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Search Results: 1 - 10 of 4458 matches for " Ibrahim Ibrahim Yahuza Yerima "
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Statistical Variation of Physico-Chemical Properties of Shallow Wells Used for Agricultural Activities in an Agrarian Community, North Central Nigeria  [PDF]
John Jiya Musa, Martins Yusuf Otache, Elijah TsadoMusa, Michael Eneojo Omale, Ibrahim Ibrahim Yahuza Yerima
Open Access Library Journal (OALib Journal) , 2019, DOI: 10.4236/oalib.1105683
Abstract:
Water quality is gradually falling due to human activities, thus making clean water for both domestic and agricultural activities scarce. Population growth is expected to directly or indirectly move up from its current status by about 55%, thus increasing water stress or severe water scarcity over the next generation. This study is aimed at statistically ascertaining and determining the physico-chemical properties of some hand-dug wells in Niykangbe, an agrarian community in Nigeria. A total of twenty five samples were collected for each year during the dry season for a period of three years. Replicate samples were collected on monthly bases for a period of five months during the years 2014, 2015 and 2016. The results obtained indicated that aluminum, cyanide and manganese were not present in the water samples. The pH ranged between 7.10 and 7.70, electric conductivity ranged between 157 and 467 μs/cm and the temperature ranged between 30℃ and 33℃. The nitrate content ranged between 5.00 and 67.30 mg/l while nitrite ranged between 0.02 and 0.09 mg/l. The analysis should be that most of the parameters were still within the recommended standards of NSDWQ and WHO. It was concluded that intermittent test is carried out to ascertain the level of fitness of the various water samples for both domestic and agricultural use.
Review of some methods of calculating intercrop efficiencies with particular reference to the estimates of intercrop benefits in wheat/faba bean system.
Ibrahim Yahuza
International Journal of Biosciences , 2011,
Abstract: Intercropping (growing two or more crops together simultaneously) is increasing being adopted worldwide, probably because there have been suggestions that the system is beneficial in terms of land use efficiency compared to sole cropping. There are several indices for estimating intercrop performance compared to the component sole crops, but as reviewed in this paper, the land equivalent ratio (LER) is the most widely adopted. Yet the LER is constrained because it is not able to account for the relative duration each component in the intercrop spent in the field may have had on intercropping performance. Area time equivalency ratio (ATER) appears to have solved this problem well. However, neither ATER nor LER can account for the physiological or physical basis for the intercropping performance. The crop performance ratio (CPR) is more appropriate in this regard, even though CPR ‘adjusted for time’, (CPRT) is more efficient where the component crops differ in growth duration. In addition, particularly for intercrops with commercial value, there may be a need to compute a monetary advantage (MA) for intercropping. This paper concludes that in addition to the LER, for certain intercrops such as wheat/faba bean system that has not been widely adopted, there may be a need to use other indices such as ATER, CPR, CPRT and MA as may be applicable in order to understand more fully the nature of intercrop benefits that may exist. Indeed such type of information may help to attract potential growers.
Yield-densityequations and their application for agronomic research: a review.
Ibrahim Yahuza
International Journal of Biosciences , 2011,
Abstract: Plant population density (density) trials are time consuming, repetitive and cost intensive. The literatures indicate that density trials are more effectively and efficiently described when meaningful yield-density equations such as reciprocal linear and/or parabolic equations are applied to quantify data. Several of these types of equations and their derivatives such as competitive indices have been proposed. It is generally agreed that where response to density deviated from linearity, equations based on linear reciprocal of yield per plant and density can satisfactorily describe an asymptotic response. In certain cases when the harvest index is substantially affected by density and/or due to unfavourable growth conditions, equations that assumed parabolic responses may be more valid. The review by Willey and Heath (1969) on the quantitative response of yield to density appears to have remained a useful resource up to date. However, more recently, several investigations based on reciprocal quantitative relationships between yields and density and how this may be influenced by other agronomic practices were carried out. Yet, most of these substantial knowledge and progress on yield-density investigations appear to be scattered in published or unpublished works as no attempt has been made to collate them together. This paper reviews more recent progress on yield-density equations research and their application, and highlights needs for the applications of some of these equations for agronomic research with more emphasis given to intercropping.
Research on the prevalence of conduct disorders among primary school pupils in Khartoum-Sudan  [PDF]
Ibrahim Abdelrahim Ibrahim Humaida
Health (Health) , 2012, DOI: 10.4236/health.2012.43020
