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Search Results: 1 - 10 of 3074 matches for " Felix Omoruwou "
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Production of Biogas from Co-Digestion of Cow Dung, Saw Dust and Maize Husk  [PDF]
Akindele Oyetunde Okewale, Felix Omoruwou, Christiana Edward Anih
Advances in Chemical Engineering and Science (ACES) , 2018, DOI: 10.4236/aces.2018.83008
Abstract: The co-digestion of cow dung, with maize husk for biogas production at laboratory scale was investigated. The study was carried out at a temperature range of??24°C - 30°C and pH range of 5.5 - 6.5 for a period of 60 days with a total solid concentration of 7.4% in the digester sample (fermentation slurry). Water displacement method was used to collect the biogas produced which was subsequently measured. 444.8 mL was the cumulative biogas yield at the end of 60 days retention time in the digester 1, which comprised of cow dung, maize husk, and water. Digester 2, which is made up of sawdust, cow dung, and water produced negligible biogas at the end of 60 days of the experiment. X-RF analysis revealed high presence of elements like silica, aluminium oxides, and aluminium oxides in cow dung, maize husk, and sawdust respectively. The preponderance of alkanes and methyl group inmaize husk makes it to produce biogas compared to saw dust as shown by the Fourier transform infrared spectroscopy (FTIR) that was carried out to identify the various functional groups. The potential of maize husk to produced biogas was also established. The kinetic modeling shows that there was an increase in biogas yield as the retention time increases as depicted by the linear model.
Do We Need Dark Energy to Explain the Cosmological Acceleration?  [PDF]
Felix M. Lev
Journal of Modern Physics (JMP) , 2012, DOI: 10.4236/jmp.2012.329153
Abstract: The phenomenon of the cosmological acceleration discovered in 1998 is usually explained as a manifestation of a hypothetical field called dark energy which is believed to contain more than 70% of the energy of the Universe. This explanation is based on the assumption that empty space-time background should be flat and hence a nonzero curvature of the background is a manifestation of a hidden matter. We argue that quantum theory should proceed not from space-time background but from a symmetry algebra. Then the cosmological acceleration can be easily and naturally explained from first principles of quantum theory without involving empty space-time background, dark energy and other artificial notions. We do not assume that the reader is an expert in the given field and the content of the paper can be understood by a wide audience of physicists.
Great Expectations—Narratives and the Elicitation of Aesthetic Chills  [PDF]
Felix Schoeller, Leonid Perlovsky
Psychology (PSYCH) , 2015, DOI: 10.4236/psych.2015.616205
Abstract: We clarify the relation between the perception of narratives and aesthetic emotions by relating them to mechanisms of knowledge-acquisition. Stories elicit emotions by diverging from expectations one may formulate on the basis of their properties. The greater the divergence, the stronger the emotion. Models of emotions, expectations, and knowledge-acquisition are briefly presented. We relate them to research pertaining to narrative structures and provide a mathematical description for aesthetic emotions. We conclude by underlining the fundamental role played by aesthetic emotions in the workings of the human mind.
Enforcement of Fundamental Rights in National Constitutions: Resolving the Conflict of Jurisdiction between the Federal High Court and State High Court in Nigeria  [PDF]
Odike Felix, Alero Akujobi
Beijing Law Review (BLR) , 2018, DOI: 10.4236/blr.2018.91004
Abstract: Fundamental human rights are those natural or human rights that are guaranteed to individuals as a citizen of a free and civilized state. They are incorporated in the supreme or basic law of a country as fundamental human rights. This paper examines the conflict of jurisdictions between the federal high court and the state high courts in the enforcement of fundamental human rights with particular emphasis on how the Nigerian case law has contributed to the confusion. To resolve the issue, the paper surveyed the position of enforcement of fundamental human rights in few other common law jurisdictions such as India, Pakistan and Ghana, and concluded that in Nigeria, the federal high court only has jurisdiction to enforce fundamental human rights arising from a cause of action that falls within its limited exclusive jurisdiction.
