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Efficient Tour Planning for Tourist Sites Visitation in Lokoja, Nigeria: A Multi-Scenario Analysis Using GIS

Journal of Geographic Information System 2017年第1期9卷 59-81页

作者： Eleojo oluwaseun Abubakar Ojochenemi Idoko Ogbaje Stephen Ocholi Department of Geography and Environmental Studies Kogi State University Anyigba Nigeria School of Geography Politics and Sociology Newcastle University Newcastle upon Tyne UK Department of Environmental Studies School of Tourism Hospitality and Environmental Management University Utara

This study used GIS to analyse various visitation sequence and routes for tourist sites in Lokoja considering multiple scenarios. This was done with a view to determining the most efficient visitation sequence vis-à-vis the routes for optimizing the overall visiting time and distance for the various scenarios considered. The main datasets used were the transportation network and the geographic coordinates of the tourist sites. These were collected through a comprehensive field survey of the study area. The ArcGIS 10.1 Network Analyst Extension was the main software used for this analysis. Five scenarios were considered comprising open and closed tours as well as Sequential Ordering Problems (SOP) and non-SOPs. In addition, for the first and second scenarios, an auxiliary scenario was considered that featured a hypothetical road block on an important arterial route. The fifth scenario considered the implication of a hypothetical flooding of some road sections along the bank of the River Niger. Furthermore, for each scenario, there were two optimization solutions: One that optimized the distance covered in visiting all the tourist sites and the other that optimized the time duration required to complete the site visitations. Optimal visitation sequences were determined by the network analyst as part of the solution of the respective scenarios. Sensitivity analysis was also performed to compare the consequences of time savings vis-à-vis distance savings across the various scenarios. In addition to the detailed navigation map produced for each scenario, a comprehensive navigation description guide was derived. The study reveals that scenarios where the site visitation sequence were optimized saved both time and distance markedly compared to scenarios with a predefined site visitation sequence. In all cases, shorter visitation durations were associated with time-optimized scenarios compared to distance-optimized ones while shorter visitation distances were associated wit

关键词： Tourism Tour Planning GIS Network Analysis Nigeria

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Transesterification of castor oil:neuro‑fuzzy modelling,uncertainty quantification and optimization study

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Systems Microbiology and Biomanufacturing 2023年第4期3卷 669-680页

作者： Kehinde A.babatunde Kazeem K.Salam Olufunmilayo A.Aworanti Olusesan A.Olu-Arotiowa Solomon O.Alagbe Titilayo D.Oluwole Department of Chemical Engineering Ladoke Akintola University of Technology(LAUTECH)P.M.B.4000OgbomosoNigeria

This study conducted experiments used for the development of both the regression model with uncertainty analysis and the adaptive neuro-fuzzy inference system(ANFIS)model for the prediction of the yield of biodiesel(YB)produced from castor oil in the presence of calcium oxide derived from the *** Behnken design(BBD)was used to develop the experimental condition for five different variables while YB was the *** analysis was determined from Monte Carlo simulation(MCS).The model was optimized and validated before the generated data was applied in the three ANFIS modelling *** mean square error(RMSE),coefficient of correlation(R^(2))and average percentage error(APE)were used to determine the accuracy of the models *** result of this modelling shows that the optimum YB(94.29%)was achieved at a methanol to oil ratio of 11.48,catalyst loading of 3.38 wt%,reaction time of 1.84 h,the temperature of 60.2℃,and agitation of 343.5 *** prediction from BBD,ANFIS and MCS agreed that the methanol to oil ratio was the most important parameter for *** considered ANFIS model technique(subtractive clustering)for the modelling of YB outperformed BBD *** novelty of this study are the determination of the optimum condition for the transesterification of castor oil in the presence of thermally treated anthill,the establishment of the use of ANFIS in modelling YB,the prediction of the influence of variables on YB using both statistical and,AI techniques and validation of the predictions from the two methods using MCS.

