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  • 1.
    Ainegren, Mats
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Tuplin, Simon
    Loughborough University, Loughborough, UK.
    Carlsson, Peter
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Render, Peter
    Loughborough University, Loughborough, UK.
    Design and development of a climatic wind tunnel for physiological sports experimentation2019Inngår i: Proceedings of the Institution of Mechanical Engineers, Part P: Journal of Sports Engineering and Technology, ISSN 1754-3371, Vol. 233, nr 1, s. 86-100Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The aim of this project was to develop a wind tunnel that enables the study of human performance during various types ofsports and physical activities by examining the influence of aerodynamic drag, precipitation, frictional forces and gravitationalforces on uphill and downhill travel on a moving substrate. An overall design for a wind tunnel and working section containinga large treadmill was drafted, followed by computational fluid dynamics simulations of flow conditions to assess thedesign’s feasibility and select from different geometries prior to its construction. The flow conditions in the completed windtunnel were validated using different flows, speeds and treadmill inclinations. Pilot experiments were carried out using across-country skier to investigate the effect of aerodynamic drag on oxygen uptake during double poling and the maximalachieved speed when rolling on a declined treadmill. The purpose was to validate the usefulness of the tunnel. The resultsshowed that flow conditions are acceptable for experiments even in worst-case scenarios with maximal inclined and declinedtreadmill. Results also showed that aerodynamic drag has a significant impact on the skier’s energy expenditure.

  • 2.
    Björklund, Glenn
    et al.
    Mittuniversitetet, Fakulteten för humanvetenskap, Institutionen för hälsovetenskap.
    Danvind, Jonas
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Sundström, David
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    The effect of speed and gradient on running economy and oxygen uptake during downhill running2019Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Downhill running poses challenges were the gradient is of importance for energy cost and oxygen uptake. While demonstrated that downhill running at a slight gradient is most efficient, the energy cost increases with a steeper gradient (1). However, the additional effect of running speed has not been studied for downhill running. Therefore, the aim of the study was to analyse the combined effect of gradient and speed in downhill running on oxygen cost and running economy. METHODS:Runners (n=6) were recruited for the study and performed 1) VO2max and running economy (J·kg-1·m-1) tests and 2) an experimental running protocol at two speeds,12 km·h-1 and 80% of the speed at VO2max (V80) and three gradients (0, -5° and -10°). V80 was higher than 12 km·h-1 for all participants. All testing was performed on a large treadmill 3x5 m (Rodby, Sweden) that were controlled for speed and gradient. The experimental protocol was performed continuously with 5 min at each workload in a randomized order, 30 min in total. VO2 was measured throughout the experimental protocol using a mixing chamber (Moxus Metabolic Cart, USA). RESULTS:VO2 expressed as ml·kg-1·min-1 increased because of speed (F1,5=27.8, p=0.003) and decreased with gradient (F1,5=87.6, p<0.001). Between -5° and -10°, VO2 decreased less during V80 compared to 12 km·h-1 shown by an interaction (F2,10=7.9, p=0.009). However, speed did not influence running economy (F1,5=0.9, p=0.38) while gradient increased running economy (F1,5=90.1, p<0.001). A non-significant interaction effect suggests a shift in running economy between -5° and -10° depending on speed (F2,10=3.5, p=0.07). The running economy at V80 was higher compared to 12 km·h-1 at -5° but reversed at -10°. While a relation between running economy at V80 -10°, V80 -5° and 12 km·h-1 -10° (rs>0.88, p<0.019) was found, no relations between running economy on level terrain and steep downhill running (-10°) were recognised. CONCLUSION:While we found no effect on running economy from speed alone, we did see a shift in the running economy for different speeds at an increased downhill gradient. This indicates that a high speed (V80) is more efficient at moderate downhill gradients, while a lower speed (12 km·h-1) is more efficient in steeper downhill gradients. While previous research demonstrate that gradient is of great influence to running economy, the findings of this study suggest that speed also affects the running economy in downhill running.

  • 3.
    Botero, Carlos
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Bäckström, Mikael
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Rännar, Lars-Erik
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Roos, Stefan
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Koptyug, Andrey
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Åsvik, Kenneth
    Uddeholms AB.
    Şelte, A
    Uddeholms AB.
    Ramsperger, Markus
    Arcam AB.
    Additive Manufacturing of a cold work steel using Electron Beam Melting2019Inngår i: Proceedings of Conference:  Tooling 2019, 2019, Vol. MayKonferansepaper (Fagfellevurdert)
  • 4.
    Botero Vega, Carlos Alberto
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Ramsperger, Markus
    Arcam AB, Mölnlycke.
    Selte, Aydin
    Uddeholms AB, Hagfors.
    Åsvik, Kenneth
    Uddeholms AB, Hagfors.
    Koptioug, Andrei
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Skoglund, Per
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Roos, Stefan
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Rännar, Lars-Erik
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Bäckström, Mikael
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Additive Manufacturing of a Cold-Work Tool Steel using Electron Beam Melting2019Inngår i: Steel Research International, ISSN 1611-3683, E-ISSN 1869-344X, s. 1-6, artikkel-id 1900448Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Metal additive manufacturing (AM) is on its way to industrialization. One of the most promising techniques within this field, electron beam melting (EBM), is nowadays used mostly for the fabrication of high‐performance Ti‐based alloy components for the aerospace and medical industry. Among the industrial applications envisioned for the future of EBM, the fabrication of high carbon steels for the tooling industry is of great interest. In this context, the process windows for dense and crack‐free specimens for a highly alloyed (Cr–Mo–V) cold‐work steel powder are presented in this article. High‐solidification rates during EBM processing lead to very fine and homogeneous microstructures. The influence of process parameters on the resulting microstructure and the chemical composition is investigated. In addition, preliminary results show very promising mechanical properties regarding the as‐built and heat‐treated microstructure of the obtained material.

  • 5.
    Bäckström, Ingela
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Health-related quality management values: comparing manager and co-worker perceptions2019Inngår i: International Journal of Quality and Service Sciences, ISSN 1756-669X, E-ISSN 1756-6703, Vol. 11, nr 4, s. 588-603Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Purpose – The purpose of this paper was to modify an existing survey that measures co-worker perceptions of health-related quality management (QM) values and perceived health and to measure both co-worker and manager perceptions of those values. The purpose was also to test the modified survey and then compare theresults from managers and co-workers from two organizations in which the survey has been used to measure baseline data in a lean research project and to help managers understand the areas where improvement isneeded. Design/methodology/approach – An earlier survey measuring co-worker perception of the dimensions of the health-related QM values “leadership commitment” and “participation of everybody” has been developed with corresponding statements for managers. The results of the survey were analyzed using SPSS(Statistical Package for the Social Sciences), the Cronbach’s alpha coefficient was calculated for each of thedimensions, and the correlations between the dimensions and the health index were investigated using the Pearson correlation. The mean and standard deviation were also calculated. Findings – The modified survey is presented in the paper, and the results demonstrate that the managers’ perception of the presence of health-related QM values is higher than that of the co-workers. Seeing the leadership from the co-workers’ standpoint compared with the managers’ perspective provides novel insight for both the researcher and the managers. Originality/value – Leaders in organizations must develop greater efficiency to improve operational performance and develop healthy work environments. Practicing QM can benefit performance and is central for inspiring quality and efficiency within organizations, as well as for enhancing co-worker well-being. Earlier research found relationships between co-workers’ perception of their health and the health-related QMvalues “leadership commitment” and “participation of everybody.” With the survey presented in this paper, it is possible to measure these health-related QM values and provide a comparison between manager and coworker perceptions.

