Zahid Hussain

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Three-dimensional topological insulators are a new state of quantum matter with a bulk gap and odd number of relativistic Dirac fermions on the surface. By investigating the surface state of Bi2Te3 with angle-resolved photoemission spectroscopy, we demonstrate that the surface state consists of a single nondegenerate Dirac cone. Furthermore, with(More)
Mobile phones have become full-featured mobile computers. Applications providing good user experience and taking full advantage of the increasing capabilities of mobile phones are still rare. One such application is audio and video on mobile phones which is expected to become a killer application in the near future. A lot of valuable audio and video content(More)
This paper investigates how the integration of agile methods and User-Centered Design (UCD) is carried out in practice. For this study we have applied grounded theory as a suitable qualitative approach to determine what is happening in actual practice. The data was collected by semi-structured interviews with the professionals who have already worked in the(More)
This study describes the effect of dietary levels of aflatoxin B1 (AFB1) and age of the birds upon the residue level in liver and muscles of broiler chicks. In three different experiments broiler chicks of 7, 14 and 28 days of age were kept for 7 days on contaminated rations having 1600, 3200 and 6400 μg/kg AFB1. AFB1 residues were detected earlier in(More)
Stroke is the commonest neurological cause of morbidity and mortality all over the world being the third leading cause of death. Estimation of stroke risks in population is not only helpful for healthcare providers but also important to identify persons at elevated risk and to select proper treatments in clinical trials. The aim of the present study was to(More)
In addition to a bulk energy gap, topological insulators accommodate a conducting, linearly dispersed Dirac surface state. This state is predicted to become massive if time reversal symmetry is broken, and to become insulating if the Fermi energy is positioned inside both the surface and bulk gaps. We introduced magnetic dopants into the three-dimensional(More)