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Surface-type humidity sensor based on cellulose-PEPC for telemetry systems

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Journal of Semiconductors 2011年第1期32卷 103-107页

作者： Kh.S.Karimov M.Saleem T.A.Qasuria M.farooq GIK Institute of Engineering Sciences and Technology physical Technical Institute Aini St.299/1Dushanbe734063Tajikistan

Au/cellulose-PEPC/Au surface-type humidity sensors were fabricated by drop-casting cellulose and poly-N-epoxypropylcarbazole （PEPC） blend thin films. A blend of 2wt% of each cellulose and PEPC in benzol was used for the deposition of humidity sensing films. Blend films were deposited on glass substrates with preliminary deposited surface-type gold electrodes. Films of different thicknesses of cellulose and PEPC composite were deposited by drop-casting technique. A change in electrical resistance and capacitance of the fabricated devices was observed by increasing the relative humidity in the range of 0-95% RH. It was observed that the capacitances of the sensors increase, while their resistances decrease with increasing the relative humidity. The sensors were connected to op-amp square wave oscillators. It was observed that with increasing the relative humidity, the oscillator＇s frequencies were also increased in the range of 4.2-12.0 kHz for 65μm thick film sample, 4.1-9.0 kHz for 88μm thick film sample, and 4.2-9.0 kHz for 210μm sample. Effects of film thickness on the oscillator＇s frequency with respect to humidity were also investigated. This polymer humidity sensor controlled oscillator can be used for short-range and long-range remote systems at environmental monitoring and assessment of the humidity level.

关键词： surface-type sensor: cellulose poly-N-epoxvoropylcarbazole humidity sensor controlled oscillator

Accretion on high derivative asymptotically safe black holes

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Chinese Physics C 2020年第6期44卷 154-161页

作者： M.Umar farooq Ayyesha K.Ahmed Rong-Jia Yang Mubasher Jamil DBS and H College of E and MENational University of Sciences and Technology(NUST)H-12IslamabadPakistan Department of Mathematics School of Natural Sciences(SNS)National University of Sciences and Technology(NUST)H-12IslamabadPakistan College of Physical Science and Technology Hebei UniversityBaoding 071002China Institute for Theoretical Physics and Cosmology Zhejiang University of TechnologyHangzhou 310023China

Asymptotically safe gravity is an effective approach to quantum *** is important to differentiate modified gravity,which is inspired by asymptotically safe *** this study,we examine particle dynamics near the improved version of a Schwarzschild black *** assume that in the context of an asymptotically safe gravity scenario,the ambient matter surrounding the black hole is of isothermal nature,and we investigate the spherical accretion of matter by deriving solutions at critical *** analysis of various values of the state parameter for isothermal test fluids,viz.,k=1,1/2,1/3,1/4 show the possibility of accretion onto an asymptotically safe black *** formulate the accretion problem as Hamiltonian dynamical system and explain its phase flow in detail,which reveals interesting results in the asymptotically safe gravity theory.

关键词： accretion black holes asymptotically safe gravity

Oxygen-incorporated MoS_(2) catalyst for remarkable enhancing piezocatalytic H_(2) evolution and degradation of organic pollutant

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Rare Metals 2023年第9期42卷 3034-3045页

作者： Xue-Er Ning Dian-Zeng Jia Shan-Hao Li Muhammad farooq Khan Ai-Ze Hao State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources College of ChemistryXinjiang UniversityUrumqi830017China Department of Electrical Engineering Sejong UniversitySeoul05006Republic of Korea

A highly efficient piezocatalyst of oxygen-incorporated Mo S_(2)(O-Mo S_(2)) was designed and successfully synthesized via facile modulation of hydrothermal process temperature ***,a superior piezocatalytic H_(2) evolution rate of 46.1μmol·g^(-1)·h^(-1)in pure water and921.0μmol·g^(-1)·h^(-1)in methanol solution is obtained on optimal O-MoS_(2)-180 (with a hydrothermal process temperature of 180℃),outperforming pristine Mo S_(2)and most of the reported other ***,piezocatalytic activity of O-MoS_(2) toward the degradation of organic pollutants depends on hydrothermal *** suitable temperature of O-Mo S_(2)-180 presents dramatically excellent piezocatalytic capacity compared with the pristine MoS_(2) for degradation of methylene blue (MB) *** reaction rate constant of O-Mo S_(2)-180 reaches to 54.6×10^(-3)min^(-1),which is nearly 18 and 4-folds in contrast with pristine MoS_(2) and O-Mo S_(2)-140 (with a hydrothermal process temperature of 140℃),***,it also manifests that O-MoS_(2)-180 endows relatively high degradation efficiency (84.6%within30 min) and excellent ***,it is also demonstrated that optimal O-MoS_(2) can dramatically promote charge carriers transport and ***,our theoretical calculation results suggest that the oxygenincorporated can modulate the surface electronic state,enhance active sites as well as optimize the hydrogen adsorption Gibbs free energy of MoS_(2),thus extremely boosting piezocatalytic ***,an innovative piezocatalytic mechanism is proposed to reveal and expound the relationship between piezocatalytic property and oxygen-incorporated role.