Abstract: The aim of this research was to investigate conduct disorder among pupils of primary schools in Khartoum, the capital of Sudan. School survey descriptive method was used and 384 pupils were selected from primary schools through systematic sampling technique. Age ranged from 5 to 17 years old with a mean of (9.34) years. The tools of data collection consisted of the Sutter-Eyberg Student Behavior Inventory. The statis-tical tests used to analyze the collected data involve frequency and percentage, Pearson co-efficient of correlation, mean, t-test for one sample and t-test for two independent samples. The results of this research revealed that that the prevalence of conduct disorder among pupils of primary schools in Khartoum was low. There were significant differences in conduct disorder between male and females pupils. There were no significant differences between pupils of pre-paratory classes and pupils of elementary classes. There was no significant correlation between conduct disorder and age.
Periodicity and Solution of Rational Recurrence Relation of Order Six  [PDF]
Tarek F. Ibrahim Ibrahim
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.37107
Abstract: Difference equations or discrete dynamical systems is diverse field whose impact almost every branch of pure and ap- plied mathematics. Every dynamical system an+1=f(an) determines a difference equation and vise versa. We ob-tain in this paper the solution and periodicity of the following difference equation. xn+1=(xnxn-2xn-4)/(xn-1xn-3xn-5, (1) n=0,1,... where the initial conditions x-5,x-4,x-3,x-2,x-1 and x0 are arbitrary real numbers with x-1,x-3 and x-5 not equal to be zero. On the other hand, we will study the local stability of the solutions of Equation (1). Moreover, we give graphically the behavior of some numerical examples for this difference equation with some initial conditions.
Relationship between Stress and Psychosomatic Complaints among Nurses in Tabarjal Hospital  [PDF]
Ibrahim Abdelrahim Ibrahim Humaida
Open Journal of Medical Psychology (OJMP) , 2012, DOI: 10.4236/ojmp.2012.13003
Abstract: This research was conducted to examine the relationship between stress and psychosomatic complaints among nurses in Tabarjal hospital. To achieve this aim, the researcher used the descriptive method and selected a sample consisting of (56) nurses working in hospital through the simple random sampling technique. The respondents were requested to complete a questionnaire for rating of stress and the most common psychosomatic diseases. The collected data were analyzed statistically by using SPSS. The results revealed that the stress was dominant among nurses in Tabarjal hospital, the prevalence of psychosomatic complaints was significantly higher in nurses, and there was significant correlation between stress and psychosomatic complaints among nurses. Conclusion: This research confirmed the effect of strains on the prevalence of psychosomatic symptoms among nurses in Tabarjal hospital. Further, implications of the results were discussed on the light of some related researches.
Analysis of Electrical Characteristics of Photovoltaic Single Crystal Silicon Solar Cells at Outdoor Measurements  [PDF]
A. Ibrahim
Smart Grid and Renewable Energy (SGRE) , 2011, DOI: 10.4236/sgre.2011.22020
Abstract: The electrical performance of a photovoltaic (PV) silicon solar cell is described by its current–voltage (I–V) character-istic curve, which is in turn determined by device and material properties. In this study, an investigation of the performance and device parameters of photovoltaic single crystalline silicon (Si.) solar cell of the construction n+pp++ PESC(Passivatted Emitter Solar Cell) at different conditions of solar irradiance, title angle and mirror boosting effects had been studied. Also the paper reports on the performance data of the Si. cell, using standard I–V characteristic curves to obtain output parameters and to show that there are possible performance degrading defects presents.
The Influence of Memetic Primers in Online Comments in Video Game Blogs  [PDF]
Ibrahim Yucel
Advances in Internet of Things (AIT) , 2012, DOI: 10.4236/ait.2012.23008
Abstract: Through investigating a particular blog, several factors were found which have significant influence on reader actions. This study uses the term “memetic primers” for those styles that most often cause readers to take notice of a particular comment, remember information included in it, and take action. The memetic primers were derived in a discourse analysis. The study discovered the memetic primers using logic-of-inquire approach to the online comments. While evidence indicated that the usefulness of some primers was low, it emerged those negatively written comments where the most common impact on a comment’s volume.
Localisation Inverse Problem and Dirichlet-to-Neumann Operator for Absorbing Laplacian Transport  [PDF]
Ibrahim Baydoun
Journal of Modern Physics (JMP) , 2013, DOI: 10.4236/jmp.2013.46106
Abstract:

We study Laplacian transport by the Dirichlet-to-Neumann formalism in isotropic media (γ = I). Our main results concern the solution of the localisation inverse problem of absorbing domains and its relative Dirichlet-to-Neumann operator \"\" . In this paper, we define explicitly operator \"\", and we show that Green-Ostrogradski theorem is adopted to this type of problem in three dimensional case.

Localisation Inverse Problem of Absorbing Laplacian Transport  [PDF]
Ibrahim Baydoun
Journal of Modern Physics (JMP) , 2013, DOI: 10.4236/jmp.2013.45080
Abstract:

We study the localisation inverse problem corresponding to Laplacian transport of absorbing cell. Our main goal is to find sufficient Dirichelet-to-Neumann conditions insuring that this inverse problem is uniquely soluble. In this paper, we show that the conformal mapping technique is adopted to this type of problem in the two dimensional case.

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