  • 6.
    Bäckström, Ingela
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Ingelsson, Pernilla
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Johansson, Catrin
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för medie- och kommunikationsvetenskap.
    Hamrin, Solange
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för medie- och kommunikationsvetenskap.
    Bergman, Sandra
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för medie- och kommunikationsvetenskap.
    Communicative Leadership development conduction to impact on   Quality culture and co-worker health2019Inngår i: 22nd QMOD conference on Quality and Service Sciences ICQSS 2019, 13-15 October: Leadership and strategies for Sustainable Quality and Innovation in the 4th Industrial Revolution / [ed] Su Mi Daahlgard-Park, Jens J. Dahlgaard,, Lund, 2019, Vol. 22Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Purpose – The purpose of this paper explore effects of a communicative leadership development program in an organization and to present and discuss results from assessing Quality Culture and co-worker health in the same organization.

     

    Methodology/approach –  In a company conducted a communicative leadership developing program, a questionnaire measuring QM values and co-worker health has been handed out to leaders and co-workers. Leaders conducted a communicative leadership developing program have been interviewed and observation studies have been conducted. 

     

    Findings – The interviewed and observed leaders are working with communicative leadership in a structured way, The measured factors, assessing quality culture and co-worker health showed rather high mean values.

     

    Practical implications – The communicative leadership developing program seams to help leaders to communicate in a structured way.

  • 7.
    Bäckström, Ingela
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Ingelsson, Pernilla
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Mårtensson, Anna
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Slutrapport ”Resultatstyrning för medborgarnytta”: Ett samverkansprojekt mellan Sundsvalls kommun och Kvalitetsteknik vid Mittuniversitetet2019Rapport (Annet (populærvitenskap, debatt, mm))
  • 8.
    Carnerud, Daniel
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Text Mining The Quality Paradigm(s)2019Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    The purpose of this thesis orbits around an examination of the formation of a quality paradigm. In this inquiry, the exploration and application of text mining have been used to provide new insights into quality as a paradigm.

    The findings reveal the existence of unifying topics, around which research on quality has clustered, constituting the foundational pillars of an academic quality paradigm. These foundational pillars are operational paradigms that embody both epistemological perspectives and operational concerns regarding quality. The three operative paradigms upon which the quality paradigm rests are the operative paradigm of back-end quality (orbiting around: QM, TQM and service quality), the operative paradigm of middle-way quality (orbiting around: ISO, BEMs and Quality Awards) and the operative paradigm of front-end quality (orbiting around: Reliability, Costs and Processes). The three operative paradigms differ in their levels of abstraction, accountability and system-learning emphasis. However, the mutual purpose and aim of the three operative paradigms, and hence the paradigm as a whole, is to continuously control, assure and develop systems affecting quality initiatives in service of the customer(s).

    The findings also indicate that the operative paradigms of back-end and front-end quality seem to be specializing and drifting apart, which might lead to a division of the quality paradigm into two separate paradigms.

    The studies in this thesis also confirm the existence of changes in the focus and popularity of specific topics. However, the key epistemological findings are the central and perpetual research topics that are identified – supporting the supposition that research on quality truly constitutes a delimited and recognized research paradigm.

    Furthermore, the studies show that research on quality expanded during the end of the 1980s and beginning of the 1990s, after which a contraction took place, followed by stability at the start of the 21st century. Consequently, it is found that research on quality entered a stable and mature phase in the 21st century, settling down as a distinctive and established research paradigm.

    Finally, it is found that the exploration and application of text mining is a potent approach when probing the epistemological foundations of an academic discipline.

  • 9.
    Carnerud, Daniel
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    The quality movements three operational paradigms - A text mining ventureInngår i: Artikkel i tidsskrift (Fagfellevurdert)
  • 10.
    Carnerud, Daniel
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Bäckström, Ingela
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Four decades of research on quality: summarising, Trendspotting and looking ahead2019Inngår i: Total quality management and business excellence (Online), ISSN 1478-3363, E-ISSN 1478-3371Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The purpose of this paper is to identify and depict the key areas around which research on quality has orbited during the past 37 years. Additionally, this paper aims to explore longitudinal patterns and trends in the identified key areas. Thereby, this study aims to present new perspectives on the foundational elements and evolutionary patterns of research on quality as well as future directions. The paper applies data- and text modelling methodology to a chronological dataset covering 37 years and consisting of scientific journals specialising in research on quality; it also includes scientific journals with a broader spectrum of operations management (OM) research. The study identifies seven central topics around which research on quality has centred during this time period: Service Quality & Customer Satisfaction; Process design & Control; ISO Certification & Standards; TQM - Implementation, Performance & Culture; QM - Practices & Performance; Reliability, Costs, Failure & Problems and Excellence - BEMs, Quality Awards & Excellence in Higher Education. The results also show that the total number of entries has risen constantly since 1980; however, there was a period of decline between 2000 and 2012, indicating that after almost four decades, research on quality is still vibrant and relevant.

  • 11.
    Carnerud, Daniel
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Bäckström, Ingela
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Four Decades of Research on Quality: Summarizing, Trendspotting and Looking Ahead2018Konferansepaper (Fagfellevurdert)
  • 12.
    Cawthorn, Annika
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Sörensson, Anna
    Mittuniversitetet, Fakulteten för humanvetenskap, Institutionen för ekonomi, geografi, juridik och turism.
    Dalborg, Cecilia
    Mittuniversitetet, Fakulteten för humanvetenskap, Institutionen för ekonomi, geografi, juridik och turism.
    Grande, Jorunn
    Nord Universitet.
    GRENI – Forskningsprojekt kring gröna näringar2018Rapport (Annet (populærvitenskap, debatt, mm))
  • 13.
    Celinder, Johan
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Klang, Anders
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Processorienterad kultur: Mätmetod över beteenden som driver resultat i en processorienterad kultur2019Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Iden till arbetet fick författarna från en föreläsning om kultur (SIQ & SKI, 2018) och hur enligt Drucker kulturen i en organisation slår strategi utan problem. Syftet var att undersöka vilka beteenden som driver resultat i en processorienterad kultur, samt att utveckla en modell för att mäta detta.

     

    Målet var att mäta beteende i organisationen för att hjälpa dem skapa en konkurrenskraftigare kultur och snabbare uppnå processorientering med en enkät i en kvantitativ pilotstudie. Trots att alla svarade var populationen får pilotstudien för liten för att ge signifikanta resultat. Studien bygger på teorin om kluster av fyra tillämpningar “fumlare”, “kartläggare”, “pratare” och “organiserare” från Hellström & Eriksson (2013) och resultaten redovisas i diagram och IPA-matris.

     

    Slutasatsen är att organisationen lutar åt funktionsorientering, men strävar i riktning mot processorientering. Den sammanlagda bilden är att de tillhör klustret “pratare” med knapp marginal. De är dock på väg i riktningen att börja sin resa mot processorientering via fokus på kommunikation. Mätmodellen som används är i linje med forskning och ger svar på vilka hindrande och stödjande beteenden som finns i en organisation för en processorienterad kultur. Mätmodellen har även svagheten att den inte ger svar på andra frågor än för hörnstenen “att arbeta med processer” och att processorientering endast utgör en del av det som är en kvalitetskultur. 

