power System (HPS) is a near-term, low-cost space fission power system designed at Los Alamos National Laboratory that can provide up to 1000 kWt for many space applications. The design of the reactor is simple, ...
The ultrafast photochemical ring-opening reaction of 1,3-cyclohexadiene in cyclohexane
(The American Institute of Physics, 1998-01-08)
The ring-opening reaction of 1,3-cyclohexadiene in cyclohexane solution and the subsequent photoproduct cooling dynamics have been investigated by using two-color transient absorption kinetic measurements and novel ...
Radio-frequency polarimetry
(The American Institute of Physics, 1998-01-20)
A method of fast non-destructive absolute spin monitoring for a bunched beam in an accelerator ring based on use of the RF techniques is considered. The coherent spin of the beam is driven by RF magnets in the spin echo ...
Beam polarimetery at HERA
(The American Institute of Physics, 1998-01-20)
The polarization of the 27.5 GeV electron/positron beam of the HERA epep collider ring is routinely measured with two independent Compton polarimeters. The transverse Compton polarimeter was developed as a tool for the ...
Balance of plant options for the heatpipe bimodal system
(The American Institute of Physics, 1998-01-15)
The Heat pipe Power System (HPS) is a near-term, low-cost space fission power system with the potential for various balance of plant options. The following options have been studied: a low power thermoelectric design (14kWe ...
Electrical conductance between conductors with dissimilar temperature-dependent material properties
(IOP Publishing Ltd, 1998-11-21)
The method of Greenwood and Williamson is extended to give a general solution for the coupled nonlinear problem of steady-state electrical and thermal conduction across an interface between two conductors of dissimilar ...