3,471 research outputs found

    Mode NASA blade used to calculate the power generator for (VAWT) by drag and lift coefficients

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    One of the confrontations with increasing demand on power in the entire world the methodologies of provided power divided into traditional methods against renewable methods. This article presents a simulation model to estimate the integrated power from vertical access wind turbine (VAWT) stages of development of a simulation model of local power supply system (LPSS) with (VAWT). However, wind power is one of the quickest developing advances for the sustainable power age. Disturbingly, in the ongoing years a few instances of corruption on telecommunication systems frameworks have emerged because of the presence of wind ranches, and costly and in fact complex restorative estimations needed. The grade of variation of power verified according to the grid size. The parameters were taken in the study through the preparation of the model are (efficiency, cost, and system response) compared to the benefits against disadvantages when combining the two systems to achieve a high performance of the power stability

    The place of the free trade zone in economic development : the example of the United Arab Emirates.

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    SIGLEAvailable from British Library Document Supply Centre- DSC:DX181637 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

    Petrological and Geochemical Analyses and economic potential of some Milestones and Siliceous rocks in northern United Arab Emirates.

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    Combined microscopic, heavy mineral, X-ray diffraction and chemical analyses have been carried out on the Jurassic limestone, the upper cretaceous Hawasina cherts and the coastal and inland sand dunes in several localities in the Ras Al Khaimah Emirate. The obtained results revealed that a number of represents cherts subfacies; namely: ferruginous radiolarian ribbon chert, carbonaceous radiolarian ribbon chert, colloform ribbon chert, calcareous chert and siliceous mud stone. These rocks consist of (in order of decreasing abundance): quartz, calcite, dolomite and hematite. The carbonate rocks are made up of lime mudstone, wackestone; pack stone and, rarely, crystalline limestone. Various types of wackestone and pack stone were recorded. Mineral1ogically, these limestone consist of calcite and much lesser proportions of quartz and dolomite. Diagenesis greatly modified the original textural and compositional characteristics of the rocks especially the limestone. On the other hand, the light fractions of the coastal sand dunes contain higher concentrations of carbonate lithoclasts and skeletal grains and lower proportions of quartz and chert than those of the inland dunes. Also, the heavy fractions of the former sediments are slightly more enriched in opaques, pyroxenes, epidotes and hornblende while depleted in rutile, tourmaline, garnet and monazite. The obtained geochemical data confirm the presence of the main chert types; namely: (i) radiolarites (R), (ii) calcareous cherts (CC), and (iii) siliceous mudstones(SM). Each type has a homogeneous and characteristics major and trace element confirmed by the increase of Ti02, Al2O3), MgO, Fe203) and HFSE ( High Field Strength Elements). The cherts exhibit LREE (Light Rare Earth Elements) fractionated patterns with moderate negative Eu anomalies. R-mode cluster analysis shows three clusters. The first is for the carbonate minerals the second includes the terrigenous components and the third is the silica cluster. Factor analysis produced a two-factor model, which accounts for 85.85% of the data variability. The first is the terrigenous factor (Ti02,Al2O3) FeO, K20, P205 Rb, Ga, Zr and REE), and the second is the carbonate factor. The majority of the studied limestones and a few of the chert rocks are Compositionally similar to those presently used by the Ras Ai Khaimah Rock Company for cement Production and, consequently can be considered for possible future needs. On the other hand, the compositional characteristics of the dune sands, especially the coastal dunes, do not permit their use as a possible source of silica

    Study the effect of the adding of Ash of Palm Fronds on the Mechanical Properties for High Density Polyethylene (HDPE).

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    The mechanical properties of (HDPE - ash of palm fronds) composites were studied. The range of added powder of ash of palm fronds has the values (0%, 1%, 2%, 3%, 4%, 5%, 7.5% and 10%) of polyethylene weight and the best ratio was (10 %). The mechanical properties of (HDPE / ash of palm fronds) composites were analyzed as a function of the added powder amount. All prepared composites showed improved powder dispersion in the high density polyethylene matrix. More composites displayed lower elongation of break compared to pure HDPE. The results lead to that the strength at breaks will be affected little till the percentage (3%) is (6.8 Mpa), and increased after that with increasing the percentages, also indicate a lowered in young's modules (Young modulus) which at the percentage (3%). The highest value of the proportional limit was when the proportion of the added polymer (2%) is (431.2 N) while the less proportion limit of which (372 N) at the percentage is (4%). Keywords: polymer, Mechanical properties, Ash of palm fronds; Polymer composites; high density polyethylene, Fillers

    THE EFFECTIVENESS OF THE SOCIAL NETWORK IN HIGHER EDUCATION IN SAUDI ARABIA: ACTION RESEARCH TO DEVELOP AN E-LEARNING CONCEPTUAL MODEL BASED ON BLOG TOOLS

