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Atriði 1697-1716 af 2358
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(Royal Society of Chemistry (RSC), 2018)A new 1.2 Å crystal structure of vanadium nitrogenase, isolated under turnover conditions, recently revealed a light atom ligand (OH or NH) replacing the bridging S2B sulfide of the FeV cofactor. QM/MM calculations on the new structure now reveal the ... -
(American Chemical Society (ACS), 2017-10-20)Nitrogenase is one of the most fascinating enzymes in nature, being responsible for all biological nitrogen reduction. Despite decades of research, it is among the enzymes in bioinorganic chemistry whose mechanism is the most poorly understood. The ...
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(University of Iceland, School of Education, Faculty of Education and Pedagogy, 2023-01)The doctoral research project underpinning this dissertation was aimed at developing a deeper understanding of cognitive activation in mathematics teaching in Iceland and in a Nordic context through classroom video observations and student perceptions. ...
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(Wiley, 2020-05-11)Purpose: Exposure definitions vary across pharmacoepidemiological studies. Therefore, transparent reporting of exposure definitions is important for interpretation of published study results. We aimed to assess the quality of reporting of exposure to ...
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(American Geophysical Union (AGU), 2023-01-13)The considerable effects that wind can have on estimates of mass eruption rates (MERs) in explosive eruptions based on volcanic plume height are well known but difficult to quantify rigorously. Many explicitly wind-affected plume models have the ...
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(Springer Science and Business Media LLC, 2020-03-05)Osteoarthritis is an increasingly important health problem for which the main treatment remains joint replacement. Therapy developments have been hampered by a lack of biomarkers that can reliably predict disease, while 2D radiographs interpreted by ...
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(Proceedings of the National Academy of Sciences, 2017-12-21)Do human societies from around the world exhibit similarities in the way that they are structured, and show commonalities in the ways that they have evolved? These are long-standing questions that have proven difficult to answer. To test between competing ...
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(Royal Society of Chemistry (RSC), 2017)We introduce a fully stand-alone version of the Quantum Chemistry Electron Ionization Mass Spectra (QCEIMS) program [S. Grimme, Angew. Chem. Int. Ed., 2013, 52, 6306] allowing efficient simulations for molecules composed of elements with atomic numbers ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2017-12)Nanomagnetic systems and transitions between magnetic states are currently an active topic of research. Spintronics is, in particular, a new branch of science and technology where spin degrees of freedom and spin currents are used in an analogous way ...
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(American Chemical Society (ACS), 2020-08-05)The nitrogenase enzymes are responsible for all biological nitrogen reduction. How this is accomplished at the atomic level, however, has still not been established. The molybdenum-dependent nitrogenase has been extensively studied and is the most ...
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(American Physical Society (APS), 2018-04-26)We developed the theory of electronic properties of semiconductor quantum rings with the Rashba spin-orbit interaction irradiated by an off-resonant high-frequency electromagnetic field (dressing field). Within the Floquet theory of periodically driven ...
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(University of Iceland, School of Social Sciences, Faculty of Sociology, Anthropology and Folkloristics, 2024-03)This doctoral research examines three distinct but interconnected groups of queer migrations to Iceland, that is, individuals coming from the Global South, from Central and Eastern Europe and from the Global North. The general aim of the project is ...
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(Springer Science and Business Media LLC, 2019-08-01)A macroscopic version of Einstein-Podolsky-Rosen entanglement is obtained by quenching a quadratic coupling between two O(N) vector models. A quench of the mixed vacuum produces an excited entangled state, reminiscent of purified thermal equilibrium, ...
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(University of Iceland, School of Humanities, Faculty of History and Philosophy, 2020-05)Innovations introduced in connection with the New Enterprises in Iceland in the second half of the 18th century have long been considered largely unsuccessful, but a more detailed analysis of the reception of particular innovations has been lacking. ...
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(2015)Abstract This paper investigates the importance for pupils’ learning of being generally visibly active participant in a classroom discussion. A class of six year-old pupils was taught about the human skeletal system and other organs. To determine ...
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(Stofnun Vigdísar Finnbogadóttur í erlendum tungumálum, 2016)Orð af norrænum uppruna, einkum orð sem lúta að skipasmíði og siglingum, voru á sínum tíma tekin upp í normandísku þaðan sem þau bárust inn í frönsku sem miðlaði þeim aftur á móti til annara rómanskra tungumála, til að mynda spænsku. Má hér nefna ...
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(Elsevier BV, 2019-12)The transport properties of a wire-dot system coupled to a quantized single photon with linear polarization in a 3D-cavity is theoretically studied using a quantum master equation. The system is also coupled to a photon reservoir, environment. We ...
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(Cambridge University Press (CUP), 2020-03-11)Since the mid-1970s radio-echo soundings have been conducted on Iceland's temperate glaciers. Since then, low-frequency radar technology has furthered the study of most of the island's ice caps. Their masses and volumes have been quantified and detailed ...
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(Menntavísindastofnun, Menntavísindasvið, Háskóli Íslands, 2020-03-19)Í þessari grein er fjallað um samstarfsrannsókn sem fram fór í einum leikskóla á höfuðborgarsvæðinu. Þátttakendur í leikskólanum voru fimm ásamt meistaranema og kennara frá Menntavísindaviði Háskóla Íslands. Rannsóknin er hluti af samstarfsverkefni ...
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(Frontiers Media SA, 2014-04-10)Consistent financial reward of particular features influences the allocation of visual attention in many ways. More surprising are 1-trial reward priming effects on attention where reward schedules are random and reward on one trial influences attentional ...
Atriði 1697-1716 af 2358