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  • 28701.
    Yusuf, Farah
    et al.
    Jönköping University, School of Education and Communication.
    Jaykar, Ida
    Jönköping University, School of Education and Communication.
    Emilsson, Isabelle
    Jönköping University, School of Education and Communication.
    Hur tolkar du?: En studie om reklambilder utifrån sändar- och mottagarperspektiv.2008Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

     

     

    The study aims to gain a better understanding and explore how a selected group (receivers) perceive two elected advertising images from Indiska and Vila and then compare their opinions to what Indiska and Vila themselves want to communicate. We base the study on theories of encoding / decoding, which deals with how the companies charge their advertising images with values and how recipients decodes these values.

    A qualitative study was carried out based on analytical induction (planning, collection and analysis). Through the analytical method of induction, we created categories based on the collected data and put them in relation to each other. The result showed that the overall impression of the images' and the context are of great importance for how our respondents perceive the advertising images. The overall impressions convey emotion that reinforces the expression and the message. The respondents partially perceived the transmitters' message in the pictures, but some elements did not match the transmitters' intention.

    We also made a reception analysis to find out whether the nursery place of our respondents made a difference in how they interpreted the advertising images. Although we could not reveal any significant difference between these groups, we still believe that social, cultural and economic background matters when it comes to interpretation.

  • 28702.
    Yusuf, Maryan
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Sege, Victoria
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Framgångsfaktorer vid övergång till ISO 9001:20152017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose with this study aims to identify the most important and critical factors for small-sized companies to make way for a successful transition to ISO 9001:2015. Because of the new structure, it is difficult for companies to interpret the standard and what is required to achieve a certification. This study has therefore been carried out at the manufacturing company FIG Metall in Gnosjö. 

    The study is based on qualitative research. Observation, interviews and document views were made at FIG Metall. Interviews were also carried out with the auditing company Qvalify and the Swedish Standards Institute to receive their views on which the important factors are as well as the general difficulties for companies when transitioning.  The interviews were semi-structured which resulted in an open discussion where the respondents were free to answer based on how they perceived the questions.

    The results of the empirical data were the basis of the analysis and the conclusion. The different methods used in the report can be seen in figure 10 which shows the triangular approach of the study. Qvalify and SIS agreed upon the same areas companies need to focus on when transitioning to ISO 9001:2015.

    The result of this study shows that the most important areas smaller companies need to focus on when transitioning are Leadership, Context of the organization, Risk based thinking and Process approach. The study concluded that ISO 9001:2015 is closely related to total quality management (TQM), organizational development and organizational psychology and can be used as complementary tools to the standard.

     

     

     

  • 28703.
    Yüksel, Linda
    Jönköping University.
    Dum eller demonisk?: En kvalitativ analys av framställningen av ondska i tre Disneyfilmer.2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    I dag påverkar populärkulturella medier som film och tv hur vi människor uppfattar verkligheten omkring oss. Företaget Walt Disney Company är ett ledande företag när det gäller film och underhållning för barn. Hur Disney framställer vad som är gott och vad som är ont påverkar hur barn, men även vuxna ser på dessa fenomen. Syftet med uppsatsen är att analysera hur ondska framställs i tre olika Disneyfilmer. Filmerna som analyseras är Kejsarens nya stil, Prinsessan och grodan och Vaiana. Genom en kvalitativ analys undersöks framställningen av ondska i filmerna. Innehållet analyseras utifrån filosofen Lars Fr. H Svendsens filosofi där fyra typer av ondska presenteras. Av analysen framgår att den typ av ondska som framför allt framställs i filmerna är en instrumentell typ av ondska. De aktörer som utför onda handlingar i Disneyfilmerna har oftast därför motiv till handlingen som kommer leda till att de själva tjänar på att utföra den. 

  • 28704.
    Yüksel, Linda
    Jönköping University, School of Education and Communication.
    Samhällskunskap - för livet eller betyget?: En kvalitativ studie om gymnasieelevers uppfattningar av studiemotivation i ämnet samhällskunskap2018Independent thesis Advanced level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Som framtida lärare är studiemotivation ett nyttigt och intressant ämne att studera då studier visat att det finns samband mellan elevers motivation att lära och skolresultat. Vad det är som gör att människor blir motiverade är en fråga som ställts länge. I denna studie lyfts vilka faktorer gymnasieelever själva uppfattar som bidragande till deras studiemotivation i ämnet samhällskunskap. Syftet med studien är dels att undersöka vilka faktorer de deltagande gymnasieeleverna uppfattar som bidragande till studiemotivation i ämnet samhällskunskap, dels att undersöka hur dessa elever beskriver vad fenomenet motivation betyder. Genom kvalitativa intervjuer har sju gymnasieelevers uppfattningar undersökts och materialet har analyserats dels genom en fenomenografisk analysmetod, dels genom en innehållsanalys. Av analysen framkommer att det är svårt att ge en enhetlig bild av begreppet motivation. Respondenterna beskriver två skilda uppfattningar, motivation som ett mål samt motivation som en vilja att nå ett mål. I de båda uppfattningarna är målet en central del. Huvudsakliga faktorer för motivation som upplevs bland respondenterna har med intresset för ämnet, chansen att uppnå målet, lärarens kommunikation av bedömning, lärarens förväntningar samt lärarens undervisningsmetoder att göra.

  • 28705.
    Yüksel, Linda
    Jönköping University, School of Education and Communication.
    Vägen till en lyckad integration: En intervjustudie om asylsökandes upplevelse av integrationsprocessen i Jönköpings kommun2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 28706.
    Zaar, Amanda
    Jönköping University, School of Education and Communication, HLK, School Based Research, Teaching and Learning Language, Literature and Media.
    Digitala verktyg i svenskundervisningen: En kvalitativ studie kring lärares användning av digitala verktyg i svenskundervisningen samt hur användningen av digitala verktyg upplevs påverka elevers motivation till lärande2017Independent thesis Advanced level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of the study is to examine how teachers describe their use of digital tools in teaching the subject of Swedish and how the teachers’ perceive that pupils' motivation for learning is affected when working with digital tools in the classroom. The study is based on a qualitative phenomenological research approach.  The collection of data has been done through a questionnaire on the Internet, which was answered by teachers that work in elementary school grades 4-6, teaching the subject of Swedish, and using digital tools in their every day teaching. The result clearly shows that digital tools are used in several different ways in the subject of Swedish.  Mostly, digital tools are used when working with different types of texts, but also for example to blog, show films and to give feedback on pupils’ work. The result also shows that digital tools have a manly positive impact on the pupils’ motivation. For example, one respondent describes that the computer contribute to easier text editing, which makes the pupils more motivated to redo and change in their work. The one case, when pupils’ motivation for learning has been perceived as negative can be linked to the use of digital tools as special support in teaching and the respondent describes that the pupils' sense of being singled out is the main reason.

  • 28707.
    Zabrovskaya, Evgenia
    et al.
    Jönköping University, Jönköping International Business School, JIBS, Business Administration.
    Laur, Inesa
    Jönköping University, Jönköping International Business School, JIBS, Business Administration.
    UNDRESSING INTERACTIONS: the effect of interactions on performance in multi-project settings2010Independent thesis Advanced level (degree of Master (Two Years)), 30 credits / 45 HE creditsStudent thesis
    Abstract [en]

    Contemporary companies work in complex environment comprising many simultaneous running projects, i.e. multi-project settings. To a large extend those projects are interdependent and are multi-professionally constituted of representatives from customers, suppliers, other business partners and researchers from academia. The success of projects, particularly in the multi-project setting, is dependent of the collaboration and interaction among those actors involved. The aim of this article is to explore the dynamics of interactions with external actors, such as customers, suppliers, other business partners and academia and investigate the effect of interactions on performance in multi-project settings.

