Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=54122#.VO2K2CzQrzE Author(s)  F. I. El-Zahraa 1 , G. T. Abdel-Jaber 1 , M. I. Khashaba 2 , W. Y. Ali 3   Affiliation(s) 1 Faculty of Engineering, South Valley University, Qena, Egypt . 2 Faculty of Engineering, Minia University, Minya, Egypt . 3 Faculty of Engineering, Taif University, Taif, KSA . ABSTRACT The wide use of epoxy composites as bearing materials in electronic appliances necessitates studying their frictional behaviour under the influence of magnetic field. Experiments were carried out to investigate the effect of magnetic field on the friction coefficient displayed by the scratch of epoxy composites filled by iron, copper and aluminium particles at different concentrations. It was observed that, for epoxy filled by the metallic fillers (iron, copper and aluminium), under the effect of the magnetic field, friction coefficient showed relativ...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52399#.VJOW-cCAM4 Author(s) Lukong Cornelius Fai 1 , Ngwa Engelbert Afuoti 1,2 , Georges Collince Fouokeng 1* , Jules Casimir Ngana Kuetche 1,3 , Martin Tchoffo 1 Affiliation(s) 1 Mesoscopic and Multilayer Structures Laboratory, Department of Physics, University of Dschang, Dschang, Cameroon . 2 Department of Thermal Engineering and Energy, Douala University Institute of Technology, Douala, Cameroon . 3 Department of Physics, University of Buea, Buea, Cameroon . ABSTRACT We revisit the quantum features of an anti-ferromagnetic (AF) spin environment at finite temperature with gap in its frequency spectrum, on the dynamics quantum co...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=47113#.VGGGV2fHRK0 Author(s) Ahmed Rida Galaly , Hamdi Hussien Zahran Affiliation(s) Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt . Department of Botany, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt . ABSTRACT A different combined effects for helium gas discharge such as: magnetic field strength, breakdown voltage, applied power, applied pressure, cathode fall thickness, edge effect, distribution of the electron temperature and density, and finally exposure time for Staphylococcus aureus substrate over slides at the cathode edge, are discussed under the influence of cold, nonthermal p...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=48472#.VD4YO1fHRK0 Author(s)     Tongqin Chang , Yongqiang Wang Affiliation(s) Institute of Physics and Electronic Engineering, Zhengzhou University of Light Industry, Zhengzhou, China . Institute of Physics and Electronic Engineering, Zhengzhou University of Light Industry, Zhengzhou, China . ABSTRACT Samples Zn 0.98 Fe 0.02 O doped with additional Cu have been fabricated by a coprecipitation method. It is found that Zn 0.98 Fe 0.02 O without additional doping shows weak ferromagnetism at room temperature. The Cu doping has induced a light increase of magnetization in low temperature of 10 K. This result is consistent with bound magnetic polaron mode...