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Institution

Sogang University

EducationSeoul, South Korea
About: Sogang University is a education organization based out in Seoul, South Korea. It is known for research contribution in the topics: Black hole & Thin film. The organization has 6292 authors who have published 12418 publications receiving 213643 citations. The organization is also known as: SU.


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TL;DR: TAUT provides a useful tool for managers needing to assess the likelihood of success for new technology introductions and helps them understand the drivers of acceptance in order to proactively design interventions targeted at populations of users that may be less inclined to adopt and use new systems.
Abstract: Information technology (IT) acceptance research has yielded many competing models, each with different sets of acceptance determinants. In this paper, we: (1) review user acceptance literature and discuss eight prominent models, (2) empirically compare the eight models and their extensions, (3) formulate a unified model that integrates elements across the eight models, and (4) empirically validate the unified model. The eight models reviewed are the theory of reasoned action, the technology acceptance model, the motivational model, the theory of planned behavior, a model combining the technology acceptance model and the theory of planned behavior, the model of PC utilization, the innovation diffusion theory, and the social cognitive theory. Using data from four organizations over a six-month period with three points of measurement, the eight models explained between 17 percent and 53 percent of the variance in user intentions to use information technology. Next, a unified model, called the Unified Theory of Acceptance and Use of Technology (UTAUT), was formulated, with four core determinants of intention and usage, and up to four moderators of key relationships. UTAUT was then tested using the original data and found to outperform the eight individual models (adjusted R2 of 69 percent). UTAUT was then confirmed with data from two new organizations with similar results (adjusted R2 of 70 percent). UTAUT thus provides a useful tool for managers needing to assess the likelihood of success for new technology introductions and helps them understand the drivers of acceptance in order to proactively design interventions (including training, marketing, etc.) targeted at populations of users that may be less inclined to adopt and use new systems. The paper also makes several recommendations for future research including developing a deeper understanding of the dynamic influences studied here, refining measurement of the core constructs used in UTAUT, and understanding the organizational outcomes associated with new technology use.

5,658 citations

Journal ArticleDOI
TL;DR: A traffic model and analysis for cellular mobile radio telephone systems with handoff, which shows, for example, blocking probability, forced termination probability, and fraction of new calls not completed, as functions of pertinent system parameters.
Abstract: A traffic model and analysis for cellular mobile radio telephone systems with handoff are described. Three schemes for call traffic handling are considered. One is nonprioritized and two are priority oriented. Fixed channel assignment is considered. In the nonprioritized scheme the base stations make no distinction between new call attempts and handoff attempts. Attempts which find all channels occupied are cleared. In the first priority scheme considered, a fixed number of channels in each cell are reserved exclusively for handoff calls. The second priority scheme employs a similar channel assignment strategy, but, additionally, the queueing of handoff attempts is allowed. Appropriate analytical models and criteria are developed and used to derive performance characteristics. These show, for example, blocking probability, forced termination probability, and fraction of new calls not completed, as functions of pertinent system parameters. General formulas are given and specific numerical results for nominal system parameters are presented.

1,654 citations

Journal ArticleDOI
03 Oct 2016-PLOS ONE
TL;DR: The objective is to understand the current research topics, challenges and future directions regarding Blockchain technology from the technical perspective, and recommendations on future research directions are provided for researchers.
Abstract: Blockchain is a decentralized transaction and data management technology developed first for Bitcoin cryptocurrency. The interest in Blockchain technology has been increasing since the idea was coined in 2008. The reason for the interest in Blockchain is its central attributes that provide security, anonymity and data integrity without any third party organization in control of the transactions, and therefore it creates interesting research areas, especially from the perspective of technical challenges and limitations. In this research, we have conducted a systematic mapping study with the goal of collecting all relevant research on Blockchain technology. Our objective is to understand the current research topics, challenges and future directions regarding Blockchain technology from the technical perspective. We have extracted 41 primary papers from scientific databases. The results show that focus in over 80% of the papers is on Bitcoin system and less than 20% deals with other Blockchain applications including e.g. smart contracts and licensing. The majority of research is focusing on revealing and improving limitations of Blockchain from privacy and security perspectives, but many of the proposed solutions lack concrete evaluation on their effectiveness. Many other Blockchain scalability related challenges including throughput and latency have been left unstudied. On the basis of this study, recommendations on future research directions are provided for researchers.

1,528 citations

Journal ArticleDOI
TL;DR: The thermal expansion coefficient (TEC) of single-layer graphene is estimated with temperature-dependent Raman spectroscopy in the temperature range between 200 and 400 K.
Abstract: The thermal expansion coefficient (TEC) of single-layer graphene is estimated with temperature-dependent Raman spectroscopy in the temperature range between 200 and 400 K. It is found to be strongly dependent on temperature but remains negative in the whole temperature range with a room temperature value of (−8.0 ± 0.7) × 10–6 K–1. The strain caused by the TEC mismatch between graphene and the substrate plays a crucial role in determining the physical properties of graphene, and hence its effect must be accounted for in the interpretation of experimental data taken at cryogenic or elevated temperatures.

