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Influence of Temperature-Dependent Thermophysical Properties of TiO2-SiO2-ZnO-Fe2O3/PAO Tetra-Hybrid Nanofluid along a Vertical Porous Surface with Suction

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Open Journal of Fluid Dynamics 2024年第3期14卷 123-146页

作者： Philip Iyiola Farayola Lateefat Olanike Aselebe Kafilat Adebimpe Salaudeen Saheed Dolapo Ogundiran tajudeen motunrayo asiru Department of Mathematics and Computing Science Education Emmanuel Alayande University of Education Oyo Nigeria Department of General Studies Federal School of Surveying Oyo Nigeria Department of Pure and Applied Mathematics Ladoke Akintola University of Technology Ogbomoso Nigeria

The significance of the thermophysical properties of Tetra hybrid nanofluid in enhancing heat transmission in various applications like heat exchangers, automobiles, and solar storage cannot be overstated. These features can be tampered with when nanoparticles are been introduced into the base fluid to produce an improved heat carrier fluid for the system. This study investigates the impact of temperature-dependent properties on the movement of TiO2-SiO2-ZnO-Fe2O3/PAO Tetra hybrid nanofluid along a vertical porous surface with suction. The system of governing Partial Differential Equations (PDEs) was formulated and transformed into the system of coupled nonlinear third-order Ordinary Differential Equations (ODEs) by similarity techniques. The resulting ODEs were solved numerically using the shooting method and fourth order Runge-Kutta method with the aid of Maple 18.0 software. Using numerical and statistical methods, the study analyzes velocity, temperature profiles, skin friction coefficient, and Nusselt number. It was found that as the variable thermal conductivity parameter upsurges both the skin friction coefficient and Nusselt number intensify at the rate of 0.011697519 and 8.043581616 respectively. This study underscores the vital role of Tetra hybrid nanofluid’s thermophysical properties in improving heat transmission for diverse appli cations. By manipulating nanoparticles within the base fluid, the heat carrier fluid’s efficiency can be enhanced, critical for industries like automotive and enewable energy. These insights inform the design of more efficient heat exchange systems, advancing sustainability and performance in real-world scenarios.

关键词： Tetra Hybrid Nanofluid Shooting Technique Numerical Method Skin Friction Nusselt Number Thermophysical Properties

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Dose surgical sub-specialization influence survival in patients with colorectal cancer?

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World Journal of Gastroenterology 2003年第5期9卷 961-964页

作者： Cameron Platell Daniel Lim Nazreen tajudeen Karen Wong Department of Surgery University of Western AustraliaFremantle HospitalAustralia

AIM:To perform a review of patients with colorectal cancer to a community hospital and to compare the risk-adjusted survival between patients managed in general surgical units versus a colorectal unit. METHODS:The study evaluated all patients with colorectal cancer referred to either general surgical units or a colorectal unit from 1/1996 to 6/*** results were compared to a historical control group treated within general surgical units at the same hospital from 1/1989 to 12/1994.A Kaplan- Meier survival analysis compared the overall survivals (all- cause mortality) between the groups.A Cox proportional hazards model was used to determine the influence of a number of independent variables on *** variables included age,ASA score,disease stage,emergency surgery, adjuvant chemotherapy and/or radiotherapy,disease location,and surgical unit. RESULTS:There were 974 patients involved in this study. There were no significant differences in the demographic details for thethree *** in the colorectal group were more likely to have rectal cancer and Stage Ⅰ cancers, and less likely to have Stage Ⅱ *** treated in the colorectal group had a significantly higher overall 5-year survival when compared with the general surgical group and the historical control group (56 % versus 45 % and 40 % respectively,P<0.01).Survival regression analysis identified age,ASA score,disease stage,adjuvant chemotherapy,and treatment in a colorectal unit (Hazards ratio:0.67;95 % CI:0.53 to 0.84,P =0.0005),as significant independent predictors of survival. CONCLUSION:The results suggest that there may be a survival advantage for patients with colon and rectal cancers being treated within a specialist colorectal surgical unit.

