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Article
Publication date: 25 August 2023

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.

Details

Robotic Intelligence and Automation, vol. 43 no. 5
Type: Research Article
ISSN: 2754-6969

Keywords

Article
Publication date: 25 November 2022

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.

Details

Assembly Automation, vol. 42 no. 6
Type: Research Article
ISSN: 0144-5154

Keywords

Article
Publication date: 6 January 2021

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.

Details

International Journal of Productivity and Performance Management, vol. 71 no. 4
Type: Research Article
ISSN: 1741-0401

Keywords

Article
Publication date: 14 August 2017

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…

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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.

Details

Journal of Research in Interactive Marketing, vol. 11 no. 3
Type: Research Article
ISSN: 2040-7122

Keywords

Article
Publication date: 11 February 2021

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…

1121

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.

Details

Journal of Islamic Marketing, vol. 13 no. 6
Type: Research Article
ISSN: 1759-0833

Keywords

Article
Publication date: 20 November 2017

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.

2782

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.

Details

Young Consumers, vol. 18 no. 4
Type: Research Article
ISSN: 1747-3616

Keywords

Article
Publication date: 18 June 2020

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…

2970

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.

Details

Journal of Islamic Marketing, vol. 12 no. 8
Type: Research Article
ISSN: 1759-0833

Keywords

Article
Publication date: 20 November 2017

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.

Details

Interactive Technology and Smart Education, vol. 14 no. 4
Type: Research Article
ISSN: 1741-5659

Keywords

Article
Publication date: 6 June 2016

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.

Details

The Electronic Library, vol. 34 no. 3
Type: Research Article
ISSN: 0264-0473

Keywords

Article
Publication date: 14 November 2016

Muhammad Kashif Imran, Chaudhry Abdul Rehman, Usman Aslam and Ahmad Raza Bilal

In recent times, progression of technology and growing demands of customers have substantially influenced the services sector to introduce fast real-time mechanisms for providing…

7227

Abstract

Purpose

In recent times, progression of technology and growing demands of customers have substantially influenced the services sector to introduce fast real-time mechanisms for providing up-to-mark services. To meet these requirements, organizations are going to change their end-user operating systems but success rate of change is very low. The purpose of this paper is to address one of the practitioners’ complaint “no one tells us how to do it” and uncovers the indirect effects of knowledge management (KM) strategies: personalization and codification, toward organizational change via organizational learning and change readiness. The current study also highlights how organizational learning and change readiness are helpful to reduce the detrimental effects of organizational change cynicism toward success of a change process.

Design/methodology/approach

Temporal research design is used to get the appropriate responses from the targeted population in two stages such as pre-change (Time-1) and post-change (Time-2). In cumulative, 206 responses have been obtained from the banking sector of Pakistan.

Findings

The results of the current study are very promising as it has been stated that KM strategies have an indirect effect on successful organizational change through organizational learning and change readiness. Moreover, change cynicism has a weakening effect on a change process and can be managed through effective learning orientation of employees and developing readiness for change in organizations.

Research limitations/implications

Change agents have to use an optimal mix of personalization and codification strategies to develop learning environment and readiness for change in organizations that are beneficial for implementing a change successfully. Moreover, change readiness and organizational learning in the context of change are equally beneficial to reduce organizational change cynicism as well.

Originality/value

This study is introducing a unique model to initiate a change with the help of KM strategies, organizational learning and readiness for change.

Details

Journal of Organizational Change Management, vol. 29 no. 7
Type: Research Article
ISSN: 0953-4814

Keywords

1 – 10 of 158