关键词： Oxygen-incorporated MoS_(2) Piezocatalytic H_(2)evolution Piezocatalytic degradation Charge carriers separation Piezocatalytic mechanism

Mass spectrometry detection of basic drugs in fast chiral analyses with vancomycin stationary phases

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Journal of Pharmaceutical Analysis 2018年第5期8卷 324-332页

作者： Hongyue Guo M.farooq Wahab Alain Berthod Daniel W.Armstrong Department of Chemistry and Biochemistry University of Texas at Arlington Institut des Sciences Analytiques CNRS Université de Lyon 1

Current trends in chiral analysis of pharmaceutical drugs are focused on faster separations and higher separation efficiencies, Core-shell or superficially porous particles （SPP） based chiral stationary phases （CSPs） provide reduced analysis times while maintaining high column efficiencies and sensitivity. In this study, mobile phase conditions suitable for chiral analyses with electrospray ionization LC-MS were systematically investigated using vancomycin as a representative CSP. The performance of a 2.7 μm SPP based vancomycin CSP （SPP-V） 10 cm ×0.21 cm column was compared to that of a corresponding 5 μm fully porous particles based analogue column. The results demonstrated that the SPP-V column provides higher efficiencies, 2-5 time greater sensitivity and shorter analysis time for a set of 22 basic pharma- ceutical drugs. The SPP-V was successfully applied for the analysis of the degradation products of racemic citalopram whose enantiomers could be selectively identified by MS.

关键词： Mass spectrometry detection Chiral separation Basic drugs Beta-blockers Superficially porous particle Fully porous particle Fast separation Vancomycin

Beta through the prism of wavelets

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Financial Innovation 2018年第1期4卷 256-273页

作者： Aasif Shah Arif Tali Qaiser farooq Indian Institute of Technology Madras ChennaiIndia Department of Statistics Pondicherry UniversityKalapetIndia.

In this paper,we empirically show how wavelet decomposition can provide an easy vehicle to study the systematic risk properties of return series to serve as protocol for different traders who view the market with different time *** using the separate catalogue of Large Cap,Mid Cap and Small Cap stocks comprising S&P BSE-500 index of Indian capital market,we report that the conventional beta coefficients estimated from CAPM are essentially an average of wavelet betas but the later provides a resolution more appropriate and hence need to be considered in a realistic risk assessment of ***,the wavelet beta coefficients for Large Cap stocks are found more stable than Mid and Small capitalized *** paper is the first attempt of its kind to link the underlying methodology across different capitalized stocks to identify the precise beta in a complex market behavior.

关键词： CAPM Beta Wavelet

Binary phase solid-state photopolymerization of acrylates： design, characterization and biomineralization of 3D scaffolds for tissue engineering

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Frontiers of Materials Science 2017年第4期11卷 307-317页

作者： Inamullah MAITLO Safdar ALI Muhammad Yasir AKRAM farooq Khurum SHEHZAD Jun NIE State Key Laboratory of Chemical Resource Engineering & Beijing Laboratory of Biomedical Materials Beijing University of Chemical Technology Beijing 100029 China

Porous polymer scaffolds designed by the cryogel method are attractive materials for a range of tissue engineering applications. However, the use of toxic cross- linker for retaining the pore structure limits their clinical applications. In this research, acrylates （HEA/PEGDA, HEMA/PEGDA and PEGDA） were used in the low-temperature solid-state photopolymerization to produce porous scaffolds with good structural retention. The morphology, pore diameter, mineral deposition and water absorption of the scaffold were characterized by SEM and water absorption test respectively. Elemental analysis and cytotoxicity of the biomineralized scaffold were revealed by using XRD and MTT assay test. The PEGDA-derived scaffold showed good water absorption ability and a higher degree of porosity with larger pore size compared to others. XRD patterns and IR results confirmed the formation of hydroxyapatite crystals from an alternative socking process. The overall cell proliferation was excellent, where PEGDA-derived scaffold had the highest and the most uniform cell growth, while HEMAJPEGDA scaffold showed the least. These results suggest that the cell proliferation and adhesion are directly proportional to the pore size, the shape and the porosity of scaffolds.

