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Search Results: 1 - 10 of 198085 matches for " Offor N Kimambo "
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Energy efficient refuse derived fuel (RDF) from municipal solid waste rejects: a case for Coimbatore
Offor N Kimambo,P Subramanian
International Journal of Environment , 2014, DOI: 10.3126/ije.v3i2.10530
Abstract: In this paper production of energy efficient Refuse Derived Fuel (RDF) from municipal solid waste rejects was carried out during August 2012 – April 2013 in Coimbatore City India. Municipal Solid wastes rejects (paper, plastics with exception of polyvinyl chloride, textiles) were collected from waste dump yard of Coimbatore City. Sawdust, coir dust, water hyacinth and rice husk were mixed with the collected wastes at a fixed amount of 20 percent. After grinding, cassava starch was used as a binder to produce RDF briquettes with the help of uniaxial piston briquettes making machine. Physical, chemical and thermal characteristics of the RDF were studied to assess their potential use as energy efficient material. The analyses were divided into three categories namely, physical, proximate and ultimate analyses. Results indicated that, under physical and proximate analyses; impact resistance index (IRI) for all the RDF samples were 200, density were less than 1 kg cm -3 , moisture were less than 10 % wt, ash content varied from 2.8 to 9.2 % wt, whilst volatile mater had mean value of 83.1 % wt and fixed carbon which is by subtraction ranged from 1.4 to 9.2 % wt. With respect to Ultimate analysis, Oxygen, carbon, hydrogen varied from 27.01 to 39.78 % wt, 44.8 to59.7 % wt, 5.9 to 8.1 % wt respectively. On the other hand nitrogen, sulfur and chlorine ranged from 0.18 to 0.87 % wt, 0.27 to 0.71 % wt and 0.339 to0.521 % wt respectively. Calorific values (high heating values) ranged from 5085 to 6474.9 kcal kg -1 . The results were compared with Energy research Centre for the Netherland database and noted that with exception to moisture, fixed carbon and hydrogen other parameters had a significant lower or higher differences. From the study, RDF from municipal solid wastes rejects along with the additives produced high energy efficient materials. DOI: http://dx.doi.org/10.3126/ije.v3i2.10530 International Journal of the Environment Vol.3(2) 2014: 205-215
Personal Identity and “Life-Here-After Poetics”: A Critique of Maduabuchi Dukor’s Metaphysics  [PDF]
Francis Offor
Open Journal of Philosophy (OJPP) , 2013, DOI: 10.4236/ojpp.2013.31A024

This essay examines Maduabuchi Dukor’s perspective on the African conception of man, personal identity and“life-here-after”. This is with a view to showing that although, Dukor’s views represent what obtain among some ethnic nationalities in Africa, this nevertheless does not provide a basis for generalising across the whole of Africa, as there are countless number of ethnic groups in Africa to which Dukor’s general claims may not be applicable. Given the varieties of metaphysical conceptions of man and destiny in Africa which we are yet to fully explore, and given also the inherent contradictions in some of these conceptions, which calls into questioning, the veracity of claims made therein, it will amount to a major logical error to make sweeping generalisations that would be representative of the whole of Africa. Such generalisations would remain a non-holistic, but partial representation of the African conception of man and human destiny.

Willingness of high school students to be treated by an HIV infected health practitioner. a study done in dar es salaam, Tanzania.
A Kimambo
Dar Es Salaam Medical Students' Journal , 2010,
Abstract: OBJECTIVE To assess willingness of high school students to be treated by HIV/AIDS infected dental practitioners in Ilala municipality, Dar Es Salaam, Tanzania. METHODOLOGY This was a descriptive cross-sectional study. RESULTS More than half (52.8%) of the high school students showed fear of being treated by HIV/AIDS infected dental practitioner, with 175 (55.4%) out of 316 students fearing even to be clinically examined by HIV positive dental practitioner. Out of 316 students, 163 (51.6%) students showed no problem in consulting a HIV/AIDS infected dental practitioner for dental problems. There were 170 (53.8%) respondents who were uncomfortable to undergo dental treatment provided by HIV positive dental practitioner. CONCLUSION The results of this study showed that there is fear an element of negative attitude and stigmatization among high school students on being treated by HIV/AIDS infected health care practitioner.
