| 1. |
- Abrahamsson, Agneta, et al.
(författare)
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Sense of coherence of reindeer herders and other Samis in comparison to other Swedish citizens
- 2013
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Ingår i: International Journal of Circumpolar Health. - : Informa UK Limited. - 1239-9736 .- 2242-3982. ; 72:1, s. Art. no. 20633-
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Tidskriftsartikel (refereegranskat)abstract
- Background. Samis are indigenous people in north Europe. In the territory called Sapmi (Lapland), reindeer herding is the traditional base for the Sami economy. The relation between living conditions and positive health of the Swedish Samis has been sparsely studied. As health is closely linked to sense of coherence (SOC), an understanding of the background factors to SOC may contribute knowledge that might be useful in promoting living conditions and health. Methods. The study examines relations between the level of SOC and background factors from surveys in a Sami population (n = 613) in comparison to a non-Sami population (n = 525) in Sweden, and in comparison between 2 subsamples of Samis, that is, herders and non-herders. Results. There are more similarities than differences between the Sami and non-Sami populations. However, dividing the Sami population, reindeer herders had significantly lower SOC, and in specific the subcomponent manageability, that is, less ability to use available resources to meet different demands in life, compared to non-herders. Conclusions. In addition to age and health, predictors of SOC are related to the life form of reindeer husbandry and the belonging to the herding community.
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| 2. |
- Ahlin, Karin, 1963-, et al.
(författare)
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IoT in Elementary School for Everyone – A Research Plan
- 2022
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Ingår i: Challenges of Trustable AI and Added-Value on Health. - : IOS Press. - 9781643682846 - 9781643682853 ; , s. 955-956
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Konferensbidrag (refereegranskat)abstract
- We propose a tentative research plan to increase students’ mental healthin elementary schools by implementing Internet of Things (IoT) technology. Theresearch plan should answer how to support students’ mental health using IoTsolutions and the critical factors influencing testbeds for IoT solutions with thepreviously mentioned purpose. Our intended research method is Design Science,which we plan to use stepwise.
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| 3. |
- Andersson, P, et al.
(författare)
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Clinical correlates of oral impacts on daily performances.
- 2010
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Ingår i: International journal of dental hygiene. - : Wiley. - 1601-5037 .- 1601-5029. ; 8:3, s. 219-26
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Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to investigate the associations between oral health measures and oral health-related quality of life as captured by OIDP (oral impacts on daily performances).
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| 4. |
- Andersson, Pia, 1955-, et al.
(författare)
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Kvalitetsindikatorer för munhälsa
- 2007
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Ingår i: Idvall, E. (red), Kvalitetsindikatorer inom omvårdnad. - Stockholm : Gothia. - 9789172055193 ; , s. 45-56
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 5. |
- Andersson, Pia, 1955-, et al.
(författare)
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Kvalitetsindikatorer för munhälsa
- 2007
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Ingår i: Kvalitetsindikatorer inom omvårdnad. - Stockholm : Gothia Förlag AB. - 9789172055193 ; , s. 45-56, s. 45-56
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 6. |
- Arvidsson, Åke, et al.
(författare)
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Web metrics for the next generation performance enhancing proxies
- 2019
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Ingår i: 2019 International Conference on Software, Telecommunications and Computer Networks (SoftCOM). - : IEEE. - 9789532900880 - 9781728137117 ; , s. 171-176
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Konferensbidrag (refereegranskat)abstract
- The fast growth of Internet traffic, the growingimportance of cellular accesses and the escalating competitionbetween content providers and network operators result in agrowing interest in improving network performance and userexperience. In terms of network transport, different solutionsranging from tuning TCP to installing middleboxes are applied.It turns out, however, that the practical results sometimes aredisappointing and we believe that poor testing is one of thereasons for this. Indeed, many cases in the literature limittesting to the simple and rare use case of a single file download,while common and complex use cases like web browsing oftenare ignored or modelled only by considering smaller files. Tofacilitate better testing, we present a set of metrics by whichthe complexity around web pages can be characterised andthe potential for different optimisations can be estimated. Wealso derive numerical values of these metrics for a small set ofpopular web pages and study similarities and differences betweenpages with the same kind of content (newspapers, e-commerceand video) and between pages designed for the same platform(computer and smartphone).
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| 7. |
- Atxutegi, Eneko, et al.
