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| 2. |
- Haghighi, Mona, et al.
(författare)
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A Comparison of Rule-based Analysis with Regression Methods in Understanding the Risk Factors for Study Withdrawal in a Pediatric Study
- 2016
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Ingår i: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 6
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Tidskriftsartikel (refereegranskat)abstract
- Regression models are extensively used in many epidemiological studies to understand the linkage between specific outcomes of interest and their risk factors. However, regression models in general examine the average effects of the risk factors and ignore subgroups with different risk profiles. As a result, interventions are often geared towards the average member of the population, without consideration of the special health needs of different subgroups within the population. This paper demonstrates the value of using rule-based analysis methods that can identify subgroups with heterogeneous risk profiles in a population without imposing assumptions on the subgroups or method. The rules define the risk pattern of subsets of individuals by not only considering the interactions between the risk factors but also their ranges. We compared the rule-based analysis results with the results from a logistic regression model in The Environmental Determinants of Diabetes in the Young (TEDDY) study. Both methods detected a similar suite of risk factors, but the rule-based analysis was superior at detecting multiple interactions between the risk factors that characterize the subgroups. A further investigation of the particular characteristics of each subgroup may detect the special health needs of the subgroup and lead to tailored interventions.
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| 3. |
- Karlsson, Magnus, et al.
(författare)
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Vård på Centralen : Om vita rockar i det civila samhället
- 2017
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Ingår i: Socialmedicinsk Tidskrift. - 0037-833X. ; 94:5, s. 565-571
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Tidskriftsartikel (refereegranskat)abstract
- Organisationen Vård på Centralen växte fram när flyktingar anlände till Stockholm centralstation under hösten 2015. En enskild läkarstudent samlade hastigt ihop två resväskor med förbandsartiklar och receptfria mediciner, och började tillsammans med några vänner att hjälpa de anländande. Några veckor senare hade initiativet växt, och hundratals vårdutbildade volontärer organiserades via sociala medier. Resultatet blev en organisation som var lösligt organiserad, höggradigt professionaliserad, nätverksorienterad, primärt internetbaserad och verkade till följd av behov som möjligen ligger bortom de medborgliga rättigheternas räckvidd, men inom de mänskliga rättigheternas förväntan. I föreliggande text vill vi kortfattat beskriva och diskutera denna organisering. En fördjupad kunskap på området kan vara betydelsefull vid framtida situationer av liknande slag.
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| 4. |
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| 5. |
- Olsson, Viktoria, et al.
(författare)
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Sensory characteristics of meat from steers of various breeds and rearing intensities
- 2019
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Konferensbidrag (refereegranskat)abstract
- The most common category of young cattle slaughtered for beef in Sweden is bulls of dairy breed, most often reared indoors. There is however a potential in raising steers (castrated bulls) for slaughter on semi-natural pasture, which may have an impact on sensory properties of the meat. Furthermore, weight gain and carcass characteristics may be improved by crossing dairy breeds with specialised beef breeds. In combination with the new technique of sex-sorted dairy semen, beef breed semen can be used to the less superior cows in the herd without jeopardizing an adequate number of replacement heifers from the superior cows. The aim of the study was to investigate whether there are any differences in sensory meat quality between cross bred and purebred cattle and between two rearing intensities including semi-natural pasture. Sensory properties were evaluated by a trained, analytical panel consisting of six assessors by the use of descriptive analysis. The intensity of iron, acidic, tallow, milky and barny odour as well as metallic, barny and gamey flavour and basic tastes were assessed in triplicate along with attributes describing the appearance and texture of the meat. Differences were mainly found in appearance and texture attributes, but also gamey flavour and the intensity of umami were affected by the rearing and breeding regimes. The meat quality results from this study will be combined with results from other disciplines such as animal science, business administration and environmental science. It is important to be able to demonstrate various possible added values that comes from pasture-based beef production systems under Swedish conditions.
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| 6. |
- Olsson, Viktoria, et al.
