Now showing items 81-90 of 102
Quantitative characterization of hemodynamic properties and vasculature dysfunction of high-grade gliomas
(John Wiley & Sons, Ltd., 2007-10)
Aberrations in tumor and peritumoral vasculature may not be distinguishable by cerebral blood flow (CBF) or cerebral blood volume (CBV) alone. The relationships between CBF and CBV were examined to estimate vasculature-specific ...
Transient Decay of Longitudinal Magnetization in Heterogeneous Spin Systems under Selective Saturation. IV. Reformulation of the Spin-Bath-Model Equations by the Redfield-Provotorov Theory
(Elsevier, 1994-01)
Alternative formulations to the conventional Bloch equations for the RF saturation of the solid component in heterogeneous spin systems according to a spin-bath model are derived using the concept of spin temperature as ...
Optoelectronic properties of (001) and (111) lattice-matched and strained quantum wire lasers--comparison with quantum well lasers
(Elsevier, 1994)
We investigate the optoelectronic properties of GaAs wires along the [001] and [111] directions for a range of cross sections and compare these with the corresponding parameters for optimized quantum wells. The relative ...
57Fe hyperfine interaction parameters and selected magnetic properties of high purity MFe12O19 (M=Sr, Ba)
(Elsevier, 1987-05)
Much of the confusion regarding the 57Fe Mossbauer spectroscopic hyperfine parameters of SrFe12O19 and BaFe12O19 at 300 K has been removed by means of an interlaboratory investigation of well-characterized samples prepared ...
Removal of dispersive baseline distortions caused by strong water signals
(Elsevier, 1991-02-01)
Morphological transformations based on optical symbolic substitution and polarization-encoded optical shadow-casting systems
(Elsevier, 1991-05-01)
By conbining two powerful optical computing techniques, namely, optical symbolic substitution (OSS) and polarization-encoded optical shadow-casting (POSC), morphological or shape transformation operations are demonstrated. ...
The surface properties of barium titanate
(Elsevier, 1968-08)
Semiconductor thin films are used to study the ferroelectric surface. The observed n-type germanium, deposited on BaTiO3 at elevated temperatures, is explained on the basis of the ferroelectric space-charge layer. The ...
Logical equivalence of optical symbolic substitution and shadow-casting schemes
(Elsevier, 1992-07-01)
The logical equivalence between two powerful optical computing techniques, namely, optical symbolic substitution and optical shadow-casting is investigated. A common basis for both schemes is developed and their roots are ...
Holography with non-coherent light
(Elsevier, 1973-12)
A new technique of making holograms with non-coherent light has been demonstrated using continuous-spectrum white light zirconium arc source. Such a technique, employing diffraction gratings as beam splitters and beam ...
Ultrahigh-bandwidth vector network analyzer based on external electro-optic sampling
(Elsevier, 1992-03)
We report the development of an ultrahigh-bandwidth vector network analyzer useful for small-signal characterization of high-speed semiconductor devices. It employs 100-fs optical pulses for making terahertz-bandwidth ...