IMRAN KHAN - Academia.edu (original) (raw)

Papers by IMRAN KHAN

Pakistan Heart Journal, Dec 19, 2012

ABSTRACT Myxoma is a common cardiac non-malignant tumour arising mostly from the left atrium (75%... more ABSTRACT Myxoma is a common cardiac non-malignant tumour arising mostly from the left atrium (75%), right atrium (10%) and the rest equally between right and left ventricles. Myxoma in the left ventricle is a very rare phenomenon. We describe the case of a 50yrs old patient who had left ventricular Myxoma presenting as stroke and subsequently resected successfully. The patient also underwent a CABG in the same setting. LV myxoma with coronary artery disease and presenting as stroke has not been described in medical literature to the best of our knowledge.

2009 16th International Conference on Systems, Signals and Image Processing, 2009

Abstract In this paper a novel cross layer mobility management scheme for IEEE 802.16 e standard ... more Abstract In this paper a novel cross layer mobility management scheme for IEEE 802.16 e standard is proposed using cellular IP (CIP) and fast mobile IPv6 (FMIPv6). The research focuses on the use of CIP for intra domain and FMIPv6 for inter domain mobility management. A cross layer design is considered to enable smooth integration of link layer triggers and their use for the benefit of network layer. The network model used is a hierarchical one, which allows integration of CIP and FMIPv6 into the IEEE 802.16 e, ...

Iranian Journal of Veterinary Research, 2016

Avian influenza (AI) is a highly contagious disease causing significant economic losses worldwide... more Avian influenza (AI) is a highly contagious disease causing significant economic losses worldwide. The aim of this study is to evaluate the effect of mannan-oligosaccharide (MOS) on tracheal and cloacal virus shedding in AI challenged broilers and contamination of environment with H9N2. A total of 300 1-day-old-broiler chicks were randomly divided into 3 groups (A, B and C) and supplemented 0.2, 0.5 and 0.0% MOS, respectively in NRC recommended diet for 36 days. On day 21 the groups were further split into two sub groups A+ve, A-ve, B+ve, B-ve, C+ve and C-ve with 5 replicates each. The positive groups were shifted to remote sheds and were challenged intranasally with 0.1 ml of reference virus (AIV; Pk-UDL/01/08 H9N2) with EID50 = 10-6.66. Treatment reduces (P<0.05) cloacal virus shedding from day 24 to 26 and 28 to 32. Tracheal virus shedding was lower (P<0.05) on days 25-26 and 28-30 in treatment groups. Day 27 showed highest (P>0.05) virus shedding in all groups. However ...

Sarhad Journal of Agriculture, 2016

The Agriculture sector continues to play a central role in Pakistan's economy. It is the second l... more The Agriculture sector continues to play a central role in Pakistan's economy. It is the second largest sector, accounting for over 21 percent of GDP, and remains by far the largest employer, absorbing 45 percent of the country's total labour force. Nearly 62 percent of the country's population resides in rural areas, and is directly or indirectly linked with agriculture for their livelihood. The Agriculture sector's strong linkages with the rest of the economy are not fully captured in the statistics. While on the one hand, the sector is a primary supplier of raw materials to downstream industry, contributing substantially to Pakistan's exports, on the other, it is a large market for industrial products such as fertilizer, pesticides, tractors and agricultural implements. Despite its critical importance to growth, exports, incomes, and food security, the Agriculture sector has been suffering from secular decline (Table 2.1). Growth in the sector, particularly in the crop subsector, has been falling for the past three decades. Productivity remains low, with yield gaps rising (Table 2.2). Critical investments in new seeds, farming technology and techniques, and the water infrastructure are not being made. Without major new investments in Agriculture, it is unclear how prepared Pakistan would be to tackle emerging challenges such as declining water availability, and climate change (for a fuller discussion, see Special Section at end of chapter).

