Results 271 to 280 of about 1,057,490 (313)

Transmission of Electrons through Potential Barriers

Physical Review, 1931
It is shown that the application of the Wentzel-Kramers-Brillouin approximate solution of the wave equation to problems of the transmission of electrons through potential barriers leads to simple derivations of formulas for the transmission coefficient. This method may be applied systematically to potential barriers of arbitrary form.
Frank, N. H., Young, L. A.
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Photochemical Isomerization in the Absence of a Potential Barrier

Eighth International Conference on Ultrafast Phenomena, 1991
Different time-resolved spectroscopic techniques, both in the picosecond and sub-picosecond regimes have been used to investigate the photophysics of the isomerization reaction of the molecule 1,1‘-diethyl-4,4‘-cyanine (fig.1a). The molecule is characterized by a very short excited state lifetime with a linear viscosity dependence over a wide viscosity
Ulf Åberg, Villy Sundström
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Cloud Computing in China: Barriers and Potential

IT Professional, 2013
Many cities in China are seeking to establish cloud computing facilities for public and business services. However, despite large investments in the cloud, there are still several barriers to strategic cloud deployment in China.
Wai-Ming To, Linda S. L. Lai, Andy W. L. Chung   +2 more
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Interface potential changes and Schottky barriers

Physical Review B, 1985
By investigating local potential changes at the Si(111)/Al interface, we find restrictions on the use of “canonical” Schottky-barrier heights. It is demonstrated that the “metallic” behavior of the metal-induced gap states is insufficient to completely screen out stronglocal interface potential effects on Schottky-barrier heights.
, Zhang, , Cohen, , Louie
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Potential Barriers in Semiconductors

Physics Bulletin, 1965
B. R. Gossick New York: Academic Press Inc. 1964. Pp. 153. Price 20s. (Paperback) The metal-semiconductor contact and the p-n junction form the bricks of which the technology of solid state rectification is constructed. Thus the analysis of the potential distributions and the carrier transport associated with these junctions is of fundamental ...
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Potential barriers to effective MUST implementation

British Journal of Community Nursing, 2014
The Malnutrition Universal Screening Tool (MUST) is frequently cited as a simple screening tool for malnutrition. However, anecdotally, it seems that not all staff find it simple to use. If staff do not find MUST simple to complete, then screening is less likely to be completed accurately.
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Protein separation by potential barrier chromatography

Biotechnology and Bioengineering, 1986
AbstractPotential barrier chromatography (PBC) is a liquid chromatographic method in which the adsorption and desorption of proteins are controlled by modifications of repulsive double‐layer and attractive van der Waals interactions between the proteins and the adsorbent through changes in mobile phase composition.
E, Ruckenstein, V, Lesins
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Carpooling potential and barriers

2020
A carpooling application by Blox Car was piloted in the City of Espoo from Sept 2018 to Jan 2019. This paper presents pilot and survey results for the pilot andexperiences of the process. The results find major events and regularly scheduled trips to be the most potential use cases. The biggest barriers for participation include lack of supply (drivers)
Kostiainen, Juho, Lusikka, Toni
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Tunnelling through a Combined Magnetic–Potential Barrier

physica status solidi (b), 2001
Tunnelling of electrons through a potential barrier containing a magnetic barrier is studied. The transmission and conductance through such a combined magnetic and potential barrier is a strong function of the relative position of the magnetic barrier inside the potential barrier.
Papp, G., Peeters, F.M.
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Nuclear Potential Barriers: Experiment and Theory

Physical Review, 1935
The heights of nuclear potential barriers are derived from experimental data, corrected for nuclear motion and penetration through the barrier. Barriers differ markedly for different incident particles. It is shown that the heights of barriers to alpha-particles increase with atomic number and that the nuclear radius at the top is proportional to the ...
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