Centre for Promotion of Educational and Scientific Research
Basant K. J .H.A, and M.L. Kaurangini
1Department of Mathematics, Ahmadu Bello University, Zaria
2Department of Mathematical sciences,Kano University of Science and Technology, Wudil
ABSTRACT
(SOLAR WATER KETTLE)
Sanusi Y. K. and Ajadi D.A
Department of Pure and Applied Physics
Ladoke Akintola University of Technology, Ogbomoso, Nigeria.
Email: sanusiyekinni@yahoo.com
ABSTRACT
A Built-in-Storage Solar Water Heater of 4.5 × 10-3 m3 liter was designed, constructed and tested for its efficiency. It was observed that the highest temperature of the water obtained is 48oC. This temperature was achieved between the hours of 16.00 and 16.30 hours local time. The efficiency of the kettle was found to be 1.65%, which is very small due to the construction size. When compared with previous work, the solar water heater that produces up to efficiency of 30% has surface area of 2.6m2 while in this work surface area is 0.15m2.Keywords: Temperature, Heater, Solar radiation, Efficiency, Absorber plate
O.N. Maitera, D. Y. Shinggu
Department of Chemistry Adamawa State University, Mubi Nigeria.
E-mail olivermaitera@yahoo.com, shinggudy2@yahoo.co.uk
ABSTRACT
The assessment of anion levels of River Gongola in Adamawa state was carried in ten sampling areas. Sampling was done in the months of February, March, and April 2007, representing dry season, while the months of July, August and September 2007, represent the wet season. Water samples were collected and analysed using DR/2010 spectrophotometer (LaMotte Co. 2000). The mean concentration of chloride ranged between 58.00 ± 1.22 and 90.83 ± 3.77mg/l for dry season and 53.33 ± 3.21 and 71.67 ± 5.21mg/l for wet season, sulphate was between 16.00 ± 3.02 and 37.67 ± 4.11mg/l for dry season and 48.33 ± 3.42 and 65.33 ± 8.21mg/l for wet season; while that of total nitrate is between 2.20 ± 0.51 to 5.14 ± 0.77mg/l for dry season and 18.0 ± 2.02 and 32.50 ± 4.32mg/l for wet season. The mean seasonal variation of NH3-N, NH4+, NH3, NO3-N, NO3– were reported with highest value of 32.50±0.00 observed in nitrate and lowest value of 0.20±0.05 was observed in phosphate. The values for the wet season were higher than that of dry season which may be due to run-off from farms as a result of fertilizer and herbicide application and animal faeces around the sampling area. All the values were within the current permissible limits of the WHO and NAFDAC. The percent ion concentrations were in the following order Cl– > CO32- > SO42- > NO3— > total nitrate > PO43-. The seasonal variations of the showed that the levels of anions were higher during the wet season than the dry season.Keywords: Season, River Gongola, Assessment, Anion levels, Pollution
Omidiora E. O. 1, *Ismaila W. O.1, Ajayi A. O 1 and Ogundele L. A. 2
1Department of Computer Science, Ladoke Akintola University of Technology, Ogbomoso
2 Department of Computer Science, Osun State College Of Education, Ilesa
ABSTRACT
Cognitive science, whose genesis was interdisciplinary, shows signs of reverting to disjoint collection fields which include psychology (especially cognitive psychology), computer technology, linguistics and psycholinguistics, philosophy (especially philosophy of mind), neuroscience, logic, anthropology and biology (including biomechanics). This paper focused on effect of cognitive science on computer science, especially artificial intelligence (AI) and Human-computer interaction (HCI). Also, various ways by which cognitive science was integrated into artificial intelligence were analysed.
Keywords Cognitive Science, Cognitive Engineering, Artificial Intelligence
E-mail: ppdavwar@yahoo.com
Data Envelopment Analysis (DEA) has evolved into one of the most efficient tools for analysis of resource utilization in most systems. The operations of hospitals at the secondary health care level was analysed using DEA. Data on hospital operations were collected and analyzed using DEA EXCEL Solver add-in Zhu (2003). Benchmark and target analyses were also carried out. The results show a generally poor performance for the hospitals at this level. The target analyses show that most hospitals would have done better without a Medical Doctor. The study therefore recommends among others, a DEA analysis involving value judgment for this and similar cases.
*Department of Physics, University of Agriculture, Abeokuta, Nigeria
**Department of Physics and Solar Energy, Bowen University, Iwo, Nigeria
***Department of Geology, University of Ibadan, Nigeria
E-mail: aj_ani2000@yahoo.com
ABSTRACT
The occurrence of sulphide ore bodies in Osina area of Benue state has been reported earlier in the geology of Nigeria map, but the extent and abundance of the mineral was not known. In this work, we investigated the thickness and depth of the mineral deposit.Induced Polarization (IP) survey employing the dipole-dipole array was conducted. The survey consisted of three lines, each of length 600m with a dipole separation of 30m in the E-W direction covering an area of approximately 1km2. A total of 150 data points each were taken for three lines in the survey area. Measurements were taken for chargeability in the time domain and Percentage Frequency Effect (PFE) in the frequency domain. Using an iterative process, an inversion scheme was carried out on the measured data to find a model M that minimizes the objective function φm subject to fitting the data to a specified degree. This model was formed and used to solve the optimization problem defining a global objective function Φ. Measured and calculated apparent chargeability’s are plotted as pseudo-sections to get the estimated depth of the ore deposit from the surface. Model generated is the section of the true estimated resistivity and chargeability.