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    During the last two decades, there has been great interest in integrating computers and technology in higher education. Currently web tool services for learning have attracted researchers in the field of education technology to integrate eLearning within the learning environment. In particular, the Internet has become an increasingly important and novel feature of the modern learning environment. Amongst the innovations, a certain tool has become extremely popular worldwide. It is known as web 2.0. It is a read/write web. Blogs (web logs) are one its fastest growing features. The researcher investigated the exciting prospect of developing an eLearning environment by utilizing and applying effective blogs. To date there has been little use of blogs as online tools in higher education, especially in Saudi Arabia. This study concerned the disclosure of more understanding of the use of web 2.0 applications in higher education in Saudi universities. The first purpose of this study was to develop an eLearning model for web 2.0. Its second purpose was to examine learners’ perceptions and attitudes toward web 2.0 applications, i.e. blog tools by exploring the relationship between learners’ attitudes toward blog tool instructions and factors identified as potentially influencing these attitudes. This research adopted an approach based on an interpretive philosophical paradigm accompanied by a qualitative methodology coupled with action research methods. Learning theories were considered as a theoretical framework. The learning theories considered was Behaviorism, Cognitive and Constructivism with Bloom’s Taxonomy and Boud’s Model. Data was collected qualitatively and analyzed thematically. Triangulation was conducted upon the outcomes of the questionnaires, interviews, observations and blog content analysis. This research made four main contributions. First, it identified the factors that influenced learner acceptance for the use of blog tools in higher education. Second, it investigated the relationship between learners’ attitudes and their acceptance of the utilization of blog tools within their learning environment. Third, it responded to calls from the literature review to investigate blog utilization by conducting an in-depth investigation that utilized qualitative methodology with action research. Lastly, it provided further insight and a better understanding of blog usage with respect to structured/ unstructured learning environments.Minister of Higher Education, Saudi Arabi

    Road network: the silent treasures of Kano metropolis

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    The paper appraised the available road networks in Kano metropolis in relation to their nature; spatial distribution; connectivity index; accessibility index of the Kano urban terrain; and functional wellbeing. The methods used include analysis of secondary data generated from the 2011 satellite imageries (at 0.5m resolution) with the aid of Quantum GIS; road stock inventory; road classification and mapping; as well as field observation. The result shows that, Kano metropolis is well stocked with all sorts of road networks and majority of which (72%) conformed to planning standards and urban environmental quality. The road network density is very high (about 22.72Km/Km2), there is high connectivity index (1.3 Beta Index), and conducive mobility status. The road network structure is made up of two main patterns: a circular and grid topologies. Inadequate road maintenance culture and weak development control measures are the major challenges facing road network performance and development in Kano metropolis. The study concluded that apart from being a medium of mobility, road network in Kano metropolis is also a treasure to current and future generations. It was therefore, recommended that: the scope of Kano State Road Maintenance Agency (KARMA) should be increased to take care of full road revitalization; KNUPDA should come up with stringent measures against erection of detrimental features along road sides; and also scope of Kano State Road Traffic Agency (KAROTA) should be increased so as to take care of road vandalization, destruction and mutilation.Keywords: Kano, Metropolis,Network, Road,Treasure

    In a Democratized Media Context What a Hoax Can Do, a Misinformation Can Do Even Worse: Influences of Fake News on Democratic Processes in Nigeria

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    With the rapid advancements in technology and the democratization of media topology in Nigeria, many people are increasingly gaining access to the media and becoming empowered to actively participate in public debate about issues affecting them in addition to having a great deal of online social interactions. However, people’s access to and interactions with technology and other media have given rise to a host of malicious effects – propagation of doubtful and fabricated content. This has been shown to have the potential to adversely influence people’s lives and sense of judgment, especially regarding democratic processes such as political campaigns during which many malicious fabricated contents are disseminated. In recent history, from 2016, election campaigns in various countries across the world have highlighted how fake news can be targeted at specific people or individuals to influence and misguide them, and even influence polls results. Ever since, issues surrounding fake news and its impacts on democratic and social settings have been gaining pervasive research attention. Hence, the urge to explore the concepts of misinformation and democracy from a Nigerian context through a review of extant literature. In conclusion, several propositions were made, and a conceptual framework was designed for future research to explore the concept and empirically proffer solutions to the growing menace. Keywords: Fake news and misinformation, Media and politics, Media democratization, Nigerian democratic processes, Political campaign, Social media DOI: 10.7176/NMMC/79-02 Publication date: April 30th 201

    Incidence and Antibiotic Susceptibility Pattern of Bacterial Isolates from Wound Infections in a Tertiary Hospital in Nigeria

