Institution
Aalborg University
Education•Aalborg, Denmark•
About: Aalborg University is a education organization based out in Aalborg, Denmark. It is known for research contribution in the topics: Population & Wind power. The organization has 14395 authors who have published 45630 publications receiving 1257866 citations. The organization is also known as: AAU & Aalborg Universitet.
Topics: Population, Wind power, Electric power system, Control theory, Microgrid
Papers published on a yearly basis
Papers
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TL;DR: The authors examines five common misunderstandings about case-study research: theoretical knowledge is more valuable than practical knowledge, one cannot generalize from a single case, therefore, the single-case study cannot contribute to scientific development, the case study is most useful for generating hypotheses, whereas other methods are more suitable for hypotheses testing and theory building, case study contains a bias toward verification, and it is often difficult to summarize specific case studies.
Abstract: This article examines five common misunderstandings about case-study research: (a) theoretical knowledge is more valuable than practical knowledge; (b) one cannot generalize from a single case, therefore, the single-case study cannot contribute to scientific development; (c) the case study is most useful for generating hypotheses, whereas other methods are more suitable for hypotheses testing and theory building; (d) the case study contains a bias toward verification; and (e) it is often difficult to summarize specific case studies. This article explains and corrects these misunderstandings one by one and concludes with the Kuhnian insight that a scientific discipline without a large number of thoroughly executed case studies is a discipline without systematic production of exemplars, and a discipline without exemplars is an ineffective one. Social science may be strengthened by the execution of a greater number of good case studies.
8,876 citations
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Clotilde Théry1, Kenneth W. Witwer2, Elena Aikawa3, María José Alcaraz4 +414 more•Institutions (209)
TL;DR: The MISEV2018 guidelines include tables and outlines of suggested protocols and steps to follow to document specific EV-associated functional activities, and a checklist is provided with summaries of key points.
Abstract: The last decade has seen a sharp increase in the number of scientific publications describing physiological and pathological functions of extracellular vesicles (EVs), a collective term covering various subtypes of cell-released, membranous structures, called exosomes, microvesicles, microparticles, ectosomes, oncosomes, apoptotic bodies, and many other names. However, specific issues arise when working with these entities, whose size and amount often make them difficult to obtain as relatively pure preparations, and to characterize properly. The International Society for Extracellular Vesicles (ISEV) proposed Minimal Information for Studies of Extracellular Vesicles (“MISEV”) guidelines for the field in 2014. We now update these “MISEV2014” guidelines based on evolution of the collective knowledge in the last four years. An important point to consider is that ascribing a specific function to EVs in general, or to subtypes of EVs, requires reporting of specific information beyond mere description of function in a crude, potentially contaminated, and heterogeneous preparation. For example, claims that exosomes are endowed with exquisite and specific activities remain difficult to support experimentally, given our still limited knowledge of their specific molecular machineries of biogenesis and release, as compared with other biophysically similar EVs. The MISEV2018 guidelines include tables and outlines of suggested protocols and steps to follow to document specific EV-associated functional activities. Finally, a checklist is provided with summaries of key points.
5,988 citations
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TL;DR: In this paper, a simple formulation of a generalized gradient approximation for the exchange and correlation energy of electrons has been proposed by Perdew, Burke, and Ernzerhof (PBE), which improves the chemisorption energy of atoms and molecules on transition-metal surfaces.
Abstract: A simple formulation of a generalized gradient approximation for the exchange and correlation energy of electrons has been proposed by Perdew, Burke, and Ernzerhof (PBE) [Phys. Rev. Lett. 77, 3865 (1996)]. Subsequently Zhang and Yang [Phys. Rev. Lett. 80, 890 (1998)] have shown that a slight revision of the PBE functional systematically improves the atomization energies for a large database of small molecules. In the present work, we show that the Zhang and Yang functional (revPBE) also improves the chemisorption energetics of atoms and molecules on transition-metal surfaces. Our test systems comprise atomic and molecular adsorption of oxygen, CO, and NO on Ni(100), Ni(111), Rh(100), Pd(100), and Pd(111) surfaces. As the revPBE functional may locally violate the Lieb-Oxford criterion, we further develop an alternative revision of the PBE functional, RPBE, which gives the same improvement of the chemisorption energies as the revPBE functional at the same time as it fulfills the Lieb-Oxford criterion locally.
5,971 citations
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TL;DR: In the Global Burden of Disease Study 2013 (GBD 2013) as discussed by the authors, the authors used the GBD 2010 methods with some refinements to improve accuracy applied to an updated database of vital registration, survey, and census data.
5,792 citations
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Mohammad H. Forouzanfar1, Lily Alexander, H. Ross Anderson, Victoria F Bachman1 +733 more•Institutions (289)
TL;DR: The Global Burden of Disease, Injuries, and Risk Factor study 2013 (GBD 2013) as discussed by the authors provides a timely opportunity to update the comparative risk assessment with new data for exposure, relative risks, and evidence on the appropriate counterfactual risk distribution.
5,668 citations
Authors
Showing all 14624 results
Name | H-index | Papers | Citations |
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Camilla Urup Noe Andersson | 1 | 1 | 19 |
Tobias Krøgholt | 1 | 1 | 16 |
Christopher Schinkel Carlsen | 1 | 1 | 3 |
Markus Berthold | 1 | 1 | 3 |
Finn Redke | 1 | 3 | 4 |
S.M. Paulsen | 1 | 1 | 8 |
Louise Takeda | 1 | 1 | 67 |
Frederik Tophøj | 1 | 1 | 2 |
P. Hjorth | 1 | 1 | 1 |
Carina Hedberg | 1 | 1 | 5 |
Asiah Rahi Sherzaman | 1 | 1 | 3 |
E. Berg Schmidt | 1 | 3 | 47 |
Peter Krogsgaard Jensen | 1 | 1 | 14 |
Pernille Malberg | 1 | 1 | 8 |
V. Prasad Goluguri | 1 | 1 | 4 |