    The methodology is based on a mixed-method approach, comprising a quantitative survey and a complementary case study. The quantitative survey questions are based on the extended literature study of project management interactions. The case study was selected in order to create a deeper understanding of the processes of interaction, barriers to interactions and the outcome in terms of project performance. The results show that interactions with external actors positively influence performance in terms of estimated quality, time, and cost, innovations and actor satisfaction.

  • 28708.
    Zabrovskaya, Yulia
    et al.
    Jönköping University, Jönköping International Business School.
    Pavilonyte, Monika
    Jönköping University, Jönköping International Business School.
    Revenue determinants of music festivals: A case of pop/rock, jazz and classical music festivals in Scandinavia2010Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    We have chosen several types of festival (rock/pop, classic and jazz) in Scandinavian region (Sweden, Denmark and Finland), selected the biggest music events in each of the regions and marked the main factors affecting the revenue of the festival, why some of festivals occurring every year and some just have lack of visitors, as we suppose. Purpose is to define the main factors which influence revenues of festivals of classic, rock/pop and jazz genre. Methodology is to determine these factors. Quantitative analysis was used in order to collect necessary data. Organizers of festivals in Sweden, Finland and Denmark took part in the survey; they answered and gave information to main research questions, primary data. Secondary data was sourced from music events web-pages and articles. The collected data was analyzed by means of the statistical programs. We conclude that the research showed that the share of international artists, number of sponsors, the number of volunteers, the length of the music event, the music genre of a festival and government grants for the classic festivals affect festival revenues.

  • 28709.
    Zachhuber, Bernhard
    et al.
    Jönköping University, Jönköping International Business School, JIBS, Marketing and Logistics.
    Adolfsson, Per
    Jönköping University, Jönköping International Business School, JIBS, Marketing and Logistics.
    Putting a Price Tag on Loyalty: The Relationship of Customer-Segment Pricing and Student Loyalty in the Case of the Mecenat Card at Jönköping International Business School, Sweden2012Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Background      Catering to customer needs and wants by, at the same time, reaping maximum profits has, since the beginning of trade, been a tricky task for companies. Customer-segment pricing, i.e. offering lower prices to different target group segments, and its retail manifestation, student discounts, cater to students’ budgetary constraints, serving not only their particular needs but in return offering the company the possibility to reap long term profits from loyal students. High levels of price sensitivity among students provide companies a welcome point of action to address students and make them both attitudinal and behavioural loyal customers by means of financial incentives. The Mecenat card grants students access to those discounts – but does it help to make them loyal?

    Purpose            The purpose of this thesis lies in the exploration and description of a potential relationship between customer-segment pricing, i.e. student discounts and the formation of student loyalty. This exploration shall further be accompanied by a thorough analysis of the Mecenat card as a loyalty program and its ability to evoke student loyalty within the student body of Jönköping International Business School.

    Method             The research interest was served best by conducting qualitative prior to quantitative research. The focus groups allowed for a first insight into the topic and students’ opinions. These findings were then described by means of content analysis and further processed in quantitative research. An electronic survey was used to collect data from a sample drawn out of the total population of JIBS students. The data then was processed by means of descriptives, correlations, T-tests and factor analysis.

    Conclusion        Students at JIBS are a highly profitable customer segment, willing to be both attitudinal and behavioural loyal to stores that cater to their budgetary constraints by offering student discounts. The Mecenat card, however, due to low awareness and usage levels within the student body does not facili-tate, but rather hinders, the development of student loyalty. Thus, the find-ings were also processed into managerial implications that could help im-prove the service, such as improvements in communication 

  • 28710.
    Zachlund, Pontuz
    et al.
    Jönköping University, Jönköping International Business School, JIBS, Informatics.
    Kallin, Mathias
    Jönköping University, Jönköping International Business School, JIBS, Informatics.
    “Technology can always crash; pen and paper will always work.”: The Internet of Things in the Swedish Hockey League2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Background: Internet of Things is one of the most important areas of future technology and countless of industries are directing attention towards it. IoT has now started to appear in the sport industry. One sport that has not been investigated to the same extent within the terms of IoT is ice hockey.

    Problem Statement: Numerous teams in ice hockey have not yet realized the impact IoT may have on their team performance. With an absence in research on the use of IoT in the Swedish ice hockey industry, there is a knowledge gap on how Swedish ice hockey teams can grasp this opportunity and the main factors that affect their adoption.

    Research Purpose: IoT creates an opportunity for Swedish ice hockey teams to achieve a competitive advantage and thus a chance to gain new grounds in managing their teams. The purpose of this thesis is to investigate to what extent teams in the Swedish Hockey League are using IoT devices and explore the factors affecting the adoption process.

    Research Questions: To what extent are IoT devices used by teams in the Swedish Hockey League to increase teams’ performance? What main factors affect the adoption of IoT devices into teams in the Swedish Hockey League?

    Method: With an inductive approach, this qualitative research explores the IoT phenomenon in the context of ice hockey in SHL. With semi-structured interviews, this research gather data from the perspectives of seven SHL teams on IoT. By using a conventional content analysis, the data collected is categorized and divided into themes.

    Results: The use of IoT devices in SHL is low. The interest to adopt IoT devices is shared amongst many interview participants. When conducting the conventional content analysis on the data gathered from the interviews, certain themes became evident. The findings could be traced down to either their attitude, their competence within the field or their resources.

    Conclusion: The Internet of Things is changing the way professional sport teams are managed, coached, and led. The benefits that could be harvested from adopting IoT devices are undeniable, but there are several factors that facilitate a successful adoption. The culture and atmosphere in the organization, the skills and know-how, and the financial situation are all important parts of a successful adoption.

  • 28711. Zachrisson, Gerd
    et al.
    Rydeman, Bitte
    Björck-Åkesson, Eva
    Jönköping University, School of Education and Communication, HLK, CHILD.
    Gemensam problemlösning vid alternativ och kompletterande kommunikation (AAK)2002Report (Other academic)
  • 28712.
    Zackrisson, Mats
    et al.
    Swerea, Sweden.
    Kurdve, Martin
    Swerea, Sweden.
    Shabazi, Sasha
    Mälardalen University, Sweden.
    Wiktorsson, Magnus
    Mälardalen University, Sweden.
    Winroth, Mats
    Chalmers University of Technology, Sweden.
    Landström, Anna
    Chalmers University of Technology, Sweden.
    Almström, Peter
    Chalmers University of Technology, Sweden.
    Andersson, Carin
    Lund University, Sweden.
    Windmark, Christina
    Lund University, Sweden.
    Ericson Öberg, Anna
    Volvo Construction Equipment AB, Sweden.
    Myrelid, Andreas
    GKN Aerospace Engine Systems AB, Sweden.
    Sustainability performance indicators at shop floor level in large manufacturing companies2017In: Procedia CIRP, ISSN 2212-8271, E-ISSN 2212-8271, Vol. 61, p. 457-462Article in journal (Refereed)
    Abstract [en]

    This article investigates sustainability in the performance measurement systems of Swedish manufacturing companies. It builds on a previous study that documents relatively few direct environmental indicators at shop floor level, which raises questions about possible indirect links between existing indicators and the environment that could be used to improve the environmental aspect of company´s sustainability ambitions. 