关键词： binary phase solid-state photopolymerization phase separation tissue engineering biomineralization MTT

Impact of climate change on sediment yield for Naran watershed,Pakistan

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International Journal of Sediment Research 2016年第3期31卷 212-219页

作者： farooq Azim Abdul Sattar Shakir Habib-ur-Rehman Afshan Kanwal Centre of Excellence in Water Resource Engineering(CEWRE) University of Engineering & Technology(UET) Government College University CEWRE UET Department of Civil Engineering UET

In this paper,the site-specific impact of climate change on sediment yield has been assessed for the Naran watershed,*** data has been gathered for period 1961-2010 and HaDCM3 GCM predictors of SRES scenarios A2 and B2 have been *** precipitation and temperature time series have been statistically downscaled for time horizon 2011-2040 and *** data show both increasing and decreasing changes with respect to the *** sediment yield for future related to climate change has been *** results show that the both snowy and monsoon seasonal stream discharges are expected to *** will lead to increase in annual suspended sediment ***-wise,a less discharge and more sediment yield are expected during the early *** study concluded that the climate change and variability are influencing the watershed,and suspended sediment yield is likely to increase in the future.

关键词： Climate change Downscaling Hydrologic modeling Suspended sediment yield SHETRAN

Magneto-hydrodynamic flow of squeezed fluid with binary chemical reaction and activation energy

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Journal of Central South University 2019年第5期26卷 1362-1373页

作者： S.AHMAD M.farooq N.A.MIR Aisha ANJUM M.JAVED Department of Mathematics and Statistics Riphah International University

The present exploration is conducted to describe the motion of viscous fluid embedded in squeezed channel under the applied magnetics *** processes of heat and mass transport incorporate the temperature-dependent binary chemical reaction with modified Arrhenius theory of activation energy function which is not yet disclosed for squeezing flow *** flow,heat and mass regime are exposed to be governed via dimensionless,highly non-linear,ordinary differential equations (ODEs) under no-slip walls boundary conditions.A well-tempered analytical convergent procedure is adopted for the solutions of boundary value problem.A detailed study is accounted through graphs in the form of flow velocity field,temperature and fluid concentration distributions for various emerging parameters of enormous ***-friction,Nusselt and Sherwood numbers have been acquired and disclosed through *** results indicate that fluid temperature follows an increasing trend with dominant dimensionless reaction rate σ and activation energy parameter ***,an increment in σ and E parameters is found to decline in fluid *** current study arises numerous engineering and industrial processes including polymer industry,compression and injection shaping,lubrication system,formation of paper sheets,thin fiber,molding of plastic *** the area of chemical engineering,geothermal engineering,cooling of nuclear reacting,nuclear or chemical system,bimolecular reactions,biochemical process and electrically conducting polymeric flows can be controlled by utilizing magnetic *** by such applications,the proposed study has been developed.

关键词： squeezing flow magneto-hydrodynamics (MHD) activation energy binary chemical reaction

Process Discovery and Refinement of an Enterprise Management System

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Computer Systems Science & Engineering 2023年第3期44卷 2019-2032页

作者： Faizan Ahmed Khan farooq Ahmad Arfat Ahmad Khan Chitapong Wechtaisong COMSATS University Islamabad Lahore54000Pakistan Sunaree University of Technology Nakhon Ratchasima30000Thailand

The need for the analysis of modern businesses is rapidly increasing as the supporting enterprise systems generate more and more *** data can be extremely valuable for executing organizations because the data allows constant monitoring,analyzing,and improving the underlying processes,which leads to the reduction of cost and the improvement of the *** mining is a useful technique for analyzing enterprise systems by using an event log that contains *** research focuses on the process discovery and refinement using real-life event log data collected from a large multinational organization that deals with coatings and *** investigating and analyzing their order handling pro-cesses,this study aims at learning a model that gives insight inspection of the processes and performance ***,the animation is also performed for the better inspection,diagnostics,and compliance-related questions to specify the *** configuration of the system and the conformance checking for further enhancement is also addressed in this *** achieve the objectives,this research uses process mining techniques,*** discovery in the form of formal Petri nets models with the help of process maps,and process refinement through conformance checking and ***,the identified executed process is reconstructed by using the process discovery *** the reconstruction,we perform a deep analysis for the underlying process to ensure the process improvement and ***,some recommendations are made to improve the enterprise management system processes.

关键词： Process mining enterprise management system business process management process discovery conformance analysis process enhancement