FUOYE Journal of Engineering and Technology (FUOYEJET - Federal University Oye-Ekiti)
Not a member yet
287 research outputs found
Sort by
Electricity Cost Aware Virtual Machine Placement Schemes in Distributed Cloud
Get PDFIn recent times, energy efficiency has become an important criterion considered by information and communication technology (ICT) infrastructure providers. This is largely motivated by economic and environmental reasons. By leveraging on technological advancements, it is possible to accomplish desired energy efficiencyimprovementsin the ICT industry. This paper leverages on the virtualization concept (behind the success of cloud computing) and time of usage concept (enabled by smart grid technology) to reduce non-renewable power consumption and total electricity cost of cloud and network infrastructure providers. A mixed integer linear programming (MILP) model was developed to study the impact of varying electricity prices across time zones on the placement of virtual machine (VM) clusters in distributed clouds connected via internet protocol over wavelength division multiplexing (IP over WDM) core network. Results showed that VMclusters are placed at nodes with the cheapest electricity for the three VM cluster placement schemes considered. These results are achieved at the expense of increased non-renewable power consumption and electricity cost in the IP over WDM core network
Morphology and Optimisation of Impact Energy of Weldment of High Strength Low Alloy Steel
No full textMorphology and optimisation of impact energy of weldment of low alloy-high strength steel were investigated in this work. The study involved the use of design of experiment via Taguchi method based on three variables, each having three levels. Minitab 16 software was used for the analysis of variance (ANOVA) and signal to noise (S/N) ratio of the impact energy. Direct current electrode positive (DCEP) was used in the electric manual metal arc (MMA) welding. The input parameters at the three levels were current (60 A, 70 A, and 80 A), metal thickness (5 mm, 7 mm, 9 mm) and root gap (2.0 mm, 2.5 mm, 3.0 mm). It was found that the input variables significantly affected the microstructure of the weldment in all the nine experiments conducted. Optimization of welding parameters was carried out to obtain the optimal input values required to give the optimal impact energy of weldment. The optimal values for the input values were 80 A for current, 9 mm thickness and 2.5 mm root gap and these were substituted in the regression equation to obtain the optimal impact energy. It was equally observed that the input variables affected the microstructure of each of the nine samples
A Review of the Major Problem Soils in Nigeria
Get PDFThis paper intends to produce a compendium of geotechnical properties of major problem soils of Nigeria which have critical influence on the design, performance, lifespan, construction cost and maintenance of civil engineering structures. Apart from the well researched lateritic soils of Nigeria, the black cotton soils (BCS) of north-eastern Nigeria, clay shale of north-western Nigeria, organic clay prominent in Lagos and soft sedimentary deposits of the Niger-Delta areas of Nigeria are also considered. Significant geotechnical properties of major problem soils in Nigeria were discovered to be scattered in different publications, magazines, journals, conference proceedings, research papers etc. Consequently, it is the aim of this paper to collate, correlate, analyze and digitize these important geotechnical properties on digital map of Nigeria. A Geographic Information System (GIS) mapping software called ArcGIS will be used to generate isopleths in form of contours for these soil properties on map of Nigeria
The Impact of Cassava Wastewater from Starch Processing Industry on Surrounding Soil: A Case Study of Matna Foods Industry, Ogbese
Get PDFThis study is aimed at determining the impacts of indiscriminate disposal of processed cassava wastewater into the environment by determining the physicochemical characteristics of the wastewater and soil characteristics within the vicinity of starch processing industry.The cassava wastewaterquality wastested in accordance with the standard methods for the examination of water and wastewater while soil samples was analysed using Atomic Absorption Spectrometer. The result of cassava wastewatershows that the effluent is acidic with pH of 3.8 and high conductivity of 6500µΩ. The cyanide content is also very high with 0.17mg/l as compared to 0.05mg/l recommended by WHO. The total solid, total dissolved solid and total suspended solid are also in high range of 20619, 17048 and 3571 mg/l respectively. Its hardness is 812mg/l, chloride 2516mg/l and nitrate 470mg/l. The dissolved oxygen was not detected while COD and BOD were also on the high side with values of 560 and 1410mg/l respectively. The results of soil analysis indicates that the cyanide concentration is high at the surface but reduces with depth. The pH is also in acidic range. However, Magnesium, Sodium, Sulphate, Zinc, Chromium, Vanadium, Europium and Rubidium were not detected in the soil samples. The percentage of calcium, potassium, copper, manganese and titanium were small and varying between 0.07 and 6.37ppm. Three unlined aerobic ponds provided for the treatment of cassava wastewater reduces the pollution strength of the wastewater but the untreated wastewater interfere with the surrounding soil during conveyance to the pond as well as pond environment.It is recommended that the wastewater conveyance and ponds should be well designed to prevent interference with the surrounding soil
