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Asif Ali Khan,Umair Baig 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.6
PVC supported membranes of polyaniline–titanium(IV)phosphate (PANI–TiP) cation exchange nanocomposite were prepared by solution casting method in different stoichiometric ratios of PVC and PANI–TiP. The structure and morphology of the prepared membrane were ascertained by FTIR, SEM and TGA–DTA. The membrane having a composition 1:1 (PVC:PANI–TiP) shows best results for electrical conductivity, water content, porosity, thickness and swelling. The Pb(II) selective electrode was developed by using this membrane for the determination of lead in solutions. The membrane electrode was mechanically stable, having wide dynamic range, with quick response time and could be operated for at least 5 months.
Asif Ali Khan,Shakeeba Shaheen 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.26 No.-
Polyaniline–Zr(IV)molybdophosphate (PAZMP) was synthesized by sol–gel mixing of polyaniline (PANI) into the inorganic precipitate Zr(IV)molybdophosphate (ZMP). The physico-chemical properties of the material were characterized by using XRD, TGA, FTIR, SEM and TEM. Distribution studies for various metal ions revealed that the composite is highly selective for Ni2+. Its selectivity was examined by achieving some important binary separations of metal cations which indicatesits utility in environmental pollution control. Ion-exchange kinetics for few divalent metal ions was evaluated by particle diffusion-controlled ion- exchange phenomenon at different temperatures. Some physical parameters like D0, Ea and DS0 have been evaluated under favoring a particle diffusion-controlled mechanism.
Quality of Experience Assessment of Calling Services in Social Network
Asif Ali Laghari,Mureed Ali Laghari 한국통신학회 2021 ICT Express Vol.7 No.2
The majority of social network (SN) users are using calling service in SN to build communication across the countries, so the live communication between users requires too much network resource to decrease roughness in audio and video calls. So to improve the quality of service SN provider needs user experience so to assess the quality of experience (QoE) of calling service in SN we selected three popular SNs Facebook, hangout, and Wechat. We used a questionnaire to collect QoE of calling service in SN using the mobile network (MN) and broadband Network (BN). Results show users were satisfied from audio call service of Wechat on BN service and user satisfaction level was excellent of video quality for Wechat video calls using BN and ratings for voice quality in video call were good in the hangout on BN and MN internet.
Asif Ali Khan,Umair Baig,Mohd. Khalid 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.4
Electrically conductive polyaniline-titanium(IV)molybdophosphate (PANI-TMP) cation exchange nanocomposite was studied as sensing material for aliphatic alcohols (methanol, ethanol and 1-propanol) at room temperature. The nanocomposite was synthesized by sol–gel mixing of polyaniline (PANI) into inorganic precipitate of titanium(IV)molybdophosphate (TMP) and characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction analysis (XRD), thermogravimetric analysis (TGA) and ultravioletvisible spectroscopy (UV-Vis). The composite showed good ion-exchange capacity, electrical conductivity and resistivity response towards alcohol vapours. It was observed that the sensor show good reversible response towards methanol vapours compared to ethanol and 1-propanol vapours. These studies suggest that the nanocomposite cation exchanger could be a good sensing material for methanol vapours at room temperature (25 8C).
Asif Ali Khan,Leena Paquiza 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.22 No.-
Preparation, characterization, and evaluation of conducting nature of nano-ordered material has beendone by sol–gel mixing of an electrical conducting polymer polyaniline into the matrices of inorganicprecipitate zirconium tungstoiodophosphate. The physico-chemical property was determined usingTGA–DTA, FTIR, X-ray, and SEM studies. The results of physical properties were found progressive interms of their specific properties. Electrical conductivity determined by four-in-line probe methodshows semi-conducting range, i.e., 10 3–10 2 S cm 1. Sensitivity and selectivity was explored by itsadsorption efficiency towards heavy metal ions. Proposed material was selective for copper, a heavytoxic metal ion indicating its utility in decreasing pollution load.
Asif Ali Khan,Leena Paquiza 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
The kinetics and mechanism for the ion-exchange processes like Mg(II)–H(I), Ca(II)–H(I), Sr(II)–H(I),Ba(II)–H(I), Ni(II)–H(I), Cu(II)–H(I), Mn(II)–H(I) and Zn(II)–H(I) at different temperatures usingapproximated Nernst–Plank equation under the particle diffusion controlled phenomenon werestudied for the polypyrrole zirconiumtitanium phosphate nanocomposite cation exchanger. TEM provesthe formation of the nanocomposite cation exchanger. Some physical parameters, i.e. fractionalattainment of equilibrium UðtÞ, self-diffusion coefficients (D0), energy of activation (Ea) and entropy ofactivation (DS8) have been estimated. These results are useful for predicting the ion exchange processoccurring on the surface of this cation-exchanger.
Strong commutativity preserving mappings on semiprime rings
Asif Ali,Muhammad Yasen,Matloob Anwar 대한수학회 2006 대한수학회보 Vol.43 No.4
LetR be a semiprime ring and f be an endomorphismon R. Iff is a strong commutativity preserving (simply, scp) mapon a non-zero ideal U ofR, thenf is commuting on U.
Investigation of Junction-less Tunneling Field Effect Transistor (JL-TFET) with Floating Gate
Ali, Asif,Seo, Dongsun,Cho, Il Hwan The Institute of Electronics and Information Engin 2017 Journal of semiconductor technology and science Vol.17 No.1
This work presents a novel structure for junction-less tunneling field effect transistor (JL-TFET) with a floating gate over the source region. Introduction of floating gate instead of fixed metal gate removes the limitation of fabrication process suitability. The proposed device is based on a heavily n-type-doped Si-channel junction-less field effect transistor (JLFET). A floating gate over source region and a control-gate with optimized metal work-function over channel region is used to make device work like a tunnel field effect transistor (TFET). The proposed device has exhibited excellent ID-VGS characteristics, ION/IOFF ratio, a point subthreshold slope (SS), and average SS for optimized device parameters. Electron charge stored in floating gate, isolation oxide layer and body doping concentration are optimized. The proposed JL-TFET can be a promising candidate for switching performances.
STRONG COMMUTATIVITY PRESERVING MAPPINGS ON SEMIPRIME RINGS
Ali, Asif,Yasen, Muhammad,Anwar, Matloob Korean Mathematical Society 2006 대한수학회보 Vol.43 No.4
Let R be a semiprime ring and f be an endomorphism on R. If f is a strong commutativity preserving (simply, scp) map on a non-zero ideal U of R, then f is commuting on U.