关键词： Artificial intelligence Calcium oxide Eggshell Biodiesel Modelling Box Behnken design

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Open Journal of Fluid Dynamics 2013年第2期3卷 82-85页

作者： Felix Ilesanmi Alao Samson babatunde Folarin King Fahd University of Petroleum and Mineral Dhahran Saudi Arabia Mathematical Science Department Federal University of Technology Akure Nigeria

This paper determines the influence of the radiation and heat transfer on the compressible boundary layer flow using similarity solutions approach. The Roseland approximation is used to describe the radiative heat flux in the energy equation and the compressible boundary layer equations are transformed using Stewartson transformation. Similarity (invariant) solutions for the governing partial differential equations system are constructed. The shooting method is employed to transform the resulting non-linear boundary value problem into initial value problem, which is solved numerically. The effects of various parameters on the velocity and temperature profiles as well as the Falkner skan exponent and Prandtl number are shown graphically.

关键词： Radiation Heat Transfer Stewartson Transformation Roseland Approximation

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多元分析在上海荷斯坦牛体型性状中的应用

多元分析在上海荷斯坦牛体型性状中的应用

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作者： OLASEGE babatunde SHITTU 上海交通大学

学位级别：硕士

遗传参数是设计动物育种规划和预测选择进展的重要参数,且是群体特异的。本研究使用贝叶斯相关方法对华东地区45,517荷斯坦奶牛的23个体型性状进行了遗传参数估计。并对这些性状进行了综合评价,方法包括:1)使用中国奶牛协会（Dairy Asso... 详细信息

遗传参数是设计动物育种规划和预测选择进展的重要参数,且是群体特异的。本研究使用贝叶斯相关方法对华东地区45,517荷斯坦奶牛的23个体型性状进行了遗传参数估计。并对这些性状进行了综合评价,方法包括:1)使用中国奶牛协会（Dairy Association of China,DAC）提供的综合指数;2)使用主成分分析（PCA）和因子分析（FA）探索这些体型性状之间的关系。综合指数的估计遗传力属于低（肢蹄性状为0.04）到中遗传力（体容量性状为0.23）。单个体型性状（IBCT）之间的遗传相关较高。特征向量大于1的第一至第七主成分和潜在因子都解释了60.37%的变异。第一主成分和第一因子所包含的性状主要是与产奶量相关的性状。使用多性状模型估计的主成分的遗传力（0.07~0.21）及潜在因子的遗传力（0.07~0.23）为低到中等遗传力。多变量之间的遗传相关明显低于单个性状之间的遗传相关。本研究结果表明PCA及FA将体型性状简化为新的变量可用于提高中国荷斯坦牛的遗传进展。另外,PCA和FA可以用于减少估计性状的数量从而提高大数据及复杂性状的分析准确性及降低计算负担。我们对621头具有简化基因组测定（GGRS）基因型的个体开展了全基因组关联分析（GWAS）,并找到了三个相关联的单核苷酸多态性（single nucleotide polymorphism,SNP）位点。其中,10号染色体上的一个SNP被发现与PC1相关,15及24号染色体上的两个SNP与PC3相关。我们研究了位于这三个SNP附近的基因,发现了可能的候选基因。例如,ACOT4-like（acyl-CoA硫脂酶4样）和STIM1（机制相互作用分子1）以及U6（U6剪接体RNA）。这些基因之前都没有被报道与体型性状关联。ACOT4基因在家畜中还没有被定义其特性。STIM1被发现主要在牛主动脉内皮细胞（BAECs）中表达,在钙池操纵钙离子通道（SOCE）和肌醇1,4,5三磷酸受体（IP3R）依赖钙离子释放中都有正向效应。而U6基因之前被证实在内洛尔牛种与繁殖性状相关。下一步计划是开展验证试验来找出这些基因在奶牛体型性状中的角色。

关键词：遗传参数体型性状主成分分析因子分析全基因组关联分析

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基于RS和GIS的地下水富水区评价——以尼日利亚翁多州Owo地区为例

基于RS和GIS的地下水富水区评价——以尼日利亚翁多州Owo地区为例

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作者： ONIBUDO OLUWASEGUN oluwaseun（欧路）中国矿业大学

