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  • 21551.
    Öberg, Lena-Maria
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Traceable Information Systems: Factors That Improve Traceability Between Information and Processes Over Time2007Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    Preservation of information is not a new issue but preservation of digital information has a relatively short history. Since the 60’s when computers began to be used within administration, digital information that has had to be preserved over time.The problem addressed in this research is how to preserve understandable information over time. Information is context dependent, which means that without context it is not possible to use the information. Process is one part of the context. And an important issue when preserving information is then to be able to trace an information

    object to the process where in it has been created and managed. Associating information to a particular process creates the possibility of relating information objects to each other and also to the context in which the information has been created and used. The aim of this thesis is to identify and structure factors that can improve the traceability between information and processes over time. A set of factors based on case studies and a set of analytical methods are presented that can improve the traceability over time. These factors have been identified and structured by the use of the Synergy-4 model. They have been identified within four different spheres namely: competence, management, organization/procedure and technology. The factors have further been structured in three different time states namely: creation time, short and middle term and long-term. The research concludes that there are a lot of factors influencing ability to preserve information. Preservation issues include selection of metadata standards, organizational culture, lack of understanding from management and formalization of documents. The conclusion is that if an organization wants to succeed in preserving traceable information they have to build strategies that cover the issues from a range of different angles. This thesis suggests that crucial angles are competence, management, organization/procedure

    and technology. Furthermore, the strategies must be in place at the stage of creationof the information objects.

  • 21552.
    Öberg, Lena-Maria
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Borglund, Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Operational use of Records2006In: proceedings of IRIS 29, 2006Conference paper (Refereed)
    Abstract [en]

    The changeover from paper based records to electronic records in many organizations involves no longer only recordkeeping experts, but also people from the information system community. Electronic records are created, managed and preserved within information systems and methods to support this must be developed. In this paper the operational use of records and how that use might affect development of information systems supporting recordkeeping are of interest. This paper is empirical grounded with data from four previously performed studies. The results are compared with two existing models of recordkeeping; the life-cycle model and the Record Continuum Model. This paper presents a result where operational records use can be described in three categories; decision support, intelligence support and information retrieval. The operational use of records is widespread, difficult to predict, and not always related to a record�s original purpose of use. A record has an operational value that not always has been an issue of interest by the recordkeeping community. This altogether motivates both that a proactive approach is necessary when designing information system supporting recordkeeping, but also that the Record Continuum Model is more applicable when dealing with electronic records.

  • 21553.
    Öberg, Lena-Maria
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Borglund, Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    What are the Characteristics of Records?2005In: Proceedings of the 28th Information Systems Research Seminar in Scandinavia, 2005, 55-76 p.Conference paper (Refereed)
    Abstract [en]

    Project documentations, minutes of meeting, emergency plans, and inspection reports are all examples of records, recorded information. One key characteristic of records is preservation, records may be preserved for long time. There is a changeover from paper based records to electronic records in many organizations. Electronic records are part of computerbased information systems and need to be handled automatically following archival requirements to remain trustworthiness during preservation. The ISO definition of record is abstract and give limited support in understanding what a record is on operational level. Knowledge valuable for practitoners involved in design and development of information systems. The aim of this paper is to identify different classes of records, and identify categories of characteristics or variables for these records, i.e. make records operational. This paper is based on a qualitative case study performed at four different organizations. Empirical data was collected from multiple sources in order to understand records. More than 100 different records were identified, which together made ten classes of records. The classes together with the characteristics resulted in an object oriented based diagram, a visualization of the analysis of the empirical data.

  • 21554.
    Öberg, Lena-Maria
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Borglund, Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    What are the Characteristics of Records?2006In: International Journal of Public Information Systems, ISSN 1653-4360, Vol. 2, no 1, 55-76 p.Article in journal (Refereed)
    Abstract [en]

    Project documentation, minutes of meetings, emergency plans, and inspection reports are all examples of records, recorded information. There is a changeover from paper-based records to electronic records in many organizations and these organizations often implement information systems managing electronic records that only take archival requirements into consideration to some extent, if at all. This is a problem that makes preservation of electronic records difficult. The aim of this paper is to describe the characteristics of records, based on a study of empirical data and archival theory. It is essential to identify and understand the characteristics of a record in order to manage and preserve records in computerised systems. Knowledge of what characteristics a record has is one way to make it possible to formalize records. Formalization at different levels is needed for computerized management of records. This paper is based on a qualitative case study performed at four different organizations in Sweden. Empirical data was collected from multiple sources within each organization and resulted in five groups of characteristics with several sublevels. The empirical data were compared with recordkeeping and archival theory. Based on this study the essential characteristics of records were identified as context, form, organization, structure and version/copy.

  • 21555.
    Öberg, Lena-Marie
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    To Capture and Preserve Documents in Processes2005In: Information Management in modern enterprise - Issues & solutions: Proceedings of the 2005 international business information management conference July 5-7, 2005, Lisbon, Portugal, IBIMA , 2005, 181-183 p.Conference paper (Refereed)
  • 21556.
    Öberg, Lena-Marie
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Computer and System science.
    Nyström, Christina Amcoff
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Computer and System science.
    Evaluation of the level of collaboration in a regional crisis exercise setting: - the use of Community of Inquiry2016In: Proceedings of Information systems research seminar in Scandinavia (IRIS) 2016, 2016Conference paper (Refereed)
    Abstract [en]

    Planning for regional security and crisis management could be supported by well performed exercises. These exercises should be evaluated from different views in order to investigate the participants learning from the exercise. Since the evaluation seldom rest upon established learning theories it will be difficult to evaluate if the exercise will lead to the stated goals. Authorities in the counties of Jämtland and Västernorrland, intend to implement such exercise spring, 2016. The Theme for the exercise is “Flooding” - “Höga flöden” based on a scenario describing extremely high rainfall which could affect hydroelectric dams. The authorities should act and collaborate based on local crisis plans and how the scenario changes over time. We intend to use the Community of inquiry model when evaluating how the participants act, reflect and learn from the exercise. The Community of inquiry (CoI) model consists of three elements: social presence, cognitive presence and teaching presence. The model assumes that learning occurs within the Community through the interaction of this three core elements.  We intend to use a validated version of a survey instrument connected to the CoI model (Arbaugh et al, 2008). Hence, the aim of this paper is to propose an evaluation method to evaluate levels of communities in regional exercises.

  • 21557.
    Öberg, Linda
    Mid Sweden University, Faculty of Human Sciences, Department of Education.
    Den interaktiva skrivtavlan: En kvalitativ undersökning på fem förskollärares uppfattningar av den interaktiva skrivtavlan2014Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
  • 21558.
    Öberg, Lisa
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Treeline dynamics in short and long term perspectives: observational and historical evidence from the southern Swedish Scandes2013Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Treelines in high-mountain regions are constrained by heat deficiency, although the working mechanisms are still not entirely understood. Observational and paleoecological studies on treeline performance may contribute to increased understanding of the treeline phenomenon in general. The present thesis addresses elevational shifts of alpine treelines in the Swedish Scandes. By various analytical tools, the studies embrace widely different temporal scales.

