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Bonding Characteristics of TiC and TiN  [PDF]
Kuiying Chen, Sami Kamran
Modeling and Numerical Simulation of Material Science (MNSMS) , 2013, DOI: 10.4236/mnsms.2013.31002

Using ab initio density functional theory calculations, the electron localization function (ELF) of typical transition metal carbide TiC and nitride TiN were computed and analyzed to reveal their nature of the chemical bonds. The ELF approach was initially validated through typical examples of covalent-bonding Diamond (C) and ionic-bonding sodium chloride NaCl. Our results clearly demonstrate the dominantly ionic bonding characteristics of TiC and TiN. It is also suggested that the high mechanical hardness of TiC and TiN can be explained without evoking strong covalence.

Common coincidence points of -weakly commuting maps
Tayyab Kamran
International Journal of Mathematics and Mathematical Sciences , 2001, DOI: 10.1155/s0161171201005245
Abstract: A common coincidence point theorem for R-weakly commuting mappings is obtained. Our result extend several ones existing in literature.
Immunization week in Saudi Arabia 2012
Kamran S
theHealth , 2012,
Saudi Arabia: a report on health
Kamran S
theHealth , 2012,
Kamran Khalid
The Professional Medical Journal , 1995,
Mobile Phone: Calling and Texting Patterns of College Students in Pakistan
Sohail Kamran
International Journal of Business and Management , 2010, DOI: 10.5539/ijbm.v5n4p26
Abstract: This paper qualitatively investigated the mobile phone calling and texting patterns among youth in Pakistan. Initially, the data was gathered from seventy seven (n=77) college students aged 17-21 years, who completed twenty four hours mobile phone communication diaries. Completed communication diaries were followed by twenty three in-depth interviews with the college students to collect detailed background information. Study results revealed congruity of SMS and calling patterns among male and female youth. This research discovered that the majority of youth is extremely high user, fond of texting and low user of voice calls. This research unfolded that the youth do most of the mobile phones communications within their age group, communicate in both positive and negative ways. However, majority of mobile phone communications among youth could be categorized as problematic with reference to the place, time, and purpose. The main motivation of high and problematic use among youth is very low priced prepaid packages offered by the telecom operators in Pakistan. Policy implications for the regulatory body are to educate the youth about the appropriate and inappropriate use of mobile phone technology, and issuance of code of advertising to the telecom operators in Pakistan.
Warfarin-induced necrosis of the breast: Case report
Khalid Kamran
Journal of Postgraduate Medicine , 2004,
Abstract: Warfarin-induced necrosis of the breast is an unusual complication of warfarin therapy. Since its first description in 1943, up to 36 cases have been reported in the English literature. Close association between inherited or functional deficiency of protein C and S and warfarin therapy is frequently reported. A characteristic patient is an obese middle-aged female receiving anticoagulant treatment. The rapidly evolving painful lesion appears suddenly, usually within 3 to 6 days after initiation of warfarin therapy. Prevention may be achieved by identifying the high-risk patients-female gender, middle age, obesity, and avoiding large loading doses of warfarin. Early recognition and treatment are necessary to avoid significant long-term morbidity. Established necrosis necessitates debridement and sometimes mastectomy. A case of warfarin-induced necrosis of the left breast mimicking inflammatory cancer is reported. Current recommendations for the prevention and treatment of this uncommon condition are reviewed.
Gaugino Condensation with S-Duality and Field-Theoretical Threshold Corrections
Kamran Saririan
Physics , 1996, DOI: 10.1103/PhysRevD.55.4839
Abstract: We study gaugino condensation in the presence of an intermediate mass scale in the hidden sector. S-duality is imposed as an approximate symmetry of the effective supergravity theory. Furthermore, we include in the K\"ahler potential the renormalization of the gauge coupling and the one-loop threshold corrections at the intermediate scale. It is shown that confinement is indeed achieved. Furthermore, a new running behaviour of the dilaton arises which we attribute to S-duality. We also discuss the effects of the intermediate scale, and possible phenomenological implications of this model.
Gaugino Condensation, Loop Corrections, and S-duality Constraint
Kamran Saririan
Physics , 1996,
Abstract: This talk is a brief review of gaugino condensation in superstring effective field theories and some related issues (such as renormalization of the gauge coupling in the effective supergravity theories and modular anomaly cancellation). As a specific example, we discuss a model containing perturbative (1-loop) corrections to the K\"ahler potential and approximate S-duality symmetry.
On Fermion Zero-Modes in Instanton $V-A$ Models With Spontaneous Symmetry Breaking
Kamran Saririan
Physics , 1993, DOI: 10.1142/S0217732394000526
Abstract: The left and right handed fermion zero-modes are examined. Their behaviour under the variation of the size of the instanton, $\ri$, and the size of the Higgs core, $\rh$, for a range of Yukawa couplings corresponding to the fermion masses in the electroweak theory are studied. It is shown that the characteristic radii of the zero-modes, in particlar those the left handed fermions, are locked to the instanton size, and are not affected by the variation of $\rh$, except for fermion masses much larger than those in the standard electroweak theory.
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