Ghulam Ishaq Khan Institute of Engineering Sciences and Technology

About: Ghulam Ishaq Khan Institute of Engineering Sciences and Technology is a education organization based out in Topi, Pakistan. It is known for research contribution in the topics: Thin film & Quantum efficiency. The organization has 618 authors who have published 940 publications receiving 10674 citations.

Bi-clustering gene expression data using co-similarity

Abstract: We propose a new framework for bi-clustering gene expression data that is based on the notion of co-similarity between genes and samples Our work is based on a co-similarity based framework that iteratively learns similarity between rows using similarity between columns and vice-versa in a matrix The underlying concept, which is usually referred to as bi-clustering in the domain of bioinformatics, aims to find groupings of the feature set that exhibit similar behavior across sample subsets The algorithm has previously been shown to work well for document clustering in a sparse matrix representation We propose a variation of the method suited for analyzing data that is represented as a dense matrix and is non-homogenous as is the case in gene expression Our experiments show that, with the proposed variations, the method is well suited for finding bi-clusters with high degree of homogeneity and we provide empirical results on real world cancer datasets

Photovoltaic performance and impedance spectroscopy of a purely organic dye and most common metallic dye based dye-sensitized solar cells

Abstract: In this work, performances of an organic electron donor–π-bridge–electron acceptor (D–π–A) type RK1 dye and the most common metallic N719 dye based dye-sensitized solar cells (DSSCs) were compared. To gain insight into the behavior of these devices, current–voltage and impedance spectroscopic measurements were performed. From the current–voltage data, the parameters of cells including open-circuit voltage, short-circuit current, fill factor, solar energy-to-electricity conversion efficiency, series resistance, shunt resistance, and ideality factor were extracted. The RK1 based cell showed higher photovoltage, higher short-circuit current, solar energy-to-electricity conversion efficiency, higher shunt resistance and ideality factor. Using the Mott-Schottky plots, electrical properties of the cells were investigated and lower electron concentration was found for the RK1-DSSC. This high performance can be attributed to the higher absorption coefficient of the RK1 dye and relatively higher induced positive band-shift of the conduction band edge of the TiO2 semiconductor. The trends of the recombination resistance and the chemical capacitance as observed in the measured impedance spectra have also confirmed high photovoltaic performance of the RK1 based cell. Impedance spectra of the devices were observed both voltage and frequency dependent. At low frequencies, significant contribution of trap states was observed.

A comparative input-output analysis of the construction sector in three developing economies of South Asia

Abstract: Construction is commonly regarded as one of the major industries of an economy that is receiving a significant attention in the developing countries. This paper uses the Asian Development Bank (ADB...