Browsing Physics by Title

Browsing Physics by Title

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  • Rare earth interstitials in Ge : a hybrid density functional theory study 
    Igumbor, Emmanuel; Andrew, Richard Charles; Meyer, Walter Ernst (Springer, 2017-02)
    In this work, the results of density functional theory calculations for rare earth (Ce, Pr, Eu, and Er) interstitials in Ge are presented. We employed the hybrid functional of Heyd, Scuseria, and Ernzerhof (HSE06) for ...
  • Rare earth substitutional impurities in germanium : a hybrid density functional theory study 
    Igumbor, Emmanuel; Omotoso, Ezekiel; Tunhuma, Shandirai Malven; Danga, Helga Tariro; Meyer, Walter Ernst (Elsevier, 2017-10)
    Please read abstract in the article.
  • RBS investigation of the diffusion of implanted xenon in 6H-SIC 
    Thabethe, Thabsile Theodora (University of Pretoria, 2014)
    In modern high temperature nuclear reactors, silicon carbide (SiC) is used as the main diffusion barrier for the fission products in coated fuel spheres called TRISO particles. In the TRISO particle, pyrolytic carbon and ...
  • Real-time feedback-driven single-particle tracking : a survey and perspective 
    Van Heerden, Bertus; Vickers, Nicholas A.; Kruger, T.P.J. (Tjaart); Andersson, Sean B. (Wiley, 2022-07)
    Real-time feedback-driven single-particle tracking (RT-FD-SPT) is a class of techniques in the field of single-particle tracking that uses feedback control to keep a particle of interest in a detection volume. These methods ...
  • Recent development in the formation and surface modification of cellulose-bead nanocomposites as adsorbents for water purification : a comprehensive review 
    Ivbanikaro, Anna E.; Okonkwo, Jonathan O.; Sadiku, Emmanuel R.; Maepa, Charity E. (De Gruyter, 2023-08)
    Water pollution is an issue of global concern that demands effective and sustainable solutions through water purification. Adsorption is a popular method for water treatment because it is inexpensive and has a high performance ...
  • Recovering the two-body potential from a given three-body wave function 
    Belyaev, Vladimir Borisovich; Rakityansky, Sergei Anatoljevich; Gopane, Ishmael Mmusi (Springer, 2023)
    A simple way of deducing the two-body potential from a given two- or three-body wave function is suggested. This method makes it possible to numerically obtain an unknown potential acting between the particles A and B when ...
  • Recycling of biomass wastes from amarula husk by a modified facile economical water salt method for high energy density ultracapacitor application 
    Tarimo, Delvina Japhet; Mirghni, Abdulmajid Abdallah; Oyedotun, Kabir Oyeniran; Rutavi, Gift; Kitenge, Vianney Ngoyi; Manyala, Ncholu I. (Elsevier, 2022-09)
    Please read abstract in the article.
  • Reduction of recombination rates due to volume increasing, annealing, and tetraethoxysilicate treatment in hematite thin films 
    Congolo, S.; Madito, M.J.; Paradzah, Alexander Tapera; Harrison, Arthur Justin; Elnour, Huzifa Mohammed Ahamed Mohammed; Kruger, T.P.J. (Tjaart); Diale, M. (Mmantsae Moche) (Springer, 2020-06)
    We report on the properties of hematite thin films prepared by spray pyrolysis on fluorine-doped tin oxide (FTO)-coated glass substrates and investigated the effect of the spray volume, tetraethoxysilicate treatment of the ...
  • Relative discrete spectrum of W*-dynamical system 
    Duvenhage, Rocco de Villiers; King, Malcolm (Springer, 2021-01)
    A definition of relative discrete spectrum of noncommutative W*-dynamical systems is given in terms of the basic construction of von Neumann algebras, motivated from three perspectives: First, as a complementary concept ...
  • Relative ergodic properties of C*-dynamical systems 
    Duvenhage, Rocco de Villiers; Mukhamedov, Farrukh (World Scientific Publishing, 2014-03)
    We study various ergodic properties of C*-dynamical systems inspired by unique ergodicity. In particular we work in a framework allowing for ergodic properties defined relative to various subspaces, and in terms of ...
  • Relative weak mixing of W∗-dynamical systems via joinings 
    Duvenhage, Rocco de Villiers; King, Malcolm (Polish Academy of Sciences, Institute of Mathematics, 2019)
    A characterization of relative weak mixing in W∗-dynamical systems in terms of a relatively independent joining is proven.
  • Relatively independent joinings and subsystems of W*-dynamical systems 
    Duvenhage, Rocco de Villiers (Polskiej Akademii Nauk, Instytut Matematyczny, 2012)
    Relatively independent joinings ofW*-dynamical systems are constructed. This is intimately related to subsystems of W*-dynamical systems, and therefore we also study general properties of subsystems, in particular fixed ...
  • Renewable pine cone biomass derived carbon materials for supercapacitor application 
    Bello, Abdulhakeem; Manyala, Ncholu I.; Barzegar, Farshad; Khaleed, Abubakar A.; Momodu, Damilola Y.; Dangbegnon, Julien K. (Royal Society of Chemistry, 2016-07)
    The environmental degradation and hazard to human life caused by the depletion of fossils fuels and the urgent need for sustainable energy sources to meet the rising demand in energy has led to the exploration of novel ...
