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.

Limitations of Lung Segmentation Techniques

Abstract: High-resolution X-ray computed tomography (CT) is the standard for pulmonary imaging. Depending on the scanner hardware, CT can provide high spatial and high temporal resolution, excellent contrast resolution for the pulmonary structures and surrounding anatomy, and the ability to gather a complete three-dimensional (3D) volume of the human thorax in a single breath hold. Pulmonary CT images have been used for applications such as lung parenchyma density analysis, airway analysis, and lung and diaphragm mechanics analysis. A precursor to all of these quantitative analysis applications is lung segmentation. With the introduction of multi-slice spiral CT scanners, the number of volumetric studies of the lung is increasing, and it is critical to develop fast, accurate algorithms that require minimal to no human interaction to identify the precise boundaries of the lung. This paper presents the problem of inaccurate lung segmentation as observed in algorithms presented by researchers working in the area of medical image analysis. The different lung segmentation techniques have been tested using the data set of 9 patients consisting of a total of 413 CT scan slices. The slice thickness was 7.0 mm and the ages of patients varied from 30 to 73 years. We obtained data sets of patients from the Department of Radiology, Aga Khan Medical University Hospital, Karachi, Pakistan. After testing the algorithms against the data sets, the deficiencies of each algorithm have been highlighted.

Computational Intelligence-based Entertaining Level Generation for Platform Games

Abstract: With computers becoming ubiquitous and high resolution graphics reaching the next level, computer games have become a major source of entertainment. It has been a tedious task for game developers to measure the entertainment value of the computer games. The entertainment value of a game does depend upon the genre of the game in addition to the game contents. In this paper, we propose a set of entertainment metrics for the platform genre of games. The set of entertainment metrics is proposed based upon certain theories on entertainment in computer games. To test the metrics, we use an evolutionary algorithm for automated generation of game rules which are entertaining. The proposed approach starts with an initial set of randomly generated games and, based upon the proposed metrics as an objective function, guides the evolutionary process. The results produced are counterchecked against the entertainment criteria of humans by conducting a human user survey and a controller learning ability experimen...

A note on proper conformal vector fields in cylindrically symmetric static space-times

Abstract: A study of proper conformal vector field in non conformally flat cylindrically symmetric static space-times is given by using direct integration technique. Using the above mentioned technique we have shown that a very special class of the above space-time admits proper conformal vector field.

Influence of electron beam oscillation patterns on the microstructure, texture, residual stress and mechanical properties of Ti-5Al-2.5Sn alloy weldments:

Abstract: Vacuum electron beam welding is widely employed for the welding of titanium alloys using different beam oscillation patterns. Since these patterns influence the physical phenomenon in the weld pool...