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Browsing Háskólinn í Reykjavík by School "Verkfræði- og náttúruvísindasvið (HÍ)"

Browsing Háskólinn í Reykjavík by School "Verkfræði- og náttúruvísindasvið (HÍ)"

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    15q11.2 CNV affects cognitive, structural and functional correlates of dyslexia and dyscalculia 
    Ulfarsson, Magnus; Walters, G B; Gústafsson, O; Steinberg, S; Silva, A; Doyle, O M; Brammer, M; Gudbjartsson, Daniel; Arnarsdóttir, S; Jonsdottir, Gudbjorg; Gísladóttir, R S; Bjornsdottir, Gyda; Helgason, H; Ellingsen, L M; Halldórsson, J G; Sæmundsen, Evald E.; Stefánsdóttir, B; Jónsson, L; Eiríksdóttir, V K; Eiríksdóttir, G R; Jóhannesdóttir, G H; Unnsteinsdóttir, U; Jónsdóttir, B; Magnúsdóttir, B B; sulem, patrick; Þorsteinsdóttir, Unnur; Sigurðsson, E; Brandeis, D; Meyer-Lindenberg, A; Stefánsson, H; Stefansson, Kari (Springer Nature, 2017-04-25)
    Several copy number variants have been associated with neuropsychiatric disorders and these variants have been shown to also influence cognitive abilities in carriers unaffected by psychiatric disorders. Previously, we associated the 15q11.2(BP1–BP2) ...
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    Assessing relative permeabilities in geothermal reservoirs using theoretical relations, laboratory measurements and field data 
    Guðjónsdóttir, María Sigríður (2016-01)
    Liquid dominated reservoirs are a common type of hydrothermal reservoirs. They consist of fractured rock and reservoir fluid which may obey Darcy’s law. Steam can form in such reservoirs either through heat input which causes temperature increase or ...
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    Coexisting spin and Rabi oscillations at intermediate time regimes in electron transport through a photon cavity 
    Gudmundsson, Vidar; Gestsson, Hallmann; Abdullah, Nzar; Tang, Chi-Shung; Manolescu, Andrei; Moldoveanu, Valeriu (2019-03-01)
    In this work, we theoretically model the time-dependent transport through an asymmetric double quantum dot etched in a two-dimensional wire embedded in a far-infrared (FIR) photon cavity. For the transient and the intermediate time regimes, the current ...
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    Conductance oscillations of core-shell nanowires in transversal magnetic fields 
    Gudmundsson, Vidar; Manolescu, Andrei; Nemnes, George Alexandru; Sitek, Anna; Erlingsson, Sigurður Ingi; Rosdahl, Tómas (American Physical Society (APS), 2016-05-31)
    We analyze theoretically electronic transport through a core-shell nanowire in the presence of a transversal magnetic field. We calculate the conductance for a variable coupling between the nanowire and the attached leads and show how the snaking ...
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    Eighty-eight variants highlight the role of T cell regulation and airway remodeling in asthma pathogenesis 
    Ólafsdóttir, Þórunn Ásta; Theódórs, Fannar; Bjarnadóttir, Kristbjörg; Björnsdóttir, Unnur Steina; Agustsdottir, Arna B.; Stefánsson, Ólafur A.; Ivarsdottir, Erna; Sigurðsson, Jón K.; Benónísdóttir, Stefanía; Eyjólfsson, Guðmundur I.; Gíslason, Davíð; Gislason, Thorarinn; Guðmundsdóttir, Steinunn; Gylfason, Arnaldur; Halldórsson, Bjarni; Halldorsson, Gisli; Júlíusdóttir, Þórhildur; Kristinsdottir, Anna M.; Lúðvíksdóttir, Dóra; Ludviksson, Bjorn; Másson, Gísli; Norland, Kristjan; Onundarson, Pall; Olafsson, Isleifur; Sigurdardottir, Olof; Stefánsdóttir, Lilja; Sveinbjörnsson, Garðar; Tragante do O, Vinicius; Gudbjartsson, Daniel; Þorleifsson, Guðmar; sulem, patrick; Thorsteinsdottir, Unnur; Norddahl, Guðmundur L.; Jonsdottir, Ingileif; Stefansson, Kari (Springer Science and Business Media LLC, 2020-01-20)
    Asthma is one of the most common chronic diseases affecting both children and adults. We report a genome-wide association meta-analysis of 69,189 cases and 702,199 controls from Iceland and UK biobank. We find 88 asthma risk variants at 56 loci, 19 ...