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    Purpose: To investigate the incidence of different bacteria isolates in 150 wound infections in Aminu Kano Teaching Hospital, Kano, Nigeria and their antibacterial susceptibility patterns.Methods: Wound swab samples were collected from general culture bench of the Microbiology Department, after obtaining consent from the hospital’s Medical Advisory Committee, and cultured for bacterial isolates. The isolates were characterized and identified by standard microbiological methods. Antibiotic susceptibility testing was carried out using Kirby-Bauer-CLSI modified Disc Agar Diffusion technique.Results: Out of the 150 specimens collected, 82 % were infected with bacteria made up predominantl of Staphylococcus aureus (22 %), Pseudomonas aeruginosa (19.9 %), Citrobacter spp (15 %), Escherichia coli (14.7 %) and Proteus mirabilis (14.5 %). In vitro antibiotic susceptibility tests showed that Pseudomonas aeruginosa was susceptible to ceftazidime, ciprofloxacin and gentamicin while the enteric bacteria were generally more resistant to ceftazidime, gentamicin and ciprofloxacin.Conclusion: The findings show that there is a high rate of wound infection in Kano, Nigeria and that antibiotic-resistant bacteria are present in the wound sites.Keywords: Wound infection , Antibiotic, Susceptibility, Bacterial resistanc

    Bacterial agents and sensitivity pattern of neonatal conjuctivitis in Aminu Kano Teaching Hospital

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    Introduction: In Africa alone, between 1000 – 4000 children are blinded annually by conjunctivitis. In view of the changing aetiological agentsdocumented in other parts of the world and evolving resistance of infective agents to therapeutic agents, the present study was designed to define the bacterial agents, their antibiotic sensitivity pattern seen in AKTH, Kano,Nigeria.Patients and methods: This was a cross sectional prospective study done over a period of 3 months. Consecutive neonates who satisfied the inclusion criteria were recruited until the sample size of 175 was obtained. samples were transported to the laboratory within one hour. Gram stainingand antibiotic sensitivity were determined using standard technique.Results: The mean age at presentation was 5.7 ± 4.6days. Results ofthe eye swabs showed that 97 (55.4%) were bacteriologically positive while 78 (44.6%) yielded no growth. Staphylococcus aureus was the most frequently isolated organism and was most sensitive to ceftriaxone, (73.1%). Escherichia coli was most sensitive to gentamicin (78.3%). Pseudomonas aeruginosa and Neisseria gonorrhea showed 100% sensitivity to ceftazidime and ceftriaxone respectively.Conclusion: Staphylococcus aureus is the commonest bacterial agent responsible for neonatal conjunctivitis. Staphylococcus aureus was most sensitive to ceftriaxone.Key words: Conjuctivitis, Neonates, Bacteria, Sensitivity

    Analysis of heavy metals concentration in Kano herbal preparations for major disease conditions

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    The use of herbal medicines for treatment, management and prevention of different disease conditions has been as old as human history. These herbs usually contained some chemical substances which are considered as beneficial, while others were not. Study of the levels of some essential (Copper, Cadmium, Cobalt, Iron, Manganese, Nickel and zinc) and toxic (Cd and Pb) heavy metals content of herbal preparations sold in Kurmi market of Kano state, Nigeria was carried out. The aim of this study is to evaluate the levels of essential and toxic heavy metals in Kano herbal preparations used for commonly identified disease conditions. The samples were digested by wet digestion method with nitric acid and perchloric acids and analyzed using Flame Atomic Absorption Spectrometer (FAAS). The data obtained were statistically treated and the results presented as mean of three replicated. The range of mean concentrations of the essentials Cu, Co, Fe, Mn, Ni, Zn and toxic Cd, Pb heavy metals obtained were 4.94-10.03μg/g, 3.33-3.80μg/g, 163.04-350.95 μg/g, 57.57-65.05μg/g, 9.94-15.63μg/g,, 6.86-66.59 μg/g and 1.53-3.23μg/g, 3.75-35.24 μg/g respectively. The level of contamination of the herbal preparation with the toxic heavy metals indicated 100% of the samples analyzed contained cadmium above WHO permissible limits (0.3μg/g) specified for herbal medicine and 33% of the samples contained lead (Pb) above WHO permissible limits (10μg/g) specified for herbal medicine. The gross level of contamination of these herbal preparations with Pb and Cd metals could be associated to poor adherence to quality control requirements such as current/good manufacturing practice (CGMP) and effective surveillance/enforcement. There is need for commitment for immediate action by both the herbal medicine practitioners and the relevant stakeholders in order to avert impending health hazards due to the tendency of gradual accumulation of these toxic metals in the body system of the consumers of these herbal preparations in order to attain to safe and effective herbal medicine usage in Nigeria.Keywords: Disease conditions, Heavy metals, Herbal preparations, Kan
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