Now showing items 21-30 of 222
Curvature and flatness in a Brans-Dicke universe
(Elsevier, 1994-06-27)
The evolution of a universe with Brans-Dicke gravity and nonzero curvature is investigated here. We find solutions to the equations of motion during the radiation dominated era. In a Friedman-Robertson-Walker cosmology we ...
A Flexible Spline Model of the Spin Echo with Applications to Estimation of the Spin-Spin Relaxation Time
(Elsevier, 1994-12)
Under weak mathematical assumptions, the distortion due to B0 inhomogeneity is shown to take the form of a characteristic function, which is the Fourier transform of a probability distribution, A model of the spin echo is ...
Bounding the tau neutrino magnetic moment from single photon searches at LEP
(Elsevier, 1994-08-04)
We show that single photon searches at LEP constrain the tau neutrino magnetic moment to be less than . This bound is competitive with low energy ([radical sign]s [reverse similar, equals] 30 GeV) single photon searches.
Implications of for supersymmetry searches and model-building
(Elsevier, 1994-10-27)
Assuming that the actual values of Mt at FNAL and of at LEP are within their current 1[sigma] reported ranges, we present a No-Lose Theorem for superpartner searches at LEP II and an upgraded Tevatron. We impose only two ...
The Einstein solid state spectrometer and monitor proportional counter survey of low mass x‐ray binaries
(The American Institute of Physics, 1994-07-05)
The HEAO‐2 Einstein solid state spectrometer (SSS; 0.5–4.5 keV) and monitor proportional counter (MPC; 1.2–20.0 keV) carried out an extensive survey of 50 low mass x‐ray binaries (LMXB). Simultaneous SSS plus MPC spectra, ...
Photobleaching with a subnanosecond laser flash
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1994-06)
In standard fluorescence recovery after photobleaching (FRAP) applications for measuring lateral diffusion rates and adsorption/desorption kinetics of fluorescent molecules at biological or model membranes, irreversible ...
Evaluation of ( - )[18F]fluoroethoxybenzovesamicol as a new PET tracer of cholinergic neurons of the heart
(Elsevier, 1994-02)
18F-labeled ( - )fluoroethoxybenzovesamicol [( - )FEOBV] is a novel PET tracer which binds to the vesicular acetylcholine transporter of cholinergic neurons. To evaluate the in vivo binding specificity and kinetic properties ...
Normal Modes of Vibration for Non-Linear Continuous Systems
(Elsevier, 1994-01-20)
A definition and a constructive methodology for normal nodes of motion are developed for a class of vibratory systems the dynamics of which are governed by non-linear partial differential equations. The definition for ...
Analytical closed form expressions for the effective band edges in shallow quantum wells
(The American Institute of Physics, 1994-05-16)
Shallow quantum wells are widely used in electronic and optoelectronic heterostructure devices. However, to determine the effective band edges, one needs numerical techniques unless the barrier height is infinite. In this ...
Characterization of [11C]tetrabenazine as an in vivo radioligand for the vesicular monoamine transporter
(Elsevier, 1994-02)
[11C]Tetrabenazine ([11C]TBZ) is a new in vivo radioligand for positron emission tomographic (PET) imaging of vesicular monoamine transporters. The in vivo distribution, metabolism and pharmacological specificity of [11C]TBZ ...