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Doktorsritgerðir- HÍ: Síðast bætt við
Atriði 321-340 af 550
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(University of Iceland, School of Education, Faculty of Health Promotion, Sport and Leisure Studies, 2018-04)Background: Very little is known about physical activity (PA) and PA patterns measured with objective methods among children with intellectual disability (ID) or their reasons to take part in PA and sport. Moreover, even less is known about their ... -
(Háskóli Íslands, Menntavísindasvið, 2020-05)Background Sleep and physical activity are essential functions of human health. According to International recommendations, adolescents should sleep 8-10 hours each night and engage in moderate to vigorous physical activity for at least 60 minutes ...
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(Aalto University, 2021-03-05)This dissertation discusses the implications of municipal energy-related actions in the generation of low carbon and carbon neutral cities. The purpose of the study is to examine the implications of these actions within the boundaries of scope 2 - 3 ...
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(University of Iceland, School of Humanities, Faculty of History and Philosophy, 2021-03)Volcanic eruptions can cause significant human health and environmental threats both during and after their event due to the hazardous materials and gases that are actively or passively released into the surrounding environment. Historical records ...
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(Háskóli Íslands, Hugvísindasvið, Sagnfræði- og heimspekideild, 2021)Á árunum 1874–1915 tók íslenskt samfélag margháttuðum breytingum sem birtust m.a. í efnahags- og félagslegum umskiptum sem tengdust þéttbýlismyndun og lýðræðisþróun. Íslenska sveita-samfélagið átti undir högg að sækja eftir að hafa verið allsráðandi ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2021-02)Phosphorus is an essential yet irreplaceable macronutrient for agriculture and thus plays a key role in global food security. Most of the phosphate fertilizers are produced from phosphate rock, a finite mineral resource that is mined and processed at ...
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(University of Iceland, School of Social Science, Faculty of Business Administration, 2021-02-17)In 1990, Iceland introduced a uniform individual transferable quota system (ITQ) to manage almost all of the nation’s fisheries. The development of Iceland’s fisheries under this management system were examined in the five articles this thesis consists ...
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(University of Iceland, School of Health Sciences, Faculty of Medicine, 2021)Markmið: Að kanna áhættuþætti fyrir fæðingu mikilla þungbura (fæðingarþyngd ≥5000 g) og hugsanlegar afleiðingar þess fyrir móður og barn (grein 1). Að meta efnaskipti mikilla þungbura með því að skoða mynstur þeirra amínósýra og acylkarnitína sem mæld ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Life and Environmental Sciences, 2021-01-28)The geo-political importance of the Arctic is growing while at the same time the onset of climate change has resulted in increasing environmental and social pressures both on Arctic states and the governance architecture through which Arctic issues ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2021-02)The physico-chemical properties of magma storage reservoirs in multi-level magmatic systems may change with time, along with the timescales at which crystals and melts are processed throughout the crust. In this thesis, I use an integrated approach ...
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(University of Iceland, School of Humanities, Faculty of Languages and Cultures, 2021-01)Spanish author C. Martín Gaite developed a number of theories on communication and the interlocutor in her essays and articles, that she put in practice in her narrative work through author-reader and characters communicative interaction. This study ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2021-01)The extent of compositional and lithological heterogeneity in Earth’s convecting mantle, caused by the recycling of oceanic and continental lithosphere, has long been a subject of interest to geochemists and geophysicists. A fundamental outstanding ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Life and Environmental Sciences, 2021-01)The marine ecosystem around Iceland is shaped by its position in one of the most hydrographically complicated regions of the North Atlantic. The response of marine populations to those diverse conditions is expected to be different across taxonomically ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Life and Environmental Sciences, 2021-02)Innate immunity of the lung epithelium provides efficient defenses against pathogens or other stress factors by secretion of antimicrobial peptides, presence of cellular junction proteins and autophagy. Upon activation through epithelial cell receptors ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2020-11)The aim of genome-wide association studies (GWAS) is to identify sequence variants that influence human traits or diseases. Previous GWAS have mostly focused on finding variants that affect the mean of a trait or disease risk under an additive model. ...
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(University of Turku; University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2020-11-13)Tephrochronology is a high-precision dating method that uses volcanic ash horizons as isochrons in correlating and dating geological records and archaeological sites. First developed in the volcanic regions of the world, tephrochronology has expanded ...
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(University of Iceland, school of health sciences, faculty of medicine, 2020-09)Background: Cognitive impairment is a core feature at all stages of the psychotic illness and significantly predicts functional outcomes. Targeting cognition early is theoretically attractive as a means to reverse the functional impairment before ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2020-12-15)Dynamic nuclear polarization (DNP) has emerged as an important technique to enhance the signal intensity of nuclear magnetic resonance (NMR) spectroscopy by transferring spin polarization from unpaired electrons to nuclei of interest. Persistent organic ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Life and Environmental Sciences, 2020-12)Sustainable energy development is a cross-cutting policy objective with the ultimate aim of a sustainable energy future. However, what that future involves and how it can be reached is unclear. The aim of this PhD thesis is to address the question ...
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(University of Iceland, School of Health Sciences, Faculty of Medicine, 2020-12-14)Markmið: Meginmarkmið þessa doktorsverkefnis var að kanna tíðni grindarbotnseinkenna og vanlíðunar sem þau valda frumbyrjum á fyrstu mánuðum eftir fæðingu, ásamt því að rannsaka hvort tengsl findust milli grindarbotnseinkennanna og fæðingartengdra ...
Atriði 321-340 af 550