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Article
Publication date: 10 December 2019

Fei Wang, Yuqiang Liu, Yahui Zhang, Yu Gao, Ling Xiao and Chengdong Wu

A robotic wheelchair system was designed to assist disabled people with disabilities to walk.

Abstract

Purpose

A robotic wheelchair system was designed to assist disabled people with disabilities to walk.

Design/methodology/approach

An anticipated sharing control strategy based on topological map is proposed in this paper, which is used to assist robotic wheelchairs to realize interactive navigation. Then, a robotic wheelchair navigation control system based on the brain-computer interface and topological map was designed and implemented.

Findings

In the field of robotic wheelchairs, the problems of poor use, narrow application range and low humanization are still not improved.

Originality/value

In the system, the topological map construction is not restricted by the environment structure, which helps to expand the scope of application; the shared control system can predict the users’ intention and replace the users’ decision to realize human-machine interactive navigation, which has higher security, robustness and comfort.

Details

Industrial Robot: the international journal of robotics research and application, vol. 47 no. 6
Type: Research Article
ISSN: 0143-991X

Keywords

Article
Publication date: 24 August 2012

Karine Bauer and Luciano Mendes

Weblabs are an additional resource in the execution of experiments in control engineering education, making learning process more flexible both in time, by allowing extra…

Abstract

Purpose

Weblabs are an additional resource in the execution of experiments in control engineering education, making learning process more flexible both in time, by allowing extra class laboratory activities, and space, bringing the learning experience to remote locations where experimentation facilities would not be available. The purpose of this paper is to investigate and report on a weblab project where the speed of a DC motor is controlled in closed loop, being the control system parameters set by the remote user (student).

Design/methodology/approach

The engine control experiments are run and on‐line transmitted by videoconference over the internet, from a didactical plant physically located at the Systems and Automation Laboratory of the Control and Automation Engineering department of the Pontifical Catholic University of Parana. The system response (transient motor speed) to the user's choice of parameters is evaluated through performance indices (IAE, ITAE), which are used to qualify the ability of the student to tune PID and RTS control algorithms. There is an option to run experiments in open loop, so the student can perform preliminary analysis to identify the system dynamic model and then apply mathematical models and computational methods, learned in theoretical classes, to define best performance control parameters. A simulation function was implemented, to further help the student in the problem solution. Virtual instrumentation resources were used to implement the Weblab, using the DC motor of a laboratory didactical plant. A local server runs a LabVIEWTM application, which can be remotely accessed in the client side through a web browser, where the system front panel is reproduced. This remote interface is directly originated at the LabVIEWTM application, through an embedded web server. At the user request, the control of the remote system is granted. The user interface is cognitive, with motor speed, control signal, set point and all the pertinent information displayed in evolving charts and indicators. Microsoft™ Skype is used to establish a videoconference with the laboratory where the plant is located. Results of the user experiments are stored in local files, which can be e‐mailed to the user at his command by the end of the session.

Findings

Used as a platform in weblab projects, LabVIEW combined with Skype provides a suitable solution for the necessary software/hardware integration for communications with data acquisition systems and advanced connectivity resources. In virtual instrumentation Skype has proved to be efficient in establishing the right environment without the need for developing complex software for teaching practical control engineering concepts.

Research limitations/implications

The level of performance (speed of acquisition, accuracy and number of parameters that could be evaluated) of the current system would need to be evaluated compared to some existing systems. The implication is the changes brought to the adopted approach to the development of, access to and the overall cost of producing virtual laboratory systems used for science, engineering and technology education.

Practical implications

With further effort, the current and similar systems could be further upgraded with user login control and server, so that results can be submitted to the tutor, thus acting as a learning evaluation instrument.

Originality/value

The originality of this research lies in the innovative integration of technology in education, which involves the implementation of a carefully designed, cost‐effective virtual laboratory for teaching and learning of concepts in control engineering.

Open Access
Article
Publication date: 24 January 2022

Yu Xiang

This paper aims to examine the recommendation system of the video-sharing website YouTube to study how control of users is effected on online platforms.

Abstract

Purpose

This paper aims to examine the recommendation system of the video-sharing website YouTube to study how control of users is effected on online platforms.

Design/methodology/approach

This paper conceptualises algorithmic systems as protocols – technological and social infrastructures that both facilitate and govern interactions between autonomous actors (Galloway and Thacker, 2004, 2007). It adopts a netnographic approach (Kozinets, 2002) to study not only the formal, technological systems of the platform but also the systems as they were made sense of, understood and enacted upon by actors. It relies both on information as revealed by the organisation itself, as well as discussions between lay users in online forums and press coverage.

