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Search Results: 1 - 10 of 418 matches for " Maahd Shahzad "
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Adapting a Database of Text Messages to a Mobile-Based Weight Loss Program: The Case of the Middle East
Selma Limam Mansar,Shashank Jariwala,Nawal Behih,Maahd Shahzad,Aysha Anggraini
International Journal of Telemedicine and Applications , 2014, DOI: 10.1155/2014/658149
Abstract: Obesity has become a worldwide epidemic. Qatar, a rapidly developing country in the Middle East, has seen a sharp increase in the prevalence of obesity. The increase can be attributed to several reasons, including sedentary lifestyles imposed by a harsh climate and the introduction of Western fast food. Mobile technologies have been used and studied as a technology to support individuals’ weight loss. The authors have developed a mobile application that implements three strategies drawn from proven theories of behavioral change. The application is localized to the cultural context of its proposed users. The objective of this paper is to present a method through which we adapted the messaging content of a weight loss application to the context of its users while retaining an effective degree of automation. The adaptation addressed body image, eating and physical exercise habits, and regional/cultural needs. The paper discusses how surveying potential users can be used to build a profile of a target population, find common patterns, and then develop a database of text messages. The text messages are automated and sent to the users at specific times of day, as suggested by the survey results. 1. Introduction Tackling the weight issue is a significant undertaking. Worldwide, the number of obese people has doubled in the past 20 years [1]. We explored ways in which mobile technologies can be adapted to meet environmental and cultural norms and thereby support individuals in their effort to lose weight. In this paper, we examine the case of the Middle East through the example of Qatar. According to the International Association for the Study of Obesity, the numbers for obesity for the Qatari population are alarming. The association ranks the country sixth on its list of the most obese countries worldwide. The numbers presented in [2] (cited by [3]) were overwhelming: for the 25–65 age group, 34.6% of the men were obese and 34.3% were overweight. For females in the same age group, 45.3% were obese and 33% were overweight. The figures are also alarming for children: [4] (cited by [3]) found that in the 12–17 age group, 28.7% of boys were overweight and 7.6% were obese. Additionally, 20.3% of the girls in the same age group were overweight and 4.5% were obese. A more recent study in Qatar [5] suggests slightly lower figures among children of 2–19 years old, but still a much higher percentage than the current 16.9% for American children in this age group as reported by the National Health and Nutrition Examination Survey (NHANES) [6]. Despite this disparity, the
Adoption of Electronic Supply Chain Management and E-Commerce by Small and Medium Enterprises and Their Performance: A Survey of SMEs in Pakistan  [PDF]
Shahzad Ahmad Khan, Yan Liang, Sumaira Shahzad
American Journal of Industrial and Business Management (AJIBM) , 2014, DOI: 10.4236/ajibm.2014.49051
Abstract: Adoption of E-Commerce and Electronic Supply Chain Management (E-SCM) by small and medium enterprises (SMEs) has developed a tremendous performance in business process. SMEs in Pakistan are trying to enhance their competences by adopting a new technology to enter into the global market. The survey was aimed to investigate the current status and future direction of the adoption and benefits of E-Commerce and E-SCM by small and medium enterprises in Pakistan. A mailed questionnaire survey was conducted to collect data from 210 SMEs as samples located in Karachi, Gujranwala and Faisalabad, Pakistan. The results suggest that E-Commerce and E-SCM adoption has a significant, positive influence on SMEs, who have significantly higher average sales growth rate, on-time order management and delivery process than non-adopters. The findings of this study can be useful for SMEs in general as a means of understanding how E-Commerce and E-SCM adoption positively affects the firm’s performance.
