Browsing Physics by Title

Browsing Physics by Title

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  • Gas sensing properties of nanostructured vanadium oxide semiconductors by chemoresistive and optical methods 
    Akande, Amos Adeleke (University of Pretoria, 2017)
    The aims of this research thesis are to synthesise VO2, V2O5 and V6O13 nanostructures and apply the materials on sensor electrodes for gas and humidity sensing. These materials were synthesised and optimised using chemical ...
  • GASP XXVI. HI gas in jellyfish galaxies : the case of JO201 and JO206 
    Ramatsoku, Mpati; Serra, Paolo; Poggianti, B.M.; Moretti, A.; Gullieuszik, M.; Bettoni, D.; Deb, T.; Franchetto, A.; Van Gorkom, J.H.; Jaffe, Y.; Tonnesen, S.; Verheijen, M.A.; Vulcani, B.; Andati, L.A.L.; De Blok, E.; Jozsa, Gyula I.G.; Kamphuis, Peter.; Kleiner, Dane; Maccagni, Filippo M.; Makhathini, Sphesihle; Molnar, Daniel Cs.; Ramaila, A.J.T.; Smirnov, Oleg M.; Thorat, Kshitij (EDP Sciences, 2020-08)
    Please read abstract in the article.
  • Generalized Geometry and Hopf Twists 
    Dlamini, Siphesihle Hector (University of Pretoria, 2016)
    The Leigh-Strassler theories are marginal deformations of the N = 4 SYM theory preserving N = 1 Supersymmetry. As such they admit a Hopf algebra structure which is a quantum group deformation of the SU(3) structure of the ...
  • Generalized statistics and the formation of a quark-gluon plasma 
    Teweldeberhan, Amanuel Matewos (University of Pretoria, 2007-05-17)
    Please read the abstract in the section 00front of this document
  • GGA + U studies of the early actinide mononitrides and dinitrides 
    Obodo, K.O. (Kingsley Onyebuchi); Chetty, Nithaya (Elsevier, 2013)
    We present a detailed comparative study of the electronic and mechanical properties of the early actinide mononitrides and dinitrides within the framework of the Perdew–Burke–Ernzerhof generalized gradient approximation ...
  • Goal-oriented stacking in radio interferometric maps 
    Smulders, Jacques Christian (University of Pretoria, 2022)
    Many astrophysical questions are addressed by large area surveys, where sensitivity limits the distance and luminosity of directly detected objects. One way to gain further effective sensitivity is to forego knowledge of ...
  • Graphene foam–based electrochemical capacitors 
    Oyedotun, Kabir Oyeniran; Manyala, Ncholu I. (Elsevier, 2020-06)
    Electrochemical capacitors (ECs) are a promising technology for energy storage, and future development of sustainable electrode materials is critical to developing these devices. The recent progress and earnest motivation ...
  • Gravitational test beyond the first post-newtonian order with the shadow of the M87 black hole 
    Psaltis, Dimitrios; Medeiros, Lia; Christian, Pierre; Ozel, Feryal; Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter; Asada, Keiichi; Azulay, Rebecca; Ball, David; Balokovic, Mislav; Barrett, John; Bintley, Dan; Blackburn, Lindy; Boland, Wilfred; Bower, Geoffrey C.; Bremer, Michael; Brinkerink, Christiaan D.; Brissenden, Roger; Britzen, Silke; Broguiere, Dominique; Bronzwaer, Thomas; Byun, Do-Young; Carlstrom, John E.; Chael, Andrew; Chan, Chi-kwan; Chatterjee, Shami; Chatterjee, Koushik; Chen, Ming-Tang; Chen, Yongjun; Cho, Ilje; Conway, John E.; Cordes, James M.; Crew, Geoffrey B.; Cui, Yuzhu; Davelaar, Jordy; De Laurentis, Mariafelicia; Deane, Roger; Dempsey, Jessica; Desvignes, Gregory; Dexter, Jason; Eatough, Ralph P.; Falcke, Heino; Fish, Vincent