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Search Results: 1 - 10 of 217 matches for " Issoufou Yahaya "
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Boko Haram” In Nigeria: Religious Fanaticism As A Political Project
Issoufou Yahaya
Sfera Politicii , 2011,
Abstract: Depuis le 11 septembre 2001, l’expression de la violence islamiste a pris un nouveau tournant. Bandits pour les uns, vaillants pour les autres, ces prosélytes se servent de la barbarie à des fins politiques avec un sens de l’imagination hardi. En Afrique subsaharienne, on vit une de violence interreligieuse et intercommunautaire au quotidien comme c’est souvent le cas au Nigéria. Dans ce pays de cent cinquante millions d’habitants, l’irruption tragique en juillet 2009 de la secte Boko Haram , avec son lot de cruauté contre les symboles de l’état, demeure dans les esprits, dans ce pays pourtant riche mais où la manne pétrolière est confisquée par une poignée de bienheureux . L’écrasante majorité de la population vit ici dans la misère et n’a d’autre recours que le repli communautaire et confessionnel insidieux et périlleux qui revêt une dimension politique.
Influence of Re-Greening on the Infiltrability of Soils in South-Central Niger  [PDF]
Adamou Mahaman Moustapha, Issoufou Baggnian, Nazoumou Yahaya, Toudou Adam
Journal of Water Resource and Protection (JWARP) , 2014, DOI: 10.4236/jwarp.2014.619155
Abstract: In the Sahel, the climate and the agricultural practices are the main factors used to observe regreening process. But the extension of the latter not being uniform in the farming fields, we can suppose that there are other factors that contribute to the re-greening of certain zones and not others. The infiltrability of soils is considered as an important factor for these changes in the last decades. The influence of re-greening on the infiltrability of soils in the southern strip of Niger was studied through a comparison of zones according to the type of sandy soils (Jigawa/Rerey), siltyclay (Guiéza), silty-sandy (Hako) and clay-silty-sandy (Laka). The evaluated parameters are the texture, the infiltrability and the ecological characteristics (specific index of regeneration “SIR” and the Importance Value Index “IVI”). The main conclusions were: the soils of Niger South-Central are characterized by a sandy texture for more than 80%. The soils which are very sandy (“Jigawa”, “Rerey” and “Guieza”) are more permeable and have more trees contrary to the soil Hako and Laka. Their encrusting has the tendency to reduce the vegetation cover on the soil. The infiltration measurements indicated that the rate of initial and stationary infiltration diminishes while going down towards the South. In fact, it has been recorded a rate of 123 mm/min of initial infiltration and 87 mm/min stationary in Dan Saga on the sandy soils against 76 mm/min and 65 mm/min in Daré respectively for the initial and stationary rate. Therefore, the infiltration seems to influence the density, the SIR and the IVI of the trees from the North towards the South. Some additional work is necessary in order to determine the contribution of Farmer Managed Natural Regeneration (FMNR) in the improvement of the quality of soils and the movement of water in the superficial zones of the soil.
Inventory, Geographical Distribution of Caryedon Species in Burkina Faso, and Evaluation of Their Impact on Stored Groundnut  [PDF]
Issoufou Ouedraogo, Mbacke Sembene, Dona Dakouo
Advances in Entomology (AE) , 2017, DOI: 10.4236/ae.2017.52005
Abstract: To understand the mechanism of infestation of stored groundnut in farming areas, studies on the inventory and geographical distribution of Caryedon species were carried out in the tree savannah and in producers’ storage structures. The incidence of C. serratus in stored groundnut was evaluated. Inventory and geographical distribution of insects belonging to Caryedon genus was achieved through a sampling in the savannah and producers’ granaries. The inventory and geographical distribution of insects was made throughout Burkina Faso whereas the evaluation of the perforations of groundnut pods was made in the western zone of the country. The results of the inventory showed the presence of two species belonging to Caryedon genus which are C. serratus and C. crampelii. These species are found on the agro-ecological zones of the country. The survival and maintenance of Caryedon species genus are ensured by the presence of plants belonging to various families such as Caesalpiniceae and Mimosaceae. The evaluation of the losses caused by C. serratus in producer’s stored groundnut revealed that the pods perforation rate varied according to the locality. In?Toussiana, the rate of perforated pods ranged from 53.72% to 100% in five months while in?Karangasso Sembla, for the same conservation time, the rate was in the range from 2.8% to 35%. However it is C. serratus which is responsible for the losses observed in the stored groundnut. Indeed, in the western area of Burkina Faso where more than 25% of the production is realized, 70% of
Numerical Modelling and Simulation of Sand Dune Formation in an Incompressible Out-Flow  [PDF]
Yahaya Mahamane Nouri, Saley Bisso
Applied Mathematics (AM) , 2015, DOI: 10.4236/am.2015.65080
Abstract: In this paper, we are concerned with computation of a mathematical model of sand dune formation in a water of surface to incompressible out-flows in two space dimensions by using Chebyshev projection scheme. The mathematical model is formulate by coupling Navier-Stokes equations for the incompressible out-flows in 2D fluid domain and Prigozhin’s equation which describes the dynamic of sand dune in strong parameterized domain in such a way which is a subset of the fluid domain. In order to verify consistency of our approach, a relevant test problem is considered which will be compared with the numerical results given by our method.
