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  • 2851.
    Öberg, Sebastian
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för teknik, TEK.
    Olausson, Daniel
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för teknik, TEK.
    Effektivisering av processamverkan mellan produktion och distribution vid Ecophon2012Independent thesis Basic level (university diploma), 15 poäng / 22,5 hpOppgave
    Abstract [sv]

    Syftet med den är undersökningen har varit att skapa en förståelse för att kunna förklara de problem som uppstår vid en lagerflytt mellan produktion och distribution inom ett affärssystem. För att kunna uppnå syftet identifierades de teorier som skulle komma att behövas. Teorierna jämfördes med en nulägesbeskrivning på företaget för att se hur det fungerade i affärssystemet. Analyseringen utav teorierna och nuläget bidrog till att påpeka var problem kunde uppstå eller om de redan fanns inom systemet. Tack vare den analyserade informationen kunde slutligen slutsatser om rekommendationer påpekas för hur problemen skulle kunna motverkas, om inte motarbetas.

  • 2852.
    Öberg, Tomas
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Data needs for socio-economic analysis - bridging the gap between safety and impact assessments2012Inngår i: Contemporary Concepts in Toxicology, Society for Toxicology , 2012Konferansepaper (Annet vitenskapelig)
  • 2853.
    Öberg, Tomas
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Importance of health and environmental impact assessments for the evaluation of restriction proposals and authorisation applications under REACH2012Inngår i: Presentation vid European Environment & Public Health Consultative Conference (3d EPH Annual Meeting) i Krakow, 25-27 oktober, 2012., 2012Konferansepaper (Annet vitenskapelig)
  • 2854.
    Öberg, Tomas
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Modeling vapor pressure.2011Inngår i: Presentation vid ECO Summer School, Leiden University, 26 september, 2011., 2011Konferansepaper (Annet vitenskapelig)
  • 2855.
    Öberg, Tomas
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Non-testing methods in the safety assessment of chemicals.: Naturvetenskapligt seminarium, Kalmar, 25 november, 2011.2011Annet (Annet vitenskapelig)
  • 2856.
    Öberg, Tomas
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Read-across and QSARs in the risk assessment of food and feed2010Inngår i: Presentation vid Experts Workshop on "Dealing with Uncertainty of Non-Test Methods under REACH" i Helsingfors, 23-24 september, 2010., 2010Konferansepaper (Annet vitenskapelig)
  • 2857.
    Öberg, Tomas
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    The role of EFSA in integrated food-environment risk assessments2010Inngår i: Presentation vid ILSI Europe 2010 Annual Symposium i Bryssel, 25-26 mars, 2010., 2010Konferansepaper (Annet vitenskapelig)
  • 2858.
    Öberg, Tomas
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Treatment of uncertainty from QSAR models in risk assessment2009Inngår i: Presentation vid the Annual Meeting of the Society for Risk Analysis, Baltimore, Maryland, 6-9 december 2009., 2009Konferansepaper (Annet vitenskapelig)
  • 2859.
    Öberg, Tomas
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Iqbal, Muhammad Sarfraz
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    The chemical and environmental property space of REACH chemicals2012Inngår i: Chemosphere, ISSN 0045-6535, E-ISSN 1879-1298, Vol. 87, nr 8, s. 975-981Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The European regulation on chemicals, REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals), came into force on 1 June 2007. With pre-registration complete in 2008, data for these substances may provide an overview of the expected chemical space and its characteristics. In this paper, using various in silico computation tools, we evaluate 48782 neutral organic compounds from the list to identify hazardous and safe compounds. Two different classification schemes (modified Verhaar and ECOSAR) identified between 17% and 25% of the compounds as expressing only baseline toxicity (narcosis). A smaller portion could be identified as reactive (19%) or specifically acting (2.7%), while the majority were non-assigned (61%). Overall environmental persistence, bioaccumulation and long-range transport potential were evaluated using structure-activity relationships and a multimedia fugacity-based model. A surprisingly high proportion of compounds (20%), mainly aromatic and halogenated, had a very high estimated persistence (> 195 d). The proportion of compounds with a very high estimated bioconcentration or bioaccumulation factor (> 5000) was substantially less (6.9%). Finally, a list was compiled of those compounds within the applicability domain of the models used, meeting both persistence and bioaccumulation criteria, and with a long-range transport potential comparable to PCB. This list of 68 potential persistent organic pollutants contained many well-known compounds (all halogenated), but notably also five fluorinated compounds that were not included in the EINECS inventory. This study demonstrates the usability of in silico tools for identification of potentially environmentally hazardous chemicals.

