Academy of Science of South Africa (ASSAf): Open Journal Systems
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Realising the Right to Electricity Through Off-Grid Power Solutions in South Africa
No full textThe South African government is navigating many basic municipal service delivery challenges, including a growing electricity supply deficit. Eskom Holdings SOC Limited, the state-owned power utility, is struggling to generate and supply a stable and uninterrupted flow of electricity through its grid system. The inadequate generation capacity results in rotating power outages, known as loadshedding, which occur when demand surpasses generating capability. This fundamental service delivery challenge, in conjunction with South Africa's climate change responses, including the decision to work towards energy efficiency, renewable energy and cleaner energy or a "just transition" from coal to clean energy, encourages many South Africans who have the necessary means to invest in off-grid energy solutions that operate alongside and at times independently of Eskom's grid. This paper considers from a legal perspective how and to what extent legislation on electricity supply and municipal by-laws empower household consumers to fulfil their right to electricity by going off-grid. The paper ultimately considers the import of this on South Africa's energy governance framework for electricity provision in the country
Laudatio in Honour of Professor Willemien du Plessis
No full textTribute to Professor Willemien du Plessis
Reconsidering consent for biomedical research using human biological material and associated data
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Introduction to special issue ICAQ'AFRICA2022 Conference: Trends and perspectives in air quality research in Africa
No full textThe ethical debate between what patients want, need and can afford, and what treatment clinicians think they should receive
Get PDFEndodontic emergencies are common procedures in dental practice, and need to be addressed as soon as possible. The initial treatment is usually extirpation of the pulp –also known as emergency root canal treatment (ERCT), –followed by complete cleaning, shaping and obturation ofthe root canal system. Root canal therapy (RCT) needs to be completed with a definitive restoration to increase long term prognosis of the tooth. Both of these carry additional costs. Patients treated in government facilities often have limited access to follow-up care due to long waiting lists, financial constraints or logistical challenges
Impact of surface treatments on the sorption and solubility of a heat-cured denture base material
Get PDFRemovable dentures fabricated from polymethylmethacrylate material are the most common prostheses used to treat edentulism worldwide. This research aimed to compare the sorption and solubility characteristics of a mechanically polished heat-cured acrylic denture material and a light-cured varnished material against non-treated material, all of which were soaked in distilled water. A total of 45 specimens were prepared and tested according to the ISO Standard 20795-1: 2013 (E) to test for sorption and solubility. The data were analysed through one-way analysis of variance (ANOVA) and Tukey-Kramer multiple comparison test
Root and canal morphology of the mandibular first molar: A micro-computed tomography-focused observation of literature with illustrative cases. Part 1: External root morphology
Get PDFThe mandibular first molar often requires endodontic intervention, which can be challenging and complex with several variants in the number of canals and roots. Usually, these teeth have a single mesial and distal root, but variants and anomalies have been noted. The incidence of the number of roots can differ between populations. For instance, up to a third of East Asians present with a third root, while the global prevalence is 8.9%. One- and four-rooted first molar teeth are seldom encountered. Over the years different methods have been used to study root and canal morphology, but micro-computed tomography (micro-CT) has provided a non-invasive method to study root and canal morphology in high definition. This paperis the first of two giving an overview of available literature on various aspects of the external and internal root andcanal morphology of the mandibular first permanent molar. The aim is to provide an overview of relevant aspects of the external root morphology of the mandibular first molar in different populations. The content is supported by illustrative micro-CT images and a report on clinical cases where anomalies have been treated
