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Sökning: LAR1:lu > Högskolan Väst

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  • Abou Nada, Fahed, et al. (författare)
  • Remote temperature sensing on and beneath atmospheric plasma sprayed thermal barrier coatings using thermographic phosphors
  • 2016
  • Ingår i: Surface & Coatings Technology. - Elsevier. - 0257-8972. ; 302, s. 359-367
  • Tidskriftsartikel (refereegranskat)abstract
    • Investigations on remote temperature sensing of yttria stabilized zirconia (YSZ) thermal barrier coatings (TBCs) at the surface and at the bond-coat/top-coat interface were carried out. Using Y2O3:Eu thermographic phosphor as an embedded temperature sensing layer, sub-surface temperature probing through 300 μm of atmospheric plasma sprayed YSZ is demonstrated. The Y2O3:Eu thermographic phosphor displays a temperature sensitivity ranging between 400 °C up to a maximum of 900 °C when utilizing the luminescence originating from the 611 nm emission band. Dysprosium stabilized zirconia (10 wt.% DySZ), a TBC material, is also investigated and established as a temperature sensor from 400 °C up to a temperature of 1000 °C using both the intensity decay time and emission intensity ratio methods. In addition, the luminescence of presumed optically inactive YSZ materials was spectroscopically investigated in terms of optical interferences caused by impurities. A validation temperature probing measurement through 300 μm of YSZ top-coat was successfully performed in a SGT-800 Siemens burner running at six different operating conditions in an atmospheric combustion rig.
  • Agic, Adnan, 1967-, et al. (författare)
  • Influence of Cutting Edge Geometry on Force Build-up Process in Intermittent Turning
  • 2016
  • Ingår i: Procedia CIRP. - Elsevier. - 2212-8271. ; 46, s. 364-367
  • Tidskriftsartikel (refereegranskat)abstract
    • In the intermittent turning and milling processes, during the entry phase the cutting edges are subjected to high impact loads that can give rise to dynamical and strength issues which in general cause tool life reduction. In this study the effect of geometrical features of the cutting tool on the force generation during the entry phase is investigated. Cutting forces are measured by a stiff dynamometer at a high sampling frequency. In addition, the chip load area is analyzed and related to the measured cutting force. The results show that micro-geometrical features, in particular the protection chamfer, significantly affect the force generation during the entry phase.
  • Bergh, Anne-Louise, et al. (författare)
  • Perpetuating "New Public Management' at the expense of nurses' patient education: a discourse analysis
  • 2015
  • Ingår i: Nursing Inquiry. - Wiley-Blackwell. - 1440-1800. ; 22:3, s. 190-201
  • Tidskriftsartikel (refereegranskat)abstract
    • This study aimed to explore the conditions for nurses' daily patient education work by focusing on managers' way of speaking about the patient education provided by nurses in hospital care. An explorative, qualitative design with a social constructionist perspective was used. Data were collected from three focus group interviews and analysed by means of critical discourse analysis. Discursive practice can be explained by the ideology of hegemony. Due to a heavy workload and lack of time, managers could see' neither their role as a supporter of the patient education provided by nurses, nor their role in the development of nurses' pedagogical competence. They used organisational, financial, medical and legal reasons for explaining their failure to support nurses' provision of patient education. The organisational discourse was an umbrella term for things' such as cost-effectiveness, which were prioritised over patient education. There is a need to remove managerial barriers to the professional development of nurses' patient education. Managers should be responsible for ensuring and overseeing that nurses have the prerequisites necessary for providing patient education as well as for enabling continuous reflective dialogue and opportunities for learning in practice.
  • Björquist, Elisabet, 1959-, et al. (författare)
  • Living in transition - experiences of health and well-being and the needs of adolescents with cerebral palsy.
  • 2015
  • Ingår i: Child Care Health and Development. - Wiley-Blackwell. - 1365-2214. ; 41:2, s. 258-265
  • Tidskriftsartikel (refereegranskat)abstract
    • Transition to adulthood for adolescents in general is a multifaceted process, and for adolescents with cerebral palsy (CP) it also involves transition from child- to adult-oriented support. CP entails a variety and combination of disabilities, which in association with external factors may make the transition to adult health services difficult. The aim of this study was to gain a deeper understanding of how adolescents with CP experience their own health, well-being and need of support during their transition to adulthood.
