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Topi, Pakistan

The Ghulam Ishaq Khan Institute of Engineering science and Technology , is a private research university located in Topi, Khyber Pakhtunkhwa, Pakistan. GIKI has six academic departments strongly emphasizing on science and engineering and its 400 acres primary campus is located in the vicinity of Swabi district of Khyber Pakhtunkhwa, Pakistan.Founded by civil servant and former President Ghulam Ishaq Khan in 1988, the college attracted country's influential scientists such as Abdul Qadeer Khan, Asghar Qadir, and Shaukat Hameed Khan since its establishment, and played formulating role in transforming the college in elevating as one of world's finest science and engineering college. GIKI is among one of the top institutions ranked by the HEC, and also has a long standing competition with the Pakistan Institute of Engineering and Applied science . Wikipedia.

Azeem S.,University of Peshawar | Zain-Ul-Abdein M.,Ghulam Ishaq Khan Institute of Engineering Sciences and Technology
International Journal of Engineering Science | Year: 2012

This paper presents an investigation of thermal conductivity enhancement of a particulate filled polymeric composite. Different samples of bakelite-graphite composite material were prepared by compression molding technique. Conductive filler (graphite) percentage varied from 30% to 55% by volume. Thermal conductivities of composite samples were measured by using P.A Hilton Heat Conduction Unit H-940. ASTM standard E1225-99 was followed for numerical calculation. Gradual increase in thermal conductivity has been observed, with increase in conductive filler percentage in composite sample. Since many theoretical/empirical models are available in the literature for the estimation of effective thermal conductivity of filled composite systems. Therefore, the experimental results of thermal conductivity were plotted along with the available theoretical models. It was found that the Mori-Tanaka model for prolate inclusions and the Hamilton-Crosser model yield the closest approximation to the measured thermal conductivity of filled composite system where the particle shape morphology is important. © 2011 Elsevier Ltd. All rights reserved.

Nabi J.-U.,Ghulam Ishaq Khan Institute of Engineering Sciences and Technology
International Journal of Modern Physics E | Year: 2010

Weak interaction rates on titanium isotopes are important during the late phases of evolution of massive stars. A search was made for key titanium isotopes from available literature and a microscopic calculation of weak rates of these nuclei were performed using the proton-neutron quasiparticle random phase approximation (pn-QRPA) theory. Earlier the author presented the stellar electron capture rates on titanium isotopes. In this paper I present the neutrino and antineutrino energy loss rates due to capture and decay rates on isotopes of titanium in stellar environment. Accurate estimate of neutrino energy loss rates are needed for the study of the late stages of the stellar evolution, in particular for cooling of neutron stars and white dwarfs. The results are also compared against previous calculations. At high stellar temperatures the calculated neutrino and antineutrino energy loss rates are bigger by more than two orders of magnitude as compared to the large scale shell model results and favor stellar cores with lower entropies. This study can prove useful for core-collapse simulators. © World Scientific Publishing Company 2010.

Wang K.,TU Darmstadt | Hussain A.,Ghulam Ishaq Khan Institute of Engineering Sciences and Technology | Jo W.,TU Darmstadt | Rodel J.,TU Darmstadt
Journal of the American Ceramic Society | Year: 2012

Ferroelectric and piezoelectric properties of SrTiO 3-modified (0, 3, and 5 mol%) 0.8Bi 1/2Na 1/2TiO 3-0.2Bi 1/2K 1/2TiO 3lead-free piezoceramics were investigated as a model system in an attempt to lay a guideline for developing lead-free piezoelectric materials with large strains. Two guidelines, one for the choice of base composition and the other for the choice of chemical modifiers, were assumed from our current understanding of the mechanism involved. Dielectric permittivity of both poled and unpoled samples was measured and compared, leading to a conclusion that the frequency-independent anomaly (T F-R) is the temperature at which induced-ferroelectric order converts back to relaxor state. The correlation between T F-Rand depolarization temperature (T d) was shown by the comparison with T ddetermined by thermally stimulated depolarization current measurements, whereas the ferroelectric-relaxor transition temperature T F-Rwas determined using poled samples. A large unipolar strain of 0.36% (S max/E max= 600 pm/V) at a driving field of 6 kV/mm was obtained at room temperature for a SrTiO 3content of 5 mol%. Temperature-dependent measurements of both polarization and strain from room temperature to 200°C revealed that the origin of the large strain is due to a reversible field-induced ergodic relaxor-to-ferroelectric phase transformation. © 2012 The American Ceramic Society.

Joya K.S.,Leiden University | Joya K.S.,Max Planck Institute for Chemical Energy Conversion | Joya K.S.,University of Engineering and Technology Lahore | Joya Y.F.,Ghulam Ishaq Khan Institute of Engineering Sciences and Technology | And 2 more authors.
Angewandte Chemie - International Edition | Year: 2013

The development of new energy materials that can be utilized to make renewable and clean fuels from abundant and easily accessible resources is among the most challenging and demanding tasks in science today. Solar-powered catalytic water-splitting processes can be exploited as a source of electrons and protons to make clean renewable fuels, such as hydrogen, and in the sequestration of CO2 and its conversion into low-carbon energy carriers. Recently, there have been tremendous efforts to build up a stand-alone solar-to-fuel conversion device, the "artificial leaf", using light and water as raw materials. An overview of the recent progress in electrochemical and photo-electrocatalytic water splitting devices is presented, using both molecular water oxidation complexes (WOCs) and nano-structured assemblies to develop an artificial photosynthetic system. Turning a new leaf: Electrochemical and light-driven electrocatalytic water oxidation assemblies have been targeted to develop artificial photosynthetic system. Such "Artificial Leaves" are used to make H2 and O2 using water as a raw material. The design and performance of the water oxidation systems and standalone solar-to-fuel conversion devices are presented. Progress in the field and future perspectives of water splitting are also discussed. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Zubair M.,Ghulam Ishaq Khan Institute of Engineering Sciences and Technology | Mughal M.J.,Ghulam Ishaq Khan Institute of Engineering Sciences and Technology | Naqvi Q.A.,Quaid-i-Azam University
Nonlinear Analysis: Real World Applications | Year: 2011

The vector Helmholtz equation in fractional space can describe the complex phenomenon of wave propagation in fractal media. With this view, a generalized Helmholtz equation for wave propagation in fractional space is established and its analytical solution is obtained. The special case for integer space is recovered and the results are in exact agreement with those obtained in the literature. © 2011 Elsevier Ltd. All rights reserved.

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