bluuebunny/crossref_metadata_2025_split huggingface dataset:
Inter‐turn short‐circuit effect on induction machine iron losses
Authors: Jelassi S. , Romary R. , Brudny J.F. 
Published: July 2010

PurposeThe aim of this paper is to estimate the iron losses for an induction machine in the healthy case taking the slotting effect into account and to study the effect of an inter‐turn short‐circuit on these losses. Theoretical results are then compared with experimental ones.Design/methodology/approachA simple analytical model of iron losses allows one to calculate and to appreciate the contribution of the slotting effect on induction machine iron losses without and with an inter‐turn stator short‐circuit. This semi‐analytical approach is based on the iron stator and rotor flux density repartition which is deduced from the air‐gap flux density.FindingsThe iron losses are not only due to the fundamental air‐gap flux density, but also to the slotting harmonics. In fact, the slotting effect generates harmonic flux density waves with very low magnitudes but with high‐angular velocities, leading to non‐negligible harmonic iron dynamic losses which have similar values on both the stator and the rotor. The inter‐turn short‐circuit generates an iron losses and a slotting harmonic contribution increase.Research limitations/implicationsExperimental measurements give the total iron losses. They do not allow separating the fundamental and the slotting harmonics contribution.Practical implicationsThe knowledge of the iron losses behaviour in the healthy machine taking into account the slotting effect is important to optimize the design. The fault contribution on these losses allows one to estimate the damage which can be engendered by the fault.Originality/valueGenerally, iron losses studies and calculations are performed numerically using finite element software. The analytical approach can be interesting because it allows one to make faster calculations and to analyze the influence of the machine geometric parameters.
Permanent magnet (de‐) magnetization and soft iron hysteresis effects
Authors: Michaelides A.M. , Simkin J. , Kirby P. , Riley C.P. 
Published: July 2010

PurposeThe purpose of this paper is to promote practical methods for the numerical modelling of hard magnetic materials and soft ferromagnetic materials in an engineering context (design of electrical machines).Design/methodology/approachObjectives achieved by the use of a practical, semi‐empirical material model that needs modest material data and computer resources. Methods: a focused theoretical specification and algorithm development; use of actual material data for algorithm validation; incorporation in commercial engineering software as a test harness. Approach: a practical engineering scheme using a macroscopic material model based on readily available materials data. Scope: numerical model of hard magnetic and soft ferromagnetic materials; scalar and vector hysteresis, major and minor loops.FindingsThe limited practicality of much of the literature, especially vector hysteresis; successful use of the model in an existing non‐linear numerical solver; energy conservation gives confidence in the results; the electric motor provides a good validation test case.Research limitations/implicationsPossible future research: application to more complicated material properties such as magneto‐relaxation.Practical implicationsThe paper extends the scope of computer‐aided engineering design of electrical machines. The impact on the developer: increased sale of an engineering software product. The impact on the design engineer: more efficient designs, reduced prototyping, reduced technical risk.Originality/valueThe algorithm that provides an effective material model; the focus on the practical issues of data and computational resources; the implementation of a theoretical construct in a large‐scale engineering design program. The value is to designers of electrical machines.
Effects of carrier frequency of PWM inverter on electrical loss of interior permanent magnet motor
Authors: Kawase Yoshihiro , Yamaguchi Tadashi , Umemura Tomohiro , Shibayama Yoshiyasu , Hanaoka Koji , Makishima Shingo , Kishida Kazuya 
Published: July 2010

PurposeThe purpose of this paper is to clarify the electrical loss of an interior permanent magnet (IPM) motor driven by the pulse‐width modulation (PWM) inverter with various carrier frequencies quantitatively.Design/methodology/approachAn IPM motor driven by the PWM inverter was simulated using the three‐dimensional finite‐element method while changing various carrier frequencies of the PWM inverter. The calculated results are compared with the calculated results differing the number of permanent magnet division.FindingsThe eddy current loss in the permanent magnets decreases as the carrier frequency increases. In the case of low‐carrier frequency, the eddy current loss greatly decreases as the number of permanent magnet division increases. However, the effect of the eddy current loss decreases by the number of permanent magnet division as the carrier frequency increases.Originality/valueThe paper describes the electrical loss of an IPM motor driven by the PWM inverter with various carrier frequencies.
Automated radial vibrations reduction for switched reluctance machines
Authors: Lecointe J.‐Ph. , Pusca R. , Cassoret B. , Brudny J.‐F. 
Published: July 2010

