J
Jörn Altmann
Researcher at Seoul National University
Publications - 224
Citations - 3371
Jörn Altmann is an academic researcher from Seoul National University. The author has contributed to research in topics: Cloud computing & The Internet. The author has an hindex of 28, co-authored 215 publications receiving 3030 citations. Previous affiliations of Jörn Altmann include Hewlett-Packard & University of Erlangen-Nuremberg.
Papers
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Journal ArticleDOI
Identifying the effects of co-authorship networks on the performance of scholars: A correlation and regression analysis of performance measures and social network analysis measures
TL;DR: A theoretical model based on social network theories and analytical methods for exploring collaboration (co-authorship) networks of scholars suggests that the professional social network of researchers can be used to predict the future performance of researchers.
Journal ArticleDOI
Social commerce development in emerging markets
TL;DR: The findings show the importance of governing form factors such as mobile system in the development of social commerce in emerging markets and familiarity and trust play a major role in mediating exchange between sellers and buyers and its positive effects in buyers’ perceived usefulness of each social commerce platform.
Proceedings ArticleDOI
On the Correlation between Research Performance and Social Network Analysis Measures Applied to Research Collaboration Networks
Alireza Abbasi,Jörn Altmann +1 more
TL;DR: A theoretical model based on social network theory shows that scholars, who maintain a strong co-authorship relationship to only one co-author of a group of linked co-authors, perform better than those researchers with many relationships to the same group of links.
Journal ArticleDOI
Cost model based service placement in federated hybrid clouds
TL;DR: This paper suggests a cost model for the most general form of a cloud, namely federated hybrid clouds, which is composed of a private cloud and a number of interoperable public clouds and shows that the service placement algorithm with the cost model minimizes the spending for computational services.
Posted ContentDOI
A Review of Renewable Energy Supply and Energy Efficiency Technologies
TL;DR: In recent years, the increasing prices of fossil fuels and concerns about the environm... as discussed by the authors have led to a significant increase in electricity consumption in the world, accounting for an increasing share of global energy demand.