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Article
Publication date: 16 November 2010

Peter Scholz, Wolfgang Ackermann and Thomas Weiland

The purpose of this paper is to offer a fast and accurate simulation method for printed spiral radio frequency identification coils and to extract the parameters of an…

Abstract

Purpose

The purpose of this paper is to offer a fast and accurate simulation method for printed spiral radio frequency identification coils and to extract the parameters of an equivalent resonance circuit.

Design/methodology/approach

The frequency‐dependent port impedance of a rectangular spiral multi‐turn antenna is simulated with the non‐retarded partial element equivalent circuit (PEEC) method. The discretization settings needed for an accurate modeling of skin and proximity effects at medium frequencies as well as parasitic capacitances are discussed. Two different PEEC approaches are used, a magneto‐quasi‐static (resistive and inductive cells) model and a non‐retarded (capacitive cells included) model in order to extract a reduced equivalent resonance circuit which is beneficial to describe the inductive coupling to further inductors via the transformer concept.

Findings

With optimized mesh settings, the extremely fast simulation can be carried out just in seconds whereas the results compared to a computationally much more expensive CST Microwave Studio® reference solution as well as an analytical direct current solution show errors of only about a few percent.

Research limitations/implications

The methodology is limited to frequencies up to the first self‐resonant frequency of the coil. In addition, piecewise‐homogeneous materials are implied.

Originality/value

Specialized mesh settings allow for a very fast and accurate simulation of rectangular spiral inductors. A method for the parameter extraction of a resonance circuit is proposed by evaluating two different PEEC models.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 29 no. 6
Type: Research Article
ISSN: 0332-1649

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Book part
Publication date: 30 September 2019

Abstract

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Generations Z in Europe
Type: Book
ISBN: 978-1-78973-491-1

Abstract

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Protest Technologies and Media Revolutions
Type: Book
ISBN: 978-1-83982-647-4

Abstract

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

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Article
Publication date: 1 February 2009

Tobias Buchner

This article starts with a brief overview of the history of housing for people with intellectual disability in Austria. The system of care and Austrian disability policy…

Abstract

This article starts with a brief overview of the history of housing for people with intellectual disability in Austria. The system of care and Austrian disability policy are also examined, focusing on implementation of deinstitutionalisation and community living. The following analysis of services provided in the field of housing for people with intellectual disabilities shows that support is provided in undistinguished, generalised service packages based on a competency model. Academic research on community living is quite rare in Austria, and fails to take into account the subjective perspective of people with intellectual disabilities.

Details

Tizard Learning Disability Review, vol. 14 no. 1
Type: Research Article
ISSN: 1359-5474

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Article
Publication date: 1 January 2006

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26

Abstract

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Microelectronics International, vol. 23 no. 1
Type: Research Article
ISSN: 1356-5362

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Book part
Publication date: 3 December 2018

Cristiano Codagnone, Athina Karatzogianni and Jacob Matthews

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

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Book part
Publication date: 7 August 2019

Roser Pujadas and Daniel Curto-Millet

While digital platforms tend to be unproblematically presented as the infrastructure of the sharing economy – as matchmakers of supply and demand – the authors argue that…

Abstract

While digital platforms tend to be unproblematically presented as the infrastructure of the sharing economy – as matchmakers of supply and demand – the authors argue that constituting the boundaries of infrastructures is political and performative, that is, it is implicated in ontological politics, with consequences for the distribution of responsibilities (Latour, 2003; Mol, 1999, 2013; Woolgar & Lezaun, 2013). Drawing on an empirical case study of Uber, including an analysis of court cases, the authors investigate the material-discursive production of digital platforms and their participation in the reconfiguring of the world (Barad, 2007), and examine how the (in)visibility of the digital infrastructure is mobilized (Larkin, 2013) to this effect. The authors argue that the representation of Uber as a “digital platform,” as “just the technological infrastructure” connecting car drivers with clients, is a political act that attempts to redefine social responsibilities, while obscuring important dimensions of the algorithmic infrastructure that regulates this socioeconomic practice. The authors also show how some of these (in)visibilities become exposed in court, and some of the boundaries reshaped, with implications for the constitution of objects, subjects and their responsibilities. Thus, while thinking infrastructures do play a role in regulating and shaping practice through algorithms, it could be otherwise. Thinking infrastructures relationally decentre digital platforms and encourage us to study them as part of ongoing and contested entanglements in practice.

Details

Thinking Infrastructures
Type: Book
ISBN: 978-1-78769-558-0

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Expert briefing
Publication date: 21 August 2019

The economy shrank by 0.1% quarter-on-quarter in April-June; further shrinking in the third quarter would mean a technical recession. Since growth is not likely to pick up…

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Article
Publication date: 15 February 2011

Patricia Wolf, Ralf Hansmann and Peter Troxler

The purpose of this paper is to review and discuss the potential of available event formats for facilitating the initiation of organizational change processes. It presents…

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1266

Abstract

Purpose

The purpose of this paper is to review and discuss the potential of available event formats for facilitating the initiation of organizational change processes. It presents unconferencing, a relatively new event format, which seems to provide unique opportunities for this purpose. It reports and analyzes the case of a large Swiss university which initiated its pro‐sustainability transformation by organizing an unconference.

Design/methodology/approach

Researchers studied the effects of unconferencing and the mechanisms, which brought them about in a case study. In the empirical setting of a large Swiss university, a qualitative study triangulating participatory observation, narrative and problem‐centered interviews, participant survey and documentary analysis was carried out. Data were collected and analyzed at different points in time.

Findings

Empirical findings suggest that unconferencing is an appropriate event format for facilitating the initiation of the pro‐sustainability organizational change process of a university. In our case, unconferencing achieved systems connectivity, enabled mutual learning and generated excellent outputs in form of project proposals.

Social implications

The paper raises the awareness of other universities and organizations of an event format they might wish to apply in their organizational change processes.

Originality/value

So far, research has not provided satisfactory answers to the question, how to best initiate organizational change. This paper provides a systematic investigation of available methodological approaches. It furthermore explains unconferencing, which is increasingly applied by practitioners but so far has stimulated only little discourse in the scientific community.

Details

Journal of Organizational Change Management, vol. 24 no. 1
Type: Research Article
ISSN: 0953-4814

Keywords

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