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.

Design and analysis of capacitance based Bio-MEMS cantilever sensor for tuberculosis detection

Abstract: Recently, Micro Electro-Mechanical systems (MEMS) have been vital in molecular diagnosis. In this paper, micro-cantilever beam based bio-sensing system is designed and analyzed for the detection of bio-molecules. Modal and static analysis is performed to study the vibration frequencies and deflection of cantilever respectively. The surface of the cantilever is coated with the anti-bodies of the suspected antigen in a patient's blood. The anti-bodies are specific for specific antigens. Hence, the presence of mycobacterium tuberculosis in a suspected patient's blood is identified through the deflection of cantilever beam. The deflection of the beam is detected using capacitance method. 3D finite element analysis is performed to study the stability, sensitivity and modal frequencies of the cantilever beam(s). The modal frequencies are very important in vibration to voltage conversion of a capacitor for deflection detection. Fixed beam and stepped beam are also considered for comparison. The model is found to be cost effective as well as simple when compared to the conventional techniques like ELISA and PCR.

Photo-organic field effect transistor based on a metalloporphyrin

Abstract: We report the effect of light on the output characteristics of the organic field effect transistor fabricated by using the 5,10,15,20-Tetrakis(3 � ,5 � -di-tertbutylphenyl)porphyrinatocopper(II) (TDTPPCu) as a channel material and demonstrate light for controlling the drain‐source current instead of the gate voltage. Upon illumination, a detectable change in the drain‐source current was observed.

Interference Management in Ultra-Dense 5G Networks With Excessive Drone Usage

Abstract: In fifth generation (5G) networks, the densification of small base stations in the coverage region of macro base station (MBS) leads to significant inter-cell interference (ICI). Similarly, drones (a.k.a. unmanned aerial vehicles) have a diverse scope in multifarious 5G assisted applications and, therefore, cause considerable drones interference (DI) as a result of excessive drone usage. This paper investigates the bottleneck uplink (UL) coverage performance of the MBS edge users in the presence of ICI and DI. To mitigate both ICI and DI, we use an efficient resource allocation scheme known as reverse frequency allocation (RFA). Moreover, we use decoupled association (DeCA) in place of coupled association to further improve UL signal-to-interference ratio. The results depict that RFA in conjunction with DeCA overpass all other techniques in terms of improved UL coverage performance because of effective DI and ICI mitigation.

Relaxation behaviour of gasketed joints during assembly using finite element analysis

Abstract: Gasketed bolted flange pipe joints are always prone to leakage during operating conditions Therefore, performance of a gasketed flange joint is very much dependent on the proper joint assembly with proper gasket, proper gasket seating stress and proper pre-loading in the bolts of a joint For a gasketed flange joint, the two main concerns are the joint strength and the sealing capability To investigate these, a detailed three-dimensional nonlinear finite element analysis of a gasketed joint is carried out using gasket as a solid plate Bolt scatter, bolt bending and bolt relaxation are concluded as the main factors affecting the joint’s performance In addition, the importance of proper bolt tightening sequence, number of passes influence of elastic and elasto-plastic material modelling on joint performance are also presented A dynamic mode in a gasketed joint is concluded, which is the main reason for its failure