Now showing items 51-60 of 102
Modulation of twin-emitter semiconductor lasers beyond the frequency of relaxation oscillations
(Elsevier, 1991-04-15)
Self-modulation above the relaxation oscillation frequency has been previously observed in a phased-array semiconductor lasers. Rate equations for a twin-emitter phased-array semiconductor laser are used to show that active ...
Determining the phase of line objects by measuring their intensity in dark field and bright field illumination
(Elsevier, 1973-06)
The in situ phase of a transparent line object can be calculated from measurements of its bright field and dark field intensity. If the sampling aperture is a slit, the background can be subtracted out for increased accuracy. ...
Power limitations in BARITT devices
(Elsevier, 1976-09)
The results of a large-signal numerical simulation of the BARITT device using a single-carrier model are given to illustrate the basic transport mechanisms involved in the device. The results of existing first-order small- ...
An alexandrite pumped Nd:glass regenerative amplifier for chirped pulse amplification
(Elsevier, 1992-08-15)
An alexandrite pumped, Nd:glass regenerative amplifier is demonstrated. This amplifier has been used with chirped pulse amplification to produce millijoule, picosecond pulses. Using this technique the overall gain bandwidth ...
Quantitative numerical analysis of g strain in the EPR of distributed systems and its importance for multicenter metalloproteins
(Elsevier, 1985-02-01)
A method for simulation of inhomogeneously broadened EPR of metallo-proteins based on recent theoretical advances is surveyed critically in terms of efficiency and accuracy. From the quality of the experimental spectrum, ...
Diffusion imaging for evaluation of tumor therapies in preclinical animal models
(Springer-Verlag; ESMRMB, 2004-12)
The increasing development of novel targeted therapies for treating solid tumors has necessitated the development of technology to determine their efficacy in preclinical animal models. One such technology that can ...
A statistical theory for powder EPR in distributed systems
(Elsevier, 1985-02-01)
A statistical interpretation is presented for "g strain," the dominant broadening in the EPR spectra of metallo-proteins. The direct cause of g strain is described by a three-dimensional tensor p, whose principal elements ...
An analysis of g strain in the EPR of two [2Fe---2S] ferredoxins. Evidence for a protein rigidity model
(Elsevier, 1986-10-01)
Replacing current notions of a paramagnetic center in a metalloprotein as a single entity in vivo with the more realistic concept of an ensemble of spin systems, each uniquely disturbed by its own surrounding protein, leads ...
A method of image plane multiplex holography
(Elsevier, 1983-11-15)
A method for making image plane multiplex holograms is described. These exhibit the full 3-D imagery of conventional multiplex holograms, but can be made without the use of coherent light. A similarity to lenticular ...