531 research outputs found

    SMEs Adoption of SaaS Cloud Services:A Novel Ontological Framework(Nigeria as a case Study).

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    The future of Information Technology lies in cloud computing, whose primary objective is to reduce the cost of IT services while increasing production output, availability, reliability, flexibility as well as a decrease in processing time. Owing to few exploratory studies that explain the adoption of cloud services, this research tends to understand the factors affecting cloud service adoption decision by SMEs in Nigeria. Also, it proposes a solution based framework to tackle the identified factors in view of promoting cloud service adoption by Nigerian SMEs. In view of the above, this thesis investigates the reason for slow adoption of cloud services with specific emphasis on Nigeria SMEs. Firstly, the existing literature in cloud service adoption by SME is examined based on Systematic Literature Review (SLR) method. This helps to inform the research gap in relation to cloud service adoption technique. Secondly, the thesis uses a mixed method approach integrating quantitative and qualitative methods to gather data through four stages of data gathering approach. The primary data gathering is based on quantitative (survey) stage 1 and qualitative (Focus Group) stage 2, which involves the studies identifying the cloud service adoption challenges specific to Nigeria SMEs. Furthermore, a solution framework CLOUDSME which includes an ontologically developed Decision Support System(DSS) is proposed to tackle the challenge identified in Primary data gathering stage 1and 2. The proposed framework consists of four phases: The first phase deals with gathering information on how various cloud services address dynamic SME user requirements identified in the primary data gathering stage, this phase forms the building block through which the framework is built upon. The second phase which is the prioritisation phase Adopts Analytical Hierarchical Process (AHP) approach to deal with the issue of complex comparison, also the third stage of data gathering (quantitative) is performed whereby a group interview is carried-out to compare and assign weights to service provider offering in addressing user requirements using pairwise comparison scale. The Third phase addressing the issue of cloud service ranking. In this phase, the major contribution of this research is introduced, whereby a new formalism is proposed using rational relationships to tackle the issue of rank reversal associated with the traditional AHP approach. The fourth phase of the framework is the development of the ontological proposed DSS which comprises of the information gathered in phase 1, 2 and 3. The proposed DSS promotes cloud service Knowledge management, service recommendation and service ranking toward cloud service adoption decision making by SME managers. The final stage of the research is the validation phase which comprises of construct validation. As well as user opinion and expert opinion and researcher opinion validation based on a survey (Quantitative) which makes up the fourth stage of the data gathering stages. The findings from the user opinion evaluation and validation prove the CLOUDSME has the capability to tackle the slow adoption of cloud services by Nigeria SMEs

    EXFOR-based simultaneous evaluation for fast neutron-induced fission cross section of thorium-232

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    The 232^{232}Th neutron-induced fission cross section was evaluated from 500 keV to 200 MeV. The experimental 232^{232}Th fission cross sections and their ratios to the 235,238^{235,238}U fission cross sections in the EXFOR library were reviewed and analysed by the least-squares method. The newly published 232^{232}Th/235^{235}U fission cross section ratios from the time-of-flight measurements at the CERN n_TOF and CSNS Back-n facilities were compiled in EXFOR. Additional simultaneous evaluation was performed by including the experimental 233,238^{233,238}U and 239,240,241^{239,240,241}Pu fission cross sections and their ratios. The new evaluation provides the 232^{232}Th fission cross section systematically lower than the JENDL-5 cross section. The reduction is 4% in the plateau region between 2 and 6 MeV and more significant in the subthreshold fission region. The present evaluation reduces the 232^{232}Th fission cross section averaged over the 252^{252}Cf spontaneous fission neutron spectrum from the JENDL-5 evaluation by 4%, which is closer to the other general purpose libraries but underestimates Grundl et al's measurement by 11%.Comment: Submitted to Journal of Nuclear Science and Technolog

    Uncertainties of calculated coincidence-summing correction factors in gamma-ray spectrometry

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    Uncertainty propagation to the ő≥\gamma-ő≥\gamma coincidence-summing correction factor from the covariances of the nuclear data and detection efficiencies have been formulated. The method was applied in the uncertainty analysis of the coincidence-summing correction factors in the ő≥\gamma-ray spectrometry of the 134^{134}Cs point source using a p-type coaxial HPGe detector.Comment: 4 pages, 2 figures, to be published in the proceedings of the "2019 International Conference on Nuclear Data for Science and Technology" (ND2019

    EXFOR-based simultaneous evaluation for neutron-induced fission cross section of plutonium-242