  • 2860.
    Öberg, Tomas
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Iqbal, Muhammad Sarfraz
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    The REACH space of organic chemistry and hazard properties.2011Inngår i: Presentation vid 6th International Symposium on Computational Methods in Toxicology and Pharmacology Integrating Internet Resources (CMTPI-2011) i Maribor, 3-7 september, 2011., 2011Konferansepaper (Annet vitenskapelig)
  • 2861.
    Öberg, Tomas
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Liu, Tao
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Extension of a prediction model to estimate vapor pressures of perfluorinated compounds (PFCs)2011Inngår i: Chemometrics and Intelligent Laboratory Systems, ISSN 0169-7439, E-ISSN 1873-3239, Vol. 107, nr 1, s. 59-64Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Perfluorinated compounds (PFCs) are persistent and have been found globally as environmental contaminants. Release into the environment can occur from manufacturing, industrial and consumer uses. The vapor pressure is an important physical property influencing both the release and the environmental partitioning, but few reliable experimental determinations are available. Here we update a previous PLS regression model to cover also this compound class, using only a few calibration compounds. The recalibration is accomplished by applying a leverage-based weighting scheme that is generally applicable in updating structure–property relationships. The predictive performance is validated with an external validation set and is considerably better than for other standard estimation software, both with regard to accuracy and precision. The model can be given a chemical interpretation and the prediction error for the liquid vapor pressure is within 0.2 log units of Pa. Finally, the model is applied and vapor pressure estimates are reported for more than 200 PFCs where no reliable experimental data are available.

  • 2862.
    Öberg, Tomas
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Liu, Tao
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Updating existing QSAR models: selection and weighting of new data2010Inngår i: Journal of Cheminformatics, ISSN 1758-2946, E-ISSN 1758-2946, Vol. 2, nr Suppl 1, s. P19-Artikkel i tidsskrift (Annet vitenskapelig)
    Abstract [en]

    Computational chemistry and quantitative structure-activity relationships (QSAR) are foreseen to be extensively used in the implementation of the new REACH regulation for chemicals in Europe. However, for some compound groups the data are too few in number to permit both calibration and testing of a new model. Usage and previously developed or updated models are then viable alternatives.Perfluorocarboxylic acids (PFCAs) and fluoroteleomer alcohols (FTOHs) are two groups of environmentally relevant compounds, with unique physical and chemical properties. The subcooled liquid vapour pressure (pL) is one such property, where experimental determinations are limited and far from consistent [1]. Updating is, however, challenging when the new compounds are far outside of the original calibration domain space. But by carefully selecting and weighting only three new compounds, we have been able to update a previously developed general QSAR model [2], to cover the new domain while maintaining predictive performance for the earlier calibration and test data. The optimal weighting scheme was determined from the sample leverages and residuals in the calibration phase [3].The performance of this re-calibrated model greatly surpassed previous modelling attempts [4], when applied to an external test set of two PFCAs and four FTOHs with pL in the range 0.2-200 Pa; with Q2Ext = 0.994 and RMSEP = 0.190 units of log Pa. The domain coverage also increased from 1% to 51%, for 426 perfluoroalkylated compounds selected from the REACH registration list, the PhysProp database, and the OECD 2006 survey [5]. Selection and weighting of new calibration data can thus facilitate the extension and use of existing QSAR models. This investigation was supported by the EU FP7 project CADASTER (grant agreement no. 212668).

