Browsing Physics by Title

Browsing Physics by Title

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  • Long range annealing of defects in germanium by low energy plasma ions 
    Archilla, J.F.R.; Coelho, Sergio M.M.; Auret, Francois Danie; Dubinko, V.I.; Hizhnyakov, V. (Elsevier, 2015-03)
    Ions arriving at a semiconductor surface with very low energy (2–8 eV) are interacting with defects deep inside the semiconductor. Several different defects were removed or modified in Sb-doped germanium, of which the ...
  • Looking at the distant universe with the MeerKAT array : discovery of a luminous OH megamaser at z>0.5 
    Glowacki, Marcin; Collier, Jordan D.; Kazemi-Moridani, Amir; Frank, Bradley; Roberts, Hayley; Darling, Jeremy; Klockner, Hans-Rainer; Adams, Nathan; Baker, Andrew J.; Bershady, Matthew; Blecher, Tariq; Blyth, Sarah-Louise; Bowler, Rebecca; Catinella, Barbara; Chemin, Laurent; Crawford, Steven M.; Cress, Catherine; Dave, Romeel; Dave, Romeel; Deane, Roger; De Blok, Erwin; Delhaize, Jacinta; Duncan, Kenneth; Elson, Ed; February, Sean; Gawiser, Eric; Hatfield, Peter; Healy, Julia; Henning, Patricia; Hess, Kelley M.; Heywood, Ian; Holwerda, Benne W.; Hoosain, Munira; Hughes, John P.; Hutchens, Zackary L.; Jarvis, Matt; Kannappan, Sheila; Katz, Neal; Keres, Dusan; Korsaga, Marie; Kraan-Korteweg, Renee C.; Lah, Philip; Lochner, Michelle; Maddox, Natasha; Makhathini, Sphesihle; Meurer, Gerhardt R.; Meyer, Martin; Obreschkow, Danail; Oh, Se-Heon; Oosterloo, Tom; Oppor, Joshua; Pan, Hengxing; Pisano, D.J.; Randriamiarinarivo, Nandrianina; Ravindranath, Swara; Schroder, Anja C.; Skelton, Rosalind; Smirnov, Oleg; Smith, Mathew; Somerville, Rachel S.; Srianand, Raghunathan; Staveley-Smith, Lister; Tanaka, Masayuki; Vaccari, Mattia; Van Driel, Wim; Verheijen, Marc; Walter, Fabian; Wu, John F.; Zwaan, Martin A. (IOP Publishing, 2022-05)
    In the local universe, OH megamasers (OHMs) are detected almost exclusively in infrared-luminous galaxies, with a prevalence that increases with IR luminosity, suggesting that they trace gas-rich galaxy mergers. Given the ...
  • Low temperature thermal properties of HTR nuclear fuel composite graphite 
    Murovhi, Phathutshedzo (University of Pretoria, 2013)
    Graphite and graphite composite materials are of great importance in various applications; however, they have been widely used in nuclear applications. Primarily in nuclear applications such, as a moderator where its primary ...
  • Low temperature thermally reduced graphene oxide directly on Ni-Foam using atmospheric pressure-chemical vapour deposition for high performance supercapacitor application 
    Maphiri, Vusani M.; Bakhoum, Daba T.; Sarr, Samba; Sylla, Ndeye Fatou; Rutavi, Gift; Manyala, Ncholu I. (Elsevier, 2022-08)
    Please read abstract in the article.
  • Low-field microwave absorption in pulse laser deposited FeSi thin film 
    Gavi, H.M. (Happyson Michael); Ngom, Balla D.; Beye, A.C.; Strydom, Andre M.; Srinivasu, V.V.; Chaker, M.; Manyala, Ncholu I. (Elsevier, 2012-03)
    Low field microwave absorption (LFMA) measurements at 9.4 GHz (X-band), were carried out on pulse laser deposited (PLD) polycrystalline B20 cubic structure FeSi thin film grown on Si (111) substrate. The LFMA properties ...
  • Low-field microwave absorption in pulsed lased deposited FeSi thin films 
    Gavi, H.M. (Happyson Michael) (University of Pretoria, 2012-07-16)
    The magnetic behavior of cubic B20 crystal structure FeSi thin film has been previously probed at macroscopic level using a magnetometer. The results revealed ferromagnetic state with significant hysteresis. This is contrary ...
  • Magnetotactic bacteria used to generate electricity based on Faraday's law of electromagnetic induction 
    Smit, B.A.; Van Zyl, Elritha; Joubert, J.J.; Meyer, Walter Ernst; Preveral, S.; Lefevre, C.T.; Venter, Stephanus Nicolaas (Wiley, 2018-05)
    Magnetotactic bacteria (MTB) have the unique ability to produce magnetic particles surrounded by a biomembrane to form the magnetosome organelle. Therefore, MTB have novel physical and magnetic properties and have consequently ...
