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AbstractAbstract
[en] In the paper, we study a super-conducting junctions device subject to an input periodic signal and a constant force. It is shown that, for this device, we can get current reversals for the current of the electron pairs versus the frequency of the periodic signal and negative conductance for the current of the electron pairs as a function of the constant force. (general)
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Available from http://dx.doi.org/10.1088/0253-6102/51/5/20; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Communications in Theoretical Physics; ISSN 0253-6102;
; v. 51(5); p. 853-856

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Nugraha, M; Supriatna, A; Fatimah, S S, E-mail: melindanugraha@student.upi.edu2019
AbstractAbstract
[en] In this research, the comprehension levels and students difficulties on the subject of molecular geometry were determined via respondents ability test. This test consist of five items designed specifically to detect what the students think. One problem has several options, each of which has an indicator of learning difficulty so that when the student selects one of these options, the researcher can immediately detect the difficulties that the student has. The students answer comes with a reason to avoid guess answers. The test was applied on 52 students of grade X. Analysis of test results using descriptive qualitative analysis. According to the findings obtained from the test, the students had numerous difficulties. It was found there are 7 kinds difficulties in geometry molecules material. The top three difficulties experienced by students are (1) 71% of students do not understand the meaning of the symbol of lewis where students describe in the form of covalent bonds; (2) 65% of students do not understand the influence of free electron pairs at geometry molecules; 31% of students do not understand the various types of geometry molecules when given the problem of placing between the name and geometry of the molecules. These results shown that students still do not understand the basic concept of geometry molecules, so that it is required further investigation to find out how to overcome student learning difficulties on the topic of geometry molecules. (paper)
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MSCEIS 2018: International Seminar on Mathematics, Science, and Computer Science Education; Bandung (Indonesia); 27 Oct 2018; Available from http://dx.doi.org/10.1088/1742-6596/1280/3/032012; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Conference
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Journal of Physics. Conference Series (Online); ISSN 1742-6596;
; v. 1280(3); [6 p.]

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Colgan, James
Los Alamos National Laboratory (United States). Funding organisation: US Department of Energy (United States)2009
Los Alamos National Laboratory (United States). Funding organisation: US Department of Energy (United States)2009
AbstractAbstract
[en] Electron-pair excitations in the molecular hydrogen continuum are described by quantizing rotations of the momentum plane of the electron pair about by the pair's relative momentum. A helium-like description of the molecular pi.Joto double ionization is thus extended to higher angular momenta of the electron pair. A simple three-state superposition is found to account surprisingly well for recent observations of noncoplanar electron-pair, molecular-axis angular distributions.
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LA-UR--09-00991; AC52-06NA25396; Available from http://permalink.lanl.gov/object/tr?what=info:lanl-repo/lareport/LA-UR-09-00991
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Journal Article
Journal
Physical Review Letters; ISSN 0031-9007;
; (Issue Jan 2009); vp

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External URLExternal URL
AbstractAbstract
[en] Considering the inclusive process, we study the doubly heavy baryon Ξcc (Ξbb) production through e+ e- annihilation. Both the diquark QQ in color sextet and triplet are discussed. The results show that the contributions from these two color states play equally important roles. At the Z0 pole, a significant enhancement can be found in the doubly heavy baryon production. (authors)
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Source
4 figs., 2 tabs., 22 refs.; http://dx.doi.org/10.1088/0256-307X/31/5/051301
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Journal Article
Journal
Chinese Physics Letters; ISSN 0256-307X;
; v. 31(5); [3 p.]

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AbstractAbstract
[en] Short communication
Original Title
Interferentsionnyj ehffekt v tormoznom izluchenii ehlektronno-pozitronnykh par pri vysokoj ehnergii v veshchestve
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AbstractAbstract
[en] In this paper, having treated the t-J Hamiltonian in the mean-field approximation on basis generated by the Hubbard operators Xσ, the authors try to find the superconductive phase on the antiferromagnetic background. The pairing of the d-wave symmetry appeared to coexist well with the AF long-range order
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Journal Article
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AbstractAbstract
[en] Interference of electromagnetic fields of the electron-positron pair constituents substantially influences interaction of pairs with matter. Suppression of ionization energy losses of electron-positron pairs in matter (the Chudakov effect) was predicted theoretically. Chudakov also suggested that the bremsstrahlung of an electron-positron pair can be suppressed owing to a similar interference mechanism. The aim of this paper is to investigate the influence of interference on the bremsstrahlung of high-energy electron-positron pairs. The author shows that interference leads to an increase in the yield of the bremsstrahlung of a pair rather than to its suppression. The predicted effect is investigated for the simplest case of motion of a pair in an amorphous medium. In this case, the energy ω of emitted photons is assumed to be small as compared to the energy of the pair constituents. This allows the author to consider the problem in the framework of classical electrodynamics
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Translated from Yadernaya Fizika; 57: No. 2, 383-384(1994).
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Journal Article
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Translation
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Field, J.S.; Haines, R.J.; Honrath, U.; Smit, D.N.
Chemistry in South Africa - yesterday, today and tomorrow1987
Chemistry in South Africa - yesterday, today and tomorrow1987
AbstractAbstract
[en] Abstract only
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South African Chemical Inst., Johannesburg (South Africa); 74 p; 1987; p. 25; 75. Jubilee convention of the South African Chemical Institute; Durban (South Africa); 6-10 Jul 1987; Available from the South African Chemical Institute, P.O. Box 61019, Marshalltown, 2107, South Africa
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Miscellaneous
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Conference
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Zueva, T.V.; Ivanov, L.N.
Nuclear spectroscopy an nuclear structure. Summaries of reports of the 41. International conference1991
Nuclear spectroscopy an nuclear structure. Summaries of reports of the 41. International conference1991
AbstractAbstract
[en] Short note. 1 ref
Original Title
Rozhdenie ehlektron-pozitronnykh par pri al'fa-raspade atomnogo yadra
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Source
AN SSSR, Moscow (USSR); AN Belorusskoj SSR, Minsk (Belarus); Belorusskij Gosudarstvennyj Univ., Minsk (Belarus); 534 p; 1991; p. 195; 41. International conference on nuclear spectroscopy and nuclear structure; Minsk (Belarus); 16-19 Apr 1991
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Miscellaneous
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AbstractAbstract
[en] The periodicity effect in the two centre Dirac problem is here analyzed from a physicist's point of view. The associated theoretical scenario is found able to explain all the existing major experimental findings and also to advance some new predictions. (author)
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