Háskólinn í Reykjavík: Síðast bætt við

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    Stories vs. facts: triggering emotion and action-taking on climate change 
    Morris, Brandi S.; Chrysochou, Polymeros; Christensen, Jacob Dalgaard; Lund Orquin, Jacob; Barraza, Jorge; Zak, Paul J.; Mitkidis, Panagiotis (Springer Science and Business Media LLC, 2019-04-06)
    Climate change is an issue which elicits low engagement, even among concerned segments of the public. While research suggests that the presentation of factual information (e.g., scientific consensus) can be persuasive to some audiences, there is also ...
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    Variable-Fidelity Simulation Models and Sparse Gradient Updates for Cost-Efficient Optimization of Compact Antenna Input Characteristics 
    Koziel, Slawomir; Pietrenko-Dabrowska, Anna (MDPI AG, 2019-04-15)
    Design of antennas for the Internet of Things (IoT) applications requires taking into account several performance figures, both electrical (e.g., impedance matching) and field (gain, radiation pattern), but also physical constraints, primarily concerning ...
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    Twenty-three unsolved problems in hydrology (UPH) – a community perspective 
    Blöschl, Günter; Bierkens, Marc F.P.; Chambel, Antonio; Cudennec, Christophe; Destouni, Georgia; Fiori, Aldo; Kirchner, James W.; McDonnell, Jeffrey J.; Savenije, Hubert H.G.; Sivapalan, Murugesu; Stumpp, Christine; Toth, Elena; Volpi, Elena; Carr, Gemma; Lupton, Claire; Salinas, Josè; Széles, Borbála; Viglione, Alberto; Aksoy, Hafzullah; Allen, Scott T.; Amin, Anam; Andréassian, Vazken; Arheimer, Berit; Aryal, Santosh K.; Baker, Victor; Bardsley, Earl; Barendrecht, Marlies H.; Bartosova, Alena; Batelaan, Okke; Berghuijs, Wouter R.; Beven, Keith; Blume, Theresa; Bogaard, Thom; Borges de Amorim, Pablo; Böttcher, Michael E.; Boulet, Gilles; Breinl, Korbinian; Brilly, Mitja; Brocca, Luca; Buytaert, Wouter; Castellarin, Attilio; Castelletti, Andrea; Chen, Xiaohong; Chen, Yangbo; Chen, Yuanfang; Chifflard, Peter; Claps, Pierluigi; Clark, Martyn P.; Collins, Adrian L.; Croke, Barry; Dathe, Annette; David, Paula C.; de Barros, Felipe P. J.; de Rooij, Gerrit; Di Baldassarre, Giuliano; Driscoll, Jessica M.; Duethmann, Doris; Dwivedi, Ravindra; Eris, Ebru; Farmer, William H.; Feiccabrino, James; Ferguson, Grant; Ferrari, Ennio; Ferraris, Stefano; Fersch, Benjamin; Finger, David C.; Foglia, Laura; Fowler, Keirnan; Gartsman, Boris; Gascoin, Simon; Gaume, Eric; Gelfan, Alexander; Geris, Josie; Gharari, Shervan; Gleeson, Tom; Glendell, Miriam; Gonzalez Bevacqua, Alena; González-Dugo, María P.; Grimaldi, Salvatore; Gupta, A. B.; Guse, Björn; Han, Dawei; Hannah, David; Harpold, Adrian; Haun, Stefan; Heal, Kate; Helfricht, Kay; Herrnegger, Mathew; Hipsey, Matthew; Hlaváčiková, Hana; Hohmann, Clara; Holko, Ladislav; Hopkinson, Christopher; Hrachowitz, Markus; Illangasekare, Tissa H.; Inam, Azhar; Innocente, Camyla; Istanbulluoglu, Erkan; Jarihani, Ben; Kalantari, Zahra; Kalvans, Andis; Khanal, Sonu; Khatami, Sina; Kiesel, Jens; Kirkby, Mike; Knoben, Wouter; Kochanek, Krzysztof; Kohnová, Silvia; Kolechkina, Alla; Krause, Stefan; Kreamer, David; Kreibich, Heidi; Kunstmann, Harald; Lange, Holger; Liberato, Margarida L. R.; Lindquist, Eric; Link, Timothy; Liu, Junguo; Loucks, Daniel Peter; Luce, Charles; Mahé, Gil; Makarieva, Olga; Malard, Julien; Mashtayeva, Shamshagul; Maskey, Shreedhar; Mas-Pla, Josep; Mavrova-Guirguinova, Maria; Mazzoleni, Maurizio; Mernild, Sebastian; Misstear, Bruce Dudley; Montanari, Alberto; Müller-Thomy, Hannes; Nabizadeh, Alireza; Nardi, Fernando; Neale, Christopher; Nesterova, Nataliia; Nurtaev, Bakhram; Odongo, Vincent