Journal of Basic & Applied Sciences, 2015

Cutaneous leishmaniasis is still a big health problem around the world and drug resistance has em... more Cutaneous leishmaniasis is still a big health problem around the world and drug resistance has emerged as a major problem in treatment. The purpose of the study was to generate Amphotericin B resistant strainand evaluate the crude extract of Melia azedarach against wild and lab generated resistant strain of Leishmania tropica. The result obtained revealed that the continuous increase of drug pressure for 60 days cause resistance in L. tropica by 09 fold compared to wild type. The LC50 value recorded for wild and resistant type strain was 0.024 and 0.224µg/ml, respectively against Amp B drug. The antileishmanial activity of crude extract against wild and resistant type strain was 0.57 and 123.3 µg/ml for green fruit and 1220.8 and 4010.1µg/ml for ripe fruit, respectively. A significant difference (P

ABSTRACT The aim of the presented analysis is to review the transverse momentum physics in SPS CE... more ABSTRACT The aim of the presented analysis is to review the transverse momentum physics in SPS CERN, RHIC BNL and LHC CERN energies and investigate inclusive hadron production in π −12 C interactions at Pπ -=40GeV/c. We focus on pT dependence of the nuclear modification factor (R) for proton and charged π meson production. We demonstrate that the results are in agreement with the SPS and RHIC ones.

Biospectroscopy, 1999

Samples of human adult hemoglobin (HbA) encapsulated in a wet porous sol-gel are prepared under a... more Samples of human adult hemoglobin (HbA) encapsulated in a wet porous sol-gel are prepared under aerobic and anaerobic conditions. Resonance Raman spectroscopy is used to compare equilibrium deoxyHbA to the nonequilibrium deoxy species generated by deoxygenating an encapsulated oxyHbA sample. The spectra of the deoxygenated samples as a function of delay subsequent to deoxygenation reveal a marked slow down by the gel of the two phases of relaxation: the tertiary relaxation associated with the transition from the liganded R to deoxy R conformations and the quaternary relaxation associated with the deoxy R to deoxy T transition. The temperature dependence (4-80°C) of the relaxation indicates that the internal viscosity of the gel is greatly enhanced at the lower temperatures. At 80°C the tertiary and quaternary relaxations occur over minutes to hours, respectively, whereas at 4°C both relaxations are essentially frozen. These results demonstrate the impressive potential of using sol-gel encapsulation as a means of studying substrate binding induced conformational changes in proteins.

IET-UK International Conference on Information and Communication Technology in Electrical Sciences (ICTES 2007), 2007

Multi-Antenna systems are expected to play very important role in future multimedia wireless comm... more Multi-Antenna systems are expected to play very important role in future multimedia wireless communication systems. Such systems are predicted to provide tremendous improvement in spectrum utilization. In this paper we consider the capacity analysis of Multiple-Input Multiple-Output (MIMO) systems. Space-Time coding schemes are the practical signal design techniques to realize the information theoretic capacity limits of MIMO systems. Here the orthogonal space-time block codes are considered for the capacity and error probability analysis of MIMO systems as a case study. The numerical and simulation results obtained using MATLAB are presented for the Multi-antenna system channel capacity and bit-error probability in Rayleigh fading channels.

International Journal of Computer Applications, 2011

The idea of ad hoc networking is gaining importance as more and more dynamic routing protocols ha... more The idea of ad hoc networking is gaining importance as more and more dynamic routing protocols have been designed and a lot of research with state of the art network traffic simulator has been carried out. Routing protocols solve many problems of ad hoc networks. In this paper we are aiming to provide a performance comparison of three routing protocols i.e. ADV, AODV and DSDV. NCTUns 6.0 is used as a simulator. The performance metrics for evaluating the protocols are number of packet dropped, number of packet collision and throughput.

