14 results for “Dust Effects”

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Research ArticleOpen accessIn the abstractLightning Over-Voltages on Amman-Aqaba 400 KV LineGhassan Halasa, Ibrahim Badran, Hafez El-ZayyatAn attempt is made to evaluate the lightning over-voltage failure rate for Amman- Aqaba 400kV transmission line by studying the geographical and temporal characteristics of lightning causing the line forced outages. The line was divided into three sections based on weather and pollution conditions. It was found that the line failure rate due to lightning over-voltages is low compared to … …American Journal of Applied Sciences, Vol. 4, Issue 12 · 31 Dec 2007 · 6,632 accessesView PDF Cite

Research ArticleOpen accessIn the abstractPM Emissions in a Urban ContextEnrico Brizio, Giuseppe Genon, Stefania BorsarelliWithin a urban environment, three different sources of particulate matter should be considered: heating plants using different combustibles (natural gas, gas oil, fuel oil, wood), industrial plants placed in the surrounding area, traffic. While the effects of the first two origins can be easily calculated on the basis of existing emission factors, the PM emissions from traffic are of two … …American Journal of Environmental Sciences, Vol. 3, Issue 3 · 30 Sep 2007 · 6,872 accessesView PDF Cite

Research ArticleOpen accessAll words, across the recordFade Margin Analysis Due to Duststorm Based on Visibility Data Measured in a DesertMd. Rafiqul Islam, Zain Elabdin Elshaikh, Othman O. Khalifa et al.Problem statement: The fade margin analysis of microwave propagation in areas affected by duststorm had been presented in this study. Approach: Based on long term duststorm data recorded in Riyadh-Saudi Arabia, the fade margin due to duststorm effects estimated. Results: The fade margin due to duststorm then derived under various water contents during the storm. Conclusion/Recommendations: It was particularly shown … …American Journal of Applied Sciences, Vol. 7, Issue 4 · 30 Apr 2010 · 7,674 accessesView PDF Cite

Research ArticleOpen accessAll words, across the recordChemical and Physical Characteristics of Cocopeat-Based Media Mixtures and Their Effects on the Growth and Development of Celosia cristataYahya Awang, Anieza Shazmi Shaharom, Rosli B. Mohamad, Ahmad SelamatProblem statement: Cocopeat is considered as a good growing media component with acceptable pH, electrical conductivity and other chemical attributes but it has been recognized to have high water holding capacity which causes poor air-water relationship, leading to low aeration within the medium, thus affecting the oxygen diffusion to the roots. Incorporation of coarser materials into cocopeat could improve the … …American Journal of Agricultural and Biological Sciences, Vol. 4, Issue 1 · 31 Mar 2009 · 19,001 accessesView PDF Cite