  • Björquist, Elisabet, 1959- (författare)
  • Mind the gap. Transition to adulthood – youths’ with disabilities and their caregivers’ perspectives.
  • 2016
  • Doktorsavhandling (övrigt vetenskapligt)abstract
    • Transition to adulthood, referring to the process of moving from childhood to adulthood, can be a complex period for youths with disabilities who might need special support transitioning into an independent life as adults. Caregivers are significant persons for the youths, which is why their own health and wellbeing is important. Therefore the overall aim of this thesis was to gain a deeper understanding of health and wellbeing, challenges, preferences and needs during the transition from childhood to adulthood in youths with disabilities and their caregivers. The thesis is comprised of two studies, study A focusing on the perspectives of youths with CP (Paper I) and of their caregivers (Paper II) and Study B focusing on the perspectives of immigrant youths with disabilities and caregivers from Middle Eastern countries residing in Sweden (Paper III and IV). Study A had a qualitative approach and involved focus groups and individual interviews with 12 male and female youths, 17-18 years of age, with CP and various physical and cognitive levels of disabilities (Paper I), as well as 15 mothers and fathers (Paper II). The interviews were analysed using qualitative content analysis. In Study B, a combination of qualitative and quantitative methods was used. Based on structured and semi-structured questionnaires in combination with open ended questions interviews were conducted in Swedish or Arabic with 17 male and female youths, 13-24 years of age with various disabilities and 10 mothers, five fathers and one sibling. The families were all immigrants with Middle Eastern origin and most of them had lived in Sweden for more than five years. The questionnaires Family Need Survey (FNS), Rotterdam Transition Profile (RTP) and Canadian Occupational Performance Measure (COPM) were all translated and adapted to Swedish except for COPM where there already was a Swedish version. The results were analysed using mainly descriptive statistics and based on the framework of International Classification of Functioning, Disability and Health – Children & Youth Version (ICF-CY). The findings from study A showed that the experiences of youths and caregivers mostly concerned mental health and wellbeing described as both positive and negative experiences. Their family life was experienced as important, secure and convenient, which made the youths feel safe and gave parents a sense of meaningfulness. Youths described participation, socialising and love as being important, but also challenging and worrying. Caregivers experienced sorrow and anger and together with demanding logistics, planning and worrying, their health was affected negatively during their children’s transition to adulthood. The findings from study B showed that youths were dependent on their caregivers for transportations, participating in leisure activities and socialising with friends. They were also dependent on their caregivers for the demanding of support and health care. The youths had few or no experiences of intimate relationships but felt that they were expected to get married in the future which worried them and their caregivers. Caregivers were uncomfortable with using the term intellectual disability. Caregivers needed help to understand their child’s condition and to explain the child’s condition to their wives/husbands. A significant difference was found in what problems youths identified with and what their caregivers identified as their youth’s problems. The youths experienced problems with handling finances, transportations and seeking employment or daily activities whilst their caregiver thought their youth’s primary problems involved self-care. The overall finding showed that to strengthen health and wellbeing in youths with disabilities and their caregivers and to meet challenges, preferences and needs during transition from childhood to adulthood both youths and caregivers need information and support. Both youths and caregivers expressed a desire for individualised support given by one person who could facilitate the transition period by coordinating information and give support based on individual preferences and needs. During the recruiting process in both studies, great challenges were experienced in finding participants. Collaboration with professionals in schools and leisure activities was found to be the most effective way to get in contact with immigrant youths and thereby also their caregivers. The findings from this thesis may enable professionals to develop and improve best practice guidelines for support, habilitation and health care in youths’ transition. To facilitate for the youth to transfer from services with a family-centred approach to person-centred adult services, their autonomy must be strengthened by involving them in their own transition planning early on. Immigrant youths need special information and support about love and the freedom of choice to get married. The COPM and RTP are suggested to be used as tools in person-centred transition planning given they are used customized and applied with cultural sensibility. To enable those with communication limitations to give their independent voice the use of communication tools is necessary. Furthermore, the transition to person-centred adult support and health care should be flexible and not determined by biological age. However, youths need support by their caregivers who in turn might both need, and want, support for themselves and occasionally hands-on support. Guidance by a specially designated navigator aimed to support the whole family would be an option to meet individual needs. The information and support should be culturally sensitive with respect to various linguistic and cultural experiences. To close the gaps between systems of care collaboration was discussed to be necessary to facilitate the transition between support and health care for children and youths as well as services for adults. The use of ICF-CY as a framework for understanding needs and the standardised terminology in ICF-CY in documentation can facilitate this collaboration.
