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The Metric Theory of Tensor Products (Grothendieck's Résumé Revisited) Part 2: Bilinear Forms and Linear Operators Of Type α
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Joe Diestel Jan Fourie Johan SwartIn this continuation of our exposition and expansion of Grothendieck's 'Résumé,' we broach the subject of bilinear forms and operators of type α, where α is a tensor norm, and follow that up with the closely related subject of α-nuclearity. -
The Metric Theory of Tensor Products (Grothendieck's Résumé Revisited) Part 4: The Role of C (K)-spaces and L1-spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Joe Diestel Jan Fourie Johan SwartIn this continuation of our multiseries on Grothendieck's 'Résumé', we look at the special place of C(K)-spaces and L 1-spaces in the general metric theory of tensor products. -
Some Examples of Weakly Compact, Compact, Absolutely Summing And Nuclear Operators On the Space C [0, 1]
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Dumitru PopaWe give necessary and sufficient conditions that some operators on the space C [0, 1] be weakly compact, compact, absolutely summing and nuclear. -
An Addendum to Popa's Paper
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: BerhaneT. GhaimIn this note we make a few simple observations regarding examples of D. Popa (cf. [3]) concerning weakly compact operators on C[0, 1] and other related classes. -
On Nuclear and Multiple Summing Bilinear Operators on c 0 × c 0
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Gabriela Badea --- Department of Mathematics, RomaniaIn this paper we study the connections between the nuclear operators and the multiple summing bilinear ones defined on c 0 × c 0. We also give an example of a bilinear operator on c 0 × c 0, for... -
Evidence of hybridisation within the genus Chrysoblephus and conserved nuclear sequences of South African sparids (Teleostei: Sparidae)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S von der Heyden --- Evolutionary Genomics Group, Department of Botany and Zoology, South Africa A Connell --- , South AfricaSeveral hybridisation events have been recorded in marine fish, yet there is little information for southern African species. Here we present evidence for hybridisation within the genus Chrysoblephus (Sparidae), by analysing a fish caught off KwaZulu-Natal, off the east coast... -
The phylogenetic affinities of the Socotra Bunting Emberiza socotrana
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Manuel Schweizer --- Naturhistorisches Museum der Burgergemeinde Bern, Switzerland Guy M Kirwan --- Field Museum of Natural History, USAThe monophyly of the African ‘brown bunting’ complex was corroborated by a recent molecular study. However, the little-known Socotran endemic Emberiza socotrana, which is morphologically similar to the other taxa in this complex, was not included. Here we present a... -
Degradation of paracetamol and other constituents in Perfalgan®
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Catherine Curran --- Department of Anaesthesia, South AfricaBackground: The manufacturers of Perfalgan®, a formulation of intravenous paracetamol, recommend that each ampoule be used once only. This is most likely due to concerns regarding degradation of paracetamol or other ingredients in the solution, and sterility issues. However, in... -
Genetic diversity within two Tunisian wild jirds: Meriones shawi and Meriones libycus (Rodentia, Gerbillinae)
Item type: Journal Article • Journal: African Zoology • Authors: Hanene Khemiri --- Laboratory of Animal Ecology, Department of Biology, Sciences Faculty of Tunis, Tunisia João Pimenta --- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Portugal António Amorim --- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Portugal Pascale Chevret --- Laboratoire de Biométrie et Biologie Evolutive – UMR CNRS 5558, France Saïd Nouira --- Laboratory of Animal Ecology, Department of Biology, Sciences Faculty of Tunis, Tunisia Alexandra M Lopes --- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, PortugalThree Meriones species inhabit Tunisia, namely M. shawi, M. libycus and M. crassus, but little genetic data exist on these gerbils. We collected Meriones from eight localities in Tunisia, and obtained mitochondrial (cytochrome b) and nuclear (IRBP) gene sequence data... -
Achieving energy security in Africa: prospects of nuclear energy development in South Africa and Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Eldar Salakhetdinov --- , South Africa Oboshi Agyeno --- , South AfricaAfrica has rich energy resources but continues to remain an energy poor continent. The industrialization potential of the continent and its rapidly growing population have caused a sharp increase in demand for electricity. South Africa and Nigeria are the biggest... -
