Ladoke Akintola University of Technology

About: Ladoke Akintola University of Technology is a education organization based out in Ogbomoso, Nigeria. It is known for research contribution in the topics: Population & Adsorption. The organization has 2786 authors who have published 3066 publications receiving 36850 citations. The organization is also known as: Oyo State University of Technology & LAUTECH.

Biotreatment of petroleum refinery wastewater in vertical surface-flow constructed wetland vegetated with Eichhornia crassipes: lab-scale experimental and kinetic modelling

Abstract: The objectives of this study were to evaluate the potential of vertical surface flow constructed wetland (VSF-CW) vegetated with Eichhornia crassipes to treat petroleum refinery secondary wastewate...

QTc interval prolongation in HIV-negative versus HIV-positive subjects with or without antiretroviral drugs.

Abstract: Background: QTc interval prolongation signifies an increased risk of life-threatening arrhythmia and sudden cardiac death. Cardiac manifestations of human immunodeficiency virus (HIV) and acquired immunodeficiency syndrome have become increasingly important causes of morbidity and mortality. We investigated HIV-positive patients to determine the effects of HIV infection, antiretroviral drugs, and identifiable confounders on QTc prolongation. Materials and Methods: A case-control study was conducted in a rural tertiary health center in Nigeria. Data collected included demographic variables, body mass index, blood pressure, HIV status, antiretroviral treatment (ART), duration of HIV infection and treatment, CD4 T-lymphocyte count, heart rate (HR), and QT interval. QT was corrected for HR using Bazett's formula. Results: The sample frame comprised 89 (42.4%) HIV-negative subjects (39.3% male, 60.7% female; mean age, 36.28 ± 7.03 years); 45 (21.4%) HIV-positive, ART-naive patients (31.1% male, 68.9% female; mean age, 36.48 ± 9.12 years); and 76 (36.2%) HIV-positive patients on ART (27.6% male, 72.4% female; mean age, 39.00 ± 7.68 years). The QTc interval and resting HR were higher in HIV-positive, drug-naive patients than in the other two groups (P < 0.001). Female sex was associated with prolonged QTc intervals in all groups. Conclusion: HIV-positive patients may be at higher risk of sudden cardiac death due to fatal arrhythmia secondary to QTc interval-related cardiac events. Healthcare providers should be aware that a prolonged QTc interval is a potential indicator of increased cardiovascular risk and should exercise caution in prescribing potentially QT-prolonging medications to HIV-positive patients.

A fuzzy-grey-weighted aggregate sum product assessment methodical approach for multi-criteria analysis of maintenance performance systems

Abstract: Diverse maintenance performance models have been previously proposed in literature. However, many of these frameworks perform inefficiently or are not applicable in real-world problems due to their over-simplified assumptions. Such models do not take into account peculiarities of the maintenance situation in which multiple factors need to be prioritised under uncertain conditions. Keeping the above issues in mind, this communication proposes a framework for ranking maintenance performance systems using integrated fuzzy entropy weighting method, grey relational analysis (GRA) and weighted aggregate sum product assessment (WASPAS). The values of criteria weights were determined using fuzz entropy weighting method. Ranking was carried out using GRA and WASPAS methods. GRA ranking considered a criterion, while WASPAS method considered multi-criteria. It is the belief of the authors that merging these three mentioned tools generates synergy. The synergic advantage of the fusion is that these tools interact to create the combined results of ability to handle logic decisions, or partial information and choice among complex alternatives, demonstrated in this paper. The built-up frame-work was illustrated with practical data from five manufacturing companies operating in Nigeria with information gathered through the questionnaire approach to show that the approach can be effectively implemented in practice. Based on the proposed framework’s results, the highest ranked maintenance system belongs to companies 4 and 5, while the lowest ranked maintenance system belongs to company 5. TOPSIS method was used to determine the best performing maintenance function of the companies. It was observed that maintenance system of company 4 was the highest ranked system. The results from model testing confirmed that the presented scheme is feasibility in industrial settings, efficient and capable of revealing the best company in performance according to certain six input criteria. The novelty of this approach is its uniqueness of the combined frameworks’ structures in achieving the highest accuracy of estimation, introduced for the first time in maintenance performance assessment in a multi-criteria framework.

A Theoretical Study of Performance Measures in the Strategic and Corporate Entrepreneurship of Firms

Abstract: This paper compares performance measures in the corporate and strategic entrepreneurial activities of firms. The paper develops the concepts of strategic entrepreneurship and that of corporate entrepreneurship with the aim of identifying the measures suitable for determining their “end-points” and hence, performance, with respect to the firm’s activities. The paper concludes the performance measures for both entrepreneurial processes need to consider and exploit the salient differences in their operations. When this is done, a “balanced” picture of the firm’s strategic as well as corporate entrepreneurial performance that aligns itself with the dynamic environment, operational processes and stakeholders and such that can enhance continuous improvement will be attainable.