学位级别：硕士

尼日利亚的发展需求水资源量越来越大,迫切需要大规模增加地下水勘探,增加水资源供应。利用遥感(RS)和地理信息系统(GIS)技术,评价地表地下水富水区是解决这一问题的快速途径。本文主要研究利用RS和GIS技术结合Dempster-Shafer理论(DST... 详细信息

尼日利亚的发展需求水资源量越来越大,迫切需要大规模增加地下水勘探,增加水资源供应。利用遥感(RS)和地理信息系统(GIS)技术,评价地表地下水富水区是解决这一问题的快速途径。本文主要研究利用RS和GIS技术结合Dempster-Shafer理论(DST)评价尼日利亚Ondo州Owo地区地下水富水区。其具体工作如下:首先,获取了原始数据,包括遥感数据、辅助数据和该地区107口地下水井数据。利用研究区Nigeria Sat-X图像,使用PCI Geomatica和Arc GIS软件提取了该研究区的断裂,生成研究区线性结构分布图,统计线性结构分布的方向性特征和密度。编制了专题数据(线性构造密度、降雨、排水密度、斜坡、岩性、土壤和土地利用/土地覆盖)。在编制专题数据过程中,经过数据预处理,提取可能的地下水富水区条件因子,以及利用遥感和地理信息系统(RS和GIS)技术制备用于地下水富水区建模的证据层(线状密度、岩性、坡度、排水密度、土地覆盖/土地利用、降雨、和土壤)。其次,利用Dempster-Shafer证据信度函数理论(DST-EBF)模型,整合了地下水富水区条件因素(岩性、坡度、排水密度、土地覆盖/土地利用、降雨和土壤)。另外,基于DST-EBF模型分类了井位与地下水富水区条件因子之间的统计关系。计算了4个信度函数指数:信度(Bel)、不信度(Dis)、不确定性(Unc)和似然度(Pls)。综合信度函数结果生成地下水富水区(GWRA)图。最后,采用反应工作特征(ROC)技术进行模型验证。通过计算成功率和预测率曲线,评估所提出的Dempster-Shafer证据信念函数理论(DST-EBF)模型的有效性。成功率验证结果显示,DST-EBF模型的曲线下面积为0.814(81%)。另一方面,预测率验证结果显示,DST-EBF模型的AUC为0.741(74%)。本研究的结果表明Dempster-Shafer证据信度函数理论(DST-EBF)模型在划分地下水富水区方面是有效性。

关键词：地下水富水区评价 dempster-shafer模型 GIS 遥感

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A Systematic Review and Meta-Analysis of Depression Prevalence amongst Nigerian Students Pursuing Higher Education

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Journal of Behavioral and Brain Science 2022年第11期12卷 589-598页

作者： Sunny Cui babatunde Ajayi Esther Kim Remare Egonu Department of Biological Science Dartmouth College Hanover USA College of Medicine Lagos State University Lagos Nigeria Department of Medicine University of Toronto Toronto Canada

Depression is one of the most prevalent mental health disorders currently going undiagnosed in many developing countries, including Nigeria. Stigmatization, inadequate financial resources, poor healthcare infrastructure for accurate diagnosis, and low research attention are contributing factors to the prevalence of depression among youths in West Africa. This study estimated the prevalence of depression among higher education students in Nigeria. Data was extracted and examined from 1225 publications by three independent reviewers. To minimize bias, the Agency for Healthcare Research and Quality guidelines was used to assess the data. Pooling of logit-transformed data was done using a generalized linear mixed-effects model, while restricted maximum likelihood was used to estimate between-study variance (τ2). Knapp-Hartung adjustments were included for calculating the confidence intervals around pooled effects, and R was used to calculate pooled estimates of depression prevalence. The risk factors of depression were examined by subgroup analyses and random-effect meta-regression models. Egger’s regression was used to check for publication bias in small-sampled studies with high prevalence estimates. Mean age of students across the 18 studies ranged from 19.09 to 26.3 years, with sample sizes ranging from 81 to 1482 participants. The pooled depression prevalence across studies was 26% (95% CI 0.18, 0.36) with high heterogeneity (I2 = 97%, τ2 = 0.9512). The subgroup analyses showed that higher education students in the Northwestern region of Nigeria have the highest depression prevalence (45.9%), followed by the South-South region (33%), Southeastern (22.1%), and Southwestern region (18.1%). Our findings show that depression among higher education students in Nigeria is highly prevalent. A significant proportion of higher education students in Nigeria are depressed. The factors contributing to the high depression prevalence, particularl