关键词： Adult Aged Aged, 80 and over Colorectal Neoplasms Colorectal Surgery Comparative Study Female Hospitals, Community Hospitals, Teaching Humans Male Middle Aged Surgery Survival Rate Treatment Outcome Western Australia

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Thirty years of endoscopic sinus surgery:What have we learned?

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World Journal of Otorhinolaryngology-Head and Neck Surgery 2017年第2期3卷 115-121页

作者： Bobby A.tajudeen David W.Kennedy Department of Otorhinolaryngology-Head and Neck Surgery Rush University Medical Center ChicagoIL USA Department of Otorhinolaryngology-Head and Neck Surgery Perelman School of Medicine University of Pennsylvania Philadelphia PA USA

Prior to adaptation of endoscopic approaches for sinonasal pathology,patients regularly endured significant morbidity from open approaches to the sinonasal cavity that were often fraught with *** improvements in transnasal endoscopy,functional endoscopic sinus surgery subsequently emerged from the work ofMlesserklinger and other pioneers in the *** popularity of endoscopic sinus surgery quickly escalated and expanded to pathology other than ***,we discuss the evolution of endoscopic sinus surgery as it relates to improvements in understanding disease pathogenesis,improvements in instrumentation and expansion of indications.

关键词： Chronic sinusitis Endoscopic sinus surgery Skull base surgery

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Prison Types and Inmates’Psychosocial Profiles:A Comparison between Medium and Maximum Security Prison

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Journal of Forensic Science and Medicine 2017年第3期3卷 128-131页

作者： tajudeen Abiola Aisha Y Armiyau Laipo Adepoju Owoidoho Udofia Department of Medical Services Federal Neuropsychiatric HospitalKaduna Department of Psychiatry Forensic UnitUniversity of Jos Teaching HospitalJos Department of Psychiatry Federal Medical CenterBida Department of Psychiatry University of Calabar Teaching HospitalUniversity of CalabarCalabarNigeria

Studies on the impacts the type of prison’s environment had on the psychosocial well‑being of their inmates were *** contribute more study on this,the current study explored the psychosocial health profiles of inmates and the type of prison environment by comparing inmates’psychosocial profiles of a medium security prison to a maximum security correctional facility located in north central *** were male inmates of medium security prison located in Bida,Niger‑State and Jos maximum security facility in Plateau‑*** the participants filled the study instruments(i.e.,a sociodemographic questionnaire,the ten‑item personality inventory,resilience scale,and Oslo Social Support Scale)after obtaining informed consent from *** was a significant positive association of prison types with resilience and social support which was reversed for *** multivariate analysis showed that inmates of medium security prison had significantly higher resilience and social support scores compared to those in maximum security correctional *** was no difference in the five dimensions of personality among the inmates and in their experience of *** findings add to extant knowledge on the impact that the level of“indigenous”deprivations had on inmates psychosocial wellness *** study hence advocated to the department of correctional services to modify the indigenous measures that promote resilience and social support without compromising security.

关键词： Inmates’psychosocial profile personality traits prisons’types resilience social support spirituality

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Importance of dietary supplementation of soluble and insoluble fibers to sows subjected to high ambient temperatures during late gestation and effects on lactation performance

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动物营养学报 2023年第1期16卷 73-83页

作者： Seung Min Oh Abdolreza Hosseindoust Sang Hun Ha Jun Young Mun Joseph Moturi Habeeb tajudeen Yo Han Choi Su Hyup Lee Jin Soo Kim Gyeongbuk Livestock Research Institute Yeongju 63052 Republic of Korea Department of Animal Industry Convergence Kangwon National University Chuncheon 24341 Republic of Korea Swine Division National Institute of Animal Science Rural Development Administration Cheonan 31000 Republic of Korea Department of Swine Science Korea National University of Agriculture and Fisheries Jeonju 54874 Republic of Korea

