http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Saira Fatima,Renu Sharma,Faiza Asghar,Ajar Kamal,Amin Badshah,Heinz-Bernhard Kraatz 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.76 No.-
Three new ferrocene-based thioureas with different chain lengths were synthesized, characterized, andtested as surface active agent. To get insight of their various aspects of corrosion inhibition of mild steel in1 M HCl, various standard methods were employed i.e., weight loss, electrochemical impedancespectroscopy, polarization, FT-IR, scanning electron microscopy, and DFT. The results obtained from thesemethods clearly revealed the linear dependency of inhibition potential with the surface activity,concentration of inhibitor molecules as well as the temperature of the system. The theoretical resultswere found to be in close agreement with the experimental measurements.
Free vibration of cross-ply laminated plates based on higher-order shear deformation theory
Saira Javed,K.K. Viswanathan,M.D. Nurul Izyan,Z. A. Aziz,J.H. Lee 국제구조공학회 2018 Steel and Composite Structures, An International J Vol.26 No.4
Free vibration of cross-ply laminated plates using a higher-order shear deformation theory is studied. The arbitrary number of layers is oriented in symmetric and anti-symmetric manners. The plate kinematics are based on higher-order shear deformation theory (HSDT) and the vibrational behaviour of multi-layered plates are analysed under simply supported boundary conditions. The differential equations are obtained in terms of displacement and rotational functions by substituting the stress-strain relations and strain-displacement relations in the governing equations and separable method is adopted for these functions to get a set of ordinary differential equations in term of single variable, which are coupled. These displacement and rotational functions are approximated using cubic and quantic splines which results in to the system of algebraic equations with unknown spline coefficients. Incurring the boundary conditions with the algebraic equations, a generalized eigen value problem is obtained. This eigen value problem is solved numerically to find the eigen frequency parameter and associated eigenvectors which are the spline coefficients.The material properties of Kevlar-49/epoxy, Graphite/Epoxy and E-glass epoxy are used to show the parametric effects of the plates aspect ratio, side-to-thickness ratio, stacking sequence, number of lamina and ply orientations on the frequency parameter of the plate. The current results are verified with those results obtained in the previous work and the new results are presented in tables and graphs.
China and Pakistan in the Post-India-U.S. Nuclear Deal Scenario
( Saira Bano ) 한국국방연구원 2015 The Korean Journal of Defense Analysis Vol.27 No.1
Nuclear relations in South Asia cannot be fully analyzed without taking into account the China factor. After the May 1998 nuclear tests, a substantive amount of strategic literature has been focused on Indian and Pakistani nuclear postures and policies, respectively. However, their integral links with China in transforming South Asia’s nuclear environment remains one critical component that has not been adequately examined. Multifaceted cooperation, competition and conflict have engulfed this triangle since the India-U.S. nuclear deal. This deal has significantly increased India’s nuclear weapons capability, and hence exacerbated the security dilemma of Pakistan and China, which has important implications for the strategic stability in the region. This paper analyses the strategic implications of this deal for the nuclear triangle and argues that the nuclear triangle will remain complex with inherent risks as well as pose challenges to the region’s strategic stability. China-India-Pakistan nuclear strategies will be determined by the larger triangle of U.S.-China-India relations, which will define the politics of South Asia as well as the larger Asian landscape.
Vibration of antisymmetric angle-ply laminated plates under higher order shear theory
Saira Javed,Z. A. Aziz,K. Karthik,J. H. LEE,K.K. Viswanathan 국제구조공학회 2016 Steel and Composite Structures, An International J Vol.22 No.6
This paper deals with the analysis of vibration of antisymmetric angle-ply plates using spline method for higher order shear theory. Free vibration of laminated plates is addressed to show the capability of the present method in the vicinity of higher order shear deformation theory and simply supported edges of plates. The coupled differential equations are obtained in terms displacement and rotational functions. These displacement and rotational functions are approximated using cubic and quantic spline. A generalized eigenvalue problem is obtained and solved numerically for an eigenfrequency parameter and an associated eigenvector of spline coefficients. The antisymmetric angle-ply fiber orientation are taken as design variables. Numerical results enable us to examine the frequencies for various geometric and material parameters and accuracy and effectiveness of the proposed method is also verified by comparative study.
Free vibration analysis of composite cylindrical shells with non-uniform thickness walls
Saira Javed,K.K. Viswanathan,Z. A. Aziz 국제구조공학회 2016 Steel and Composite Structures, An International J Vol.20 No.5
The paper proposes to characterize the free vibration behaviour of non-uniform cylindrical shells using spline approximation under first order shear deformation theory. The system of coupled differential equations in terms of displacement and rotational functions are obtained. These functions are approximated by cubic splines. A generalized eigenvalue problem is obtained and solved numerically for an eigenfrequency parameter and an associated eigenvector which are spline coefficients. Four and two layered cylindrical shells consisting of two different lamination materials and plies comprising of same as well as different materials under two different boundary conditions are analyzed. The effect of length parameter, circumferential node number, material properties, ply orientation, number of lay ups, and coefficients of thickness variations on the frequency parameter is investigated.
Predictive Modelling of Colour Strength and Ink Penetration (%) of Inkjet-Printed Cotton
Saira Faisal,Aurelio Tronci 한국섬유공학회 2018 Fibers and polymers Vol.19 No.7
Recent times have seen a rising interest in inkjet printing of textiles due to potential benefits it offers over conventional printing methods such as lean set-up costs and enabling cost effective short runs. The growing interest has made pretreatment of fabric to be the subject of much recent research. The aim of the study was to develop a model which can predict the colour strength and ink penetration (%) of inkjet-printed cotton as a function of pre- and post- treatment process variables. The independent variables investigated were concentration of thickener, urea, and alkali and steaming time. The experimental plan was based on the full factorial design. Predictive models were constructed by modelling the values of the independent variables and their coefficient of regression. It can be concluded that most significant predictor affecting the colour strength was concentration of urea followed by concentration of thickener; whereas, for ink penetration (%), the most influential predictor was concentration of thickener followed by concentration of urea and steaming time. The adequacy of predictive models was evaluated by analysis of variance, coefficient of determination (R2) and residual analysis and found to be accurate at 95 % confidence level.