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    Enumerations of Permutations Simultaneously Avoiding a Vincular and a Covincular Pattern of Length 3 
    Bean, Christian; Claesson, Anders; Úlfarsson, Henning Arnór (University of Waterloo, 2017)
    Vincular and covincular patterns are generalizations of classical patterns allowing restrictions on the indices and values of the occurrences in a permutation. In this paper we study the integer sequences arising as the enumerations of permutations ...
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    Excitons in core-shell nanowires with polygonal cross sections 
    Sitek, Anna; Urbaneja Torres, Miguel; Torfason, Kristinn; Gudmundsson, Vidar; Bertoni, Andrea; Manolescu, Andrei (American Chemical Society, 2018-04-21)
    The distinctive prismatic geometry of semiconductor core-shell nanowires leads to complex localization patterns of carriers. Here, we describe the formation of optically active in-gap excitonic states induced by the interplay between localization of ...
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    Fabrication and characterization of Si1−xGex nanocrystals in as-grown and annealed structures: a comparative study 
    Sultan, Muhammad Taha; Maraloiu, Adrian Valentin; Stavarache, Ionel; Gudmundsson, Jon Tomas; Manolescu, Andrei; Teodorescu, Valentin Serban; Ciurea, Magdalena Lidia; Svavarsson, Halldor (Beilstein Institut, 2019-09-17)
    Multilayer structures comprising of SiO2/SiGe/SiO2 and containing SiGe nanoparticles were obtained by depositing SiO2 layers using reactive direct current magnetron sputtering (dcMS), whereas, Si and Ge were co-sputtered using dcMS and high-power impulse ...
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    Genome-wide association identifies seven loci for pelvic organ prolapse in Iceland and the UK Biobank 
    Ólafsdóttir, Thorhildur; Thorleifsson, Gudmar; sulem, patrick; Stefánsson, Ólafur A.; Medek, Helga; Olafsson, Karl; Ingþórsson, Orri; Guðmundsson, Valur; Jonsdottir, Ingileif; Halldorsson, Gisli; Kristjansson, Ragnar; Frigge, Michael L.; Stefánsdóttir, Lilja; Sigurðsson, Jón K.; Oddsson, Asmundur; Sigurðsson, Ásgeir; Eggertsson, Hannes P.; Melsted, Páll; Halldórsson, Bjarni; Lund, Sigrún Helga; Styrkarsdottir, Unnur; Steinthorsdottir, Valgerdur; Gudmundsson, Julius; Holm, Hilma; Tragante do O, Vinicius; Asselbergs, Folkert; Thorsteinsdottir, Unnur; Gudbjartsson, Daniel; Jónsdóttir, Kristín; Rafnar, Thorunn; Stefansson, Kari (Springer Science and Business Media LLC, 2020-03-17)
    Pelvic organ prolapse (POP) is a downward descent of one or more of the pelvic organs, resulting in a protrusion of the vaginal wall and/or uterus. We performed a genome-wide association study of POP using data from Iceland and the UK Biobank, a total ...
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    GraphTyper2 enables population-scale genotyping of structural variation using pangenome graphs 
    Eggertsson, Hannes; Kristmundsdóttir, Snædís; Beyter, Doruk; Jónsson, Hákon; Skúladóttir, Ástrós; Hardarson, Marteinn; Gudbjartsson, Daniel; Stefansson, Kari; Halldórsson, Bjarni; Melsted, Páll (Springer Science and Business Media LLC, 2019-11-27)
    Analysis of sequence diversity in the human genome is fundamental for genetic studies. Structural variants (SVs) are frequently omitted in sequence analysis studies, although each has a relatively large impact on the genome. Here, we present GraphTyper2, ...