Heat stress adversely affects sows' performance, which can be improved by applying proper nutritional strategies. This study was conducted to investigate the interactive effects of dietary fiber levels and sources on sows' reproductive performance, metabolic response during gestation, and the carry-over influence on litter performance in the lactation period during heat stress (average room temperature of 27.1 °C). Fifty-four multiparous sows (Landrace × Yorkshire; initial body weight of 236.3 ± 16 kg; 2, 3 and 4 parities) at d 90 of gestation were assigned to a 2 × 3 factorial arrangement (9 sows/treatment), involving 2 dietary fiber levels (4.5% and 6% crude fiber) and 3 dietary fiber sources (wheat bran [WB], palm kernel meal [PK], and beet pulp [BP]). Sows fed the BP diet had highest ( P P P = 0.041) and litter weight ( P P P P = 0.036) hair cortisol. The blood insulin concentration of sows was higher ( P = 0.026) in the high fiber (6%) treatment compared with the low fiber (4.5%) treatment at 90 min and 120 min after the meal. The concentration of phthalic acid, succinic acid, phenylethylamine, hydrocinnamic acid, iron, linoleic acid, glycerol, ketone, and formamide were increased ( P View The PDF

关键词： Soluble fiber Insoluble fiber Beet pulp Wheat bran Palm kernel Metabolites

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Activity Based Costing Adoption Among Manufacturing Companies in Nigeria

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Journal of Modern Accounting and Auditing 2012年第1期8卷 40-45页

作者： Rafiu Oyesola Salawu tajudeen John Ayoola Obafemi Awolowo University Ile-Ife Nigeria

The study examines the extent of adoption of Activity Based Costing （ABC） among naanufacturing companies in Nigeria. The primary data were sourced through questionnaires administered to the Management Accountants of 40 selected manufacturing companies in South Western part of Nigeria. Descriptive statistics was employed to analyze the data. The study reveals that inability of the traditional cost systems to provide relevant cost was the most highly ranked reason in their decision to adopt ABC. Traditional methods of allocating overhead were therefore believed to be deficient in terms of improving global competitiveness. Also, 60% of the respondents have adopted ABC due to increased ranges of products, competition and increased overhead. Familiarity with and adoption of ABC was found to be across the manufacturing, more than half of the sample are familiar with it. The 40% of respondents who have not adopted ABC cited the cost and complexity involved with implementation as the main reason in non-adoption. However, cost of implementing ABC was enormous which hinder the small scale manufacturing from adopting it. This result may reflect the fact that larger firms are more likely to have the diverse mix of products or services that makes the use of ABC advantages. Consequently, the study recommends that the companies who have not adopted ABC because of its high cost of implementation should endeavor to consider its adoption because in the long run the benefits derive from it will outweigh its cost. It helps to identify inefficient products, departments and activities and helps to allocate more resources on profitable products. In conclusion, the senior management should also give their utmost support to the implementation and success of ABC.

关键词： adoption activity based costing manufacturing sector Nigeria

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Strategies for Effective Teaching and Learning of Reading Skill in English

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Sino-US English Teaching 2012年第4期9卷 1074-1082页

作者： Bolanle tajudeen Opoola Ayobami Fatimo Opoola Federal College of Education Oyo Nigeria

Reading is a pertinent skill of the four basic language skills. English teaching and learning in Nigeria cannot but be given all special attention since it is the major language of administration, economics, religious propagation, and others in the nation. This paper has traced the treatment of reading aspect of English in the Nigerian Junior Secondary Schools using the teachers, students, and the nation＇s curriculum as instrument of operation. Some of the problems militating against effective teaching of reading skill in English were identified and discussed. Recommendations for achieving effective language teaching and learning focusing on English reading skill were highlighted. In the end, English teachers＇ attention is drawn on better ways of teaching reading as an important skill of the English language education