    The concept treeline refers to the elevation (m a.s.l.) at a specific site of the upper individual tree of a certain tree species, at least 2 m tall. All the principal tree species in the Scandes are concerned, i.e. mountain birch (Betula pubescens ssp. czerepanovii), Norway spruce (Picea abies) and Scots pine (Pinus sylvestris).

    Paper I deals with regional treeline dynamics at more than 100 sites over the past 100 years. Concurrent with temperature rise by c. 1.4 °C over the same period, maximum treeline advances of all species amount to about 200 m. Thus, under ideal conditions, treelines respond in close equilibrium with air temperature evolution. However, over most parts of the landscape, treeline upshifts have been much smaller than 200 m, which relates to the combined action of geomorphology, wind, snow distribution and soil depth. After 1975, the birch has lost its role as the most rapidly advancing tree species, being superseded by pine and spruce.

    Paper II is a short-term (2005/2007-2010/2011) study of mountain birch treeline performance along a regional maritimity-continentality gradient. Upshift by 3.0 yr-1 in the maritime part of the gradient contrasts to retreat by 0.4 m yr-1 in the continental part. In the latter area, earlier and more complete melting of late-lying snow patches has seemingly progressed to a state when soil drought sets back the vigour of existing birches and precludes sexual regeneration and upslope advance of the treeline. In the maritime area, extensive and deep snow packs still exist above the treeline and constrain its position, although some release is taking place in the current warm climate.

    Paper III explores treeline change by phenotypic transformation of old-established stunted and prostrate spruce individuals (krummholz) growing high above the treeline and is based on analyses of radiocarbon-dated megafossils, preserved in the soil underneath clonal groups of spruce. Living spruce clones, which in some cases may date back to the early Holocene (9500 cal. yr BP), suggests that spruce immigrated from “cryptic” ice age refugia much closer to Scandinavia than conventionally thought. As the krummholz form presupposes open and windy habitats, it is inferred that permanently open spots prevailed in the high-mountain landscape even during periods when treelines in general were much higher than today.

    Paper IV reports radiocarbon dates of wood samples, retrieved from newly exposed glacier forefields at three main sites, located high above the modern treelines and embracing the entire Swedish Scandes. It appears that pine colonized early emerging nunataks already during the Late Glacial. Around 9600-9500 cal. yr BP a first massive wave of tree establishment, birch and pine, took place in “empty” glacier cirques. Both species grew 400-600 m above their present day treeline position and accordingly, the summer temperatures may have been 3.5 °C warmer than present (uncorrected for land uplift). During the entire interval 9600 to 4400 cal. yr BP, birch prospered 100-150 m above the uppermost pines. In response to Neoglacial cooling, treelines of both birch and pine descended until their final disappearance from the record 4400 and 5900 cal. yr BP, respectively. Thereafter, these habitats experienced increased snow accumulation and glacier inception.

  • 21559.
    Öberg, Lisa
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics.
    Treeline dynamics in short and long term perspectives: observational and historical evidence from the southern Swedish Scandes2010Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    Against the background of past, recent and future climate change, the present thesis addresses elevational shifts of alpine treelines in the Swedish Scandes. By definition, treeline refers to the elevation (m a.s.l.) at a specific site of the upper trees of a specific tree species, at least 2 m tall.

    Based on historical records, the first part of the thesis reports and analyzes the magnitude of treeline displacements for the main trees species (Betula pubescens ssp. czerepanovii, Picea abies and Pinus sylvestris) since the early 20th century. The study covered a large and heterogeneous region and more than 100 sites. Concurrent with temperature rise by c. 1.4 °C over the past century, maximum treeline advances of all species amount to about 200 m. That is virtually what should be predicted from the recorded temperature change over the same period of time. Thus, it appears that under ideal conditions, treelines respond in close equilibrium with air temperature evolution. However, over most parts of the landscape, conditions are not that ideal and treeline upshifts have therefore been much smaller. The main reason for that discrepancy was found to be topoclimatic constraints, i.e. the combined action of geomorphology, wind, snow distribution, soil depth, etc., which over large parts of the alpine landscape preclude treelines to reach their potential thermal limit.

    Recorded treeline advance by maximum 200 m or so over the past century emerges as a truly anomalous event in late Holocene vegetation history.

    The second part of the thesis is focused more on long-term changes of treelines and one specific and prevalent mechanism of treeline change. The first part of the thesis revealed that for Picea and Betula, treeline shift was accomplished largely by phenotypic transformation of old-established stunted and prostrate individuals (krummholz) growing high above the treeline. In obvious response to climate warming over the past century, such individuals have transformed into erect tree form, whereby the treeline (as defined here) has risen. As a means for deeper understanding of this mode of positional treeline change, extant clonal spruces, growing around the treeline, were radiocarbon dated from megafossil remains preserved in the soil underneath their canopies. It turned out that Picea abies in particular may attain almost eternal life due to its capability for vegetative reproduction and phenotypic plasticity. Some living clones were in fact inferred to have existed already 9500 years ago, and have thus persisted at the same spot throughout almost the entire Holocene. This contrasts with other tree species, which have left no living relicts from the early Holocene, when they actually grew equally high as the spruce. Thereafter they retracted by more than 300 m in elevation supporting that also on that temporal scale, treelines are highly responsive to climate change.

    The early appearance of Picea in the Scandes, suggests that Picea “hibernated” the last glacial phase much closer to Scandinavia than earlier thought. It has also immigrated to northern Sweden much earlier than the old-established wisdom.

    The experiences gained in this thesis should constitute essential components of any model striving to the project landscape ecological consequences of possible future climate shifts.

