Search results

1 – 10 of 136
Article
Publication date: 9 August 2019

Gopu Venugopal, V. Gopalakrishnan and S.P. Rajkumar

Induction motors (IMs) are considered one of the most important elements of the industrial process. However, in this environment, these machines are subject to electrical and…

Abstract

Purpose

Induction motors (IMs) are considered one of the most important elements of the industrial process. However, in this environment, these machines are subject to electrical and mechanical faults, which may cause significant financial losses. Thus, the purpose of this paper is to propose an optimal identification of inter-turn insulation faults present in the random wound IM.

Design/methodology/approach

The design approach deals with a simple technique, using the effect of the inter-turn fault in modifying the high-frequency components of the applied pulse-width-modulated voltage.

Findings

The change in insulation strength between the turns affects the capacitive component of the stator line current. Resulting changes in wave shapes of the applied voltage have been studied with respect to both the distance of inter-turn faults from line end and reduction in the insulation strength, and hence in the insulation resistance value.

Originality/value

Studies have been conducted by using computer simulation and validated by experiments. There is ample evidence that an impending and progressing inter-turn fault can be identified in adjustable speed drives driven by frequency converters by studying line-end coil-voltage waveforms.

Details

Engineering Computations, vol. 37 no. 2
Type: Research Article
ISSN: 0264-4401

Keywords

Article
Publication date: 1 February 1989

Bennett J. Price

Uninterruptible Power Supply (UPS) systems are typically designed to provide power to computers for five to thirty minutes after all utility company power has failed. In addition…

Abstract

Uninterruptible Power Supply (UPS) systems are typically designed to provide power to computers for five to thirty minutes after all utility company power has failed. In addition to providing blackout and brownout protection, many UPS systems also protect against spikes, surges, sags, and noise, and some also offer many of the features found in power distribution units (PDUs). The major components or subsystems of a typical UPS system are detailed, and a sample bid specification is appended. Three sidebars discuss UPSs and air conditioning, the maintenance bypass switch (MBS), and literature for further reading.

Details

Library Hi Tech, vol. 7 no. 2
Type: Research Article
ISSN: 0737-8831

Abstract

Details

Harnessing the Power of Failure: Using Storytelling and Systems Engineering to Enhance Organizational Learning
Type: Book
ISBN: 978-1-78754-199-3

Article
Publication date: 1 March 1993

LAUNCHED at the Farnborough International Airshow last year by FT Technologies Ltd. the FT280 Synchro/Resolver Test Set incorporates in one versatile instrument an Angle Position…

Abstract

LAUNCHED at the Farnborough International Airshow last year by FT Technologies Ltd. the FT280 Synchro/Resolver Test Set incorporates in one versatile instrument an Angle Position Indicators, Simulator and Reference Oscillator and is designed for testing and evaluating a wide range of synchro and resolver‐based avionics equipment.

Details

Aircraft Engineering and Aerospace Technology, vol. 65 no. 3
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 8 August 2016

Anas N. Al-Rabadi

The purpose of this paper is to introduce new implementations for parallel processing applications using bijective systolic networks and the corresponding carbon-based field…

Abstract

Purpose

The purpose of this paper is to introduce new implementations for parallel processing applications using bijective systolic networks and the corresponding carbon-based field emission controlled switching. The developed implementations are performed in the reversible domain to perform the required bijective parallel computing, where the implementations for parallel computations that utilize the presented field-emission controlled switching and their corresponding m-ary (many-valued) extensions for the use in nano systolic networks are introduced. The first part of the paper presents important fundamentals with regards to systolic computing and carbon-based field emission that will be utilized in the implementations within the second part of the paper.

Design/methodology/approach

The introduced systolic systems utilize recent findings in field emission and nano applications to implement the functionality of the basic bijective systolic network. This includes many-valued systolic computing via field emission techniques using carbon-based nanotubes and nanotips. The realization of bijective logic circuits in current and emerging technologies can be very important for various reasons. The reduction of power consumption is a major requirement for the circuit design in future technologies, and thus, the new nano systolic circuits can play an important role in the design of circuits that consume minimal power for future applications such as in low-power signal processing. In addition, the implemented bijective systems can be utilized to implement massive parallel processing and thus obtaining very high processing performance, where the implementation will also utilize the significant size reduction within the nano domain. The extensions of implementations to field emission-based many-valued systolic networks using the introduced bijective nano systolic architectures are also presented.

Findings

Novel bijective systolic architectures using nano-based field emission implementations are introduced in this paper, and the implementation using the general scheme of many-valued computing is presented. The carbon-based field emission implementation of nano systolic networks is also introduced. This is accomplished using the introduced field emission carbon-based devices, where field emission from carbon nanotubes and nano-apex carbon fibers is utilized. The implementations of the many-valued bijective systolic networks utilizing the introduced nano-based architectures are also presented.