    A method for identifying and categorizing indirect links to sustainability issues was defined and used. The results suggest that at shop floor level 90% of the indicators have at least an indirect relation to one or more of the sustainability dimensions economy, environment and social, of which 26% are at least indirectly related to the environmental dimension. Despite the many indirect connections, participating companies perceive a need to improve sustainability indicators and some ideas are suggested.

  • 28713.
    Zackrisson, Moa
    et al.
    Jönköping University, Jönköping International Business School.
    Mujaj, Ylberina
    Jönköping University, Jönköping International Business School.
    BEPS åtgärdspunkt 7: Krävs en förändring av OECD:s modellavtal enligt åtgärdspunkt 7 i BEPS åtgärdsplan, för att undvika erodering av länders skattebaser?2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
  • 28714.
    Zackrisson, Nathalie
    et al.
    Jönköping University.
    Elv, Amanda
    Jönköping University.
    Lekens betydelse för inkludering av alla barn: En kvalitativ studie om förskollärares beskrivningar av inomhuslekens betydelse för inkludering2019Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Studien avser att bidra med kunskap om hur leken inomhus har betydelse för inkludering. I studien betyder inkludering att få känna sig accepterad och att alla barn ska få känna att de tillhör gemenskapen i förskolan. Frågeställningarna berör hur förskollärarna beskriver sitt arbete för att främja inkludering genom lek samt vilka pedagogiska möjligheter och utmaningar som beskrivs finnas i lekens betydelse för inkludering. Studien har en kvalitativ ansats som innebär att förskollärarnas tolkningar och uppfattningar synliggjorts kring lekens betydelse. Empirin har samlats in genom enkäter med öppna frågor. Materialet har analyserats och tre teman har framställts: gruppkonstellationer, närvarande förskollärare i leken och lek – verktyg för värdegrundsarbete. Studien utgår från det sociokulturella perspektivet och man ser interaktionerna mellan individerna som betydelsefulla. I resultatet beskriver förskollärarna vikten av att vara närvarande i barns lek för att alla ska kunna känna sig inkluderade. Det har även framkommit att mindre grupper och olika konstellationer möjliggör för förskollärarna att se, stötta och utmana alla barn. Det framgår även att det finns utmaningar i att alla barn inkluderas i leken samt att hitta rätt gruppkonstellationer som gynnar barnen.

  • 28715.
    Zafarzadeh, Masoud
    et al.
    Mälardalens högskola, Innovation och produktrealisering.
    Jackson, Mats
    Mälardalens högskola, Innovation och produktrealisering.
    Automation from lean perspective: Potentials and challenges2013In: Proceedings of the 11th International Conference on Manufacturing Research (ICMR2013), Cranfield University, UK, 19th – 20th September 2013, International Conference on Manufacturing Research (ICMR) , 2013, p. 437-442Conference paper (Refereed)
    Abstract [en]

    The competitive climate of production and high labour cost, motivate western companies to use technologies like automation as a mean to increase manufacturing competitiveness. On the other hand companies are aware about cost reductive policies like lean production which has shown noticeable achievement, consequently some manufacturers tend to follow such system. In this situation, in order to have lean enterprise, it is vital to find a clear picture of challenges and potentials of implementing automation within a lean environment. So, finding the right level and type of automation becomes vital for companies, and achieving this is not possible without a lean development of automation. The paper presents an overview of automation development from a lean perspective. The focus is on manufacturing and a case study in the automotive industry is presented. Challenges and potentials of automation are pinpointed and some suggestions regarding automation development is given.

  • 28716.
    Zaffar, Fahd Omair
    et al.
    Chalmers University of Technology.
    Ghazawneh, Ahmad
    Jönköping University, Jönköping International Business School, JIBS, Business Informatics.
    Knowledge Sharing and Collaboration Through Social Media: The Case of IBM2012In: Proceedings of the 7th Mediterranean Conference on Information Systems, MCIS 2012, Guimarães, Portugal: Association for Information Systems, 2012, Vol. Paper 28Conference paper (Refereed)
    Abstract [en]

    Intellectual capital is the single most important asset owned by any organization. Business continuity, innovation, and long-term sustainability of Small Medium Enterprises depend partly on accumulated organizational knowledge. Knowledge is hard to capture and manage due to its implicit nature. This paper seeks to investigate how Web 2.0 technologies are being used to overcome knowledge sharing and collaboration issues. The new web technologies, which are based on platforms, are referred to as emergent social software platforms (ESSP’s). The use of ESSP’s within a business enterprise to achieve business goals is known as enterprise 2.0 (E2.0). Central to this research is the proposed knowledge sharing cycle model, which has three main stages - internalization, externalization, and objectification. This model is adapted based on the findings of a case study of IBM Corporation. The findings indicate that ESSP’s can be used to support knowledge sharing practices and to help convert knowledge into its different forms.

  • 28717.
    Zagar, Alexander
    et al.
    Jönköping University, School of Engineering, JTH, Computer Science and Informatics.
    Ekelund, Jonathan
    Jönköping University, School of Engineering, JTH, Computer Science and Informatics.
    Skapandet av ett webbaserat ärendehanteringssystem för affärssystemet Pyramid med Scrum: Creation of a web based case management system for the business system Pyramid with Scrum2014Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    The business system known as Pyramid does today not provide its user with a reasonable system regarding case management for support issues. The current system in place requires the customer to contact its provider via telephone to register new cases. In addition to this, current system doesn’t include any way for the user to view any of their current cases without contacting the provider.A solution to this issue is to migrate the current case management system from a telephone contact to a web based platform, where customers could easier access their current cases, but also directly through the website create new cases. This new system would reduce the time required to manually manage each individual case, for both customer and provider, resulting in an overall reduction in cost for both parties.The result is a system divided into two different sections, the first one is an API created in Pyramid that acts as a web service, and the second one a website which customers can connect to. The website will allow users to overview their current cases, but also the option to create new cases directly through the site. All the information used to the website is obtained through the web service inside Pyramid. Analyzing the final design of the system, the developers where able to conclude both positive and negative aspects of the systems’ final design. If the platform chosen was the optimal choice or not, and also what can be include if the system is further developed, will be discussed.The development process and the method used during development will also be analyzed and discussed, what positive and negative aspects that where encountered. In addition to this the cause and effect of a development team smaller than the suggested size will also be analyzed. Lastly an analysis of actions that could’ve been made in order to prevent certain issues from occurring will.

