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552 results on '"Hedström, Peter"'

54. MiniMelt: An instrument for real-time tracking of electron beam additive manufacturing using synchrotron x-ray techniques

Author

König, Hans-Henrik, primary, Semjatov, Nick, additional, Spartacus, Gabriel, additional, Bidola, Pidassa, additional, Ioannidou, Chrysoula, additional, Ye, Jihui, additional, Renner, Jakob, additional, Lienert, Ulrich, additional, Faria, Guilherme Abreu, additional, Wahlmann, Benjamin, additional, Wildheim, Martin, additional, Ackelid, Ulf, additional, Beckmann, Felix, additional, Staron, Peter, additional, Hedström, Peter, additional, Körner, Carolin, additional, and Lindwall, Greta, additional

Published
2023
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60. Identifying Complex Dynamics in Social Systems: A New Methodological Approach Applied to Study School Segregation

Author

Spaiser, Viktoria, Hedström, Peter, Ranganathan, Shyam, Jansson, Kim, Nordvik, Monica K., and Sumpter, David J. T.

Abstract

It is widely recognized that segregation processes are often the result of complex nonlinear dynamics. Empirical analyses of complex dynamics are however rare, because there is a lack of appropriate empirical modeling techniques that are capable of capturing complex patterns and nonlinearities. At the same time, we know that many social phenomena display nonlinearities. In this article, we introduce a new modeling tool in order to partly fill this void in the literature. Using data of all secondary schools in Stockholm county during the years 1990 to 2002, we demonstrate how the methodology can be applied to identify complex dynamic patterns like tipping points and multiple phase transitions with respect to segregation. We establish critical thresholds in schools' ethnic compositions, in general, and in relation to various factors such as school quality and parents' income, at which the schools are likely to tip and become increasingly segregated.

Published
2018
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89. Overview of sample enironments for research use at the PETRA III Swedish Materials Science beamline

Author

Spartacus, Gabriel, Hedström, Peter, McCluskey, Denise, Zhou, Tao, and Eriksson, Fredrik

Subjects
synchrotrons, Materialteknik, Materials Engineering, Sample environments, PETRA III, Swedish beamline
Abstract

This technical report presents an overview of sample environments which are usable at the PETRA III Swedish Materials Science beamline (potentially requiring arrangement or development of the beamline layout). Alongside the description of each sample environment, illustrative materials science studies are presented that exemplify the use of these sample environments for in situ and/or in operando measurements. The sample environments are catalogued according to the research application areas, which are categorised as Thermal treatments, Electrochemistry, Catalysis, Thin films, Mechanical response of materials and Levitation. Such cataloguing means that researchers can now start their search for relevant sample environments by looking up a relevant research application area. Citations and links to specifications, published research cases and the organisation that is responsible for a given sample environment, are also provided as a basis for researchers to proceed with their research planning. QC 20230328

Published
2023

93. Kin Ties and the Performance of New Firms: A Structural Approach.

Author

Ertug, Gokhan, Kotha, Reddi, and Hedström, Peter

Subjects
KINSHIP, ORGANIZATIONAL performance, NEW business enterprises, INTERAGENCY coordination, NEPOTISM, SOCIAL marginality
Abstract

Kin ties are all but ubiquitous in new firms. However, their effects on performance are not straightforward, as they can provide new firms with advantages (enhanced coordination and cooperation) as well as disadvantages (reduced diversity, nepotism concerns, and the possible spillover of personal conflict). As kin ties may have both positive and negative implications for performance, a contingency approach to the performance of new firms is valuable. We develop such an approach by relating different structural configurations of kin ties—whether they are between founders, between founders and employees, or between employees—to the performance of new firms. We test our predictions using data on 4,967 new firms founded in Stockholm between 1998 and 2003. Our theory deepens our understanding of why kin ties have heterogeneous effects on the performance of new firms. [ABSTRACT FROM AUTHOR]

Published
2020
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