Computer Aided Grain Aeration Management: an Antidote to Grain Deterioration in Metal Silo
Get PDFAeration is very important for good grain storage as it helps to maintain uniform grain temperatures, minimizes moisture migration, and prevents quality loss of stored grain. The temperature of grain stock was monitored with the aid of temperature sensors installed inside the silo bins. Each silo contained twenty sensors located on five probes at different sections of the silo bin. Grain was received to experimented metal silos at 300C. The parameters for grain before reception were 1% broken grain, 1% mould, 1% foreign matters, 68- 75KG/HL weight and 12% moisture content. Grain temperature rose to 450C within three weeks of storage. Temperature readings were taken in the morning and at evening times. Aeration system (fans) was operated several times, each time for long hours (≥5hours) enough to equalize temperature throughout the entire grain mass. Aeration fans were used to rapidly cool grain to 250C and then held it between 25 - 410C for over a year. The power requirement increased as air flow rate and grain depth increased. Aeration fans were controlled automatically from the operating control room while dehumidifiers were installed on the aeration fans. Loss recorded at manually operated metal silo was compared with the one from the silo monitored with computer software developed. While aeration could be used to lower grain temperature, minor changes took place on the moisture content of the grain mass. Loss was reduced to < 1% as against 5%. Aeration can be better monitored economically with the use of a computer system
Geophysical and Geotechnical Investigation for Post Foundation Studies, Faculty of Social Sciences and Humanities, Federal University Oye Ekiti
Get PDFA combined geophysical methods involving very low frequency-electromagnetic, electrical resistivity, magnetics prospecting method and geotechnical investigations were used in delineating the causes of cracks on the buildings of Faculty of Social Science and Humanities, Federal University Oye- Ekiti. Five (5) Very Low Frequency-Electromagnetic traverses, Twenty-one (21) Vertical Electrical Soundings and three (3) magnetic profiles were occupied and investigated around the distress building. Two (2) locations were also occupied for geotechnical investigations. Three major layers were delineated in the study area which includes the topsoil, weathered/fractured layer and fresh basement. The VES curve types obtained were A, H, K and Q curves. The buildings were found to be situated within the area of a fairly high concentration of fractures that can aid subsidence in the area and relatively low resistivity zones typical of incompetent clay formation. The geotechnical results also show that the soil has relatively high clay content. Based on the consistency limits. The soils within the area is classified as medium plasticity, hence, the soils are expected to exhibit medium swelling potential. It can however be concluded that the subsoils on or within which buildings are founded within the study area are not competent. From the result, the building failure observe as cracks and foundation subsidence may have been caused by the foundation soils that made up of incompetent materials (clay) which could compress on imposing loads by differential settlement. It is noteworthy that geological features such as fractures/faults delineated within the bedrock is also inimical to the building foundation
Approaches to Machine Translation: A Review
Get PDFTranslation is the transfer of the meaning of a text from one language to another. It is a means of sharing information across languages and therefore essential for addressing information inequalities. The work of translation was originally carried out by human translators and its limitations led to the development of machine translators. Machine Translation is a subfield of computational linguistics that investigates the use of computer software to translate text or speech from one natural language to another. There are different approaches to machine translation. This paper reviews the two major approaches (single vs. hybrid) to machine translation and provides critique of existing machine translation systems with their merits and demerits. Several application areas of machine translation and various methods used in evaluating them were also discussed. Our conclusion from the reviewed literatures is that a single approach to machine translation fails to achieve satisfactory performance resulting in lower quality and fluency of the output. On the other hand, a hybrid approach combines the strength of two or more approaches to improve the overall quality and fluency of the translation