  • 14.
    Chudinova, E.
    et al.
    National Research Tomsk Polytechnic University, Tomsk, Russian Federation.
    Surmeneva, M.
    National Research Tomsk Polytechnic University, Tomsk, Russian Federation.
    Koptioug, Andrei
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Loza, K.
    University of Duisburg-Essen, Essen, Germany.
    Prymak, O.
    University of Duisburg-Essen, Essen, Germany.
    Epple, M.
    University of Duisburg-Essen, Essen, Germany.
    Surmenev, R.
    National Research Tomsk Polytechnic University, Tomsk, Russian Federation.
    Surface modification of Ti6Al4V alloy scaffolds manufactured by electron beam melting2019Inngår i: / [ed] Godymchuk A.,Rieznichenko L.,Semenov M., Institute of Physics Publishing (IOPP), 2019, nr 1Konferansepaper (Fagfellevurdert)
    Abstract [en]

    In this paper, the results of the surface functionalization of the Ti6Al4V alloy scaffolds with different structures for use as a material for medical implants are presented. Radio frequency magnetron sputtering was used to modify the surface of the porous structures by deposition of the biocompatible hydroxyapatite (HA) coating with the thickness of 86050 nm. The surface morphology, elemental and phase composition of the HA-coated scaffolds were studied. According to energy-dispersive X-ray spectroscopy, the stoichiometric ratio of Ca/P for flat, orthorhombic and cubic scaffolds is 1.65, 1.60, 1.53, respectively, which is close to that of stoichiometric ratio for HA (Ca/P = 1.67). It was revealed that this method of deposition makes it possible to obtain the homogeneous crystalline coating both on the dense sample and in the case of scaffolds of complex geometry with different lattice cell structure. 

  • 15.
    Chudinova, E.
    et al.
    National Research Tomsk Polytechnic University, Tomsk, Russian Federation.
    Surmeneva, M.
    National Research Tomsk Polytechnic University, Tomsk, Russian Federation.
    Koptioug, Andrei
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Sokolova, V.
    University of Duisburg-Essen, Essen, Germany.
    Prymak, O.
    University of Duisburg-Essen, Essen, Germany.
    Bouckercha, S.
    University of Duisburg-Essen, Essen, Germany.
    Epple, M.
    University of Duisburg-Essen, Essen, Germany.
    Surmenev, R.
    National Research Tomsk Polytechnic University, Tomsk, Russian Federation.
    Determination of the properties and loading efficiency of encapsulated BSA-FITC and dexamethasone for drug delivery systems2019Inngår i: IOP Conference Series: Materials Science and Engineering, Institute of Physics Publishing (IOPP), 2019, Vol. 597, nr 1, artikkel-id 012056Konferansepaper (Fagfellevurdert)
    Abstract [en]

    In this work porous microparticles of calcium carbonate were synthesized with bovine serum albumin - fluorescein isothiocyanate conjugate (BSA-FITC) and dexamethasone, and then used for encapsulation in polymer microcapsules by means of layer-by-layer assembly (LbL). The properties of the obtained microcapsules were characterized by scanning electron microscopy, dynamic light scattering, infrared-, ultraviolet- and visible spectroscopy. According to the performed DLS measurements, an average hydrodynamic diameter ranged from 4 to 8 m and zeta-potential for all types of capsules was determined as -18 and -21 mV. BSA-FITC was encapsulated using this approach yielded a loading efficiency of 49 % protein. This value calculated for dexamethasone was of 38%. The microcapsules filled with an encapsulated drug may find applications in the field of biotechnology, biochemistry, and medicine. 

  • 16.
    Chudinova, Ekaterina A.
    et al.
    National Research Tomsk Polytechnic University, Tomsk, Russian Federation.
    Surmeneva, Maria A.
    National Research Tomsk Polytechnic University, Tomsk, Russian Federation.
    Timin, Alexander S.
    National Research Tomsk Polytechnic University, Tomsk, Russian Federation; First I. P. Pavlov State Medical University of St. Petersburg, St. Petersburg, Russian Federation.
    Karpov, Timofey E.
    Peter The Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation.
    Wittmar, Alexandra
    University of Duisburg-Essen, Essen, Germany.
    Ulbricht, Mathias
    University of Duisburg-Essen, Essen, Germany.
    Ivanova, Anna
    National Research Tomsk Polytechnic University, Tomsk, Russian Federation.
    Loza, Kateryna
    University of Duisburg-Essen, Essen, Germany.
    Prymak, Oleg
    University of Duisburg-Essen, Essen, Germany.
    Koptioug, Andrei
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Epple, Matthias
    University of Duisburg-Essen, Essen, Germany.
    Surmenev, Roman A.
    National Research Tomsk Polytechnic University, Tomsk, Russian Federation.
    Adhesion, proliferation, and osteogenic differentiation of human mesenchymal stem cells on additively manufactured Ti6Al4V alloy scaffolds modified with calcium phosphate nanoparticles2019Inngår i: Colloids and Surfaces B: Biointerfaces, ISSN 0927-7765, E-ISSN 1873-4367, Vol. 176, s. 130-139Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In the present study, biocomposites based on 3D porous additively manufactured Ti6Al4V (Ti64) scaffolds modified with biocompatible calcium phosphate nanoparticles (CaPNPs) were investigated. Ti64 scaffolds were manufactured via electron beam melting technology using an Arcam machine. Electrophoretic deposition was used to modify the scaffolds with CaPNPs, which were synthesized by precipitation in the presence of polyethyleneimine (PEI). Dynamic light scattering revealed that the CaP/PEI nanoparticles had an average size of 46 ± 18 nm and a zeta potential of +22 ± 9 mV. Scanning electron microscopy (SEM) revealed that the obtained spherical CaPNPs had an average diameter of approximately 90 nm. The titanium-based scaffolds coated with CaPNPs exhibited improved hydrophilic surface properties, with a water contact angle below 5°. Cultivation of human mesenchymal stem cells (hMSCs) on the CaPNPs-coated Ti64 scaffolds indicated that the improved hydrophilicity was beneficial for the attachment and growth of cells in vitro. The Ti6Al4V/CaPNPs scaffold supported an increase in the alkaline phosphatase (ALP) activity of cells. In addition to the favourable cell proliferation and differentiation, Ti6Al4V/CaPNPs scaffolds displayed increased mineralization compared to non-coated Ti6Al4V scaffolds. Thus, the developed composite 3D scaffolds of Ti6Al4V functionalized with CaPNPs are promising materials for different applications related to bone repair. 

