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.

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Ali Y.,Ghulam Ishaq Khan Institute of Engineering Sciences and Technology | Ali Y.,University of Macerata
Renewable and Sustainable Energy Reviews | Year: 2017

The traditional approach of accounting of environmental pressure in the Kyoto Protocols follows the production-based accounting, which attributes all environmental pressures generated from production activities within a country boundary to that country total environmental pressure. However, the major flaws of this approach is that it does not take into account the environmental pressures embodied in imports and so build stimulus for shifting of environmental pressures abroad. An alternative approach to include environmental pressures associated with imports to the country and subtract export related environmental pressures is the consumption-based approach or footprint approach. This approach has been widely considered as an alternative way to more adequately allot responsibilities between the emitters and final consumers. This study compares and discusses the concepts of both approaches, showing the results of an empirical analysis and going into the application of the two different perspectives in worldwide environmental policies. This paper presents the results of an analysis of the Carbon, water and land footprints of the worldwide from 1995 to 2009, and compares the outcomes for the two approaches for four world regions (i.e. EU, OECD, BRIC and RoW). The analysis is based on a multi-region input output (MRIO) model to assess these environmental pressures. The proposed model uses the world-input-output-database (WIOD) covering 35 sectors and 41 countries. The results show that during the entire study period, the carbon emissions, land use and water use for the EU and OECD regions are higher in the consumer approach than in the producer approach. The results further indicate that, for the BRIC and rest of the world (RoW) regions, the carbon emission, land and water use are higher in the producer approach than in the consumer approach. © 2016 Elsevier Ltd

Abbas G.,Ghulam Ishaq Khan Institute of Engineering Sciences and Technology
Journal of Interconnection Networks | Year: 2016

This paper concerns the analysis of important algorithmic attributes, namely, the rate of convergence and scalability, and their impact on Network Utility Maximization (NUM). The contribution of the paper is a novel distributed rate control mechanism with strong convergence and scalability properties. The proposed algorithm employs a distinctive distributed framework, where rate control is derived as a Sequential Quadratic Programming (SQP) mechanism incorporated with interior-point and trust-region methods. The NUM problem is solved by a barrier method that penalizes any violation of constraints. Lagrangian is applied to the barrier objective function, where multipliers are estimated using Least-square method to iteratively solve the quadratic approximation of the Lagrangian function at the current point to generate a search direction. The uniqueness of the algorithm is that it allows sources to estimate bandwidth prices and thereby enforces a scalable network core by pushing algorithmic complexity to the edges. The fast convergence of the algorithm, in turn, improves the responsiveness of rate control and enables reduced buffer occupancy. The convergence of the proposed algorithm is proved theoretically and is evaluated via simulations. The results demonstrate reasonable reduction of computation-time in tracking the optimal rates and validate the strong convergence properties of the proposed algorithm. © 2016 World Scientific Publishing Company.

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.

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.

Shabbir G.,Ghulam Ishaq Khan Institute of Engineering Sciences and Technology | Khan H.,Ghulam Ishaq Khan Institute of Engineering Sciences and Technology
Romanian Journal of Physics | Year: 2014

A study of teleparallel conformal vector fields in Bianchi type I space-times in the teleparallel theory of gravitation is given by using the direct integration technique. From the above study it turns out that the dimensions of teleparallel conformal vector fields are 8, 9, 10 or 11. The case when the above space-times become FRW k = 0 model it admits eleven teleparallel conformal vector fields. This classification also covers the timelike version of plane symmetric space-times.

Shabbir G.,Ghulam Ishaq Khan Institute of Engineering Sciences and Technology | Khan S.,Ghulam Ishaq Khan Institute of Engineering Sciences and Technology
Modern Physics Letters A | Year: 2010

In this paper we classify cylindrically symmetric static spacetimes according to their teleparallel Killing vector fields using direct integration technique. It turns out that the dimension of the teleparallel Killing vector fields are 3, 4, 6 or 10 which are the same in numbers as in general relativity. In case of 3, 4 or 6 the teleparallel Killing vector fields are multiple of the corresponding Killing vector fields in general relativity by some function of r. In the case of 10 Killing vector fields the spacetime becomes Minkowski spacetime and all the torsion components are zero. The Killing vector fields in this case are exactly the same as in general relativity. Here we also discuss the Lie algebra in each case. It is important to note that this classification also covers the plane symmetric static spacetimes. © 2010 World Scientific Publishing Company.

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.

Ahmad M.,Ghulam Ishaq Khan Institute of Engineering Sciences and Technology
Communications in Computer and Information Science | Year: 2010

Cloud Computing is being projected by the major cloud services provider IT companies such as IBM, Google, Yahoo, Amazon and others as fifth utility where clients will have access for processing those applications and or software projects which need very high processing speed for compute intensive and huge data capacity for scientific, engineering research problems and also e- business and data content network applications. These services for different types of clients are provided under DASM-Direct Access Service Management based on virtualization of hardware, software and very high bandwidth Internet (Web 2.0) communication. The paper reviews these developments for Cloud Computing and Hardware/Software configuration of the cloud paradigm. The paper also examines the vital aspects of security risks projected by IT Industry experts, cloud clients. The paper also highlights the cloud provider's response to cloud security risks. © 2010 Springer-Verlag Berlin Heidelberg.

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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