2009 International Conference on Wireless Communications & Signal Processing, 2009

... uplink The authors are with the Telecommunications, Asian Institute of Technol-ogy, Pathumtha... more ... uplink The authors are with the Telecommunications, Asian Institute of Technol-ogy, Pathumthani, 12120 Thailand e-mail: ({ muhammad.hasanain.chaudary,imran.khan, raza.ali.shah, rajath}@ait.ac.th). of an OFDMA system. ...

IOSR Journal of Agriculture and Veterinary Science, 2014

A series of Lab incubation experiments were conducted to assess the effect of different pHs (5.5.... more A series of Lab incubation experiments were conducted to assess the effect of different pHs (5.5., 7.0 and 8.5) and temperature ranges (25, 30 and 35 0 C) on the ability of indigenous algal species for removal of contaminants and other heavy metals, from artificial contaminated water during 2012-13. For this purpose, algal samples were collected from different areas in district Buner. Artificial contaminated waters were prepared and amended to pH 5.5, 7.0 or 8.5 using dilute alkali or acid and then each set was inoculated with mix culture of Microspora, Navicula, Chaetophora, Spirogyra, Apanothece, and Hydrodictyon as these were most abundant and common algal species in Buner. After inoculation, each set was incubated at 25, 30 or 35 o C for 10 days. The results obtained on the efficiency of indigenous algae collected from Buner to remove contaminants and other heavy metals from artificial wastewaters under different pH levels (5.5, 7.0 and 8.5) and temperature ranges (25, 30 and 35 0 C) showed that a mix culture of algae viz., Microspora, Navicula, Chaetophora, Spirogyra, Apanothece, and Hydrodictyon removed variable amount of heavy metals ranged from 37 % in case of Cu up to 96 % in case of Ni from wastewaters. The results revealed that change in pH between 5.5 and 8.5 and in temperature between 25 and 35 0 C had no remarkable influence on the efficiency of algae to remove these elements from contaminated water.

International Journal of Computer and Communication Engineering, 2013

Wireless Sensor Network (WSN) are becoming more challenging day by day; some of major challenges ... more Wireless Sensor Network (WSN) are becoming more challenging day by day; some of major challenges are security attacks, packet drops, high power consumptions, low battery backup and some connectivity problems, but the most significant problem is providing quality service under harsh environments, where sensor nodes, facing several problems such as batteries of sensor nodes not working properly, when temperature goes to very low in winter, reliability of monitoring system, energy and power losses etc, hence performance of network degrades greatly. By applying an Efficient Network Management Scheme (ENMS), we can handle these major drawbacks thus our network working accurately even in harsh environments. In this paper we have discussed Security, Fault and Performance management related issues in Wireless Sensor Network.

2009 NORCHIP, 2009

AbstractThis paper presents a hardware design of an SVD based channel estimator. The details of ... more AbstractThis paper presents a hardware design of an SVD based channel estimator. The details of the design are explained and some key aspects are discussed. The design has been implemented and tested on an FPGA and synthesized for an ASIC in 130 nm technology. It is shown ...

Physica B: Condensed Matter, 2010

... 4]; MR Min, JH Kim, EK Kim, YK Kim, JS Ha, KT Kim; J. Korean Phys. Soc., 49 (3) (2006), p. 10... more ... 4]; MR Min, JH Kim, EK Kim, YK Kim, JS Ha, KT Kim; J. Korean Phys. Soc., 49 (3) (2006), p. 1097. ... 8]; JE Kim, SJ Kim, HW Choi, YS Yang, Ki. Ohshima; J. Korean Phys. Soc., 46 (1) (2005), p. 52. ...

Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, 2007

Choice of substrate used for analog complementary metal-oxide-semiconductor ͑CMOS͒ technologies i... more Choice of substrate used for analog complementary metal-oxide-semiconductor ͑CMOS͒ technologies impacts device performance and fabrication yields significantly. This study examines the impact of low-angle ͑Ͻ5°͒ off-axis Si͑100͒ substrate rotated around ͗110͘ axis and 0°Si͑100͒ on-axis starting material on inline process control, parametric device performance, and ultimately fabrication yields. The interaction of thermal processes and silicon epitaxial growth process variation on inline photoalignment and its influence on device design and performance is discussed for both types of substrates. The device components include 3 and 5 V analog CMOS, lateral p-n-p bipolar transistor, junction field effect transistors, and drain extended transistors, DENMOS and DEPMOS, where the drain extensions are formed using well implants. The necessity to reintegrate silicon epitaxial growth, well photolithography and implants, Vt implants, and gate oxide process loop to accommodate substrate crystal orientation changes will be presented. A novel front-end-of-the-line integration scheme to improve interwafer and intrawafer electrical distributions with excellent transistor matching and 1 / f noise performance for aforementioned device components will also be discussed in this context.

Journal of Pharmacy and Pharmacology, 2010

Objective The purpose of this study was to observe the effect of an alcoholic extract of Cicer mi... more Objective The purpose of this study was to observe the effect of an alcoholic extract of Cicer microphyllum (I3M/38/A001) (whole plant without seeds and flowers) on the immunological parameters of sheep red blood cell immunized normal and chronically stressed Swiss albino mice. Methods Estimation of T-cell subsets (CD3+, CD4+/CD8+), CD80/CD86, CD28, CD 69, costimulatory molecules and Th1/Th2 cytokines was carried out using a flow cytometer. This was followed by study of the delayed type hypersensitivity response, in-vitro lymphocyte proliferation assay and measurement of Th1/Th2 cytokines in isolated peripheral blood mononuclear cells by flow cytometry. An enzyme immune assay was used to analyse corticosterone levels in the serum of chronically stressed animals. Key findings We found that oral administration of I3M/38/A001once daily at the graded doses of 6.25, 12.5, 25, 50, 100 and 200 mg/kg p.o. enhanced the proliferation and differentiation of T lymphocytes in sheep red blood cel...

Journal of Network and Computer Applications, 1998

... Regular Article. Adaptive information agents using competitive learning. Imran Khan and Howar... more ... Regular Article. Adaptive information agents using competitive learning. Imran Khan and Howard C Card. Microelectronics and Software Systems Lab, Department of Electrical and Computer Engineering, University of Manitoba, Winnipeg (Manitoba), R3T 5V6, Canada. ...

Journal of Geophysical Research, 2011

Kashmir earthquake ruptured an out-of-sequence Himalayan thrust known as the Balakot-Bagh thrust.... more Kashmir earthquake ruptured an out-of-sequence Himalayan thrust known as the Balakot-Bagh thrust. The earthquake's hypocenter was located at a depth of 15 km on the ramp close to a possible ramp/flat transition. In the weeks following the earthquake a GPS network was installed to measure postseismic displacement. The initial measurements in November 2005 were followed by other campaigns in January and

Journal of Elastomers & Plastics, 2010

The effect of sodium sulfate as filler on viscosity, tack, and adhesion properties of Standard Ma... more The effect of sodium sulfate as filler on viscosity, tack, and adhesion properties of Standard Malaysian Rubber (SMR 10)-based pressure-sensitive adhesive were studied. Coumarone-indene resin and toluene were used as the tackifier and solvent respectively throughout the experiment. The results show that viscosity of adhesive increases with addition of sodium sulfate. For rolling ball tack test, the distance traveled by rolling ball decreases with increasing sodium sulfate concentration indicating the increase of tack value with sodium sulfate. The distance traveled by the rolling ball decreases with coating thickness of adhesive. For cross-hatch adhesion test, result shows that maximum adhesion occurs between 30 and 40 parts per hundred parts of rubber (phr) of sodium sulfate content, an observation which is attributed to the maximum of wettability of adhesive. The 60 μm of adhesive coating thickness shows good performance of adhesion property of SMR 10-based pressure-sensitive adhe...