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Article
Publication date: 1 July 2014

Orazio Muscato, Wolfgang Wagner and Vincenza Di Stefano

– The purpose of this paper is to deal with the self-heating of semiconductor nano-devices.

Abstract

Purpose

The purpose of this paper is to deal with the self-heating of semiconductor nano-devices.

Design/methodology/approach

Transport in silicon semiconductor devices can be described using the Drift-Diffusion model, and Direct Simulation Monte Carlo (MC) of the Boltzmann Transport Equation.

Findings

A new estimator of the heat generation rate to be used in MC simulations has been found.

Originality/value

The new estimator for the heat generation rate has better approximation properties due to reduced statistical fluctuations.

Details

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, vol. 33 no. 4
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 1 December 2005

Orazio Muscato and Wolfgang Wagner

To provide an accurate analysis of the systematic error introduced by the constant time technique free flight mechanism, due to the choice of the time step and number particles.

Abstract

Purpose

To provide an accurate analysis of the systematic error introduced by the constant time technique free flight mechanism, due to the choice of the time step and number particles.

Design/methodology/approach

A homogeneous (bulk) silicon semiconductor is studied by using direct simulation Monte Carlo (DSMC).

Findings

The systematic error turns out to be of the first order with respect to the time step. The efficiency of the method is tackled.

Research limitations/implications

The analysis is limited to the bulk case. Future researches will consider non homogeneous devices

Originality/value

An accurate analysis of an “old” free flight mechanism has been performed, and its limits have been stated.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 24 no. 4
Type: Research Article
ISSN: 0332-1649

Keywords

Content available
Article
Publication date: 1 December 2003

73

Abstract

Details

Microelectronics International, vol. 20 no. 3
Type: Research Article
ISSN: 1356-5362

Keywords

Open Access
Article
Publication date: 19 May 2023

Wolfgang J. Weitzl, Clemens Hutzinger and Udo Wagner

The study of shame has a long tradition in intra- and inter-personal psychology. This paper aims to investigate whether consumers can experience brand shame after self-relevant…

4070

Abstract

Purpose

The study of shame has a long tradition in intra- and inter-personal psychology. This paper aims to investigate whether consumers can experience brand shame after self-relevant consumption incidents. Specifically, this research proposes that consumers follow a complex shame-inducing process in the aftermath of unpleasant experiences involving their favorite brand. The moderating role of relational tie strength between consumers and their favorite brand existing prior to symbolic failures is examined.

Design/methodology/approach

A scenario-based, online survey (n = 660) among consumers who have recently experienced a self-relevant failure with their favorite brand was conducted. Confirmatory factor analysis ensured the reliability and validity of the measurement model. For testing the conceptual model, data was analyzed by means of a moderated mediation analysis. The proposed model was tested against, among others, common method bias and alternative models. The findings were cross-validated with a scenario-based online experiment (n = 1,616).

Findings

Results show that brand shame is a key mediator between customer dissatisfaction and brand anger when self-relevant, symbolic failures happen. Moreover, strong consumer-brand identification triggers brand-detrimental effects. It is shown to influence the connection between consumers’ inward- (i.e. brand shame) and resulting outward-directed (i.e. brand anger) negative emotions on brands, which lead to consumer vengeance.

Originality/value

To the best of the authors’ knowledge, this research is the first to introduce the concept of situational brand shame to the literature on favorite brands. Furthermore, it shows that consumer-brand identification moderates the direct and indirect (via brand shame) unfavorable effects of failure-induced dissatisfaction on brand anger. This research adds insights to the investigation of the “love-becomes-hate” effect arising after self-relevant failures involving consumers’ most preferred brand.