  • Björquist, Elisabet, 1959-, et al. (författare)
  • Parents' Experiences of Health and Needs When Supporting Their Adolescents With Cerebral Palsy During Transition to Adulthood.
  • 2016
  • Ingår i: Physical & occupational therapy in pediatrics. - Informa Healthcare. - 1541-3144. ; 36:2, s. 204-216
  • Tidskriftsartikel (refereegranskat)abstract
    • Parents are the primary support providers for adolescents with disabilities, their health and wellbeing is therefore of great importance when planning for youths' transition into adulthood. The aim of this study was to gain a deeper understanding of how parents of adolescents with cerebral palsy (CP) experience their own health and wellbeing and their needs for support during the adolescent's transition to adulthood.
  • Carlsson, E., et al. (författare)
  • Concerns and quality of life before surgery and during the recovery period in patients with rectal cancer and an ostomy.
  • 2010
  • Ingår i: Journal of wound, ostomy, and continence nursing : official publication of The Wound, Ostomy and Continence Nurses Society / WOCN. - 1528-3976. ; 37:6, s. 654-61
  • Tidskriftsartikel (refereegranskat)abstract
    • PURPOSE: Rectal cancer is the most common reason for a person to undergo ostomy surgery. The aim of this study was to assess concerns and health-related quality of life (HRQOL) before surgery and during the first 6 months following ostomy surgery in the presence of rectal cancer. SUBJECTS AND SETTINGS: The sample comprised 57 patients at a university hospital in Gothenburg, Sweden. Their median age was 66 years (range, 30-87); 35 men and 22 women participated in the study. METHODS: Participants prospectively answered questionnaires preoperatively, and at 1, 3, and 6 months postoperatively.Concerns were assessed using the rating form of the Inflammatory Bowel Disease Patient Concerns, and HRQOL was evaluated using the 36-Item Short Form Health Survey. Results were compared with population norms. RESULTS: Participants expressed concerns associated with developing cancer, being a burden on others, and related to the uncertain nature of disease. Health-related quality of life scores dropped significantly in 6 of 8 domains when preoperative scores were compared to those obtained 1 month postoperatively, but scores improved at 6 months. There were significant differences between preoperative study group scores and population norms on physical and emotional role function, social function, and for mental health domains. Significant differences persisted when population norms were compared to study group scores 6 months following surgery on all these domains except mental health. Participants identified good relations with significant others, social and leisure activities, psychological issues, and health as important for maintaining QOL. Obstacles to maintaining QOL included fatigue, pain, illness-induced limitations in life, and worries over what their new life would entail. CONCLUSION: Surgical management of rectal cancer raises concerns and profoundly impairs QOL during the first several postoperative months. © 2010 Wound, Ostomy and Continence Nurses Society.
  • De Backer, Jeroen, 1987- (författare)
  • Robotic Friction Stir Welding for Flexible Production
  • 2012
  • Licentiatavhandling (övrigt vetenskapligt)abstract
    • Friction Stir Welding eller ”friktionsomrörningssvetsning” är en svetsprocess som kräver ett roterande verktyg som genom friktionsvärme får materialet att mjukna. Verktyget blandar runt det plastiska materialet mekaniskt och skapar en fog av hög kvalité. Processen fungerar utan gas, utan rök, utan tillsatsmaterial och utan att smälta materialet. Alla dessa fördelar skapar stort industriellt intresse inom flera branscher. Idag används tekniken nästan uteslutande i styva maskiner som svetsar raka eller cirkulära fogar och framförallt för aluminium. Eftersom processen kräver stora krafter mellan material och verktyg är det svårt att implementera processen på en robot. En robot möjliggör svetsning av tredimensionella geometrier och ökar dessutom flexibiliteten.  Flera forskargrupper runt i världen har tagit fram en fungerande FSW robot som kan svetsa tunn lättviksmaterial som aluminium med hög kvalitet. Användningen i industrin av FSW robotar är däremot obefintlig och det finns ett antal anledningar till det. Först är roboten vek vilket gör att verktyget kan missa svetsfogen i hårda material och svetsdefekter kan uppstå. En annan anledning är at det inte finns en användbar automatiserad processtyrning tillgänglig, mest för att FSW är en robust process och inte kräver en avancerad styrning vid svetsning av raka fogar.De praktiska arbeten som redovisas i denna licentiatuppsats är huvudsakligen utförda i en robotiserad FSW-demonstrator på Högskolan Väst. FSW-roboten är en modifierad industrirobot som är försetts med spindel och kraftåterkoppling för att styra kraften som roboten applicerar på arbetsstycket.Detta arbete har identifierat ett antal problem som behöver lösas för att få en robust robotiserad FSW process i en flexibel produktionsmiljö. I denna licentiatrapport beskrivs en lösning hur en typ av svetsdefekter kan förhindras genom en sensorbaserad bankompensering. Både en kamera- och lasersensor-baserad mätmetod presenteras. En annan bankompenseringsstrategi är beskriven, som använder kraftsensorn från befintlig kraftåterkoppling istället för att lägga till extra sensor. Denna strategi kan utvecklas till en komplett utböjningsmodell på roboten i hela arbetsområdet. Robotens begränsningar gällande svetsbarhet av hårda material har undersökts och med hjälp av parameteroptimering och förvärmning kan även hårda nickelbaserade legeringar svetsas med roboten.
