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Search Results: 1 - 10 of 410613 matches for " O.S. Abejide "
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Effectiveness of Base Plate Thickness Design Criteria in Steel Columns
O.S. Abejide
Research Journal of Applied Sciences , 2012,
Abstract: Steel column base plates are one of the most fundamental parts of a steel structure, yet the design of base plates is commonly not given the attention that it should. This result in base plate details that are expensive, difficult to fabricate and may even contribute to the hazards of the steel erection process by not providing stability for erection load applied to the column(s). The effective area method recommended in BS5950 has been used to study the effectiveness of base plate thickness under various loading conditions with due comparison to AISC provisions. Results indicate that although it is a semi-empirical method, it is more reliable than the empirical method recommended in BS5950; also the approach offers more economy and can be used for all column sections.
Evaluation of Restraint Factor for Frames Braced Against Joint Translation
O.S. Abejide,M. Kachalla
Research Journal of Applied Sciences , 2012,
Abstract: The lateral-torsion buckling modification factor, Cb, for Universal Columns in BS 5950 was investigated in order to determine its safety in frames braced against joint translation. These columns were evaluated based on the AISC specification for structural steel buildings. Results indicate that the modification factor Cb varied extensively with the end moment ratios and with associated safety values and column heights (1-7 m) of frames braced against joint translation. The Cb values that can be used depending on the steel section, end moment ratios and column heights are also predicted.
Evaluation of Effective Lengths of Braced Double Angle Diagonals
O.S. Abejide,P.E. Masce
Research Journal of Applied Sciences , 2012,
Abstract: The effective lengths required for bracing of double angles have been investigated at all fixity ranges. Results indicate that the effective length factors as used in codes and structural analysis are conservative. Except for certain cases as site conditions may allow, it may be predicted as required. Also these effective length factors as may be predicted are only reliable especially when the slenderness ratios of the double angles are high and in the range of 180-250.
Probabilistic Evaluation of Aluminum Bridge Decks Design Criteria on Steel Girders
A.O. Agboola,O.S. Abejide,A.T. Olowosulu
Journal of Engineering and Applied Sciences , 2012, DOI: 10.3923/jeasci.2010.4.13
Abstract: The probabilistic evaluation of aluminum decks in flexure between girders, using AASHTO LRFD specification is presented. The results show that the evaluated deck is in conformity with AASHTO LRFD specification as regards the target safety value for bridges of 3.5 for load resistance of 1.0, since its safety value is higher than the code prescription that is 4.44 for LRF of 1.0 and 3.39 for LRF of 1.1. These results indicate that aluminum decks as suggested by AlumadeckTM met the requirement for bridge decks and have the ability to carry more live loads than conventional reinforced concrete decks. Also, a comparative study of safety margins of composite action between aluminium decks on steel girders and concrete decks on steel girders gave results that show that AlumadeckTM as proposed is more superior from the view point of strength and serviceability. This result of AlumadeckTM to conventional concrete decks gave a safety index value of 17.33 for the full composite action while that of concrete is only 11.83.
Reduction of the High Technical Power Losses Associated with the Nigerian 330KV Transmission Network
O.S. Onohaebi
International Journal of Electrical and Power Engineering , 2012,
Abstract: This study carried out an in-depth study and analysis of power losses associated with the Nigerian 330 kV and proposed modifications to the existing network to improve the efficiency, reliability, security and ensure good quality power for the citizenry. The research methodology involved the power flow analysis of the existing network and subjecting it to contingency analysis and simulation using Newton-Raphson method in Power World Simulator (PWS) environment. The study revealed that the existing network cannot cope with contingencies leading to very low performance and even blackout at emergencies. The proposed modifications to the 330 kV transmission network which incorporated some additional lines to form more loops and minimal compensation, meet the acceptable voltage limits of 5%. It also reduces the energy losses from 337.5-189.9 MWH, representing 45% improvement over existing network and enhances reliability and security of the transmission grid.
