Shuai Yue, Ben Niu, Huanqing Wang, Liang Zhang and Adil M. Ahmad
This paper aims to study the issues of adaptive fuzzy control for a category of switched under-actuated systems with input nonlinearities and external disturbances.
Abstract
Purpose
This paper aims to study the issues of adaptive fuzzy control for a category of switched under-actuated systems with input nonlinearities and external disturbances.
Design/methodology/approach
A control scheme based on sliding mode surface with a hierarchical structure is introduced to enhance the responsiveness and robustness of the studied systems. An equivalent control and switching control rules are co-designed in a hierarchical sliding mode control (HSMC) framework to ensure that the system state reaches a given sliding surface and remains sliding on the surface, finally stabilizing at the equilibrium point. Besides, the input nonlinearities consist of non-symmetric saturation and dead-zone, which are estimated by an unknown bounded function and a known affine function.
Findings
Based on fuzzy logic systems and the hierarchical sliding mode control method, an adaptive fuzzy control method for uncertain switched under-actuated systems is put forward.
Originality/value
The “cause and effect” problems often existing in conventional backstepping designs can be prevented. Furthermore, the presented adaptive laws can eliminate the influence of external disturbances and approximation errors. Besides, in contrast to arbitrary switching strategies, the authors consider a switching rule with average dwell time, which resolves control problems that cannot be resolved with arbitrary switching signals and reduces conservatism.
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Zhongwen Cao, Liang Zhang, Adil M. Ahmad, Fawaz E. Alsaadi and Madini O. Alassafi
This paper aims to investigate an adaptive prescribed performance control problem for switched pure-feedback non-linear systems with input quantization.
Abstract
Purpose
This paper aims to investigate an adaptive prescribed performance control problem for switched pure-feedback non-linear systems with input quantization.
Design/methodology/approach
By using the semi-bounded continuous condition of non-affine functions, the controllability of the system can be guaranteed. Then, a constraint variable method is introduced to ensure that the tracking error satisfies the prescribed performance requirements. Meanwhile, to avoid the design difficulties caused by the input quantization, a non-linear decomposition method is adopted. Finally, the feasibility of the proposed control scheme is verified by a numerical simulation example.
Findings
Based on neural networks and prescribed performance control method, an adaptive neural control strategy for switched pure-feedback non-linear systems is proposed.
Originality/value
The complex deduction and non-differentiable problems of traditional prescribed performance control methods can be solved by using the proposed error transformation approach. Besides, to obtain more general results, the restrictive differentiability assumption on non-affine functions is removed.
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Asad Ahmad, Obaidur Rahman and Mohammed Naved Khan
The purpose of this study is to explore the factors that help in building e-loyalty towards online retailers. Internet has brought the world market into a single platform…
Abstract
Purpose
The purpose of this study is to explore the factors that help in building e-loyalty towards online retailers. Internet has brought the world market into a single platform. Marketers have started using Internet as a new and innovative way to interact and reach people all around the world. With the increase in the number of Internet users, the number of e-marketers has also increased. In the context of online retailing, the service quality being offered is increasingly being used as a tool for competitive advantage. E-tailers are embracing superior e-services to attract, retain and convert patrons into loyal customers.
Design/methodology/approach
The researchers in the present study have used a research instrument that consists of constructs of the modified eTailQ scale, hedonism and e-satisfaction that together result in the formation of e-loyalty. Researcher-controlled sampling was employed to collect data from 159 student respondents.
Findings
Exploratory factor analysis, confirmatory factor analysis and structural equation modelling were applied for analysing the collected data. The results of the study demonstrate that major factors which help in the formation of e-loyalty are e-satisfaction, customer service, privacy and hedonism.
Originality/value
This study extends the understanding of the role of e-satisfaction, customer service, privacy and hedonism in the formation of loyal consumers. The researchers proposed a model to study the factors impacting the e-loyalty of the Internet shoppers in India. The findings of the study are expected to help both researchers and marketers.
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Bhavya Pande and Gajendra Kumar Adil
Sustainable manufacturing is gaining prominence in light of the rising environmental and social concerns worldwide. One major task to enhance manufacturing sustainability is…
Abstract
Purpose
Sustainable manufacturing is gaining prominence in light of the rising environmental and social concerns worldwide. One major task to enhance manufacturing sustainability is assessment of the current state of sustainability of a manufacturing firm. This paper reviews the existing sustainability assessment approaches applicable for manufacturing firms and observes that most of these approaches are not easy to apply for reasons such as high amount of skill, data and time requirement. Towards bridging this gap, this study proposes a sustainability assessment approach.
