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Dusty Plasmas (Complex plasmas) رفعت صبرى عبدالوهاب
Basic properties: charging effect, dispersion properties, external magnetic field, two-ion temperature, ion beam, ion streaming, and dust-size distribution.  Electrostatic excitations: dust-acoustic solitary waves, dust-ion-acoustic solitary waves and shocks, instabilities. Electromagnetic excitations: self-gravitational, rotational, opposite polarity dust particles, instabilities. Charging of dust grains: ionization source model. ...
Lie Groups and Symmetry Reduction Techniques رفعت صبرى عبدالوهاب

Lie symmetry analysis and the application of Lie groups to nonlinear differential equations arising in mathematical physics. Within the area of symmetry analysis, I am interested in both classical and nonclassical point symmetries, as well as in nonlocal (potential) symmetries. I am most interested in the general class of nonlinear diffusion-convection equations, which has a variety of applications to the real physical world such as plasma physics, metallurgy, segregation of granular materials, porous media ( including unsaturated flow), and migration of nuclides leaching out of a repository, to name only a few.

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Nonlinear Wave Phenomena (Soliton Theory) رفعت صبرى عبدالوهاب

Nonlinear wave phenomena (Soliton Theory). Together with strange attractors and chaos, solitons play a key role in nonlinear science. Solitons are stable, particle-like, nonlinear pulses which result from a critical balance between nonlinearity and dispersion (or dissipation). My theoretical work is concerned with partial differential equations (PDEs) that admit, specifically, soliton solutions and in general travelling wave solutions. Such PDEs model shallow- and deep-water waves, charge-density waves in plasmas, nonlinear optical pulses, nonlinear transmission lines, fluxons in Josephson transmission lines, nerve pulses, waves in the atmosphere, Bose-Einestein condensates, etc. Also, I am interested in integrability tests and painlevé analysis of PDEs.

Powerful symbolic manipulation programs such as Mathematica, Macsyma, Reduce, Maple, and Derive offer virtually unlimited potential to do mathematics on a computer. The symbolic-crunching capabilities of these software packages (Mathematica and Maple) allow me to obtain soliton solutions without having to do the tedious algebra and calculus with pen and paper.

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التلبس بالجريمة عبدالعزيز عبدالرحمن الخليفة

يتحدث البحث عن التلبس تعريفة وحالاته في النظام السعودي 

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جريمة غسيل الأموال عبدالعزيز عبدالرحمن الخليفة

يتحدث البحث عن جريمة غسيل الأموال من حيث التعريف والأخطار وطرق المكافحة وعلاقتها بالجرائم الأخرى

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Spin Polarized Transport in an AC-Driven Quantum Curved Nanowire نبيل عبد الفتاح ابراهيم

        Using the effective - mass approxmation methode, and floquet theory, we study the spin transport characteristic through a curved-quantum nanowire. So, can study the spin polarization and tunneling magnetoresistance "TMR" under effect Infrared, ultraviolet radiations.

This paper is published at: Physics Research International (2011), Article ID 505091, 5 pages, doi:10.1155/2011/505091.

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Noise and Fano-factor Control in AC-Driven Aharonov-Casher Ring نبيل عبد الفتاح ابراهيم
Spin-Dependent Transport through Aharonov-Casher Ring Irradiated by an Electromagnetic Field نبيل عبد الفتاح ابراهيم


         The spin dependent conductance of mesoscopic device is investigated under the effect of infrared and ultraviolet radiation and magnetic field. This device is modeled as Aharonov-Casher ring and a quantum dot is imbedded in one arm of the ring. The result show oscillatory behavior of the conductance due to Coulomb blockade effect and the interplay of Rashba spin orbit coupling strength with induced photons of electromagnetic field.

This paper is published in: Progress n Physic, 4 (2010), 78.

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Transport Characteristics of Mesoscopic Radio-Frequency Single Electron Transistor. نبيل عبد الفتاح ابراهيم

         In this paper investigate in field in mesoscopic devices " nano scale devices" which studey transport of single electrons in quantum dot and measured the radio frequency result due to transport this electrons between different levels by effected electromagnetic and electric waves.

Tis paper is publised in: CHIN. PHYS. LETT>, Vol. 25, No. 1 (2008). 250.

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Correlation between clinical characteristics, survival and genetic تهاني محمد الهزاني

Correlation between clinical characteristics, survival and genetic

alterations in patients with hepatocellular carcinoma from Saudi Arabia

Ahmed Al-Qahtania, Tahani Al-Hazzanib, Turki Al-hussainc, Abdulmonem Al-Ghamdic,

Hadeel Al-Manac, Saud Al-Arifid, Mohammed Al-Ahdala, Magdy Alye,f,*

aBiological and Medical Research (MBC 03), King Faisal Specialist Hospital and Research Centre, Box 3344 (MBC-03), Riyadh 11211, Saudi Arabia

bScientific Section, Department of Biology, University of Princess Nora Bent Abdul Rahman, P.O. Box 84428, Riyadh 11671, Saudi Arabia

cDepartment of Pathology and LaboratoryMedicine, King Faisal SpecialistHospital and Research Centre, P.O. Box 3544 (MBC-03), Riyadh 11211, Saudi Arabia

dZoology Department, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia

eBiology Department, Jazan University, P.O. Box 114, Jazan 45142, Saudi Arabia

fZoology Department, Beni-Suef University, P.O. Box 169 Imbaba, Beni-Suef 62511, Egypt

Received 16 June 2010; received in revised form 30 July 2010; accepted 8 August 2010

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