  • 17.
    Göransson, Cathrine
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Jonback, Elisabeth
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    NumberONE, med visionen att bli Sveriges bästa bostadsbolag: Enfallstudie om kvalitets- och verksamhetsutveckling2018Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Att göra kvalitets- och verksamhetsutveckling   till en ledningsfråga har skattats som en av de största utmaningarna av   chefer och ledare. Offensiv kvalitetsutveckling är en vedertagen modell som   grundar sig på värderingar, arbetssätt och verktyg vilka har en avgörande   betydelse för framgångsrik kvalitets- och verksamhetsutveckling. I kvalitets-   och verksamhetsutvecklingen kan olika modeller såsom ISO 9001 och SIQ   Managementmodell ge stöd i utvecklingen. Den här studien inriktar sig mot SIQ   Managementmodell som är en excellencemodell. Syftet med denna studie har varit att öka förståelsen för hur   ledningen kan arbeta med kvalitets- och verksamhetsutveckling samt vilka   faktorer som påverkar arbetet. Studien genomfördes på Bostads AB Mimer som   2018 fick Erkännande för framgångsrik verksamhetsutveckling från SIQ. Studien   genomfördes som en kvalitativ studie där elva ledare intervjuades med   semistrukturerade frågeguider. Dokument och skriven information från   företaget har också analyserats. Resultatet visar att en engagerad   företagsledning gynnar kvalitets- och verksamhetsutvecklingen. Mimer har även   haft en etablerad värdegrund, fyra tydliga mål och en dedikerad kvalitetsutvecklare.   Det framkom även utmaningar där den största var upplevelsen av att arbetet   var tidskrävande.

     

  • 18.
    Hansen, David
    et al.
    Aalborg University.
    Lilja, Johan
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Complexity Quality Management: Enabling Leadership, Adaptive Space & Metaphors2019Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Purpose

    Most organizations experience the complexity and tensions between producing and innovating. In order to adapt to the future, these organizations need enabling leadership that creates adaptive space to facilitate and enable the necessary change process for renewal. This ability is necessary for 21st century TQM, i.e., the Emergence TQM paradigm. Guiding images such as metaphors have been suggested to support transformative change, but have only received limited research. This paper investigates the role of guiding images as a facilitating tool for leading organizational adaptability and contribute to future leadership practices of QM.

    Design/methodology/approach

    The paper studies three cases of organizations that were under pressure from the outside to make decisions about how to innovate. The paper studies the management team at each organization while they tackle tensions and make decisions about what to do while using a generative image to support the leadership process. The researchers gained access to key meetings to study the processes through observations that were later analyzed with the use of storyboards.

    Findings

    The leadership processes of handling organizational adaptability can be facilitated by guiding images. The images can be generated while managers experience tension and can help support the leadership processes of conflicting and connecting. Three types of guiding images were identified.

    Originality/value

    The paper contributes with practical knowledge about how to enabling organizational adaptability by supporting enabling leadership processes. Furthermore, the paper contributes to complex adaptive leadership theory in the context of quality management.

  • 19.
    Hedlund, Christer
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Stenmark, Petter
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Exploring the Impact of Consumer Attitudes on Reusage and Waste Prevention2019Inngår i: 22nd QMOD conference: Conference on Quality and Service Sciences ICQSS 2019, 13-15 October 2019, Krakow, Poland / [ed] Su Mi Dahlgaard-Park & Jens J. Dahlgaard, 2019Konferansepaper (Annet vitenskapelig)
    Abstract [en]

    Circular economy is a concept whereby organic and extracted materials are used and reused in balanced material loops. As a first step in the concept, effective waste disposal and recycling is proposed, however waste prevention is substantially more effective than waste disposal. This study has investigated current attitudes towards reusing products. The study was conducted at and in the vicinity of a Swedish recycling center.

    The concept of waste threshold has been investigated and suggestions have been made on how to improve the waste value chain by keeping the value of objects as high as possible and allowing for the interchange of second-hand items at the recycling center. In the study the most common obstacle to reusing is stigmatized attitudes towards reusage and the learned behavior ‘We are so used to buying new things…’. 

  • 20.
    Häggström, Marie
    et al.
    Mittuniversitetet, Fakulteten för humanvetenskap, Institutionen för omvårdnad.
    Sten, Lilly-Mari
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Bäckström, Ingela
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Ingelsson, Pernilla
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    How to improve the transfer process from intensive care to general wards - listening to the co-workers2019Inngår i: Leadership and strategies for Sustainable Quality and Innovation in the 4th Industrial Revolution. Lund, Lund, 2019Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Background - Many errors and threats to patient safety are caused by deficiencies in the organization, such as inadequate procedures, inadequate planning and lack of information or communication. A specific danger to patient safety is the various gaps in the continuity of care. An example of the gap is the transfer of patients from the high-tech intensive care environment to the less frequent personnel ward environment, a process called ICU transitional care. ICU-nurses, ward-nurses, physicians, and other healthcare professionals, may provide this care. The effects of a poorly coordinated discharge can lead to readmission to the ICU and avoidable deaths.This study is a part of a research project financed by The Kamprad Family Foundation, with a purpose to gain new knowledge about how efficiency and quality in patient transfers within healthcare care can be improved. The purpose will be achieved through cooperation between the two research subjects Quality Management and Nursing science.Purpose - The purpose of this paper was to gain knowledge about how to improve patient transfers from intensive care to the general ward, by describing the intensive care co-workers generated suggestions.Methodology/approach – Six interdisciplinary focus groups interviews were conducted with co-workers at two hospitals in Sweden. The interviews were taped, verbatim transcribed and analysed with a mixed method. The QM values: ‘customer focus’, ‘leadership commitment’, ‘participation of everybody’, ‘continuous improvement’, ‘process focus’ and ‘base decisions on facts’ were used as an analytic framework.Findings - The co-workers suggested that the process should be defined and structured. The analyses showed a total of 94 suggestions that mainly were focused at following areas; planning, information, and communication, interest in the transfer process, enough resources, standardize and create routines, learning, follow up and evaluate.Practical implications - ICU transitional care is multifaceted and needs a holistic, system thinking solution. The findings indicate that the process could be safer, and more efficient by implementing the co-worker generated suggestions. The suggestions can be used to improve patients’ transfers in many contexts in healthcare, not only ICU transitional care.

  • 21.
    Ingelsson, Pernilla
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Sten, Lilly-Mari
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Bäckström, Ingela
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Häggström, Marie
    Mittuniversitetet, Fakulteten för humanvetenskap, Institutionen för omvårdnad.
    Assessing Quality Management culture in order to develop ICU transitional care2019Inngår i: 22nd QMOD conference: Quality and Service Sciences ICQSS 2019 / [ed] Su Mi Dahlgaard-Park, 2019Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Purpose - The purpose of this paper is to present and analyse the result from using a questionnaire measuring the presence of a number of QM values, as well as the use of Appreciative Inquiry (AI) and the feeling of pride in a healthcare setting focusing on transitional care.

     

    Methodology/approach – Co-workers at two different hospital’s intensive care units answered a previously developed and tested questionnaire. A new factor was developed in order to measure customer focus in the healthcare context. The result was analysed using SPSS with the aim of finding areas to improve the patient transfer process from intensive care to general ward.

     

    Findings – The questionnaire can be used to create an understanding of the existing culture in an organization but it needs to be analysed qualitatively. The result from the examined organizations show a common culture in the two units even though they are located in different hospitals and cities. The result further shows some differences between professions but overall, the result points at a relatively high agreement to the QM values in the organization indicating the presence of a quality culture.    

     

    Practical implications – Using a QM value survey in the healthcare context could help developing the care from a different point of view then ordinary. It could help to shift focus from individual to group and system.