O.; Panda, Subhabrata; Pande, Saket; Pang, Zhonghe; Papacharalampous, Georgia; Perrin, Charles; Pfister, Laurent; Pimentel, Rafael; Polo, María J.; Post, David; Prieto Sierra, Cristina; Ramos, Maria-Helena; Renner, Maik; Reynolds, José Eduardo; Ridolfi, Elena; Rigon, Riccardo; Riva, Monica; Robertson, David E.; Rosso, Renzo; Roy, Tirthankar; Sá, João H.M.; Salvadori, Gianfausto; Sandells, Mel; Schaefli, Bettina; Schumann, Andreas; Scolobig, Anna; Seibert, Jan; Servat, Eric; Shafiei, Mojtaba; Sharma, Ashish; Sidibe, Moussa; Sidle, Roy C.; Skaugen, Thomas; Smith, Hugh; Spiessl, Sabine M.; Stein, Lina; Steinsland, Ingelin; Strasser, Ulrich; Su, Bob; Szolgay, Jan; Tarboton, David; Tauro, Flavia; Thirel, Guillaume; Tian, Fuqiang; Tong, Rui; Tussupova, Kamshat; Tyralis, Hristos; Uijlenhoet, Remko; van Beek, Rens; van der Ent, Ruud J.; van der Ploeg, Martine; Van Loon, Anne F.; van Meerveld, Ilja; van Nooijen, Ronald; van Oel, Pieter R.; Vidal, Jean-Philippe; von Freyberg, Jana; Vorogushyn, Sergiy; Wachniew, Przemyslaw; Wade, Andrew J.; Ward, Philip; Westerberg, Ida K.; White, Christopher; Wood, Eric F.; Woods, Ross; Xu, Zongxue; Yilmaz, Koray K.; Zhang, Yongqiang (Informa UK Limited, 2019-07-02)
    This paper is the outcome of a community initiative to identify major unsolved scientific problems in hydrology motivated by a need for stronger harmonisation of research efforts. The procedure involved a public consultation through online media, ...
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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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    Refractometric Sensing with Periodic Nano-Indented Arrays: Effect of Structural Dimensions 
    Carney, Daniel; Svavarsson, Halldor; Hemmati, Hafez; Fannin, Alexander; Yoon, Jae; Magnusson, Robert (MDPI AG, 2019-02-21)
    Fabrication and sensor application of a simple plasmonic structure is described in this paper. The sensor element consists of nano-patterned gold film brought about from two-dimensional periodic photoresist templates created by holographic laser ...
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    Active and Passive Social Media Use and Symptoms of Anxiety and Depressed Mood Among Icelandic Adolescents 
    Thorisdottir, Ingibjorg; Sigurvinsdottir, Rannveig; Asgeirsdottir, Bryndis Bjork; Allegrante, John P.; Sigfusdottir, Inga (Mary Ann Liebert Inc, 2019-08)
    Adolescent use of social media platforms such as Facebook, Instagram, and Snapchat has increased dramatically over the last decade and now pervades their everyday social lives. Active and passive social media use may impact emotional health differently, ...
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    A comparative study of electrolyte concentration-symmetry and gate voltage effects on the heterogenous surface charge in a nanofluidic FET 
    Kateb, Movaffaq; Fathipour, Morteza; Kolahdouz, Mohammadreza (Reykjavik University, 2020)
    The present study aims to investigate utilizing field-effect for inducing heterogeneous surface charge and consequently changing the fluid flow in a solid-state nanochannel with converging-diverging periodicity. It is shown that the combination of ...
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    Social Media Use and Symptoms of Anxiety and Depressed Mood among Adolescents 
    Thorisdottir, Ingibjorg (Háskólinn í Reykjavík, 2020-06)
    Many studies have found a relationship between social media use and symptoms of emotional distress, such as depression and anxiety. However, the existing research lacks longitudinal analyses, a thorough understanding of the possible mechanisms involved ...