关键词： Fasola phobia NERDC (Nigeria Educational Research and Curriculum Development Commission) NIP (Noting Pad) Ejigbo major language reading skills

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Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Coinfection with Malaria in Selected States in Nigeria

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Advances in Infectious Diseases 2024年第2期14卷 442-455页

作者： Oluwagbemiga Olanrewaju Aina Olufemi Samuel Amoo Kazeem Adewale Osuolale Adewale Kayode Ojogbede Azuka Patrick Okwuraiwe David Ayoola Oladele Adesola Zaidat Musa tajudeen Akanji Bamidele Celestina Onyinye Okoyenta Abideen Olurotimi Salako Toyosi Yekeen Raheem Ifeoma Eugenia Idigbe Fehintola Anthonia Ige Joseph Ojonugwa Shaibu Gregory Aigbe Ohihoin Kikelomo Wright Bisola Adebayo Hussein Abdu-Razzaq Abdulrahman Ahmad Mustapha Imam Bashir Bello Tambuwal Muhammad Shuaibu Gobir Richard Ikwuogu Christian Tetsola Gloria Patrick-Ferife Nathaniel Enamuotor Mildred Okowa William Nwachukwu Cornelius Ohonsi Magdalene Egede Chinwe Ochu Ehimario Igumbor Oliver Chukwujekwu Ezechi Babatunde Lawal Salako Rosemary Ajuma Audu Biochemistry and Nutrition Department Nigerian Institute of Medical Research Lagos Nigeria Centre for Human Virology and Genomics Microbiology Department Nigerian Institute of Medical Research Lagos Nigeria Monitoring and Evaluation Unit Nigerian Institute of Medical Research Lagos Nigeria Public Health and Epidemiology Department Nigerian Institute of Medical Research Lagos Nigeria Clinical Sciences Department Nigerian Institute of Medical Research Lagos Nigeria Molecular Biology and Biotechnology Department Nigerian Institute of Medical Research Lagos Nigeria Department of Community Health & Primary Health Care Lagos State University College of Medicine Lagos State University Teaching Hospital Lagos Nigeria Research Unit Lagos State Ministry of Health Lagos Nigeria Sokoto State Ministry of Health Sokoto Nigeria Department of Medical Biochemistry Usmanu Danfodiyo University Sokoto Nigeria Centre for Advanced Medical Research and Training Usmanu Danfodiyo University Sokoto Nigeria Delta State Ministry of Health Asaba Nigeria Nigeria Centre for Disease Control Abuja Nigeria Center for Infectious Disease Research Nigerian Institute of Medical Research Lagos Nigeria

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and Plasmodium species are the causative agents of coronavirus disease 2019 (COVID-19) and malaria respectively with similar clinical presentations. The objective of this study is to determine the burden of co-infection of SARS-CoV-2 and malaria in the general population. Five (5 mLs) of blood samples were collected for SARS-CoV-2 and malaria parasite test. The malaria test was performed using a commercially available one-step malaria antigen Plasmodium falciparum histidine-rich protein 2 (Pf HRP-II) rapid test kit. The results of the study showed that the participants that were coinfected with SARS-CoV-2 IgG and malaria were 13 (2.5%) in Lagos, 1114 (39.1%) in Delta and 49 (2.3%) in Sokoto States. The prevalence of coinfection of SARS-CoV-2 and malaria in urban areas in Lagos, Delta and Sokoto States were 7 (2.2%), 1373 (48.1%), and 5 (0.2%) respectively. In rural areas, the prevalence of coinfection of SARS-CoV-2 and malaria in Lagos, Delta and Sokoto States were 6 (0.3%), 365 (12.8%), and 44 (2.1%) respectively in this study. This suggests that participants in the urban areas were more prone to co-infections than the rural areas in Lagos and Delta states, while it was otherwise in Sokoto State. In conclusion, the co-infection of SARS-CoV-2 and malaria was very high in Delta State compared to the other States. It is important for clinics to screen for both diseases when patients present with symptoms of malaria. This is because the infections have similar symptoms and the public is quick to assume malaria infection without diagnosing for COVID-19 and vice versa.

