30 research outputs found
Towards malaria control: the knowledge of health care providers about mosquito and malaria transmission
No full textDistributed control of reconfigurable mobile network agents for resource coordination
No full textIncludes abstract.Includes bibliographical references.Considering the tremendous growth of internet applications and network resource federation proposed towards future open access network (FOAN), the need to analyze the robustness of the classical signalling mechanisms across multiple network operators cannot be over-emphasized. It is envisaged, there will be additional challenges in meeting the bandwidth requirements and network management...The first objective of this project is to describe the networking environment based on the support for heterogeneity of network components..
Estimation of transport and degradation parameters for naphthalene and anthracene: Influence of mass transfer on kinetics
No full textThe method of temporal moment solutions (MOM) for onedimensional convective-dispersive solute transport involving linear equilibrium sorption and first order degradation for time pulse sources has been applied to analyze experimental data from a soil microcosm reactor. Estimation of the pore-water velocity V for a non-reactive solute was aided by the use of only the first normalized moment while the dispersion coefficient D, first-order degradation rate constant λ and the retardation factor R were estimated using both first and second normalized moments. These transport and degradation parameters were compared to those obtained by a transport model using a nonlinear least square curve-fitting program CXTFIT (version 2.0). Results obtained showed that the MOM fits the breakthrough curve with tailing better than the CXTFIT. The initial estimates of these parameters aided the reduction of the dimensionality of the search process of the nonsteady state model. A residual concentration of naphthalene 1.12E-5mg/l, 1.48mg/l, and anthracene 7.67E-4mg/l, 1.61mg/l in the axial and radial directions respectively suggests the preference of naphthalene during the biodegradation process. The surface concentration as depicted using threedimensional plots, showed that there is occlusion of the aromatics (naphthalene and anthracene) within the soil micropores thereby limiting their bioavailability and in the long run increasing their toxicity.Journal of the Nigerian Association of Mathematical Physics, Volume 15 (November, 2009), pp 223 - 23
DESIGN AND FABRICATION OF AUTOMATED YAM COOKING AND POUNDING MACHINE
No full textThis work is focused on the design and fabrication of automated yam cooking and pounding machine to perform the hygienic processing of pounded yam thereby eliminating the laborious process and also minimizing of time involved in processing pounded yam. The aim of this project is to design and fabricate a machine that will cook and pound the yam. During the design and fabrication of this machine, many factors were considered and these include cost of production, effectiveness of the machine, economic requirement and maintenance. The machine was fabricated using stainless steel, mild steel, pulleys, belt, bearing and shaft. A type A37 belt was used (v-belt), the depth of the bowl is 160mm, length, width and thickness of the beater is 73 x 30 x 3 mm. The cooking aspect and automated part of the machine includes; the heating element (electric heater), contactor, thermostat and timer. The diameter of the driving pulley is 150mm and the diameter of the driven pulley is 200mm. The test and performance evaluation of the machine was carried out at the University of Benin workshop. The result from the testing showed that the yam cooking and pounding machine produced a hygienic and well processed pounded yam in a lesser time. It totally eliminated the laborious process involved in pounding. The efficiency of the machine was 84.523% which is fair for a locally fabricated machine. Given that some percentage was lost due to the vibration from the motor. Keywords: Yam, Cooking, Pounding Machine, Design, Fabrication, Automated DOI: 10.7176/IEL/14-1-05 Publication date: July 31st 202
Dams and livelihood: the control of parasitic diseases in communities hosting dams in Nigeria
No full textRiver basinsWater lawWater resource managementDamsSchistosomiasisWaterborne diseasesPublic health
Dams and livelihood: the problems of parasitic diseases in communities hosting dams in Nigeria
No full textDamsRiver basinsSchistosomiasisWaterborne diseasesPollution controlLegislationPublic healthWater resource managementLakes
Accumulation patterns and risk assessment of metals and metalloid in muscle and offal of free-range chickens, cattle and goat in Benin City, Nigeria
No full textThe use of free range animals for monitoring environmental health offers opportunities to detect exposure and assess the toxicological effects of pollutants in terrestrial ecosystems. Potential human health risk of dietary intake of metals and metalloid via consumption of offal and muscle of free range chicken, cattle and goats by the urban population in Benin City was evaluated. Muscle, gizzard, liver and kidney samples were analyzed for Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Cd, and Pb concentrations using inductively coupled plasma mass spectrometer (ICP-MS) while Hg was determined using Hg analyzer. Mean concentrations of metals (mg/kg ww) varied significantly depending upon the tissues and animal species. Human health risk estimations for children and adults showed estimated daily intake (EDI) values of tissues below oral reference dose (RfD) threshold for non essential metals Cd, As, Pb and Hg thus strongly indicating no possible health risk via consumption of animal based food. Calculated Hazard quotient (THQ) was less than 1 (< 1) for all the metals analyzed for both adult and children. However, Cd and As had the highest value of THQ suggestive of possible health risk associated with continuous consumption of Cd and As contaminated animal based foods. Hazard Index (HI) for additive effect of metals was higher in chicken liver and gizzard for children and chicken liver for adults. Thus, HI indicated that chicken liver and gizzard may contribute significantly to adult and children dietary exposure to heavy metals. Principal component analysis (PCA) showed a clear species difference in metal accumulation between chickens and the ruminants. This study provides baseline data for future studies and also valuable evidence of anthropogenic impacts necessary to initiate national and international policies for control of heavy metal and metalloid content in food items
Determinants of sexual practices among secondary school students in nigeria:Focusing on socio-cultural and school-related factors
No full textBACKGROUND: Very little is known about the school-related and sociocultural determinants of the sexual practices amongst Nigerian secondary school students. This study aims to determine such factors amongst them. METHODS: This was a descriptive questionnaire-based cross-sectional survey of 2,530 students from 13 Nigerian secondary schools. RESULTS: Roughly a fifth (22.1%) of the respondents had engaged in sex and their mean (±SD) age of sexual debut was 13.8 (±3.6) years; 82.3% and 53.6% of those who had ever had sex had a history of vaginal sex and oral sex, respectively. Also, 52.3% and 58.9% of those with a history of vaginal sex and oral sex had multiple sexual partners, respectively. No significant difference exists between respondents’ lifetime sexual history and school type (private versus [vs.] public); student’s class (SS 1 vs. SS2 vs. SS3); and mode of the studentship (day vs. boarding) (p-values>0.05). However, the following factors were found to predict a positive history of engagement in sexual practices amongst the respondents: age ≥ 20 years (aOR:5.24; 95%CI:2.21-12.46); age 15-19 years (aOR:1.99; 95%CI:1.02-3.88); studying in northern Nigeria (aOR:1.96; 95%CI:1.02-3.88); being a Yoruba (aOR:2.28; 95%CI:1.24-4.22); being male (aOR:1.89; 95%CI:1.17-3.04); and being a Muslim (aOR:2.17; 95%CI:1.30-3.64). CONCLUSION: Age, gender, school location, tribe, and religion were significantly associated with the positive sexual history of Nigerian secondary school students.</p