Evaluation of Energy and Micronutrients Intake of Nigerian Adolescent Females: A Case Study of Institutionalized Secondary Schools in Akure South Local Government Area, Ondo State, Nigeria
Ijarotimi O.S.
Pakistan Journal of Nutrition , 2004,
Abstract: The objective of the study is to provide information on the energy and micronutrients intake of Nigerian adolescent females. A cross-sectional surrey was conducted among the 323 institutionalized adolescent females of 10-19 years age range in Akure South LGA, Ondo State. The energy and micronutrient intake were determined by weighing the food intake of the subjects and part of the food samples were subjected to chemical analysis The mean mineral intakes were: Ca 567 mg/kg, Mg 261 mg/kg, Zn 7.58mg/kg, Fe 19.8 mg/kg and P 136.8 mg/kg. And the vitamins intakes were vit. A 860 mg/kg, Thiamine 0.7 mg/kg, Riboflavin 0.28 mg/kg, Niacin 3.27 mg/kg, vit. C 9.1 mg/kg, Vit. D 2.14 mcg/kg Folic acid 9.8 mcg/kg and Vit. B12 1.2 mcg/kg, and the energy intakes was 6.45 MJ. The result showed that high proportion of the subjects were not meeting the RDA for energy and some of the micronutrients intake.
Financial planning in managing corporate finances to balance the real sector
O.S. Bilousova
Marketing ì Mened?ment Innovacìj , 2011,
Abstract: The article motivates the directions for improving the methodology, methods and organization of financial planning in the activity of enterprises in the context of introducing a conceptual approach of financial equilibrium. The principles of financial planning are considered in the process of development and in the modern conditions of economic activity. The improvement of methodological provision of financial planning for enterprises is considered in the context of financial management of an enterprise, which answers the principles of indicative planning.
The interconnection main elements strategy of innovation development of an enterprise
O.S. Yefremov
Marketing ì Mened?ment Innovacìj , 2012,
Abstract: The grounds for consolidation of the concepts of innovation and strategic development of an enterprise have been defined. The appropriateness of introduction of the methodology of the integration of strategic management, marketing and innovation activity for support of sustainable development of enterprises has been substantiated.
Multiple Reflections in Crystals: Natural and Faraday Optical Activity
Kushnir O.S.
Ukrainian Journal of Physical Optics , 2004,
Abstract: A previous analysis of the multiple reflections (MR) of light in crystals is extended to description of particular cases of natural and magnetooptic Faraday optical activity. The differences in manifestations of the MR in the latter effects are discussed and compared with the experimental results. In particular, the MR do not affect the optical rotation related to the natural gyration in case of a rigorously normal light incid-ence. The modifications of the transmittance fit-function of the known polarimetric HAUP technique imposed by the MR are specified. It is shown that the MR in crystals should produce a kind of spurious dichroism.
Protein Electrophoresis and DNA in Herbs Produced from Irradiated Ambrosia maritima Seeds Grown under Soil Salinity and Their Resistance to Insect
O.S. Hussein
American Journal of Plant Physiology , 2012,
Abstract: Damsisa (Ambrosia maritima L.) is one of the wild plants present in Egypt and different African countries of the Nile Valley. It considered as potential source of molluscicides for treatment of infected sites. In this study, DNA amplifications technique and protein electrophoresis were used for the evaluation of response of Damsisa herbs to gamma rays (γ-rays), soil salinity and their interaction on alleviation of salt stress. This study also examined the effect of herb as bio-resistant for insect infestation in Phaseolus beans. Protein electrophoresis revealed that the number of protein bands separated from plants grown in saline soil not changed either grown from irradiated or un-irradiated seeds except 40 Gray (Gy) dose. Meanwhile, it was observed that mixing Damsisa herb with infested Phaseolus beans reduced insect ability to lays eggs or complete life cycle. Also, it was found that herbs produced from irradiated seeds and grown in normal or in saline soil were more effective in destruction of Callosobruchus maculatus insect and decreased the loss from infested beans.
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