26 research outputs found

    Static anti-windup compensator design for locally Lipschitz systems under input and output delays

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    This paper proposes a static anti-windup compensator (AWC) design methodology for the locally Lipschitz nonlinear systems, containing time-varying interval delays in input and output of the system in the presence of actuator saturation. Static AWC design is proposed for the systems by considering a delay-range-dependent methodology to consider less conservative delay bounds. The approach has been developed by utilizing an improved Lyapunov-Krasovskii functional, locally Lipschitz nonlinearity property, delay-interval, delay derivative upper bound, local sector condition, L2 gain reduction from exogenous input to exogenous output, improved Wirtinger inequality, additive time-varying delays, and convex optimization algorithms to obtain convex conditions for AWC gain calculations. In contrast to the existing results, the present work considers both input and output delays for the AWC design (along with their combined additive effect) and deals with a more generic locally Lipschitz class of nonlinear systems. The effectiveness of the proposed methodology is demonstrated via simulations for a nonlinear DC servo motor system, possessing multiple time-delays, dynamic nonlinearity and actuator constraints

    Consumer evaluation of brand extension: Pakistani Context

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    Brand extension strategy, based on the idea that the built-in value of the familiar brand name is transferable to new products. The major aim of this research paper was to find out that how consumer evaluate brand Extension. Authors have used four variables to establish the relationship with the dependent variable “consumer evaluation” of brand extension. The variables used in the study were listed as (1) Innovativeness (2) Multiple Brand extensions (3) Brand concept and consistency (4) Brand extension fit. In addition, four real life brands have been used as stimulus in this study. Questionnaire was developed and through Convenience sampling; it was administrated among sample population of 110. Regression analysis was used as statistical tool to analyze the relationship among dependent and independent variables. The findings showed that Consumer evaluation would be positive for those brand extensions that have a strong reputation for introducing multiple brands. Likewise, there was a positive relationship between consumer level of innovativeness and how consumer evaluates brand extension. Innovative consumers were more positive and favorably inclined towards brand extensions

    Significance of Internet Marketing in Promoting Consumer Goods in Subcontinent

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    The purpose of this article is to uncover the major factors that organizations consider when opting to add Internet Marketing as a part of their marketing communication mix found in the research. Especially now in Pakistan marketing tools and techniques are becoming either too expensive or just plain monotonous. The Internet as a new media is a perfect opportunity for Multinational and Local Consumer Organizations to exploit this type of tool for reaching their customers. This article will try to understand what exact role Internet Marketing has in affecting the processes, image, and brands of a company learned from the research. We will determine the various aspects that can be measured to see the success or failure of Pakistani Consumer Goods Industry in utilizing this new technique

    Consumer evaluation of brand extension: Pakistani Context

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    Brand extension strategy, based on the idea that the built-in value of the familiar brand name is transferable to new products. The major aim of this research paper was to find out that how consumer evaluate brand Extension. Authors have used four variables to establish the relationship with the dependent variable “consumer evaluation” of brand extension. The variables used in the study were listed as (1) Innovativeness (2) Multiple Brand extensions (3) Brand concept and consistency (4) Brand extension fit. In addition, four real life brands have been used as stimulus in this study. Questionnaire was developed and through Convenience sampling; it was administrated among sample population of 110. Regression analysis was used as statistical tool to analyze the relationship among dependent and independent variables. The findings showed that Consumer evaluation would be positive for those brand extensions that have a strong reputation for introducing multiple brands. Likewise, there was a positive relationship between consumer level of innovativeness and how consumer evaluates brand extension. Innovative consumers were more positive and favorably inclined towards brand extensions

    Consumer evaluation of brand extension: Pakistani Context

    Get PDF
    Brand extension strategy, based on the idea that the built-in value of the familiar brand name is transferable to new products. The major aim of this research paper was to find out that how consumer evaluate brand Extension. Authors have used four variables to establish the relationship with the dependent variable “consumer evaluation” of brand extension. The variables used in the study were listed as (1) Innovativeness (2) Multiple Brand extensions (3) Brand concept and consistency (4) Brand extension fit. In addition, four real life brands have been used as stimulus in this study. Questionnaire was developed and through Convenience sampling; it was administrated among sample population of 110. Regression analysis was used as statistical tool to analyze the relationship among dependent and independent variables. The findings showed that Consumer evaluation would be positive for those brand extensions that have a strong reputation for introducing multiple brands. Likewise, there was a positive relationship between consumer level of innovativeness and how consumer evaluates brand extension. Innovative consumers were more positive and favorably inclined towards brand extensions

