COMSATS Institute of Information Technology, also known by its acronym CIIT, is a public research university in Pakistan. It is a multi-campus institute with its headquarters located in the urban area of Islamabad. It is ranked among the top 5 universities of Pakistan as of the latest ranking released by the Higher Education Commission of Pakistan. From its day of creation to this day, the university has managed to create 7 ISO 9001:2008 certified campuses throughout the nation. Additional plans are underway to create an overseas campus in the Gulf. Wikipedia.
Ghafoor F.,COMSATS Institute of Information Technology
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2011
We propose a three-level atomic system where quantum coherence is generated by a classical standing-wave field coupled to the two upper excited decaying levels. Quantum coherence results in cancellation of the spontaneously emitted spectral lines depending on the choice of the phase of the standing wave. We exploit this phenomenon for precision measurement of the atomic position in the standing wave. Measurement of the conditional position probability distribution shows one to eight peaks per unit wavelength of the standing wave. Only one controllable parameter, that is, the phase of the driving standing wave, is enough to control these atomic positions. Along with the other results, the result of obtaining a single peak is remarkable as it enhances the efficiency of our system by a factor of 8. © 2011 American Physical Society.
Ali M.I.,COMSATS Institute of Information Technology
Applied Soft Computing Journal | Year: 2012
The basic aim of this paper is to discuss the idea of reduction of parameters in case of soft sets. It is studied that there is an approximation space of Pawlak associated with a soft set. A very simple technique is developed here to materialize the notion reduction of parameters. © 2012 Elsevier B.V. All rights reserved.
Khan S.,COMSATS Institute of Information Technology
Annals of Physics | Year: 2014
The dynamics of tripartite entanglement of fermionic system in noninertial frames through linear contraction criterion when one or two observers are accelerated is investigated. In one observer accelerated case the entanglement measurement is not invariant with respect to the partial realignment of different subsystems and for two observers accelerated case it is invariant. It is shown that the acceleration of the frame does not generate entanglement in any bipartite subsystems. Unlike the bipartite states, the genuine tripartite entanglement does not completely vanish in both one observer accelerated and two observers accelerated cases even in the limit of infinite acceleration. The degradation of tripartite entanglement is fast when two observers are accelerated than when one observer is accelerated. It is shown that tripartite entanglement is a better resource for quantum information processing than the bipartite entanglement in noninertial frames. © 2014 Elsevier Inc.
Al-Rashida M.,COMSATS Institute of Information Technology |
Iqbal J.,Forman Christian College
Medicinal Research Reviews | Year: 2014
The modulatory role of extracellular nucleotides and adenosine in relevance to purinergic cell signaling mechanisms has long been known and is an object of much research worldwide. These extracellular nucleotides are released by a variety of cell types either innately or as a response to patho-physiological stress or injury. A variety of surface-located ecto-nucleotidases (of four major types; nucleoside triphosphate diphosphohydrolases or NTPDases, nucleotide pyrophosphatase/phosphodiesterases or NPPs, alkaline phosphatases APs or ALPs, and ecto-5′-nucleotidase or e5NT) are responsible for meticulously controlling the availability of these important signaling molecules (at their respective receptors) in extracellular environment and are therefore crucial for maintaining the integrity of normal cell functioning. Overexpression of many of these ubiquitous ecto-enzymes has been implicated in a variety of disorders including cell adhesion, activation, proliferation, apoptosis, and degenerative neurological and immunological responses. Selective inhibition of these ecto-enzymes is an area that is currently being explored with great interest and hopes remain high that development of selective ecto-nucleotidase inhibitors will prove to have many beneficial therapeutic implications. The aim of this review is to emphasize and focus on recent developments made in the field of inhibitors of ecto-nucleotidases and to highlight their structure activity relationships wherever possible. Most recent and significant advances in field of NTPDase, NPP, AP, and e5NT inhibitors is being discussed in detail in anticipation of providing prolific leads and relevant background for research groups interested in synthesis of selective ecto-nucleotidase inhibitors. © 2013 Wiley Periodicals, Inc.
Noor K.I.,COMSATS Institute of Information Technology
Computers and Mathematics with Applications | Year: 2011
In this paper, we define and study some subclasses of analytic functions by using the concept of k-uniformly convexity. Several interesting properties, coefficients and radius problems are investigated. The behaviour of these classes under a certain integral operator is also studied. We indicate the relevant connections of our results with various known ones. © 2010 Elsevier Ltd. All rights reserved.