(författare)
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Sensory characteristics of meat from steers of various breeds and rearing intensities
- 2019
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The most common category of young cattle slaughtered for beef in Sweden is bulls of dairy breed, most often reared indoors. There is however a potential in raising steers (castrated bulls) for slaughter on semi-natural pasture, which may have an impact on sensory properties of the meat. Furthermore, weight gain and carcass characteristics may be improved by crossing dairy breeds with specialised beef breeds. In combination with the new technique of sex-sorted dairy semen, beef breed semen can be used to the less superior cows in the herd without jeopardizing an adequate number of replacement heifers from the superior cows. The aim of the study was to investigate whether there are any differences in sensory meat quality between cross bred and purebred cattle and between two rearing intensities including semi-natural pasture. Sensory properties were evaluated by a trained, analytical panel consisting of six assessors by the use of descriptive analysis. The intensity of iron, acidic, tallow, milky and barny odour as well as metallic, barny and gamey flavour and basic tastes were assessed in triplicate along with attributes describing the appearance and texture of the meat. Differences were mainly found in appearance and texture attributes, but also gamey flavour and the intensity of umami were affected by the rearing and breeding regimes. The meat quality results from this study will be combined with results from other disciplines such as animal science, business administration and environmental science. It is important to be able to demonstrate various possible added values that comes from pasture-based beef production systems under Swedish conditions.
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| 7. |
- Pajevic, Ljubica, et al.
(författare)
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Ensuring Persistent Content in Opportunistic Networks via Stochastic Stability Analysis
- 2018
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Ingår i: ACM Transactions on Modeling and Performance Evaluation of Computing Systems (TOMPECS). - : ACM Digital Library. - 2376-3639 .- 2376-3647. ; 3:4, s. 16:1-16:23
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Tidskriftsartikel (refereegranskat)abstract
- The emerging device-to-device communication solutions and the abundance of mobile applications and services make opportunistic networking not only a feasible solution but also an important component of future wireless networks. Specifically, the distribution of locally relevant content could be based on the community of mobile users visiting an area, if long-term content survival can be ensured this way. In this article, we establish the conditions of content survival in such opportunistic networks, considering the user mobility patterns, as well as the time users keep forwarding the content, as the controllable system parameter.We model the content spreading with an epidemic process, and derive a stochastic differential equations based approximation. By means of stability analysis, we determine the necessary user contribution to ensure content survival. We show that the required contribution from the users depends significantly on the size of the population, that users need to redistribute content only in a short period within their stay, and that they can decrease their contribution significantly in crowded areas. Hence, with the appropriate control of the system parameters, opportunistic content sharing can be both reliable and sustainable.
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| 8. |
- Pajevic, Ljubica, et al.
(författare)
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Predicting the Users’ Next Location From WLAN Mobility Data
- 2018
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Ingår i: 2018 IEEE International Symposium on Local and Metropolitan Area Networks (LANMAN). - 9781538645338
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Konferensbidrag (refereegranskat)abstract
- Accurate prediction of user mobility allows the efficient use of resources in our ubiquitously connected environment. In this work we study the predictability of the users’ next location, considering a campus scenario with highly mobile users. We utilize Markov predictors, and estimate the theoretical predictability limits. Based on the mobility traces of nearly 7400 wireless network users, we estimate that the maximum predictability of the users is on average 82%, and we find that the best Markov predictor is accurate 67% of the time. In addition, we show that moderate performance gains can be achieved by leveraging multi-location prediction.
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| 9. |
- Pajevic, Ljubica, et al.
(författare)
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Revisiting the Modeling of User Association Patterns in a University Wireless Network
- 2018
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Ingår i: 2018 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC). - : IEEE. - 9781538617342
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Konferensbidrag (refereegranskat)abstract
- This paper presents an analysis of a large trace of user associations in a university wireless network, which includes around one thousand access points over live campuses. The trace is obtained from RADIUS authentication logs and its merit is in its recency, scale and duration. We propose a methodology for extracting association statistics from these logs, and look at visiting time distributions and processes of user arrivals to access points. We find that a large fraction of the network-around half of all access points-experiences time-varying Poisson arrival process, and association distributions can be modeled by two-stage hyper-exponential distributions at most of the access point. While network associations in campus wireless networks have been extensively studied in the literature, our study reveals changing patterns in user arrival processes and association durations, which seem to be characteristic for networks of predominantly mobile users, and allows the use of tractable network occupancy models.
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