  • 21560.
    Öberg, Lisa
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Trädgränsdynamik på Sånfjället2002In: Svensk Botanisk Tidskrift, ISSN 0039-646X, Vol. 96, no 3/4, 177-185 p.Article in journal (Other scientific)
  • 21561.
    Öberg, Lisa
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics.
    Trädgränsen som indikator för ekologiska klimateffekter i fjällen: En metodstudie för långsiktig miljöövvervakning.2008Report (Other academic)
    Abstract [sv]

    Kunskap om trädens svar på dokumenterade klimatändringar ger indikationer om var och med vilken frekvens framtida miljöövervakningsinsatser beträffande trädgränsvegetationen bör koncentreras. Som ett viktigt komplement till den regionala trädgränsövervakningen och för att ge en totalbild av klimatets effekter på hela ekosystemet föreslås även ett objekt lämpligt för detaljerad strikt lokal övervakning (monitoring) av träd- och fältskiktsvegetationen. På så sätt skapas en mer fördjupad förståelse av de ekologiska mekanismer som orsakar de förändringar som dokumenteras i fjällandskapet. Omfattande landskapsekologiska förändringar, bl.a. stigande artgränser och förändrade utbredningsmönster för olika växtarter pågår idag i Jämtlands- och Dalafjällen. Den klimatuppvärmning som konstaterats under 1900-talet och fram till idag framstår som den främsta anledningen till fjällandskapets pågående omvandling. Trädgränserna för fjällbjörk, gran och tall har avancerat inom hela det undersökta området, både fenotypiskt (tillväxt) och genotypiskt (nyetablering). Trenden är tydlig med vissa regionala och artspecifika skillnader. Förändringar av trädgränsens läge har tidigare visat sig indikera även förskjutningar av andra arters utbredningsgränser när klimatet och andra geoekologiska förutsättningar som t.ex. snöförhållanden, vegetationsperiodens längd och markfuktighet förändras. Ett viktigt resultatav projektet är att trädgränsen svarar på klimatets förändring direkt och utan nämnvärt dröjsmål (jfr. Kullman 2007, in press). Detta understryker dess styrka och användbarhet som miljöövervakningsindikator för klimatändringars ekologiska effekter på vegetationen i fjällen. Trädgränsens dynamik har också ett stort pedagogiskt värde, eftersom den är lätt identifierbar och förändringar av trädgränsens läge i fjällandskapet är lätta att förstå och visualisera.

  • 21562.
    Öberg, Lisa
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Trädgränsprojektet - lägesrapport 20062007Report (Other scientific)
  • 21563.
    Öberg, Lisa
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Kullman, L.
    Fjällvärld i förvandling - klimatförändringens effekter på fjällens växtliv2006In: Jämten, Östersund: Jamtli förlag , 2006, 83-91 p.Chapter in book (Other scientific)
  • 21564.
    Öberg, Lisa
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics.
    Kullman, Leif
    Institutionen för ekologi, miljö och geovetenskap, Umeå universitet.
    Ancient subalpine clonal spruces (Picea abies) – sources of postglacial vegetation history in the Swedish Scandes2011In: Arctic, ISSN 0004-0843, E-ISSN 1923-1245, Vol. 64, no 2, 183-196 p.Article in journal (Refereed)
    Abstract [en]

    This study addresses the long-standing issue of postglacial immigration of Picea abies (Norway spruce) into Scandinavia. Methodologically, the main focus is on megafossil tree remains (wood and cones) of spruce and other species, retrieved from the treeline ecotone (Swedish Scandes), as a tool for vegetation reconstruction. Radiocarbon dating of megafossils, preserved in the soil underneath layering clonal groups of Picea abies, provide the core data. Living spruce clones, with in some cases likely continuity back to the early Holocene (9500 cal. yr BP onwards), were found at high-elevations. First postglacial arrival to the Swedish Scandes at this stage concurs with previous megafossil inferences. This is several millennia earlier than inferred from pollen data and very soon after regional deglaciation. Persistence of some individual Picea clones since the early Holocene thermal optimum and up to the present is indicative of permanently open or semi-open spots in the high-mountain landscape, also at times when treelines in general were much higher than present. Initially, Picea clones appear to have existed in a regional no-analogue vegetation matrix of widely scattered pine (Pinus sylvestris), mountain birch (Betula pubescens ssp. czerepanovii), Siberian larch (Larix sibirica) and thermophilic broadleaved deciduous species. In response to subsequent neoglacial cooling, the alpine character of the landscape has been enhanced through a lowered pine treeline and disappearance of larch and thermophiles. Spruces, which escaped fire and other calamities, endured due to their inherent phenotypic plasticity. Increasing climatic harshness throughout the Holocene conserved them as crippled krummholz, protected from winter stress by almost complete snow coverage. Appearance of Picea abies exclusively in the west, shortly after the deglaciation, could suggest that it has immigrated from “cryptic” ice age refugia much closer to Scandinavia than conventionally thought.

  • 21565.
    Öberg, Lisa
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of applied science and design.
    Kullman, Leif
    Institutionen för ekologi, miljö och geovetenskap, Umeå universitet.
    Contrasting short-term performance of mountain birch (Betula pubescens ssp. czerepanovii) treeline along a latitudinal continentality-maritimity gradient in the southern Swedish Scandes2012In: Fennia, ISSN 0015-0010, Vol. 190, no 1, 19-40 p.Article in journal (Refereed)
    Abstract [en]

    Positional treeline shift is a fundamental aspect and indicator of high-mountain vegetation response to climate change. This study analyses treeline performance during the period 2005/2007 -2010/2011 in the Swedish Scandes. Focus is on mountain birch (Betula pubescens ssp. czerepanovii) along a regional climatic maritimity-continentality gradient. Treeline upshift by 3.0 yr-1 in the maritime part differed significantly from retreat by 0.4 m yr-1 in the continental part of the transect. This discrepancy is discussed in terms of differential warming-induced snow cover phenology patterns and their influence on soil moisture conditions. In the continental area, earlier and more complete melting of prior relatively rare late-lying snow patches, even high above the treeline, has progressed to a state when melt water irrigation ceases. As a consequence, soil drought sets back the vigor of existing birches and precludes sexual regeneration and upslope advance of the treeline. In the maritime area, extensive and deep snow packs still exist above the treeline and constrain its position, although some release is taking place in the current warm climate. Thereby, the birch treeline expands upslope as the alpine snow patches shrink, but continue to provide sufficient melt water throughout the summer. Treeline rise appears to have been based primarily on seed regeneration over the past few decades. This is a novelty, since prior (1915-2007) treeline advance was accomplished mainly by in situ shifts in growth form of relict krummholz birches, in some cases millennial-old, prevailing above the treeline. By the snow phenology mechanism, birch can benefit from climate warming in the maritime region, which contrasts with the situation in the continental region. This discrepancy should be accounted for in projective models. In a hypothetical case of sustained warming, the subalpine birch forest belt may expand less extensively than often assumed, although advance may continue for some time in snow rich maritime areas.

