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Institution

University of Graz

EducationGraz, Steiermark, Austria
About: University of Graz is a education organization based out in Graz, Steiermark, Austria. It is known for research contribution in the topics: Population & Quantum chromodynamics. The organization has 17934 authors who have published 37489 publications receiving 1110980 citations. The organization is also known as: Carolo Franciscea Graecensis & Karl Franzens Universität.


Papers
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Journal ArticleDOI
Daniel Kraft1
TL;DR: This work model mining as a Poisson process with time-dependent intensity and uses this model to derive predictions about block times for various hash-rate scenarios, and analyses Bitcoin’s method to update the “network difficulty” as a mechanism to keep block times stable.
Abstract: Crypto-currencies like Bitcoin have recently attracted a lot of interest. A crucial ingredient into such systems is the “mining” of a Nakamoto blockchain. We model mining as a Poisson process with time-dependent intensity and use this model to derive predictions about block times for various hash-rate scenarios (exponentially rising hash rate being the most important). We also analyse Bitcoin’s method to update the “network difficulty” as a mechanism to keep block times stable. Since it yields systematically too fast blocks for exponential hash-rate growth, we propose a new method to update difficulty. Our proposed method performs much better at ensuring stable average block times over longer periods of time, which we verify both in simulations of artificial growth scenarios and with real-world data. Besides Bitcoin itself, this has practical benefits particularly for systems like Namecoin. It can be used to make name expiration times more predictable, preventing accidental loss of names.

247 citations

Journal ArticleDOI
TL;DR: In this paper, a chiral constituent-quark model for light and strange baryons is presented, which provides a unified description of their ground states and excitation spectra.
Abstract: We present a chiral constituent-quark model for light and strange baryons providing a unified description of their ground states and excitation spectra. The model relies on constituent quarks and Goldstone bosons arising as effective degrees of freedom of low-energy QCD from the spontaneous breaking of chiral symmetry. The spectra of the three-quark systems are obtained from a precise variational solution of a Schr\"odinger-type equation with a semirelativistic Hamiltonian. The theoretical predictions are found to be in close agreement with experiment.

246 citations

Journal ArticleDOI
11 May 2017-Allergy
TL;DR: A systematic review to assess the effectiveness, cost‐effectiveness, and safety of AIT in the management of allergic rhinoconjunctivitis found it to be effective, cost-effective, and safe.
Abstract: Background: The European Academy of Allergy and Clinical Immunology (EAACI) is in the process of developing Guidelines on Allergen Immunotherapy (AIT) for Allergic Rhinoconjunctivitis. To inform the development of clinical recommendations, we undertook a systematic review to assess the effectiveness, cost-effectiveness, and safety of AIT in the management of allergic rhinoconjunctivitis. Methods: We searched nine international biomedical databases for published, in-progress, and unpublished evidence. Studies were independently screened by two reviewers against predefined eligibility criteria and critically appraised using established instruments. Our primary outcomes of interest were symptom, medication, and combined symptom and medication scores. Secondary outcomes of interest included cost-effectiveness and safety. Data were descriptively summarized and then quantitatively synthesized using random-effects meta-analyses. Results: We identified 5960 studies of which 160 studies satisfied our eligibility criteria. There was a substantial body of evidence demonstrating significant reductions in standardized mean differences (SMD) of symptom (SMD −0.53, 95% CI −0.63, −0.42), medication (SMD −0.37, 95% CI −0.49, −0.26), and combined symptom and medication (SMD −0.49, 95% CI −0.69, −0.30) scores while on treatment that were robust to prespecified sensitivity analyses. There was in comparison a more modest body of evidence on effectiveness post-discontinuation of AIT, suggesting a benefit in relation to symptom scores. Conclusions: AIT is effective in improving symptom, medication, and combined symptom and medication scores in patients with allergic rhinoconjunctivitis while on treatment, and there is some evidence suggesting that these benefits are maintained in relation to symptom scores after discontinuation of therapy.

246 citations

Journal ArticleDOI
TL;DR: In this article, the authors compared graphite powders and carbon fibres as model materials for X-ray photoemission spectroscopy (XPS) studies of the effects of surface pre-treatment.

245 citations

Journal ArticleDOI
TL;DR: Latent variable modeling confirmed the significance of dissociation and associative combination for creativity, but also substantiates the relevance of basic associative retrieval processes for intelligence.
Abstract: Empirical approaches to cognitive ability claim that divergent thinking represents a useful estimate for the potential of creative thought. According to associative approaches, the ability to fluently retrieve and combine remote associations was suggested to facilitate creative solutions. Taken together, these approaches suggest a close relationship of associative processes and divergent thinking, which so far, however, has not been properly tested. Therefore, the present study examines the validity of associative abilities with respect to divergent thinking, and also, on a more general level, with respect to creativity and intelligence. Four different word-association tasks were employed to assess associative fluency, associative flexibility, dissociative ability, and the ability of associative combination. The sample comprised 150 students from studies with varying amount of creativity-related demands. Associative abilities were found to explain about half of the variance of divergent thinking ability. Latent variable modeling confirmed the significance of dissociation and associative combination for creativity, but also substantiates the relevance of basic associative retrieval processes for intelligence. It is concluded that associative abilities represent valid elementary cognitive abilities underlying creativity.

244 citations


Authors

Showing all 18136 results

NameH-indexPapersCitations
David Haussler172488224960
Russel J. Reiter1691646121010
Frederik Barkhof1541449104982
Philip Scheltens1401175107312
Christopher D.M. Fletcher13867482484
Jennifer S. Haas12884071315
Jelena Krstic12683973457
Michael A. Kamm12463753606
Frances H. Arnold11951049651
Gert Pfurtscheller11750762873
Georg Kresse111430244729
Manfred T. Reetz11095942941
Alois Fürstner10845943085
David N. Herndon108122754888
David J. Williams107206062440
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
2023174
2022422
20211,775
20201,759
20191,649
20181,541