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    Commitment to Social Responsibility, Reporting on Social Responsibility, and Social Innovation in For-Profit Businesses 
    Sigurdsson, Dr. Kjartan (2020-06-20)
    Social responsibility has gained momentum as an important topic for academics, practitioners, and policymakers, spurred notably by a growing interest in defining and crossing boundaries between for-profit business activities and stakeholder interests. ...
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    Improving the Efficiency of Pyrolysis and Increasing the Quality of Gas Production through Optimization of Prototype Systems 
    Fogarassy, Csaba; Toth, Laszlo; Czikkely, Marton; Finger, David C. (MDPI AG, 2019-12-15)
    Pyrolysis is a thermochemical process that consists of the degradation of organic polymers and biomass minerals in lignocellulose materials. At low pyrolysis temperature (300-400 degrees C), primarily carbon is produced during the reaction time. Rapid ...
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    Improved distributed algorithms for coloring interval graphs with application to multicoloring trees 
    Halldórsson, Magnús M.; Konrad, Christian (Elsevier BV, 2020-04)
    We give a distributed (1+eps)-approximation algorithm for the minimum vertex coloring problem on interval graphs, which runs in the LOCAL model and operates in O((1/eps) log* n) rounds. If nodes are aware of their interval representations, then the ...
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    Leader election in SINR model with arbitrary power control 
    Halldórsson, Magnús M.; Holzer, Stephan; Markatou, Evangelia Anna; Lynch, Nancy (Elsevier BV, 2020-04)
    We consider the Leader Election Problem in the Signal-to-Interference-plusNoise-Ratio (SINR) model where nodes can adjust their transmission power. We show that in this setting it is possible to elect a leader in two communication rounds, with high ...
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    Geological challenges and geohazard monitoring of a mega engineering hydropower project in Iceland 
    Sigtryggsdóttir, Fjóla G.; Snaebjornsson, Jonas Thor (Elsevier BV, 2019-09)
    Geohazards must be considered, assessed and mitigated for all life-cycle phases of most mega infrastructure projects. This paper presents a unique mega engineering project, the 600 MW Kárahnjúkar Hydropower Project in Iceland. The construction site ...
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    Generalized Master Equation Approach toTime-Dependent Many-Body Transport 
    Moldoveanu, Valeriu; Manolescu, Andrei; Gudmundsson, Vidar (MDPI AG, 2019-07-25)
    We recall theoretical studies on transient transport through interacting mesoscopic systems. It is shown that a generalized master equation (GME) written and solved in terms of many-body states provides the suitable formal framework to capture both the ...
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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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    Gap Prediction in Hybrid Graphene-Hexagonal Boron Nitride Nanoflakes Using Artificial Neural Networks 
    Nemnes, G. A.; Mitran, T. L.; Manolescu, Andrei (Hindawi Limited, 2019-05-16)
    The electronic properties of graphene nanoflakes (GNFs) with embedded hexagonal boron nitride (hBN) domains are investigated by combined ab initio density functional theory calculations and machine-learning techniques. The energy gaps of the quasi-0D ...
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    Preferential activation of small cutaneous fibers through small pin electrode also depends on the shape of a long duration electrical current 
    Hugosdottir, Rosa; Mørch, Carsten Dahl; Andersen, Ole Kæseler; Helgason, Thordur; Arendt-Nielsen, Lars (Springer Science and Business Media LLC, 2019-09-14)
    Background Electrical stimulation is widely used in experimental pain research but it lacks selectivity towards small nociceptive fibers. When using standard surface patch electrodes and rectangular pulses, large fibers are activated at a lower threshold ...
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    Flow distortion recorded by sonic anemometers on a long-span bridge: Towards a better modelling of the dynamic wind load in full-scale 
    Cheynet, Etienne; Jakobsen, Jasna Bogunović; Snaebjornsson, Jonas Thor (Elsevier BV, 2019-06)
    The turbulent wind field around a suspension bridge deck is studied using eleven months of full-scale records from sonic anemometers mounted above the girder. Using the mean and turbulent velocity characteristics, we demonstrate that the bridge structure ...
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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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    Distribution network reconfiguration using feasibility-preserving evolutionary optimization 
    landeros, alberto; Koziel, Slawomir; Abdel-Fattah, Mohamed (Springer Science and Business Media LLC, 2018-12-13)
    Distribution network reconfiguration (DNR) can significantly reduce power losses, improve the voltage profile, and increase the power quality. DNR studies require implementation of power flow analysis and complex optimization procedures capable of ...