关键词： Depression Public Mental Health Prevalence Global Health Meta-Analysis

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Classification and Management of Mandibular Condyle Fractures in a Tertiary Health Center

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Surgical Science 2013年第8期4卷 339-344页

作者： babatunde O. Akinbami Oladimeji A. Akadiri Department of Oral and Maxillofacial Surgery Dental Center University of Port Harcourt Teaching Hospital Port Harcourt Nigeria

Background: Condyle fractures are not common but could lead to detrimental effects of growth disturbance of the mandible, ankylosis of temporomandibular joint and facial asymmetry especially in children, if not promptly and adequately managed, the aim of this study was to document our experience in the management of mandibular condyle fractures. Method: The fractures were classified based on the age of the patient, unilateral/bilateral, location on the condyle, presence of displacement and dislocation, for those displaced, whether there was medial or lateral overlap, and features presented. Treatment done for each patient was documented. Both clinical and radiological assessments were done to ascertain the outcome of treatment. Result: 11 patients presented with 14 condyle fractures, 3 patients with bilateral and 8 with unilateral condyle fractures out of which 5 cases were on the right side. Age range of patients was between 13 and 44 years with a mean (SD) of 25.3 (10.7) years. Nine (81.8%) of the patients were males and 2 (18.2%) were females. Eight (72.7%) of the patients with condyle fracture had associated fractures affecting other sites of the mandible while 3 (27.3%) patients had isolated condyle fractures. Intracapusular fractures recorded were 2 (14.2%), while extracapsular accounted for 12 (85.8%) cases. Conservative treatment was not applied in any patient, 9 (81.8%) patients had IMF and 2 (18.2%) patients had ORIF. Conclusion: Most fractures of the condyle were extracapsular and, closed surgical treatment (IMF) was very useful to manage most of the cases.

关键词： Classification Management Condyle Fractures

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Genome-wide detection of selective signatures in a Jinhua pig population

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Journal of Integrative Agriculture 2020年第5期19卷 1314-1322页

作者： XU Zhong SUN Hao ZHANG Zhe Zhao Qing-bo babatunde Shittu Olasege Li Qiu-meng Yue Yang Ma Pei-pei Zhang Xiang-zhe Wang Qi-shan Pan Yu-chun Department of Animal Science School of Agriculture and BiologyShanghai Jiao Tong UniversityShanghai 200240P.R.China Shanghai Key Laboratory of Veterinary Bio-technology Shanghai 200240P.R.China

The aim of this study was to detect evidence for signatures of recent selection in the Jinhua pig *** results can be useful to better understand the regions under selection in Jinhua pigs and might shed some lights on groups of genes that control production *** the present study,we performed extended haplotype homozygosity(EHH)tests to identify significant core regions in 202 Jinhua pigs.A total of 26161 core regions spanning 636.42 Mb were identified,which occupied approximately 28%of the genome across all autosomes,and 1158 significant(P<0.01)core haplotypes were *** in these regions were related to several economically important traits,including meat quality,reproduction,immune responses and exterior traits.A panel of genes including ssc-mir-365-2,KDM8,RABEP2,GSG1L,RHEB,RPH3AL and a signal pathway of PI3K-Akt were detected with the most extreme *** findings in our study could draw a comparatively genome-wide map of selection signature in the pig genome,and also help to detect functional candidate genes under positive selection for further genetic and breeding research in Jinhua and other pigs.