  • 2863.
    Öfverman, Jakob
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för datavetenskap, fysik och matematik, DFM.
    Information Presentation in Search Engines on Mobile Devices2010Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    This thesis discusses the possibilities to visualise the presentation layer of a search engine on a mobile device in an alternative way. Previous work in the area has shown that the use of text-based-lists can be problematic when accessed on a device with a limited display. In the scope of the thesis and in order to tackle the current problems when displaying the results a literature review was carried out. The findings of the review formed the basis for a requirement definition on which a mock-up was developed. The mock-up was then evaluated and tested during a usability test where a number of users got to experience the alternative presentation layer that uses a visualisation technique called tree- map. The results from the test show that the mock-up could be seen as a alternative to the current presentation of results. The mock-up also shows that a future implementation could also include the use of categories and sorting of information in order to provide content with a meaning.

  • 2864.
    Öhlin, Anton
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för datavetenskap, fysik och matematik, DFM.
    Viking, Sebastian
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för datavetenskap, fysik och matematik, DFM.
    MPLS kontra traditionell IP-routing: en jämförelse av resursåtgång2011Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Multi Protocol Label Switching (MPLS) är en routingteknik som blir allt vanligare i dagens nätverk. Vid implementation av MPLS i nätverk är det grundläggande att hårdvaran har tillräckligt hög prestanda för att hantera tekniken. Om så inte är fallet kan det leda till negativa konsekvenser såsom paketförluster eller i värsta fall att routern havererar. Syftet med arbetet var att ta reda på hur processorbelastningen på en router skiljer sig när MPLS var implementerat jämfört med traditionell IP-routing. Routingprotokollen BGP, OSPF och RIP användes tillsammans med de olika routingteknikerna för att se vilket av dessa som krävde minst processorkraft.

    För att ta reda på hur processorbelastningen påverkades skapades en experimentmiljö. Varje routingprotokoll konfigurerades tillsammans med MPLS respektive traditionell IP-routing, vilket gav oss sex olika scenarion. Trafik skickades sedan genom nätverket med hjälp av applikationen Ostinato för att belasta enheterna.

    Resultatet av testerna visade att processorbelastningen blev högre för MPLS än för traditionell IP-routing. Det gällde för samtliga routingprotokoll. Det routingprotokoll som tillsammans med MPLS lyckades hålla processorbealstningen lägst var BGP, medans OSPF orsakade högst processorbelastning. Skillnaden mellan routingprotokollen OSPF och RIP var marginell.

  • 2865.
    Öhlund, Sten-Erik
    et al.
    Linnéuniversitetet, Fakultetsnämnden för hälsa, socialt arbete och beteendevetenskap, Institutionen för hälso- och vårdvetenskap, HV. Linköping University, Sweden ; Logica Sverige AB, Sweden.
    Åstrand, Bengt
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Petersson, Göran
    Linnéuniversitetet, Fakultetsnämnden för hälsa, socialt arbete och beteendevetenskap, Institutionen för hälso- och vårdvetenskap, HV.
    Improving interoperability in ePrescribing2012Inngår i: Interactive Journal of Medical Research, E-ISSN 1929-073X, Vol. 1, nr 2, artikkel-id e17Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Background: The increased application of eServices in health care, in general, and ePrescribing (electronic prescribing) in particular, have brought quality and interoperability to the forefront. The application of standards has been put forward as one important factor in improving interoperability. However, less focus has been placed on other factors, such as stakeholders’ involvement and the measurement of interoperability. An information system (IS) can be regarded to comprise an instrument for technology-mediated work communication. In this study, interoperability refers to the interoperation in the ePrescribing process, involving people, systems, procedures and organizations. We have focused on the quality of the ePrescription message as one component of the interoperation in the ePrescribing process.

    Objective: The objective was to analyze how combined efforts in improving interoperability with the introduction of the new national ePrescription format (NEF) have impacted interoperability in the ePrescribing process in Sweden, with the focus on the quality of the ePrescription message.

    Methods: Consecutive sampling of electronic prescriptions in Sweden before and after the introduction of NEF was undertaken in April 2008 (pre-NEF) and April 2009 (post-NEF). Interoperability problems were identified and classified based on message format specifications and prescription rules.