  • 21566.
    Öberg, Lisa
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of applied science and design.
    Kullman, Leif
    Umeå University, Department of Ecology and Environmental Science, SE 90187 Umeå.
    Recent Glacier Recession – a New Source of Postglacial Treeline and Climate History in the Swedish Scandes2012In: Landscape Online, ISSN 1865-1542, E-ISSN 1865-1542, Vol. 26, 1-38 p.Article in journal (Refereed)
    Abstract [en]

    Climate warming during the past century has imposed recession of glaciers and perennial snow/ice patches along the entire Swedish Scandes. On the newly exposed forefields, subfossil wood remnants are being outwashed from beneath ice and snow bodies. In Scandinavia, this kind of detrital wood is a previously unused source of postglacial vegetation and climate history. The present study reports radiocarbon dates of a set of 78 wood samples, retrieved from three main sites, high above modern treelines and stretching along the Swedish Scandes. In accord with previous studies, pine (Pinus sylvestris) colonized early emerging nunataks already during the Late Glacial. Around 9600-9500 cal. yr BP a first massive wave of tree establishment, birch and pine, took place in "empty" glacier cirques. Both species grew 400-600 m above their present-ay treeline position and the summer temperatures may have been 3.5 °C warmer than present. In respons to Neoglacial cooling, treelines of both birch and pine descended until their final disappearance from the record 4400 and 5900 cal. yr BP, respectively. During the entire interval 9600 to 4400 cal. yr BP, birch prospered in a 100-150 broad belt above the uppermost pines. The recent emergence of tree remnants in the current habitats relates to the contemporary episode of climate warming, possibly unprecedented for several past millennia. It is inferred, by an anology with the past, that in a future scenario with summers 3.5 ° warmer than present, the birch treeline may rise by 600 m or so.

  • 21567.
    Öberg, Michael
    Mid Sweden University, Faculty of Human Sciences, Department of Social Sciences.
    Förvaltningen och verkligheten: Ett implementeringsperspektiv på verkställigheter av utvisningsdomar i brottmål2008Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

     

    I det föreliggande arbetet undersöks dels huruvida verkställigheten av domstolsbeslut gällande utvisning med återreseförbud omgärdas av några implementeringsproblem, dels av vilken karaktär dessa är och ur vad de är sprungna. Undersökningen, som är inom ramarna för det som brukar kallas policyanalys, sker med utgångspunkt i en teoretisk modell som tar hänsyn till tre olika typer av generella villkor som måste vara uppfyllda för att en lyckad implementering av ett överordnat beslut skall kunna sägas vara för handen. Studien bygger på en numerär genomgång av alla utvisningsärenden  som handlagts av Polismyndigheten i Västernorrlands län under en femårsperiod, samt på intervjuer med tillämpare på olika nivåer. Syftet med arbetet är att svara på frågorna: finns implementeringsproblem i den studerade kontexten? Om så är fallet, vilken karaktär har problemen och vad är det som gör att de uppstår?

     

  • 21568.
    Öberg, Petra
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Psykisk ohälsa hos äldre, hur påverkar fysisk aktivitet?Personalens upplevelser.2017Independent thesis Advanced level (degree of Master (Two Years)), 10 credits / 15 HE creditsStudent thesis
  • 21569.
    Öberg, Sandra
    Mid Sweden University, Faculty of Human Sciences, Department of Education.
    Fostran: En kvalitativ studie om tre pedagoger och fyra föräldrars syn på olika aspekter av fostran2013Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
  • 21570.
    Öberg, Sophia
    et al.
    Mid Sweden University, Faculty of Human Sciences, Department of Social Work.
    Wikberg, Linda
    Mid Sweden University, Faculty of Human Sciences, Department of Social Work.
    Kvinnojourers arbete med våldsutsatta äldre kvinnor – en kvalitativ enkätundersökning2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 21571.
    Öblom, Rosanna
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Egenvårdsstrategier för personer med högt blodtryck.2013Independent thesis Basic level (degree of Bachelor), 180 HE creditsStudent thesis
    Abstract [sv]

    Bakgrund: 1 miljard människor världen över lider av hypertoni. Det är en kronisk folksjukdom som påtagligt bidrar till olika kardiovaskulära följdsjukdomar. Med effektiv blodtrycksbehandling kan man minska sjukligheten, dödligheten och även de följdsjukdomar som uppkommer. I samband med följdsjukdomar spelar egenvård en central roll. Syfte: Belysa egenvårdsstrategier för personer med högt blodtryck. Metod: Litteraturöversikt gjordes av 14 vetenskapliga artiklar som söktes i databaserna PubMed och Cinahl. Dessa granskades genom fyra urval och bildade sedan fyra kategorier. Resultat: Det visade sig att goda egenvårdsstrategier så som kost, fysisk aktivitet, viktnedgång, saltreduktion och stresshantering kan sänkta blodtrycket avsevärt. Diskussion: Det kan vara svårt att bibehålla livsstilsförändringar för patienten. Då är det sjuksköterskans uppgift att ge råd och stöd för att motivera personen i sina livsstilsförändringar och egenvårdsstrategier. Slutsatser: De två största egenvårdsstrategier som sänker blodtrycket är kost och fysisk aktivitet.

  • 21572.
    Öblom, Rosanna
    Mid Sweden University, Faculty of Human Sciences, Department of Nursing Sciences.
    Egenvårdsstrategier för personer med högt blodtryck2013Independent thesis Basic level (degree of Bachelor), 180 HE creditsStudent thesis
    Abstract [sv]

    Bakgrund: 1 miljard människor världen över lider av hypertoni. Det är en kroniskfolksjukdom som påtagligt bidrar till olika kardiovaskulära följdsjukdomar. Med effektivblodtrycksbehandling kan man minska sjukligheten, dödligheten och även deföljdsjukdomar som uppkommer. I samband med följdsjukdomar spelar egenvård encentral roll. Syfte: Belysa egenvårdsstrategier för personer med högt blodtryck. Metod:Litteraturöversikt gjordes av 14 vetenskapliga artiklar som söktes i databaserna PubMed ochCinahl. Dessa granskades genom fyra urval och bildade sedan fyra kategorier. Resultat: Detvisade sig att goda egenvårdsstrategier så som kost, fysisk aktivitet, viktnedgång,saltreduktion och stresshantering kan sänkta blodtrycket avsevärt. Diskussion: Det kanvara svårt att bibehålla livsstilsförändringar för patienten. Då är det sjuksköterskans uppgiftatt ge råd och stöd för att motivera personen i sina livsstilsförändringar ochegenvårdsstrategier. Slutsatser: De två största egenvårdsstrategier som sänker blodtrycketär kost och fysisk aktivitet.

