Full Text Available
Access Repository
Search Results - low properties
- Go to Previous Page
- Showing 101 - 102 results of 102
-
THE SOCIAL COST OF FARMER-HERDER CONFLICTS IN ISEYIN,OYO STATE, NIGERIA
Published 2023-03Call Number: Loading…
Located: Loading…Article Loading… -
INDIGENOUS USURY SYSTEM AND INFORMAL MICROFINANCE IN IBADAN, NIGERIA
Published 2017-04Call Number: Loading…
Located: Loading…
Search Tools:
Refine Results
Page will reload when a filter is selected or excluded.- Computer Science & IT 4 results 4
- Engineering & Technology 4 results 4
- Artificial Intelligence & Machine Learning 3 results 3
- Moisture content 3 results 3
- Proximate analysis 3 results 3
- Basement complex 2 results 2
- Bush mango 2 results 2
- Chemistry 2 results 2
- Chloroquine phosphate 2 results 2
- Cold-Drawn 2 results 2
- Darcy flow 2 results 2
- Engineering properties 2 results 2
- Forcheimer equation 2 results 2
- Geomorphology 2 results 2
- Groundwater potential 2 results 2
- Hydraulic properties 2 results 2
- Lineament extraction 2 results 2
- Natural Sciences 2 results 2
- Natural Sciences — Physical Sciences 2 results 2
- Soil moisture content 2 results 2
- Starch 2 results 2
- The effect of grain size on the mechanical properties of cold-drawn low carbon steel was investigated. Low carbonsteel specimen cold-drawn to 20%, 25%, 40% and 55% as applicable for the manufacture of 4 inches, 3 inches,21/2 inches and 2inches nail were obtained. The study was aimed at providing experimental result for the understanding of grain size effects which occur with increasing degree of cold-drawn deformation in low-carbon steel used for nail manufacture.The micrographs of steel were obtained using optical microscopy(OM) observation for 20%, 25%,40% and 55% degrees of drawn deformation. From the OM micrographs the counting method as stated in the ASTME E112 standard for grain size was used to determine the grain size of the steel on the micrograph at the different degrees of deformation. The tensile strength, yield strength, brinnel hardness, and toughness of the materials were obtained from mechanical tests. It was shown that the tensile strength, yield strength, toughness and hardness follow quite closely the hall-petch equation. 2 results 2
- Toughness 2 results 2
- thermal conductivity 2 results 2
- thermal diffusivity 2 results 2
- yield strength 2 results 2
- "A lot of wood waste is generated from wood species in the Nigerian wood mills which are hazardous to the mill, mill workers and the wood. These wastes can be incorporated into plastic composites to manufacture value added products for interior and exterior applications in housing construction. This work examined the production and testing of plastic composites from mixed sawdusts of Gmelina arborea and Khaya ivorensis. Mixed sawdust of G.arborea and K. ivorensis collected from mills were screened, dried, milled to 0.4mm particle size, blended with polyvinylchloride (PVC) and chemical additives (calcium carbonate, talcum, calcium, magnesium and zinc stearate) in ratios 3:16:1;5:14:1 and 7:12:1. The mixes were extruded at barrel and die temperatures of 140oC and 165oC conditioned at temperature of 20oC and relative humidity of 55%. Specimens were cut from the products and tested for flexural and sorption properties in comparison with those of locally sourced commerical 100% PVC. The moduli of rupture and elasticity of the plastic composites were between 13.2 to 22.9 N/mm2 and 1254.0 to 3346.7 N/mm2 respectively as against 2.4N/mm2 and 902.0N/mm2 for 100% PVC while the impact strength ranged between 5.0 to 7.9 N/mm2 in comparison with 2.1N/mm2 for 100% PVC. The results obtained revealed that the flexural properties were superior to those of commercial 100% PVC and increased with increasing wood content. The plastic composites produced were dimensionally stable with low sorption rates and were suitable for moderately stressed interior and exterior purposes. " 1 results 1