  • 22.
    Kahm, Therese
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Creating a Force of Development in Swedish Healthcare: A Contribution from the First-Line Managers’ Perspective When Driving Improvement Work Based on Lean2019Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    This thesis is about the healthcare managers, working at operational levels, defined as the first-line managers. These managers often are given the role and responsibility to integrate improvements into daily work. A stronger development ability of Swedish healthcare requires first-line managers with a developed ability to lead change. Thereby efforts must be made to provide these managers with supportive work conditions when leading and developing organizations. One approach to organizational development is Lean, which refers to a strong improvement culture based upon a supportive and highly engaged leadership as well as a strong customer focus. The purpose of this thesis is to contribute to knowledge about and an understanding of the conditions that influence first-line healthcare managers’ abilities to drive improvement work based on Lean. Some of the conditions investigated are; time, receiving support from the own manager, feeling joy in improvement work and being assured about the effects of Lean.

    The thesis is based on three separate analyses of a web-based survey, which relate to the two research questions. The study was conducted in a Swedish healthcare organization two years after the initiation of Lean. The analyses are presented in three separate papers. The first research question considers; How can an instrument be developed that investigates first-line managers’ views on their role, conditions and ability to drive improvement work based on Lean? The second question is; What can be learned from using the instrument that investigates first-line managers’ views on their role, conditions and ability to drive improvement work based on Lean? A qualitative study based on a hermeneutic, inductive, qualitative research approach was conducted in order to meet the research purpose and answer the research questions.

    The thesis is mainly based on three papers. In paper 1 it is stated that the assuredness about the effects of Lean was quite high among the managers when the survey was conducted, such as that Lean contributes to a greater patient focus and to the development of an improvement culture. In paper 2 it is noted that the first-line managers view their role as crucial in improvement work based on Lean. Time, support from coworkers, and a clear vision and clear goals were the three conditions they considered to be most important for their ability. The results presented in paper 3 show that to initiate improvement work based on Lean, they ask for own managers who are assured about Lean and include them in discussions. They view their role and responsibility in relation to their coworkers as extensive, for instance increating a culture where problems and mistakes are viewed as possibilities to improve and for encouraging that new work procedures are tested. The findings indicate a need for a deeper understanding of Lean. It is concluded that a thorough understanding of Lean is a main condition for the first-line managers´ ability to drive improvement work based on the approach. Developing a common view of Lean takes time, which is important to emphasize in the practical setting to motivate for a long-term perspective. This development takes highly motivated, assured and persistent leaders with a continuous improvement attitude and a mission to improve healthcare together.

    There is also an applied research question; How can the use of the instrument contribute to developing first-line managers’ role, conditions, and ability to drive improvement work based on Lean? In its essence, Lean is concerned with improving a system and since the instrument raises questions about relationships between organizational members, it sets focus on the system and calls on a system view. The responsibility for one management level must continuously be set I relation to another, when putting the pieces together in the “improvement puzzle”. Change depends on adjustments in human behavior and the instrument establishes a focus on the people in the processes necessary for development and results. The instrument also provides opportunity and structure to investigate and talk about the soft conditions important for the ability, such as receiving support from the own manager, and feeling inspiration and being assured. The practice of Lean requires changes in attitudes, new habits, new skills in the whole system, meaning in each individual from the executive management to the front-line workers. Thereby self-reflection becomes important, which requires forums for dialogue. It is concluded that such forums can influence first-line healthcare managers’ abilities to drive improvement work based on Lean. In dialogue forums improvement work can be reflected upon and learned from together.

  • 23.
    Kahm, Therese
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Ingelsson, Pernilla
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Creating a development force in Swedish healthcare: a focus on the first-line managers’ perspective when applying Lean2019Inngår i: International Journal of Health Care Quality Assurance, ISSN 0952-6862, E-ISSN 1758-6542, Vol. 32, nr 8, s. 1132-1144Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Purpose The purpose of this paper is to present the results from a study that investigates first-line healthcare managers' views on their role and the conditions that influence their ability to drive improvement work based on Lean. Design/methodology/approach A questionnaire was sent to all first-line managers in a healthcare organization to investigate their views on their role, conditions and ability to create change according to Lean. The results from four of the questions are presented, which focus on how crucial they consider their role to be for managing improvement work based on Lean, what work tasks their time is spent on, what factors they consider to be important to their ability to drive change and what factors best describe what Lean provides. Findings The results show that first-line managers claim that their role is crucial in improvement work, but when they defined their work tasks, the time spent on improvements was not frequently described. Time, support from coworkers, and a clear vision and clear goals were the three factors that they considered to be most important to their ability to drive improvement work. Considering their leadership, Lean contributed to the structure with tools and supportive methods. Originality/value The questions can be used separately or as part of the entire questionnaire before and along a Lean process to obtain a better understanding of how to create a sustainable Lean approach in healthcare. Understanding the factors that first-line managers consider supporting their ability in improvement work and what they consider Lean provides is important in creating a development force in Swedish healthcare.

  • 24.
    Kahm, Therese
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Ingelsson, Pernilla
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    "Stuck in the middle” Healthcare first-line managers´ responsibilities and needs of support when applying LeanInngår i: Artikkel i tidsskrift (Fagfellevurdert)
  • 25.
    Katz-Demyanetz, Alexander
    et al.
    Technion R&D Fdn, Haifa, Israel.
    Popov, Vladimir V., Jr.
    Technion R&D Fdn, Haifa, Israel.
    Kovalevsky, Aleksey
    Technion R&D Fdn, Haifa, Israel.
    Safranchik, Daniel
    Technion R&D Fdn, Haifa, Israel.
    Koptioug, Andrei
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Powder-bed additive manufacturing for aerospace application: Techniques, metallic and metal/ceramic composite materials and trends2019Inngår i: MANUFACTURING REVIEW, ISSN 2265-4224, Vol. 6, artikkel-id 5Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    The current paper is devoted to classification of powder-bed additive manufacturing (PB-AM) techniques and description of specific features, advantages and limitation of different PB-AM techniques in aerospace applications. The common principle of "powder-bed" means that the used feedstock material is a powder, which forms "bed-like" platform of homogeneous layer that is fused according to cross-section of the manufactured object. After that, a new powder layer is distributed with the same thickness and the "printing" process continues. This approach is used in selective laser sintering/melting process, electron beam melting, and binder jetting printing. Additionally, relevant issues related to powder raw materials (metals, ceramics, multi-material composites, etc.) and their impact on the properties of as-manufactured components are discussed. Special attention is paid to discussion on additive manufacturing (AM) of aerospace critical parts made of Titanium alloys, Nickel-based superalloys, metal matrix composites (MMCs), ceramic matrix composites (CMCs) and high entropy alloys. Additional discussion is related to the quality control of the PB-AM materials, and to the prospects of new approaches in material development for PB-AM aiming at aerospace applications.