  • Malathion-filled trilayer polyolefin film for malaria vector control 
    Madzorera, Tatenda; Sibanda, Mthokozisi Mayibongwe; Focke, Walter Wilhelm; Madito, M.J. (Moshawe); Manyala, Ncholu I. (Elsevier, 2019-03)
    The emergence of pyrethroid resistance in mosquitoes is complicating malaria elimination efforts in Africa and alternative insecticides have to be considered for indoor residual spray. Unfortunately, the high volatility ...
  • Marginal deformations and quasi-Hopf algebras 
    Dlamini, Hector; Zoubos, Konstantinos (IOP Publishing, 2019-08)
    We establish the existence of a quasi-Hopf algebraic structure underlying the Leigh–Strassler N=1 superconformal marginal deformations of the N=4 super-Yang–Mills theory. The scalar-sector R-matrix of these theories, which ...
  • Material progress in Africa 
    Chetty, Nithaya; Martin, Richard M., 1942-; Scandolo, Sandro (Nature Publishing Group, 2010-11)
    Exciting opportunities are emerging for science and scientists in Africa. There is a vast pool of latent talent that can be a vital source of advancement and cooperation that has the potential to overcome barriers within ...
  • Measurement of L-shell X-ray production cross sections in 89Y, 158Gd and 209Bi due to 0.3 MeV/u – 1.0 MeV/u 12C ions 
    Ejeh, Ernest Ochai; Hlatshwayo, Thulani Thokozani; Madhuku, M.; Legodi, M.; Msimanga, M. (Elsevier, 2021-11)
    Please read abstract in the article.
  • Mechanical properties of graphene and boronitrene 
    Andrew, Richard Charles; Mapasha, Refilwe Edwin; Ukpong, Aniekan M.; Chetty, Nithaya (American Physical Society, 2012-03)
    Please read abstract in the article.
  • Mechanical properties of hydrogenated bilayer graphene 
    Andrew, Richard Charles; Mapasha, Refilwe Edwin; Chetty, Nithaya (AIP Publishing LLC, 2013)
    Using first principles methods, we study the mechanical properties of monolayer and bilayer graphene with 50% and 100% coverage of hydrogen. We employ the vdW-DF, vdW-DF-C09x and vdW-DF2-C09x van der Waals functionals ...
  • Mechanism of formation water molecules and chemical bonds in Leptothrix materials 
    Mirzayeva, D.M.; Aghayeva, S.A.; Kaplina, S.P.; Slavov, L.; Gustova, M.V.; Tiep, N.V.; Tuan, P.L.; Maletskii, A.V.; Doroshkevich, A.S.; Thabethe, Thabsile Theodora; Hasanov, K.M.; Kostov, L.K.; Mauyey, B. (Jomard Publishing, 2024-02)
    The provided study involves investigating chemical interactions in Leptothrix biomaterial through infrared spectroscopy. The analysis explores variations in chemical relationships based on the nature of chemical bonds ...
  • Mechanochemical approach in the synthesis of activated carbons from waste tyres and its hydrogen storage applications 
    Rambau, Khavharendwe Melba Amukelani; Musyoka, Nicholas M.; Manyala, Ncholu I.; Ren, Jianwei; Langmi, Henrietta Wakuna (Elsevier, 2018)
    The increase in waste tyres has led scientist in the quest for finding various ways for minimizing problems associated with their disposal. The sought solutions are not only meant to be environmentally friendly but also ...
  • The MeerKAT Galaxy Cluster Legacy Survey: I. Survey overview and highlights 
    Knowles, K.; Cotton, W.D.; Rudnick, L.; Camilo, F.; Goedhart, S.; Deane, Roger; Ramatsoku, Mpati; Bietenholz, M.F.; Bruggen, M.; Button, Charissa Bronwyn; Chen, H.; Chibueze, J.O.; Clarke, T.E.; De Gasperin, F.; Ianjamasimanana, R.; Jozsa, Gyula I.G.; Hilton, M.; Kesebonye, K.C.; Kolokythas, K.; Kraan-Korteweg, R.C.; Lawrie, G.; Lochner, M.; Loubser, S.I.; Marchegiani, P.; Mhlahlo, N.; Moodley, K.; Murphy, E.; Namumba, B.; Oozeer, N.; Parekh, V.; Pillay, D.S.; Passmoor, S.S.; Ramaila, A.J.T.; Ranchod, Shilpa; Retana-Montenegro, E.; Sebokolodi, Lerato; Sikhosana, S.P.; Smirnov, Oleg