An Empirical Study of Perceived Factors Affecting Customer Satisfaction to Re-Purchase Intention in Online Stores in China  [PDF]
Shahzad Ahmad Khan, Yan Liang, Sumaira Shahzad
Journal of Service Science and Management (JSSM) , 2015, DOI: 10.4236/jssm.2015.83032
Abstract: Online stores (e-stores) are growing in China. Consumers perceive some factors affecting their satisfaction to re-purchase intention in e-stores. This study investigates the perceived factors affecting customer satisfaction to re-purchase intention in e-stores. The satisfaction toward the online stores channel environment depends on the customer’s perception and also online consumer experiences (OCEs) of the active online shopping stores. From a questionnaire survey, 302 usable data are obtained and hypotheses are tested using multiple regression analysis. The analysis suggests that seven constructs—price, convenience, product information, return policy, financial risk, product risk and delivery risk—are significant with customer satisfaction to re-purchase in e-stores. This study emphasizes that the importance of customer satisfaction provides more benefits and less risk to re-purchase in e-stores. The finding of this study will help e-store’s managers/ owners to understand customer’s perceptions in online shopping stores and their satisfaction.
A Comprehensive Review of Protection Schemes for Distributed Generation  [PDF]
Umair Shahzad, Sohrab Asgarpoor
Energy and Power Engineering (EPE) , 2017, DOI: 10.4236/epe.2017.98029
Abstract: Due to the increasing demand of energy and the need for nonconventional energy sources, distributed generation (DG) has come into play. The trend of unidirectional power flow has been gradually shifting. With new technology comes new challenges, the introduction of DG into the conventional power system brings various challenges; one of the major challenges is system protection under DG sources. These sources pose a significant challenge due to bidirectional flows from DGs as well as lower fault current contribution from inverter interfaced DGs. This paper reviews existing protection schemes that have been suggested for active distribution networks. Most of these protection strategies apply only to smaller distribution systems implying that they may need to be extended to larger systems with a much higher penetration of distributed generation. In the end, a potential protection scheme has also been recommended as a future work.
Synchronization and Antisynchronization of a Planar Oscillation of Satellite in an Elliptic Orbit via Active Control
Mohammad Shahzad
Journal of Control Science and Engineering , 2011, DOI: 10.1155/2011/816432
Abstract: We have investigated the synchronization and antisynchronization behaviour of two identical planar oscillation of a satellite in elliptic orbit evolving from different initial conditions using the active control technique based on the Lyapunov stability theory and the Routh-Hurwitz criteria. The designed controller, with our own choice of the coefficient matrix of the error dynamics that satisfy the Lyapunov stability theory and the Routh-Hurwitz criteria, is found to be effective in the stabilization of the error states at the origin, thereby, achieving synchronization and antisynchronization between the states variables of two nonlinear dynamical systems under consideration. The results are validated by numerical simulations using mathematica. 1. Introduction In the last two decades, considerable research has been done in nonlinear dynamical systems and their various properties. One of the most important property of nonlinear dynamical systems is synchronization, which classically represents the entrainment of frequencies of oscillators due to weak interactions [1–3]. Studies in this field are partly motivated by experimental realization in lasers, electronic circuits, plasma discharge, and chemical reactions [2–4]. Synchronization techniques have been improved in recent years, and many different methods are applied theoretically as well as experimentally to synchronize the chaotic systems. Some of them are nonlinear feedback method [5], adaptive control method [6], antisynchronization method [7], sliding mode control method [8], and chaos synchronization using active control, which is introduced in [9] is one of these methods. Notable among these methods, chaos synchronization using active control scheme has recently been widely accepted as an efficient technique to synchronize the chaotic systems. The reason is because it can be used to synchronize identical as well as nonidentical systems; a feature that gives it an advantage over other synchronizing methods. This method based on the Lyapunov stability theory and the Routh-Hurwitz criteria to active control in order to achieve stable synchronization has been applied to many practical systems such as the electronic circuits, which model a third-order “jerk” equation [10], Lorenz, Chen, and Lü system [11], geophysical systems [12], nonlinear equations of acoustic gravity waves (Lorenz-Stenflo system) [13], Van-der Pol-Duffing oscillator [14], forced damped pendulum [15], nuclear magnetic resonance modeled by the Bloch equations [16], parametrically excited oscillators [17], permanent magnet
On $ R $-subcommuting maps and best approximations in Banach spaces
Naseer Shahzad
Tamkang Journal of Mathematics , 2001, DOI: 10.5556/j.tkjm.32.2001.51-53
Abstract: A result on best approximation is proved in Banach spaces satisfying Opial's condition. Recent results of Jungck and Sessa [Math. Japonica, 42(1995), 249-252.] are extended to a new class of noncommuting maps.