Potentials of palm bunch ash on yield of zea mays
US Offor
Journal of Agriculture and Social Research (JASR) , 2010,
Abstract: Field study were conducted on the effectiveness of using different rates of palm bunch ash to increase fruit field of maize during the 2009 cropping season at the teaching and search form of the Rivers State University of Education Ndele campus, Port- Harcourt Rivers State, Nigeria. The experiments were laid out in a randomized complete Block design (RCBD) with four treatments replicated three times. The treatment comprised of 0kglha, 80kglha, 160kglha and 240kglha palm bunch ash respectively. Date analyzed showed that application of palm bunch ash to the rate of 80kglha significantly increased whole grain weight,
The Quest For Development In Africa And The Dilemma Of Competing Cultural Paradigms
F Offor
Journal of Philosophy and Culture , 2006,
Abstract: This essay reopens the debate among African politicians and intellectuals concerning which paradigm is the most suitable for achieving the goals of development in Africa at this present moment of her history. Since the early 70s, African intellectuals and politicians have reflected on this problem and the highpoint of the debate was that only a synthesis of our traditional cultural elements with other relevant areas of foreign culture holds the prospects for achieving this goal. This essay however indicts this latest position as encouraging the hegemonisation of western cultural values as well as the marginalisation of those African states for which this paradigm is meant to serve as blueprint for development. The essay then identifies the need for the debate to transcend the basic assumptions underlying the major paradigms by preferring an approach that will not only guide against the continued marginalisation of African states, but that will at the same time ensure their effective participation in the development process currently going on across the globe. Journal of Philosophy and Culture Vol. 3 (1) 2006: pp. 153-172
Socrates, Science and Technology
Francis Offor
Canadian Social Science , 2012, DOI: 10.3968/2719
Abstract: This essay examines the contributions of Socrates tothe development of Greek thought and philosophy andthe import of these contributions for developments incontemporary science and technology. Science andtechnology, today permeate the essential compartmentsof our lives, but the Socratic injunction for science togo hand-in-hand with ethics has been jettisoned bycontemporary science. This, the essay argues, is thesource of contemporary ills accompanying the variousscientifi c feats. Paying attention to the Socratic injunction,the essay concludes, is one sure way of giving science andtechnology a humane face and thereby put both properly atthe service of mankind. Key words: Ethics; Dialectics; Technology;Development; Human values
An Accurate and Computationally Efficient Explicit Friction Factor Model  [PDF]
Uchechukwu Herbert Offor, Sunday Boladale Alabi
Advances in Chemical Engineering and Science (ACES) , 2016, DOI: 10.4236/aces.2016.63024
Abstract: The implicit Colebrook equation has been the standard for estimating pipe friction factor in a fully developed turbulent regime. Several alternative explicit models to the Colebrook equation have been proposed. To date, most of the accurate explicit models have been those with three logarithmic functions, but they require more computational time than the Colebrook equation. In this study, a new explicit non-linear regression model which has only two logarithmic functions is developed. The new model, when compared with the existing extremely accurate models, gives rise to the least average and maximum relative errors of 0.0025% and 0.0664%, respectively. Moreover, it requires far less computational time than the Colebrook equation. It is therefore concluded that the new explicit model provides a good trade-off between accuracy and relative computational efficiency for pipe friction factor estimation in the fully developed turbulent flow regime.
Artificial Neural Network Model for Friction Factor Prediction  [PDF]
Uchechukwu Herbert Offor, Sunday Boladale Alabi
Journal of Materials Science and Chemical Engineering (MSCE) , 2016, DOI: 10.4236/msce.2016.47011
Abstract: Friction factor estimation is essential in fluid flow in pipes calculations. The Colebrook equation, which is a referential standard for its estimation, is implicit in friction factor, f. This implies that f can only be obtained via iterative solution. Sequel to this, explicit approximations of the Colebrook equation developed using analytical approaches have been proposed. A shift in paradigm is the application of artificial intelligence in the area of fluid flow. The use of artificial neural network, an artificial intelligence technique for prediction of friction factor was investigated in this study. The network having a 2-30-30-1 topology was trained using the Levenberg-Marquardt back propagation algorithm. The inputs to the network consisted of 60,000 dataset of Reynolds number and relative roughness which were transformed to logarithmic scales. The performance evaluation of the model gives rise to a mean square error value of 2.456 × 1015 and a relative error of not more than 0.004%. The error indices are less than those of previously developed neural network models and a vast majority of the non neural networks are based on explicit analytical approximations of the Colebrook equation.
Amendment of crude oil contaminated soil with sawdust and chromoleana leaves for optimum plant protection
US Offor, LA Akonye
African Journal of Biotechnology , 2006,
Abstract: A study on the effectiveness of sawdust and chromoleana leaves as soil restorative measures to optimize plant growth at two intensities of crude oil contamination showed that both restore parity on the growth parameters (leaf area, leaf ratio, relative leaf growth rate, relative growth rate, and net assimilation rate) of crops tested compared to control. However, chromoleana leaves was found to be more effective than sawdust. The test crops Zea mays and Vigna unguiculata differed with respect to their response to amendments applied. V. unguiculata showed better response than Z. mays in most of the parameters tested
Patients’ Assessment of Pharmacists’ Medication Counseling in a Psychiatric Hospital in Nigeria
I Offor, EFO Enato
Tropical Journal of Pharmaceutical Research , 2011,
Abstract: Purpose: To assess the impact of an educational intervention on pharmacists’ medication counselling practice, and evaluate the reliability of an instrument to assess medication counselling in a psychiatric setting. Methods: The study was undertaken on a sample of 297 psychiatric patients. Pre- and post-intervention surveys were conducted immediately after the patients had been attended to at the hospital’s outpatient pharmacy, using a self-administered questionnaire, comprising 4 components. Internal consistency of the questionnaire was computed using Cronbach’s alpha. Differences between means or proportions of variables were evaluated using Student’s t-test or Chi-square test, as appropriate. Results: The study achieved a response rate of 89 and 92 % for pre– and post–intervention surveys, respectively. Cronbach’s alpha reliability of the instrument was found to be 0.74. The mean values for the different components evaluated during the pre- and post–intervention surveys were: Needs assessment, 1.89± 0.76 and 2.58 ± 0.61; Precaution and warning, 1.50 ± 0.67 and 2.15 ± 0.63; Managing therapy, 1.87 ± 0.89 and 2.46 ± 0.78, and Communication, 2.23 ± 0.77 and 2.69 ± 0.62, respectively. The post–intervention results were significantly higher in all the components (p < 0.05). Conclusion: The educational intervention provided for pharmacists resulted in an improvement in patient counselling. The survey instrument achieved a fairly satisfactory reliability result in a psychiatric setting. Efforts to sustain this intervention are recommended.
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