Originality/value

The introduced bijective systolic implementations form new important directions in the systolic realizations using the newly emerging nano-based technologies. The 2-to-1 multiplexer is a basic building block in “switch logic,” where in switch logic, a logic circuit is realized as a combination of switches rather than a combination of logic gates as in the gate logic, which proves to be less costly in synthesizing multiplexer-based wide variety of modern circuits and systems since nano implementations exist in very compact space where carbon-based devices switch reliably using much less power than silicon-based devices. The introduced implementations for nano systolic computation are new and interesting for the design in future nanotechnologies that require optimal design specifications of minimum power consumption and minimum size layout such as in low-power control of autonomous robots and in the adiabatic low-power very-large-scale-integration circuit design for signal processing applications.

Details

International Journal of Intelligent Computing and Cybernetics, vol. 9 no. 3
Type: Research Article
ISSN: 1756-378X

Keywords

Book part
Publication date: 11 October 2023

Javier Peña Capobianco

The objective of this chapter is to identify the key characteristics of Global Services businesses that will thrive and achieve success in the future. These factors are integrated…

Abstract

The objective of this chapter is to identify the key characteristics of Global Services businesses that will thrive and achieve success in the future. These factors are integrated into three main pillars, which we refer to as the Triple-Win. The first and most obvious pillar is technology as a tool. The second pillar is the design and sustainability of the business model, without which the previous factor would be merely a cost and not an investment. And last but not the least, there is the purpose which gives meaning to the proposal, focusing on the human being and their environment. The DIDPAGA business model sits at the intersection of these three elements.

Details

The New Era of Global Services: A Framework for Successful Enterprises in Business Services and IT
Type: Book
ISBN: 978-1-83753-627-6

Keywords

Article
Publication date: 1 April 1988

Chris Sugnet, Henriette D. Avram, Rowland Brown, Clifford A. Lynch, Susan K. Martin, Ron Miller, C. James Schmidt, Sharon Walbridge, Louella V. Wetherbee and Bruce Ziegman

When the initial library networks were established in the United States, they provided affordable, online automation services that were available from virtually no other source…

Abstract

When the initial library networks were established in the United States, they provided affordable, online automation services that were available from virtually no other source. The surge of automation experienced by American libraries for the past two decades has altered the historical relationships that characterize library cooperation. Local networks are being created and machine‐readable products previously available only from the networks are now being packaged on optical media and distributed to individual institutions. With these technological advances, the need for, services offered by, and financial viability of the networks have begun to undergo dramatic change. This is also a time of great opportunity for libraries and networks. There is on the horizon what may be the infrastructure for a national information network. The realization of this network will require close cooperation of librarians, who have embraced the Open Systems Interconnection (OSI) Reference Model for networking, and members of the academic and research community, which is still relying heavily on the Transmission Control Protocol/Internet Protocols (TCP/IP) for communications purposes.

Details

Library Hi Tech, vol. 6 no. 4
Type: Research Article
ISSN: 0737-8831

Article
Publication date: 1 March 1972

IT IS a great pity that Training for the Future, the consultative document issued by the Department of Employment on the first of last month, should have been overtaken by other…

Abstract

IT IS a great pity that Training for the Future, the consultative document issued by the Department of Employment on the first of last month, should have been overtaken by other urgent matters that have attracted wider public interest. This has foreshortened the time for general debate before sending comments to the Department by the end of May.

Details

Work Study, vol. 21 no. 3
Type: Research Article
ISSN: 0043-8022

Abstract

Details

Platform Economics: Rhetoric and Reality in the ‘Sharing Economy’
Type: Book
ISBN: 978-1-78743-809-5

Article
Publication date: 19 September 2008

Gianfranco Walsh, Heiner Evanschitzky and Maren Wunderlich

Research on the relationship between customer satisfaction and customer loyalty has advanced to a stage that requires a more thorough examination of moderator variables. Limited…

17059

Abstract

Purpose

Research on the relationship between customer satisfaction and customer loyalty has advanced to a stage that requires a more thorough examination of moderator variables. Limited research shows how moderators influence the relationship between customer satisfaction and customer loyalty in a service context; this article aims to present empirical evidence of the conditions in which the satisfaction‐loyalty relationship becomes stronger or weaker.

Design/methodology/approach

Using a sample of more than 700 customers of DIY retailers and multi‐group structural equation modelling, the authors examine moderating effects of several firm‐related variables, variables that result from firm/employee‐customer interactions and individual‐level variables (i.e. loyalty cards, critical incidents, customer age, gender, income, expertise).

Findings

The empirical results suggest that not all of the moderators considered influence the satisfaction‐loyalty link. Specifically, critical incidents and income are important moderators of the relationship between customer satisfaction and customer loyalty.

Practical implications

Several of the moderator variables considered in this study are manageable variables.

Originality/value

This study should prove valuable to academic researchers as well as service and retailing managers. It systematically analyses the moderating effect of firm‐related and individual‐level variables on the relationship between customer satisfaction and loyalty. It shows the differential effect of different types of moderator variables on the satisfaction‐loyalty link.

Details

European Journal of Marketing, vol. 42 no. 9/10
Type: Research Article
ISSN: 0309-0566

Keywords

1 – 10 of 136