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RISS 인기검색어
- 검색키워드
- 저자 : Shadrack, Muya M. (검색결과 8 건)
- 무료
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- 유료
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Shadrack, A.,Kim, C.L. Korean Radioactive Waste Society 2013 방사성폐기물학회지 Vol.1 No.1
This paper describes basic plans for the development of a radioactive waste disposal facility with the introduction of Nuclear Power Plants (NPPs) for Kenya. The specific objective of this study was to estimate the total projected waste volumes of low- and intermediate-level radioactive waste (LILW) expected to be generated from the Kenyan nuclear power programme. The facility is expected to accommodate LILW to be generated from operation and decommissioning of nuclear power plants for a period of 50 years. An on-site storage capacity of 700 $m^3$ at nuclear power plant sites and a final disposal repository facility of more than 7,000 $m^3$ capacity were derived by considering Korean nuclear power programme radioactive waste generation data, including Kori, Hanbit, and APR 1400 nuclear reactor data. The repository program is best suited to be introduced roughly 10 years after reactor operation. This study is important as an initial implementation of a national LILW disposal program for Kenya and other newcomer countries interested in nuclear power technology.
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Anthony Shadrack,김창락 한국방사성폐기물학회 2013 방사성폐기물학회지 Vol.1 No.1
This paper describes basic plans for the development of a radioactive waste disposal facility with the introduction of Nuclear Power Plants (NPPs) for Kenya. The specific objective of this study was to estimate the total projected waste volumes of low- and intermediate-level radioactive waste (LILW) expected to be generated from the Kenyan nuclear power programme. The facility is expected to accommodate LILW to be generated from operation and decommissioning of nuclear power plants for a period of 50 years. An on-site storage capacity of 700 m3at nuclear power plant sites and a final disposal repository facility of more than 7,000 m3 capacity were derived by considering Korean nuclear power programme radioactive waste generation data, including Kori, Hanbit,and APR 1400 nuclear reactor data. The repository program is best suited to be introduced roughly 10 years after reactor operation. This study is important as an initial implementation of a national LILW disposal program for Kenya and other newcomer countries interested in nuclear power technology
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Mutua, Mbuvi P.,Steinaa, Lucilla,Shadrack, Muya M.,Muita, Gicheru M. Korean Society of Animal Science and Technology 2015 한국축산학회지 Vol.57 No.11
Background: Activation of peroxisome proliferator activated receptor gamma ($PPAR{\gamma}$) in the alveolar macrophages (AM) by selective synthetic $PPAR{\gamma}$ ligands, improves the ability of the cells to resolve inflammation. In birds, respiratory macrophages are known as free avian respiratory macrophages (FARM) and show distinct functional differences from AM. The effects of treating FARM with $PPAR{\gamma}$ ligands are unclear. Methods: FARM were harvested by lavage of chicken respiratory tract and their morphology assessed at microscopic level. The effects of $PPAR{\gamma}$ agonists on the FARM in vitro viability, phagocytic capacity and proinflammatory cytokine (TNF-${\alpha}$) production were assessed. Results: FARM had eccentric nucleus and plasma membrane ruffled with filopodial extensions. Ultrastructurally, numerous vesicular bodies presumed to be lysosomes were present. FARM treated with troglitazone, a selective $PPAR{\gamma}$ agonist, had similar in vitro viability with untreated FARM. However, treated FARM co-cultured with polystyrene particles, internalized more particles with a mean volume density of 41 % compared to that of untreated FARM of 21 %. Further, treated FARM significantly decreased LPS-induced TNF-${\alpha}$ production in a dose dependent manner. Conclusion: Results from this study show that $PPAR{\gamma}$ synthetic ligands enhance phagocytic ability of FARM. Further the ligands attenuate production of proinflammatory cytokines in the FARM, suggesting potential therapeutic application of $PPAR{\gamma}$ ligands in the management of respiratory inflammatory disorders in the poultry industry.