  • Dåderman, Anna Maria, 1953-, et al. (författare)
  • Flunitrazepam intake in male offenders
  • 2012
  • Ingår i: Nordic Journal of Psychiatry. - Informa Healthcare. - 1502-4725. ; 66:2, s. 131-140
  • Tidskriftsartikel (refereegranskat)abstract
    • The abuse of flunitrazepam (FZ) compounds is worldwide, and several studies have reflected on the consequences with regard to violence, aggression and criminal lifestyle of FZ users. Criminals take high doses of FZ or some other benzodiazepines to "calm down" before the planned crime. There is support from earlier studies that most likely, all benzodiazepines may increase aggression in vulnerable males. Chronic intake of high doses of FZ increases aggression in male rats. Because psychopathy involves aggression, we have examined whether psychopathy as well as any of the four facets of the Psychopathy Checklist-Revised (PCL-R) (Interpersonal, Affective, Lifestyle and Antisocial) are related to different substance use disorders, with the focus on FZ. We have also examined the relationship between each PCL-R item and FZ use. Participants were 114 male offenders aged 14-35 years, all of whom were convicted for severe, predominantly violent, offences. Substance use, including FZ, was not more common in those who scored high in psychopathy. Use of FZ was more common in offenders who scored high in Facet 4 (Antisocial) of the PCL-R (odds ratio = 4.30, 95% CI 1.86-9.94). Only one of the PCL-R items, "Criminal versatility", was significantly associated with FZ use (odds ratio = 3.7). It may be concluded that intake of FZ has a specific relationship to only one of the facets and not to psychopathy per se. The findings have also important theoretical implications because Facet 4 is not a key factor of the construct of psychopathy. Clinical implications of the article: We have used the new two-factor and four-facet theoretical model of psychopathy in the young offender population, many of them with one or more substance use disorders. The present results suggest that antisocial behavior defined by Facet 4 (poor behavioral control, early behavior problems, juvenile delinquency, revocation of conditional release and criminal versatility) in the studied subjects is more typical for FZ users than it is for non-FZ users. This may have implications for assessment and treatment. Clinicians should be aware that criminals with high scores on Facet 4 have a more than fourfold odds of being a FZ user. This conclusion has an important clinical implication because FZ abuse is very common and is not always the focus of a forensic psychiatric assessment.
  • Ericsson, Mikael, 1975-, et al. (författare)
  • Non-contact Temperature Measurements using an Infrared Camera in Aerospace Welding Applications
  • 2002
  • Ingår i: 6th International Conference on Trends in Welding Research : Phoenix, AZ; 15-19 April 2002. - Materials Park : ASM International. ; s. 930-935
  • Konferensbidrag (refereegranskat)abstract
    • This paper describes the application of infrared (IR) thermal imaging and temperature measurements in welding applications, both on single plane plates and on an aero engine turbine component with complex geometry. Temperature profiles were measured on the plates using thermocouples (T/C) in combination with an IR camera system, and the results were compared. The IR camera was used both in line scan mode (270 Hz scan frequency) and in full frame mode (1 Hz frame rate). Different methods of surface treatments have been tested to handle the problem of the surface emissivity variations due to oxidation during welding. Results from measurements using thermocouples and IR camera is presented in the paper as well as temperature measurements using the IR camera on an turbine exhaust case (TEC) engine component.
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