7,742 research outputs found

    Mode NASA blade used to calculate the power generator for (VAWT) by drag and lift coefficients

    Get PDF
    One of the confrontations with increasing demand on power in the entire world the methodologies of provided power divided into traditional methods against renewable methods. This article presents a simulation model to estimate the integrated power from vertical access wind turbine (VAWT) stages of development of a simulation model of local power supply system (LPSS) with (VAWT). However, wind power is one of the quickest developing advances for the sustainable power age. Disturbingly, in the ongoing years a few instances of corruption on telecommunication systems frameworks have emerged because of the presence of wind ranches, and costly and in fact complex restorative estimations needed. The grade of variation of power verified according to the grid size. The parameters were taken in the study through the preparation of the model are (efficiency, cost, and system response) compared to the benefits against disadvantages when combining the two systems to achieve a high performance of the power stability

    Design and construction of 4.27M (LOA) rowing transport boat (punt) for inland water bodies

    Get PDF
    Flat bottom boat (Rowing Punt) 4.27M length overall (LOA) was designed and constructed using plywood and fiber glass materials. The boat posses features like easy construction stability and high capacity to carry load. Other features include least cost light weight, shallow draft of 9cm easy maneuverability. The light displacement (weight empty) is 96.6kg which is similar to local boat of same size. The capacity of the boat 544kg (8 person) and total cost of production was N41,150.00 which is not beyond the reach of an average fisherman. The Rowing Punt easily propelled by oaring which makes it adequate for fishing activities on shallow water bodies. Such easily maneuvered craft can also be used for recreation which include, sport fishing, and boating

    WHO Takes Action to Promote the Health of Refugees and Migrants

    Get PDF
    Migration is a defining issue of our time, with 1 billion migrants globally, of whom 258 million have crossed borders. Climate change and political instability propel ever-greater displacement, with major detriments to health. Policies that fail to prevent human trafficking or guarantee essential services undermine Universal Health Coverage (UHC) and the global pledge to “leave no one behind.” The World Health Assembly should robustly implement WHO’s Global Action Plan (GAP) on the Health of Refugees and Migrants.ugees and Migrants

    Self-efficacy, Information Accessibility and Utilization as Determinants of Creativity of Managers in Packaging Companies in Nigeria

    Get PDF
    This paper investigated self-efficacy information accessibility and utilization as factors determining creativity of managers in packaging companies in Nigeria. The research design adopted for the study was survey method. The study population comprised 540 managers in eleven packaging companies in Nigeria. The questionnaire was used to collect data from the 540 managers out of which 485 responded and valid for analysis given a response rate of 89.8 percent.The study revealed that self-efficacy, information accessibility and utilization had significant positive correlations with the creativity of the respondents. In addition, self-efficacy, information accessibility and utilization were found to be significant determinants of creativity of the managers in the packaging companies in Nigeria.It is therefore recommended that the Board of management in these companies should give much attention to self-efficacy, information accessibility and utilization when planning to improve the creativity of their managers. They should endeavour to encourage their managers to make intensive use of information and have wide access to available information resources internally and externally for better creativity. Keywords: Self-Efficacy, Information Accessibility, Information Utilization, Managers, Packaging Companies, Nigeria

    Effect of Temperature and Catalyst on Biofuel Yields from Pyrolysis of African Copaiba Balsam (Daniellia Oliveri) Sawdust

