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
Under Pressure : A Multi-Modal Analysis of Induced Stressors in Games for Resilience
(Association for Computing Machinery, 2023-04-12) Habibi, Reza; Pfau, Johannes; Maram, Sai Siddartha; Li, Jiahong; Larsen, Bjarke; Xu, Jason; Kashani, Atieh; Sisodiya, Shweta; Holmes, Jonattan; Teng, Zhaoqing; Carstensdottir, Elin; El-Nasr, Magy Seif; Lopes, Phil; Luz, Filipe; Liapis, Antonios; Engstrom, Henrik; Department of Computer Science
Emotion regulation and coping strategies are key to resilience, problem solving and eventually well-being in everyday life, but investigating or influencing these without adjustable and ecologically valid environments still poses a major challenge. With respect to video games, stressful events can frequently appear and, depending on the individual's emotion regulation, lead to frustrating experiences, dissatisfied players or even churn - or to a sense of accomplishment, mastery or positive tension. In the greater endeavor of establishing games for studying, controlling and reinforcing resilience, we developed an alternate reality game that unifies the advantages of a fully customizable game environment with the close connection to real-life interactions. To estimate how emotion regulation strategies could be initiated as well as investigated, this work first induces different kinds of established stressors (time pressure, social encounters and being unchangeably stuck) into ordinary gameplay, quantifies the players' physiological and psychological responses and addresses the participants' strategies on dealing with these situations. In this paper we present results of the study showing that the induced stressors were effective in constituting stressful situations comparable to real-life experiences; and each of these conditions resulted in different types of physiological and perceived responses and behaviors, e.g. continuous stress in social encounters versus instantaneous stress when notified about time pressure; or frustrating experiences when being forcibly stuck versus stress that participants underwent but were able to work against. With this platform to study how people cope with stress, instituted within a multi-modal mixed-methods evaluation, we contribute to games beyond entertainment towards educating resilience.
A Wideband Reflectarray Antenna for Satellite Application with Low Cross-Polarization
(2023-04) Elahi, Manzoor; Jeong, Taeyong; Yang, Youngoo; Lee, Kang Yoon; Hwang, Keum Cheol; Department of Engineering
A double-layer element consisting of a spider-shaped structure on the top layer and a pair of concave arms with a circular ring on the middle layer is proposed for the wideband reflectarray with low cross-polarization characteristics. The unit cell offers a linear and wider phase range of 800 (Formula presented.). Based on the proposed unit cell, an offset-fed reflectarray with an octagonal aperture comprising 6769 unit cells is constructed at 11.725 GHz. The reflectarray offers 1 dB and 3 dB gain bandwidths of 25.2% and 32.3%, respectively, with an operating frequency range of 10–13.85 GHz. A peak gain of 31.2 dBi with an aperture efficiency of 42% is achieved. The cross-polarization levels are less than the co-polarization by 40 dB over the entire operating band.
Integration Pressure-Retarded Osmosis with Direct Air Capture Process for Electricity Production and Decarbonization: Fouling Behavior and Life Cycle Assessment
(University of Iceland, School of Engineering and Natural Sciences, Faculty of Civil and Environmental Engineering, 2026-11) Guan, Lingxue; Bing Wu; Faculty of Civil and Environmental Engineering (UI); Umhverfis- og byggingarverkfræðideild (HÍ); School of Engineering and Natural Sciences (UI); Verkfræði- og náttúruvísindasvið (HÍ)
Direct air capture (DAC) is a promising approach for carbon dioxide removal, but its substantial energy demand remains a challenge for sustainable implementation. This research investigated the feasibility of integrating pressure retarded osmosis (PRO) with aqueous hydroxide-based DAC to recover energy from high-salinity DAC process streams, focusing on membrane fouling, fouling mitigation, and environmental performance. PRO performance was evaluated under CaCO3 scaling and combined CaCO3-alginate fouling using simulated CO2-captured solutions as draw solutions. The results highlighted that (1) CaCO3 polymorph composition influenced scaling behavior, with amorphous calcium carbonate (ACC) forming denser cake layers that restricted water transport, while calcite formed more porous cake layer that restricted water transport less; (2) in both NaHCO3- based (pH ~7.59) and NaHCO3/Na2CO3-based (pH ~10.5) draw solutions, hydraulic pressure increased alginate deposition, while higher fouling resistance was associated with greater ACC deposition; (3) the CaCO3/alginate ratio influenced foulant deposition patterns: in the NaHCO3-based solution, more alginate in the draw solution faciliated greater deposition of both alginate and CaCO3, while in the NaHCO3/Na2CO3-based solution, alginate deposition was inversely related to CaCO3 deposition. Nevertheless, ACC deposition remained positively associated with fouling resistance at both pH levels; and (4) periodic water flushing removed ~88-99% of deposited CaCO3 and substantially recovered membrane performance, although most organic foulants remained. Comparative life cycle assessment showed ~0.82 ton CO2-eq net removal per ton of CO2 captured in the hybrid DAC-PRO process, comparable to renewable energy-driven DAC under Icelandic scenario. Overall, the findings demonstrate the technical and environmental feasibility of the proposed DAC-PRO process.