Findings

The results of this study indicate that the ways in which platforms selectively facilitate interactions between users constitute a form of control. While maintaining the appearance of an open and neutral marketplace, interactions on the platform are in fact highly structured. The system relies on the surveillance of user interactions to rapidly identify and propagate marketable contents, so as to maximise user “engagement” and ad revenue. The systems place few demands or restrictions on individual users, instead control is effected in a probabilistic fashion, over the population of users as a whole, so as to, in aggregate, accomplish organisational goal.

Originality/value

This paper contributes to the literature on accounting and control practices in online spaces, by extending the notion of control beyond overt rankings and evaluations, to the underlying technical and social infrastructures that facilitate and shape interactions.

Details

Qualitative Research in Accounting & Management, vol. 19 no. 3
Type: Research Article
ISSN: 1176-6093

Keywords

Article
Publication date: 8 July 2014

Shan Liu and Lin Wang

The purpose of this paper is to examine the extent to which user liaison behavior and outcome control influence the process performance of information technology (IT…

Abstract

Purpose

The purpose of this paper is to examine the extent to which user liaison behavior and outcome control influence the process performance of information technology (IT) projects and how the IT experience, behavior observability, and outcome measurability of user liaisons affect behavior and outcome control.

Design/methodology/approach

A research model that integrates the IT experience, behavior observability, outcome measurability, behavior and outcome control, and performance from the perspective of user liaisons is developed. Quantitative data are obtained from 63 completed IT projects. Partial least squares technique is used to evaluate the measurement model. Hypotheses are tested through hierarchical regression analysis.

Findings

User liaisons with high IT experience exhibit decreased behavior control but increased outcome control. The outcome control of user liaisons is effective in the process performance of IT projects, whereas their behavior control insignificantly affects performance. However, the behavior observability and outcome measurability of user liaisons strengthen the effectiveness of behavior and outcome control. The behavior and outcome control of user liaisons also vary across different industries and project types.

Originality/value

The results of this study highlight the joint effects of the IT experience, abilities, and control decisions of user liaisons. Although the outcome control of user liaisons is an appropriate control mechanism in IT projects in consideration of the strengths of these liaisons in business knowledge and their control expenditures, the behavior control of user liaisons may also be effective in process performance if these liaisons possess high levels of behavior observability and outcome measurability.

Article
Publication date: 1 March 2013

Jeffrey D. Will, Kevin L. Moore and Ian K. Lynn

Mobile manipulators offer great capability, but their teleoperation is often an overwhelming task for humans due to the many degrees‐of‐freedom of control available from…

Abstract

Purpose

Mobile manipulators offer great capability, but their teleoperation is often an overwhelming task for humans due to the many degrees‐of‐freedom of control available from both the mobile platform and the associated manipulator. The purpose of this paper is to address the question of how these controls should be mapped to the robotic mobile platform and its manipulator for “optimal teleoperation”, for the special case of an omnidirectional mobile platform and two joint (with wrist) planar manipulator.

Design/methodology/approach

In this paper, the authors summarize the results of a study to optimize the teleoperation interface for a two‐link planar manipulator with a wrist that was mounted on an omni‐directional mobile platform.

Findings

The research comprised a carefully‐controlled study using 33 human subjects in seven different treatments of possible control interfaces.

Research limitations/implications

Users performed movement and manipulation tasks, and their performance was measured on several scales.

Practical implications

Based on this study, the authors present guidelines for optimizing mobile manipulator control interfaces and motivate future research using the method of controlled multi‐user trials.

Social implications

This research has the potential to guide the improvement of interfaces for mobile robots in military, service, and security applications.

Originality/value

The value of this research extends to optimizing remote control schemes to relieve operator fatigue and optimize interface design.

Details

Industrial Robot: An International Journal, vol. 40 no. 2
Type: Research Article
ISSN: 0143-991X

Keywords

Article
Publication date: 1 September 2004

S.H. Yang, X. Zuo and L. Yang

Internet‐based robotic systems have received much attention in recent years. A number of design issues are essential for designing this new type of robotic systems. This…

Abstract

Internet‐based robotic systems have received much attention in recent years. A number of design issues are essential for designing this new type of robotic systems. This paper addresses the Internet time delay, the user interface design and concurrent user access for an Internet‐enabled arm robot. The implementation and application of the Internet‐enabled arm robot in an open control laboratory has been illustrated as a case study.