  • 21573.
    Ödliing, Gunvor
    et al.
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Danielson, E
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Borup, S
    Norberg, A
    Personalens syn på bröstcancer och omvårdnad av kvinnor som opererats för bröstcancer.: Paper presenterat vid Årligt möte för psykosocial forskning om bröstcancer, Karolinska sjukhuset i Stockholm.1997Conference paper (Other scientific)
  • 21574.
    Ödling, Gunvor
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Omvårdnadshandledning.: Medverkan i symposium - Professionell växt genomhandledning. 5:e Kirurgveckan i Östersund 21-25 aug.2000Conference paper (Other academic)
  • 21575.
    Ödling, Gunvor
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Professional caregivers' experiences of caring for women with breast cancer on a surgical ward2004Doctoral thesis, monograph (Other scientific)
  • 21576.
    Ödling, Gunvor
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Screeningupptäckta bröstcancerpatienters väg genom vårdkedjan.2000Conference paper (Other academic)
  • 21577.
    Ödling, Gunvor
    et al.
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Axelsson, Karin
    Norberg, Astrid
    Umeå universitet. Institutionen för omvårdnad.
    Upplevelser i samband med operation av nyupptäckt bröstcancer1995In: Vård i Norden, ISSN 0107-4083, Vol. 15, no 1, 14-18 p.Article in journal (Refereed)
  • 21578.
    Ödling, Gunvor
    et al.
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Danielson, Ella
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Borup Christensen, Svend
    Caring for women with recurrent breast cancer- care givers´ descriptions in connection with supervision sessions at a surgical ward.: The 11th Annual Scientific Meeting of the European Association for Cancer Education, Warzawa1998Conference paper (Other scientific)
  • 21579.
    Ödling, Gunvor
    et al.
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Danielson, Ella
    Borup Christensen, Svend
    Norberg, Astrid
    Umeå universitet. Institutionen för omvårdnad.
    Living with breast cancer: Care givers´ perceptions in a surgical ward1998In: Cancer Nursing, ISSN 0162-220X, Vol. 21, no 3, 187-195 p.Article in journal (Refereed)
    Abstract [en]

    Caring for women with breast cancer has potential for increasing care giver distress and anxiety. Knowledge of the threats implicit in the disease and treatment as well as overidentification with the patient form the basis for this outcome. In order to describe perceptions of breast cancer as an illness, semistructured interviews were carried out with 37 care givers at a surgical department. The interviews were tape-recorded and transcribed verbatim. An analysis was then carried out of the stories told by the care givers about breast cancer as an illness. The results indicated that breast cancer as an illness gave rise to predominantly negative and dark associations among the care givers. Their experiences of caring for women in critical stages of the illness over many years appear to have had a negative influence on them. Death itself, and even more so the process leading to the end, were very tangible in their stories. The article concludes that care givers on a surgical ward have a fragmented picture of the patients and need to be given opportunities to follow the total care process. Those care givers who were able to follow the women's stages of illness throughout more often had a positive picture.

  • 21580.
    Ödling, Gunvor
    et al.
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Danielson, Ella
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Borup, S
    Norberg, A
    Umeå universitet.
    Care givers´ perceptions of nursing care and support to women with breast cancer. The 10th Annual Scientific Meeting of the European Association for Cancer Education, Bryssel.1997Conference paper (Other scientific)
  • 21581.
    Ödling, Gunvor
    et al.
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Danielson, Ella
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Borup, S
    Norberg, Astrid
    Umeå universitet.
    Personalens beskrivning av sin syn på bröstcancer och omvårdnaden av kvinnor som opererats för bröstcancer. FoU- Konferens anordnad av Jämtlands läns landsting och Mitthögskolan i Östersund.1996Conference paper (Other scientific)
  • 21582.
    Ödling, Gunvor
    et al.
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Danielson, Ella
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Jansson, Lilian
    Umeå universitet. Institutionen för omvårdnad.
    Caregivers´ descriptions of patients with advanced breast cancer in connection with supervision sessions in a surgical ward2001In: Cancer Nursing, ISSN 0162-220X, E-ISSN 1538-9804, Vol. 24, no 1, 28-34 p.Article in journal (Refereed)
    Abstract [en]

    The purpose of this study was to describe the content of caregivers' (health care professionals') presentation of care situations as told at supervision sessions. For 1 year, 21 caregivers in a surgical ward of a county hospital in the middle of Sweden participated in a clinical supervision session 2 hours every third week. The participants in the supervision sessions were divided so as to form three mixed groups composed of registered nurses, practical nurses, physiotherapists, and physicians. The purpose of the supervision sessions was to give caregivers the opportunity to reflect on different care situations in a way that contributed to the development of patient care. The 38 supervision sessions were tape-recorded and transcribed verbatim. The transcripts were analyzed using a qualitative content analysis. The caregivers described difficult care situations focusing on the feelings of patients, relatives, and caregivers, with an emphasis on the caregivers' being dominant. Difficult care situations were described as giving caregivers feelings of discomfort, powerlessness, and reduced self-esteem. These feelings were described as arising in connection with caring for women with advanced breast cancer and other seriously ill patients in an organization lacking clear goals and rules. This study found that supervision sessions offering an opportunity to reflect on the difficult care situations are important for caregivers. These sessions seem therefore to be of vital importance for the future development of cancer care on the surgical ward.

  • 21583.
    Ödling, Gunvor
    et al.
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Danielson, Ella
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Jansson, Lilian
    Umeå universitet. Institutionen för omvårdnad.
    Obstacles to good nursing care of women with breast cancer care givers´ descriptions in connection with supervision sessions at a surgical ward2000In: Journal of Cancer Education, ISSN 0885-8195, Vol. 15, no 3Article in journal (Refereed)
  • 21584.
    Ödling, Gunvor
    et al.
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Norberg, Astrid
    Institutionen för omvårdnad, Umeå universitet.
    Danielson, Ella
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences. Göteborgs universitet.
    Care of women with breast cancer on a surgical ward: Nurses' opinions of the need for support for women, relatives and themselves2002In: Journal of Advanced Nursing, ISSN 0309-2402, E-ISSN 1365-2648, Vol. 39, no 1, 77-86 p.Article in journal (Refereed)
    Abstract [en]

    BACKGROUND: In Sweden women with newly diagnosed breast cancer are admitted to surgical wards in order to undergo surgery and receive postoperative care. On these wards, nursing staff take care of women both with newly diagnosed breast cancer and those with cancer in advanced stages. Nurses have to meet the varying needs of patients and their relatives. AIM: To describe nurses' opinions of the need for care and support for women and their relatives in connection with surgery for breast cancer, as well as their own need for support on a surgical ward. METHODS: Thirty-one nurses from a surgical ward participated in semi-structured interviews. The interviews were tape-recorded and transcribed verbatim. Thereafter a step-by-step, qualitative content analysis was carried out. RESULTS: The nurses described the need to talk and receive information as being the most important among women and their relatives, as well as among themselves. Only a few nurses mentioned the need for physical care among the women. Contact with relatives was described as being almost nonexistent. There was a discrepancy between what nurses described as important needs and how these needs were provided for. CONCLUSION: This study shows that what the nurses described as being the most important needs, and the way how these needs were provided for, was more often seen from a theoretical point of view with few examples of self-experienced situations in the daily care. Needs among women and their relatives seemed to be not fully known to nurses and therefore, possibly, were not met. Nurses themselves had a pronounced need for support, which was sometimes unsatisfactorily met.

