Pub Date : 2023-09-30DOI: 10.36108/ujees/3202.50.0210
A Adegoke-Elijah, K. Jimoh, A. Alabi
The development of the disambiguation component of a Yorùbá to English machine translation system is hindered by several factors. One of these is the lack of machine readable sense inventory for ambiguous Yorùbá words. This study addressed the problem by developing a machine readable dictionary for ambiguous Yoruba verbs. To achieve this, ambiguous Yorba verbs and their translations were collected from existing bilingual dictionaries. The collected lexicons were transformed into machine readable format using the Extensible Markup Language (XML) Format. The accuracy of translation of the machine readable dictionary was evaluated using mean opinion score, with a score of 4.37 over the scale of 5. This study covered the total number of ninety-three (93) monosyllabic verbs with two hundred and forty-one (241) senses, which gives a coverage of 69.5% of the ambiguous monosyllabic verbs in Yoruba Language. The sense inventory was also used as a component of a Yoruba Word Sense Disambiguation system, and an accuracy of 94.6% was achieved. This study concludes that the digitized data can increase the accuracy of Word Sense Disambiguation component of a Yorùbá to English machine translation system.
{"title":"Development of a XLM-Encoded Machine-Readable Dictionary for Yoruba Word Sense Disambiguation","authors":"A Adegoke-Elijah, K. Jimoh, A. Alabi","doi":"10.36108/ujees/3202.50.0210","DOIUrl":"https://doi.org/10.36108/ujees/3202.50.0210","url":null,"abstract":"The development of the disambiguation component of a Yorùbá to English machine translation system is hindered by several factors. One of these is the lack of machine readable sense inventory for ambiguous Yorùbá words. This study addressed the problem by developing a machine readable dictionary for ambiguous Yoruba verbs. To achieve this, ambiguous Yorba verbs and their translations were collected from existing bilingual dictionaries. The collected lexicons were transformed into machine readable format using the Extensible Markup Language (XML) Format. The accuracy of translation of the machine readable dictionary was evaluated using mean opinion score, with a score of 4.37 over the scale of 5. This study covered the total number of ninety-three (93) monosyllabic verbs with two hundred and forty-one (241) senses, which gives a coverage of 69.5% of the ambiguous monosyllabic verbs in Yoruba Language. The sense inventory was also used as a component of a Yoruba Word Sense Disambiguation system, and an accuracy of 94.6% was achieved. This study concludes that the digitized data can increase the accuracy of Word Sense Disambiguation component of a Yorùbá to English machine translation system.","PeriodicalId":23413,"journal":{"name":"UNIOSUN Journal of Engineering and Environmental Sciences","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135083465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-30DOI: 10.36108/ujees/3202.50.0240
U. Adamu, A. Ahmad, J. Mustapha, Y. M. Hashim, N. S. A. Yaro, S.A. Wada
At the outset of any project, every client’s primary goal is to attain value for their investment by securing a top-quality structure completed on schedule and within budget. Consequently, this study is devoted to the identification and prioritization of crucial risk factors that influence the choice of procurement methods in construction projects within the local government areas (LGA) of Nassarawa (NSR), Dala (DAL), and Kano Municipal (KMC) in Kano state. The methodology utilized entails surveying 146 participants, including both contractors and consultants. To assess the likelihood of these risks, the Relative Importance Index (RII) and the sign test were applied using Statistical Package for Social Science (SPSS) version 26. The results unveiled that factor associated with the client, project timeline, and cost exert the most profound influence on the choice of procurement method in the three LGA’s in Kano state. The most influential factors among these include the client’s financial capability, competition in pricing, constraints on project time, and procurement policies. In conclusion, a significant recommendation is for clients and consultants to enhance their procurement method oversight by involving skilled procurement specialists. This measure is essential for making informed choices, facilitating the attainment of a favourable return on investment, and guaranteeing the achievement of quality, timely, and budget-compliant project results.