  • 28718.
    Zahirovic, Rezak
    et al.
    Jönköping University, School of Health and Welfare.
    Ekman, Scott
    Jönköping University, School of Health and Welfare.
    Circadian blood pressure within young adults in Viet Nam: An exploratory study comparing a normal blood pressure group and a prehypertension group2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Hypertension is a global disease that many effected people in developing countries is not aware of. Hypertension is linked with cardiovascular disease. Prehypertension is not a disease but if not correctly treated, it could develop into hypertension. The aim of the study was to investigate if there are any differences in circadian blood pressure between two study groups, one group with normal blood pressure and one group with prehypertension. This study was a explorative study and its design is based on measurements of blood pressure values and a questionnaire was used to help get the data collection. 51 students volunteered to have their blood pressure taken from them and out of these 51, 24 where selected into two groups of 12 each for the Ambulatory blood pressure monitoring.

    hese 24 students would be a part of our study and an ambulatory (Schiller-102 plus) blood pressure monitor was used to collect the data. The prevalence of prehypertension findings in the clinical testing phase was 37% of the population. There was a variation between the groups during the day (systolic) but there was not a significant difference during the night. 

  • 28719.
    Zahiti, Kreshnik
    et al.
    Jönköping University, School of Education and Communication.
    Al-fatlawy, Athir
    Jönköping University, School of Education and Communication.
    Lärande i fritidshemmet: En intervjustudie med vårdnadshavare angående lärandet som sker i fritidshemmet2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Antal sidor: 33

    Denna studie syftar till att belysa vårdnadshavarnas reflektioner kring lärandet som sker i fritidshemsverksamheten. Studien har genomförts på två skolor i Jönköpings län och 10 respondenter har deltagit. Intervjuerna har genomförts i form av semistrukturerad intervju och de svar som har angivits ligger till grund för resultatet. Vi valde att använda oss av ett sociokulturellt perspektiv då detta är relevant för det lärande som sker i fritidshemmet då den verksamhet som bedrivs i stor utsträckning sker mellan eleverna samt mellan lärare och elev. Genom att jämföra datamaterialet med tidigare forskning inom området, som har utgått från liknande syfte, har vi kommit fram till olika likheter och skillnader. Resultatet av denna studie visar att vårdnadshavarna beskriver att eleverna i fritidshemmet lär sig en rad olika saker och dessa i stor utsträckning sker i informella sammanhang men även i formella sammanhang. Vidare skiljer sig fritidshemmet mot den obligatoriska skolan främst genom att eleverna i fritidshemmet lär sig i det sociala samspelet och att fritidshemmet har en struktur vilken bjuder in eleverna till att ta ansvar och påverka utformningen av verksamheten.

  • 28720. Zahra, S.
    et al.
    Brush, C.G.Davidsson, PerJönköping University, Jönköping International Business School, JIBS, EMM (Entrepreneurship, Marketing, Management).Fiet, J.Greene, P.G.Harrison, R.T.Lerner, M.Mason, C.Sheperd, D.Sohl, J.E.Wiklund, JohanJönköping University, Jönköping International Business School, JIBS, EMM (Entrepreneurship, Marketing, Management).Wright, M.
    Frontiers of Entrepreneurship Research 2006: proceedings of the Twenty-sixth Annual Entrepreneurship Research Conference2006Conference proceedings (editor) (Other academic)
  • 28721. Zahra, S.A.
    et al.
    Brush, C.G.Davidsson, PerJönköping University, Jönköping International Business School, JIBS, ESOL (Entrepreneurship, Strategy, Organization, Leadership). Jönköping University, Jönköping International Business School, JIBS, Business Administration.Fiet, J.O.Greene, P.G.Harrison, R.T.Lerner, M.MASON, C.Shepherd, DeanSohl, JWiklund, JohanJönköping University, Jönköping International Business School, JIBS, ESOL (Entrepreneurship, Strategy, Organization, Leadership). Jönköping University, Jönköping International Business School, JIBS, Business Administration.Wright, M
    Frontiers of Entrepreneurship Research 2005: Proceedings of the Twenty-Fifth Annual Entrepreneurship Research Conference2005Conference proceedings (editor) (Other academic)
  • 28722. Zahra, S.A.
    et al.
    Wiklund, Johan
    Jönköping University, Jönköping International Business School, JIBS, ESOL (Entrepreneurship, Strategy, Organization, Leadership). Jönköping University, Jönköping International Business School, JIBS, Business Administration.
    THE EFFECT OF TOP MANAGEMENT TEAM CHARACTERISTICS ON PRODUCT INNOVATION AMONG NEW VENTURES: THE MODERATING ROLE OF BEHAVIORAL INTEGRATION2010In: Academy of Management Proceedings, Montreal, Canada, 2010, p. -6Conference paper (Refereed)
    Abstract [en]

    This study examines the effect of top management teams' characteristics on the number and radicalness of product innovations. Using longitudinal data from 109 new ventures, results show that TMT's alertness, growth orientation, and functional heterogeneity are positively associated with product innovation. These associations are stronger in ventures with integrated TMTs.

  • 28723. Zahra, Shaker A.
    et al.
    Brush, Davidsson, PerJönköping University, Jönköping International Business School, JIBS, EMM (Entrepreneurship, Marketing, Management).Fiet, Greene, Harrison, Learner, Mason, Shepherd, Sohl, Wiklund, JohanJönköping University, Jönköping International Business School, JIBS, EMM (Entrepreneurship, Marketing, Management).Wright,
    Frontiers of Entrepreneurship Research 2005: proceedings of the twenty-fifth annual Entrepreneurship Research Conference2005Conference proceedings (editor) (Other academic)
  • 28724.
    Zahra, Shaker A.
    et al.
    University of Minnesota.
    Criaco, Giuseppe
    Jönköping University, Jönköping International Business School, JIBS, Center for Family Enterprise and Ownership (CeFEO).
    Naldi, Lucia
    Jönköping University, Jönköping International Business School, JIBS, Center for Family Enterprise and Ownership (CeFEO).
    Larraneta, Barbara
    Pablo de Olavide University.
    Industry Knowledge Characteristics, Prior Experience and New Venture Survival2015In: Academy of Management Proceedings, January 2015 (Meeting Abstract Supplement) 17103, 2015Conference paper (Refereed)
    Abstract [en]

    Recent research suggests that new ventures can overcome threats to their survival by gaining access to technological knowledge from other firms in their industry, even without directly transacting with them or joining their networks. This happens through vicarious learning that allows these ventures to abduct spillovers of industry knowledge made public through patents. We propose that the effects of the industry public knowledge on new venture survival are likely to depend on the unique characteristics of that knowledge—its breadth and newness—and its interaction with a venture’s human capital’s prior experience in the industry. We test and find support for these predictions in a sample of Swedish new ventures. The study contributes to the literatures in organizational learning and new venture survival.