Personality and Gender as Predictors of Academic Choices: A Comparative Study of Business and Non-Business Students
Khuram Shahzad
International Journal of Management and Organizational Studies , 2013,
Abstract: The impact of personal factors on academic and professional preferences has been the topic of a number of researches. But there is a dearth of studies on comparative analysis of such traits with reference to academic choices of business and non-business students. This study aims to identify if gender and personality explain difference in business and non-business students’ academic programs choices. 254 undergraduate students from schools of business and economics (business) and schools of engineering and technology (non-business) responded to this survey. Results revealed the significant impact of big five personality traits on students’ selection of business or non-business degree programs. Students from business major scored high for extroversion and emotional stability, but they scored low on agreeableness, conscientiousness, and openness. The difference in business and non-business academic preferences in terms of gender was also found significant
Concentric Diversification is a New Product Offering or Cannibalization. A Descriptive Study.
International Review of Management and Business Research , 2012, DOI: 20/12/2012
Abstract: The large firms of the world offer multiple related products for three major reasons. First to provide variety to their consumers, second to capture maximum market share and third to build competitive pressure. But problem arise that does the firms really become successful in their efforts. Firms offer the new products as a variety offering or either competition pressure but the problem arise when the new product not positioned as a variety or either start competing with company old product so the concept of cannibalization started. For the purpose this research has conducted to find that does related products offered by some reputed firms in Peshawar Pakistan considered as a new variety offering, cannibalization or competition coverage. For research a sample of 100 respondents were contacted and a nominal scale non self administered questionnaire was used to collect data from them. For the analysis part of the study SPSS software was used to find the response of respondents through descriptive analysis and cross tabs analysis.
Control of Chaos in the Dynamics of Enceladus
Mohammad Shahzad
Advances in Natural Science , 2010, DOI: 10.3968/913
Abstract: We estimate a localized control term for the Hamiltonian of spin orbit dynamics of Enceladus. The aim is to modify the perturbation locally by a smaller and simple but robust control term which makes the controlled Hamiltonian more regular. Poincare surface of sections witnesses that the estimated control term is able to recreate invariant (KAM) tori without modifying other parts of phase space.Keywords: Chaos control; Poincare surface of section; Enceladus (Satellite)
The Professional Medical Journal , 2004,
Abstract: Introduction: Several diagnostic aids have been developed toimprove diagnosis in suspected appendicitis and to avoid negative appendicectomy. Objectives: Toevaluate modified, Alvarado scoring system in reducing rate of negative appendicectomy. Study Design: Aprospective study was conducted. Setting: Jinnah hospital Lahore. Period: January 2003 to July 2003.Patients & Methods: 96 patients admitted with suspected diagnosis of appendicitis but with equivocalsigns were management according to modified Alvarado system. Results: Diagnosis of acute appendicitiswas made in 61 patients on the basis of scoring system. These patients were operated for appendicitis.Vermiform appendix was found to be acutely inflamed in all but 5 patients, giving a negativeappendicectomy rate of 8.2%. A clinical decision to operate leads to removal of a normal appendix in 15%to 30% of cases. Conclusions: Modified Alvarado’s scoring system did well in reducing negativeappendicectomy rate. It is not meant to replace clinical judgment, and is not considered a primary mean ofmaking a diagnosis of acute appendicitis.
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