{"title":"Vital Importance of Risk Assessment in Construction Project Procurement Method Selection","authors":"U. Adamu, A. Ahmad, J. Mustapha, Y. M. Hashim, N. S. A. Yaro, S.A. Wada","doi":"10.36108/ujees/3202.50.0240","DOIUrl":"https://doi.org/10.36108/ujees/3202.50.0240","url":null,"abstract":"At the outset of any project, every client’s primary goal is to attain value for their investment by securing a top-quality structure completed on schedule and within budget. Consequently, this study is devoted to the identification and prioritization of crucial risk factors that influence the choice of procurement methods in construction projects within the local government areas (LGA) of Nassarawa (NSR), Dala (DAL), and Kano Municipal (KMC) in Kano state. The methodology utilized entails surveying 146 participants, including both contractors and consultants. To assess the likelihood of these risks, the Relative Importance Index (RII) and the sign test were applied using Statistical Package for Social Science (SPSS) version 26. The results unveiled that factor associated with the client, project timeline, and cost exert the most profound influence on the choice of procurement method in the three LGA’s in Kano state. The most influential factors among these include the client’s financial capability, competition in pricing, constraints on project time, and procurement policies. In conclusion, a significant recommendation is for clients and consultants to enhance their procurement method oversight by involving skilled procurement specialists. This measure is essential for making informed choices, facilitating the attainment of a favourable return on investment, and guaranteeing the achievement of quality, timely, and budget-compliant project results.","PeriodicalId":23413,"journal":{"name":"UNIOSUN Journal of Engineering and Environmental Sciences","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135083468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The amount of waste disposed off globally has significantly increased due to increase in population and change in consumer habits. Million tons of organic waste are disposed of globally through incineration, land applications, landfill, and other methods. Selecting appropriate places for waste landfills is a challenging task for planners, especially in states with dense populations such as Osogbo due to land scarcity, land prices, and increased solid waste generation. Therefore, this study aimed to identify the optimal suitable areas for the solid waste landfill for proper waste management in the study area. In this work, a multi-criteria decision-making approach combining GIS and the Fuzzy Logic technique for landfill suitability site evaluation was used. Six factors are involved in the selection process namely soil, drainage, land use/land cover, built-up areas, road network, and slope. Using the weighted overlay analysis tool in the GIS environment, the results of the MCDM assigned to each criterion show that five potential sites in this study were suitable for the construction of a potential landfill, of which two are located in the most suitable zone and three are located in the unsuitable zone. It was concluded that the results presented on the final aggregation maps demonstrate the significance of selecting the appropriate criteria weights for the environmental and economic set of standards.
{"title":"The Use of GIS for Identifying Optimum Landfill Sites in Osogbo, Southwestern, Nigeria","authors":"N.B., Amoo, S.K. Aroge, O.A. Akintola, H.M.,, Olujide, I.A. Alabi, A.O. Amoo","doi":"10.36108/ujees/3202.50.0220","DOIUrl":"https://doi.org/10.36108/ujees/3202.50.0220","url":null,"abstract":"The amount of waste disposed off globally has significantly increased due to increase in population and change in consumer habits. Million tons of organic waste are disposed of globally through incineration, land applications, landfill, and other methods. Selecting appropriate places for waste landfills is a challenging task for planners, especially in states with dense populations such as Osogbo due to land scarcity, land prices, and increased solid waste generation. Therefore, this study aimed to identify the optimal suitable areas for the solid waste landfill for proper waste management in the study area. In this work, a multi-criteria decision-making approach combining GIS and the Fuzzy Logic technique for landfill suitability site evaluation was used. Six factors are involved in the selection process namely soil, drainage, land use/land cover, built-up areas, road network, and slope. Using the weighted overlay analysis tool in the GIS environment, the results of the MCDM assigned to each criterion show that five potential sites in this study were suitable for the construction of a potential landfill, of which two are located in the most suitable zone and three are located in the unsuitable zone. It was concluded that the results presented on the final aggregation maps demonstrate the significance of selecting the appropriate criteria weights for the environmental and economic set of standards.","PeriodicalId":23413,"journal":{"name":"UNIOSUN Journal of Engineering and Environmental Sciences","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135083454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-30DOI: 10.36108/ujees/3202.50.0250
A. Ahmad, A. Ahmed, S. O. Siyaka, N.S.A, Yaro, M. M. Musa, B. U. Aliyu
Risk factors are an inherent component of construction projects, and sometimes, it is difficult to completely eliminate these risks without proper management. This research focused on investigating cost-related risk indicators influencing the performance of construction projects in insurgency-affected areas such as Maiduguri. The assessment employed the Relative Importance Index (RII) and Exploratory Factor Analysis (EFA) to gauge the likelihood of these risks. Data was collected via a questionnaire from construction professionals, including clients, consultants, contractors, and subcontractors. The results analyzed through statistical software revealed that key drivers of cost-related risks were safety and environmental factors, physical threats, disasters, force majeure events, and economic risk factors. The top five most probable risks included costs related to insurgency damages, financial limitations due to insurgency, oversights caused by the insurgency, price increases due to attacks, and labour shortages. Conversely, risks related to cash flow issues and project cost estimation errors were less common. The findings suggest that professionals who consider these specific risk factors when devising risk management strategies can enhance the accuracy of their risk assessments and cost projections.