    Results: The introduction of NEF improved the interoperability of ePrescriptions substantially. In the pre-NEF sample, a total of 98.6% of the prescriptions had errors. In the post-NEF sample, only 0.9% of the prescriptions had errors. The mean number of errors was fewer for the erroneous prescriptions: 4.8 in pre-NEF compared to 1.0 in post-NEF.

    Conclusions: We conclude that a systematic comprehensive work on interoperability, covering technical, semantical, professional, judicial and process aspects, involving the stakeholders, resulted in an improved interoperability of ePrescriptions.

  • 2866.
    Öhrling, Christina
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Förhållandet mellan fixationsdisparitet och prematura2012Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Syfte: Syftet med arbetet har varit att undersöka fixationsdisparitet hos personer som fötts för tidigt och för att se om det finns någon skillnad mellan dessa och personer som fötts i fullgången tid. Syftet har även varit att undersöka om Saladin card kan anses vara en pålitlig metod för att mäta fixationsdisparitet.

    Metod: Fixationsdispariteten mättes upp med Saladin card och associerade forier mättes upp med Mallett unit. Vidare mättes dissocierade forier upp med Modifierad Thorington och stereoseendet mättes upp med Titmus fly. I resultaten jämfördes 22 st prematura deltagare med 22 st fullgångna deltagare. Samtliga 44 personer jämfördes sedan mot varandra vid en utvärdering av de olika mätmetoderna.

    Resultat: Vid en jämförelse mellan de båda grupperna, prematura och fullgångna, fanns ingen signifikant skillnad i resultaten. Medelvärdet för de båda grupperna låg inom vad som räknas som normala värden för de olika mätningarna. En jämförelse mellan Saladin card och Mallet unit påvisade likartade resultat.

    Slutsats: Det var ingen signifikant skillnad i fixationsdisparitet mellan de fullgångna och de prematura deltagarna. Saladin card är ett mer känsligt test än Mallett unit för att mäta upp små horisontella och vertikala avvikelser. 

  • 2867.
    Österlund, Erik
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för datavetenskap, fysik och matematik, DFM.
    Automatic memory management system for automatic parallelization2011Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    With Moore’s law coming to an end and the era of multiprocessor chips emerging, the need for ways of dealing with the essential problems with concurrency is becoming imminent. Automatic parallelization for imperative languages and pure functions in functional programming languages all try to prove independence statically. This thesis argues that independence is dynamic in nature. Static analysis for automatic parallelization has failed to do anything but trivial optimizations.

    This thesis shows a new approach where dynamic analysis about the system is provided for very low costs using a garbage collector that has to go through all live cells anyway. Immutable sub-graphs of objects that cannot change state are found. Their methods become pure functions that can be parallelized. The garbage collector implemented is a kind of replicating collector. It is about three times faster than Boehm’s collector in garbage collection, fully concurrent and provides the dynamic analysis almost for free.

  • 2868.
    Österlund, Erik
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för datavetenskap, fysik och matematik, DFM.
    Garbage Collection supporting automatic JIT parallelization in JVM2012Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
    Abstract [en]

    With increasing clock-rates in CPUs coming to an end, a need for parallelization has emerged. This thesis proposes a dynamic purity analysis of objects, detecting independent execution paths that may be run in parallel. The analysis relies in speculative guesses and may be rolled back when proven wrong. It piggybags on an efficient replicating garbage collector integrated to JVM.

    The efficiency of the algorithms are shown in benchmark, and are comparable to the speed of state of the art garbage collectors in hotspot’s JVM.

    With this dynamic purity analysis now accessible in Java programs, the potential for automatic JIT-parallelization of pure methods is possible.

  • 2869.
    Österlund, Erik
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för datavetenskap, fysik och matematik, DFM.
    Löwe, Welf
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för datavetenskap, fysik och matematik, DFM.
    Analysis of pure methods using garbage collection2012Inngår i: Proceedings of the 2012 ACM SIGPLAN Workshop on Memory Systems Performance and Correctness, ACM Press, 2012, s. 48-57Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Parallelization and other optimizations often depend on static dependence analysis. This approach requires methods to be independent regardless of the input data, which is not always the case.

