Opin vísindi
Opin vísindi er varðveislusafn vísindaefnis og doktorsritgerða í opnum aðgangi á vegum íslenskra háskóla og Landsbókasafns Íslands - Háskólabókasafns.
Opinn aðgangur að rannsóknaniðurstöðum er í samræmi við 10. gr. laga nr. 3/2003 um opinberan stuðning við vísindarannsóknir sem og kröfur innlendra og erlendra rannsóknasjóða. Markmiðið með opnum aðgangi er að niðurstöður rannsókna séu aðgengilegar sem flestum óhindrað og án endurgjalds á rafrænu formi. Vistun í varðveislusafninu er varanleg og ætlað að tryggja aðgang að vísindaefni íslenskra háskóla í opnum aðgangi um ókomna tíð. Varðveislusafnið Opin vísindi er tengt við rannsóknagáttina IRIS og rannsóknaniðurstöður í opnum aðgangi sem eru skráðar í IRIS eru um leið vistaðar og gerðar aðgengilegar til framtíðar í varðveislusafninu. Með því að safna þessu efni saman í eitt safn verður aðgangur að því einfaldur og þægilegur fyrir alla sem vilja kynna sér það og geta þannig notið þess öfluga vísindastarfs sem fram fer í háskólum landsins.
Varðveislusafnið er OpenAIRE / OpenAIREplus samhæft og samrýmist kröfum sem gerðar eru um birtingu rannsóknaniðurstaðna úr verkefnum sem styrkt eru úr evrópsku rannsóknaáætlununum FP7 og H2020.
Varðveislusafnið notar opna hugbúnaðinn DSpace.
Opinn aðgangur að rannsóknaniðurstöðum er í samræmi við 10. gr. laga nr. 3/2003 um opinberan stuðning við vísindarannsóknir sem og kröfur innlendra og erlendra rannsóknasjóða. Markmiðið með opnum aðgangi er að niðurstöður rannsókna séu aðgengilegar sem flestum óhindrað og án endurgjalds á rafrænu formi. Vistun í varðveislusafninu er varanleg og ætlað að tryggja aðgang að vísindaefni íslenskra háskóla í opnum aðgangi um ókomna tíð. Varðveislusafnið Opin vísindi er tengt við rannsóknagáttina IRIS og rannsóknaniðurstöður í opnum aðgangi sem eru skráðar í IRIS eru um leið vistaðar og gerðar aðgengilegar til framtíðar í varðveislusafninu. Með því að safna þessu efni saman í eitt safn verður aðgangur að því einfaldur og þægilegur fyrir alla sem vilja kynna sér það og geta þannig notið þess öfluga vísindastarfs sem fram fer í háskólum landsins.
Varðveislusafnið er OpenAIRE / OpenAIREplus samhæft og samrýmist kröfum sem gerðar eru um birtingu rannsóknaniðurstaðna úr verkefnum sem styrkt eru úr evrópsku rannsóknaáætlununum FP7 og H2020.
Varðveislusafnið notar opna hugbúnaðinn DSpace.
Nýlega bætt við
What can be approximated locally? Case study : Dominating sets in planar graphs
(2008) Lenzen, Christoph; Oswald, Yvonne Anne; Wattenhofer, Roger; Department of Computer Science
Whether local algorithms can compute constant approximations of NP-hard problems is of both practical and theoretical interest. So far, no algorithms achieving this goal are known, as either the approximation ratio or the running time exceed O(l), or the nodes are provided with non-trivial additional information. In this paper, we present the first distributed algorithm approximating a minimum dominating set on a planar graph within a constant factor in constant time. Moreover, the nodes do not need any additional information.
School Phone Bans and Adolescent Mental Health in Iceland
(2026-10-01) Bonilla Aparicio, Elena; Sigmarsdottir, Berglind; Haskell, Erin; Sirotina, Ulyana; Sveinbjornsdottir, Berglind; Asgeirsdottir, Bryndis Bjork; Valdimarsdottir, Heiddis Bjork; Odgers, Candice Lynn; Sigfusdottir, Inga Dora; Allegrante, John Philip; Halldorsdottir, Thorhildur; Department of Business and Economics; Department of Psychology
Importance Concerns about adolescent smartphone use and mental health have prompted many schools to implement mobile phone bans, but evidence of their effects remains mixed. Objective To examine whether schoolwide mobile phone bans were associated with changes in mental health and associated social and behavioral outcomes among adolescents in Iceland. Design, Setting, and Participants This repeated cross-sectional study used difference-in-differences analyses of data from 70 schools across 3 waves of the nationwide Youth in Iceland school survey. The surveys were administered to adolescents aged 13 to 15 years in February 2016, February 2018, and November 2023. Analyses were conducted from February 1, 2025, to January 30, 2026. Exposure Schoolwide mobile phone bans prohibiting student phone use during school hours. Between 2018 and 2023, 22 of 70 schools implemented a phone ban. Main Outcomes and Measures Primary outcomes were depressive symptoms, anxiety, hostility, and mental well-being. Secondary outcomes were perceived peer support, screen use (social media use, gaming alone, gaming with friends, and video watching), and bullying (in person and cyberbullying). Results Among 23 938 adolescent observations across the 3 study years, 11 964 (50.0%) were boys; the mean (SD) age was 13.98 (0.82) years. In the postpolicy period from 2018 to 2023, schoolwide mobile phone bans were not associated with meaningful changes in depressive symptoms (β, 0.65 [95% CI, 0.01-1.30]), anxiety (β, 0.21 [95% CI, −0.08 to 0.50]), hostility (β, 0.23 [95% CI, −0.12 to 0.59]), and mental well-being (β, −0.52 [95% CI, −1.08 to 0.03]). Results were similar in gender-stratified analyses and for the secondary outcomes. Sensitivity analyses examining timing of implementation and more stringent phone restriction criteria were consistent with the main findings. Conclusions and Relevance In this repeated cross-sectional study of adolescents in Iceland, schoolwide mobile phone bans were not associated with meaningful changes in adolescent mental health or related social and behavioral outcomes. These findings suggest that school phone bans implemented in isolation may be insufficient to improve adolescent mental health at the population level.