  • 28725.
    Zahra, Shaker A.
    et al.
    University of Minnesota.
    Naldi, Lucia
    Jönköping University, Jönköping International Business School, JIBS, Center for Family Enterprise and Ownership (CeFEO).
    Larraneta, Barbara
    Pablo de Olavide University.
    Criaco, Giuseppe
    Jönköping University, Jönköping International Business School, JIBS, Center for Family Enterprise and Ownership (CeFEO).
    Industry knowledge and new venture survival2014Conference paper (Refereed)
  • 28726. Zahra, Shaker
    et al.
    Neubam, Donald
    Naldi, Lucia
    Jönköping University, Jönköping International Business School, JIBS, EMM (Entrepreneurship, Marketing, Management).
    The Effects of Ownership and Governance on SMEs' International Knowledge-based Resources2007In: Small Business Economics, ISSN 0921-898X, E-ISSN 1573-0913, Vol. 29, no 3, p. 309-327Article in journal (Refereed)
  • 28727. Zahra, Shaker
    et al.
    Sapienza, Harry
    Davidsson, Per
    Jönköping University, Jönköping International Business School. Jönköping University, Jönköping International Business School, JIBS Entrepreneurship Centre. Jönköping University, Jönköping International Business School, JIBS, Business Administration. Jönköping University, Jönköping International Business School, JIBS, EMM (Entrepreneurship, Marketing, Management).
    Entrepreneurship and Dynamic Capabilities: A Review, Model and Research Agenda2006In: Journal of Management Studies, ISSN 0022-2380, E-ISSN 1467-6486, Vol. 25, no 4, p. 917-955Article in journal (Refereed)
  • 28728. Zahra, Shaker
    et al.
    Welter, Friederike
    Jönköping University, Jönköping International Business School, JIBS, Centre for Innovation Systems, Entrepreneurship and Growth . Jönköping University, Jönköping International Business School, JIBS, EMM (Entrepreneurship, Marketing, Management).
    Entrepreneurship Education for Central, Eastern and Southeastern Europe2008In: Entrepreneurship and Higher Education, Paris: OECD , 2008, p. 165-192Chapter in book (Other academic)
  • 28729. Zakirova-Engstrand, Rano
    et al.
    Granlund, Mats
    Jönköping University, School of Health and Welfare, HHJ, Dep. of Behavioural Science and Social Work. Jönköping University, School of Health and Welfare, HHJ. CHILD. Jönköping University, School of Education and Communication, HLK, CHILD.
    The International Classification of Functioning, Disability and Health: Children and youth (ICF-CY): Testing its utility in classifying information from eco-cultural family interviews with ethnically diverse families with children with disabilities in Kyrgyztan2009In: Disability and Rehabilitation, ISSN 0963-8288, E-ISSN 1464-5165, Vol. 31, no 12, p. 1018-1030Article in journal (Refereed)
  • 28730.
    Zakrisson Mortensson, Elin
    et al.
    Jönköping University, School of Health and Welfare, HHJ, Dep. of Natural Science and Biomedicine.
    Öhlen, Malin
    Jönköping University, School of Health and Welfare, HHJ, Dep. of Natural Science and Biomedicine.
    Samband mellan tandvårdsrädsla och temperament- vilken betydelse har kön och utländsk bakgrund?: En tvärsnittsstudie på ungdomar i nionde klass i Jönköpings kommun2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Summary

     

    Associations between dental fear and temperament - does sex or foreign origin have an impact? A cross-sectional study of youths in the ninth grade in Jönköping.

     

    Background: Dental fear is a common problem in dental care which can contribute to a poor oral health. Previous research shows certain correlations between dental fear and temperaments but varies. Objective: The aim of this study was to investigate the association between dental fear and temperament of youths in ninth grade. Method: The study is a cross-sectional study based on a stratified sample of youths in ninth grade. Two validated questionnaires containing self-reported questions about dental fear and temperament was distributed. Results: A total of 3 % was found to have dental fear. Significant correlation between DFS scores and shyness were observed. Women had significantly higher mean in DFS scores and emotionality, compared to men. Males had significantly higher mean in the temperament activity. No significant associations were found between dental fear and foreign or Swedish background. Youths with a Swedish background had higher mean in sociability. Conclusion: The prevalence of dental fear was 3 % of the young people. The women had a higher score of DFS and emotionality. The men reported higher degree of activity. Young people with foreign background had a lower degree of sociability. A significant association was found between DFS scores and shyness.

  • 28731.
    Zamani, Mohammadereza
    et al.
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing. Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting. School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Iran.
    Amadeh, A.
    School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Iran.
    Lari Baghal, S. M.
    School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Iran.
    Effect of Co content on electrodeposition mechanism and mechanical properties of electrodeposited Ni-Co alloy2016In: Transactions of Nonferrous Metals Society of China, ISSN 1003-6326, E-ISSN 2210-3384, Vol. 26, no 2, p. 484-491Article in journal (Refereed)
    Abstract [en]

    Ni-Co coatings with various cobalt contents were electrodeposited from modified Watts bath. The effect of cobalt content on electrodeposition mechanism of the coatings was studied by electro-chemical impedance spectroscopy method (EIS). Surface morphology and crystallographic structure of the coatings were investigated by means of SEM and XRD. Mechanical properties of the coatings were determined using Vickers microhardness and tensile tests. It was found that with increasing the Co2+ ions in electroplating bath, the charge transfer resistance (Rct) of Ni-Co film increased whereas the Warburg impedence decreased. This may be due to enhancement in coverage of cathode surface by Co(OH)2 and higher diffusion rate of metal ions towards cathode surface, respectively. Also, with increasing the cobalt content in the bath, cobalt content in the alloy coating increased anomalously and (111) texture consolidated gradually. With increasing the cobalt content up to 45% in alloy coating, the grain size decreased and consequently, hardness and strength of the alloy increased. Further enhancement of cobalt content up to 55% led to a little decrease in hardness and strength. The maximum ductility was observed for Ni-25%Co coating due to relatively small grain size and compact structure. © 2016 The Nonferrous Metals Society of China.

  • 28732.
    Zamani, Mohammadereza
    et al.
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
    Morini, Lorenzo
    Department of Industrial Engineering (DIN), Alma Mater Studiorum – University of Bologna, Bologna, Italy.
    Ceschini, Lorella
    Department of Industrial Engineering (DIN), Alma Mater Studiorum – University of Bologna, Bologna, Italy.
    Seifeddine, Salem
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
    The role of transition metal additions on the ambient and elevated temperature properties of Al-Si alloys2017In: Materials Science and Engineering. A, ISSN 0921-5093, Vol. 693, p. 42-50Article in journal (Other academic)
    Abstract [en]

    The principal aim of the present study was to investigate the effects of small additions of several transition metals (Zr, Ni, Ti, V, Cr, La, Y and Nb) on the microstructure, tensile properties and failure mechanisms of as-cast Al-10Si alloys at ambient and elevated temperatures (200 and 250 °C). Transition metal addition led to the formation of (AlSi)3(TiZr), (AlSi)3(CrVTi), Al13(FeCrVTi)4Si4, (AlSi)3(CrV), Al9FeNi AlNbTiZr, AlSiV, AlSiYLa and AlSiZrTiNb phases which are thermally stable until incipient melting of the eutectic compound occurs. Addition of Zr, Ni, Ti, V and Cr gave a substantial improvement in tensile strength at 250 °C, but at the expense of reduced ductility. The strength of transition metals-containing alloys is strongly governed by the size and morphology rather than the volume fraction of the intermetallic phases formed. Large and irregular particles such as (AlSi)3(TiZr), (AlSi)3(CrVTi), AlNbTiZr and AlSiV provided inhomogeneity in the α-Al matrix and act as the principal source of stress concentration, playing an active role in crack initiation. Crack propagation was primarily controlled by plastic deformation of high cooling rate-refined dendrites and modified eutectic silicon particles.

  • 28733.
    Zamani, Mohammadreza
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Al-Si Cast Alloys - Microstructure and Mechanical Properties at Ambient and Elevated Temperature2015Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    Aluminium alloys with Si as the major alloying element form a class of material providing the most significant part of all casting manufactured materials. These alloys have a wide range of applications in the automotive and aerospace industries due to an excellent combination of castability and mechanical properties, as well as good corrosion resistance and wear resistivity. Additions of minor alloying elements such as Cu and Mg improve the mechanical properties and make the alloy responsive to heat treatment. The aim of this work is studying the role of size and morphology of microstructural constituents (e.g SDAS, Si-particles and intermetalics) on mechanical properties of Al-Si based casting alloy at room temperatures up to 500 ºC.