  • 21585.
    Ödmalm, Alvina J
    Mid Sweden University, Faculty of Human Sciences, Department of Education.
    En genusbaserad läromedelsanalys av valda delar i läroboken: Söka svar Religionskunskap kurs 1 och 22015Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
  • 21586.
    Ödqvist, Caroline
    Mid Sweden University, Faculty of Human Sciences, Department of Psychology.
    Kan man mäta autistiska drag med taktil respons: En kvasiexperimentell pilotstudie2014Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
  • 21587.
    Ögren, Anna
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Science Education and Mathematics.
    Matte på ett främmande språk: En studie om matematikundervisning för elever med svenskasom andraspråk.2017Independent thesis Advanced level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Vi har på de flesta platser idag en mångkulturell skola som en följd av den ökade invandringen. Mätningar visar att elever med utländsk härkomst är överrepresenterade när det kommer till att intenå målet godkänt i ämnet matematik. Syftet med denna studie är att undersöka hur pedagoger igrundskolans år 1–3 arbetar med matematikundervisningen för elever med svenska som andraspråk.Jag vill undersöka om och hur undervisningen i matematik anpassas till nyanlända elever medsvenska som andraspråk. För att besvara mina frågeställningar har jag valt att utföra kvalitativaintervjuer av sju lärare. Resultatet i studien visar att det finns stora brister i hur kartläggningen avelevernas förkunskaper fungerar och hur resultatet av kartläggningen tas om hand och används.Lärarna vet inte om eleverna är kartlagda eller ej och om de är det har de inte fått tagit del av detresultatet, vilket leder till att kartläggningen inte fyller den funktion den syftar till. Informanterna seratt deras andraspråkselever möter svårigheter i matematikundervisningen på grund av att derasspråkkunskaper inte räcker till. Informanterna beskriver att eleverna klarar rena algoritmer bra menatt de får problem när det kommer till läs-uppgifter eller problemlösningsuppgifter. En stor brist somkommer fram i min studie är att samarbetet och dialogen mellan de berörda pedagogerna i dennyanlända elevens undervisning saknas. Övervägande av informanter uppger att de helt saknarsamarbete med modersmålslärare och SVA-lärare. Min slutsats av denna studie blir att skolorna intelyckas anpassa sin undervisning i ämnet matematik till elever med svenska som andraspråk. Detsaknas rutiner, samarbete och resurser för att vi ska kunna säga att vi erbjuder dessa elever enlikvärdig utbildning som är anpassad efter deras förutsättningar och behov.

  • 21588.
    Ögren, Helén
    Mid Sweden University, Faculty of Human Sciences, Department of Social Work.
    Skapande verksamhet i socialt arbete En översiktsanalys2014Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Tidigare forskning om skapande verksamhet i socialt arbete berör ofta bara en form av skapande, riktad till en specifik målgrupp som exempelvis konst eller trädgårdsodling för gruppen psykisk ohälsa eller teater för gruppen funktionshindrade. Denna studie syftar till att undersöka hur skapande verksamhet, oavsett form fungerar som metod i socialt arbete.

    Skapande verksamhet i socialt arbete, är en kvalitativ studie som bygger på deltagares upplevelser av att använda sig av skapande metoder, inom det sociala arbetets verksamhetsfält.

    Studiens teori utgår ifrån analysmetoden grounded theory och bygger på intervjumaterial ifrån fyra fokusgrupper som representerar olika sociala verksamheter i Sverige.

    Bättre självförtroende, identitetsskapande och lättare integration i samhället är några av slutsatserna som presenteras.

  • 21589.
    Ögren, Tsuyu
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Regulatory Inspectors and their Work Environment: A Thematic Analysis2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 21590.
    Öhgren, Jens
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Media and Communication Science.
    Johansson, Catrin
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Media and Communication Science.
    Sociala intranät för kommunikation och lärande: En studie av Svenska Spels intranät Hemmaplan2014Report (Other academic)
    Abstract [sv]

    Sociala medier har blivit ett allt vanligare verktyg för internkommunikation i organisationer, men kunskapen om vilka konsekvenser, risker och möjligheter som sociala intranät medför är hittills begränsad. Forskning visar att sociala medier låter användareuttrycka sig och bidrar till effektivare kommunikation, förbättrade samarbeten, ökadtransparens och minskade hierarkier. Med denna studie ämnar vi undersöka vilken nytta sociala intranät skapar utifrån hur användare uppfattar dess värde, inverkan på organisationskulturen, samt vilka kommunikativa problem som eventuellt skapas och klaras upp.För att uppfylla studiens syfte har vi genom fokusgruppintervjuer och en webbenkät undersökt medarbetares och chefers uppfattningar om Svenska Spels intranät Hemmaplan. Resultatet visar att olika användare uppfattar och använder intranätet på olika sätt. Ifokusgruppintervjuerna visade det sig att vissa användare ser intranätet som ett kommunikationsverktyg som underlättar interaktionen med kollegor och delaktighet i organisationen, medan andra främst ser intranätet som en informationskälla. Detta styrks av enkätundersökningen, som även visade att vissa användare vill att det händer mycket på intranätet och att det ska finnas mycket information tillgänglig. De vill självakunnabestämma vad de vill läsa om och ta del av. Andra användare föredrar ett snabb-konsumerat intranät som har lättillgänglig, kvalitativ och relevant information, vilket visade sigbåde i fokusgruppintervjuerna och i webbenkäten.De slutsatser vi kandra från undersökningenär att respondenterna överlag ser de sociala attributen i intranätet som mer positiva än negativa. De beskriver att intranätet gjort användarna, såväl medarbetare som chefer,mer synliga och att det förs en bättre dialog inom organisationen.Att överlåta mycket kontroll och ansvar till redaktörer ute i organisationen har varit lyckat och gjort att Svenska Spel har kommit en bra bit på vägen för att göra intranätet till ett verktyg för dialog och meningsskapande i organisationen. DetSvenska Spelframför allt bör fokusera på i fortsättningen är att öka engagemanget bland chefer och redaktörer för att ytterligare förstärka de positiva effekter Hemmaplan ger i organisationen.De viktigaste rekommendationerna till Svenska Spel är:•Tydliggör syftet med Hemmaplan och tanken med de olika funktionerna. •Gör ett vägval när det gäller privat ellerarbetsrelaterat innehåll. •Skapa översikter och rubriker för de som har svårt att överblicka innehållet.•Ge viktig information en speciell plats.•Skapa utrymme för enhets- och avdelningsinformation. •Lägg in mer information om mål, resultat och medarbetare.•Kartlägg behoven av Hemmaplan hos Kasinopersonalen.•Uppmuntra kritiska synpunkter. •Möjliggör personlig anpassning av startsidan.

