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Interaction of tetradecyltrimethylammonium bromide with bovine serum albumin in different compositions: Effect of temperatures and electrolytes/urea

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Chinese Journal of Chemical Engineering 2021年第1期34卷 279-287页

作者： Joynal Abedin ShamimMahbub Mohammad Majibur Rahman Anamul Hoque Dileep Kumar javed masood khan Ahmed M.El-Sherbeeny Department of Chemistry Jahangirnagar UniversitySavarDhaka 1342Bangladesh Department of Chemistry&Physics Gono BishwabidyalaySavarDhaka 1344Bangladesh Department of Environmental Sciences Jahangirnagar UniversitySavarDhaka 1342Bangladesh 4 Division of Computational Phys ics Institute for Computational ScienceTon Duc Thang UniversityHo Chi Minh CityViet Nam Faculty of Applied Sciences Ton Duc Thang UniversityHo Chi Minh CityViet Nam Department of Food Science and Nutrition Faculty of Food and Agricultural SciencesKing Saud University2460Riyadh 11451Saudi Arabia Industrial Engineering Department College of EngineeringKing Saud UniversityP.O.Box 800Riyadh 11421Saudi Arabia

Herein,the interaction of a protein,bovine serum albumin(BSA),with tetradecyltrimethylammonium bromide(TTAB,a cationic surfactant),has been investigated using the conductivity measurement technique in pure water and some sodium salts(NaCl,Na_(2) SO_(4),Na_(2) CO_(3), and Na_(3) PO_(4)) solutions at temperature range of 295.15-320.15 *** reveal that,in the plot of specific conductivity versus the concentration of TTAB,only a single critical micelle concentration(cmc) was found for the TTAB+BSA mixed system in all solvents media *** addition of BSA in aqueous TTAB solution,the value of cmc undergoes a change from its pure form,which indicates the presence of strong interaction operating between the BSA and TTAB *** aqueous system,the cmc values of the TTAB+BSA mixtures are obtained higher compared to the values found for single TTAB surfactant However,the addition of salt decreases the cmc value of mixed TTAB+BSA *** values of cmc of the BSA+TTAB mixed system at 310.15 K and 1.00 mmol·kg^(-1) ionic strength of salt followed the order:cmc_(Na_(2) CO_(3))> Cmcc_(Na_(3) PO_(4))> cmcNaCl>cMC_(Na_(2) SO_(4)).The cmc values of TTAB+BSA mixture were found to be lowered in urea solution within the concentrations *** values of degree of dissociation(α) and fraction of counter ion binding(β) were found to be dependent on additives and *** free energy of micellization(AGm) is negative for all the systems,which manifests that the micellization phenomenon is energetically *** enhancement of the negative value of △G_(m)^(0) in aqueous salt solutions reveals an increase of spontaneity of the TTAB+BSA micellization *** values of △G_(m)^(0) also reveal that the spontaneity of micelle formation is enhanced at higher temperatures in all media *** values of free energy of transfer(△G_(m,t)^(o)) were also determined for numerous solvent media used in the present study and described with appropriate reasoning.

关键词： TTAB BSA Conductivity Electrolyte Exothermic interaction

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Machine Learning for QoS Optimization and Energy-Efficient in Routing Clustering Wireless Sensors

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Computers, Materials & Continua 2025年第1期82卷 327-343页

作者： Rahma Gantassi Zaki masood Yonghoon Choi Department of Electrical Engineering Chonnam National University Gwangju61186Republic of Korea

Wireless sensor network(WSN)technologies have advanced significantly in recent *** in WSNs,machine learning algorithms are crucial in selecting cluster heads(CHs)based on various quality of service(QoS)*** paper proposes a new clustering routing protocol employing the Traveling Salesman Problem(TSP)to locate the optimal path traversed by the Mobile Data Collector(MDC),in terms of energy and QoS *** bemore specific,to minimize energy consumption in the CH election stage,we have developed the M-T protocol using the K-Means and the grid clustering *** addition,to improve the transmission phase of the Low Energy Adaptive Clustering-Grid-KMeans(LEACH-G-K)protocol,the MDC is employed as an intermediary between the CH and the sink to improve the wireless sensor network(WSN)*** results of the experiment demonstrate that the M-T protocol enhances various Low Energy Adaptive Clustering protocol(LEACH)improvements such as the LEACH-G-K,LEACH-C,Threshold sensitive Energy Efficient Sensor Networks(TEEN),MDC maximum residual energy leach protocol.