Exploring the perception of Nigerians towards nuclear power generation
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Daniel R. E. Ewim --- , South Africa Stephen S. Oyewobi --- , Nigeria Michael O. Dioha --- , India Chibuike E. Daraojimba --- , South Africa Suzzie O. Oyakhire --- , Nigeria Zhongjie Huan --- , South AfricaTo decarbonize the Nigerian power sector and ensure a reliable electricity supply, nuclear power will play a key role. However, public acceptance must be considered for the successful introduction of nuclear power. This study examines the perceptions of Nigerians towards... -
A new species of chameleon (Sanria: Chamaeleonidae: Kinyongia) from the Magombera forest and the Udzungwa Mountains National Park, Tanzania
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Michele Menegon --- Museo Tridentino di Scienze Naturali, Italy KrystalA. Tolley --- South African National Biodiversity Institute, Kirstenbosch Research Centre, South Africa Trevor Jones --- c/o Udzungwa Mountains National Park, Tanzania Francesco Rovero --- Museo Tridentino di Scienze Naturali, Italy AndrewR. Marshall --- University of York, UK ColinR. Tilbury --- University of Stellenbosch, South AfricaA new species of chameleon Kinyongia magomberae sp. nov. (the Magombera chameleon), is described from Magombera forest and the Vdzungwa Mountains National Park, south-central Tanzania. The species status is supported by phylogenetic analyses using mitochondrial and nuclear markers. The new... -
The political economy of bilateral aid: African development and the manufacture of consent
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Peter Blunt --- University of New South Wales, Australia Cecilia Escobar --- Independent Researcher and Consultant, Greece Vlassis Missos --- University of Athens, GreeceThis paper discusses implications for African development arising from our analysis of the political economy of bilateral aid (Blunt, 2023). We argue that the existential threats posed to life on Earth by global warming and nuclear war are a product... -
Assessment of genetic and morphological differentiation among populations of the Diederik Cuckoo Chrysococcyx caprius
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Rae M Smith --- South African National Biodiversity Institute (SANBI), South Africa Desiré L Dalton --- South African National Biodiversity Institute (SANBI), South Africa Monica Mwale --- South African National Biodiversity Institute (SANBI), South Africa Lisa J Nupen --- South African National Biodiversity Institute (SANBI), South Africa Chantelle Pretorius --- South African National Biodiversity Institute (SANBI), South Africa Jamie Bojko --- Teesside University, United Kingdom Kim Labuschagne --- South African National Biodiversity Institute (SANBI), South Africa Isa-Rita M Russo --- Cardiff University, United Kingdom Samuel T Osinubi --- FitzPatrick Institute of African Ornithology, University of Cape Town, South AfricaThe Diederik Cuckoo Chrysococcyx caprius is an African species widely distributed south of the Sahara, which migrates seasonally between breeding and nonbreeding sites. It is currently unknown whether the species consists of a single panmictic population or if it is... -
Knowledge, awareness, and perception of senior high school learners towards nuclear energy: A South African case study
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Daniel Raphael Ejike Ewim --- Durban University of Technology, South Africa Yasthil Nundlal --- Durban University of Technology, South Africa Keenan Govender --- Durban University of Technology, South Africa Nokubonga Lungile Nzuke --- Durban University of Technology, South Africa Mfanafuthi Vukani Mbatha --- Durban University of Technology, South Africa Nangamso Gwexa --- Durban University of Technology, South Africa Kelsi Naidoo --- Durban University of Technology, South Africa Opeyeolu T. Laseinde --- University of Johannesburg, South Africa Sogo Mayokun Abolarin --- University of the Free State, South AfricaThis study investigated senior South African high school students’ levels of knowledge, perception, attitude, and awareness toward nuclear energy using paper-based, semi-structured questionnaires and digital data collection instruments through online Google forms. The sample consisted of 100 high school students... -
Tourism resilience in Iran: navigating sanctions, diplomacy and emerging opportunities
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Masood Khodadadi --- University of the West of Scotland, United KingdomThe re-election of Donald Trump as the 47th president of the United States in 2024 marks a significant shift in US-Iran relations, with far-reaching consequences for Iran’s tourism sector. This brief report examines the potential impact of Trump’s foreign policy,...