FACULTY OF TECHNOLOGY
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Item Traffic flow rate on Kigali roads: a case of national roads (RN1 and RN3)(Department of Civil Engineering, University of Ibadan, Ibadan, Nigeria, 0201-06) Nyirajana, J.; Akintayo, F. O.; |Coker, A. O.Traffic flow study plays a key important in various functionalities of cities all over the world. The study of traffic flow is also viewed as an essential facility of the country when it wants to establish traffic operations patterns in the progress of road planning. Blockages are accountable for a sequence of harmful effects such as loss of time, scheduling difficulties, carbon dioxide production, and risks of accidents as well as external expense. Besides, inadequate transportation facilities and increased traffic volume hamper urban development, especially in developing nations. The objective of the study was to assess the traffic flow state in two selected national roads of Kigali city. The traffic data were collected from 5 am to 8 pm on two National Roads (RN1 and RN3). The relationship between density and flow rate was analyzed using the fundamental diagram of traffic flow. It was found that the peak hours were from 6 am to 8 am and 5 pm to 8 pm. The highest number of vehicles counted were motorcycles due to shortcuts taken to reduce travel time. The results on RN3 revealed a proportion increase of traffic flow and density in the free-flow regime from 0 to maximum flow of 3346.6 veh/h correspondent to a critical density of 229.9 veh/km. However, in the congested zone regime, there was a decrease in traffic flow and an increase in density. It was found that the curve of flow versus density tended to increase on-road RN1. This study proposed the promotion of public transport and e-commerce as strategies to mitigate the congestion. Also, further research may be carried out on all roads of Kigali city, to provide the level of congestion useful for traffic deviation accordingly.Item Heuristic approach to course scheduling in a resource-constrained environment(University of Nairobi, 2009-06) Akintayo, F. O.; Oluleye, A. E.This paper describes a simple heuristic for course scheduling in a resource-constrained environment.Item Quality characteristics of basic hand tools soid in Nigeria(Trans Tech Publications, Switzerland, 2009) Oyawale, F. A.; Ogunmolati, M. A.Hand tools sold in Nigeria have become increasingly: unreliable; dud to critical failures during use. The objective of this study is to test samples of these tools vis-a-vis manufacturer’s claims. A total of fifteen (15) hand tools from six (6) different countries available on the Nigerian market were tested for their quality characteristics. The tested tools included spanners, hammers, screwdrivers, pliers and chisels. Three samples of each of the groups of hand tools were ranked in accordance to their impact energy which is a major property-of percussion tools. The results showed that built-in mechanical properties of these hand tools were largely controlled by their alloying elements, manufacturing processes and heat-treatment. Five (5) of the fifteen (15) selected hand tools conformed to BS 876, 1981 and were adjudged safe and reliable.Item Studies on the effect of cocoa pod as filler in polyester composites(2008) Bolarinwa, M. A.; Babatope, B.This work investigates the effects of surface treatment on cocoa pod on the mechanical properties of polyester composites. Reinforcement varying between 0% w/w to 10% was used in the preparation of the polyester composite specimens. Tensile and hardness tests were carried out on the test specimens with and without reinforcements and the effect of loading on the mechanical properties were correlated. This work has a significant impact for the conversion of waste products, especially cocoa pod that pollutes the environment to engineering materials. The study found that apart from the common use of cocoa pod in the soap making industry, it would also become important in engineering materials fabrication. This has implication for the wealth creation programme embedded in the vision 20, 2020 target on the floor.Item Influence of fiber characteristics of Nigérian grown Bambusa vulgaris Schrad on its relative density and burst strength(Department of Agricultural and Environmental Engineering. University oflbadan, Nigeria, 2008) ogedengbe K.Strength properties of Bambusa vulgaris with increasing culm height was studied considering its fiber characteristics with particular reference to the presence or absence of nodes. At the interaode. an increase in fiber length with increasing culm height (2.78 mm-3.73 mm from base to lop) was observed, while fiber diameter behaved conversely, showing a reduction from base to top (0.033 mm-0.013 mm). Relative density and burst strength had a similar trend as they both showed reduction in values from base to top (0.62-0.31 and 8.2KN/mmJ - 5.3KN/mnr respectively). At the node, reduction in fiber length from base to top (1.79 mm 1.39 mm) was ohserved. while fiber diameter increased from base to top (0.023 mm-0.031mm). Relative density