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匹配条件: “ Umar Abdullahi” ,找到相关结果约846条。
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On the Construction of Even Order Magic Squares
Abdullahi Umar
Mathematics , 2012,
Abstract: The aim of this note is to introduce a fast new general method for the construction of double and single even order magic squares. The method for double even order magic squares is fairly straight-forward but some adjustment is necessary for single even order magic squares.
On the semigroup of partial isometries of a finite chain
Rotimi Kehinde,Abdullahi Umar
Mathematics , 2010,
Abstract: Let ${\cal I}_n$ be the symmetric inverse semigroup on $X_n = \{1, 2,..., n\}$ and let ${\cal DP}_n$ and ${\cal ODP}_n$ be its subsemigroups of partial isometries and of order-preserving partial isometries of $X_n$, respectively. In this paper we investigate the cycle structure of a partial isometry and characterize the Green's relations on ${\cal DP}_n$ and ${\cal ODP}_n$. We show that ${\cal ODP}_n$ is a $0-E-unitary$ inverse semigroup. We also investigate the cardinalities of some equivalences on ${\cal DP}_n$ and ${\cal ODP}_n$ which lead naturally to obtaining the order of the semigroups.
Assessment of Vegetation Productivity in the Northern Part of Nigeria  [PDF]
Sadiq Abdullahi Yelwa, Umar Usman
American Journal of Climate Change (AJCC) , 2017, DOI: 10.4236/ajcc.2017.62018
Abstract: Climate change is one of the greatest threats facing the global community and has been mainly induced by increasing atmospheric concentrations of greenhouse gases resulting from fossil fuel energy use and change in vegetation cover. This study used modelling techniques to determine how changes in climate could affect vegetation productivity in the northern part of Nigeria. Climatic parameters (Rainfall, Minimum and Maximum Temperatures) as well as coarse Normalised Difference Vegetation Index (NDVI) data for the growing seasons of 1981-2009 were utilised. Because of the relationship between climatic parameters and vegetation, Spatial method of data interpolation was tested. Results from the prediction elevation values ranged from -3e-9 to 2e-9. It was observed from prediction variance map that the values were higher in the upper portion of the study area which comprised Gusau (GS), Jos (JS), Katsina (KT), Minna (MN) and Zaria (ZR) and lower in the middle and lower parts of the study area which comprised mainly Funtua, Kano, Maiduguri and Sokoto. Further studies are encouraged with high resolution imageries and more meteorological data to cover the montane and forest zone of the country to determine the level of climatic impacts particularly on vegetation productivity in general.
Assessment of Factors Influencing Beneficiary Participation in Fadama II Project in Niger State, Nigeria
HU Muhammad, BF Umar, BZ Abubakar, AS Abdullahi
Nigerian Journal of Basic and Applied Sciences , 2011,
Abstract: The paper investigated factors influencing beneficiary participation in Fadama II project in Niger State. Three LGAs out of eleven LGAs that benefited in Fadama II project were randomly selected for the study. To this end, one Fadama Community Association (FCA) and five Fadama User Groups (FUGs) were randomly selected from each LGA that benefited. Five beneficiaries were also randomly sampled from each FUG. Seventy five (75) beneficiaries were randomly sampled for the study. Descriptive statistics and logit regression model were used to analyze the data collected. However, large proportion of the beneficiaries participated in problem identification (69.3%) and project implementation (80%) in the stages of project development. Women participation in Fadama II project was identified to be low (28.0%). Meanwhile, educational level and membership of cooperative society significantly influenced participation (P < 0.01). Household size was a positive factor that significantly influenced participation (P < 0.05) in Fadama II project in the study area.
Religion and the New Roles of Youth in Sub-Saharan Africa: The Hausa and Ebira Muslim Communities in Northern Nigeria, 1930s-1980s
Mukhtar Umar Bunza,Abdullahi Musa Ashafa
Journal for the Study of Religions and Ideologies , 2011,
Abstract: This paper is a comparative study of two northern Nigerian Muslim societies (the Ebira in central Nigeria and the Hausa in the North-west) in which the youths contested religious traditionalists in the 20th century and in the process brought about transformation in their societies. In the religious sphere, which was hitherto considered an affair of the elderly, the youth have equally come to assume a dominant place, especially in their assertive activist posture. In these two case studies, the youths have managed to assume leadership in religion and subsequently have used religion to transform and redefine their roles and status in the societies in a manner that challenged the existing norms. That could be seen as a tradition in the religious convention of the northern Nigerian area that occurs repeatedly through this period. In the 19th century, the Shehu Usmanu Danfodiyo and his cohorts in their youthfulness championed a reform and transformation that continue to inspire other reforms to date in the region. Religious actors in the contemporary Muslim societies of Nigeria are young men and women. It is important to note that these youths are people who possessed both Islamic and Western education and often have international networks and connections, largely through the educational institutions they have attended and/or literature they have studied. Among the Ebira, for instance, the youth subscribed to the religion of Islam, and converted their parents who largely professed African traditional religion to Islam. In Hausaland on the other hand, the youth, unlike the elderly, subscribed to “modern” rather than the “traditional” Islam that the latter do. In both cases therefore, the young engaged the elderly in a struggle to change their conception and practices of Islam. The process has had a tremendous impact on the relationship between the groups in an atmosphere being somehow defined or determined by the young adults in the two northern Nigerian societies being examined.