    Our contribution is a dynamic analysis "guessing" if methods are pure, i. e., if they do not change state. The analysis is piggybacking on a garbage collector, more specifically, a concurrent, replicating garbage collector. It guesses whether objects are immutable by looking at actual mutations observed by the garbage collector. The analysis is essentially for free. In fact, our concurrent garbage collector including analysis outperforms Boehm's stop-the-world collector (without any analysis), as we show in experiments. Moreover, false guesses can be rolled back efficiently.

    The results can be used for just-in-time parallelization allowing an automatic parallelization of methods that are pure over certain periods of time. Hence, compared to parallelization based on static dependence analysis, more programs potentially benefit from parallelization.

  • 2870.
    Österman, Marie
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Utvärdering av kapillärt protrombinkomplex i EDTA-microtainerrör2010Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Blodcirkulationen är essentiell för människans överlevnad. När blodets koagulation- och antikoagulationssystem kommer i obalans kan koagelbildning orsaka venös tromboembolism, blodpropp. Patienter som har haft en blodpropp behandlas med antivitamin K-läkemedel (Waran®) för att förebygga recidiv. Dosen är individanpassad och för att erhålla rätt terapeutisk verkan krävs övervakning genom mätning av protrombinkomplex i plasma.

    Syftet med studien var att utföra en utvärdering samt göra en hållbarhetsstudie på en ny provtagningsrutin för kapillära protrombinkomplex.I studien ingick 48 personer varav 33 män och 15 kvinnor. Åldersfördelning var 22-88 år och medianålder var 62 år. I samband med ordinarie provtagning, vilken användes som referensmetod, för P-protrombinkomplex togs ca 350 μL blod kapillärt i EDTA-microtainerrör. Genom spädning (1:4) av EDTA-blod i citratbuffert möjliggjordes analys av kapillärt P-protrombinkomplex efter 1, 8 och 24 timmar. Samtliga prover analyserades med turbidimetrisk detektion i instrumentet ACL Top 500. Studiens analysresultat jämfördes mot referensmetoden.Studien visar att protrombinkomplexaktiviteten är stabil i blod med EDTA-tillsats i upp till 8 timmar efter provtagning. Dock kan stabiliteten inte garanteras hos individer med hereditära koagulationsrubbningar.

  • 2871.
    Österström, Ola
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Lilja, Clas
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Carbonic anhydrase and calcium mobilization from the avian eggshell during embryonic development2010Inngår i: 25th International Ornithological Congress 22 to 28 August 2010 ISBN 978-85-911618-0-5 Campos do Jordão, SP, BRAZIL: Abstracts of the 25 International Ornithological Congress, 2010, s. 683-Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The avian eggshell contributes to successful embryogenesis by acting as the major source of calcium. It has been suggested, moreover, that birds have evolved eggshells with different structures adapted to cope with different calcium requirements imposed by different growth rates and modes of development. Yet the mechanism of calcium removal from the avian eggshell by the embryo remains unknown. Using enzyme histochemistry, we here test an old hypothesis stating that calcium is released from the eggshell by means of acidification by the action of carbonic anhydrase (CA) in the extra-embryonic chorio-allantoic membrane (CAM). This enzyme catalyses the reversible reaction CO2+H2O <-> H+HCO3 and is known to take significant part in acid-base regulation in the body. We examined CAMs from two bird species, Coturnix japonica and Sturnus vulgaris, with very different growth rates and modes of development. The CAMs were examined for CA activity at the later stages of embryonic development. However, in all CAMs examined, staining for CA was absent, leading us to the conclusion that existing hypothesis about a link between CA and embryonic calcium mobilization from the avian eggshell is at present premature.

  • 2872.
    Österström, Ola
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Lilja, Clas
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Evolution of avian eggshell structure.2012Inngår i: Journal of morphology (1931. Print), ISSN 0362-2525, E-ISSN 1097-4687, Vol. 273, nr 3, s. 241-247Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Data are presented suggesting that birds have evolved eggs with shells containing different structures (numbers of mammillae per unit of inner eggshell surface area, i.e., mammillary densities) to cope up with different calcium requirements imposed by different growth rates and modes of development. Precocial bird species grow slowly, but have high mammillary density, while altricial bird species grow rapidly, but have low mammillary density. These results suggest an adaptation associated with growth rate and mode of development and show, moreover, that the mammillary layer is indicative of the breeding biology of the bird.