(författare)
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On the move with TCP in current and future mobile networks
- 2017
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Ingår i: Proceedings of the 2017 8th International Conference on the Network of the Future (NOF).. - New York, USA : IEEE. - 9781538605547 ; , s. 66-72
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Konferensbidrag (refereegranskat)abstract
- Mobile wireless networks constitute an indispensable part of the global Internet, and with TCP the dominating transport protocol on the Internet, it is vital that TCP works equally well over these networks as over wired ones. This paper identifies the performance dependencies by analyzing the responsiveness of TCP NewReno and TCP CUBIC when subject to bandwidth variations related to movements in different directions. The presented evaluation complements previous studies on 4G mobile networks in two important ways: It primarily focuses on the behavior of the TCP congestion control in medium- to high-velocity mobility scenarios, and it not only considers the current 4G mobile networks, but also low latency configurations that move towards the overall potential delays in 5G networks. The paper suggests that while both CUBIC and NewReno give similar goodput in scenarios where the radio channel continuously degrades, CUBIC gives a significantly better goodput in scenarios where the radio channel quality continuously increases. This is due to CUBIC probing more aggressively for additional bandwidth. Important for the design of 5G networks, the obtained results also demonstrate that very low latencies are capable of equalizing the goodput performance of different congestion control algorithms. Only in low latency scenarios that combine both large fluctuations of available bandwidths and a mobility pattern in which the radio channel quality continuously increases can some performance differences be noticed.
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| 8. |
- Atxutegi, Eneko, et al.
(författare)
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TCP behaviour in LTE : impact of flow start-up and mobility
- 2016
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Ingår i: Wireless and Mobile Networking Conference (WMNC), 2016 9th IFIP. - : IEEE Communications Society. - 9781467387460 - 9781467387477 ; , s. 73-80
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Konferensbidrag (refereegranskat)abstract
- Mobile internet has been widely adopted and it is expected to rise to almost 4 billion users by 2020. Despite the research effort dedicated to the enhancement of its performance, there still exists a gap in the understanding of how TCP and its many variants work over LTE. To this end, this paper evaluates the extent to which five common TCP variants, CUBIC, NewReno,Westwood+, Illinois, and CAIA Delay Gradient (CDG), are able to utilise available radio resources under hard conditions, such as during start-up and in mobile scenarios at different speeds. The paper suggests that CUBIC, due to its Hybrid Slow-Start mechanism, enters congestion avoidance prematurely, and thus experiences a prolonged start-up phase. As a result, it is unable to efficiently utilise radio resources during shorter transmissionsessions. Besides, CUBIC, Illinois and NewReno, i.e., the loss-based TCP implementations, offer better throughput, and are able to better utilise available resources during mobility than Westwood+ and CDG - the delay-based variants do.
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| 9. |
- Atxutegi, Eneko, et al.
(författare)
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TCP behaviour in LTE : impact of flow start-up and mobility
- 2016
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Ingår i: Wireless and Mobile Networking Conference (WMNC), 2016 9th IFIP. - : IEEE. ; , s. 73-80
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Konferensbidrag (refereegranskat)abstract
- Nowadays, more than two billion people uses the mobile internet, and it is expected to rise to almost 4 billion by 2020. Still, there is a gap in the understanding of how TCP and its many variants work over LTE. To this end, this paper evaluates the extent to which five common TCP variants, CUBIC, NewReno, Westwood+, Illinois, and CAIA Delay Gradient (CDG), are able to utilise available radio resources under hard conditions, such as during start-up and in mobile scenarios at different speeds. The paper suggests that CUBIC, due to its Hybrid Slow- Start mechanism, enters congestion avoidance prematurely, and thus experiences a prolonged start-up phase, and is unable to efficiently utilise radio resources during shorter transmission sessions. Still, CUBIC, Illinois and NewReno, i.e., the loss-based TCP implementations, offer better throughput, and are able to better utilise available resources during mobility than Westwood+ and CDG – the delay-based variants do.
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| 10. |
- Atxutegi, Eneko, et al.
(författare)
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TCP Performance over Current Cellular Access : A Comprehensive Analysis
- 2018
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Ingår i: Autonomous Control for a Reliable Internet of Services. - Cham : Springer. - 9783319904146 ; , s. 371-400, s. 371-400
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Bokkapitel (refereegranskat)abstract
- Mobile internet usage has significantly raised over the last decade and it is expected to grow to almost 4 billion users by 2020. Even after the great effort dedicated to the improvement of the performance, there still exist unresolved questions and problems regarding the interaction between TCP and mobile broadband technologies such as LTE. This chapter collects the behavior of distinct TCP implementation under various network conditions in different LTE deployments including to which extent the performance of TCP is capable of adapting to the rapid variability of mobile networks under different network loads, with distinct flow types, during start-up phase and in mobile scenarios at different speeds. Loss-based algorithms tend to completely fill the queue, creating huge standing queues and inducing packet losses both under stillness and mobility circumstances. On the other side delay-based variants are capable of limiting the standing queue size and decreasing the amount of packets that are dropped in the eNodeB, but they are not able under some circumstances to reach the maximum capacity. Similarly, under mobility in which the radio conditions are more challenging for TCP, the loss-based TCP implementations offer better throughput and are able to better utilize available resources than the delay-based variants do. Finally, CUBIC under highly variable circumstances usually enters congestion avoidance phase prematurely, provoking a slower and longer start-up phase due to the use of Hybrid Slow-Start mechanism. Therefore, CUBIC is unable to efficiently utilize radio resources during shorter transmission sessions.
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