Search results for "luu"
showing 10 items of 614 documents
How Comprehensive School Students Perceive their Psychosocial School Environment
2010
The aim of this study was to describe students’ perceptions of their psychosocial school environment and to examine the associations between such perceptions and students’ perceived school performance. Our analyses were based on data from the Health Behaviour in School‐Aged Children 2006 study, involving responses by Finnish students from grades 7 and 9. The results indicated that students’ perceptions of their school environment were fairly positive, but that a remarkably large proportion of the students reported negative attitudes towards school. School engagement, school strain, and teacher‐student relations were found to be the most influential predictors in the psychosocial school envi…
Muscle Free Fatty-Acid Uptake Associates to Mechanical Efficiency During Exercise in Humans
2018
Intrinsic factors related to muscle metabolism may explain the differences in mechanical efficiency (ME) during exercise. Therefore, this study aimed to investigate the relationship between muscle metabolism and ME. Totally 17 healthy recreationally active male participants were recruited and divided into efficient (EF; n = 8) and inefficient (IE; n = 9) groups, which were matched for age (mean ± SD 24 ± 2 vs. 23 ± 2 years), BMI (23 ± 1 vs. 23 ± 2 kg m−2), physical activity levels (3.4 ± 1.0 vs. 4.1 ± 1.0 sessions/week), and V˙O2peak (53 ± 3 vs. 52 ± 3 mL kg−1 min−1), respectively, but differed for ME at 45% of V˙O2peak intensity during submaximal bicycle ergometer test (EF 20.5 ± 3.5 vs. I…
Catechol-O-Methyltransferase Gene Polymorphism Is Associated with Skeletal Muscle Properties in Older Women Alone and Together with Physical Activity
2008
BackgroundMuscle strength declines on average by one percent annually from midlife on. In postmenopausal women this decrement coincides with a rapid decline in estrogen production. The genetics underlying the effects of estrogen on skeletal muscle remains unclear. In the present study, we examined whether polymorphisms within COMT and ESR1 are associated with muscle properties and assessed their interaction and their combined effects with physical activity.Methodology/principal findingsA cross-sectional data analysis was conducted with 434 63-76-year-old women from the population-based Finnish Twin Study on Aging. Body anthropometry, muscle cross-sectional area (mCSA), isometric hand grip a…
Leaps and bounds : towards an integrative theory of cultural evolution
2014
Tutkimuksessa pyritään yhdistämään ajatus kulttuurista eräänlaisen luonnonvalinnan alaisena Dan Sperberin näkemyksien (1) kommunikaation taustadynamiikasta tarkoitet-tujen merkityksien päättelynä niiden kontekstisidonnaisen merkittävyyden perusteella ja (2) erilaisten käsityksien eri kohteista leviämisen suhteen. Tällaisen yhdentävän viiteke-hyksen turvin pyritään vastaamaan pätevästi Sperberin kritiikkiin koskien darwinilaisen luonnonvalinnan soveltamista kulttuurin ilmiöihin. Näihin kritiikkeihin lukeutuvat väitteet, että (1) kulttuurin muutostiheys on liian korkea evoluution tuloksien kasautumisen mahdol-listamiseksi, (2) yleistykset koskien sisältöjä ovat kestämättömiä tehtyjen yliyksin…
Parallel global optimization : structuring populations in differential evolution
2010
A Multiple Surrogate Assisted Decomposition Based Evolutionary Algorithm for Expensive Multi/Many-Objective Optimization
2019
Many-objective optimization problems (MaOPs) contain four or more conflicting objectives to be optimized. A number of efficient decomposition-based evolutionary algorithms have been developed in the recent years to solve them. However, computationally expensive MaOPs have been scarcely investigated. Typically, surrogate-assisted methods have been used in the literature to tackle computationally expensive problems, but such studies have largely focused on problems with 1–3 objectives. In this paper, we present an approach called hybrid surrogate-assisted many-objective evolutionary algorithm to solve computationally expensive MaOPs. The key features of the approach include: 1) the use of mul…
Variation in developmental mode and its effects on divergence and maintenance of populations
2012
Calibration of the bone mineral density scale on X-ray microtomography
2016
Kirjallisuuden särkyneet mielet
2021
Arvio teoksesta Ovaska, Anna. Fictions of Madness. Shattering Minds and Worlds in Modernist Finnish Literature. Helsingin yliopisto. 2020. 300 s. ISBN 978-951-51-5743-0. nonPeerReviewed