Design/methodology/approach
The assessment approach proposed in the paper uses a predefined list of potential sustainable manufacturing practices (SMPs) covering the primary and support activity domains of a manufacturing firm's value chain. It proposes a method to assess the extent of implementation of SMPs and identify associated drivers and barriers for each SMP area/category along the value chain of a firm as well as at overall firm level. A case study from textile industry is presented to demonstrate the utility of this approach.
Findings
The sustainability assessment approach adopted in this study uses less time and skills as well as ensures comprehensive coverage of SMPs. It provided valuable information to the management of the case company on how sustainable their practices are and why?
Originality/value
The study highlights the importance of sustainability assessment at SMP area/category level as well as explores practice area/category specific drivers and barriers. It provides a useful approach for a quick assessment of the current state of sustainability in manufacturing firms.
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Syed Adil Shah, Maqsood Hussain Bhutto and Sarwar M. Azhar
The purpose of this study is to integrate and synthesize the Islamic marketing literature, understand the phenomenon and related concepts and provide suggestions for future…
Abstract
Purpose
The purpose of this study is to integrate and synthesize the Islamic marketing literature, understand the phenomenon and related concepts and provide suggestions for future research.
Design/methodology/approach
The study uses an integrative review method that emphasizes summarizing and synthesizing the previous literature related to a phenomenon.
Findings
The findings indicate the emergence of five major themes, namely, Islamic marketing and its perspectives, activities in Islamic marketing, opportunities, controversies and challenges in Islamic marketing, Islamic principles and determinants of consumers’ behavior and awareness toward Islamic products. Each of the major themes consists of sub-themes discussed in detail in the results and discussion sections.
Research limitations/implications
Like other studies, this integrative literature review has some limitations. These include the methodology undertaken, the lack of explanation of inter-relationship among themes and lack of Islamic theory-based review. These limitations lead to future research directions.
Practical implications
Marketing managers need a thorough understanding of the Islamic standards and need to develop strategies. Further, there are inter-differences among Muslims, which need to be thoroughly understood by managers. Moreover, marketers can effectively use advertising in creating awareness and increasing demand of halal products.
Originality/value
This study provides an integrative review of the literature and synthesizes the Islamic marketing literature, which has not been done before.
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Arham Adnan, Asad Ahmad and Mohammed Naved Khan
The purpose of this paper is to identify what lifestyles best explain and impact ecological behavior among young Indian consumers.
Abstract
Purpose
The purpose of this paper is to identify what lifestyles best explain and impact ecological behavior among young Indian consumers.
Design/methodology/approach
This paper adapts the lifestyle scale developed by He et al. (2010) and the Actual Commitment scale to the Indian context to describe its impact on the young consumer’s ecological profile. The study is based on an extensive literature review. The data were obtained from a questionnaire handed out to a sample of 250 students. With the information obtained, and after the scale validation process, a structural equation analysis has been conducted.
Findings
Findings of the study highlight that environmental patterns and lifestyle factors are those that best characterize the ecological market segment. This group of young consumers is characterized by their self-identity and a feeling of uniqueness. They are people who always try to improve themselves and take actions which pose a new challenge for them. They are also characterized by having an ecological lifestyle, selecting and recycling products and taking part in events to protect the environment. This type of consumer is a present and future investment for firms that are committed to the environment.
Originality/value
The results of this study might interest consumer behavior researchers and those firms that care about the ecological consumers. Moreover, previous studies have not dealt with young consumers. Further research is needed including new psychographic variables.
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Adil Khan, Abdul Saboor Mohammad and Shahaliza Muhammad
This study aims to develop, propose and test an integrated framework of brand love and brand experience in the context of halal industry. Particularly, this study investigates the…
Abstract
Purpose
This study aims to develop, propose and test an integrated framework of brand love and brand experience in the context of halal industry. Particularly, this study investigates the relationship of brand experience and brand love concepts with several outcome variables such as brand trust, brand satisfaction, brand loyalty purchase intention and word of mouth.
Design/methodology/approach
A structured questionnaire has been constructed using scales from past studies. Hypotheses have been tested using partial least square structural equation modelling methodology.
Findings
This study has found that brand experience is a significant determinant of brand love. Further, brand love has a significant influence on trust, satisfaction and loyalty. Both variables, brand experience and brand love, have either direct or indirect influences on several branding-related outcome variables such as brand trust, brand satisfaction and brand loyalty.