{"title":"Analyzing Cost Risk Indicators for Enhancing Construction Project Delivery Performance","authors":"A. Ahmad, A. Ahmed, S. O. Siyaka, N.S.A, Yaro, M. M. Musa, B. U. Aliyu","doi":"10.36108/ujees/3202.50.0250","DOIUrl":"https://doi.org/10.36108/ujees/3202.50.0250","url":null,"abstract":"Risk factors are an inherent component of construction projects, and sometimes, it is difficult to completely eliminate these risks without proper management. This research focused on investigating cost-related risk indicators influencing the performance of construction projects in insurgency-affected areas such as Maiduguri. The assessment employed the Relative Importance Index (RII) and Exploratory Factor Analysis (EFA) to gauge the likelihood of these risks. Data was collected via a questionnaire from construction professionals, including clients, consultants, contractors, and subcontractors. The results analyzed through statistical software revealed that key drivers of cost-related risks were safety and environmental factors, physical threats, disasters, force majeure events, and economic risk factors. The top five most probable risks included costs related to insurgency damages, financial limitations due to insurgency, oversights caused by the insurgency, price increases due to attacks, and labour shortages. Conversely, risks related to cash flow issues and project cost estimation errors were less common. The findings suggest that professionals who consider these specific risk factors when devising risk management strategies can enhance the accuracy of their risk assessments and cost projections.","PeriodicalId":23413,"journal":{"name":"UNIOSUN Journal of Engineering and Environmental Sciences","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135083466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-30DOI: 10.36108/ujees/3202.50.0230
S.A. Olaniyan, S. Yunus, O.O. Onigbogi
Tropical region is characterised by high outdoor solar radiation and temperature. These radiations penetrate into the interior particularly through the window glazing, thereby raising the indoor temperature with a resultant effect on high cooling energy demand (for comfortable indoor living condition). Of the identified three sustainable approaches towards inhibiting direct incoming indoor solar penetration in the tropical city of Ogbomoso, Nigeria, this study, through computer-based simulation technique, compared performance effectiveness of varying design interventions on the window composition/material adopted. Through multiple/iterative building performance simulation tool, DesignBuilder, the methodology involves virtual model of a three-bedroom residential building, typical of the prevailing building typology in the study area. This particular model served as the experimental control model. Three (3) variants of the control model, each with either externally mounted shading devices on the building envelope, or improved thermally resistant multilayer window glazing (i.e., double glazing) or low-emissivity coated window glazing material, were generated for individual performance effectiveness evaluation. All the four models were subjected to a twelve-month simulation cycle, to experience a year-round thermal conditions and evaluations individually. The results show that double-glazing window installation proved to be the most effective approach, with about 13.1 % improvement (i.e., solar radiation inhibition) on the indoor thermal gains. This is followed by the externally mounted shading devices (i.e., 11.1 % improvement) and the least inhibition (i.e., 5.0 %) was observed in the case of low-emissivity coated window glazing material. Adoption of double or more layers of glass panes in window fabrication for controlling indoor solar radiation penetration is therefore advised. Alternatively, integration of external window shading elements could be adopted. This study is directed towards reduction of cooling energy consumption in tropical buildings through efficient and sustainable indoor cooling mechanism capable of inhibiting solar gains into the building, with a focus on the performance roles and composition of windows in particular.
