ABSTRACT In this paper a forward difference operator method was used to solve a set of difference equations. We also find the particular solution of the nonhomogeneous difference equations with constant coefficients. In this case, a new operator call the forward difference operator ∆r,s, defined as ∆r,s yn = r yn+1 - s yn, was introduced. Some of the properties of this new operator were also investigated.
ABSTRACT Some welded structures show poor mechanical properties at the weld and the adjacent zones. This has led to the collapse of structures when subjected to various torques. This research investigates the grain structure of the fusion zone of a single pass arc welding of structural steel to identify the mode of growth and grain transition of the zone and adjacent weld. Two parameters – temperature gradient in the direction of solidification and rate of advance of solidification were stu...
ABSTRACT All over the world, there is an increasing enrolment level for university admissions in view of the ever-increasing benefits of eaming university degrees. Thus, the high population of students in many universities, coupled with a high number of vehicles has made traffic control a challenge to University traffic managers. In this paper, the method of Resca1e Range Analysis (RRA) was used to estimate the Hurst Exponent Value (HEV) for the traffic inflow through the main entrance gate o...
Abstract: The maintenance profitability problem is an important but emerging . concept of maintenance performance measurement that views the maintenance function as a value adding subsection of the organisation. The service provided by the maintenance system to production is charged as a price, which results in the monetary contribution of the maintenance department to the organisation. In the same way. as production would add financial benefits to the organisation the maintenance system is p...
Abstract: Micro-alloyed steels produced by controlled rolling are of the most attractive propositions in many engineering applications because of their relative low cost, moderate strength and very good toughness when compared with as-castalloy steel.. This research work has shownthe possible substitution of cheaper, low-alloy steel for the high alloy steel for the same application. The effect of HTMT onthe mechanical properties of low alloy steel was investigated.
Abstract: Fruit trees am hardly ever sought for their wood until recently. Fruit trees like C. alhidum is now being used for structural and non structural purposes in city suburbs, This study investigated wood properties and few tree chplracteristies of C. albidum grown in AkinyeIe Local Government h (ALGA), Ibadaa, Oyo State, Nirk The dm was to mitigate, the dearth of information on these &atut.cs in elation to its utitdon. Samples %re collected from five emerging settl&ents in the; study ar...
ABSTRACT The research work provides the basic information for the desrgn of a Central Air-Conditioning system for Kenneth Dike Library extension, U.niversity of Ibadan, Oyo Stake used as a case study. The software was designed, using a visual basic 6.0 (C++) programming language, to perform a thermal analysis for all the rooms of the floors in the building. The developed software called AIRCCAD is implemented to handb mathematical equations and engineering calculations efficiently and effecti...
ABSTRACT A survey of, the mycoflora of three seed lots of Pinus caribaea var. hondurensis was carried out using the incubation tests for the detection of seed-borne fungi on agricultural seeds. The seed-borne fungi identified were: t Acromonium sp., Aspergillus flatus, fumigatus,! A. niger, A. tamarii, Botrvtis sp., BotryQdiplQd.i.a theobromae, Chaetomium funicola, £. globosum, £. indiCUTO, Cladosporium oxvsporum, Pendrophpma sp., Fysa.riym ecruiseti, F. moniliforme var. intermedium, Gii-pc...
ABSTRACT The dearth and cost of energy supply in Nigeria calls for planning and management through energy audit. The object of this paper is to carry out a comprehensive energy audit of the two commercial buildings commonly referred to as Energy House and Mirror House which are the head offices of the Global Fleet Oil & Gas Ltd. Company and National Mirror Newspaper respectively, using their 2011 energy consumption data. The power supplies to both offices are from the same generators which pr...
ABSTRACT Control of the storage pest Larger Grain Borer (LGB) (Prostephanus truncates) and aflatoxin contamination by the mould Aspergillus spp. are the major challenges to maize storage in Africa. In this study, the effect of hermetic storage on LGB and Aspergillus spp. during maize storage was evaluated. A 2 x 3 factorial experiment of two storage atmospheres (hermetic and non-hermetic) and infestation levels (LGB, Aspergillus spp. and uninfected control) were evaluated during the storage...
ABSTRACT Machine shop workers are exposed to noise levels between 83 - 110 dB(A), however, levels above 85 dB (A) are hazardous to the ear. A study was conducted at GRATIS Foundation in Tema Industrail Area in Ghana, using sound level meters to determine noise levels and propose solutions. Sound levels during peak hours of operation in the machine shop were found to be above 95 dB(A). To reduce these high noise levels, Coconut Fibre (CF) a naturally occurring sound absorber, was combined with...
ABSTRACT Vegetable crop production in Ghana over the past years has been a challenge due to water scarcity. The unpredictable and insufficient rainfalls has been a drawback on improving crop production and yield. This study aimed at estimating crop water requirement (CWR) and yield of okra in biochar amended soil. The FAO 56 dual crop coefficient approach was used to estimate CWR of a local variety of the test crop, okra (Abelmoschus esculentus L.). Models were developed to predict crop coeff...
ABSTRACT Power line fluctuations and cut-offs in electrical installations causes damages to electrical appliances connected to the line. It is may be more fatal in the case of domestic appliances such as fridge and other sophisticated appliances like TV sets, DVD players, computers etc. If a fridge is operated on low voltage, excessive current flows through the motor, which heats up, and get damaged. It can be used to protect the whole installation from undesirable over and under line voltage...
ABSTRACT Celosia Argentea was planted on Agricultural and Environmental Engineering Department experimental field.
Abstract: Taylor and Davis total productivity model has significant advantage over the traditional and more commonly used productivity models - its holistic nature. The model incorporates elements of net sales, inventory changes, wagcs and salary, investor's contribution, working and fixed capital. This paper presents a unique approach in the determination of the total factor productivity for a manufacturing organisation. This study is motivated by the dearth of models comprehensive enough t...