  • 26.
    Khrapov, D.
    et al.
    National Research Tomsk Polytechnic University, Tomsk, Russia.
    Koptioug, Andrei
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Manabaev, K.
    National Research Tomsk Polytechnic University, Tomsk, Russia.
    Léonard, F.
    Bundesanstalt für Materialforschung und -prüfung (BAM), Berlin, Germany.
    Mishurova, T.
    Bundesanstalt für Materialforschung und -prüfung (BAM), Berlin, Germany.
    Bruno, G.
    Bundesanstalt für Materialforschung und -prüfung (BAM), Berlin, Germany; University of Potsdam,, Potsdam, Germany.
    Cheneler, D.
    Lancaster University, Bailrigg, Lancaster, United Kingdom.
    Loza, K.
    University of Duisburg-Essen, Essen, Germany.
    Epple, M.
    University of Duisburg-Essen, Essen, Germany.
    Surmenev, R.
    National Research Tomsk Polytechnic University, Tomsk, Russia.
    Surmeneva, M.
    National Research Tomsk Polytechnic University, Tomsk, Russia.
    The impact of post manufacturing treatment of functionally graded Ti6Al4V scaffolds on their surface morphology and mechanical strength2019Inngår i: Journal of Materials Research and Technology, ISSN 2238-7854Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    An ultrasonic vibration post-treatment procedure was suggested for additively manufactured lattices. The aim of the present research was to investigate mechanical properties and the differences in mechanical behavior and fracture modes of Ti6Al4V scaffolds treated with traditional powder recovery system (PRS) and ultrasound vibration (USV). Scanning electron microscopy (SEM) was used to investigate the strut surface and the fracture surface morphology. X-ray computed tomography (CT) was employed to evaluate the inner structure, strut dimensions, pore size, as well as the surface morphology of additively manufactured porous scaffolds. Uniaxial compression tests were conducted to obtain elastic modulus, compressive ultimate strength and yield stress. Finite element analysis was performed for a body-centered cubic (BCC) element-based model and for CT-based reconstruction data, as well as for a two-zone scaffold model to evaluate stress distribution during elastic deformation. The scaffold with PRS post treatment displayed ductile behavior, while USV treated scaffold displayed fragile behavior. Double barrel formation of PRS treated scaffold was observed during deformation. Finite element analysis for the CT-based reconstruction revealed the strong impact of surface morphology on the stress distribution in comparison with BCC cell model because of partially molten metal particles on the surface of struts, which usually remain unstressed. 

  • 27.
    Khrapov, D.
    et al.
    National Research Tomsk Polytechnic University, Tomsk, Russia.
    Surmeneva, M.
    National Research Tomsk Polytechnic University, Tomsk, Russia.
    Koptioug, Andrei
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Evsevleev, S.
    Federal Institute for Materials Research and Testing (BAM), Berlin, Germany.
    Lé Onard, F.
    Federal Institute for Materials Research and Testing (BAM), Berlin, Germany.
    Bruno, G.
    Federal Institute for Materials Research and Testing (BAM), Berlin, Germany.
    Surmenev, R.
    National Research Tomsk Polytechnic University, Tomsk, Russia.
    X-ray computed tomography of multiple-layered scaffolds with controlled gradient cell lattice structures fabricated via additive manufacturing2019Konferansepaper (Fagfellevurdert)
    Abstract [en]

    In this paper we report on the characterization by X-ray computed tomography of calcium phosphate (CaP) and polycaprolactone (PCL) coatings on Ti-6Al-4V alloy scaffolds used as a material for medical implants. The cylindrical scaffold has greater porosity of the inner part than the external part, thus, mimicking trabecular and cortical bone, respectively. The prismatic scaffolds have uniform porosity. Surface of the scaffolds was modified with calcium phosphate (CaP) and polycaprolactone (PCL) by dip-coating to improve biocompatibility and mechanical properties. Computed tomography performed with X-ray and synchrotron radiation revealed the defects of structure and morphology of CaP and PCL coatings showing small platelet-like and spider-web-like structures, respectively. 

  • 28.
    Khrapov, D.
    et al.
    National Research Tomsk Polytechnic University, Tomsk, Russia.
    Surmeneva, M.
    National Research Tomsk Polytechnic University, Tomsk, Russia.
    Koptioug, Andrei
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Surmenev, R.
    National Research Tomsk Polytechnic University, Tomsk, Russia.
    Microstructure investigation of Ti-26Nb alloy manufactured from elemental powders by electron beam melting2019Inngår i: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, nr 1, artikkel-id 012126Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Alloys which are planned to be used for implants fabrication must possess excellent biocompatibility, high strength, and low Young's modulus. A low elastic modulus, close to that of the cortical bone could significantly reduce the stress-shielding phenomenon usually occurring after surgery. Beta-titanium alloys such as Ti-Nb are good candidates for this purpose. Nb is known as a biocompatible metal used for titanium β-phase stabilization. Previous investigations indicate that the increase of Nb content results in the increase of β phase amount but the decrease of β grain size. In this study, we were aiming at the investigation of the microstructural properties of a titanium alloy manufactured by electron beam melting from the elemental powders mixture of Ti and Nb with 26 at.% of Nb. The influence of operating parameters on the efficacy of dissolving Nb particles in Ti was studied. The results obtained by SEM analysis demonstrated that electron beam energy has a significant effect on the homogeneity of the manufactured specimens. To obtain homogeneous and porosity-free specimens high energy level is required. The microstructure of these specimens was characterized. © Published under licence by IOP Publishing Ltd.

  • 29.
    Koptioug, Andrei
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Popov, Vladimir V., Jr.
    Israel Institute of Metals, Haifa, Israel.
    Botero Vega, Carlos Alberto
    Jiménez-Piqué, Emilio
    Universitat Politècnica de Catalunya, Barcelona, Spain.
    Katz-Demyanetz, Alexander
    Israel Institute of Metals, Haifa, Israel.
    Rännar, Lars-Erik
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Bäckström, Mikael
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Compositionally-tailored steel-based materials manufactured by electron beam melting using blended pre-alloyed powders2020Inngår i: Materials Science & Engineering: A, ISSN 0921-5093, E-ISSN 1873-4936, Vol. 771, artikkel-id 138587Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The paper presents the prospects of additive manufacturing (AM) in metal, using the powder bed fusion (PBF) method Electron Beam Melting (EBM) in fabrication specific steel-based alloys for different applications. The proposed approach includes manufacturing of metals from blended pre-alloyed powders for achieving in situ alloying and the material microstructure tailoring by controlling electron beam energy deposition rate EBM tests were conducted with the blends of 316L stainless steel and Colferoloys 103 and 139, corrosion- and abrasion-resistant iron based materials commonly used for plasma spray coating. Thorough microstructure analysis of the manufactured sample was carried out using electron microscopy and measurements of microhardness and elastic modulus was carried out using nanoindentation. It is concluded that implementation of blended powder pathway in PBF AM allows to widen the scope of available materials through diminishing the dependence on the availability of pre-alloyed powders. Together with beam energy steering this pathway also allows for an effective sample microstructure control at different dimensional scales, resulting in components with unique properties. Therefore, the implementation of ‘blended powder pathway’ in PBF AM provides a possibility of manufacturing components with the composite-like and homogeneous zones allowing for the microstructure control and effectively adding a “4th dimension” to “3D printing". 