{"title":"Towards Sustainable Indoor Thermal Comfort in the Tropical Building Design: Comparative Performance Analysis of Fixed External Shading Elements and Differential Window Glass Thermal Properties","authors":"S.A. Olaniyan, S. Yunus, O.O. Onigbogi","doi":"10.36108/ujees/3202.50.0230","DOIUrl":"https://doi.org/10.36108/ujees/3202.50.0230","url":null,"abstract":"Tropical region is characterised by high outdoor solar radiation and temperature. These radiations penetrate into the interior particularly through the window glazing, thereby raising the indoor temperature with a resultant effect on high cooling energy demand (for comfortable indoor living condition). Of the identified three sustainable approaches towards inhibiting direct incoming indoor solar penetration in the tropical city of Ogbomoso, Nigeria, this study, through computer-based simulation technique, compared performance effectiveness of varying design interventions on the window composition/material adopted. Through multiple/iterative building performance simulation tool, DesignBuilder, the methodology involves virtual model of a three-bedroom residential building, typical of the prevailing building typology in the study area. This particular model served as the experimental control model. Three (3) variants of the control model, each with either externally mounted shading devices on the building envelope, or improved thermally resistant multilayer window glazing (i.e., double glazing) or low-emissivity coated window glazing material, were generated for individual performance effectiveness evaluation. All the four models were subjected to a twelve-month simulation cycle, to experience a year-round thermal conditions and evaluations individually. The results show that double-glazing window installation proved to be the most effective approach, with about 13.1 % improvement (i.e., solar radiation inhibition) on the indoor thermal gains. This is followed by the externally mounted shading devices (i.e., 11.1 % improvement) and the least inhibition (i.e., 5.0 %) was observed in the case of low-emissivity coated window glazing material. Adoption of double or more layers of glass panes in window fabrication for controlling indoor solar radiation penetration is therefore advised. Alternatively, integration of external window shading elements could be adopted. This study is directed towards reduction of cooling energy consumption in tropical buildings through efficient and sustainable indoor cooling mechanism capable of inhibiting solar gains into the building, with a focus on the performance roles and composition of windows in particular.","PeriodicalId":23413,"journal":{"name":"UNIOSUN Journal of Engineering and Environmental Sciences","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135083469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-15DOI: 10.36108/ujees/3202.50.0120
M. Esan, Y. Khairulzan, H. Zaiton, M. D. Gambo, H. Hassan
Gypsum is a common interior construction material, especially when used as a finishing element. However, interest in prospective uses of gypsum as a finishing component has diminished in recent years as a result of its weak mechanical strength and brittle character, which is essential in interior construction. Therefore, to overcome this challenge, the effect of pineapple leaf fiber on gypsum was investigated. Five different composite configurations of 2%, 3%, 5%, 10%, and 20% pineapple leaf fibre (PALF) with two PALF sizes of 5 mm and 15 mm were prepared and tested after 7 and 28 days of curing. The results of the tests show that materials reinforced with 2% PALF have significantly improved mechanical properties. The compressive strength of a gypsum composite increased by 12.4% when 2% PALF was added. Flexural strength increased by 59% when 2% PALF was added to the mixture. The study provided a means of making gypsum composites having greater mechanical strength than those made from fossil oil-based polymers. It also found relevant use of pineapple leaf, an agricultural waste.