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    The 242^{242}Pu neutron-induced fission cross section was evaluated from 100 keV to 200 MeV. The experimental 242^{242}Pu and 235^{235}U fission cross sections and their ratios in the EXFOR library were reviewed and analysed by the least-squares method. Additional simultaneous evaluation was performed by including the experimental database of the 233,238^{233,238}U and 239,240,241^{239,240,241}Pu fission cross sections and their ratios developed for JENDL-5 evaluation. The 242^{242}Pu fission cross sections from our evaluation and JENDL-5 evaluation are close to each other below 1 MeV while systematically differ from each other above 10 MeV. The cross section from our evaluation is systematically lower than the JENDL-4.0 cross section in the prompt fission neutron spectrum peak region (‚ąľ\sim5% lower around 1 MeV). The newly evaluated 242^{242}Pu fission cross section was verified against the cross section measured in the 252^{252}Cf spontaneous fission neutron field and criticalities of small-sized LANL fast systems, and demonstrated better performance than the JENDL-4.0 cross section on the same level with the JENDL-5 cross section.Comment: Submitted to Journal of Nuclear Science and Technolog

    Systematics of elliptic flow in heavy-ion collisions

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    We analyze elliptic flow from SIS to RHIC energies systematically in a realistic dynamical cascade model. We compare our results with the recent data from STAR and PHOBOS collaborations on elliptic flow of charged particles at midrapidity in Au+ Au collisions at RHIC. In the analysis of elliptic flow at RHIC energy, we find a good fitting with data at 1.5 times a scaling factor to our model, which characterizes that the model is required to have extra pressure generated from the subsequent parton scattering after the initial minijet production. In energy dependence of elliptic flow, we notice re-hardening nature at RHIC energies. Both these two observations would probably imply the possible formation of quark-gluon plasma

    Spousal claims to matrimonial property held in trusts and companies: a Kenyan perspective

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    Submitted in partial fulfillment of the requirements of the Bachelor of Laws Degree, Strathmore University Law SchoolThis study investigates the hiding of matrimonial property by dishonest spouses in trusts or companies to frustrate the rights of the other spouse to the same property. The frustration of such rights usually takes place during divorce proceedings. The objective of the study is to highlight the importance of the issue, and offer a critique of the Kenyan legal system’s ability to resolve it. Where Kenya cannot effectively deal with the problem, recommendations will be made on how the legal system could be improved to do so. The study is conducted mainly through a comparative study of legislation and case law from South Africa and England, since there is a lack of local jurisprudence and information on the issue. The major findings were that Kenya's legal system in fact heightened the dangers sought to be avoided. However, the arguments raised in South Africa and England show that Kenyan courts still have adequate powers to resolve the problem, notwithstanding legislation drafted without prior consideration of the issues highlighted in the study. It is recommended that certain provisions of the Matrimonial Property Act be amended by providing for specific powers of the court in the distribution of matrimonial property, and that the powers grant wide discretion in this exercise

    Compilation of isomeric ratios of light particle induced nuclear reactions

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    Experimental isomeric ratios of light (A‚ȧ\le4) particle-induced nuclear reactions were compiled for the product nuclides having metastable states with half-lives longer than 0.1 sec. The experimental isomeric ratio data were taken from the EXFOR library and reviewed. When an experiment reports isomer production cross sections instead of isomeric ratios, the cross sections taken from the EXFOR library were converted to the isomeric ratios by us. During compilation, questionable data (e.g.,preliminary data compiled in EXFOR in parallel with their final data, sum of isomer production cross sections larger than the total production cross sections) were excluded. As an application of the new compilation, goodness-of-fit was studied for the isomeric ratios predicted by the reaction model code TALYS-1.96

    Formação de professores no Pibid: a utilização da charge no ensino

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    Anais do II Semin√°rio Semin√°rio Estadual PIBID do Paran√°: tecendo saberes / organizado por Dulcyene Maria Ribeiro e Catarina Costa Fernandes ‚ÄĒ Foz do Igua√ßu: Unioeste; Unila, 2014Este trabalho √© fruto das experi√™ncias vivenciadas no Programa Institucional de Bolsas de Inicia√ß√£o √† Doc√™ncia (PIBID), do curso de Geografia, da Universidade Estadual de Londrina/UEL. O objetivo frente ao projeto, desenvolvido por bolsistas do PIBID, foi dinamizar o debate sobre os impactos, no territ√≥rio brasileiro, ap√≥s a FIFA WORLD CUP BRAZIL 2014. Como metodologias da a√ß√£o docente foram usadas charges para abordar a dicotomia entre pa√≠ses subdesenvolvidos e desenvolvidos, al√©m dos aspectos econ√īmico-sociais dos pa√≠ses que sediaram copas anteriormente e os impactos em seus territ√≥rios. Dessa forma, foram lan√ßadas as bases para se refletir sobre os problemas sociais da sociedade brasileira, frente ao momento em que o pa√≠s sediou a Copa do Mundo 2014. O p√ļblico alvo deste projeto foram os alunos do oitavo ano de uma escola da rede p√ļblica em Camb√©, a fim de construir uma vis√£o mais cr√≠tica sobre os impactos do megaevent
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