Details

Assembly Automation, vol. 24 no. 3
Type: Research Article
ISSN: 0144-5154

Keywords

Article
Publication date: 16 November 2021

Zhou Cheng, Kai Li and Ching-I Teng

Push notification service (PNS) is an important approach to distribute personalized information to users timely and is getting more and more popular. However, users'…

Abstract

Purpose

Push notification service (PNS) is an important approach to distribute personalized information to users timely and is getting more and more popular. However, users' privacy concerns are a major inhibiting factor in their continuance usage of PNS. This study investigates the effect of privacy protection functions provided by PNS sites in enhancing users' perceived fairness on the basis of justice theory to mitigate users' concerns of information privacy. The mechanism underlying such influence on users' continuance usage of PNS comprises privacy concern and privacy-control self-efficacy.

Design/methodology/approach

Four scenario-based surveys are conducted to test the proposed hypotheses. The authors test the research model with a sample of 360 participants by ANOVA and PLS.

Findings

Results show that the proposed privacy protection functions have direct positive effects on users' privacy-control self-efficacy, negative effects on privacy concern and indirectly affect their continuance usage of PNS. Furthermore, the interaction effects between two approaches have different impacts on users' privacy concern and privacy-control self-efficacy.

Originality/value

This study provides some suggestions and guidance for PNS providers to design effective privacy protection technologies.

Details

Aslib Journal of Information Management, vol. 74 no. 2
Type: Research Article
ISSN: 2050-3806

Keywords

Article
Publication date: 1 April 1992

Chun Wei Choo and Andrew Clement

Defines end user computing (EUC). Suggests a dichotomy betweeninformation systems (IS) managers and end users, both of whom wishcontrol computing resources. Reviews…

Abstract

Defines end user computing (EUC). Suggests a dichotomy between information systems (IS) managers and end users, both of whom wish control computing resources. Reviews literature concerning EUC and the stage growth model. Suggests alternative visions of the role of IS and user managements in the growth of EUC.

Details

Information Technology & People, vol. 6 no. 4
Type: Research Article
ISSN: 0959-3845

Keywords

Article
Publication date: 20 June 2016

Sarath Tomy and Eric Pardede

The purpose of this paper is to analyse the problem of privacy disclosure of third party applications in online social networks (OSNs) through Facebook, investigate the…

2153

Abstract

Purpose

The purpose of this paper is to analyse the problem of privacy disclosure of third party applications in online social networks (OSNs) through Facebook, investigate the limitations in the existing models to protect users privacy and propose a permission-based access control (PBAC) model, which gives users complete control over users’ data when accessing third party applications.

Design/methodology/approach

A practical model based on the defined permission policies is proposed to manage users information accessed by third party applications and improve user awareness in sharing sensitive information with them. This model is a combination of interfaces and internal mechanisms which can be adopted by any OSN having similar architecture to Facebook in managing third party applications, without much structural changes. The model implemented in Web interface connects with Facebook application programming interface and evaluates its efficacy using test cases.

Findings

The results show that the PBAC model can facilitate user awareness about privacy risks of data passed on to third party applications and allow users who are more concerned about their privacy from releasing such information to those applications.

Research limitations/implications

The study provides further research in protecting users’ privacy in OSNs and thus avoid the risks associated with that, thereby increasing users’ trust in using OSNs.

Originality/value

The research has proven to be useful in improving user awareness on the risk associated with sharing private information on OSNs, and the practically implemented PBAC model guarantees full user privacy from unwanted disclosure of personal information to third party applications.

Article
Publication date: 1 October 2002

Clare Evans

Service users in Wiltshire have had the opportunity of demonstrating how they could undertake a usercontrolled Best Value review including showing the variety of ways…

Abstract

Service users in Wiltshire have had the opportunity of demonstrating how they could undertake a usercontrolled Best Value review including showing the variety of ways they chose to evaluate the service ‐ in this case Direct Payments. Using the Best Value framework of the four Cs, they compared support services and costings with those in other local authority areas, designed consultation surveys and challenged care managers about their knowledge of the service. Learning from the project has implications for all those involved in social care Best Value reviews and the participation of users.

Details

Journal of Integrated Care, vol. 10 no. 5
Type: Research Article
ISSN: 1476-9018

Keywords

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