  • 30.
    Koptyug, Andrey
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Botero, Carlos
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Sjöström, William
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Jimenez-Pique, E
    Şelte, A
    Asvik, Kenneth
    Uddeholm.
    Rännar, Lars-Erik
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Bäckström, Mikael
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Steel-based functionally gradient materials obtained via Electron Beam Melting2019Inngår i: Proc. Alloys for Additive Manufacturing Symposium AAMS2019, 2019Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Recent developments in metal Additive Manufacturing (AM) technologies have introduced great capabilities unparalleled by conventional manufacturing, not only in achieving freeform geometries, but also in opening new possibilities to tailor the microstructure/properties of materials by controlling process parameters. Electron Beam Melting (EBM) is one of the most important members of the Powder Bed Fusion(PBF) family; it uses a focused electron beam to melt metal powder in a layer by layer approach. One of the main challenges that EBM faces nowadays is the lack of commercially available materials (most of them are Ti-based or Ni-based alloys). Therefore, there is a strong interest to further develop the process for new materials, including steel-based ones. In this investigation two steel-based powders; stainless steel 316L and a tool steel developed by Uddeholm, were used to manufacture functionally graded materials. A special hardware setup using a single powder dispenser was installed in the EBM system, where powders were placed separately to manufacture 10x10x10 mm cubes. SEM images of the specimens’ polished cross sections show a gradual microstructural transition from characteristic 316L one on the bottom of the specimens to the tool steel towards the top. Nanoindentation experiments confirmed a consequent gradient in hardness and elastic modulus, which gradually increase towards top surface. These results show great possibilities to tailor microstructure and mechanical properties by combining different powders in the EBM technology. Potential applications include the tooling industry, where hard and wear-resistant materials are demanded on the surface whether tougher and more ductile behavior is desirable on the core of the tool.

  • 31.
    Laptev, Roman
    et al.
    Tomsk Polytechnic University.
    Pushilina, Natalia
    Tomsk Polytechnic University.
    Kashkarov, Egor
    Tomsk Polytechnic University.
    Syrtanov, Maxim
    Tomsk Polytechnic University.
    Stepanova, Ekaterina
    Tomsk Polytechnic University.
    Koptyug, Andrey
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik. Tomsk Polytechnic University.
    Lider, Andrey
    Tomsk Polytechnic University.
    Influence of beam current on microstructure of electron beam melted Ti-6Al-4V alloy2019Inngår i: Progress in Natural Science, ISSN 1002-0071, E-ISSN 1745-5391, Vol. 29, nr 4, s. 440-446Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The defect microstructure of the samples manufactured from Ti-6Al-4V powder was studied using electron beam melting (EBM) in the beam current range of 17 - 13 mA. The hybrid digital complex combined positron lifetime spectroscopy and coincidence Doppler broadening spectroscopy was used to characterize the defect structure of the materials. The microstructure and defects were also analyzed by transmission electron microscopy. It has been established that the main type of the defects in the EBM manufactured samples is dislocations. According to the conducted measurements and calculations, the dislocation density in the EBM manufactured samples exceeds by two orders the similar value for the cast Ti-6Al-4Valloy. Formation of Ti-Ti-Al nanoscale clusters has been found in the EBM manufactured samples.

  • 32.
    Lilja, Johan
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Hansen, David
    Aalborg University Copenhagen.
    Richardsson, Daniel
    Styrkebaserad.org.
    Accelerating sustainable society and a flourishing Scandinavia through a living and communicating network of AI-summits2019Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The need for a radical transformation of society, business and way of life towards sustainability is by now widely accepted and acknowledged in the Mid Scandinavian region. This transformation also occurs as a major objective in the UN Sustainable Development Goals, both nationally and locally. However, after creating awareness, moving from knowing to doing is now the real challenge. Pushing for sustainability in strategies and visions, or even providing extensive funding for projects related to sustainable development is not doing the job fast enough. One obvious reason being that the more sustainable ideas and solutions of the future do require new levels of systems thinking and solutions on the level of the “whole system”. That in turn is dependent on connections and relations across traditional silos and organizational borders that currently does not exist. Therefore, stakeholders from Sweden and Norway are currently experimenting together on using a living and communicating network of Appreciative Inquiry Summits to accelerate sustainable, circular, and flourishing development in Scandinavia. The initiative is designed as an innovation project with hands-on exploring, prototyping, as well as researching how to accelerate the desired transformation. The project, called SMICE, is inspired by the “whole system in the room” approach of the amazing initiative “Sustainable Cleveland 2019”. However, as the context of this initiative is a large sparsely populated region, including also several countries, the set up now evolving is moving beyond just one annual big AI-summit towards more of a distributed system, “ecosystem”, or network of AI-summits and other resources that live, communicate and relate to each other continuously. During this presentation we will share our progress made, results, learnings, challenges, insights, and practices from our exciting and important journey so far.

  • 33.
    Lilja, Johan
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Hansen, David
    Aalborg University Copenhagen.
    Richardsson, Daniel
    Styrkebaserad.org.
    The Best After Summit Drumming Ever: Sharing and co-creating on how to keep the generative connections alive and get progress after AI-Summits -“Drumming, dancing and doing”2019Konferansepaper (Fagfellevurdert)
  • 34.
    Lilja, Johan
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Hansen, David
    Aalborg University.
    Richardsson, Daniel
    Styrkebaserad.org.
    Svedin, Ingela
    Sida (Swedish International Development Cooperation Agency).
    How Quality Management Needs Emergence for Engaging Agenda 2030: As “improving” increasingly means getting a complex system to take transformative steps towards sustainability and flourishing2019Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Purpose

    If not now, when? The UN Sustainable Development Goals (SDGs) are getting increasing attention, and there is an acknowledgement that the challenges ahead, as well as the solutions needed, often are complex. In contrast, the historical strengths of Quality Management (QM) have been in situations when cause-effect relations can be analyzed and understood, when technical expertise can provide the answer, where the application of “best practice” is helpful, where order is a virtue. When dealing with complexity, leaders who are tempted to impose this kind of command-and-control style will often fail. Success rather comes from setting the stage, stepping back a bit, allowing patterns to emerge, curiously tracking what takes place, spreading what is being learned, and scaling up success. Such a leadership and practice has been referred to as the fourth and called for “Emergence Paradigm” of QM. The purpose of this paper is to contribute with knowledge concerning how the Emergence Paradigm of QM comes into play when getting organizations and the world to take action on Agenda 2030.

    Methodology/Approach

    The paper is based on dialogic action research and presents the case and emergent process of 60 Swedish authorities getting to collective action on Agenda 2030.

    Findings

    The paper highlights how QM may contribute to realizing the Agenda 2030 by dynamically combining the strengths of the past paradigms with new practices and mind-sets related to complexity and emergence.

    Value of the paper

    The paper provides new insights that may help to take the bold and transformative steps urgently needed to shift the world onto a sustainable and resilient path.

  • 35.
    Lindell, Sabina
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Eldsand, Marlene
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Värdeskapande intern kommunikation med Lean kommunikation och kommunikativt ledarskap: Modell för Lean kommunikation för att stärka och medvetet arbeta med värdeskapande intern kommunikation i Leanbaserade verksamheter,2019Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Syftet med    studien var att undersöka hur Leanbaserade/Leaninspirerade verksamheter i    svensk offentlig sektor arbetar för att åstadkomma värdeskapande intern    kommunikation. Utgångspunkten var att dagens demografiska utveckling    parallellt med effektiviseringskrav innebär utmaningar för kommuner att    säkra välfärd och kundnöjdhet samt att detta arbete behöver börja internt    gentemot medarbetarna för att ge effekt utåt till kunderna. Lean    kommunikation och kommunikativt ledarskap har seglat upp som två relativt    nya begrepp som ännu inte utforskats så mycket, men som tar sikte på just    värdeskapande kommunikation. Denna studie fokuserade på dessa begrepp på    teoretisk nivå och utforskade hur de kan användas praktiskt och strategiskt    för att stärka värdeskapande intern kommunikation. Empirin utgjordes av    semistrukturerade intervjuer med 15 chefer/ledare från sex kommuner, som    analyserades med hjälp av kvalitativ innehållsanalys. Slutsatsen var att det    fanns ganska stor överensstämmelse mellan respondenterna om vad som ansågs    vara framgångsfaktorer, vad som utmärker en bra kommunikativ ledare samt hur    de arbetade med intern kommunikation i det dagliga arbetet. Tydlighet och    visualisering var de mest frekventa aspekter som lyftes. Likaså var    kopplingen till Lean kommunikation och kommunikativt ledarskap påtaglig –    även om inte samtliga intervjuade kände till eller använde begreppen    arbetade de utifrån dem undermedvetet. Däremot var det få som hade    fungerande strategier för att göra cheferna/ledarna mer kommunikativa och    flera lyfte brister kopplade till uppföljning, utvärdering och feedback.    Utifrån studiens resultat togs en modell för Lean kommunikation fram, med    tillhörande checklista, som kan användas av Lean verksamheter för att stärka    och medvetet arbeta med värdeskapande intern kommunikation.