M.; Thorat, Kshitij; Venturi, T.; Abbott, T.D.; Adam, R.M.; Adams, G.; Aldera, M.A.; Bauermeister, E.F.; Bennett, T.G.H.; Bode, W.A.; Botha, D.H.; Botha, A.G.; Brederode, L.R.S.; Buchner, S.; Burger, J.P.; Cheetham, T.; De Villiers, D.I.L.; Dikgale-Mahlakoana, M.A.; Du Toit, L.J.; Esterhuyse, S.W.P.; Fadana, G.; Fanaroff, B.L.; Fataar, S.; Foley, A.R.; Fourie, D.J.; Frank, B.S.; Gamatham, R.R.G.; Gatsi, T.G.; Geyer, M.; Gouws, M.; Gumede, S.C.; Heywood, I.; Hlakola, M.J.; Hokwana, A.; Hoosen, S.W.; Horn, D.M.; Horrell, J.M.G.; Hugo, Benjamin V.; Isaacson, A.R.; Jonas, J.L.; Jordaan, J.D.B.; Joubert, A.F.; Julie, R.P.M.; Kapp, F.B.; Kasper, V.A.; Kenyon, J.S.; Kotze, P.P.A.; Kotze, A.G.; Kriek, N.; Kriel, H.; Krishnan, V.K.; Kusel, T.W.; Legodi, L.S.; Lehmensiek, R.; Liebenberg, D.; Lord, R.T.; Lunsky, B.M.; Madisa, K.; Magnus, L.G.; Main, J.P.L.; Makhaba, A.; Makhathini, Sphesihle; Malan, J.A.; Manley, J.R.; Marais, S.J.; Maree, M.D.J.; Martens, A.; Mauch, T.; McAlpine, K.; Merry, B.C.; Millenaar, R.P.; Mokone, O.J.; Monama, T.E.; Mphego, M.C.; New, W.S.; Ngcebetsha, B.; Ngoasheng, K.J.; Ockards, M.T.; Otto, A.J.; Patel, A.A.; Peens-Hough, A.; Perkins, S.J.; Ramanujam, N.M.; Ramudzuli, Z.R.; Ratcliffe, S.M.; Renil, R.; Robyntjies, A.; Rust, A.N.; Salie, S.; Sambu, N.; Schollar, C.T.G.; Schwardt, L.C.; Schwartz, R.L.; Serylak, M.; Siebrits, R.; Sirothia, S.K.; Slabber, M.; Sofeya, L.; Taljaard, B.; Tasse, C.; Tiplady, A.J.; Toruvanda, O.; Twum, S.N.; Van Balla, T.J.; Van der Byl, A.; Van der Merwe, C.; Van Dyk, C.L.; Van Tonder, V.; Van Wyk, R.; Venter, A.J.; Venter, M.; Welz, M.G.; Williams, L.P.; Xaia, B. (EDP Sciences, 2022-01)
    Please abstract in the article.
  • A MeerKAT morphological and spectral index study of M87 
    Mtshweni, Leon (University of Pretoria, 2022-03-29)
    Messier 87 (M87) is a spectacular radio galaxy located in our cosmic backyard. Its proximity has allowed astronomers to study it in detail across the electromagnetic spectrum. M87 shows a complex structure in the radio ...
  • A MeerKAT view of pre-processing in the Fornax A group 
    Kleiner, D.; Serra, P.; Maccagni, F.M.; Venhola, A.; Morokuma-Matsui, K.; Peletier, R.; Iodice, E.; Raj, M.A.; De Blok, W.J.G.; Comrie, A.; Józsa, G.I.G.; Kamphuis, P.; Loni, A.; Loubser, S.I.; Molnar, D. Cs.; Passmoor, S.S.; Ramatsoku, M.; Sivitilli, A.; Smirnov, O.; Thorat, Kshitij; Vitello, F. (EDP Sciences, 2021-04)
    We present MeerKAT neutral hydrogen (H i) observations of the Fornax A group, which is likely falling into the Fornax cluster for the first time. Our H i image is sensitive to 1.4 × 1019 atoms cm−2 over 44.1 km s−1 , ...
  • MeerKAT's discovery of a radio relic in the bimodal merging cluster A2384 
    Parekh, V.; Thorat, Kshitij; Kale, R; Hugo, Benjamin V.; Oozeer, N.; Makhathini, Sphesihle; Kleiner, Dane; White, S.V.; Jozsa, Gyula I.G.; Smirnov, Oleg M.; Van der Heyden, K.; Perkins, S.; Andati, L.; Ramaila, A.; Ramatsoku, Mpati (Oxford University Press, 2020-11)
    We present the discovery of a single radio relic located at the edge of the galaxy cluster A2384, using the MeerKAT radio telescope. A2384 is a nearby (z = 0.092), low mass, complex bimodal, merging galaxy cluster that ...
  • MeerKAT-16 HI observation of the dIrr galaxy WLM 
    Ianjamasimanana, Roger; Namumba, Brenda; Ramaila, Athanaseus J.T.; Saburova, Anna S.; Jozsa, Gyula I.G.; Myburgh, Talon; Thorat, Kshitij; Carignan, Claude; Maina, Eric; De Blok, W.J.G.; Andati, Lexy A.L.; Hugo, Benjamin V.; Kleiner, Dane; Kamphuis, Peter; Serra, Paolo; Smirnov, Oleg M.; Maccagni, Filippo M.; Makhathini, Sphesihle; Molnar, Daniel Cs.; Perkins, Simon; Ramatsoku, Mpati; White, Sarah V. (Oxford University Press, 2020-10)
    We present observations and models of the kinematics and the distribution of the neutral hydrogen (Hi) in the isolated dwarf irregular galaxy, Wolf-Lundmark-Melotte (WLM). We observed WLM with the Green Bank Telescope ...