    Get PDF
    The effect of sodium carbonate (Na2CO3) on biofuel yields from pyrolysis of Daniellia oliveri sawdust in a fixed bed reactor has been studied. The sawdust was procured from the New Sawmill, along Ilorin-Ibadan expressway, Ogbomoso, South-Western Nigeria. The sample was sundried for three days to reduce its moisture content. Catalytic pyrolysis of the sawdust was performed with different weight percentages of catalyst (10, 20, 30 and 40 wt.%) in the feed. Noncatalytic pyrolysis was also performed for the same temperatures and biofuel yields from both sets of experiments were compared. Char yield increased with an increasing percentage of catalyst and were higher than those from non-catalytic pyrolysis in all but one case, the highest being 49.42% at 500 oC (biomass/catalyst ratio of 60/40) and the lowest, 15.41% at a non-catalytic temperature of 400 oC. Bio-oil yields at 400 and 600 oC followed the same trend up to biomass/catalyst ratio of 70/30 while the yields at 500 oC, though higher than those from noncatalytic experiments in most cases, did not significantly change with an increasing percentage of catalyst. The highest yield of bio-oil (37.64%) was obtained at 600 oC (biomass/catalyst ratio of 90/10) and the lowest (16.41%) at 400 oC (biomass/catalyst ratio of 80/20). Gas yields in most cases decreased with an increasing percentage of catalyst and were all lower than those from non-catalytic experiments, the highest yield (62.77%) obtained at a temperature of 400 oC (noncatalytic) and the lowest (19.73%) at 500 oC (biomass/catalyst ratio of 60/40)

    ORGANISATIONAL CULTURE AS A DETERMINANT  OF WORKERS’ JOB COMMITMENT IN PUBLIC SECONDARY SCHOOLS IN OGUN STATE, NIGERIA

    Get PDF
    This study examined organisational culture as a determinant of workers’ job commitment in public secondary schools in Ogun State. The  study adopted an ex-post facto design approach. The population consists of all workers (teaching and non-teaching staff) in secondary schools in Ogun State, Nigeria. A multi-stage random sampling technique was adopted where five (5) public secondary schools (comprising of both junior and senior) were randomly selected from each of the local government area s from twenty (20) local government areas in Ogun State, making a total of ten (10) secondary schools were selected for the study. Stratified random sampling technique was used in selecting ten (10) workers (teaching and non-teaching) from each junior and secondary  schools respectively, making a total number of twenty (20) workers from each of the selected ten (10) secondary schools. A total number of 200 workers was selected  for the  study. The  instrument  used for this study is a questionnaire which is sub-divided into three sections. Section A was used to collect information on personal characteristics of the respondents while Section B contained Workers Organisational Commitment Scale which was designed to measure workers’ job commitment. Section C contained Organisational Climate Index (OCI) and was used to measure organisational culture.  Data was analyzed using regression and T-test analysis at 0.05 level of significance. Findings revealed that organisational culture has significant relationship with public secondary school workers’ job commitment and that there was no significant difference in public secondary school workers’ job commitment between senior and junior school employees. It is concluded that organisational culture determines job commitment of public secondary school employees in Ogun State. Based on the findings, it is therefore recommended  that motivation strategies should adopted to improve teachers’ salaries and promotions. Teachers should positively change their attitude s to work and view their job as more of a  call than a profession.     &nbsp

    Indices of Kidney Damage and Cardiovascular Disease Risk Factors in a Semiurban Community of Iloye, South-West Nigeria

    Get PDF
    Health screening exercises are important, as they enable early detection of diseases in individual subjects and also enable data collection, useful in estimating disease burden in the community. This paper describes the findings of a health screening exercise conducted in a semiurban population of Iloye, by the Rotary Club of Ota, Ogun State, Western Nigeria, as a part of its community-oriented services and projects. Three hundred and twenty six community members were screened during the exercise. There were 189 (57.97%) females and 137 (42.03%) males, with a mean age of 43.5 ± 14.88 yrs. Urinary abnormality and/or creatinine clearance less than 90 mls/min was detected in 147 (45.09%) participants. 99 (30.37%) participants had proteinuria, 16 (4.91%) had haematuria, and 5 (1.53%) participants had both haematuria and proteinuria. Eight (2.45%) participants had GFR less than 60 mls/min. Elevated blood pressure was found in 152 (46.63%), while 3 (0.9%) participants had diabetes, 71 (21.8%) were obese, 16 (4.9%) had hypercholesterolaemia, and 3 (0.9%) had hypertriglyceridaemia. Prevalence of both smoking and alcohol consumption was 6 (1.84%). It was concluded that the prevalence of indices of kidney damage and cardiovascular risk factors is high in Iloye community