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( Mbuvi P Mutua ),( Lucilla Steinaa ),( Muya M Shadrack ),( Gicheru M Muita ) 한국동물자원과학회(구 한국축산학회) 2015 한국축산학회지 Vol.57 No.40
Background: Activation of peroxisome proliferator activated receptor gamma (PPAR γ) in the alveolar macrophages (AM) by selective synthetic PPAR γ ligands, improves the ability of the cells to resolve inflammation. In birds, respiratory macrophages are known as free avian respiratory macrophages (FARM) and show distinct functional differences from AM. The effects of treating FARM with PPAR γ ligands are unclear. Methods: FARM were harvested by lavage of chicken respiratory tract and their morphology assessed at microscopic level. The effects of PPAR γ agonists on the FARM in vitro viability, phagocytic capacity and proinflammatory cytokine (TNF-α) production were assessed. Results: FARM had eccentric nucleus and plasma membrane ruffled with filopodial extensions. Ultrastructurally, numerous vesicular bodies presumed to be lysosomes were present. FARM treated with troglitazone, a selective PPAR γ agonist, had similar in vitro viability with untreated FARM. However, treated FARM co-cultured with polystyrene particles, internalized more particles with a mean volume density of 41 % compared to that of untreated FARM of 21 %. Further, treated FARM significantly decreased LPS-induced TNF-α production in a dose dependent manner. Conclusion: Results from this study show that PPAR γ synthetic ligands enhance phagocytic ability of FARM. Further the ligands attenuate production of proinflammatory cytokines in the FARM, suggesting potential therapeutic application of PPAR γ ligands in the management of respiratory inflammatory disorders in the poultry industry.
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Application of the DPSIR Framework to Coastal and Marine Fisheries Management in Kenya
Mumini Dzoga,Danny Mulala Simatele,Cosmas Munga,Shadrack Yonge 한국해양과학기술원 2020 Ocean science journal Vol.55 No.2
Natural resource management frameworks are important in generating information that promotes the development of appropriate policies and regulation for effective management and utilization of different aspects of ecosystems. The Drivers-Pressure- State-Impact and Response (DPSIR) framework is one of such frameworks which has been widely applied globally in assessing, addressing and communicating with regard to environmental problems. This framework provides a nexus between the causes of environmental problems and the resultant pressures, associated impacts and responses needed to resolve and manage specific environmental issues and challenges. Based on improved management evidence for natural resources enabled by the application of the DPSIR framework globally, this paper is a review of the application of the framework in the management of coastal and marine fisheries resources in Kenya. Findings indicate that there exists a limited number of studies which have adopted the DPSIR framework approach in Kenya, and these are mainly focused on terrestrial ecosystems. However, coastal and marine resources have been well studied in Kenya using different methodological approaches that have given insights into the conditions of resources. This review, therefore, analyzed these studies to understand drivers, pressures, states, impacts and responses in relation to coastal and marine fisheries resources in Kenya. The main drivers observed were a high population growth rate of 3.7% as well as a high dependency rate on natural resources of 74% and 58% in Ngomeni and Kipini fishing areas of north coast Kenya, respectively. There is also a lack of understanding regarding the potential of the DPSIR framework to effectively manage coastal and marine fisheries resources, particularly in the context of sub- Saharan Africa, taking Kenya as a case study. This may result in the development of fisheries regulations that are not holistic in their approach, and therefore, ineffective from a management perspective.
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E-Government as a Tool for Eradicating Corruption in Public Sector: The African Perspective
( Osman Abdul Somed ),( Happiness Kavishe Tairo ),( Mohamed Mintanga Milulu ),( Sani Yashe Hussaini ),( Shadrack Mensah ) 한국정책학회 2015 한국정책학회 추계학술발표논문집 Vol.2015 No.-
Corruption has been identified as a bane to economic development across the globe and the single most serious obstacle to achieving the Millennium Development Goals in Africa in particular. The persistence of the situation despite the enactment of anti-corruption policies to check the practice is a course for concern. The aim in this study is to explore how e-Government could serve as a tool to facilitate the implementation of anti-corruption policies in the three countries which includes Ghana, Tanzania, and Nigeria in perspective. Based on the case analysis, the study found that corruption operates in an atmosphere of uncertainty, excessive use of discretion and relaxed laws. Results suggest that the deployment of e-Government will clarify roles, reduce the use of discretion and human contact and also leave identifiable trails by way of data on actions taken. Finally, the article points out the study``s managerial and policy implications and directions for future research.
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