Details

Journal of Product & Brand Management, vol. 33 no. 1
Type: Research Article
ISSN: 1061-0421

Keywords

Article
Publication date: 1 August 2002

Wolfgang Drechsler

The essay narrates and analyzes Eugen Dühring’s remotion, i.e. the taking away of his status as Privatdozent, and thereby of his right to teach at a university, by the Prussian…

Abstract

The essay narrates and analyzes Eugen Dühring’s remotion, i.e. the taking away of his status as Privatdozent, and thereby of his right to teach at a university, by the Prussian Minister of Culture in 1877. After sketching out the background of the University of Berlin, the institution of Privatdozent, and Dühring himself, first, Dühring’s 1875 clash with Adolph Wagner is described, which put him on “probation”. Then, the 1877 scandal is looked at in detail, and the accusations against Dühring by the Faculty of Philosophy – mainly libel and insult – checked against the facts. It is argued that, while there might have been a point in Dühring’s charge of plagiarism against the physicist Helmholtz regarding the first law of thermodynamics, Dühring was generally guilty as charged, and that his remotion was certainly legal. As far as the legitimacy of this harsh measure is concerned, the case is less clear, but in the end, it is claimed that the remotion was legitimate as well.

Details

Journal of Economic Studies, vol. 29 no. 4/5
Type: Research Article
ISSN: 0144-3585

Keywords

Article
Publication date: 1 July 1997

Chi‐nien Chung

In this paper, I demonstrate an alternative explanation to the development of the American electricity industry. I propose a social embeddedness approach (Granovetter, 1985, 1992…

Abstract

In this paper, I demonstrate an alternative explanation to the development of the American electricity industry. I propose a social embeddedness approach (Granovetter, 1985, 1992) to interpret why the American electricity industry appears the way it does today, and start by addressing the following questions: Why is the generating dynamo located in well‐connected central stations rather than in isolated stations? Why does not every manufacturing firm, hospital, school, or even household operate its own generating equipment? Why do we use incandescent lamps rather than arc lamps or gas lamps for lighting? At the end of the nineteenth century, the first era of the electricity industry, all these technical as well as organizational forms were indeed possible alternatives. The centralized systems we see today comprise integrated, urban, central station firms which produce and sell electricity to users within a monopolized territory. Yet there were visions of a more decentralized electricity industry. For instance, a geographically decentralized system might have dispersed small systems based around an isolated or neighborhood generating dynamo; or a functionally decentralized system which included firms solely generating and transmitting the power, and selling the power to locally‐owned distribution firms (McGuire, Granovetter, and Schwartz, forthcoming). Similarly, the incandescent lamp was not the only illuminating device available at that time. The arc lamp was more suitable for large‐space lighting than incandescent lamps; and the second‐generation gas lamp ‐ Welsbach mantle lamp ‐ was much cheaper than the incandescent electric light and nearly as good in quality (Passer, 1953:196–197).

Details

International Journal of Sociology and Social Policy, vol. 17 no. 7/8
Type: Research Article
ISSN: 0144-333X

Article
Publication date: 18 September 2009

Rolf van Dick, Jost Stellmacher, Ulrich Wagner, Gunnar Lemmer and Patrick A. Tissington

Social loafing is described in the literature as a frequent problem reducing individuals' performance when working in groups. This paper aims to utilize the social identity…

6017

Abstract

Purpose

Social loafing is described in the literature as a frequent problem reducing individuals' performance when working in groups. This paper aims to utilize the social identity approach and proposes that under conditions of heightened group salience social loafing can be reduced and turned into social laboring (i.e. increased performance).

Design/methodology/approach

Two experimental studies are conducted to examine the impact of participant's group membership salience on task performance. In Study 1, school teachers work either in coactive or in collective working conditions on brainstorming tasks. In Study 2, participants perform both a brainstorming task and a motor task.

Findings

The results show social laboring effects. As predicted, participants in the high salient group conditions outperform participants in the low salient group conditions and the coactive individual condition.

Practical implications

The results indicate that rather than individuating group members or tasks to overcome social loafing, managers can increase group performance by focusing on group members' perceptions of their groups as important and salient.

Originality/value

The studies presented in this paper show that social identity theory and self categorization theory can fruitfully be applied to the field of group performance. The message of these studies for applied settings is that collective work in groups must not necessarily negatively impact performance, i.e. social loafing. By heightening the salience of group memberships groups can even outperform coactively working individuals.