    The cooling rate controls the secondary dendrite arm spacing (SDAS), size and distribution of secondary phases. As SDAS becomes smaller, porosity and second phase constituents are dispersed more finely and evenly. This refinement of the microstructure leads to substantial improvement in tensile properties (e.g. Rm and εF). Addition of about 280 ppm Sr to EN AC- 46000 alloy yields fully modified Si-particles (from coarse plates to fine fibres) regardless of the cooling conditions. Depression in eutectic growth temperature as a result of Sr addition was found to be strongly correlated to the level of modification irrespective of coarseness of microstructure. Modification treatment can improve elongation to failure to a great extent as long as the intermetallic compounds are refined in size.

    Above 300 ºC, tensile strength, Rp0.2 and Rm, of EN AC-46000 alloys are dramatically degraded while the ductility was increased. The fine microstructure (SDAS 10 μm) has superior Rm and ductility compared to the coarse microstructure (SDAS 25 μm) at all test temperature (from room to 500 ºC). Concentration of solutes (e.g. Cu and Mg) in the dendrites increases at 300 ºC and above where Rp0.2 monotonically decreased. The brittleness of the alloy below 300 ºC was related to accumulation of a high volume fraction damaged particles such as Cu- Fe-bearing phases and Si-particles. The initiation rate of damage in the coarse particles was significantly higher, which enhances the probability of failure and decreasing both Rm and εF compared to the fine microstructure. A physically-based model was adapted, improved and validated in order to predict the flow stress behaviour of EN AC- 46000 cast alloys at room temperature up to 400 ºC for various microstructures. The temperature dependant variables of the model were quite well correlated to the underlying physics of the material

  • 28734.
    Zamani, Mohammadreza
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    Al-Si Cast Alloys - Microstructure and Mechanical Properties at Ambient and Elevated Temperatures2017Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Swedish industry is a global leader in development and manufacture of automotive and aviation components where the usage of aluminium products is remarkable. In addition to manufacturing aluminium components, casting enables low-cost and low-emission production of complex geometry components with a range of sizes. Aluminium with Si as the major alloying element forms a class of alloys representing the most significant fraction of all cast products, for a wide range of applications due to an excellent combination of castability and mechanical properties, as well as good corrosion resistance, wear resistance and recyclability. The microstructure in Al-Si alloys strongly governs their mechanical properties. Several industrial practices such as eutectic modification and alloying are well-known to improve mechanical properties. Al-Si cast alloys generally suffer a lack of ductility and poor high temperature properties due to presence of either brittle or thermally unstable phases. The aim of this work is to study the explicit role of each microstructural constituent on the behaviour of Al-Si cast alloys at room and high temperatures. The results will accordingly highlight the potential for improvement in properties of such alloys.

    Casting defects have an immediate and negative effect on the properties of Al-Si alloys and reducing the overall level of defects substantially improves tensile properties. An increased cooling rate refines all microstructural features and reduces volumetric porosity which leads to substantial improvement in tensile properties (e.g. Rm and εF) at any test temperature. Modification of eutectic Si-particles (through Sr-addition) generally has a positive effect on alloy ductility. Depression in eutectic growth temperature as a result of eutectic modification was found to be strongly correlated to the level of modification irrespective of coarseness of the microstructure.

    Addition of transition metals (Ni-Ti-Zr-Cr-V) to Al-Si improves tensile strength, particularly at temperatures above 200 ºC caused by formation of thermally stable intermetallic compounds. Below 200 ºC however, a substantial potential for improvement through solute-reinforcement was obtained.

    A physically-based constitutive model with a wide validity range was successfully developed to describe the flow behaviour of Al-Si alloys at different temperatures, as a reliable input for finite element simulation. 

  • 28735.
    Zamani, Mohammadreza
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    Dini, Hoda
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    Svoboda, Ales
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    Lindgren, Lars-Erik
    Division of Mechanics of Solid Materials, Luleå University of Technology, Luleå, Sweden.
    Seifeddine, Salem
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    Andersson, Nils-Eric
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    Jarfors, Anders
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    A dislocation density based constitutive model for as-cast Al-Si alloys: Effect of temperature and microstructure2017In: International Journal of Mechanical Sciences, ISSN 0020-7403, E-ISSN 1879-2162, Vol. 121, p. 164-170Article in journal (Refereed)
    Abstract [en]

    The flow stress of an as-cast Al-Si based alloy was modeled using a dislocation density based model. The developed dislocation density-based constitutive model describes the flow curve of the alloy with various microstructures at quite wide temperature range. Experimental data in the form of stress-strain curves for different strain rates ranging from 10−4 to 10−1 s−1 and temperatures ranging from ambient temperature up to 400 °C were used for model calibration. In order to model precisely the hardening and recovery process at elevated temperature, the interaction between vacancies and dissolved Si was included. The calibrated temperature dependent parameters for different microstructure were correlated to the metallurgical event of the material and validated. For the first time, a dislocation density based model was successfully developed for Al-Si cast alloys. The findings of this work expanded the knowledge on short strain tensile deformation behaviour of these type of alloys at different temperature, which is a critical element for conducting a reliable microstructural FE-simulation.

  • 28736.
    Zamani, Mohammadreza
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    Seifeddine, Salem
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    A Novel Approach for the Assessment of Eutectic Si Modification and Tensile Properties of Al-Si Cast Alloys2015Conference paper (Refereed)
    Abstract [en]

    This study presents a correlation between the depression in eutectic growth temperature, as a result of modification, and the tensile properties of Al-Si cast alloys. In order to study the role that Sr exerts on the solidification behavior, modification and mechanical properties, controlled solidification experiments accompanied with thermal analysis using three mold materials for various cooling conditions, and tensile testing were conducted on Al-Si alloys with several Sr levels (~ 35-500 ppm). The gradient solidification technique was applied to produce directional solidified tensile test specimens comprising low level of defects. The depression in growth temperature of eutectic Si was found to be correlated with the Sr additions and the tensile properties (e.g. elongation to failure and tensile strength). 

  • 28737.
    Zamani, Mohammadreza
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    Seifeddine, Salem
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    Assessment of modification level in En AC-46000 aluminum casting alloy using thermal analysis and microscopic evaluation2015In: Light Metals 2015, The Minerals, Metals, and Materials Society, 2015, p. 955-960Conference paper (Refereed)
    Abstract [en]

    The quantitative methods for controlling and predicting the level of Si modification in EN AC-46000 aluminum cast alloys were examined using thermocouples (thermal analysis) and optical microscopy (image analysis). A wide range of Sr, from 37 to 486 ppm, was added to the alloy. The alloys were cast using three different molds providing different cooling rate and consequently varied microstructure coarseness. Large difference in nucleation and growth temperature of unmodified and modified alloy was found irrespective of coarseness of microstructure. The depression in growth temperature of eutectic Si found to be strongly correlated to content of modification agent as well as modification level. Thermal analysis technique was realized as a non-biased, accurate and inexpensive approach for on-line prediction of Si modification level in the EN AC-46000 alloy cast under different cooling rate.

