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Nsukka, Nigeria

The University of Nigeria , commonly referred to as UNN, is a federal university located in Nsukka, Enugu State, Nigeria. Founded in 1955 and formally opened on 7 October 1960, the University of Nigeria has four campuses – Nsukka, Enugu and Ituku-Ozalla – located in Enugu State and one in Aba, Abia State, Nigeria.The University of Nigeria was the first full-fledged indigenous and first autonomous university in Nigeria, modeled upon the American educational system. It is the first land-grant university in Africa and one of the five elite universities in the country. The university has 15 Faculties and 102 academic departments. The University offers 82 undergraduate programs and 211 postgraduate programmes.The university celebrated its 50th anniversary on October 2010. Wikipedia.

Purpose: This study seeks to examine the management of local content materials for open access institutional repositories in Nigeria. Design/methodology/approach: A survey research design was adopted for this study. A total of 85 librarians from seven government funded universities in South East Nigeria were used for the study. Findings: From the findings 15 local content materials were identified as relevant for publication in institutional repositories. Similarly a major method of acquiring these local contents is by encouraging staff to deposit their publications in the university libraries. It was also found out that providing a subject index to the local contents and their digitization were effective methods of organizing the materials for the institutional repository. The findings also showed that an increase in the visibility of the authors, promotion of university ranking and efficient dissemination of research findings were among the benefits of publishing in institutional repositories. The problems and strategies of publishing in institutional repositories were also identified through the findings. Practical implications: This study will serve as a useful guide for university administrators and librarians who are interested in developing their institutional repositories using local contents available to them. It will also be of great value to project managers who are engaged in the digitization of their local contents. Social implications: Research works generated in Nigeria and other developing countries are poorly disseminated and therefore lack global visibility. The publication of these research findings in institutional repositories of individual universities will not only improve the visibility and utilization of the research but will also increase the global ranking of the universities and researchers who have published the works in the repository. Originality/value: This paper is on the use of local content information resources in building institutional repositories in Nigerian university libraries. These studies will be useful for university libraries, particularly in developing countries, that intend to build their institutional repositories. © Emerald Group Publishing Limited. Source

Fins serve as heat transfer augmentation features in solar air heaters however they increase pressure drop in flow channels. Pin fins are relatively good heat transfer augmentation features with superior aerodynamic performance and as a result find application in some solar air heaters. The exergy optimization method is employed in sizing the pin fin. Results indicate that high efficiency of the optimized fin improves the heat absorption and dissipation potential of a solar air heater. With optimum fin efficiency and superior absorptive coating quality, useful energy losses can be minimized. Some important observations pertinent in design are made. © 2009 Elsevier Ltd. All rights reserved. Source

Attama A.A.,University of Nigeria
Recent Patents on Drug Delivery and Formulation | Year: 2011

Drug delivery system focuses on the regulation of the in vivo dynamics, in order to improve the effectiveness and safety of the incorporated drugs by use of novel drug formulation technologies. Lipids such as fatty acids, triglycerides, vegetable oils and their derivatives, used for developing multiparticulate dosage forms, may be available in solid, semi-solid or liquid state. Solid lipid nanoparticles (SLNs), nanostructured lipid carriers (NLCs) and lipid drug conjugate (LDCs) nanoparticles are novel lipid drug delivery systems. They were devised to address some of the challenges of conventional drug delivery systems ranging from low drug encapsulation efficiency to low bioavailability of Biopharmaceutical Classification Systems (BCS) class II and class IV drugs. SLNs are based on melt-emulsified lipids, which are solid at room temperature and consist of physiologically well tolerated ingredients often generally recognised as safe. NLCs are colloidal carriers characterized by a solid lipid core consisting of a mixture of solid and liquid lipids, and having a mean particle size in the nanometer range. LDC nanoparticles contain drugs linked to lipid particles. This minireview highlights these three different but related technologies in lipid drug delivery. The objectives of their introduction, current applications, major challenges and some patented formulations are highlighted. © 2011 Bentham Science Publishers. Source

Ewelukwa O.,University of Nigeria
BMC health services research | Year: 2013

This paper examines socio-economic and geographic differences in payment and payment coping mechanisms for health services in southeast Nigeria. It shows the extent to which the poor and rural dwellers disproportionally bear the burden of health care costs and offers policy recommendations for improvements. Questionnaires were used to collect data from 3071 randomly selected households in six communities in southeast Nigeria using a four week recall. The sample was divided into quintiles (Q1-Q5) using a socio-economic status (SES) index as well as into geographic groups (rural, peri-urban and urban). Tabulations and logistic regression were used to determine the relationships between payment and payment coping mechanisms and key independent variables. Q1/Q5 and rural/urban ratios were the measures of equity. Most of the respondents used out-of-pocket spending (OOPS) and own money to pay for healthcare. There was statistically significant geographic differences in the use of own money to pay for health services indicating more use among rural dwellers. Logistic regression showed statistically significant geographic differences in the use of both OOPS and own money when controlling for the effects of potential cofounders. This study shows statistically significant geographic differences in the use of OOPS and own money to pay for health services. Though the SES differences were not statistically significant, they showed high equity ratios indicating more use among poor and rural dwellers. The high expenditure incurred on drugs alone highlights the need for expediting pro-poor interventions like exemptions and waivers aimed at improving access to health care for the vulnerable poor and rural dwellers. Source

Anyaegbunam A.J.,University of Nigeria
International Journal of Geomechanics | Year: 2014

The elastic solution of a loaded cross-anisotropic half-space is dependent on the type of anisotropy that is governed by whether the characteristic equation has real and distinct or equal or complex roots. Most previous solutions have been for the case of real and distinct roots and most have also been incomplete. This work presents complete expressions for all stresses and displacements in a homogeneous, linearly elastic cross-anisotropic half-space caused by a surface vertical point load for all three types of anisotropy, which are believed to be more compact and simpler than those given by the only currently existing complete solution. In the present work, only 38 intermediate parameters need to be calculated in order to define all stresses and displacements as compared with the 62 parameters required in the other existing complete solution. Also, an important discovery is made: the surface settlement of a half-space is given by the same formula irrespective of the type of anisotropy, and this parallels the previous discovery that the contact stress of a rigid punch on a half-space is independent of anisotropy. This overrides the current notion that different formulas for the settlement apply when the characteristic equation has real roots and when it has complex roots. Hence, it is concluded that all existing formulas for the surface settlement of a cross-anisotropic half-space caused by distributed surface loads-for the case of real and distinct roots-are valid for all types of anisotropy. It is discovered that a much-publicized solution for the problem of a surface vertically loaded cross-anisotropic half-space is in error. Parametric studies carried out show that all elastic constants strongly influence the horizontal normal stresses and radial displacement. It is believed that the compact formulas presented herein will be appealing to engineers in all parts of the world. © 2014 American Society of Civil Engineers. Source

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