{"title":"Effect of Pineapple Leaf Fiber on the Physico-mechanical Properties of Gypsum Board","authors":"M. Esan, Y. Khairulzan, H. Zaiton, M. D. Gambo, H. Hassan","doi":"10.36108/ujees/3202.50.0120","DOIUrl":"https://doi.org/10.36108/ujees/3202.50.0120","url":null,"abstract":"Gypsum is a common interior construction material, especially when used as a finishing element. However, interest in prospective uses of gypsum as a finishing component has diminished in recent years as a result of its weak mechanical strength and brittle character, which is essential in interior construction. Therefore, to overcome this challenge, the effect of pineapple leaf fiber on gypsum was investigated. Five different composite configurations of 2%, 3%, 5%, 10%, and 20% pineapple leaf fibre (PALF) with two PALF sizes of 5 mm and 15 mm were prepared and tested after 7 and 28 days of curing. The results of the tests show that materials reinforced with 2% PALF have significantly improved mechanical properties. The compressive strength of a gypsum composite increased by 12.4% when 2% PALF was added. Flexural strength increased by 59% when 2% PALF was added to the mixture. The study provided a means of making gypsum composites having greater mechanical strength than those made from fossil oil-based polymers. It also found relevant use of pineapple leaf, an agricultural waste.","PeriodicalId":23413,"journal":{"name":"UNIOSUN Journal of Engineering and Environmental Sciences","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91275625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-15DOI: 10.36108/ujees/3202.50.0150
K. Oyewole, S. Oyelami, W. Adedeji, R. Adegboye, I.C. Adebanjo
Public health is at risk due to pollution from activity in car workshops as the quality of the soil near auto businesses has received less attention. This study assessed soil quality in auto shops in Osogbo, Osun State, South-West Nigeria. Two car workshops were chosen and soil samples were collected from two different points each using a random survey method (i.e., picked two sites randomly). The soil samples were collected at irregular positions within the vicinity of the two auto repair shops at 0–20 cm and 20–40 cm depth. The samples were taken for examination of polychlorinated biphenyls (PCBs) and (Polycyclic aromatic hydrocarbons) PAHs. The samples were analysed in the lab according to regular technique, and 16 US EPA priority PAHs and PCBs were then examined using a gas chromatography-mass spectrometer (GC-MS). The potential toxicities were evaluated and values obtained were compared with United States permissible limits for soil quality. The total PAH values in the soil were between 0.17 μg/m3 to 4.97 μg/m3, with the soil samples near the truck maintenance shops having the greatest PAH concentrations between 0 – 20 cm below the surface. The most prevalent PAH species in soil samples was Fluoranthene, followed by Fluorene and Indeno [1,2,3-cd] pyrene. Also, PCBs were found in the location with 1,1′-Biphenyl, 2,2′,3,4,4′,5′-hexachloro- (PCB 138) having the highest concentration value followed by 1,1′-Biphenyl, 3,3′,4,4′-tetrachloro- (PCB 77). The findings of this study showed that both of these pollutants investigated are very prevalent in these areas. There is a grave environmental concern because the discovered levels of PCBs and PAHs exceed the permissible limits set by the USEPA standards.
{"title":"Investigation of some Persistent Organic Pollutants in Soil around selected Auto-Mechanic Workshops in Osogbo","authors":"K. Oyewole, S. Oyelami, W. Adedeji, R. Adegboye, I.C. Adebanjo","doi":"10.36108/ujees/3202.50.0150","DOIUrl":"https://doi.org/10.36108/ujees/3202.50.0150","url":null,"abstract":"Public health is at risk due to pollution from activity in car workshops as the quality of the soil near auto businesses has received less attention. This study assessed soil quality in auto shops in Osogbo, Osun State, South-West Nigeria. Two car workshops were chosen and soil samples were collected from two different points each using a random survey method (i.e., picked two sites randomly). The soil samples were collected at irregular positions within the vicinity of the two auto repair shops at 0–20 cm and 20–40 cm depth. The samples were taken for examination of polychlorinated biphenyls (PCBs) and (Polycyclic aromatic hydrocarbons) PAHs. The samples were analysed in the lab according to regular technique, and 16 US EPA priority PAHs and PCBs were then examined using a gas chromatography-mass spectrometer (GC-MS). The potential toxicities were evaluated and values obtained were compared with United States permissible limits for soil quality. The total PAH values in the soil were between 0.17 μg/m3 to 4.97 μg/m3, with the soil samples near the truck maintenance shops having the greatest PAH concentrations between 0 – 20 cm below the surface. The most prevalent PAH species in soil samples was Fluoranthene, followed by Fluorene and Indeno [1,2,3-cd] pyrene. Also, PCBs were found in the location with 1,1′-Biphenyl, 2,2′,3,4,4′,5′-hexachloro- (PCB 138) having the highest concentration value followed by 1,1′-Biphenyl, 3,3′,4,4′-tetrachloro- (PCB 77). The findings of this study showed that both of these pollutants investigated are very prevalent in these areas. There is a grave environmental concern because the discovered levels of PCBs and PAHs exceed the permissible limits set by the USEPA standards.","PeriodicalId":23413,"journal":{"name":"UNIOSUN Journal of Engineering and Environmental Sciences","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73846775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-15DOI: 10.36108/ujees/3202.50.0180