The Relationship of Self-Concept And Communication Skills Towards Academic Achievement Among Secondary School Students In Johor Bahru
Azizi Yahaya
International Journal of Psychological Studies , 2009, DOI: 10.5539/ijps.v1n2p25
Abstract: ABSTRACT: The purpose of this study is to examine the relationship of self-concept and interpersonal communication skills to academic achievement. 320 students from eight schools in Johor Bahru were picked at random using the simple random method. The assessment instruments used in this study were the “Tennessee Self-Concept Scale” (TCS) and the Malay version of “Interpersonal Communication Skills Inventory” (ICSI). The reliability level of the assessment instruments was 0.7498(TSCS) and 0.7587 from the pilot study done on a group of twenty respondents. The data was analyzed using the Pearson’s correlation and descriptive statistics. The students’ levels of self-concept and interpersonal communication skills were identified. The levels of students’ self-concept were positive, average or negative while the student’s interpersonal skills were high, average or low. The students’ PMR examination results were used as the academic achievement indicator. The results indicated that the majority of the students possessed the average level of self-concept and interpersonal communication skills. Self-concept was found to correlate quite significantly with interpersonal communication skills but it was found that self-concept does not correlate significantly with academic achievement. Suggestions were put forth to improve the students’ interpersonal communication skills and their self-concept. One of the suggestions is that communication skills should be introduced as a subject in the school curriculum from the primary level. This will not only develop a student’s self-confidence but also enhance his self-concept. (Keyword: self-concept, interpersonal, communication skills and academic achievement)
Application of resistant starch in bread: processing, proximate composition and sensory quality of functional bread products from wheat flour and African locust bean (Parkia biglobosa) flour  [PDF]
Abdoulaye Sankhon, Issoufou Amadou, Wei-Rong Yao
Agricultural Sciences (AS) , 2013, DOI: 10.4236/as.2013.45B023
Abstract:

Application of resistant starch prepared from parkia flour was produced by replacement of wheat flour with 0, 5%, 10%, 15%, 20%, 30% and 40% Parkia flour. Processing, proximate composition, digestibility of resistant starch in bread and sensory quality were evaluated. Resistant starch was significantly (p < 0.05) increased as Parkia flour level increase in all breads. The resistant starch prepared from Parkia flour was 47.21%. However, wheat bread was 1.47% and Parkia bread 18.52% to 22.28% baked of (200℃ at 45 min) with 2.16% wheat bread and 31.74% to 35.05% Parkia bread baked of (130℃ at 90 min). Supplementation of wheat flour with Parkia flour 0 - 40% increased the crude protein content significantly (p < 0.05) from (7.89% - 15.68%), ash from (0.91% - 2.54%) and crude fiber (1.41% - 4.97%). Color of the bread treatments was remarkably affected by addition of different levels of Parkia flour. Therefore, Parkia flour could be added to wheat flour up to 15% without any observed detrimental effect on bread sensory properties. Sensory evaluation results indicated that bread with 5% to15% Parkia flour were rated the most acceptable and there was no significant difference in terms of acceptability compared to the control. This could be used to improve the nutritional quality of bread especially in developing countries were malnutrition is prevalent.

Influence of Host Plants on the Development of Caryedon serratus Olivier (Coleoptera: Chrysomelidae, Bruchinae), Insect Pest of Groundnut Stocks in Burkina Faso  [PDF]
Issoufou Ouedraogo, Sacamba Aimé Omer Hema, Wendgoundi Guenda, Dona Dakouo
Advances in Entomology (AE) , 2016, DOI: 10.4236/ae.2016.45029
Abstract:
The beetle Caryedon serratusOlivier is a major insect pest responsible for the infesta-tion and damage on groundnut during storage. To understand the infestation mecha-nism of groundnut stocks, studies have been carried out on this insect biology under laboratory conditions in relation with its host plants. The results have demonstrated that the pre-oviposition on groundnut lasts on average 1.28 days. The oviposition pe-riod is 12.04 days, during which 80.42 eggs on average are laid. From hatching to adult stage, C. serratus larvae development goes through four stages with variable durations according to the stage. Three families of host plants (Papilionaceae; Caesalpiniaceae and Mimosaceae) were selected for females C. serratusto lay on their seeds. The re-sults showed that more eggs were laid on the seeds of Papilionaceae (98.75% of in-fested seeds) followed by Caesalpiniaceae (28.59% of infested seeds). Studies were carried out on the laying behavior of C. serratus under laboratory conditions and have revealed that whatever the conditions, C. serratus?females lay on all the plant species seeds exposed. Insects’ development duration has varied according to the plant species seeds used.