A pragmatic strength and conditioning intervention for firefighters : Feasibility of the Tactical Athlete Resilience Program (TARP)
(2023-02) Sharp, Paul; Caperchione, Cristina M.; Brown, Georgia A.; Stadnyk, Antony; Marin, Elizabeth; Hulin, Billy; Wade, Jarrod; Mott, Brendan; Gabriel, Mark; Impellizzeri, Franco; Fullagar, Hugh H.K.; Department of Sport Science
Issue Addressed: Firefighting is physically and mentally taxing and recruits are expected to have optimal health and fitness. However, physical fitness tends to decline following initial training, placing firefighters at an increased risk for stress and injury. Efforts are needed to engage and support firefighters in maintaining adequate health and fitness to withstand the rigorous demands of their occupation. This study examined the feasibility of TARP, a pragmatic strength and conditioning intervention for metropolitan-based firefighters, delivered in collaboration with a professional National Rugby League club. Methods: A mixed-methods approach was utilised to examine program implementation, recruitment and sample characteristics, intervention satisfaction and acceptability, and participants' response to the intervention. Evaluation measures included field notes taken during steering committee meetings, participant flow data, baseline and follow-up outcome measures, self-report questionnaires, and telephone interviews with a sample of participants. Results: Participants (N = 113) were predominantly men (82%) with a mean age of 43 ± 9.3 years and BMI of 26.6 ± 2.9 kg/m2. Program satisfaction was high (95% very satisfied or somewhat satisfied) among program completers (42% retention). Key strengths of the program included delivery through the professional sports club, quality of facilities and equipment, and scheduling flexibility. Future programs should consider incorporating education or training to support behaviour change maintenance and strategies to retain participants at follow-up. Conclusions: Results provide valuable insights into the design and delivery of interventions for firefighters and demonstrate the importance of strong partnerships between community stakeholders.
Comparing Interactive Retrieval Approaches at the Lifelog Search Challenge 2021
(2023) Tran, Ly Duyen; Nguyen, Manh Duy; Dang-Nguyen, Duc Tien; Heller, Silvan; Spiess, Florian; Lokoc, Jakub; Peska, Ladislav; Nguyen, Thao Nhu; Khan, Omar Shahbaz; Duane, Aaron; Jónsson, Björn Þór; Rossetto, Luca; Yen, An Zi; Alateeq, Ahmed; Alam, Naushad; Tran, Minh Triet; Healy, Graham; Schoeffmann, Klaus; Gurrin, Cathal; Department of Computer Science
The Lifelog Search Challenge (LSC) is an interactive benchmarking evaluation workshop for lifelog retrieval systems. The challenge was first organised in 2018 aiming to find the system that can quickly retrieve relevant lifelog images for a given semantic query. This paper provides an analysis of the performance of all 17 systems participating in the 4th LSC workshop held at the 2021 Annual ACM International Conference on Multimedia Retrieval (ICMR). LSC'21 was the largest effort at comparing different approaches to interactive lifelog retrieval systems seen thus far. Findings from the challenge suggest that many different interactive factors contribute to the success (or otherwise) of participating teams. In this paper, we provide an overview of the LSC'21 challenge, introduce each team's approach and explore these factors in depth and offer clues on how to develop a high-performing interactive lifelog search engine.
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