    MoO3 altered ZnO: A suitable choice for the photocatalytic removal of chloro-acetic acids in natural sunlight exposure

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    The MoO3 coated ZnO photocatalysts were synthesized for the optimum harvesting of the absorbed ultraviolet sunlight photons by initially permeating Mo6+ ions at the surface of pre-synthesized ZnO and finally transformed to MoO3 by thermal treatment in the air. The absorption spectra of the synthesized powders revealed the extension of the absorption edge in the visible region whereas, the photoluminescence spectroscopy established the supporting role of the MoO3 coating in gradually plummeting the excitons recombination. The growth of additional peaks in Raman as well as X-ray photoelectron spectra and the appearance of the corresponding low-intensity reflection substantiated the surface prevalence of MoO3. The absence of the individual particles of MoO3 in FESEM and the verification of coated layer by HRTEM images validated the authenticity of the adopted synthetic route. The electrochemical evaluation of the synthesized powders under illumination revealed the complete elimination of photocorrosion and the synergic role of the MoO3 layer for improved trap and transfer of charge carriers. The evaluation of the flat-band potentials of the coated powders by Mott-Schottky analysis revealed the suitability of the conduction band edges for the generation of superoxide anion radicals. The photocatalytic activity of the synthesized powders was assessed for the removal of chloro derivatives (mono-, di-, trichloroacetic acids) in comparison to pure acetic acid. A significant effect of the stability, polarity and stereochemical structure of the substrate on the photocatalytic removal process was observed and discussed. The experimental evidences from the time-scale chemical analysis were interpreted for the identification of the reactive oxygen species (ROS) involved in the degradation/mineralization process. The validation of the Langmuir-Hinshelwood kinetic model was also examined. Efforts were made to estimate the plausible route of the degradation/mineralization process

    CMR measures of left atrial volume index and right ventricular function have prognostic value in chronic thromboembolic pulmonary hypertension

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    Providing prognostic information is important when counseling patients and planning treatment strategies in chronic thromboembolic pulmonary hypertension (CTEPH). The aim of this study was to assess the prognostic value of gold standard imaging of cardiac structure and function using cardiac magnetic resonance imaging (CMR) in CTEPH. Consecutive treatment-naive patients with CTEPH who underwent right heart catheterization and CMR between 2011 and 2017 were identified from the ASPIRE (Assessing-the-Specturm-of-Pulmonary-hypertensIon-at-a-REferral-center) registry. CMR metrics were corrected for age and sex where appropriate. Univariate and multivariate regression models were generated to assess the prognostic ability of CMR metrics in CTEPH. Three hundred and seventy-five patients (mean+/-standard deviation: age 64+/-14 years, 49% female) were identified and 181 (48%) had pulmonary endarterectomy (PEA). For all patients with CTEPH, left-ventricular-stroke-volume-index-%predicted (LVSVI%predicted) (p = 0.040), left-atrial-volume-index (LAVI) (p = 0.030), the presence of comorbidities, incremental shuttle walking test distance (ISWD), mixed venous oxygen saturation and undergoing PEA were independent predictors of mortality at multivariate analysis. In patients undergoing PEA, LAVI (p < 0.010), ISWD and comorbidities and in patients not undergoing surgery, right-ventricular-ejection-fraction-%predicted (RVEF%pred) (p = 0.040), age and ISWD were independent predictors of mortality. CMR metrics reflecting cardiac function and left heart disease have prognostic value in CTEPH. In those undergoing PEA, LAVI predicts outcome whereas in patients not undergoing PEA RVEF%pred predicts outcome. This study highlights the prognostic value of imaging cardiac structure and function in CTEPH and the importance of considering left heart disease in patients considered for PEA

    Chaotic Routing: An Overview

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    Of the many router designs, most can be classified as either oblivious or adaptive, depending on whether the path selection is statically determined based on the network topology, o
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