L.; Fomalont, Ed; Fraga-Encinas, Raquel; Friberg, Per; Fromm, Christian M.; Gammie, Charles F.; García, Roberto; Gentaz, Olivier; Goddi, Ciriaco; Gomez, Jose L.; Gu, Minfeng; Gurwell, Mark; Hada, Kazuhiro; Hesper, Ronald; Ho, Luis C.; Ho, Paul; Honma, Mareki; Huang, Chih-Wei L.; Huang, Lei; Hughes, David H.; Inoue, Makoto; Issaoun, Sara; James, David J.; Jannuzi, Buell T.; Janssen, Michael; Jiang, Wu; Jimenez-Rosales, Alejandra; Johnson, Michael D.; Jorstad, Svetlana; Jung, Taehyun; Karami, Mansour; Karuppusamy, Ramesh; Kawashima, Tomohisa; Keating, Garrett K.; Kettenis, Mark; Kim, Jae-Young; Kim, Junhan; Kim, Jongsoo; Kino, Motoki; Koay, Jun Yi; Koch, Patrick M.; Koyama, Shoko; Kramer, Michael; Kramer, Carsten; Krichbaum, Thomas P.; Kuo, Cheng-Yu; Lauer, Tod R.; Lee, Sang-Sung; Li, Yan-Rong; Li, Zhiyuan; Lindqvist, Michael; Lico, Rocco; Liu, Jun; Liu, Kuo; Liuzzo, Elisabetta; Lo, Wen-Ping; Lobanov, Andrei P.; Lonsdale, Colin; Lu, Ru-Sen; Mao, Jirong; Markoff, Sera; Marrone, Daniel P.; Marscher, Alan P.; Marti-Vidal, Ivan; Matsushita, Satoki; Mizuno, Yosuke; Mizuno, Izumi; Moran, James M.; Moriyama, Kotaro; Moscibrodzka, Monika; Muller, Cornelia; Musoke, Gibwa; Mus Mejias, Alejandro; Nagai, Hiroshi; Nagar, Neil M.; Narayan, Ramesh; Narayanan, Gopal; Natarajan, Iniyan; Neri, Roberto; Noutsos, Aristeidis; Okino, Hiroki; Olivares, Hector; Oyama, Tomoaki; Palumbo, Daniel C.M.; Park, Jongho; Patel, Nimesh; Pen, Ue-Li; Pietu, Vincent; Plambeck, Richard; PopStefanija, Aleksandar; Prather, Ben; Preciado-Lopez, Jorge A.; Ramakrishnan, Venkatessh; Rao, Ramprasad; Rawlings, Mark G.; Raymond, Alexander W.; Ripperda, Bart; Roelofs, Freek; Rogers, Alan; Ros, Eduardo; Rose, Mel; Roshanineshat, Arash; Rottmann, Helge; Roy, Alan L.; Ruszczyk, Chet; Ryan, Benjamin R.; Rygl, Kazi L.J.; Sanchez, Salvador; Sanchez-Arguelles, David; Sasada, Mahito; Savolainen, Tuomas; Schloerb, F. Peter; Schuster, Karl-Friedrich; Shao, Lijing; Shen, Zhiqiang; Small, Des; Sohn, Bong Won; SooHoo, Jason; Tazaki, Fumie; Tilanus, Remo P.J.; Titus, Michael; Torne, Pablo; Trent, Tyler; Traianou, Efthalia; Trippe, Sascha; Van Bemmel, Ilse; Van Langevelde, Huib Jan; Van Rossum, Daniel R.; Wagner, Jan; Wardle, John; Ward-Thompson, Derek; Weintroub, Jonathan; Wex, Norbert; Wharton, Robert; Wielgus, Maciek; Wong, George N.; Wu, Qingwen; Yoon, Doosoo; Young, Andre; Younsi, Ziri; Yuan, Feng; Yuan, Ye-Fei; Zhao, Shan-Shan (American Physical Society, 2020-10-01)
    The 2017 Event Horizon Telescope (EHT) observations of the central source in M87 have led to the first measurement of the size of a black-hole shadow. This observation offers a new and clean gravitational test of the ...
  • Green and scalable synthesis of 3D porous carbons microstructures as electrode materials for high rate capability supercapacitors 
    Bello, Abdulhakeem; Dangbegnon, Julien K.; Momodu, Damilola Y.; Ochai-Ejeh, F.O. (Faith); Oyedotun, Kabir Oyeniran; Manyala, Ncholu I. (Royal Society of Chemistry, 2018)
    Porous carbon nanostructures have long been studied because of their importance in many natural phenomena and their use in numerous applications. A more recent development is the ability to produce porous carbon materials ...
  • Gross features of finite nuclei at finite temperatures 
    Coelho, Sergio M.M.; Zander, Claudia; Miller, H.G. (Springer, 2010-03)
    A simple expression is obtained for the low-temperature behaviour of the energy and entropy of finite nuclei for 20 ≤ A ≤ 250. The dependence on A of these quantities is for the most part due to the presence of the asymmetry ...