M. Kolawole, A. O. Popoola, K. Odeyemi, K. Bashiru
The epidemic model of typhoid is considered to be a control strategy for the undeviating transference of infectious disease. Due to its high accuracy and efficiency in solving nonlinear differential equations, the homotopy perturbation method is coupled with the Riemann-Liouville fractional integral operator I of order n E (0,1) to obtain the approximate analytical solution of the epidemiology model presented at different level of n. The obtained results were subjected to simulation process where the effect of the causative bacterial in the medium was studied at various level of n . The entirety of the computational procedures was conducted utilizing Maple 18, and graphical representations and tabular data were exhibited to facilitate a lucid understanding of the simulation outcomes. These findings indicate that curtailing Salmonella contamination is of paramount importance for minimizing the hazard of sickness and infection. This can be achieved through the observance of meticulous hygiene, which includes consistent hand washing with soap and water, thorough cooking of food, and appropriate storage and handling of edibles.
{"title":"An Approximate Solution of Fractional Order Epidemic Model of Typhoid using the Homotopy Perturbation Method","authors":"M. Kolawole, A. O. Popoola, K. Odeyemi, K. Bashiru","doi":"10.36108/ujees/3202.50.0180","DOIUrl":"https://doi.org/10.36108/ujees/3202.50.0180","url":null,"abstract":"The epidemic model of typhoid is considered to be a control strategy for the undeviating transference of infectious disease. Due to its high accuracy and efficiency in solving nonlinear differential equations, the homotopy perturbation method is coupled with the Riemann-Liouville fractional integral operator I of order n E (0,1) to obtain the approximate analytical solution of the epidemiology model presented at different level of n. The obtained results were subjected to simulation process where the effect of the causative bacterial in the medium was studied at various level of n . The entirety of the computational procedures was conducted utilizing Maple 18, and graphical representations and tabular data were exhibited to facilitate a lucid understanding of the simulation outcomes. These findings indicate that curtailing Salmonella contamination is of paramount importance for minimizing the hazard of sickness and infection. This can be achieved through the observance of meticulous hygiene, which includes consistent hand washing with soap and water, thorough cooking of food, and appropriate storage and handling of edibles.","PeriodicalId":23413,"journal":{"name":"UNIOSUN Journal of Engineering and Environmental Sciences","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79667460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-15DOI: 10.36108/ujees/3202.50.0190
A. Owa, F. Adesina, O. R. Bodede, A. Adebayo, M. Olupona, T. Elijah, O. Kolade
Thermal properties and chemical performance of newly developed Thevetia peruviana oil-based (TPO) bio-composites with short sisal fibers reinforcement were studied in this research, with the aim of producing materials derived from renewable resources for engineering applications. Three sets of TPO composites (5C, 10C and 15C) reinforced with sisal fibers 5, 10 and 15 wt% respectively were produced by compression moulding method. Thermographic analyser (TGA) was used to determine the thermal behavior of the new composites and the results showed that the composites thermal stability behavior increase with fiber loading. 5% degradation temperature (T5) and 10% degradation temperature (T10) of the new composites increased from 300 to 312 0C and from 338 to 419 0C, respectively. The char value of 8.264 of the unreinforced resin reduced on the addition of 5 wt% of fiber while there were enhancements in the char values of composites reinforced with 10 wt% and 15 wt% fiber. The chemical resistance and water absorption tests showed that the percentage gain/loss of the composites in all the reagents are negligible, with composite 5C showing superior resistance in all the media. The results showed that the newly produced bio-composites is a potential material for storage vessels production.