  • Resolving the inner parsec of the blazar J1924–2914 with the Event Horizon Telescope 
    Issaoun, Sara; Wielgus, Maciek; Jorstad, Svetlana; Krichbaum, Thomas P.; Blackburn, Lindy; Janssen, Michael; Chan, Chi-kwan; Pesce, Dominic W.; Gomez, Jose L.; Akiyama, K.; Moscibrodzka, Monika; Marti-Vidal, Ivan; Chael, Andrew; Lico, Rocco; Liu, Jun; Ramakrishnan, Venkatessh; Lisakov, Mikhail; Fuentes, Antonio; Zhao, Guang-Yao; Moriyama, Kotaro; Broderick, Avery E.; Tiede, Paul; MacDonald, Nicholas R.; Mizuno, Yosuke; Traianou, Efthalia; Loinard, Laurent; Davelaar, Jordy; Gurwell, Mark; Lu, Ru-Sen; Alberdi, Antxon; Alef, Walter; Algaba, Juan Carlos; Anantua, Richard; Asada, Keiichi; Azulay, Rebecca; Bach, Uwe; Baczko, Anne-Kathrin; Ball, David; Balokovic, Mislav; Barrett, John; Baubock, Michi; Benson, Bradford A.; Bintley, Dan; Blundell, Raymond; Boland, Wilfred; Bouman, Katherine L.; Bower, Geoffrey C.; Boyce, Hope; Bremer, Michael; Brinkerink, Christiaan D.; Brissenden, Roger; Britzen, Silke; Broguiere, Dominique; Bronzwaer, Thomas; Bustamante, Sandra; Byun, Do-Young; Carlstrom, John E.; Ceccobello, Chiara; Chatterjee, Koushik; Chatterjee, Shami; Chen, Ming-Tang; Chen, Yongjun; Cho; Christian, Pierre; Conroy, Nicholas S.; Conway, John E.; Cordes, James M.; Crawford, Thomas M.; Crew, Geoffrey B.; Cruz-Osorio, Alejandro; Cui, Yuzhu; De Laurentis, Mariafelicia; Dempsey, Jessica; Desvignes, Gregory; Dexter, Jason; Doeleman, Sheperd S.; Dhruv, Vedant; Quijano, Sergio Abraham Dzib; Eatough, Ralph P.; Emami, Razieh; Falcke, Heino; Farah, Joseph; Fish, Vincent L.; Fomalont, Ed; Ford, H. Alyson; Fraga-Encinas, Raquel; Freeman, William T.; Friberg, Per; Fromm, Christian M.; Galison, Peter; Gammie, Charles F.; Garcia, Roberto; Gentaz, Olivier; Georgiev, B.; Goddi, C.; Gold, Roman; Gomez-Ruiz, Arturo I.; Gu, Minfeng; Hada, Kazuhiro; Haggard, Daryl; Hecht, Michael H.; Hesper, Ronald; Ho, Luis C.; Ho, Paul; Honma, Mareki; Huang, Chih-Wei L.; Huang, Lei; Hughes, David H. (IOP Publishing, 2022-08-01)
    The blazar J1924–2914 is a primary Event Horizon Telescope (EHT) calibrator for the Galactic center’s black hole Sagittarius A*. Here we present the first total and linearly polarized intensity images of this source ...
  • Resonant states 3+ and 2− of the Boron isotope 8B 
    Tshipi, T.J.; Rakityansky, Sergei Anatoljevich; Ershov, S.N. (World Scientific Publishing, 2022-08)
    Please read abstract in the article.
  • Response of Ni/4H-SiC Schottky barrier diodes to alpha-particle irradiation at different fluences 
    Omotoso, Ezekiel; Meyer, Walter Ernst; Auret, Francois Danie; Diale, M. (Mmantsae Moche); Ngoepe, Phuti Ngako Mahloka (Elsevier, 2016-01)
    Irradiation experiments have been carried out on 1.9 × 1016 cm–3 nitrogen-doped 4H-SiC at room temperature using 5.4 MeV alpha-particle irradiation over a fluence ranges from 2.6 × 1010 to 9.2 × 1011 cm–2. Current-voltage ...
  • Revisiting a flux recovery systematic error arising from common deconvolution methods used in aperture-synthesis imaging 
    Radcliffe, Jack Frederick; Beswick, R.J.; Thomson, A.P.; Njeri, A.; Muxlow, T.W.B. (Oxford University Press, 2024-01)
    The point-spread function (PSF) is a fundamental property of any astronomical instrument. In interferometers, differing array configurations combined with their uv coverage, and various weighting schemes can produce an ...
  • Revisiting entanglement within the Bohmian approach to quantum mechanics 
    Zander, Claudia; Plastino, Angel Ricardo (MDPI Publishing, 2018-06-18)
    We revisit the concept of entanglement within the Bohmian approach to quantum mechanics. Inspired by Bohmian dynamics, we introduce two partial measures for the amount of entanglement corresponding to a pure state of a ...
  • The role of energy losses in photosynthetic light harvesting 
    Kruger, T.P.J. (Tjaart); Van Grondelle, R. (IOP Publishing, 2017-07)
    Photosynthesis operates at the bottom of the food chain to convert the energy of light into carbohydrates at a remarkable global rate of about 130 TW. Nonetheless, the overall photosynthetic process has a conversion ...
  • The role of exciton delocalization in the major photosynthetic light-harvesting antenna of plants 
    Ramanan, Charusheela; Gruber, J. Michael; Maly, Pavel; Negretti, Marco; Novoderezhkin, Vladimir; Kruger, T.P.J. (Tjaart); Man cal, Tomas; Croce, Roberta; Van Grondelle, Rienk (Biophysical Society, 2015-03)
    In the major peripheral plant light-harvesting complex LHCII, excitation energy is transferred between chlorophylls along an energetic cascade before it is transmitted further into the photosynthetic assembly to be converted ...