Results 131 to 140 of about 74,363 (164)
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Variational functional for transition amplitudes: Improving the time-dependent Hartree-Fock method

Physical Review A, 1986
A variational expression is introduced for transition amplitudes, that is invariant under time reversal and is independent of the phases of trial states. With the use of time-dependent Hartree-Fock (TDHF) wave functions and a linear combination of atomic orbitals, exact numerical results for He+He/sup 2 +/..-->..He/sup +/+He/sup +/ obtained within a ...
David A. Micha, Bela Gazdy
openaire   +3 more sources

Methods for reliable estimation of pulse transit time and blood pressure variations using smartphone sensors

Microprocessors and Microsystems, 2016
Hypertension is known to affect around one third of adults globally and early diagnosis is essential to reduce the effects of this affliction. Todays Blood Pressure (BP) monitoring cuffs are obtrusive and inconvenient for performing regular measurements, and continuous non-invasive blood pressure devices are too complex and expensive for ambulatory use.
Francisco Rincon   +3 more
openaire   +2 more sources

Soil Contamination in Fadama Area in Zaria, Nigeria, Using X-ray Fluorescence Technique

Journal of the Nigerian Association of Mathematical Physics, 2011
In this paper, the contamination level of thirteen elements (Si, Ca, K, V, Ti, Fe, Co. Zn, Rb, Sr, Y, Zr and Nb) from soil samples of the Fadama areas in Zaria, Nigeria were investigated with Energy Dispersive X-ray Fluorescence Technique (EDXRF) method.
R Bello   +3 more
openaire   +53 more sources

A Note on Using Unbounded Functions on Totally Bounded Sets in the Context of the Lebesgue Covering Lemma

Journal of the Nigerian Association of Mathematical Physics, 2012
From a real-valued function f, unbounded on a totally bounded subset of a metric space, we construct a Cauchy sequence in <i>S</i>  on which f is unbounded. Taking f to be a reciprocal Lebesgue number function, for an open cover of S, gives a rapid proof that S is compact when it is complete, without recourse to sequential compactness or ...
FE Ekpenyong   +2 more
openaire   +47 more sources

A time-dependent variation–perturbation method for the calculation of transition properties and its relation to the random phase approximation

The Journal of Chemical Physics, 1975
A time−dependent variation−perturbation (VP) formulation is presented for the simultaneous calculation of the ground state correlation function and the excited state wave function of an atomic or molecular system. The wave functions are chosen for the optimal calculation of transition properties with a relatively small number of molecular integrals ...
openaire   +2 more sources

Magnetic resonance linear accelerator technology and adaptive radiation therapy: An overview for clinicians

Ca-A Cancer Journal for Clinicians, 2022
X Allen Li   +2 more
exaly  

Detection of Super-Earth Planets via the Transit Timing Variation Method

open access: closed, 2008
N. Haghighipour   +2 more
openalex  

Advances in coherent magnonics

Nature Reviews Materials, 2021
Philipp Pirro   +2 more
exaly  

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