关键词： SARS-CoV-2 Malaria Coinfection

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Runge-Kutta Schemes Coefficients Simulation for Comparison and Visual Effects

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Engineering（科研） 2013年第5期5卷 530-536页

作者： tajudeen Abiola Ogunniyi Salau Olusegun Olufemi Ajide Department of Mechanical Engineering University of Ibadan Ibadan Nigeria

Runge-Kutta scheme is one of the versatile numerical tools for the simulation of engineering systems. Despite its wide and acceptable engineering use, there is dearth of relevant literature bordering on visual impression possibility among different schemes coefficients which is the strong motivation for the present investigation of the third and fourth order schemes. The present study capitalise on results of tedious computation involving Taylor series expansion equivalent supplemented with Butcher assumptions and constraint equations of well-known works which captures the essential relationship between the coefficients. The simulation proceeds from random but valid specification of two out of the total coefficients possible per scheme. However the remaining coefficients are evaluated with application of appropriate function relationship. Eight and thirteen unknown coefficients were simulated respectively for third and fourth schemes over a total of five thousand cases each for relevant distribution statistics and scatter plots analysis for the purpose of scheme comparison and visual import. The respective three and four coefficients of the slope estimate for the third and fourth schemes have mix sign for large number of simulated cases. However, none of the two schemes have above three of these coefficients lesser than zero. The percentages of simulation results with two coefficients lesser than zero dominate and are respectively 56.88 and 77.10 for third and fourth schemes. It was observed that both popular third and fourth schemes belong to none of the coefficients being zero classification with respective percentage of 0.72 and 3.28 intotal simulated cases. The comparisons of corresponding scatter plots are visually exciting. The overall difference between corresponding scatter plots and distribution results can be used to justify the accuracy of fourth scheme over its counterpart third scheme.

关键词： Runge-Kutta Visual Effects Simulation Coefficients Taylor Series and Butcher Assumptions

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轻轨列车车顶设备舱散热分析与优化

轻轨列车车顶设备舱散热分析与优化

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作者： tajudeen Hussein Tayo（胡社影）中南大学

学位级别：硕士

城市化是21世纪一个重要的经济和社会变革,现在近一半的世界人口居住在城市地区。城市化的快速发展突显了评估公共交通选择的重要性以服务城市不同地区。新的铁路交通解决方案——轻轨列车,已经开发出来以满足这种需求,轻轨列车在许多... 详细信息