Characterization and Potential Recovery of Household Solid Waste in the City of Ouagadougou (Burkina Faso)  [PDF]
Kayaba Haro, Issoufou Ouarma, Bernard Nana, Antoine Bere, Jean Koulidiati
Journal of Environmental Protection (JEP) , 2018, DOI: 10.4236/jep.2018.94021
Abstract: This study on physical and physicochemical characteristics of household solid waste (HSW) in the city of Ouagadougou by using MODECOM, “Method of Characterization of Household waste” was done fifteen (15) years after the first study. Special attention has been paid to waste sampled and also to estimate energy content, namely the higher heating value (HHV) and the lower heating value (LHV). As a general tendency, the results showed a sensitive evolution in the physical parameters of waste (composition by size and composition by category) and also in the physicochemical parameters (moisture content and energy content). The results of HSW composition study showed that regardless the seasons, fermentable fraction is dominant (39% in the rainy season and 20% in the dry season) followed by plastics (18% in the rainy season and 20% in the dry season). The moisture content is measured to be 56.69% and 37.69% respectively in the rainy season and dry season. The results analysis of the potential of recovery showed that the organic recovery is more important (60% in the rainy season and 55% in the dry season) than the matter recovery (43% in the rainy season and 46% in the dry season). These results highlight the need for organic recovery and matter recovery of HSW in the city of Ouagadougou. The results from the analysis of the energy content showed that the HHV is estimated to be 17.94 MJ/kg in the rainy season and 17.96 MJ/kg in the dry season. The LHV is calculated to be 6.38 MJ/kg in the rainy season and 10.27 MJ/kg in the dry season. These results suggest that incineration as treatment of HSW in the city of Ouagadougou is not economically an appropriate option.
Study of Lightning Safety Distance Using Rolling Sphere Method  [PDF]
Nor Zaihar Yahaya, Mohd Akhmal Daud
Energy and Power Engineering (EPE) , 2013, DOI: 10.4236/epe.2013.53026
Abstract:

The development of a computer program for evaluation of lightning safety distance between the tower and satellite dish is written in M-File MATLAB. The 3-dimensional illustrative graphics model is used to capture better understanding on how lightning protection system (LPS) works. The study of physical length of grounding electrode used on the tower is found to be significantly affecting the grounding system performances where they depend on magnitude of dispersed lightning strikes current and the settling time for the current to completely disperse. The grounding system performance is studied by using lightning impulse current (LIC) generator, simulated in OrCad PSpice software. It is found that the optimum length of vertical lightning rod in LPS is the same with the striking distance. There is no significant improvement is observed in lightning safety distance if the length of vertical lightning rod is higher than striking distance. The lightning strike peak current that has larger magnitude than the withstanding insulation level of specified object causes no physical damage. It is because the lightning safety distance increases when the lightning strike peak current becomes higher. It is also found that the lower grounding impedance generates higher magnitude of dispersed peak current and faster settling time.

Modelling of Potential Pipeline Impact Radius and High Consequence Area in a Wetland Sub-Region of Nigeria  [PDF]
Shittu Whanda, Yahaya Sani, Gadiga Bulus
Journal of Geographic Information System (JGIS) , 2015, DOI: 10.4236/jgis.2015.76056
Abstract: Crude oil transportation through pipelines presents danger to communities along its path. In the Niger Delta region of Nigeria for instance, pipeline vandalism occurs indiscriminately and regularly, such that every segment of a pipeline network becomes a potential target and possibly source of oil spill hazard. In terms of pipeline hazard and risk distribution, the oil plume’s ability to migrate freely in wetlands and encroachment on pipeline right of ways by people increases chances of wider contact and exposure opportunities to inhabitants and the environment. Despite several efforts to mitigate pipeline hazards in the oil and gas sector, none has been effective in Nigeria partly due to paucity of data in public domain and poor public participation. Therefore considering the environmental and human health challenges associated with oil spills, an alternative method was developed using multi-criteria decision analysis to model 1) pipeline hazard zones, 2) potential pipeline impact radius, and 3) high consequence areas with four attribute layers, i.e. land cover, population, river and pipeline to encourage public participation. The model identified land use areas, communities and rivers likely to be susceptible to pipeline hazards and areas requiring regular monitoring and possible intervention. Meanwhile the model sensitivity test indicated that the river layer was most sensitive, while transferability was limited to similar criteria variables. The model can stimulate public participation in pipeline hazard management while policy makers and regulators would find it relevant in oil spill impact mitigation.
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