Details

Journal of Managerial Psychology, vol. 24 no. 7
Type: Research Article
ISSN: 0268-3946

Keywords

Article
Publication date: 14 June 2011

Yi Heng, Maka Karalashvili, Adel Mhamdi and Wolfgang Marquardt

The purpose of this paper is to present an efficient algorithm based on a multi‐level adaptive mesh refinement strategy for the solution of ill‐posed inverse heat conduction…

Abstract

Purpose

The purpose of this paper is to present an efficient algorithm based on a multi‐level adaptive mesh refinement strategy for the solution of ill‐posed inverse heat conduction problems arising in pool boiling using few temperature observations.

Design/methodology/approach

The stable solution of the inverse problem is obtained by applying the conjugate gradient method for the normal equation method together with a discrepancy stopping rule. The resulting three‐dimensional direct, adjoin and sensitivity problems are solved numerically by a space‐time finite element method. A multi‐level computational approach, which uses an a posteriori error estimator to adaptively refine the meshes on different levels, is proposed to speed up the entire inverse solution procedure.

Findings

This systematic approach can efficiently solve the large‐scale inverse problem considered without losing necessary detail in the estimated quantities. It is shown that the choice of different termination parameters in the discrepancy stopping conditions for each level is crucial for obtaining a good overall estimation quality. The proposed algorithm has also been applied to real experimental data in pool boiling. It shows high computational efficiency and good estimation quality.

Originality/value

The high efficiency of the approach presented in the paper allows the fast processing of experimental data at many operating conditions along the entire boiling curve, which has been considered previously as computationally intractable. The present study is the authors' first step towards a systematic approach to consider an adaptive mesh refinement for the solution of large‐scale inverse boiling problems.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 21 no. 5
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 26 October 2010

Gabriele Wagner and Uwe Vormbusch

Multinational companies are considered “driving forces” of globalization and “prime movers” of global sociation. Yet the problems, conflicts, and contradictions in the…

1037

Abstract

Purpose

Multinational companies are considered “driving forces” of globalization and “prime movers” of global sociation. Yet the problems, conflicts, and contradictions in the implementation of global strategies at the micro level – as well as the real possibility that such implementation will fail – are virtually ignored in macro‐sociological studies. Hence, the purpose of this paper is to address this neglect by focusing on a micro level examination of the contribution of expatriates in their interactive role as facilitators and managers, and, their informal social networks.

Design/methodology/approach

The interpretation of how global structures are concretely organized and sustained is based on case studies and interviews with German expatriates in Russia. The article examines two particular aspects: the contribution of expatriates in their interactive roles, on the one hand, and their informal social circles, on the other. The analytical framework draws on the concept of “global microstructures”.

Findings

Expatriates must maneuver between the conflicts and contradictions that surface from the three‐way relationship between head office, branch office, and the market, and their respective local institutionalized pressures. It is argued that such conflicts and contradictions cannot be resolved within the formal structure of organizations and that, as a result, they are shifted to the level of interpersonal interaction or to informal networks. Global reach as well as microsocial foundations therefore characterize the expatriate's action system.

Research limitations/implications

Since the study is restricted to German expatriates in Russia, further comparative research is needed to sustain the findings for other institutional and cultural settings.

Practical implications

The findings raise awareness both of the contradictory demands expatriates are confronted with in their everyday work as well as their unique resources. They could contribute to better management training and preparation for expatriates prior to their move abroad.

Originality/value

The paper presents a micro‐sociological view on how systemic integration is actually achieved through a globally stretched as well as locally specified network of interaction. It could be valuable for international strategy definition as well as for personnel managers, and future expatriates themselves.

Details

Critical perspectives on international business, vol. 6 no. 4
Type: Research Article
ISSN: 1742-2043

Keywords

Article
Publication date: 1 December 1996

Marc Szydlik

This paper addresses the perceived closeness of the relation between East and West German adult children and their parents who no longer live in the same household. The empirical…

Abstract

This paper addresses the perceived closeness of the relation between East and West German adult children and their parents who no longer live in the same household. The empirical analyses are based on the German Socio‐Economic Panel (GSOEP). They show that East German family relations are closer than West German relations. Regarding the causes for closer or weaker relations for East and West Germans there are both similarities and differences. For example, the empirical analyses indicate differences regarding the importance of standard of living, birth cohort, and religion.

Details

International Journal of Sociology and Social Policy, vol. 16 no. 12
Type: Research Article
ISSN: 0144-333X

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