城市化是21世纪一个重要的经济和社会变革,现在近一半的世界人口居住在城市地区。城市化的快速发展突显了评估公共交通选择的重要性以服务城市不同地区。新的铁路交通解决方案——轻轨列车,已经开发出来以满足这种需求,轻轨列车在许多发展中国家的大中型城市中越来越受欢迎。轻轨列车(Light Rail Vehicles LRV)涵盖了一系列铁路应用,从市内电车到连接城市与其外部郊区的铁路。这些交通方式不仅在运行气候中的空气特征上有所不同,还在其他几个重要方面有所不同。虽然在大多数情况下区分轻轨列车、轻轨交通和地铁列车具有一定难度,但轻轨列车一般与任何形式的快速公共交通系统相关联,与欧洲和大多数亚洲地区的更重型的快速公共交通系统如地铁不同,其相对较低的运行频率或短编组车辆。轻轨列车或轻轨交通是一种城市轨道公共交通方式,通常具有比重型铁路和地铁系统更低的容量和速度,但比传统的街道电车系统具有更高的容量和速度。相比于地铁,轻轨列车具有能够集成到城市中的优势,这些地方空间有限,使它们能够运输大量的日常通勤者。此外,轻轨列车相对较方便,可以作为城市的中央动脉,连接其他运输方式,并实现轨道连接市区周边和从市区边缘到内部城市的径向访问。轻轨可以轻松地运行在人口只有15万的城市中。轻轨列车通常由2-3辆车组成,平均时速约为50-70公里/小时,具体时速取决于站点的密度。轻轨列车提供了一种经济实惠和高效的公共交通选择,是适应快速城市化需求的卓越解决方案。轻轨车辆已成为许多发展中国家内受欢迎的公共交通方式,为城市内的乘客提供了一种经济实惠的交通解决方案,并连接了邻近的城镇和郊区。然而,LRV的独特设计带来了一些挑战,特别是在列车车顶的设备舱所产生的热量管理方面。为了克服这一难题,研究人员进行了一项研究,以优化设备舱的热性能。该舱内安装了各种发热设备,包括牵引变流器、制动电阻器、暖通空调系统和储能电池,这些设备对于列车的安全和高效运行至关重要。然而,随着列车行驶,设备舱会产生大量的热量,这可能会导致不理想的冷却和潜在的过热风险。该研究旨在调查列车行驶时设备舱内的热流行为和温度分布,并且考虑环境操作条件对设备舱散热现象的影响。本研究采用了数值模拟的方法以更好地了解舱体的热性能,并确定优化的方向。列车设备间速度流场和温度场模拟的目的是监测列车运行过程中设备周围的空气温度是否低于最高允许温度,然后预测和判断列车和这些设备是否能正常工作。这项研究对确保LRV乘客的安全和舒适等方面具有非常重要的意义,并可以为未来公共交通系统的设计和运营方面提供有价值的参考。为了模拟列车周围以及设备舱附近周围湍流流动的行为,本研究使用了ANSYS ICEM软件中的三维网格有限体积法对Navier-Stokes方程进行离散化处理。雷诺平均Navier-Stokes(RANS)方程用于模拟平均流量的传输。并考虑了各种湍流尺度。这种基于RANS的方法大大可以减少了仿真计算中所需的计算工作时间和计算资源,使其成为实际气动应用的流行选择。两方程模型是最简单和最完整的湍流模型,因为它通过解决两个分离的传输方程来对湍流速度和长度尺度进行独立确定。Realizable k-epsilon模型是实际工程流动计算中最广泛使用的模型,因为它在各种湍流流动中具有好的鲁棒性、经济性和合理的精度。为此,本研究建立了一个1:1比例的轻轨列车模型,由两节车厢组成。然而,由于车辆内/外结构具备良好的对称性,本文根据已有的研究结果对一个车厢进行数模模拟研究,从而保证我们的研究结果对其他类似的大型交通工具起到指导和借鉴作用。在列车结构方面,整个列车可以分为五个部分,分别为Motor module with driver cab 1(Mc1),floating module 1(F1),trailer module with a pantograph(Tp),Floating module 2(F2),和Motor module with simple driver cab 1(Msc1)。对于本文所研究的全尺寸列车模型,其外形长度为4米、宽度为2.5米、高度为3.8米。此外,考虑到实际车厢的结构极其复杂,对计算模型进行简化是十分必要的。为了不影响计算精度和保证结果准确性,本文仅移除了车辆的受电弓和转向架结构。与此同时,为了全面分析列车设备舱环境的流场特征(包括空气温度和速度),本研究必须在仿真中保留列车顶罩所有的几何结构特征,并且将所有具有热源、主动冷却或对热敏感的设备都包含在模拟中。设备布局对列车两侧对称。Mc1模块包括驾驶室空调、牵引和辅助变流器以及制动电阻器。对于列车模型而言,制动电阻器是列车制动系统的重要组成部分。它有助于将移动列车的动能转化为热能,然后通过冷却风扇消散到空气中。F1模块包括高速断路器、客车空调、储能电

关键词：设备舱制动电阻温度分布导流板

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