  • 28738.
    Zamani, Mohammadreza
    et al.
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
    Seifeddine, Salem
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    Determination of Optimum Sr Level for Eutectic Si Modification in Al–Si Cast Alloys Using Thermal analysis and Tensile Properties2016In: International Journal of metalcasting, ISSN 1939-5981, E-ISSN 2163-3193, Vol. 10, no 4, p. 457-465Article in journal (Refereed)
    Abstract [en]

    This study presents a correlation between the depression in eutectic growth temperature as a result of Sr modification and the tensile properties of Al–Si cast alloys. In order to study the role that Sr exerts on the solidification behavior, modification and mechanical properties, controlled solidification experiments including thermal analysis were performed. Using three mold materials for different cooling rates, tensile testing was conducted on Al–Si alloys with various Sr levels (~35–500 ppm). The gradient solidification technique was used to produce directionally solidified tensile test specimens containing low levels of defects. The depression in eutectic Si growth temperature was correlated with the Sr additions and the tensile properties (elongation to failure and tensile strength).

  • 28739.
    Zamani, Mohammadreza
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    Seifeddine, Salem
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    Aziziderouei, Mana
    The role of Sr on microstructure formations and mechanical properties of  Al-Si-Cu-Mg casting alloy2013Conference paper (Refereed)
    Abstract [en]

    The aim of the paper is to assess the role of Sr modification on eutectic Si, Fe-rich intermetallics and porosity and their responses to the mechanical properties of a commercial high pressure die cast alloy Al-Si-Cu-Mg with Fe level up to 1%. Tensile test samples with a variety of coarsenesses, containing different Sr levels were cast using the gradient solidification technique, that enables a study of the solely influence of Sr on microstructure and tensile properties. The modification altered the morphology and size of eutectic silicon, as well as the characteristics and distribution of Fe-rich intermetallic and porosity. The tensile test results indicate that eutectic Si modification is not a guarantee for improved mechanical properties due to the presence of a variety of Fe-intermetallics and porosity that tend to have a larger role on initiating and propagating cracks leading to premature failures in these commercial alloys.

  • 28740.
    Zamani, Mohammadreza
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    Seifeddine, Salem
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    Aziziderouei, Mona
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    The role of Sr on microstructure formation and mechanical properties of Al-Si-Cu-Mg cast alloy2013In: TMS Light Metals, 2013, p. 297-302Conference paper (Refereed)
    Abstract [en]

    The aim of this paper is to assess the role of Sr modification on eutectic Si, Fe-rich intermetallic phases and porosity and their responses to the mechanical properties of a commercial high pressure die cast alloy Al-Si-Cu-Mg with Fe level up to 1%. Tensile test samples with a variety of coarsenesses, containing different Sr levels were cast using the gradient solidification technique, that enables a study of the solely influence of Sr on microstructure and tensile properties. The modification altered the morphology and size of eutectic silicon, while did not make a significant change on morphology of Fe-rich intermetallic and volume fraction distribution of porosity. The tensile test results indicate that eutectic Si modification is not a guarantee for improved mechanical properties due to the presence of a variety of intermetallics that tend to have a larger role on initiating and propagating cracks leading to premature failures in these commercial alloys.

  • 28741.
    Zamani, Mohammadreza
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    Seifeddine, Salem
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    EW Jarfors, Anders
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    Effects of microstructure and defects on tensile and fracture behaviour of a HPDC component: Potential properties and actual outcome of En AC-44300 alloy2014In: Light Metals 2014 / [ed] J. F. Grandfield, John Wiley & Sons, 2014Conference paper (Refereed)
    Abstract [en]

    The aim of present work is to study the influence of microstructure and defects on the mechanical properties of a structural high pressure die cast (HPDC) component of a commercial Al-Si based foundry alloy, EN AC-44300. The alloy which contains mainly 12% Si and 0.7% Fe, is a successful application of a die-casting alloy for the automotive market. Tensile test specimens were extracted from both high pressure die cast components and from ones with comparable microstructures produced through gradient solidification technique, which offers specimens with low levels of defects. The microstructure and defects available in the component were well mapped via X-ray inspection system, optical and scanning electron microscopy.  The results clearly confirmed the components’ performance dependency to configuration of defects and Si morphology as well as revealed the potential of the alloy in terms of ultimate tensile strength and ductility.

  • 28742.
    Zamani, Mohammadreza
    et al.
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
    Seifeddine, Salem
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    Ghassemali, Ehsan
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    Effect of cooling rate and eutectic modification on texture and grain structure of Al-Si-Cu-Mg die cast alloy2016In: La Metallurgia Italiana, ISSN 0026-0843, Vol. 108, no 6, p. 5-8Article in journal (Refereed)
    Abstract [en]

    The effect of cooling rate and eutectic modification on texture evolution and grain structure of an Al-Si-Cu-Mg die cast alloy were investigated using optical microscopy (OM) and electron backscatter diffraction (EBSD) techniques. Directional solidification technique was utilized to produce as-cast specimens having low level of casting defects with controlled microstructural scale: specimens with average SDAS of 10 and 25 µm. Mode of solidification, cooling rate and eutectic modification did not induce any significant texture in the microstructure. An increase in cooling rate resulted in reduction grain size. High degree of grains orientation randomness was found in high cooling rate regardless of modification treatment.

  • 28743.
    Zamani, Mohammadreza
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    Seifeddine, Salem
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    Jarfors, Anders
    Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
    High Temperature Tensile Deformation Behaviour and Failure Process of an Al-Si-Cu-Mg Cast Alloy: The Microstructural Scale Effect2015In: Materials & design, ISSN 0264-1275, E-ISSN 1873-4197, Vol. 86, p. 361-370Article in journal (Refereed)
    Abstract [en]

    In this study the high temperature tensile deformation behavior of a commercial Al–Si–Cu–Mg cast alloy was investigated. The alloy was cast with two different cooling rates which resulted in average secondary dendrite arm spacing of 10 and 25 μm, which is typical of the microstructure scale obtained from high pressure die casting and gravity die casting. Tensile tests were performed at different strain rates (10− 4 s− 1 to 10− 1 s− 1) and over a wide temperature range from ambient temperature to 500 °C. The fine microstructure had superior tensile strength and ductility compared to the coarse microstructure at any given temperature. The coarse microstructure showed brittle fracture up to 300 °C; the fracture mode in the fine microstructure was fully ductile above 200 °C. The fraction of damaged particles was increased by raising the temperature and/or by microstructure coarsening. Cracks arising from damaged particles in the coarse microstructure were linked in a transgranular-dominated fashion even at 500 °C. However, in the fine microstructure alloy the inter-dendritic fracture path was more prevalent. When the temperature was raised to 300 °C, the concentration of alloying elements in the dendrites changed. The dissolution rates of Cu- and Mg-bearing phases were higher in the fine microstructure.