PurposeThe purpose of this paper is to suggest a procedure which makes it possible to reduce the radial vibrations of doubly salient switched reluctance motors (SRMs).Design/methodology/approachAn analytical method for the SRM radial vibration determination is first described. It is then extended to the active vibration reduction. An auxiliary winding equips the stator. The paper explains how the corresponding currents have to be adjusted to achieve a simple and robust control, with a special emphasis about the compatibility of the main and auxiliary supplies and about the reduction control principle. At last, an example of drastic noise reduction is presented.FindingsThe proposed method makes possible to define the theoretical vibration spectrum of SRM and thus it gives the major components to be reduced. The feasibility of automating the principle of active reduction is shown. The process of active reduction shows that a vibration component can be diminished by over 90 percent.Research limitations/implicationsThe active reduction is applied for reducing one component of the vibration spectrum. Future developments will focus on the simultaneous reduction of several components of vibration spectrum.Originality/valueThe method offers an automated process to reduce considerably the component of highest amplitude in the vibration spectrum.
How healthy is the annual health check?
Authors: Cole Jennifer , Radnor Zoe 
Published: July 2010

PurposeThis paper aims to provide an assessment of organisational implementation of the healthcare standards focusing on the annual health check (AHC) in the UK NHS.Design/methodology/approachUsing a postal questionnaire a national survey of all acute and specialist NHS Trusts in England was undertaken. The survey yielded a total of 102 responses, which equates to a 59 per cent response rate.FindingsThe findings suggest considerable variation and diversity in the rate of progress individual Trusts made towards implementing the AHC in its first year. However, across many of the organisations surveyed, there was good evidence of some progress towards ensuring that basic operational and strategic components of the framework were in place.Research limitations/implicationsThe research appears to reflect the findings of earlier work on the implementation of clinical governance, suggesting that few lessons have been learnt from previous policy initiatives and raising important questions for the future of health care standards.Practical implicationsThe findings could be used to support future national health care initiatives by giving an insight into how organisations respond to and manage the process of standards.Originality/valueThis study makes a number of recommendations to facilitate smooth implementation of standards in health care. These include the introduction of a national IT solution; development of regional/national networks; more timely, relevant and consistent national guidance and, the definition of minimum information requirements needed for organisational assurance.
Do we need bigger buckets or better search engines?
Authors: Serewicz Lawrence W. 
Published: July 2010

PurposeThe purpose of this paper is to explore the challenges created by unlimited storage in space and time.Design/methodology/approachThe paper looks at the issue from a practioner's viewpoint and considers it from the philosophical perspective regarding unlimited storage.FindingsUnlimited storage in terms of space and time can present philosophical and technological problems. The rise of the semantic web search engines will help transform this process, but for most organisations it will be a managerial issue rather than a technological issue.Research limitations/implicationsMore work needs to be done into how semantic web will influence records management.Practical implicationsSemantic web is in its infancy, but it has far reaching consequences for records management because it can transform the process.Social implicationsThe philosophical issues affect how to understand memory and what the collective memory of a society, as seen through archives, is understood and challenged by unlimited storage in space and time.Originality/valueLooks at the issue from a philosophical perspective and pushes, the boundaries of the field by looking at the implications of the new developments.
The records‐risk nexus: exploring the relationship between records and risk
Authors: Lemieux Victoria L. 
Published: July 2010

PurposeThis paper seeks to explore the nexus between records and risks. It briefly traces different conceptualizations and the historical evolution of risk and risk management and analyzes discourse on risk and the use of risk management in the field of records management and allied disciplines such as archives and information science.Design/methodology/approachThe methodological approach involves searching for and extracting for analysis references to “risk” in articles from well‐known journals and subjecting the 248 references to a visual analysis.FindingsThe visual analysis reveals 15 distinct, and in some cases conceptually related topics or categories of articles on risk. These are analysed further to create a typology of seven distinct topics of discourse defining the records‐risk nexus in the sampled literature.Originality/valueThis paper contributes an analysis of the literature on records and risk that defines the nexus between the two subjects, presents a typology of discourse on the records‐risk nexus, and demonstrates the use of an innovative methodology (visual analysis) for analysis of large sets of bibliographic data.
The equity and efficiency of the Australian share market with respect to director trading
Authors: Uylangco Katherine , Easton Steve , Faff Robert 
Published: July 2010

