Institution
University of Jyväskylä
Education•Jyvaskyla, Finland•
About: University of Jyväskylä is a education organization based out in Jyvaskyla, Finland. It is known for research contribution in the topics: Population & Context (language use). The organization has 8066 authors who have published 25168 publications receiving 725033 citations. The organization is also known as: Jyväskylän yliopisto & Kasvatusopillinen korkeakoulu.
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Papers
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TL;DR: In this article, the authors present trends in the grain boundaries of graphene and use density-functional tight-binding method to calculate trends in energy, atomic structure (polygon composition), chemical reactivity (dangling bond density), corrugation heights (inflection angles), and dynamical properties (vibrations), as a function of lattice orientation mismatch.
Abstract: Grain boundaries are topological defects that often have a disordered character. Disorder implies that understanding general trends is more important than accurate investigations of individual grain boundaries. Here we present trends in the grain boundaries of graphene. We use density-functional tight-binding method to calculate trends in energy, atomic structure (polygon composition), chemical reactivity (dangling bond density), corrugation heights (inflection angles), and dynamical properties (vibrations), as a function of lattice orientation mismatch. The observed trends and their mutual interrelations are plausibly explained by structure, and supported by past experiments.
171 citations
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TL;DR: Persistent participation in leisure-time physical activity is associated with decreased rate of weight gain and with a smaller waist circumference to a clinically significant extent even after partially controlling for genetic liability and childhood environment.
Abstract: Physical activity level and obesity are both partly determined by genes and childhood environment. To determine the associations between long-term leisure-time physical activity, weight gain and waist circumference and whether these are independent of genes and childhood effects. The study design is a 30-year follow-up twin study in Finland. For this study, 146 twin pairs were comprehensively identified from the large Finnish Twin Cohort. These twin pairs were discordant for both intensity and volume of leisure physical activity in 1975 and 1981 and were healthy in 1981. At follow-up in 2005, both members of 89 pairs were alive and participated in a structured telephone interview. In the interview self-measured weight and waist circumference, and physical activity level for the whole follow-up were assessed. Paired tests were used in the statistical analyses. Waist circumference at 30-year follow-up (2005) and change in weight from 1975 to 2005. In the 42 twin pairs discordant for physical activity at all time points during the 30-year period, the mean weight gain from 1975 through 2005 was 5.4 kg (95% confidence interval (CI) 2.0–8.9) less in the active compared to inactive co-twins (paired t-test, P=0.003). In 2005, the mean waist circumference was 8.4 cm (95% CI 4.0–12.7) less in the active compared with inactive co-twins (P<0.001). These trends were similar for both monozygotic and dizygotic twin pairs. Pairwise differences in weight gain and waist circumference were not seen in the 47 twin pairs, who were not consistently discordant for physical activity. Persistent participation in leisure-time physical activity is associated with decreased rate of weight gain and with a smaller waist circumference to a clinically significant extent even after partially controlling for genetic liability and childhood environment.
171 citations
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TL;DR: It is concluded that tall height, poor physical conditioning, low hip BMC and BMD, as well as high serum PTH level are risk factors for stress fractures in male Finnish military recruits.
171 citations
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TL;DR: The recruitment threshold may be lower in dynamic as compared to isometric actions, and the recruitment of fast motor units may continue to higher force levels in isometric and in concentric as in eccentric actions.
171 citations
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TL;DR: In this article, the authors identify concepts and methods for studying collaboration in context and present a two-level methodology designed to combine individual and group-level perspectives for the evaluation of collaborative knowledge construction in student groups.
170 citations
Authors
Showing all 8239 results
Name | H-index | Papers | Citations |
---|---|---|---|
Brenda W.J.H. Penninx | 170 | 1139 | 119082 |
Mika Kivimäki | 166 | 1515 | 141468 |
Jaakko Kaprio | 163 | 1532 | 126320 |
Marvin Johnson | 149 | 1827 | 119520 |
Stanislas Dehaene | 149 | 456 | 86539 |
Roger Jones | 138 | 998 | 114061 |
Zubayer Ahammed | 129 | 912 | 59811 |
James Alexander | 129 | 886 | 75096 |
Matti J Kortelainen | 128 | 1186 | 80603 |
Madan M. Aggarwal | 124 | 883 | 56065 |
Joakim Nystrand | 117 | 658 | 50146 |
Robert U. Newton | 109 | 753 | 42527 |
Dieter Røhrich | 102 | 637 | 35942 |
Keijo Häkkinen | 99 | 421 | 31355 |
Dong Jo Kim | 98 | 497 | 36272 |