  • 28744.
    Zamani, Mohammadreza
    et al.
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
    Toschi, Stefania
    Department of Industrial Engineering (DIN), Alma Mater Studiorum - University of Bologna, Bologna, Italy.
    Morri, Alessandro
    Department of Industrial Engineering (DIN), Alma Mater Studiorum - University of Bologna, Bologna, Italy.
    Ceschini, Lorella
    Department of Industrial Engineering (DIN), Alma Mater Studiorum - University of Bologna, Bologna, Italy.
    Seifeddine, Salem
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
    Optimisation of heat treatment of Al–Cu–(Mg–Ag) cast alloys2019In: Journal of thermal analysis and calorimetry (Print), ISSN 1388-6150, E-ISSN 1588-2926Article in journal (Refereed)
    Abstract [en]

    The optimisation of heat treatment parameters for Al–Cu–(Mg–Ag) cast alloys (2xxx) having different microstructural scales was investigated. Thermo-Calc software was used to design optimal alloy compositions. Differential scanning calorimetry (DSC), scanning electron microscopy and wavelength-dispersive spectroscopy technique were employed to determine proper solution heat treatment temperature and homogenisation time as well as incidence of incipient melting. Proper artificial ageing temperature for each alloy was identified using DSC analysis and hardness measurement. Microstructural scale had a pronounced influence on time and temperature required for complete dissolution of Al2Cu and homogenisation of Cu solute atoms in the α-Al matrix. Refined microstructure required only one-step solution treatment and relatively short solution treatment of 10 h to achieve dissolution and homogenisation, while coarser microstructures desired longer time. Addition of Mg to Al–Cu alloys promoted the formation of phases having a rather low melting temperature which demands multi-step solution treatment. Presence of Ag decreases the melting temperature of intermetallics (beside Al2Cu) and improvement in age-hardening response. Peak-aged temperature is primarily affected by the chemical composition rather than the microstructural scale. 

  • 28745.
    Zamecki, Adam
    et al.
    Jönköping University, Jönköping International Business School.
    Denis, Skrijelj
    Boards in Swedish Family SMEs: The Recruitment of External Board Members2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
  • 28746.
    Zamora Barberá, Ana
    Jönköping University, School of Education and Communication, HLK, Media and Communication Studies.
    Excellence, uniqueness and elites: Constructing Spain through nation branding on the website Marca España2016Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    One of the most interesting approaches on how we perceive nations today is the idea of imagining nations as brands. Nation branding is used by many governments as a tool for the dissemination of a certain nation imagery. From a media approach, this thesis explores the notion of nation branding as ideologically loaded in media discourse, and the official web discourse on Spain serves as a case. Specifically, the thesis reveals the media construction of Spain on the official website marcaespaña.es, exploring its relation to national identities and the underlying ideologies behind the online selfrepresentation. The thesis draws on the concepts of nation, national identities, ideology and discourse, relating them to nation branding from a critical perspective. To do so, the thesis employs Critical Discourse Analysis as method for analyzing national narratives, where nation branding discourse is seen as a social practice that legitimizes certain ideologies and power relations. The study concludes that the Spanish construction, portraying Spain as unique and united, reduces its national identity to an excellence and elite discourse, ignoring the complex reality of the nation. The thesis shows how this way of constructing the nation serves, through a website, to legitimize the current economical and political system, including the current government and the Spanish nationalism.

  • 28747.
    Zander, Lena
    et al.
    Uppsala University.
    Butler, Christina
    Storbritannien.
    Mockaitis, Audra
    Australien.
    Herbert, Kendall
    Australien.
    Lauring, Jakob
    Danmark.
    Mäkelä, Kristiina
    Finland.
    Paunova, Minna
    Danmark.
    Umans, Timurs
    Högskolan Kristianstad, Avdelningen för Ekonomi.
    Zettinig, Peter
    Finland.
    Team-based global organizations: the future of global organizing2015In: The future of global organizing: progress in international business research / [ed] Verbeke, Alain, van Tulder, Rob, Drogendijk, Rian, Bingley: Emerald Group Publishing Limited, 2015, 10, p. 227-243Chapter in book (Refereed)
    Abstract [en]

    Purpose

    We propose team-based organizing as an alternative to more traditional forms of hierarchy-based organizing in global firms.

    Methodology/approach

    Advancements in the study of global teams, leadership, process, and outcomes were organized into four themes: (1) openness toward linguistic and value diversity as enhancing team creativity and performance, (2) knowledge sharing in team-based organizations, (3) the significance of social capital for global team leader role success, and (4) shared leadership, satisfaction, and performance links in global virtual teams.

    Findings

    We identify questions at three levels for bringing research on team-based organizing in global organizations forward. At the within-team individual level, we discuss the criticality of process and leadership in teams. At the between-teams group level, we draw attention to that global teams also need to focus on relationships and interactions with other teams within the same global firm, for example, when sharing knowledge. With respect to the across-teams organizational level, we highlight how bringing people together in global teams from different organizational units and cultures creates the potential for experiential individual and team-based learning, while making the firm more flexible and adaptable.

    Theoretical implications

    The potential of the relatively underexplored idea of global team-based firms as an alternative to hierarchy open up questions for empirical research, and further theorizing about the global firm.

    Practical implications

    Practitioners can learn about organizational, team, and individual challenges and benefits of global team-based organizing.

    Originality/value

    A century-old dominant organizational form is challenged when moving away from hierarchy- and hybrid-based forms of organizing toward team-based global organizing of work.

  • 28748.
    Zander, Patrik
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Hammarström, Johan
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Värmebehandling av segjärn med hög kiselhalt2011Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The background to this thesis was that Qumex Materialteknik at several occasions had received material of type SS 0725 that had shown deficient heat treatment results. The material, which is relatively new, is a cast iron of type ductile iron and differ against other ductile irons because of its high silicon content. According to EN standard ductile irons are classified by their mechanical properties. A problem then occurs with the new material SS 0725 because of this. The material fulfils the requirements for EN-GJS-500-7 and is therefore in the same classification as a ductile iron with much lower silicon content. Two materials having major differences in chemical composition ending up in the same classification can be problematic. The purpose of this report is to determine impact of high silicon content in ductile iron when heat treated and quench hardened.

    The experiment included four materials, and the major difference between the materials were their content of copper and silicon. The heat treatment process was performed at three different temperatures and three different treatment times. Afterwards the samples were quenched in oil. The ambition of the quench hardening was to obtain a material structure of 100% martensite. By optical microscopy and hardness measurements the results then were evaluated. An investigation of the phase transformation temperature in the materials was made by using Differential Scanning Calorimetry.

    The results show that the amount of silicon content has great influence on the temperature for receiving good hardening results. To achieve 100% martensite after quench hardening in materials with low silicon content the temperature needs to be over 840°C. For material with high level of silicon content the temperature for achieving 100% martensite needs to be 900°C and the treatment time should be over 1 h. The relative difference in phase transformation temperature was measured using Differential Scanning Calorimetry. The results of the measurements between the materials with high silicon content and materials with low silicon content was 45°C. This result combined with the analysis of the heat treatment process shows that a major increase of the temperature is needed to heat treat SS 0725.

  • 28749.
    Zander, Ulf
    Jönköping University, School of Education and Communication, HLK, Disciplinary Research.
    Clio på bio: Om amerikansk film, historia och identitet2006Book (Other (popular science, discussion, etc.))
  • 28750.
    Zander, Ulf
    Jönköping University, School of Education and Communication, HLK, Disciplinary Research.
    Fornstora dagar, moderna tider: Bruk av och debatter om svensk historia från sekelskifte2001Doctoral thesis, monograph (Other scientific)
572573574575576577578 28701 - 28750 of 29187
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