关键词： pig genome selection signatures extended haplotype homozygosity(EHH) candidate genes

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Risk Assessment of Heavy Metals in Food Crops at Abandoned Lead-Zinc Mining Site at Tse-Faga, Logo, Lga, Benue State, Nigeria

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Journal of Environmental Protection 2021年第9期12卷 624-638页

作者： Paul N. Samuel Bolaji B. babatunde World Bank Africa Center of Excellence for Public Health and Toxicological Research (ACE-PUTOR) University of Port Harcourt Choba Port Harcourt Rivers State Nigeria Animal and Environmental Biology Department University of Port Harcourt Choba Port Harcourt Rivers State Nigeria

Hundreds of children died in 2010 due to suspected lead poisoning from mining sources in Zamfara State among epidemiological concerns. Evaluating ecological and human health risks of heavy metals levels in sampled food crops harvested near two abandoned Lead-Zinc mining sites at Logo Benue State is crucial. Abelmoschus esculentus, Carica papaya, Manihot esculenta, and Zea mays were sampled, prepared, and analyzed for four heavy metals using the Atomic Absorption Spectrophotometric method. The mean data from the analysis of variance was subjected to ecological and health risk models. Pb means value ranged from Carica papaya Peel 0.46 ± 0.011 mg/kg to 1.30 ± 0.01 mg/kg in Zea mays seed. Zn was highest in Carica papaya flesh 0.50 ± 0.01 mg/kg, and lowest in Manihot esculenta peels and its flesh 0.12 ± 0.000 mg/kg. Hg and Cd were below detectable levels. Zea mays seeds (1.001) had the highest Pd bioaccumulation factor. BAF of zinc and ecological indices were Manihot esculenta flesh 1.143 and Zea mays at 1714. Cancer Risks were within permissible range (10-4 - 10-6). Health Risk result indicates communities around the mining area may be at risk of lead poisoning therefore due to high contamination of samples, routine checks on heavy metals especially lead is recommended to prevent excessive bioaccumulation in the body.

关键词： Mining Food Crops Heavy Metals Ecological Risk Health Risks Lead Poisoning

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Mutational search for high temperature (60<sup>o</sup>C) tolerant variant of Rhizobium species CWP G34A—Mutation generates high temperature variant of Rhizobium species Cwp G34A

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Advances in Bioscience and Biotechnology 2011年第4期2卷 255-262页

作者： Bolatito Esther Boboye babatunde Ayodeji Ogundeji Helen Evbohoin Department of Microbiology Federal University of Technology P. M. B. 704 Akure Nigeria West Africa

This study focused on the development of thermophilic strain/s of a cowpea (Vigna unguiculata) compatible nitrogen fixing bacterium. A preliminary plant screening was carried out using some strains of tropical rhizobia and cowpea. Rhizobium species CWP G34A that formed Fix+ nodules repeatedly was selected for further studies. First, it was tested for growth at high temperatures of 40 to 55oC at 5oC interval with 28oC as the control temperature. Mutagenesis was conducted on the bacterium with ethylmethane sulphonate (EMS). The wildtype and mutants generated were tested for high temperature tolerance by growing them individually in nutrient broth at 60oC for 24 hours. Optical density (670 nm) was read before and after incubation. The mutants were grouped into classes based on percentage difference in OD values obtained before and after exposure to 60oC. Rhizobium species CWP G34A produced functional pink nodules on the cowpea consistently in three different plant tests. There was no growth at all the temperatures tested except at 28oC and 40oC after 24 hours of incubation. It grew better at former (51 × 1010 Cfu/ml) than latter (11 Cfu/ml) temperature. Like the parental strain, all the mutants but one, did not grow after exposure to 60oC. Sixty degree centigrade caused various reductions in optical density (OD) values of the variants. Eleven classes of the mutants were formed with membership percentage ranging from 1 to 22%. Class 1 contains only one member while class 11 has the highest mutant population of 22% with OD difference of 0 to 10% and –90 to –100% respectively. The high percentage reduction in the OD of variants in class 11 is similar to that of the unmutated cells (–94.56%). The only mutant that survived the 60oC and grew was MU70. An increase of 1.67% in OD was obtained for MU70. Mutant MU70 therefore appeared a promising strain that can be further tested to inoculate cowpea in the dry and warm season for increased nitrogen fixation. This will provide en

关键词： Mutation High Temperature Growth and Rhizobium Species CWP G34A

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