  • 2873.
    Östlund, Martin
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för datavetenskap, fysik och matematik, DFM.
    Axelsson, Clara
    Linnéuniversitetet, Fakultetsnämnden för hälsa, socialt arbete och beteendevetenskap, Institutionen för hälso- och vårdvetenskap, HV.
    Johansson, Pauline
    Linnéuniversitetet, Fakultetsnämnden för hälsa, socialt arbete och beteendevetenskap, Institutionen för hälso- och vårdvetenskap, HV.
    Johnsson, Stefan
    Lagerlund, Magnus
    Widell, Ingela
    Wilde Björling, Camilla
    Using computer tablets to empower breast cancer patients undergoing radiation therapy treatment2012Konferansepaper (Fagfellevurdert)
    Abstract [en]

    BackgroundEfficient information dispersal and effective communication are key issues in increasing quality of care for patients undergoing radiation therapy. Radiation therapy consists of daily treatment sessions every weekday for 4-6 weeks. Although this means that patients are in daily contact with nursing staff, there is little time at these quick in-and-out sessions to address any substantive issues beyond the mechanics of the actual treatment procedure. Our aim is to explore the potential usefulness of computer tablets as an enabling device for making patient-staff information interchange more accessible and efficient. We are especially interested in investigating the empowerment effects that we believe will follow when making it easier for patients to influence the course of their treatment.

    MethodsFrom april to june 2012 all breast cancer patients scheduled for adjuvant radiation therapy treatment at the county hospital in Kalmar (Sweden) will be offered the opportunity to borrow a tablet computer during the course of their treatment. The tablet offers secure access to a web site containing illness-, treatment- and clinic-specific information, including a number of videos demonstrating the treatment procedure; a secure discussion forum in which patients can ask questions to staff; and a set of automatically processed surveys that provide staff with instant feedback from patients. Post-treatment interviews will be conducted with participating patients as well as with the staff on their respective experience of using the tablets. Patients will also fill out a survey and user logs from the web site will be analyzed to determine usage patterns.

    ResultsAt the time of writing we have started off the first couple of patients. Initial reactions are positive from both patients and staff. At the the time of the conference we will have evaluated the first set of patients and be able to present the results of this. We expect to see patients that are more confident and less anxious by being better prepared for their treatment both factually and emotionally. For the medical staff, we expect to see that the instant feedback provided by patients, via the questions they ask and the survey answers they submit, will allow staff to react more swiftly and more accurately to meet the patients’ needs and wants, and in so doing provide both better medical care and better emotional support.

    ConclusionsComputer tablets offer an efficient and accessible way for patients to inform themselves and to communicate with staff. The instant feedback from patients provides staff with the input they need to provide the best possible care, both medically and in providing emotional support. The sense of control, and actual control, over the course of their treatment that this will bring to patients, we believe will lead to a sense of empowerment that will help them better deal with the emotionally taxing experience it is to undergo treatment for a life-threatening condition.

  • 2874.
    Östlund, Martin
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för datavetenskap, fysik och matematik, DFM.
    Dahlbäck, Nils
    Linköping University.
    Petersson, Göran
    Linnéuniversitetet, Fakultetsnämnden för hälsa, socialt arbete och beteendevetenskap, Institutionen för hälso- och vårdvetenskap, HV.
    3D visualisation as a communicative aid in pharmaceutical advice-giving over distance2011Inngår i: Journal of Medical Internet Research, ISSN 1438-8871, E-ISSN 1438-8871, Vol. 13, nr 3, artikkel-id e50Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    BACKGROUND:

    Medication misuse results in considerable problems for both patient and society. It is a complex problem with many contributing factors, including timely access to product information.

