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38 results for “Resistivity”
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Research ArticleOpen accessIn the keywordsGeophysical and Geological Studies of the Spread and Industrial Quality of Okurike Barite DepositAnthony E. Akpan, Ebong D. Ebong, Stephen E. Ekwok, Sackey JosephInvestors have been avoiding the Okurike Barite due to paucity of information on its economic worth in spite of the high demand for barites by the local industries. This study was embarked upon to determine the spread and industrial quality of the barite deposit in order to bridge the information gap. The Okurike Barite mineralised site was investigated using geophysical … …American Journal of Environmental Sciences, Vol. 10, Issue 6 · 22 Dec 2014 · 7,256 accessesView PDFCite
Research ArticleOpen accessIn the keywordsGEOPHYSICAL AND LABORATORY STUDIES OF THE SPREAD AND QUALITY OF THE ODUKPANI LIMESTONE DEPOSITT. E. Chidomerem, A. E. Akpan, I. O. AkpanThe Odukpani limestone deposit has been investigated using geophysical and laboratory techniques with the aim of generating information on its spread and quality. Information generated from the analyses of twenty-six Vertical Electrical Soundings (VES) and core drilling data were used in the study. The VES data were acquired in both grid and random patterns in the immediate area of the … …American Journal of Environmental Sciences, Vol. 10, Issue 4 · 20 Jun 2014 · 7,097 accessesView PDFCite
Research ArticleOpen accessIn the keywordsTHE ELECTRICAL PROPERTIES OF Mg-Cu-Zn FERRITES IRRADIATED BY γ-RAYS OF 60Co SOURCEMohamed Eltabey, H. Ebrahim Hassan, Ismail Abd Elrahim AliFerrite samples with chemical formula MgxCu0.5-xZn0.5Fe2O4 (x = 0.0, 0.2 and 0.4) was prepared by the conventional ceramic method. The enhanced changes in the dc/ac resistivity and the dielectric constant due to γ-rays irradiation by 60Co source were measured using the two probes technique. The samples showed decreasing of their resistivity at room temperature after irradiation for both dc and … …American Journal of Applied Sciences, Vol. 11, Issue 1 · 10 Dec 2013 · 7,478 accessesView PDFCite
Research ArticleOpen accessIn the keywordsInvestigations of Two-Layer Earth Parameters at Low Voltage: Measurements and CalculationsRamdan E. Rajab, N. Mohamad Nor, K. RamarProblem statement: The two-layer soil model at low magnitude voltage is assumed to be accurate for the measurement and calculation of the earth resistance of a combined grid-multiple rods electrode. The aim of this study is to measure and calculate the earth resistance of a combined grid-multiple rods electrode buried in a two-layer soil and to confirm the simplicity and … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 1 · 31 Mar 2009 · 7,816 accessesView PDFCite
Research ArticleOpen accessIn the keywordsValidation of the Calculation and Measurement Techniques of Earth Resistance ValuesN. Mohamad Nor, R. Rajab, K. RamarMuch research has been published in the literature on the mathematical approaches to obtain the most accurate earth resistance and resistivity values. However, the published research only conducted the comparisons among the mathematical/computational techniques and so far none has conducted validation tests of these mathematical/computational methods against the real earth resistance measurement at real field sites. Thus, the main contribution … …American Journal of Applied Sciences, Vol. 5, Issue 10 · 31 Oct 2008 · 7,214 accessesView PDFCite
Research ArticleOpen accessIn the keywordsAppraisal of Thermal Properties of Mud in the Ariake Sea, JapanM. Azizul Moqsud, Shigenori Hayashi, Yan Jun Du, Daisuke SuetsuguIn order to explore the thermal properties of the Ariake Sea mud and to find out the affecting factors which affect these values, a portable thermal properties analyzer was used. Thermal conductivity, thermal resistivity, thermal diffusivity and volumetric heat capacity of the mud samples collected from both the tidal flat and inside the deep sea were measured in the laboratory. … …American Journal of Environmental Sciences, Vol. 4, Issue 2 · 30 Apr 2008 · 6,966 accessesView PDFCite
Research ArticleOpen accessIn the keywordsDevelopment of Ionizing Radiation Sensors Based on Carbon NanotubesKenneth Fontánez, Abraham García, María del C Cotto-Maldonado et al.SWNTs have been efficiently grown on patterned substrates, for its subsequent application to the development of ionizing radiation sensors. SWNTs before and after exposure to X-rays were characterized by Raman and XPS spectroscopy, revealing the appearance of alterations that have been justified as possibly due to the presence of adsorbed oxygen species. These materials have been used for the fabrication … …American Journal of Engineering and Applied Sciences, Vol. 12, Issue 2 · 29 May 2019 · 7,191 accessesView PDFCite
Research ArticleOpen accessIn the keywordsSuperiority of Prostration as a Protection from Lightning StrikeMiah Muhammad AdelProblem statement: Because of the significant fatalities due to lightning strikes in open fields, exploration has been made to find the human body’s most comfortable posture having the lowest length, width and height and the least ground touch in any terrain indoor and outdoor for the safest shelter from lightning strikes that neutralize an enormous amount of positive and negative … …Physics International, Vol. 3, Issue 1 · 14 May 2012 · 15,423 accessesView PDFCite
Research ArticleOpen accessIn the abstractThermal Treatment Effects on the Thermoelectric Properties of Ni/Si/Si + Sb/Si/Si + Ge/Ni Multilayer Thin FilmsSatilmis Budak, Zhigang Xiao, Shujun YangThe multilayer thermoelectric devices including Ni/200 layers of Si/Si + Sb/200 layers of Si/Si + Ge/Ni thin films were fabricated using electron beam and DC/RF magnetron sputtering deposition systems. The thickness measurements have been performed using Filmetrics UV thickness measurement system. The Au contacts at the bottom and top of the fabricated thermoelectric devices were measured as 100 nm for … …American Journal of Engineering and Applied Sciences, Vol. 13, Issue 4 · 14 Nov 2020 · 6,710 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffects of Moisture Content on Thermal Properties of Adobe Bricks as a Sustainable Building MaterialSuleman Modu NgaramThe adobe is a widely used traditional material in popular building construction in rural areas of Northeastern, Nigeria and more generally in African countries. In order to increase comfort and energy efficiency of buildings, it is necessary to better consider the thermal properties of the adobe. Adobes at different locations as a function of moisture content have been studied. Thermal … …American Journal of Applied Sciences, Vol. 17, Issue 1 · 15 Apr 2020 · 10,256 accessesView PDFCite