Research limitations/implications
This study has been conducted only using cross-sectional sample of one country, which may limit the generalisations. However, the results of this study offer valuable insights for the brand managers in the halal sector.
Originality/value
Previous studies pertaining to halal food consumption have focussed more on understanding the attitude or the buying intention of the consumers. Only few studies have attempted to investigate the branding aspect of halal food consumption. This study is one of its kinds, which offers a comprehensive framework by incorporating important brand-related antecedents and outcome variables to understand the branding aspect of the halal food consumption behaviour.
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Mohd Nasir, Yaisna Rajkumari and Mohd Adil
To build long-term relationships and gain a competitive edge, marketers need to provide customers with unique and distinct experiences that they cannot find in other companies…
Abstract
Purpose
To build long-term relationships and gain a competitive edge, marketers need to provide customers with unique and distinct experiences that they cannot find in other companies. According to the literature, after-sales service helps to achieve these goals. By modeling the linkages between after-sales service, service quality, customer attitude and purchase intention, this study aims to understand how customers perceive after-sales service in decision-making in kitchen appliance industry.
Design/methodology/approach
Through purposive sampling, 324 respondents, primarily female, answered a structured questionnaire about their perception of after-sales service for kitchen appliance products. Previously well-established, validated scale measures from the extant literature were used. The responses were gathered using a seven-point Likert scale.
Findings
According to the findings, after-sales service quality is vital in kitchen appliance buying decisions. Accordingly, the higher the quality of service perceived by the customer, the more favorable the brand's attitude and purchase intention will be. Additionally, brand reputation was found to be an essential moderator between customer attitude and purchase intention, suggesting that the reputation of the kitchen appliance brand plays a positive and significant role in consumers’ purchase intentions.
Originality/value
It is well known that after-sales service plays a crucial role in current business scenarios, but empirical research on kitchen appliances has been scarce. This study aims to fill a void in the existing literature by investigating the relationships between after-sales service, after-sales service quality, customer attitude and purchase intention in the domain of kitchen appliances.
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Asad Ahmad, Mohammed Naved Khan and Obaidur Rahman
Internet is both a medium and a platform for information exchange. This characteristic of internet is gradually metamorphosing it into an e-learning enabler. A significant…
Abstract
Purpose
Internet is both a medium and a platform for information exchange. This characteristic of internet is gradually metamorphosing it into an e-learning enabler. A significant percentage of internet users access health-related information through the medium of internet, but little is known about the factors that determine such behaviour. This study aims to explore the factors that determine the behaviour of those seeking health-related information in the virtual world.
Design/methodology/approach
The present study analyses the role of perceived ease of usefulness (PEOU), perceived usefulness (PU), self-efficacy (SE) and information quality (IQ) on the intention (IU) of the internet users to seek health-related information. Researcher-controlled sampling was used for data collection from 210 university students. Exploratory factor analysis (EFA), t-test and correlation have been used for data analysis.
Findings
The results of the study demonstrate that except SE, all other factors have a positive relationship with the intention of the users to seek health-related information. The findings suggest that PU and IQ overshadow PEOU in encouraging the users seeking such health-related information over the internet.
Originality/value
The present study extends the understanding of e-learning adoption associated with seeking health-related information. The researchers propose an extended technology acceptance model (TAM) model to study the factors influencing the use of internet in seeking health-related information by the students enrolled in medical and non-medical courses.
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Zahid Ashraf Wani and Adil Ahmad Sofi
This paper aims to gauge the visibility of open content available in different formats of select open courseware (OCW) repositories through prominent search engines.
Abstract
Purpose
This paper aims to gauge the visibility of open content available in different formats of select open courseware (OCW) repositories through prominent search engines.
Design/methodology/approach
Open content in three formats (pdf, audio and video) from four OCW repositories listed in the OCW consortium under the science and technology subject heading were searched through seven select search engines.
Findings
None of the selected OCW repositories are fully visible on the selected search engines. Visibility of OCW content varied from one search engine to the other and was affected by the format in which it is available. Google is the best search engine for retrieving OCW content, whereas OCWfinder – a specialized search engine for retrieving OCW – has performed dismally.
Research limitations/implications
The study demonstrates the need for enhancing the visibility of open content through using search engine optimization techniques.
Originality/value
The study intends to supply findings that could be used by stakeholders to improve the visibility of OCW repositories. It is an attempt to draw a comparison between search engines for their ability to index different formats of OCW in the selected repositories. Findings can be used by information professionals to brush their information hunting skills.