865 citations

Journal ArticleDOI
Daniel F. Gudbjartsson1, Unnur S. Bjornsdottir2, Unnur S. Bjornsdottir1, Eva Halapi1, Anna Helgadottir1, Patrick Sulem1, Gudrun M. Jonsdottir1, Gudmar Thorleifsson1, Hafdis T. Helgadottir1, Valgerdur Steinthorsdottir1, Hreinn Stefansson1, Carolyn Williams3, Jennie Hui3, John Beilby3, Nicole M. Warrington3, Alan L. James4, Alan L. James3, Lyle J. Palmer3, Gerard H. Koppelman5, Andrea Heinzmann6, Marcus Krueger6, H. Marike Boezen7, Amanda Wheatley8, Janine Altmüller9, Hyoung Doo Shin10, Soo-Taek Uh11, Hyun Sub Cheong11, Brynja Jonsdottir, David Gislason, Choon-Sik Park11, Linda M. Rasmussen12, Celeste Porsbjerg12, Jakob Werner Hansen12, Vibeke Backer12, Thomas Werge, Christer Janson13, Ulla-Britt Jönsson13, Maggie C.Y. Ng14, Juliana C.N. Chan14, Wing-Yee So14, Ronald C.W. Ma14, Svati H. Shah15, Christopher B. Granger15, Arshed A. Quyyumi16, Allan I. Levey16, Viola Vaccarino16, Muredach P. Reilly17, Daniel J. Rader17, Michael J.A. Williams18, Andre M. van Rij18, Gregory T. Jones18, Elisabetta Trabetti19, Giovanni Malerba19, Pier Franco Pignatti19, Attilio Boner19, Lydia Pescollderungg, Domenico Girelli19, Oliviero Olivieri19, Nicola Martinelli19, Bjorn R. Ludviksson2, Dora Ludviksdottir, Gudmundur I. Eyjolfsson, David O. Arnar2, Gudmundur Thorgeirsson2, Klaus A. Deichmann6, Philip J. Thompson3, Matthias Wjst, Ian P. Hall9, Dirkje S. Postma7, Thorarinn Gislason2, Jeffrey R. Gulcher1, Augustine Kong1, Ingileif Jonsdottir2, Ingileif Jonsdottir1, Unnur Thorsteinsdottir1, Unnur Thorsteinsdottir2, Kari Stefansson1, Kari Stefansson2 
TL;DR: A genome-wide association scan for sequence variants affecting eosinophil counts in blood of 9,392 Icelanders found that a nonsynonymous SNP at 12q24, in SH2B3, associated significantly with myocardial infarction in six different populations.
Abstract: Eosinophils are pleiotropic multifunctional leukocytes involved in initiation and propagation of inflammatory responses and thus have important roles in the pathogenesis of inflammatory diseases. Here we describe a genome-wide association scan for sequence variants affecting eosinophil counts in blood of 9,392 Icelanders. The most significant SNPs were studied further in 12,118 Europeans and 5,212 East Asians. SNPs at 2q12 (rs1420101), 2q13 (rs12619285), 3q21 (rs4857855), 5q31 (rs4143832) and 12q24 (rs3184504) reached genome-wide significance (P = 5.3 x 10(-14), 5.4 x 10(-10), 8.6 x 10(-17), 1.2 x 10(-10) and 6.5 x 10(-19), respectively). A SNP at IL1RL1 associated with asthma (P = 5.5 x 10(-12)) in a collection of ten different populations (7,996 cases and 44,890 controls). SNPs at WDR36, IL33 and MYB that showed suggestive association with eosinophil counts were also associated with atopic asthma (P = 4.2 x 10(-6), 2.2 x 10(-5) and 2.4 x 10(-4), respectively). We also found that a nonsynonymous SNP at 12q24, in SH2B3, associated significantly (P = 8.6 x 10(-8)) with myocardial infarction in six different populations (6,650 cases and 40,621 controls).

754 citations


Authors

Showing all 6340 results

NameH-indexPapersCitations
Manfred T. Reetz11095942941
Peng Wang108167254529
Gynheung An9838927386
Y. R. Shen9847637313
Juan J. de Pablo9262231793
Luke P. Lee8441322803
John J. Oh8427252764
Wonwoo Nam8440523475
Sangmin Lee8128930324
Masayoshi Tomizuka80111130069
Kookheon Char7043116484
Barry C. Sanders6756018474
Young Hae Choi6625514921
Kevin Kit Parker6621115241
Hyunjoo Lee6247516302
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202320
202291
2021626
2020626
2019678
2018581