- "Nigeria’s endowment of natural forest was so vast that it was thought to be inexhaustible. Today the resource base has been badly eroded. Only about 5% of the nation's land area is under forest cover. The current situation is that the nation can no longer meet its domestic wood need and has thus have to rely on wood importation to supplement domestic production. Though series of efforts have been made to bridge the gap via plantation establishment; the results of these efforts have not been good enough to achieve the objective. This paper traces the history of forest plantation establishment in Nigeria form the early part of the 19th century to date. It is observed that the level of private participation in forestry development in the country is still very low. This is contrary to the contemporary global trend in which private participation in plantation development is growing rapidly. It is suggested that public enlightenment; legislative reforms, provision of technical and financial assistance; funding of relevant research targeted at the private sector's needs and prevision of clear definition of property rights be embarked upon by the government in order to stimulate the interest of private investors." 1 results 1
- "The aim of this instrumental study is to develop, validate and measure the psychometric properties of Academic Motivation Scale (AMS) among Secondary School Students in Ibadan metropolis. The study adopted a survey research design. The participants in the study were 432 (228 male; and 204 female) Secondary School Students randomly selected from public secondary schools in Ibadan metropolis. Their age ranged between 12 and 18 years and with mean age of 14.3 years. Confirmatory Factor Analysis (CFA), Pearson’s Product Moment Correlation (PPMC) and Principal Component Analysis (PCA) were used to analysis the data. In purification process, items with low total-item correlation, using 0.3 as a baseline, were discarded. The three-factor CFA loadings were all strong and above .40. For the Model fitness of the Scale to theoretical construct, the Chi-Square Goodness of Fit (GOF) obtained was significant (x2 df = (32) = 227.219; p<.001). Other fitness measure (i.e. RMSEA = <0.08; CFI = 0.90; and Coefficient of Determination (CD) for the residual =0.99 (99%) proved the fitness of the developed scale to the theoretical construct. As expected, the sub-scales of AMS significantly correlated (Intrinsic Motivation and Extrinsic Motivation; r = .370 p<.001) however, Amotivation and Intrinsic Motivation (r = -.094 p>.05); Amotivation and Extrinsic Motivation (r = .022 p>.05) were not significant. The study proved the construct validity of the scale. The internal consistencies of the sub-scales were obtained as: Intrinsic (5 items), a =.83; Extrinsic (5 items) a =.72; Amotivation, (3 items) a =.70; Overall Academic Motivation Scale, (13 items) a =.74. The study has implication for students, motivational mechanism and directions are understood to reduce the number of academic failure and drop-out. It was recommended that Counselling Psychologists should look into the motivational tendencies of helping students in diagnosing problematic areas of those that are not motivated towards academics. " 1 results 1
- "The dwindling timber resource and the attendant shortage of wood supply call for alternative furnish for composite production. Rattan canes are candidate materials due to their availability, renewability and inexpensive processing cost. This work therefore examined the feasibility of using rattan canes as reinforcements for plastic composites production by evaluation the strength and sorption properties. Particles extracted from Eremosphatha macrocarpa and Laccosperma secundiflorum canes harvested from wild stocks were milled into 0.4mm, dried to 0.5% moisture content, blended with high density polythylene (HDPE), talcum, zinc stearate Ethylene bistearamide (EBS) wax in the ratio 1.0:0.82: 0.12:0.04:0.02 respectively and extruded using rotating twin-screw at barrel and die temperatures of between 149 and 193 oC. The composite were cut to sample sizes and tested for flexural properties on a universal testing machine while sorption properties were evaluated after 2 and 24 hours immersion in water. The results obtained revealed that the respective moduli of ruputre and elsaticities of the E. macrocarpa and L. secundiflorum composites were 26.2 and 26.4 N/mm2 and 2689 and 3406 N/mm2 while the water absorption were between 1.2 to 3.1% and 1.0 to 2.4% and thickness swelling were 0.4 to 1.0 and 0.3 and 0.9% after 2 and 24 hours immersion in water. The study revealed that rattan canes were suitable as reinforcement for plastic composite production, dimensionally stable with low water absorption and thickness swelling rates and can be applied for both structural and non-structural interior and exterior purposes. Differences in the rattan anatomy influenced the ductility and sorption properties of the plastic composites " 1 results 1
- see all…