  • 21591.
    Öhlund, Mikael
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Metodutvärdering av ett implementationsprojekt: En leverantörs perspektiv på en implementationsmetod för affärssystem2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Affärssystem är idag mer aktuellt än tidigare. Ett affärssystem automatiserar en verksamhets kärnaktiviteter såsom produktion, Human Resources, bokföring och redovisning, och leverantörshantering genom användandet av Best Practice för att möjliggöra snabbare och effektivare beslutstagande, kostnadsminskning och ge en bättre styrning av verksamheten. Att införa ett affärssystem kan medföra fördelar såväl som nackdelar för verksamheten om införandet eller implementationen inte blir lyckad. Det finns ett flertal metoder utvecklade för att assistera under implementationen av ett affärssystem varav en av dessa har undersökts. Arbetet har genomförts med hjälp av datainsamling följt av empiriska iakttagelser. Genom fallstudien undersöktes hur väl implementationsmetoden har agerat stödjande för studieprojektet. Fallstudien genomfördes genom telefonintervjuer med personer som är väl insatta i projektet på övergripande nivå. Informanternas åsikter visar på att det finns områden där metoden inte har tagit hänsyn i undersökningen. Dessa områden är att inte ta hänsyn till klientens förväntingar på systemet, misslyckas med att höja klientens kompetens tidigt, klientnatur, upphandlingsnatur och organisationsstruktur. Utifrån detta identifierades två separata huvudområden: Metodspecifika- och klientspecifika problem. Problemen som har existerat i studieprojektet härrör inte endast metoden Ascendant for SAP utan till stor del den specifika klienten.

  • 21592.
    Öhlund, Thomas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of applied science and design.
    Coated Surfaces for Inkjet-Printed Conductors2012Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    In this thesis, a number of commercially available paper substrates of various types are characterized and their characteristics related to the performance of inkjet-printed conductors using silver nanoparticle ink. The evaluated performance variables are electrical conductivity as well as the minimum achievable conductor width and the edge raggedness. It is shown that quick absorption of the ink carrier is beneficial for achieving well defined conductor geometry and high conductivity. Surface roughness with topography variations of sufficiently large amplitude and frequency is detrimental to print definition and conductivity. Porosity is another important factor, where the characteristic pore size is much more important than the total pore volume. A nearly ideal porous coating has large total pore volume but small characteristic pore size, preferably smaller than individual nanoparticles in the ink. Apparent surface energy is important for non-absorbing substrates but of limited importance for coatings with a high absorption rate.Additionally, a concept for improving the geometric definition of inkjet-printed conductors on nonporous films has been demonstrated. By coating the films with polymer–based coatings to provide a means of ink solvent removal, minimum conductor width were reduced a factor 2 or more.Intimately connected to the end performance of printed conductors is a well adapted sintering methodology. A comparative evaluation of a number of selective sintering methods has been performed on paper substrates with different heat tolerance. Pulsed high-power white light was found to be a good compromise between conductivity performance, reliability and production adaptability.The purpose of the work conducted in this thesis is to increase the knowledge base in how surface characteristics of papers and flexible films affect performance of printed nanoparticle structures. This would improve selection, adaption of, or manufacturing of such substrates to suit printed high conductivity patterns such as printed antennas for packaging.

  • 21593.
    Öhlund, Thomas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Metal Films for Printed Electronics: Ink-substrate Interactions and Sintering2014Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    A new manufacturing paradigm may lower the cost and environmental impact of existing products, as well as enable completely new products. Large scale, roll-to-roll manufacturing of flexible electronics and other functionality has great potential. However, a commercial breakthrough depends on a lower consumption of materials and energy compared with competing alternatives, and that sufficiently high performance and reliability of the products can be maintained. The substrate constitutes a large part of the product, and therefore its cost and environmental sustainability are important. Electrically conducting thin films are required in many functional devices and applications. In demanding applications, metal films offer the highest conductivity.

     

    In this thesis, paper substrates of various type and construction were characterized, and the characteristics were related to the performance of inkjet-printed metal patterns. Fast absorption of the ink carrier was beneficial for well-defined pattern geometry, as well as high conductivity. Surface roughness with topography variations of sufficiently large amplitude and frequency, was detrimental to the pattern definition and conductivity. Porosity was another important factor, where the characteristic pore size was much more important than the total pore volume. Apparent surface energy was important for non-absorbing substrates, but of limited importance for coatings with a high absorption rate. Applying thin polymer–based coatings on flexible non-porous films to provide a mechanism for ink solvent removal, improved the pattern definition significantly. Inkjet-printing of a ZnO-dispersion on uncoated paper provided a thin spot-coating, allowing conductivity of silver nanoparticle films. Conductive nanoparticle films could not form directly on the uncoated paper.

     

    The resulting performance of printed metal patterns was highly dependent on a well adapted sintering methodology. Several sintering methods were examined in this thesis, including conventional oven sintering, electrical sintering, microwave sintering, chemical sintering and intense pulsed light sintering. Specially designed coated papers with modified chemical and physical properties, were utilized for chemical low-temperature sintering of silver nanoparticle inks. For intense pulsed light sintering and material conversion of patterns, custom equipment was designed and built. Using the equipment, inkjet-printed copper oxide patterns were processed into highly conducting copper patterns. Custom-designed papers with mesoporous coatings and porous precoatings improved the reliablility and performance of the reduction and sintering process.

     

     

     

     

    The thesis aims to clarify how ink-substrate interactions and sintering methodology affect the performance and reliability of inkjet-printed nanoparticle patterns on flexible substrates. This improves the selection, adaptation, design and manufacturing of suitable substrates for inkjet-printed high conductivity patterns, such as circuit boards or RFID antennas.  

  • 21594.
    Öhlund, Thomas
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of applied science and design.
    Andersson, Mattias
    Mid Sweden University, Faculty of Science, Technology and Media, Department of applied science and design.
    Effect of Paper Properties on Electrical Conductivity and Pattern Definition for Silver Nanoparticle Inkjet Ink2012In: Proceedings of LOPE-C 2012, 2012, 115-119 p.Conference paper (Refereed)
    Abstract [en]

    In this work, electrical conductivity and print pattern definition isstudied for silver nanoparticle ink, printed on ten commerciallyavailable paper substrates. Interrelations and correlations betweenelectrical conductivity, print pattern definition and a set ofmeasured paper properties are analyzed with a multivariatestatistical method. The papers are characterized in terms ofabsorption rate, porosity, apparent surface energy, surfaceroughness and surface material content. The statistical analysisshows that electrical conductivity and print pattern definition arecorrelated. Conductivity and print definition are correlatedpositively with absorption rate and negatively with surfaceroughness. A model based on projection to latent structures (PLS) isbuilt from the measurement data, showing adequate values of modelfit and predictive ability. This suggests that the chosen propertiesand methods for surface characterization are relevant in estimatingoverall performance of inkjet-printed conductors on paper.Additionally, a qualitative examination of the nanoparticle layercharacteristic is conducted with SEM cross section microscopy.Some of the properties and mechanisms of importance to theconductivity of the printed conductors are highlighted, of whichsome are crucial for achieving conductivity. Physical characteristicsof a suitable paper surface should ideally include large absorptioncapability for the ink carrier, but most importantly, a characteristicpore size and surface roughness amplitude that are both smallcompared to the dry ink layer thickness. If these criteria are met,paper media can be a low cost, comparably high performancealternative for metal nanoparticle inks in printed electronics applications.