The results showed eight anomalous zones revealing certain mineralization having attributes of galena, sphalerite and pyrite with a resistivity ranging from 100-300 ohm-m at an estimated depth of 50m. The plots of chargeability along the three traverse lines also showed a consistent range of values between 20 – 90mV/V over the distance of 90 – 100m along the lines. Different regions of high anomaly are evident in the inverse model resistivity section for the first two lines but due to bulk resistivity of the disseminated body investigated, no distinct zone could be localized. The quantitative interpretation showed that the range of overburden thickness to the top of base-metal sulphide is about 30m.
Based on the result of this investigation, it was concluded that the sulphide ore in this area is not economically viable and can be best mined through shafts or tunnels due to the depth and dipping shape of the deposit.
Key words: Sulphide ore bodies, Osina area, Induced Polarization, Chargeability,
Percentage Frequency Effect (PFE), Overburden thickness and recoverable deposit.
Akwuwuma Veronica and Egwali Annie
Department of Computer Science
University of Benin, Benin City, Nigeria
E-mail: vakwukwuma@yahoo.com; egwali.annie@yahoo.com
ABSTRACT
The economics of software security is an evaluation of the cost and benefits of adding security to software. Most firms are mainly concerned with making software functional without paying much consideration to security because of the rigors of adding security to software and because buyers have no low cost method of ascertaining quality. These nonchalant practices will only give attackers an upper hand in the race for compromising system software. It is crucial therefore that software developer protect their customers by embedding security and confidentiality into their software. Security should be a factor in software development undermining the cost. In this paper, we therefore focus on the economics of building security properties into software application. To cover the entire dimension of the economics of software security, we incorporate cost-benefit analysis models[1] to incur the cost of adding security properties into software development. We also expanded our security framework to integrate the security properties[2] and incorporated encryption, TCP/IP hardening and Buffer overflow checks.
Keyword: Cost, Security, Software, Economics, Attacks
M, E Okiotor and O.I Imasuen
Department of Physics and Energy Studies
Western Delta University, Oghara
ABSTRACT
The facies characteristics of well A in the field Y were studied using wireline log signatures and data derived from them and cores. The lithostratigraphy, facies types which helped in the interpretation of the depositional environments and their characteristics were read from the wireline logs. The logs were environmentally corrected and normalized. The core data analysis helped in confirming the properties of the various facies types and the effective establishment of the facies boundaries.
Keywords: Facies, wireline logs, characteristics, depositional environment.
Geotechnical Investigation of Gully Erosion Sites
in Ankpa Metropolis, Kogi State, Central Nigeria
Omali, A.O. Imasuen, O.I and Musa, K. …………………………….. 1-10
An Assessment of the Organic Pollution Indicator Levels
of River Gongola In Adamawa State, Nigeria
O. N. Maitera; V.O. Ogugbuajaand S.T. Magili…………………….. 11-22
Geochemical Assessment of Cretaceous Sediment in the
Nigerian Sector of the Chad Basin fromKadaru-1 and Herwa-1
Exploratory Wells for Possible Petroleum Generation
Y. B. Mohammed …………………………………………………………. 23-36
Geology and Hydrogeology of Groundwater Systems
of Yola Area, Northeast, Nigeria
Gabriel .I. Obiefuna and Donatus M. Orazulike………………… 37-64
Bioenergy Sources, Advantages and the Environment
Idiata, David. J; Aiyamenkhue, Uwuidia; Omoregie, Charles
and Enabulele, Andrew. O………………………………………………… 65-70
Effect of Types of Organic Waste on Soil Contaminated
with Spent Engine Oil in Umuahia Metropolis, Abia State
Onwuka, M. I. and Igwe A.C…………………………………………… 71-80
Potential Impacts of Climate Change on Agriculture
Chikaire, J. Nnadi, F.N., Nwakwasi, R.N., Anyoha, N.O.,
Aja O.O., Onoh, P.A., and Nwachukwu, C.A………………………. 81-85
Permeability and Grain-Size Characteristics of Sagamu
and Ibadan-Toll-Gate Lateritic Soils in Southwestern Nigeria
S. O. Idowu, G. O. Adeyemi and S. S. Dada …………………… 86-94
Community Participation in Urban Water Supply Management
in Abeokuta – Lessons For Sustainable Water Supply in Urban
Communities
Adekitan, O., Oyerinde A. O. and Musa A. I……………………… 95-108
Analysis of the Characteristics of Different Soil Types
Stabilized With Cassava Starch
Nimlyat Pontip Stephen …………………………………………….. 109-123
Nimlyat Pontip Stephen
Department of Architecture, University of Jos, Nigeria
E-mail: pontipn@unijos.edu.ng
ABSTRACT
Soil can be stabilized using several kinds of chemical and other stabilizing agents. The possibilities of utilizing cassava starch as a soil stabilizing agent and the response of five different soil types are studied in this paper. Compaction characteristics, penetration resistance, abrasion resistance, swelling potentials and compression strength of Sandy, Clayey, Humus, Laterite and Gravelly soils are analyzed. This analysis was carried out at 0, 2.5, 5, 7.5, 10, 15 and 20 percent stabilization levels by weight. The soil samples were treated with cassava starch paste at various levels and compacted in CBR and Proctor moulds using heavy and light compaction methods respectively. It is observed that the adhesive property of cooked cassava starch has a binding effect on the particles of the five soils studied. Also, a level of stability, which is soil dependent, is achieved. Laterite soil recorded a difference in CBR values of about 27 percent between the 0 percent and 7.5 percent stabilization levels with better penetration resistance. Stabilized clay offered the best resistance to abrasion that improved with increase in starch content. The other soil types were also observed to be relatively poor in resistance to water absorption. Increasing the starch content and hydration period, a compressive strength of 3.55N/mm2 at the 20 percent stabilization level was established for the laterite soil at 28 days hydration period. This result when compared to the strength of 0.5N/mmn2 at 0 percent level is an indication of improvement in compressive strength.
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