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Alade Oluwatomi Modupeola,Idowu Rasheed Ajani APEC국제교육협력원 2017 Asia-Pacific Cybereducation Journal Vol.13 No.2
Education is undoubtedly the greatest instrument which man has devised for his own progress. All societies have one form of education or another but the use to which it is put varies. This study investigated study habits, academic locus of control and self-efficacy as correlates of academic achievement among undergraduate students of the University of Lagos, Nigeria. A descriptive research survey was utilised for the study. The sample consisted of 524 undergraduate students selected from five faculties through proportional stratified random sampling technique. Three research questions and corresponding hypotheses were tested at .05 significant level while data were generated using standardized psychological tests which are Internal Control Index (ICI), Self-Efficacy Scale (SES), Study Habit Inventory (SHI) and Cumulative Grade point Average (CGPA) of the participants. Pearson Product Moment Correlation Coefficient Statistics was used to analyse the data. Results obtained showed a significant relationship between study habits, locus of control, self-efficacy and academic achievement among undergraduate students of the University of Lagos, Nigeria. It was recommended that parents, lecturers and the stakeholders on the campus and in the society at large should empower the undergraduate students to match both external and internal locus of control by self-efficacy, competence and effective study habits to achieve their academic goals.
Amidu, Muritala Alade,Park, Junseok,Park, Youngjae,Lim, Changhwan,Jung, Satbyoul,Kim, Hyungdae Elsevier 2017 Nuclear engineering and design Vol.323 No.-
<P><B>Abstract</B></P> <P>Two-phase heat exchanger immersed in a passive containment cooling water storage tank (PCCWST) is a key component of the passive containment cooling system (PCCS) in light water reactors. Condensation and boiling heat transfer phenomena taking place on the inside and outside walls are crucial to the performance of the heat exchanger tube. The performances of such phenomena can be readily affected by the inclination angle of the heat exchanger tube under buoyancy-driven convection conditions in a PCCWST. However, to date no systematic examination of the effects of inclination angle on pool heat exchanger performance has been reported. This paper presents the results of numerical and experimental analyses of how inclination angle affects the performance of a single steam condensation tube immersed in a saturated water pool. To concurrently predict the two-phase heat transfer processes inside and outside the heat exchanger tube, an explicit heat structure coupling of two thermal-hydraulic codes was implemented using open media models. An experimental facility was also constructed to test a single-tube heat exchanger under the same conditions as the simulation. A comparison of simulation data and experimental results obtained for the reference case (tube inclination of 30°) confirmed that the coupled code could predict the heat transfer rate in the pool heat exchanger within the error limits of the experimental measurements. In light of this, additional simulations and experiments were conducted at varying inclination angles, from 3° to 90°. The results of simulations and experimental studies revealed that the heat transfer rate of a heat exchanger tube in a saturated pool is hardly influenced by tube inclination. Although an increase in inclination angle caused the vapor slug to spread around the heat exchanger tube surface, preventing liquid from getting to the surface of the tube, thereby decreasing boiling heat transfer coefficients, this was compensated for by an increase in condensation heat transfer coefficients as the inclination angle increased as a result of accelerated condensate liquid film in the tube. Thus, the overall effect of inclination angle on the thermal performance of a single-tube pool heat exchanger is inconsequential.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Performance of a single condensation tube immersed in a saturated pool was studied. </LI> <LI> Explicit heat structure coupling of CUPID and MARS codes was implemented. </LI> <LI> Simulations using coupled code and validation experiments were performed. </LI> <LI> Inclination angle has no significant effect on performance of a condensation tube. </LI> </UL> </P>
Exploiting the Potentials of Rice Husk Ash as Supplement in Cement for Construction in Nigeria
Akindehinde Ayotunde Akindahun,Oluwotosin Alade 한국콘크리트학회 2010 International Journal of Concrete Structures and M Vol.4 No.1
This paper present the results of investigation on the use of rice husk ash as a partial substitute for cement in construction. One hundred and eighty specimens of concrete cubes were cast. 0, 5, 10, 15, and 20% partial replacement of cement with rice husk ash were carried at 1:2:4 mixes by weight with 0.60, 0.65, 0.70 water/cement ratio. The results indicated that compressive strengths of cubes at 0.6, water/cement were higher than 0.65 and 0.70. Also 5% partial replacement cement with rice husk ash at 28<SUP>th</SUP> day average compressive strength value of 25.4 N/mm² compared well with 0% partial replacement of cement with rice husk ash of 26.28 N/mm². This shows that at 5% partial replacement of cement with rice husk ash can be used for structural concrete and at 15% replacement or more it can be used for non - structural construction works or light weight concrete construction. The cost analysis shows substantial amount of savings for the country.
Exploiting the Potentials of Rice Husk Ash as Supplement in Cement for Construction in Nigeria
Akindahunsi, Akindehinde Ayotunde,Alade, Oluwotosin Korea Concrete Institute 2010 International Journal of Concrete Structures and M Vol.4 No.1
This paper present the results of investigation on the use of rice husk ash as a partial substitute for cement in construction. One hundred and eighty specimens of concrete cubes were cast. 0, 5, 10, 15, and 20% partial replacement of cement with rice husk ash were carried at 1:2:4 mixes by weight with 0.60, 0.65, 0.70 water/cement ratio. The results indicated that compressive strengths of cubes at 0.6, water/cement were higher than 0.65 and 0.70. Also 5% partial replacement cement with rice husk ash at $28^{th}$ day average compressive strength value of $25.4\;N/mm^2$ compared well with 0% partial replacement of cement with rice husk ash of $26.28\;N/mm^2$. This shows that at 5% partial replacement of cement with rice husk ash can be used for structural concrete and at 15% replacement or more it can be used for non - structural construction works or light weight concrete construction. The cost analysis shows substantial amount of savings for the country.
A GOAL PROGRAMMING MODEL FOR THE BEST POSSIBLE SOLUTION TO LOAN ALLOCATION PROBLEMS
Sharma, Dinesh-K.,Ghosh, Debasis,Alade, Julius-A. 한국전산응용수학회 2002 The Korean journal of computational & applied math Vol.9 No.1
In this paper, we propose a multi-Criteria decision making approach to address the problem of finding the best possible solution in credit unions. Sensitivity analysis on the priority structure of the goals has been performed to obtain all possible solutions. The study uses the Euclidean distance method to measure distances of all possible solutions from the identified ideal solution. The possible optimum solution is determined from the minimum distance between the ideal solution and other possible solutions of the Problem.
MANAGEMENT DECISION-MAKING FOR SUGARCANE FERTILIZER MIX PROBLEMS THROUGH GOAL PROGRAMMING
Sharma, Dinesh K.,Ghosh, Debasis,Alade, Julius A. 한국전산응용수학회 2003 Journal of applied mathematics & informatics Vol.13 No.1
This paper presents a goal-programming (GP) model for management decision-making for sugarcane fertilizer mix problems. Sensitivity analysis on the priority structure of the goals has been performed to obtain all possible solutions. The study uses Euclidean distance function to measure distances of all possible solutions from the ideal solution. The optimum solution is determined from the minimum distance between the ideal solution and other possible solutions of the problem. The optimum solution corresponds to the appropriate priority structure of the problem in the decision-making context. furthermore, the results obtained from sensitivity analysis on the cost of combination of fertilizers confirm the priority structure.