Glucose is dynamically regulated by time of day in humans and Drosophila
(2026-04-16) Malik, Dania M.; Kain, Pinky; Rhoades, Seth D.; Sengupta, Arjun; Zhang, Shirley L.; Barber, Annika; Haynes, Paula; Arnardottir, Erna Sif; Pack, Allan; Kibbey, Richard G.; Sehgal, Amita; Weljie, Aalim M.; Department of Engineering
Biological clocks shape metabolism, but how circadian programs govern nutrient processing is unclear. Here, using human metabolomics and 13C6-glucose tracing in Drosophila, we delineate previously under characterized daily oscillations in glucose-derived metabolic networks, providing a mechanistic framework for a purpose-built isotope-tracing approach. In flies, we reveal a pronounced “rush hour” of glucose utilization early in the light phase, with carbons directed to biosynthetic and energetic pathways. By contrast, a dopamine reuptake-deficient hyperactive mutant (fumin) with elevated metabolic rate shows phase-shifted and amplified metabolic peaks, indicating that altered neural signaling reshapes temporal glucose flux. Neither altered feeding schedules nor short-term fasting disrupt these intrinsic metabolic rhythms, strongly suggesting that circadian timing, rather than nutrient availability, orchestrates temporal homeostasis. By integrating human metabolite profiling with isotope-tracing in flies, we define a conserved temporal architecture of glucose utilization and demonstrate that metabolic flux is dynamically gated across the day. Our findings establish a framework for understanding how circadian misalignment contributes to metabolic dysfunction and disease.
"to be that one other brick in the pillar" : Online Communities, Platforms, and Collective Action in the BTS Industrial Complex
(Association for Computing Machinery, 2026-04-13) Ringland, Kathryn E.; Seetharaman, Bhavani; Her, Jhertau; Tan, Angeleen; Larsen, Bjarke Alexander; Mendoza, Lance; Carstensdottir, Elin; Oliver, Nuria; Shamma, David A.; Candello, Heloisa; Cesar, Pablo; Lopes, Pedro; Bozzon, Alessandro; Kosch, Thomas; Liao, Vera; Ma, Xiaojuan; Artizzu, Valentino; Draxler, Fiona; Lopez, Gustavo; Reinschluessel, Anke V.; Tong, Xin; Toups Dugas, Phoebe O.; Department of Computer Science
Social media platforms have become integral to everyday life and serve as the foundation for online communities. These platforms not only enable communication but also shape the ways in which online communities are formed and maintained. In this paper, we examine an online community, the BTS fandom ARMY, using Durkheim's concept of solidarity, we show how ARMY's symbolic commitments, collective labor, and boundary negotiations are simultaneously community practices and infrastructural labor that generate cultural and economic value. Using an online survey and ethnographic observations of BTS ARMY, we present the BTS Industrial Complex, an ecosystem of communities all related to BTS that rely on digital platforms to influence and interact with each other. Our contributions are threefold: (1) a conceptualization of the BTS Industrial Complex as a sociotechnical ecosystem, (2) empirical insights into how platforms shape collective action, and (3) implications for HCI in designing for and critically examining large-scale cultural economies.
Effects of nutrition on exercise induced muscle damage in male and female contact sports: A systematic review
(2026-03) Lucas, Felicity; Iatridi, Vasiliki; Costello, Rianne; Graham, Catherine Anna-Marie; Curtis, Christopher; Delextrat, Anne; Department of Sport Science
Flokkar í Opnum vísindum
Veldu flokk til að skoða.
- University of Iceland
- University of Akureyri
- Bifröst University
- Hólar University College
- IRIS
- Agricultural University of Iceland
- National and University Library of Iceland
- Iceland University of the Arts