    OBJECTIVE:

    To investigate the value of 3-dimensional (3D) visualization paired with video conferencing as a tool for pharmaceutical advice over distance in terms of accessibility and ease of use for the advice seeker.

    METHODS:

    We created a Web-based communication service called AssistancePlus that allows an advisor to demonstrate the physical handling of a complex pharmaceutical product to an advice seeker with the aid of 3D visualization and audio/video conferencing. AssistancePlus was tested in 2 separate user studies performed in a usability lab, under realistic settings and emulating a real usage situation. In the first study, 10 pharmacy students were assisted by 2 advisors from the Swedish National Co-operation of Pharmacies' call centre on the use of an asthma inhaler. The student-advisor interview sessions were filmed on video to qualitatively explore their experience of giving and receiving advice with the aid of 3D visualization. In the second study, 3 advisors from the same call centre instructed 23 participants recruited from the general public on the use of 2 products: (1) an insulin injection pen, and (2) a growth hormone injection syringe. First, participants received advice on one product in an audio-recorded telephone call and for the other product in a video-recorded AssistancePlus session (product order balanced). In conjunction with the AssistancePlus session, participants answered a questionnaire regarding accessibility, perceived expressiveness, and general usefulness of 3D visualization for advice-giving over distance compared with the telephone and were given a short interview focusing on their experience of the 3D features.

    RESULTS:

    In both studies, participants found the AssistancePlus service helpful in providing clear and exact instructions. In the second study, directly comparing AssistancePlus and the telephone, AssistancePlus was judged positively for ease of communication (P = .001), personal contact (P = .001), explanatory power (P < .001), and efficiency (P < .001). Participants in both studies said that they would welcome this type of service as an alternative to the telephone and to face-to-face interaction when a physical meeting is not possible or not convenient. However, although AssistancePlus was considered as easy to use as the telephone, they would choose AssistancePlus over the telephone only when the complexity of the question demanded the higher level of expressiveness it offers. For simpler questions, a simpler service was preferred.

    CONCLUSIONS:

    3D visualization paired with video conferencing can be useful for advice-giving over distance, specifically for issues that require a higher level of communicative expressiveness than the telephone can offer. 3D-supported advice-giving can increase the range of issues that can be handled over distance and thus improve access to product information.

  • 2875.
    Öving, Ove
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Sjöfartshögskolan, SJÖ.
    Befälhavarens rättslöshet eller myndigheters lovliga byte2011Rapport (Annet (populærvitenskap, debatt, mm))
  • 2876.
    Öving, Ove
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Sjöfartshögskolan, SJÖ.
    Criminalisation of the ship´s master and his crew2012Rapport (Annet vitenskapelig)
  • 2877.
    Özdemir, Hulya
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för teknik, TEK.
    Abbas, Azad
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för teknik, TEK.
    Analyzing an Equivalent Single Layer Shim Model to be used for Brake Squeal Reduction2011Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
    Abstract [en]

    The goal in this thesis was to reduce a multilayer shim model, which was modeled from steel and polymer (isotropic materials), into an equivalent single layer shim model. The procedure was to use mathematical formulations to convert a multilayer shim into an ESL (equivalent single layer) shim. Here, a transverse isotropic model is used to prepare for future orthotropic layers. The results show that the ESL model behaves isotropically. In the 2 layer model there was no squeal noise whereas in the ESL models there is.

  • 2878.
    Öztürk, Muhammed Hüseyin
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för datavetenskap, fysik och matematik, DFM.
    A Survey on Cloud Computing and Prospects for Information Visualization2010Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Today’s computing vision makes users to access services, applications via lightweight portable devices instead of powerful personal computers (PC). Since today’s applications and services need strong computing power and data storage, raising question will be “Who will provide these 2 attributes if users do not?” Cloud computing trend moves computing power and data storage from users’ side to application infrastructure side. The services that traditionally stored in users’ own computers will move into cloud computing platform and delivered by the Internet to its users. This new platform comes with its own benefits and design characteristics. Since all information data will move into another platform than individual computers, information visualization will be an opportunity field to analyze and maintain the cloud system structure as well as delivering abstract data into meaningful way to end users.

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