关键词： LEACH-G-K MDC TSP QoS K-Means

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Formation control of quad-rotor UAV via PIO

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Science China(Technological Sciences) 2022年第2期65卷 432-439页

作者： BAI TingTing WANG DaoBo masood Rana javed College of Automation Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China Department of Electrical Engineering Usman Institute of TechnologyKarachi 75850Pakistan

In this article, the formation control of quad-rotor unmanned aerial vehicle(UAV) via pigeon inspired optimization(PIO) is designed. The nonlinear mathematical model of the quad-rotor UAV is used by applying algebraic graph theory and matrix analysis. A high order consistent formation control algorithm with fixed control topology is designed by using a position deviation matrix to describe its formation. To control the attitude of quad-rotor UAVs, it is difficult to obtain a set of optimal solutions, and hence a PIO based algorithm with variable weight hybridization is proposed. The algorithm is mainly composed of two parts. First, according to the distance between the particles in the iterative process, the inertia weight is dynamically changed,and the coefficient is adjusted to control the degree of influence on its inertia weight. Second, the overall scenario is designed by using MATLAB based simulations which show that the formation control of the quad-rotor UAV is achieved with the help of PIO.

关键词： pigeon inspired optimization formation control unmanned aerial vehicle and quad-rotor UAV

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Stokes' First Problem for an MHD Burgers Fluid

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Communications in Theoretical Physics 2013年第1期59卷 99-104页

作者： masood khan Department of Mathematics Quaid-i-Azam University

This work is related to the flow of a magnetohydrodynamic Burgers *** flow of an incompressible conducting Burgers fluid in the presence of a uniform transverse magnetic field over a plate that is moved suddenly is *** the application of the Laplace and Fourier sine transforms techniques,the exact analytical expressions for the velocity field and associated shear stress are determined in simple *** are written as a sum of steady-state and transient *** graphical results are plotted for different values of indispensable parameters and some interesting results are *** corresponding solutions for the hydrodynamic Burgers fluid appear as the limiting cases of the obtained solutions.

关键词： Stokes' first problem Burgers fluid Laplace and Fourier sine transforms exact solutions

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MHD Flow of an Oldroyd-B Fluid through a Porous Space Induced by Sawtooth Pulses

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Chinese Physics Letters 2011年第8期28卷 161-164页

作者： masood khan Zeeshan Department of Mathematics Quaid-i-Azam UniversityIslamabad 44000Pakistan

We investigate the unsteady magnetohydrodynamic(MHD)flow of an Oldroyd-B fluid through a porous space induced by sawtooth *** fluid is assumed to be electrically conducting in the presence of a transverse uniform magnetic *** porous space is taken into account using modified Darcy's law for the Oldroyd-B *** solutions of the governing problem are obtained by using the Laplace transform *** effects of the magnetic parameter,the permeability of the porous space and the elasticity parameter of the fluid are studied on the flow characteristics.

关键词： method field porous

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Cotton Leaf Diseases Recognition Using Deep Learning and Genetic Algorithm

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Computers, Materials & Continua 2021年第12期69卷 2917-2932页

作者： Muhammad Rizwan Latif Muhamamd Attique khan Muhammad Younus javed Haris masood Usman Tariq Yunyoung Nam Seifedine Kadry Department of Computer Science HITEC University TaxilaTaxilaPakistan Wah Engineering College University of WahWah Cantt47080Pakistan College of Computer Engineering and Sciences Prince Sattam Bin Abdulaziz UniversityAl-KhrajSaudi Arabia Department of Computer Science and Engineering Soonchunhyang UniversityAsanKorea Faculty of Applied Computing and Technology Noroff University CollegeKristiansandNorway

Globally,Pakistan ranks 4th in cotton production,6th as an importer of raw cotton,and 3rd in cotton *** 10%of GDP and 55%of the country’s foreign exchange earnings depend on cotton *** 1.5 million people in Pakistan are engaged in the cotton value ***,several diseases such as Mildew,Leaf Spot,and Soreshine affect cotton *** diagnosis is not a good solution due to several factors such as high cost and unavailability of an ***,it is essential to develop an automated technique that can accurately detect and recognize these diseases at their early *** this study,a new technique is proposed using deep learning architecture with serially fused features and the best feature *** proposed architecture consists of the following steps:(a)a self-collected dataset of cotton diseases is prepared and labeled by an expert;(b)data augmentation is performed on the collected dataset to increase the number of images for better training at the earlier step;(c)a pre-trained deep learning model named ResNet101 is employed and trained through a transfer learning approach;(d)features are computed from the third and fourth last layers and serially combined into one matrix;(e)a genetic algorithm is applied to the combined matrix to select the best points for further *** final recognition,a Cubic SVM approach was utilized and validated on a prepared *** the newly prepared dataset,the highest achieved accuracy was 98.8%using Cubic SVM,which shows the perfection of the proposed framework..