showed a reduction from base to lop (0.64-0.32). while burst strength had a similar trend having a range of above 1 IKN/mm5-5.4KN/mmJ from base to top Statistical analysis of the data from the node revealed a strong direct correlation between fiber length and relative density, while fiber diameter showed a weak and inverse relationship. Burst strength showed a direct but weak relationship with fiber length, while it had an inverse and weak correlation with fiber diameter. At the intemode. a weak and inverse relationship was revealed between density and fiber length, while fiber diameter showed a direct but weak relationship. Burst strength and fiber length showed a strong but inverse correlation, while fiher diameter and burst strength revealed a direct and significant correlation.Item Trends in fiber characteristics of Nigerian grown bamboo and its effect on its impact and tensile strengths(Department of Agricultural and Environmental Engineering, University of Ibadan, Nigeria, 2008) Omobowale M.O.Variations in impact bending and tensile strengths of Bambusa vulgaris (Schrad) with increasing culm height were studied considering its fiber characteristics at the nodes and internodes along the length of the culm. At the nodes, statistical analysis revealed a weak but direct correlation between fiber length and tensile strength while fiber diameter had a strong but inverse relationship with it. Impact bending showed a direct but weak relationship with fiber length while it had an inverse and weak correlation with fiber diameter. For the internodes, a st-'^gn inverse relationship was established between fiber length and tensile strength while fiber diameter showed a direct but weak relationship. Impact bending and fiber length had a strong but inverse correlation while fiber length and impact bending revealed a direct and significant correlation.Item Primary wood conversion and processing in nigeria : a status report.(1999) Olorunnisola A.O; Omoniyi T.EItem Solid waste management in south western Nigeria(2004) AGBEDE O.A.; AJAGBE W.O.This study researches into solid waste management in South-West Nigeria in relation to pollution control using a an North as a case study. The generation pattern storage, collection and transportation, and the final disposal of solid waste ocean government are all discussed. Data used for this study were collected by the use of structured questionnaires and oral interviews. Analysis of the data revealed that all the functional elements of solid waste management system in the local government and the city of lbadan in general as practiced by existing institution - Ibadan Solid Waste Management Authority, are engulfed with fundamental problems which apparently have been the reason why institutions are unsuccessful in the efficient management of solid waste and control of environmental pollution. The various problems are identified, analyzed and discussed, pragmatic means of solving the problems, such as the encouragement of waste recycling; the active provisionItem Causes And Prevention Of Erosion In Urban Centres: A Case Of Okeotunu/Sanngo Area Of Ibadan City, Nigeria(2004) Agbede O.A.; W. O. Ajagbe W.OThe causes of erosion in the study area, Okeitunu/ Sanngo, were investigated via the geology and soil properties of the area, the state of the existing road network and the drainage system, and the solid waste management practice in the local government area. It was revealed that both natural and man made activities contributed to the erosion of the area. Topographical nature of Okeitunu and the inadequate stream channel, in addition to bad environmental sanitation practices, unchecked vegetative removal and lack of enlightenment on the part of the inhabitants on erosion problems are the key factors causing the degradation of the Okeitunu environment. Stabilization of the steep slope, rehabilitation of the existing bare roads and damaged drainage will abate the wearing away of the soil. In addition, the populace needs to be enlightened to know what it takes to initiate or aggravate erosion.Item Icast 2007 Advancement through technology & education(INTERNATIONAL CONFERENCE, 2007) Mijinyawa .YThe moduli of elasticity and rupture, and the energy to cause failure under impact load of oil palm truck were determined. Samples for testing were obtained from the base, middle and top of the tree truck. They were taken from both the core and outer region of the truck and tested wet and dry conditions. the samples obtained from the outer layer of the base and tested under wet and dry conditions, gave the highest modulus of elasticity of 4943 N/mm and a modulus of ruture of 42.8 N/mm. The samples obtained from the inner section of the top and tested under wet condition gave the lowest values of 369.7 N/mm for modulusof elasticity and 0.4 N/mm for modulus of rupture. The maximum value of energy consumption of 12.86 joules was recorded for the samples from the inner portion of the top and tested under dry condition. There was a general decrease from the base to the top for the three parameters and from inside to the outer section.