  • 21595.
    Öhlund, Thomas
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Hummelgård, Magnus
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Olin, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Sintering Inhibition of Silver Nanoparticle Films via AgCl Nanocrystal Formation2017In: Nanomaterials, ISSN 2079-4991, Vol. 7, no 8, 224Article in journal (Refereed)
    Abstract [en]

    Electrically conductive films are key components in most printed and flexible electronics applications. For the solution processing of conductive films, inks containing silver nanoparticles (AgNPs) remain important because of their relatively easy processing and generally low resistivity after a sintering procedure. Because the commonly used, moderate sintering temperatures of 150-300 °C are still too high for most low-cost flexible substrates, expanding the knowledge of surface-ink interactions that affect the sintering temperature is desirable. It is known that chloride ions can assist the sintering of AgNP films by displacing capping agents on the surfaces of AgNPs. However, very little is known about other possible Cl-AgNP interactions that affect the resistivity and no interaction having the opposite effect (sintering inhibition) has been identified before. Here we identify such a Cl-AgNP interaction giving sintering inhibition and find that the mechanism involves the formation of AgCl nanocrystals within the AgNP film. The AgCl formation was observed after inkjet-printing of AgNP inks with polyvinylpyrrolidone (PVP) as the capping agent onto papers with quick-absorbing coatings containing 0.3 wt % KCl. Our findings show that chloride can have opposite roles during sintering, either assisting or inhibiting the sintering depending on the prevalence of AgCl formation. The prevalence of AgCl formation depends on the absorption properties and the capping agent.

  • 21596.
    Öhlund, Thomas
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Schuppert, Anna
    Schoeller Technocell GmbH & Co KG, D-49086 Osnabruck, Germany.
    Andres, Britta
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Andersson, Henrik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Forsberg, Sven
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Schmidt, Wolfgang
    Schoeller Technocell GmbH & Co KG, D-49086 Osnabruck, Germany.
    Nilsson, Hans-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Andersson, Mattias
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Zhang, Renyun
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Olin, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Assisted sintering of silver nanoparticle inkjet inks on paper with active coatings2015In: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 5, 64841-64849 p.Article in journal (Refereed)
    Abstract [en]

    Inkjet-printed metal films are important within the emerging field of printed electronics. For large-scale manufacturing, low-cost flexible substrates and low temperature sintering is desired. Tailored coated substrates are interesting for roll-to-roll fabrication of printed electronics, since a suitable tailoring of the ink-substrate system may reduce, or remove, the need for explicit sintering. Here we utilize specially designed coated papers, containing chloride as an active sintering agent. The built-in sintering agent greatly assists low-temperature sintering of inkjet-printed AgNP films. Further, we examine the effect of variations in coating pore size and precoating type. Interestingly, we find that the sintering is substantially affected by these parameters.

  • 21597.
    Öhlund, Thomas
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Schuppert, Anna
    Institut Charles Gerhardt de Montpellier, France.
    Hummelgård, Magnus
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Bäckström, Joakim
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Nilsson, Hans-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Olin, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Inkjet Fabrication of Copper Patterns for Flexible Electronics: Using Paper with Active Precoatings2015In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 7, no 33, 18273-18282 p.Article in journal (Refereed)
    Abstract [en]

    Low-cost solution-processing of highly conductive films is important for the expanding market of printed electronics. For roll-to-roll manufacturing, suitable flexible substrates and compatible postprocessing are essential. Here, custom-developed coated papers are demonstrated to facilitate the inkjet fabrication of high performance copper patterns. The patterns are fabricated in ambient conditions using water-based CuO dispersion and intense pulsed light (IPL) processing. Papers using a porous CaCO3 precoating, combined with an acidic mesoporous absorption coating, improve the effectiveness and reliability of the IPL process. The processing is realizable within 5 ms, using a single pulse of light. A resistivity of 3.1 ± 0.12 μΩ·cm is achieved with 400 μm wide conductors, corresponding to more than 50% of the conductivity of bulk copper. This is higher than previously reported results for IPL-processed copper.

  • 21598.
    Öhlund, Thomas
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Örtegren, Jonas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Andersson, Henrik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Nilsson, Hans-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Sintering Methods for Metal Nanoparticle Inks on Flexible Substrates2009In: NIP 25: DIGITAL FABRICATION 2009, TECHNICAL PROGRAM AND PROCEEDINGS, The Society for Imaging Science and Technology, 2009, 614-617 p.Conference paper (Refereed)
    Abstract [en]

    In this paper a number of selective sintering methods suitable for inkjet printed nanoparticles are demonstrated on two different coated papers. The selective methods demonstrated here are electric current heating, microwave sintering and photonic curing. As a reference, conventional heat chamber sintering is also included. Conductivity measurements and studies of sintered structures with optical and scanning electron microscopy are performed, as well as a qualitative evaluation of how the heat-sensitive substrates are affected. The purpose is to analyze characteristics of each method and gain insight in how different process parameters affect overall performance and reliability. With heat chamber sintering the best achievable conductivity without substrate deformation corresponded to less than 20% of pure silver. With some selective methods, conductivity reached well above 50% of pure silver.

     

     

  • 21599.
    Öhlund, Thomas
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Örtegren, Jonas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Andersson, Henrik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Nilsson, Hans-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    The importance of surface characteristics for structure definition of silver nanoparticle ink patterns on paper surfaces2010In: NIP26 and Digital Fabrication, Austin: The Society for Imaging Science and Technology, 2010, 309-313 p.Conference paper (Refereed)
  • 21600.
    Öhlund, Thomas
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of applied science and design.
    Örtegren, Jonas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of applied science and design.
    Forsberg, Sven
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Nilsson, Hans-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Paper Surfaces for Metal Nanoparticle Inkjet Printing2012In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 259, 731-739 p.Article in journal (Refereed)
    Abstract [en]

    The widespread usage of paper and board offer largely unexploited possibilities for printed electronics applications. Reliability and performance of printed devices on comparatively rough and inhomogenous surfaces of paper does however pose challenges.Silver nanoparticle ink has been deposited on ten various paper substrates by inkjet printing. The papers are commercially available, and selected over a range of different types and construction. A smooth nonporous polyimide film was included as a nonporous reference substrate. The substrates have been characterized in terms of porosity, absorption rate, apparent surface energy, surface roughness and material content. The electrical conductivity of the resulting printed films have been measured after drying at 60°C and again after additional sintering at 110°C. A qualitative analysis of the conductivity differences on the different substrates based on surface characterization and SEM examination is presented. Measurable parameters of importance to the final conductivity are pointed out, some of which are crucial to achieve conductivity. When certain criteria of the surfaces are met, paper media can be used as low cost, but comparably high performance substrates for metal nanoparticle inks in printed electronics applications.

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