关键词： Plants diseases data augmentation deep learning features fusion features selection

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Effects of Thermal Radiation and Slip Mechanism on Mixed Convection Flow of Williamson Nanofluid Over an Inclined Stretching Cylinder

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Communications in Theoretical Physics 2019年第12期71卷 1405-1415页

作者： masood khan Aamir Hamid Hashim Department of Mathematics Quaid-i-Azam UniversityIslamabad 44000Pakistan Department of Mathematics&Statistics Riphah International UniversityIslamabadPakistan

The current investigation highlights the mixed convection slip flow and radiative heat transport of uniformly electrically conducting Williamson nanofluid yield by an inclined circular cylinder in the presence of Brownian motion and thermophoresis parameter.A Lorentzian magnetic body force model is employed and magnetic induction effects are *** governing equations are reduced to a system of nonlinear ordinary differential equations with associated boundary conditions by applying scaling group *** reduced nonlinear ordinary differential equations are then solved numerically by Runge-Kutta-Fehlberg fifth-order method with shooting *** effects of magnetic field,Prandtl number,mixed convection parameter,buoyancy ratio parameter,Brownian motion parameter,thermophoresis parameter,heat generation/absorption parameter,mass transfer parameter,radiation parameter and Schmidt number on the skin friction coefficient and local Nusselt are analyzed and *** is found that the velocity of the fluid decreases with decrease in curvature parameter,whereas it increases with mixed convection ***,the local Nusselt number decreases with an increase in the radiation *** numerical comparison is also presented with the existing published results and found that the present results are in excellent agreement which also confirms the validity of the present methodology.

关键词： MHD Williamson nanofluid velocity and thermal slip inclined stretching cylinder heat generation/absorption

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On the Exact Solution for Axisymmetric Flow and Heat Transfer over a Nonlinear Radially Stretching Sheet

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Chinese Physics Letters 2012年第8期29卷 168-171页

作者： Azeem Shahzad Ramzan Ali masood khan Department of Mathematics Quaid-i-Azam UniversityIslamabad 44000Pakistan

We investigate the boundary-layer flow and heat transfer of a magnetohydrodynamic viscous fluid over a nonlinear radially porous stretching sheet within a porous *** flow is generated due to a nonlinear stretching sheet and influenced by a continuous suction/blowing of the fluid through the porous *** governing momentum and thermal boundary layer equations are converted into ordinary differential equations by appropriate similarity *** exact solution for the velocity and the temperature fields are derived in the form of an incomplete Gamma *** analytic solutions are found by the homotopy analysis *** graphical results for velocity and temperature fields are presented and ***,the numerical values of the skin friction coefficient and the Nusselt number are calculated and discussed.

关键词： function stretching porous

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Effect of Zn doping on electronic structure and optical properties zincblende GaN(A DFT+U insight)

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Communications in Theoretical Physics 2021年第3期73卷 139-147页

作者： Muhammad Junaid Iqbal khan Zarfishan Kanwal masood Yousaf Hamid Ullah javed Ahmad Abid Latif Yong-Han Shin Ata Ur Rahman Khalid Laboratory of Theoretical and Experimental Physics Department of PhysicsBahauddin Zakariya UniversityMultan(60800)Pakistan Department of Civil Engineering Faculty of Engineering and TechnologyBahauddin Zakariya UniversityMultan60800Pakistan Department of Physics Division of Science and TechnologyUniversity of EducationTownshipLahore54770Pakistan Multiscale Materials Modelling Laboratory Department of PhysicsUniversity of UlsanUlsan44610Republic of Korea

The development of new materials,having exceptional properties in comparison to existing materials is highly required for bringing advancement in electronic and optoelectronic *** this fact,we investigated structural,electronic,and optical properties of zincblende GaN doped with selected Zn concentrations(6.25%,12.50%,and 18.70%),using the first-principle calculations based on density functional theory with GGA+*** conducted the entire study using the WIEN2K *** this study,we calculated various significant parametric quantities such as cohesive energies,formation energies,bulk moduli,and lattice constants along with the study of optical and electronic properties by substituting Ga atoms with Zn atoms in 1×2×2 *** structural stability is confirmed by studying the phonon dispersion curves which suggest that Zn:GaN material is stable against the 6.25%and 18.70%Zn concentrations while for 12.50%,it shows *** Hubbard values U=0,2,4,6 eV were added to GGA and the electronic properties were improved with the U=6 *** absorption was blue shifted while the refractive index and dielectric constant were increased with increasing the Zn *** properties are enhanced due to the prime contribution of cations(Zn)3ri *** optical and electronic properties are further discussed in detail in the entire study.

关键词： density functional theory(DFT) optoelectronics Ⅲ-Ⅴsemiconductors optical properties electronic properties structural properties

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Properties of Exponential Ratio Type Estimators in Equal Probability Sampling: A Simulation Study

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Communications in Mathematics and Statistics 2018年第1期6卷 91-118页

作者： Hina khan Muhammad Aslam masood Amjad khan Department of Statistics GC UniversityLahorePakistan Department of Statistics Faculty of ScienceKing Abdulaziz UniversityJeddah 21551Saudi Arabia

In this paper,the properties and goodness of fit of exponential ratio type estimatorproposedbykhanetal.(SciInt(Lahore)26(5):1897–1902,2014)havebeen carried out through *** has been shown that estimator is consistent;the con-vergence of mean and variance of the estimator are *** properties of some existing estimators based on simulation study have also been *** of fit test on the estimator has been carried out using Kolmogorov–Smirnov,Anderson–Darling,Cramer–von *** as normal,Student t,Weibull and Cauchy distributions are fitted on the *** best-fitted distribution on the estimator turned out to be normal distribution.

关键词： Goodness of fit Distribution Skewed Consistent Convergence

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