scispace - formally typeset
Search or ask a question
Institution

Ghulam Ishaq Khan Institute of Engineering Sciences and Technology

EducationTopi, Pakistan
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: Quantum efficiency & Diode. The organization has 618 authors who have published 940 publications receiving 10674 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: The results suggested that the Al bond layer and inhomogeneous residual stresses negatively affected the adhesion of AlN to a substrate such as silicon.
Abstract: The present study investigated the influence of nanoscale residual stress depth gradients on the nano-mechanical behavior and adhesion energy of aluminium nitride (AlN) and Al/AlN sputtered thin films on a (100) silicon substrate. By using a focused ion beam (FIB) incremental ring-core method, the residual stress depth gradient was assessed in the films in comparison with standard curvature residual stress measurements. The adhesion energy was then quantified by using a nanoindentation-based model. Results showed that the addition of an aluminum layer gave rise to additional tensile stress at the coating/substrate interface, which can be explained in terms of the differences of thermal expansion coefficients with the silicon substrate. Therefore, the coatings without the Al layer showed better adhesion because of a more homogeneous compressive residual stress in comparison with the coating having the Al layer, even though both groups of coatings were produced under the same bias voltage. Results are discussed, and some general suggestions are made on the correlation between coating/substrate property combinations and the adhesion energy of multilayer stacks. The results suggested that the Al bond layer and inhomogeneous residual stresses negatively affected the adhesion of AlN to a substrate such as silicon.

19 citations

Journal ArticleDOI
02 Apr 2018-PLOS ONE
TL;DR: It is proved through various analysis techniques that the proposed scheme enhances the cipher security level, extensively, using the algebra of Galois field in Fresnelet domain.
Abstract: In this paper, a unique and more distinctive encryption algorithm is proposed. This is based on the complexity of highly nonlinear S box in Flesnelet domain. The nonlinear pattern is transformed further to enhance the confusion in the dummy data using Fresnelet technique. The security level of the encrypted image boosts using the algebra of Galois field in Fresnelet domain. At first level, the Fresnelet transform is used to propagate the given information with desired wavelength at specified distance. It decomposes given secret data into four complex subbands. These complex sub-bands are separated into two components of real subband data and imaginary subband data. At second level, the net subband data, produced at the first level, is deteriorated to non-linear diffused pattern using the unique S-box defined on the Galois field [Formula: see text]. In the diffusion process, the permuted image is substituted via dynamic algebraic S-box substitution. We prove through various analysis techniques that the proposed scheme enhances the cipher security level, extensively.

19 citations

Journal ArticleDOI
TL;DR: In this paper, the indentation fracture toughness of bulk metallic glass alloys in the partially crystalline composite state has been studied and corner cracking was observed on indentation in all the compositions above a certain critical load.
Abstract: Indentation fracture toughness of (Fe0·5Co0.5)69 − xNb6B25 + x (x = 0, 2, 4) bulk metallic glass alloys in the partially crystalline (intrinsic composite) state has been studied. Corner cracking was observed on indentation in all the compositions above a certain critical load. High hardness with values in excess of 1100HV was obtained for all the alloy compositions. Indentation fracture toughness measured through various empirical relations was found to be

19 citations

Proceedings ArticleDOI
20 Apr 2011
TL;DR: Using the solution of vector potential wave equation in fractional space, a novel generalized procedure for solution of radiation problems in fractionAL space is proposed and classical results are recovered.
Abstract: The present study deals with solution of antenna radiation problems in fractional dimensional space. Using the solution of vector potential wave equation in fractional space, we propose a novel generalized procedure for solution of radiation problems in fractional space. As an application we study the fields radiated by Hertzian dipole in α-dimensional fractional space. For all investigated solutions when integer dimension is considered, the classical results are recovered.

19 citations

Journal ArticleDOI
TL;DR: In this paper, the main concern of non-degradability and adverse environmental impact of the polymer matrices is discussed, which is a common concern for many polymer composites.
Abstract: Polymer composites are an important class of materials widely being used for many applications. But the main concern of non-degradability and adverse environmental impact of the polymer matrices an...

19 citations


Authors

Showing all 626 results

NameH-indexPapersCitations
Wajid Ali Khan128127279308
Shuichi Miyazaki6945518513
Muhammad Zubair5180610265
Mohammad Islam441929721
Asifullah Khan381925109
Muhammad Waqas323837336
Rana Abdul Shakoor301403244
Noor Muhammad291602656
Abdul Majid282313134
Muhammad Abid273773214
Iftikhar Ahmad261432500
Shaheen Fatima24792287
Ghulam Hussain241271937
Zubair Ahmad241451899
Muhammad Zahir Iqbal231291624
Network Information
Related Institutions (5)
Quaid-i-Azam University
16.8K papers, 381.6K citations

88% related

Nanjing University of Aeronautics and Astronautics
37.3K papers, 438.8K citations

86% related

Beihang University
73.5K papers, 975.6K citations

85% related

Nanjing University of Science and Technology
36.3K papers, 525.4K citations

85% related

King Fahd University of Petroleum and Minerals
24K papers, 443.8K citations

85% related

Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20235
20229
2021180
2020154
2019100
201863