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    In-gap corner states in core-shell polygonal quantum rings 
    Sitek, Anna; Ţolea, Mugurel; Niţă, Marian; Serra, Llorenç; Gudmundsson, Vidar; Manolescu, Andrei (Springer Nature, 2017-01-10)
    We study Coulomb interacting electrons confined in polygonal quantum rings. We focus on the interplay of localization at the polygon corners and Coulomb repulsion. Remarkably, the Coulomb repulsion allows the formation of in-gap states, i.e., ...
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    Macroeconomic effects of fiscal incentives to promote electric vehicles in Iceland: Implications for government and consumer costs 
    Shafiei, Ehsan; Davidsdottir, Brynhildur; Fazeli, Reza; Leaver, Jonathan; Stefansson, Hlynur; Asgeirsson, Eyjolfur Ingi (Elsevier BV, 2018-03)
    Iceland as an island country with abundant renewable energy resources has been totally dependent on imported petroleum fuels to meet its transport fuel demand. Transition to electric vehicles (EVs) is of particular interest for Iceland as electricity ...
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    The photocurrent generated by photon replica states of an off-resonantly coupled dot-cavity system 
    Abdullah, Nzar; Tang, Chi-Shung; Manolescu, Andrei; Gudmundsson, Vidar (Springer Science and Business Media LLC, 2019-10-11)
    Transport properties of a quantum dot coupled to a photon cavity are investigated using a quantum master equation in the steady-state regime. In the off-resonance regime, when the photon energy is smaller than the energy spacing between the lowest ...
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    A probabilistic geologic model of the Krafla geothermal system constrained by gravimetric data 
    Scott, Samuel; Covell, Cari; Júlíusson, Egill; Valfells, Agust; Newson, Juliet; Hrafnkelsson, Birgir; Pálsson, Halldór; Gudjónsdóttir, María (Springer Science and Business Media LLC, 2019-09-24)
    The quantitative connections between subsurface geologic structure and measured geophysical data allow 3D geologic models to be tested against measurements and geophysical anomalies to be interpreted in terms of geologic structure. Using a Bayesian ...
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    Sequence variants associating with urinary biomarkers 
    Benonisdottir, Stefania; Kristjansson, Ragnar P; Oddsson, Asmundur; Steinthorsdottir, Valgerdur; Mikaelsdottir, Evgenia; Kehr, Birte; Jensson, Brynjar O; Arnadottir, Gudny A; Sulem, Gerald; Sveinbjornsson, Gardar; Kristmundsdóttir, Snædís; Ívarsdóttir, Erna V.; Tragante, Vinicius; Gunnarsson, Bjarni; Runolfsdottir, Hrafnhildur Linnet; Arthur, Joseph G; Deaton, Aimee M; Eyjolfsson, Gudmundur I; Davidsson, Olafur B; Asselbergs, Folkert W; Hreidarsson, Astradur B; Rafnar, Thorunn; Thorleifsson, Gudmar; Edvardsson, Vidar; Sigurdsson, Gunnar; Helgadottir, Anna; Halldórsson, Bjarni; Masson, Gisli; Holm, Hilma; Önundarson, Páll Torfi; Indridason, Olafur S; Benediktsson, Rafn; Palsson, Runolfur; Gudbjartsson, Daniel F; Olafsson, Isleifur; Thorsteinsdottir, Unnur; sulem, patrick; Stefansson, Kari (Oxford University Press (OUP), 2018-11-24)
    Urine dipstick tests are widely used in routine medical care to diagnose kidney and urinary tract and metabolic diseases. Several environmental factors are known to affect the test results, whereas the effects of genetic diversity are largely unknown. ...