PurposeThe purpose of this paper is to investigate the extent of directors breaching the reporting requirements of the Australian Stock Exchange (ASX) and the Corporations Act in Australia. Further, it seeks to assess whether directors in Australia achieve abnormal returns from trades in their own companies.Design/methodology/approachUsing an event study approach on an Australian sample, abnormal returns for a range of situations were estimated.FindingsA total of 13 (seven) per cent of own‐company directors trades do not meet the ASX (Corporations Act) requirement of reporting within five (14) business days. Directors do achieve abnormal returns through trading in shares of their own companies. Ignoring transaction costs, outsiders can achieve abnormal returns by imitating directors' trades. Analysis of returns to directors after they trade but before they announce the trade to the market shows that directors are making small but statistically significant returns that are not available to the market. Analysis of returns to directors subsequent to the ASX reporting requirement up to the day the trade is reported shows that directors are making small but statistically significant returns that should be available to the market.Research limitations/implicationsFuture research should investigate the linkages between late reporting by directors and disadvantages to outside shareholders and the implementation of internal policies implemented to mitigate insider trading.Practical implicationsMarket participants should remain vigilant regarding the potential for late/non‐reporting of directors' trades.Originality/valueUncovering breaches of reporting regulations are particularly important given that directors tend to purchase (sell) shares when the price is low (high), thereby achieving abnormal returns.
Redesign and cost estimation of rapid manufactured plastic parts
Authors: Atzeni Eleonora , Iuliano Luca , Minetola Paolo , Salmi Alessandro 
Published: July 2010

PurposeThe purpose of this paper is to highlight how rapid manufacturing (RM) of plastic parts combined with part redesign could have positive repercussion on cost saving.Design/methodology/approachComparison between two different technologies for plastic part production, the traditional injection molding (IM) and the emergent RM, is done with consideration of both the geometric possibilities of RM and the economic aspect. From an extended literature review, the redesign guidelines and the cost model are identified and then applied to a component selected for its shape complexity. It is an assembly that was redesigned for RM purpose, in order to take advantage of additive manufacturing potentialities. The geometric and economic differences between IM and RM are discussed.FindingsThis research evidences that currently in Western Europe RM combined with redesign can be economically convenient and competitive to IM for medium volume production of plastic parts. Consequently, this is a great opportunity to keep the production in Europe instead of moving it overseas.Research limitations/implicationsAs regards manufacturing costs, results presented in this study are mainly based on cost estimation provided by Italian companies and it is assumed that the plant is located in Western Europe.Practical implicationsThe research assesses the feasibility of making functional and operational plastic parts without the use of traditional manufacturing processes by redesign for RM.Originality/valueTwo different kinds of research papers comparing RM and IM exist in literature: on the one hand, the two techniques are evaluated from the economical point of view, on the other, the part redesign is analyzed. No paper considers the interrelation between redesign and cost estimation. In this work, these aspects are combined to point out that a remarkable cost reduction is obtained when the component shape is modified to exploit RM advantages.
Development of a regenerative pump impeller using rapid manufacturing techniques
Authors: Quail Francis J. , Scanlon Thomas , Strickland Matthew 
Published: July 2010

PurposeThe purpose of this paper is to present a method of rapid prototyping (RP) used in the development of a regenerative pump impeller. RP technology was used to create complex impeller blade profiles for testing as part of a regenerative pump optimisation process. Regenerative pumps are the subject of increased interest in industry.Design/methodology/approachTen modified impeller blade profiles, relative to the standard radial configuration, were evaluated with the use of computational fluid dynamics (CFD) and experimental testing. Prototype impellers were needed for experimental validation of the CFD results. The manufacture of the complex blade profiles using conventional milling techniques is a considerable challenge for skilled machinists.FindingsThe complexity of the modified blade profiles would normally necessitate the use of expensive computer numerically controlled machining with five‐axis capability. With an impeller less than 75 mm in diameter with a maximum blade thickness of 1.3 mm, a rapid manufacturing technique enabled production of complex blade profiles that are dimensionally accurate and structurally robust enough for testing.Research limitations/implicationsAs more advanced RP machines become available in the study in the coming months, e.g. selective laser sintering, the strength of the parts particularly for higher speed testing will improve and the amount of post processing operations will reduce.Practical implicationsThis technique offers the possibility to produce components of increased complexity whilst ensuring quality, strength, performance and speed of manufacture.Originality/valueThe ability to manufacture complex blade profiles that are robust enough for testing, in a rapid and cost effective manner is proving essential in the overall design optimisation process for the regenerative pump.
A method for performance evaluation of RE/RP systems in dentistry
Authors: Germani Michele , Raffaeli Roberto , Mazzoli Alida 
Published: July 2010