Creativity and Culture: Nigerian Conceptions  [PDF]
Felix-Kingsley Obialo
Creative Education (CE) , 2018, DOI: 10.4236/ce.2018.916215
Abstract: Creativity is an inevitable phenomenon resulting in people’s need to solve their problems. This phenomenon is captured differently by each culture’s values and beliefs. Though Western conceptions of creativity dominate literature with an impressive contribution from Eastern cultural conceptions, African conceptions of creativity seem to be obscure. This article uses the three dominant Nigerian cultures namely Hausa, Igbo and Yoruba to underscore the relationship between culture and creativity. It contends that any concept of creativity is reflective of a people’s cultural viewpoint. While communal and religious interpretations of the association are traditionally Nigerian, there is, however, a contemporary dimension to the Nigerian concept of creativity which is also Western in outlook. The result is an amalgam of the traditional Nigerian and Western conceptions of creativity in one socio-cultural setting called Nigeria. However, the fusion of these two cultural concepts does not rob the traditional Nigerian notions of creativity the enduring traits of what other cultures understand to be creative. Consequently, if the various cultural understandings of creativity have all led to growth and development in their different cultural settings, it behooves multiple stakeholders of the Nigerian society the duty and responsibility of promoting the prevailing conceptions of creativity from their cultural backdrop for the growth and development of the Nigerian experience.
Pro-Inflammatory Cytokines (TNF-α and IL-1) in Nigerian Women with Breast Cancer  [PDF]
Chukwurah Ejike Felix, Iyare Festus Ehigiator, Chukwurah Felix Chinedum
Open Journal of Immunology (OJI) , 2018, DOI: 10.4236/oji.2018.82002
Abstract:

Background: Breast cancer remains an important medical challenge, despite sustained global efforts at its prevention and control. Various immunological factors are expressed in the serum during breast tumourigenesis, and can be of value in the surveillance of the disease. These serum bio-markers include pro-inflammatory cytokines since breast cancer is associated with chronic inflammation. In our locality with different racial/ethnic variations from Caucasian as well as environmental factors, there is scanty information on the value of these serum factors in screening and surveillance of breast cancer—hence the need for this study. Methodology: A total of 68 females (mean age = 48.7 ± 8.7 yrs) with clinically and pathologically confirmed breast cancer were recruited by self selection; representing breast cancer patients group. Due to small sample size they were further grouped into advanced stage breast cancer cases (N = 40) and early stage breast cancer cases (N = 28). Controls consisted of two groups: A—Patient control group (N = 21) comprised females with benign breast tumour (15 cases with fibroadenoma and 6 cases with fibrocystic disease) and group B—apparently healthy age/sex matched control group (N = 21). Pre-treatment samples

Serum Immunoglobulins (IgG, IgM and IgA) in Nigerian Women with Breast Cancer  [PDF]
Chukwurah Ejike Felix, Ogbodo Sylvester Ogbonna, Chukwurah Felix Chinedum
Open Journal of Immunology (OJI) , 2018, DOI: 10.4236/oji.2018.83005
Abstract: Background: Breast cancer remains intractable and the leading cause of cancer related death among women. The appearance of breast tumour and its progression poses great clinical unpredictability before and after diagnosis, therapy and appearance of recurrent secondary deposits. Various immunological changes occur during breast tumourigenesis, and can be of value in the surveillance of the diseases. In our environment, there is scanty information on the value of these immunological factors especially immunoglobulins in screening and surveillance of breast cancer—hence the need for this study. Methodology: A total of 59 females (mean age = 48.7 ± 8.7 yrs) with clinically and pathologically confirmed breast cancer were prospectively recruited alongside with 20 patients with benign breast tumour representing patients’ control group and 20 apparently healthy age and sex-matched control subjects (mean age = 47.5 ± 13.4 yrs). Breast cancer patients were further grouped into early stage breast cancer (N = 25) and advanced stage breast cancer (N = 34). Patients were subjected to standard treatment modalities and pre- and post-treatment samples collected at intervals. Samples were assayed for IgG & IgM by immunoenzymatic methods and IgA by immunoturbidimetric method. Questionnaires and measurements were used to obtain necessary demographic and anthropologic information from the subjects. Results: Results showed that in all stages of breast cancer and treatment groups, the mean serum IgG, IgM and IgA levels respectively were not significantly raised (P > 0.05) when compared. Results also showed that majority (59%) of the patients presented at advanced stage of the disease. Low level of education and low income were among the prevailing risk factors. Majority (63%) of the cases had body mass index suggesting obesity (>30 kg/m2). Conclusion: Results suggest that serum immunoglobulin (IgG, IgM and IgA) levels are of limited value in surveillance of breast cancer in our environment. Based on our findings, it could also be concluded that low levels of education and low income are among the risk factors. Advocacy and evidence based policies aimed at prevention and early detection of the disease should be prioritized.