  • Ground motion variability and its effect on the probabilistic seismic hazard analysis 
    Pavlenko, Vasily (University of Pretoria, 2016)
    The majority of injuries and casualties during earthquakes occur as a result of partial or complete collapse of buildings. The assessment of possible seismic ground motions for the purposes of earthquake-resistant design ...
  • Growth and characterization of highly stable and layered 2D/3D perovskites for solar cells 
    Thubane, Sandile Job (University of Pretoria, 2022)
    Perovskites of cesium lead halide (CsPbX3, X = Cl, Br, I) have received a lot of attention due to their relative stability in comparison to their organic-inorganic counterparts. This study synthesized a thin film of ...
  • Growth of graphene underlayers by chemical vapor deposition 
    Fabiane, Mopeli; Khamlich, Saleh; Bello, Abdulhakeem; Dangbegnon, Julien K.; Momodu, Damilola Y.; Johnson, Alan T. Charlie; Manyala, Ncholu I. (American Institute of Physics, 2013-11)
    We present a simple and very convincing approach to visualizing that subsequent layers of graphene grow between the existing monolayer graphene and the copper catalyst in chemical vapor deposition (CVD). Graphene samples ...
  • H I in and behind the Hubble Frontier Field clusters : a deep MeerKAT pilot search out to z similar to 0.5 
    Ranchod, Shilpa; Deane, Roger; Obreschkow, Danail; Blecher, Tariq; Heywood, Ian (Oxford University Press, 2022-02)
    Please read abstract in the article.
  • Half-metallic ferromagnetism in substitutionally doped boronitrene 
    Ukpong, Aniekan M.; Chetty, Nithaya (American Physical Society, 2012-11)
    We perform first principles molecular dynamics simulations to investigate the magnetoelectronic response of substitutionally-doped boronitrene to thermal excitation. We show that the local geometry, size and edge-termination ...
  • Heat treatment of glassy carbon implanted with cesium at room and high temperatures 
    Langa, Dolly Frans; Van der Berg, Nic (Nicolaas George); Friedland, Erich Karl Helmuth; Malherbe, Johan B.; Botha, A.J.; Chakraborty, P.; Wendler, E.; Wesch, W. (Elsevier, 2012-02-15)
    The effect of annealing temperature on the surface morphology and on the diffusion of cesium ions implanted into glassy carbon (Sigradur® G) is reported. The samples were implanted with 360 keV cesium ions to a fluence of ...
  • Helium and strontium co-implantation into SiC at room temperature and isochronal annealing : structural evolution of SiC and migration behaviour of strontium 
    Mokgadi, Thapelo Freddy; Abdalla, Zaki Adam Yousif; Abdelbagi, Hesham Abdelbagi Ali; Msimanga, Mandla; Maepa, Charity E.; Skuratov, Vladimir; Hlatshwayo, Thulani Thokozani (Elsevier, 2023-01)
    Understanding the structural evolution of SiC implanted with fission product surrogates in the presence of helium (He) is of importance for its application in both fission and fusion rectors. In this study, polycrystalline ...
  • High electrochemical performance of hierarchical porous activated carbon derived from lightweight cork (Quercus suber) 
    Ochai-Ejeh, F.O. (Faith); Bello, Abdulhakeem; Dangbegnon, Julien K.; Khaleed, Abubakar A.; Madito, M.J. (Moshawe); Bazegar, Farshad; Manyala, Ncholu I. (Springer, 2017-09)
    Activated carbon (AC) derived from biomass lightweight cork (Quercus suber) material was synthesized by KOH activation with different mass ratios of Q. suber: KOH in order to investigate the electrochemical properties of ...
  • High electrochemical performance of hybrid cobalt oxyhydroxide/nickel foam graphene 
    Masikhwa, T.M. (Tshifhiwa); Madito, M.J. (Moshawe); Momodu, Damilola Y.; Bello, Abdulhakeem; Dangbegnon, Julien K.; Manyala, Ncholu I. (Elsevier, 2016-12)
    In this study, we report the in-situ hydrothermal synthesis of mesoporous nanosheets of cobalt oxyhydroxide (CoOOH) on nickel foam graphene (Ni-FG) substrate, obtained via atmospheric pressure chemical vapour deposition ...
  • High energy and excellent stability asymmetric supercapacitor derived from sulphur-reduced graphene oxide/manganese dioxide composite and activated carbon from peanut shell 
    Tarimo, Delvina Japhet; Oyedotun, Kabir Oyeniran; Mirghni, Abdulmajid Abdallah; Sylla, Ndeye Fatou; Manyala, Ncholu I. (Elsevier, 2020-09)
    Please read abstract in the article.