Knowledge, Attitude and Practice of Physicians in the Treatment of Hypertension in North-Central Nigeria  [PDF]
Umar Gati Adamu, Idogonsit Okon Ibok, Aisha Abdullahi, Isaac Olajide Ogundele, George Alaba Okuku
World Journal of Cardiovascular Diseases (WJCD) , 2014, DOI: 10.4236/wjcd.2014.45033
Abstract: Background and Objectives: Hypertension is a global health hazard and most cases are first attended to by the physicians. Achieving a control will depend on the knowledge, attitude and practice of the physicians. We therefore determined the knowledge, attitude and practices of physicians on the detection and treatment of arterial hypertension in north-central Nigeria. Design and Methods: A cross-sectional study of 100 of the 250 physicians attending a continuing medical education lecture series in Bida was conducted using a pre-validated self administered questionnaire. Results: The mean age of the physicians was 41.05 ± 8.71 years and 59 (73.8%) were males. Forty-one (51.2%) of them have practiced for more than 10 years. Arterial hypertension was considered an important health problem by 93.8% of the physicians, 30% of them believed that it should not be referred to a specialist. Majority of the physicians request for urinalysis (96.2%), electrocardiogram (95.0%), fasting blood glucose (88.8%), blood urea nitrogen (98.8%) and fasting lipid profile (97.5%) to either assess target organ damage or associated co-morbid conditions. Fifty-seven (71.2%) of the physicians prescribe diuretics as the initial drug. However, the knowledge of the other drugs on initiation of therapy of mild uncomplicated hypertension was poor. The sources of information on arterial hypertension by physicians were scientific programs (73.8%), drug companies (38.8%) and journals in 11.3%. Conclusion: The knowledge, attitude and practice of physicians in the detection and management of hypertension were modest. Educative programs like continuing medical education, seminars, and conferences on cardiovascular disorders are advised to be organized regularly to strengthen these and update the physicians.
Hypertrophic Osteoathropathy without Pachyderma in a Nigerian: A Case Report  [PDF]
Adamu G. Umar, Philip B. Adebayo, Abdullahi A., Ibok I. Okon, Umenze Ikenna
World Journal of Cardiovascular Diseases (WJCD) , 2015, DOI: 10.4236/wjcd.2015.56019
Abstract: Hypertrophic osteoathropathy is characterized by triad of digital clubbing, periostosis, and pachyderma. We report the case of a young male Nigerian with asymptomatic idiopathic digital clubbing with neither skin changes nor periosteal reaction. He presented to our hospital with swelling of fingers and toes of about six years’ duration. All his fingers and toes were clubbed with drumstick appearance, no swelling or tenderness of the wrists, elbows, ankles or knees and no skin changes. The laboratory findings were normal. Primary hypertrophic osteoathropathy without pachydermia was entertained when neither skin changes nor periostosis were found. Although primary hypertrophic osteoathropathy without skin involvement is rare, effort should be made to search for secondary causes.
A countable family of finitely presented infinite congruence-free monoids
Alan J. Cain,Victor Maltcev,Abdullahi Umar
Mathematics , 2013,
Abstract: We prove that monoids $\mathrm{Mon}\langle a,b,c,d : a^nb=0, ac=1, db=1, dc=1, dab=1, da^2b=1, \ldots, da^{n-1}b=1\rangle$ are congruence-free for all $n\geq 1$. This provides a new countable family of finitely presented congruence-free monoids, bringing one step closer to understanding the Boone--Higman Conjecture. We also provide examples which show that finitely presented congruence-free monoids may have quadratic Dehn function.
$\mathcal{J}^{\ast}=\mathcal{D}^{\ast}$ need not hold in finite semigroups
Andreas Distler,Victor Maltcev,Abdullahi Umar
Mathematics , 2013,
Abstract: We provide an example of minimum size of a finite semigroup with $\mathcal{J}^{\ast}\neq\mathcal{D}^{\ast}$. We introduce the notion of starred stability and prove that every starred stable semigroup has $\mathcal{J}^{\ast}=\mathcal{D}^{\ast}$.
Health Services Utilization and Health Status of Insured versus Uninsured Nigerian Children with Sickle Cell Disease  [PDF]
Auwal Sani Salihu, Abdullahi Shehu Umar
Health (Health) , 2016, DOI: 10.4236/health.2016.810100
Abstract: Introduction: Nigeria accounts for 150,000 infants born with the Sickle Cell Disease (SCD) every year. Children with SCD are affected by the deleterious effect of user fees which reduces affordability and utilization of health services. Evidences supported that institutionalized health insurance increases intensity of utilization. Methodology: The study was conducted at AKTH, Kano, and north-western, Nigeria. The study was retrospective comparative cross-sectional study. 100 patients were enrolled, 50 for each arm. Paediatric SCD clinic outpatients’ records and a specialty designed form containing the variables of interest were used. Data were analysed using Minitab 16. Proportions, percentages, tables, charts and chi squared test were used to compare the two groups. Result: The study found no association between the two groups in the likelihood of being insured based on age (χ2 = 1.478), gender (χ2 = 0.224) and dwellings (χ2 = 0.062). On health services utilization and insurance status, the study revealed that follow up clinic visits, unscheduled clinic visits and emergency room visits were more likely among the insured group compared to the uninsured group. While the health status and insurance status of the two groups over 12 months period showed a significant association with the insured more likely to have improved health status compared to uninsured (χ2 = 28.019, p = 0.0001). Similarly, health status and health services utilization were significantly associated with insurance status (χ2 = 12.191, p = 0.002). Conclusion: The insurance status of children with SCD is associated with their health services utilization and health status. However, age, gender and dwellings were not associated with insurance status of children with SCD. Therefore, when expanding insurance coverage (NHIS) among children with SCD considerations have to be given to increase health services utilization and resultant improvement in health status as these have the potential of reducing morbidity and mortality among children with SCD.
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