Science Research

Volume 3, Issue 4, August 2015

  • Factors Affecting the Choices of Coping Strategies for Climate Extremes: The Case of Yabello District, Borana Zone, Oromia National Regional State, Ethiopia

    Dirriba Mengistu, Jema Haji

    Issue: Volume 3, Issue 4, August 2015
    Pages: 129-136
    Received: 28 January 2015
    Accepted: 10 February 2015
    Published: 25 June 2015
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    Abstract: This study was undertaken in Yabello district of Borana zone to identify factors affecting the choices of coping strategies for climate extremes and the ongoing coping strategies in topical condition. The primary data collected from 123-sample households was analyzed with multinomial logit model. The multinomial logit outcomes were includes coping ... Show More
  • Quartz Veins Characteristics and Au Mineralization Within the Batouri Au District, East Cameroon

    Mero Yannah, Cheo Emmanuel Suh, Mboudou Germain M. Mboudou

    Issue: Volume 3, Issue 4, August 2015
    Pages: 137-149
    Received: 28 May 2015
    Accepted: 12 June 2015
    Published: 30 June 2015
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    Abstract: The Batouri south Au district of East Cameroon is hosted by biotite-amphibole meta-granites that belong to the Pan-African group of Pre-to Syn D1 and D2 Neoproterozoic granitoids. Hydrothermal activity and Au mineralization in this area is greatly enhanced by the presence of fractures, foliations, faults (sinistral) and vein splays hosted within a ... Show More
  • Optimisation of Reflow Profile of Surface Mount Assembly Using Taguchi Design of Experiments

    Gabriel Takyi, Peter Kojo Bernasko

    Issue: Volume 3, Issue 4, August 2015
    Pages: 150-169
    Received: 25 May 2015
    Accepted: 16 June 2015
    Published: 02 July 2015
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    Abstract: A major source of concern in the electronic manufacturing industry is the reliability of solder joints produced by lead-free solders pastes. Research has shown that solder joint produced with a thin layer of intermetallic compounds (IMC) during the reflow process has a higher reliability. The focus of this paper is on the development of a deeper un... Show More
  • Illuminance (lm M-2) of Compact 20W-HCFL Tube

    Lyuji Ozawa

    Issue: Volume 3, Issue 4, August 2015
    Pages: 170-179
    Received: 11 May 2015
    Accepted: 23 May 2015
    Published: 05 June 2015
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    Abstract: It has found that the study on the FL tubes has made with the deliberately modified Ulbricht Spheres for the determination of the luminous efficiency (lm W) that uses in the study on the colorimetry and that invalidates the study on the light sources. The study on the light sources should make with either illuminance (lm m-2), or luminance (cd m-2)... Show More
  • Distribution and Seasonal Variation of Nutrient Salts and Chlorophyll-a in Surface Seawater Along Alexandria Costal Zone Area

    Edweb Ali Salem Dango, Mahmoud Salem Ibrahim, Mohamed Abel Aziz Okbah, Mei Ibrahim El Gmaal

    Issue: Volume 3, Issue 4, August 2015
    Pages: 180-190
    Received: 30 May 2015
    Accepted: 12 June 2015
    Published: 04 July 2015
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    Abstract: The aim of the present study is to investigate the hydrographic characteristics, nutrient salts and chlorophyll-a (Chl-a) along Alexandria Costal Zone Area. The study revealed that the pH values lie slightly in the alkaline side, with a range of 7.53 to 8.12, salinity showed a slightly variation, it ranged from 35.34 to 38.28 PSU, the values of dis... Show More
  • Husbandry Practices and Utilization of Camel Products in Borana Zone of Southern Oromia, Ethiopia

    Dejene Takele Gebissa

    Issue: Volume 3, Issue 4, August 2015
    Pages: 191-197
    Received: 08 May 2015
    Accepted: 22 May 2015
    Published: 09 July 2015
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    Abstract: This survey was conducted in Borana zone to assess camel husbandry and product utilization practices, and identify major constraints of camel production. The result showed that camel was ranked the first economically important livestock species followed by goats and cattle, consecutively. Per producer holding of female of 1-3 year, heifer of 3-5 ye... Show More
  • Breast Carcinoma in Younger Algerian Eastern Women: Epidemiological Profile in Series of 135 Cases

    Sarra Henouda, Assia Bensalem, Leila Rouabah

    Issue: Volume 3, Issue 4, August 2015
    Pages: 198-205
    Received: 03 July 2015
    Accepted: 13 July 2015
    Published: 22 July 2015
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    Abstract: Background: Actually, Breast cancer constitutes one of the most health problems in Algeria, and the leading cause of death among Algerian women. Breast cancer in young women is a rare form, but it has an aggressive behavior associated with a poor prognosis. Aims: this study focuses to report breast cancers phenotype in Algerian younger women. Mater... Show More
  • Generating Spatial Correlated Binary Data Through a Copulas Method

    Renhao Jin, Sha Wang, Fang Yan, Jie Zhu

    Issue: Volume 3, Issue 4, August 2015
    Pages: 206-212
    Received: 05 July 2015
    Accepted: 16 July 2015
    Published: 25 July 2015
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    Abstract: Simulating spatial correlated binary data is very important on many cases, but it is not easily to accomplish, as there are restrictions on the parameters of Bernoulli variables. This paper develops a copulas method to generate spatial correlated binary data. The spatial binary data generated by this method has an inverse spatial pattern comparing ... Show More
  • The Design and Need for Jigs and Fixtures in Manufacturing

    Charles Chikwendu Okpala, Ezeanyim Okechukwu C.

    Issue: Volume 3, Issue 4, August 2015
    Pages: 213-219
    Received: 21 June 2015
    Accepted: 18 July 2015
    Published: 28 July 2015
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    Abstract: The paper gave a detailed definition of jigs and fixtures, and also identified the numerous advantages that are associated with the use of jigs and fixtures in manufacturing to include: production increase, cost reduction, interchangeability and high accuracy of parts, reduction of the need for inspection and quality control expenses, reduction of ... Show More
  • Development of New Electrons Sources for coil-EEFL Tube

    Lyuji Ozawa

    Issue: Volume 3, Issue 4, August 2015
    Pages: 220-229
    Received: 16 July 2015
    Accepted: 21 July 2015
    Published: 05 August 2015
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    Abstract: After the critical study on the established FL tubes, it has found a formation of the new internal DC electric power generator in the Ar gas space between the needle cathode and anode. The internal DC electric power generator, which completely isolates from the external DC electric circuit by the electron flow, forms with the volumes of the glow li... Show More
  • Coil-EEFL Tubes as Unrivaled Light Source with Small Wcoil Over Solid Light Sources

    Lyuji Ozawa

    Issue: Volume 3, Issue 4, August 2015
    Pages: 230-239
    Received: 16 July 2015
    Accepted: 23 July 2015
    Published: 06 August 2015
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    Abstract: It has found that the active power consumption, Wcoil, of the single coil-EEFL tube that is not related with the energy for the generation of the lights, reduces to below 0.1 Wact of the commercial CCFL tube with the same brightness of the original CCFL tube. The coil-EEFL tubes allow the parallel connection with the single external AC driving circ... Show More