Risk Assessment of Trace Metals in Soils in the Vicinity of NPA Expressway Open Dump in Warri Metropolis, Delta State, Nigeria  [PDF]
Helen Ataikiru, Felix E. Okieimen
Journal of Environmental Protection (JEP) , 2019, DOI: 10.4236/jep.2019.104032
Abstract: Heavy metals are non-biodegradable. They accumulate in the environment and subsequently contaminate the food chain. It is therefore essential to monitor heavy metals content in the soil, so as to prevent too much accumulation in human beings and animals through food chain. Test soil samples were collected from Nigeria Ports Authority (NPA) Expressway open dump, and background (control) soil samples were also collected at about 2 km from the open dump and spatial test samples were also collected. The physicochemical properties of the soil were determined. Tessier’s sequential extraction protocols were used to assess the geochemical forms of Cr, Pb, Zn, and Mn in the soil of the open dump. The concentrations of the heavy metals in the extracts were determined in a pre-calibrated atomic absorption spectrophotometer and they are above the background sample values. The metal assessment index (Igeo) evaluated, indicated that the soil in the vicinity of the open dump was highly polluted. The results obtained showed the mobile metal pools which are available to plants roots.
In-Medium Effects in the Holographic Quark-Gluon Plasma
Felix Rust
Advances in High Energy Physics , 2010, DOI: 10.1155/2010/564624
Abstract: We use the gauge/gravity duality to investigate various properties of strongly coupled gauge theories, which we interpret as models for the quark-gluon plasma (QGP). In particular, we use variants of the D3/D7 setup as an implementation of the top-down approach of connecting string theory with phenomenologically relevant gauge theories. We focus on the effects of finite temperature and finite density on fundamental matter in the holographic quark-gluon plasma, which we model as the =2 hypermultiplet in addition to the =4 gauge multiplet of supersymmetric Yang-Mills theory. We use a setup in which we can describe the holographic plasma at finite temperature and either baryon or isospin density and investigate the properties of the system from three different viewpoints. (i) We study meson spectra. Our observations at finite temperature and particle density are in qualitative agreement with phenomenological models and experimental observations. They agree with previous publications in the according limits. (ii) We study the temperature and density dependence of transport properties of fundamental matter in the QGP. In particular, we obtain diffusion coefficients. Furthermore, in a kinetic model we estimate the effects of the coupling strength on meson diffusion and therewith equilibration processes in the QGP. (iii) We observe the effects of finite temperature and density on the phase structure of fundamental matter in the holographic QGP. We trace out the phase transition lines of different phases in the phase diagram.
Investigating health system performance: An application of data envelopment analysis to Zambian hospitals
Felix Masiye
BMC Health Services Research , 2007, DOI: 10.1186/1472-6963-7-58
Abstract: Efficiency is measured using a DEA model. Vectors of hospital inputs and outputs, representing hospital expended resources and output profiles respectively, were specified and measured. The data were gathered from a sample of 30 hospitals throughout Zambia. The model estimates an efficiency score for each hospital. A decomposition of technical efficiency into scale and congestion is also provided.Results show that overall Zambian hospitals are operating at 67% level of efficiency, implying that significant resources are being wasted. Only 40% of hospitals were efficient in relative terms. The study further reveals that the size of hospitals is a major source of inefficiency. Input congestion is also found to be a source of hospital inefficiency.This study has demonstrated that inefficiency of resource use in hospitals is significant. Policy attention is drawn to unsuitable hospital scale of operation and low productivity of some inputs as factors that reinforce each other to make Zambian hospitals technically inefficient at producing and delivering services. It is argued that such evidence of substantial inefficiency would undermine Zambia's prospects of achieving its health goals.Zambia's health system is poised for a major challenge of executing an ambitious health programme designed towards improving health service delivery and meeting its health-related Millennium Development Goals (MDGs). In 2006, the Ministry of Health (MOH) announced an ambitious national plan to scale-up a range of interventions for fighting the Zambia's leading health problems [1]. Public expectations are high and Zambia continues to receive significant resources from various donors and development agencies to support its health programme. By 2006, the Global Fund for AIDS, Tuberculosis and Malaria (GFATM) alone had given about US$120 million [2]. More resources are likely to be available through the Highly-Indebted Poor Country (HIPC) initiative. These resources will continue to enhance Za
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