    Empirical modelling of geotechnical strength based on index properties: a case of patti formation, southern bida basin, nigeria

    Get PDF
    The strength properties of geo-materials are paramount to the stability or otherwise of civil engineering structures. However, the determination of some of these properties such as California Bearing Ratio (CBR) and Unconfined Compressive Strength (UCS) is costly and time-consuming. This necessitates the generation of models that can quickly predict the strength properties from cost-effective and less time-consuming index properties of the same geo-materials. In this study, an attempt has been made to predict the CBR and UCS values from Atterberg limit tests for sediments derived from Patti Formation, Southern Bida Basin, Nigeria. The tests were performed following appropriate codes of the British Standard Method for testing materials. Both linear and polynomial fitting models were employed for regression analysis between the index and strength parameters. The results showed that Liquid Limit (LL), Plastic Limit (PL), and Shrinkage Limit (SL) are strongly correlated with UCS and CBR, having R2 ranging from 0.8-0.91. The equations can be used to quickly predict UCS and CBR in areas with similar geology. Similar studies are recommended in other parts of the country to aid the regional evolution of models for rapid strength characterization of geo-materials. &nbsp

    Determination of entrance skin dose from diagnostic X-ray of human chest at Federal Medical Centre Keffi, Nigeria

    Get PDF
    patient during x-ray examination in Federal Medical Centre, Keffi in Nasarawa state, Nigeria. Entrance skin doses (ESDs) for a common type of x-ray procedures, namely chest AP/PA (anterior/posterior) were measured. A total of 200 data were collected from patients who were exposed to diagnostic X-ray during their routine chest X-ray examinations. The age of the patients ranged from 15 to 68 years old while the weight and height of these patients ranged from 37.5kg to 98.5kg and 130.0cm to 175cm,  respectively. The patent’s skin dose were determined using Edmond’s formula, which is based on the X-ray tube and the radiographic exposure parameters of kVp, mAS, SSD and the total filtration of the beams. The calculated mean skin dose ranges from 0.013± 0.01mGy to 0.851±0.023mGy. In general, the ESDs measured for this type of x-ray procedures were found to be lower than or in agreement with the guidance level set by the Nigerian Basic Ionizing Radiation Regulation (NBIRR, 2003) standard and other international bodies and does not pose any significant health risk to the patience or the workers.Keywords: Entrance skin Dose, X-ray, Anterior-Posterior, Exposure, and Radiation

    Clinical outcomes in hypertensive or diabetes patients who concomitantly use complementary medicines in Lagos, Nigeria

    Get PDF
    Background: The use of complementary medicines in addition to medical prescription by patients with hypertension, diabetes and other chronic diseases presents a challenge for healthcare providers in Nigeria and globally. There is very little data on the clinical outcomes in these patients.Objectives: To evaluate clinical outcomes in hypertensive or diabetic patients who use complimentary medicines in Lagos Nigeria .Design: Observational cross-sectional study.Setting: Lagos University Teaching Hospital Medical Outpatient Clinics.Subjects: Five hundred patients attending Lagos University Teaching Hospital Medical out-patient clinics with a diagnosis of diabetes mellitus or hypertension or diabetic hypertensive were studied.Main outcome measures: The effect of complementary medicines use on blood pressure and blood glucose control were evaluated.Results: The mean arterial blood pressure of non-users of complementary medicine was 115.329 mmHg and that of users was 105.138mmHg. Also the mean fasting blood sugar of non-users was 129.515mg/dl and that of users was 131.453mg/dl. (P>0.05).Conclusion: Although not statistically significant, complimentary medicines were found to be of advantage to hypertensive patients but not diabetic patients
    corecore