University of South Africa

About: University of South Africa is a education organization based out in Pretoria, South Africa. It is known for research contribution in the topics: Context (language use) & Population. The organization has 8478 authors who have published 19960 publications receiving 237688 citations. The organization is also known as: Unisa.

Secure cloud computing: Benefits, risks and controls

Abstract: Cloud computing presents a new model for IT service delivery and it typically involves over-a-network, on-demand, self-service access, which is dynamically scalable and elastic, utilising pools of often virtualized resources. Through these features, cloud computing has the potential to improve the way businesses and IT operate by offering fast start-up, flexibility, scalability and cost efficiency. Even though cloud computing provides compelling benefits and cost-effective options for IT hosting and expansion, new risks and opportunities for security exploits are introduced. Standards, policies and controls are therefore of the essence to assist management in protecting and safeguarding systems and data. Management should understand and analyse cloud computing risks in order to protect systems and data from security exploits. The focus of this paper is on mitigation for cloud computing security risks as a fundamental step towards ensuring secure cloud computing environments.

The Notion of Ubuntu and Communalism in African Educational Discourse

Abstract: The notion of ubuntu and communalism is of great importance in anAfrican educational discourse, as well as inAfrican Philosophy of Education and in Africanphilosophical discourse. Ubuntu is aphilosophy that promotes the common good ofsociety and includes humanness as an essentialelement of human growth. In African culture the community always comesfirst. The individual is born out of and intothe community, therefore will always be part ofthe community. Interdependence, communalism, sensitivity towards others and caring for others are all aspects of ubuntu as a philosophy of life (Le Roux, 2000, p. 43). The community and belonging to acommunity is part of the essence of traditionalAfrican life. Philosophy of life and Philosophyof Education, thus, go together, because aphilosophy of life helps to identify the goalsand purposes that a particular society holdsdear. Humanness is very important in Africanphilosophy in the sense of seeing human needs,interests and dignity as fundamental to humanexistence and therefore it will also beimportant in African Philosophy of Education(Letseka, 2000, p. 182). According to Letseka(2000, p. 186) nobody is born with botho orubuntu– these are communally acceptedand desirable ethical standards that a personacquires throughout his/her life and thereforeeducation also plays a very important role intransferring the African philosophy of life.

Synthesis of silver nanoparticles (Ag NPs) for anticancer activities (MCF 7 breast and A549 lung cell lines) of the crude extract of Syzygium aromaticum.

Abstract: In the present report, silver nanoparticles were synthesized using Piper nigrum extract for in vitro cytotoxicity efficacy against MCF-7 and HEP-2 cells. The silver nanoparticles (AgNPs) were formed within 20min and after preliminarily confirmation by UV-Visible spectroscopy (strong peak observed at ~441nm), they were characterized by using FT-IR and HR-TEM. The TEM images show spherical shape of biosynthesized AgNPs with particle size in the range 5-40nm while as compositional analysis were observed by EDAX. MTT assays were carried out for cytotoxicity of various concentrations of biosynthesized silver nanoparticles and Piper nigrum extract ranging from 10 to 100μg. The biosynthesized silver nanoparticles showed a significant anticancer activity against both MCF-7 and Hep-2 cells compared to Piper nigrum extract which was dose dependent. Our study thus revealed an excellent application of greenly synthesized silver nanoparticles using Piper nigrum. The study further suggested the potential therapeutic use of these nanoparticles in cancer study.