{"title":"Thermal and Chemical Performance Evaluation of Thevetia peruviana Oil-Based Composites Reinforced with Short Sisal Fibers","authors":"A. Owa, F. Adesina, O. R. Bodede, A. Adebayo, M. Olupona, T. Elijah, O. Kolade","doi":"10.36108/ujees/3202.50.0190","DOIUrl":"https://doi.org/10.36108/ujees/3202.50.0190","url":null,"abstract":"Thermal properties and chemical performance of newly developed Thevetia peruviana oil-based (TPO) bio-composites with short sisal fibers reinforcement were studied in this research, with the aim of producing materials derived from renewable resources for engineering applications. Three sets of TPO composites (5C, 10C and 15C) reinforced with sisal fibers 5, 10 and 15 wt% respectively were produced by compression moulding method. Thermographic analyser (TGA) was used to determine the thermal behavior of the new composites and the results showed that the composites thermal stability behavior increase with fiber loading. 5% degradation temperature (T5) and 10% degradation temperature (T10) of the new composites increased from 300 to 312 0C and from 338 to 419 0C, respectively. The char value of 8.264 of the unreinforced resin reduced on the addition of 5 wt% of fiber while there were enhancements in the char values of composites reinforced with 10 wt% and 15 wt% fiber. The chemical resistance and water absorption tests showed that the percentage gain/loss of the composites in all the reagents are negligible, with composite 5C showing superior resistance in all the media. The results showed that the newly produced bio-composites is a potential material for storage vessels production.","PeriodicalId":23413,"journal":{"name":"UNIOSUN Journal of Engineering and Environmental Sciences","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72596944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-15DOI: 10.36108/ujees/3202.50.0170
Olakunle Olukayode, K. Alawode, T. O. Ajewole, W. Adedeji
A robotic manipulator consists of a robotic arm and an end-effector. The function of the end-effector or robotic gripper is to allow the robotic arm to grasp and manipulate objects. The traditional hard robotic grippers are prone to poor gripping ability when grasping objects with irregular shape or in-ability to passively adjust force to delicate objects. Soft Robotic grippers were purposely designed to solve these disadvantages. In this work, a novel light weight robotic gripper based on grasping action of holding an object in between two strips of in-elastic flexible material under tensile force developed when pulled is hereby presented. Force analysis of the gripper was carried out as well as validation experiments. Analysis shows that the minimum pulling force to be exerted by the gripper on the grasping strips is directly proportional to the payload mass and the strips lengths. It is also inversely proportional to the coefficient of static friction between the payload-strips interface and the horizontal extent of the payload. Experimental results supported these observations. Moreover the predicted analytical values of gripper pulling force agreed reasonably with the empirically derived values. A proof of concept model of the gripper successfully grasps a 185g object.
{"title":"Design and analysis of a novel light-weight, linear actuator driven flexible PET strips robotic gripper","authors":"Olakunle Olukayode, K. Alawode, T. O. Ajewole, W. Adedeji","doi":"10.36108/ujees/3202.50.0170","DOIUrl":"https://doi.org/10.36108/ujees/3202.50.0170","url":null,"abstract":"A robotic manipulator consists of a robotic arm and an end-effector. The function of the end-effector or robotic gripper is to allow the robotic arm to grasp and manipulate objects. The traditional hard robotic grippers are prone to poor gripping ability when grasping objects with irregular shape or in-ability to passively adjust force to delicate objects. Soft Robotic grippers were purposely designed to solve these disadvantages. In this work, a novel light weight robotic gripper based on grasping action of holding an object in between two strips of in-elastic flexible material under tensile force developed when pulled is hereby presented. Force analysis of the gripper was carried out as well as validation experiments. Analysis shows that the minimum pulling force to be exerted by the gripper on the grasping strips is directly proportional to the payload mass and the strips lengths. It is also inversely proportional to the coefficient of static friction between the payload-strips interface and the horizontal extent of the payload. Experimental results supported these observations. Moreover the predicted analytical values of gripper pulling force agreed reasonably with the empirically derived values. A proof of concept model of the gripper successfully grasps a 185g object.","PeriodicalId":23413,"journal":{"name":"UNIOSUN Journal of Engineering and Environmental Sciences","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78824210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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