PurposeThe purpose of this paper is to investigate a method for comparing the scanning and reproducing accuracy of highly shaped objects like plaster casts used in dentistry.Design/methodology/approachTheoretical considerations on errors introduced by the scanning systems and subsequent point clouds data elaboration have led to a method to estimate the accuracy of the whole process. Suitable indices have been chosen and computed at each stage. As a final result, the overall chain, scanning and reproducing systems can be assessed. In order to validate the proposed method casts have been scanned by means of commercial systems and then reproduced by using different rapid prototyping technologies, materials and parameters. Error indices have been computed and reported.FindingsSince it is not possible to define reliable and meaningful reference models for non‐standard shapes, an absolute accuracy value for the scanning process cannot be stated. Anyway the proposed method, thanks to relative performance indices, allows the comparison of different acquisition systems and the evaluation of the most performing manufacturing chain.Practical implicationsThe study provides a method to assess the relative performance between commercial systems both in scanning and reproducing stage.Originality/valueIn literature, some studies on the accuracy of scanning devices have been found but they are based on standard geometrical features. In this paper, the problem of complex shapes in absence of reference model is addressed instead.
Fit and shopping preferences by clothing benefits sought
Authors: Kinley Tammy R. 
Published: July 2010

PurposeThe purpose of this study is to determine whether clothing benefits sought (CBS) affected fit preferences, satisfaction with the fit of ready‐to‐wear, label style preferences, and shopping behaviors of US women.Design/methodology/approachWritten questionnaires were completed to determine the relationship between the CBS paradigm and the fit and shopping variables examined in the study. A larger study from which these findings are drawn involved behaviors related specifically to pants.FindingsResponses on questionnaires from 150 women indicated four CBS factors: Fashion Forward, Sexy, Reputation, and Individualist. Study participants who desired Fashion Forward benefits preferred to shop in specialty stores and a tighter fit. Participants who sought Sexy benefits spent the most money on average, for a new pair of pants, preferred a tighter fit, clothing sized by waist dimension, and shopping in specialty stores. Participants who desired Reputation benefits from clothing shopped in specialty stores. Respondents who sought the Individualist benefits were more likely to shop via catalog/internet.Research limitations/implicationsData were obtained from a convenience sample of women in a metropolitan area of the USA, thus generalization of results is limited.Practical implicationsIn an overstored, highly competitive retail environment, the CBS paradigm will be useful in targeting product and product delivery. The findings indicate, however, that women who seek different benefits from their clothing do shop differently.Originality/valueResults of the study will help one to better define markets according to an intuitively useful psychographic variable for which there has been limited research.
Scenarios for Sudan in 2012: crash or happy take‐off?
Authors: van der Lijn Jaïr 
Published: July 2010

PurposeThe purpose of this paper is to portray four scenarios for the future of Sudan in the year 2012. On the basis of these scenarios it aims to draw a number of conclusions on the future of Sudan and the way ahead.Design/methodology/approachThe paper uses the Shell methodology for scenario building and is based on five scenario workshops held in Sudan, one in The Netherlands, interviews and literature research. The four scenarios not only intend to provide an overview of what is likely to happen, but also aim to be plausible, challenging and creative.FindingsThe paper finds that the future of Sudan is likely to remain violent and that the most optimistic scenario is also the least likely. It concludes that, although outside mediation and assistance in the organization of elections are needed, the critical difference between a successful and an unsuccessful outcome will to a large extent be determined by whether the South has a stable, cooperative and confident leadership.Practical implicationsThe paper provides a number of policy recommendations for the international community to prevent the worst from happening and to be prepared for what may come.Originality/valueThe paper aims to fill the gap in future foresight with regard to Sudan and for this purpose utilized the knowledge among the Sudanese themselves.
Role management in a privacy‐enhanced collaborative environment
Authors: Lorenz Anja , Borcea‐Pfitzmann Katrin 
Published: July 2010

PurposeFacing the dilemma between collaboration and privacy is a continual challenge for users. In this setting, the purpose of this paper is to discuss issues of a highly flexible role management integrated in a privacy‐enhanced collaborative environment (PECE).Design/methodology/approachThe general framework was provided by former findings of several research projects, i.e. collaborative platform BluES and projects of privacy and identity management PRIME and PrimeLife. The role management concept bases on a literature survey and has been proofed by integration into the privacy‐enhanced environment BluES'n.FindingsA three‐dimensional role management concept was developed describing users' rights, tasks, and positions. A discussion on how to fulfill privacy requirements yielded that a semi‐automated decision making regarding the use of roles with different identities is reasonable to support users' control of their privacy when interacting with others.Research limitations/implicationsThe concept of flexible role management complies with the requirements of PECEs. However, a fully automated approach of rule‐based information disclosure is not possible as such decisions depend on personal and situational aspects.Practical implicationsUsing the example of a flexible role management concept, research described in this paper demonstrates that privacy and interaction concerns can be balanced and should be considered in application design processes.Social implicationsConcepts of PECEs allow respecting privacy‐related attitudes and could improve the quality of service consumption.Originality/valueThe paper demonstrates contrasts between collaboration and privacy attitudes and presents solutions for the integration of role management to overcome this initially supposed contradiction.