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    Simulation-based appraisal of tax-induced electro-mobility promotion in Iceland and prospects for energy-economic development 
    Shafiei, Ehsan; Davidsdottir, Brynhildur; Stefansson, Hlynur; Asgeirsson, Eyjolfur Ingi; Fazeli, Reza; Gestsson, Marías Halldór; Leaver, Jonathan (Elsevier BV, 2019-10)
    Transition to electric vehicles (EVs) requires multidimensional policy measures incorporating vehicle fleets, energy systems, consumer behaviours, and socio-economic developments. The main objective of this paper is to evaluate the implications of a ...
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    Tailoring microstructure and stress through energetic ion bombardment: A molecular dynamic simulation 
    Kateb, Movaffaq; Gudmundsson, Jon Tomas; Ingvarsson, Snorri (2020)
    We studied high power impulse magnetron sputtering (HiPIMS) and different substrate bias for the epitaxial growth of Cu film on Cu (111) substrate by molecular dynamics simulation. We assumed a fully ionized deposition flux to represent the high ...
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    Thermoelectric Inversion in a Resonant Quantum Dot-Cavity System in the Steady-State Regime 
    Abdullah, Nzar; Tang, Chi-Shung; Manolescu, Andrei; Gudmundsson, Vidar (MDPI AG, 2019-05-14)
    We theoretically investigate thermoelectric effects in a quantum dot system under the influence of a linearly polarized photon field confined to a 3D cavity. A temperature gradient is applied to the system via two electron reservoirs that are connected ...
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    Variants associating with uterine leiomyoma highlight genetic background shared by various cancers and hormone-related traits 
    Rafnar, Thorunn; Bjarni Gunnarsson; Ólafur A. Stefánsson; sulem, patrick; Ingason, Andrés; Frigge, Michael L.; Lilja Stefánsdóttir; Jón K. Sigurðsson; Tragante, Vinicius; Steinthorsdottir, Valgerdur; Styrkarsdottir, Unnur; Stacey, Simon N.; Gudmundsson, Julius; Arnadottir, Gudny; Oddsson, Asmundur; Zink, Florian; Halldorsson, Gisli; Sveinbjornsson, Gardar; Kristjansson, Ragnar; Ólafur B. Davíðsson; Anna Þórhildur Salvarsdóttir; Ásgeir Thoroddsen; Elísabet A. Helgadottir; Katrín Kristjánsdóttir; Orri Ingþórsson; Valur Guðmundsson; Geirsson, Reynir T.; Ragnheiður Árnadottir; Gudbjartsson, Daniel; Másson, Gísli; Asselbergs, Folkert W.; Jón Gunnlaugur Jónasson; Karl Ólafsson; Thorsteinsdottir, Unnur; Halldórsson, Bjarni; Thorleifsson, Gudmar; Stefansson, Kari (Springer Science and Business Media LLC, 2018-09-07)
    Uterine leiomyomas are common benign tumors of the myometrium. We performed a meta-analysis of two genome-wide association studies of leiomyoma in European women (16,595 cases and 523,330 controls), uncovering 21 variants at 16 loci that associate with ...
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    Whole genome characterization of sequence diversity of 15,220 Icelanders 
    Jónsson, Hákon; sulem, patrick; Kehr, Birte; Kristmundsdóttir, Snædís; Zink, Florian; Hjartarson, Eiríkur; Hardarson, Marteinn; Hjorleifsson, Kristjan; Eggertsson, Hannes; Guðjónsson, Sigurjón Axel; Ward, Lucas D.; Arnadottir, Gudny; Helgason, Einar A.; Helgason, Hannes; Gylfason, Arnaldur; Jónasdóttir, Aðalbjörg; Jónasdóttir, Áslaug; Rafnar, Thorunn; Besenbacher, Soren; Frigge, Michael L.; Stacey, Simon N.; Magnússon, Ólafur T.; Þorsteinsdóttir, Unnur; Másson, Gísli; Kong, Augustine; Halldórsson, Bjarni; Helgason, Agnar; Gudbjartsson, Daniel; Stefansson, Kari (Springer Nature, 2017-09-21)
    Understanding of sequence diversity is the cornerstone of analysis of genetic disorders, population genetics, and evolutionary biology. Here, we present an update of our sequencing set to 15,220 Icelanders who we sequenced to an average genome-wide ...