  • 36.
    Lintzén, Nina
    et al.
    Luleå Univ. of Technology, Luleå.
    Danvind, Jonas
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Melin Söderström, Erik
    Peak Innovation, Östersund.
    Nilsson, Kajsa
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Skoglund, Per
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Laboratory Investigation of Different Insulating Materials Used for Snow Storage2019Inngår i: Journal of cold regions engineering, ISSN 0887-381X, E-ISSN 1943-5495, Vol. 33, nr 4, artikkel-id 04019012Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Storage of snow has become of increasing interest for the winter business industry. Covering a pile of snow with an insulating material protects the snow from heat transfer from the surroundings and reduces the melting. Storing snow enables ski resorts to set an opening date, and it can also be used to secure winter sports events that are dependent on snow. Cover materials that are commonly used as insulation are wood-based materials, such as sawdust, and textile materials and sheets. How efficiently a cover material functions as thermal insulation depends on the material characteristics and thickness of the insulating layer. In this study, results from a laboratory experiment are presented, which aimed at comparing different commonly used cover materials, as well as some other materials that have not previously been used as thermal insulation on snow. Different layer thicknesses were also investigated. The results show that the insulating capacity of sawdust is reduced with time. Despite degrading insulating properties with time, sawdust is still considered one of the best materials to use as insulation on snow, and it is also more efficient than the textile materials investigated in this study. Doubling the textile layers or adding a three-dimensional (3D) spacer textile, which implies adding a layer of air between the textile and the snow, reduces the snow melting. Water absorption, water transport, and evaporation of water affect the melting. In this work, evaporative cooling did not prove to reduce melting; therefore, it was not evident whether a textile material should be permeable. An interesting material used in the study was Quartzene, which absorbed all the melt water and protected the snow most efficiently of the materials tested. 

  • 37.
    Lund Ohlsson, Marie
    et al.
    Mittuniversitetet, Fakulteten för humanvetenskap, Institutionen för hälsovetenskap.
    Danvind, Jonas
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Holmberg, L Joakim
    Linköping University.
    Estimation of muscle work in cross-country sit-skiing2019Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Introduction: In Nordic skiing all sitting athletes compete in the same event competition. The sitting positions differ between athletes. Most of the athletes sit knee-seated, or with their thighs tilted downward (KL) and free to move their trunk. Some athletes do not have the possibility to sit in that position and therefore adjust their sitting position. For example, athletes with reduced muscle control in hips and lower trunk sit with their knees higher than their hips (KH) to increase stability.

    Purpose: The purpose of this study was to examine how sitting position KL and KH affects the muscular power.

    Methods: One female able-bodied athlete performed one test session in each sitting position (KL and KH) comprising five times 3 minutes sub-maximal exercise and a maximal time-trial in a double-poling ergometer (ThoraxTrainer A/S, Denmark). During the tests 3D kinematics (Qualisys AB, Sweden), pole forces and power output were measured. From the measured data, participant and test specific musculo-skeletal inverse-dynamics simulation models were created using the AnyBody Modelling system (AMS 6.0, Anybody Technology A/S, Denmark). From the simulations of submaximal exercise power output 37 W, 52 W and maximal time-trial the muscular metabolic power (mMP) was computed according to Holmberg (2013).

    Results: The power output in maximal exercise was higher in KL (90.1 W) compared to KH (74.7 W). During both submaximal and maximal exercise, the total muscular metabolic power was larger in KL compared to KH (KL mean 861 W and KH mean 682 W). The muscular metabolic power also showed larger relative involvement of legs in KL (KL mean 18 % and KH mean 4 %) and larger relative involvement of arms and trunk in KH.

    Conclusion: That sitting position KL compared to KH is related to higher performance for athletes without impairment in hips and trunk is known before (Gastaldi, 2012). However, the results from this study explains why performance is higher in KL, i.e. that larger muscular metabolic power are produced in the legs. This study also shows the size of the involvement of legs, which could be interesting for development of classification rules.

  • 38.
    Lööf-Mahler, Cecilia
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Skolans om lärande organisation: En studie   av PRIO och dess effekter i ett hållbart utvecklingsarbete2019Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Syftet med denna studie var att utveckla mer kunskap kring skolan som lärande organisation. Detta gjordes genom en kvalitativ fallstudie där förbättringsprogrammet PRIO och dess effekter på utvecklingsarbetet i Landskrona stads skolor studerades. Aspekterna implementering, uppföljning, avtryck av förändringsarbetet i organisationen idag, kvalitetsökning för eleverna samt koppling mellan skolornas utvecklingsområden och forskningsfältet lärande organisationer i stort undersöktes. Slutsatserna blev att implementeringen fungerat bra i initialskedet men att utvecklingsarbetet kopplat till PRIO på drygt hälften av skolorna sedan stannat av. Detta kan delvis kopplas till stor personalomsättning bland rektorerna, men också till att PRIO-arbetet i många fall inte varit en del av skolornas systematiska kvalitetsarbete. Man upplever en kvalitetsökning för eleverna men kopplingen till PRIO är inte helt självklar. Drygt hälften av de utvecklingsområden som skolorna arbetat med korrelerar med de områden som lyfts fram som väsentliga inom forskningsfältet kring lärande organisationer. Skolorna utvecklade en lärande organisation genom PRIO-arbetet men det är inte alla skolor som kunnat bibehålla den över tid.

  • 39.
    Mårtensson, Anna
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Ingelsson, Pernilla
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Bäckström, Ingela
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Co-creation - making it happen2019Inngår i: 22nd QMOD conference: ON QUALITY AND SERVICE SCIENCES ICQSS 2019, 13-15 OCTOBER / [ed] Su Mi Dahlgaard-Park & Jens J. Dahlgaard, 2019Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Organisations continuously meet different challenges, often ones that are both difficult and complex. Identified challenges include, for instance, costumers becoming more changeable and volatile as well as organisations needing to become more sustainable in several dimensions and to having a structured and systematic method for working with quality. Municipalities are not excluded from these challenges and need to face the challenge of demands from citizens as well as be efficient and effective at the same time.New ways of working and doing things need to be developed and adapted to meet and fulfil organisational challenges. Co-creation, which is a collaborative process to identify and shape the desired goals, can be a method that allows organisations to establish new ways of working and creating supportive methods. In addition, a collaborative process facilitates the adoption of new ways of working since it is easier to do that through actions rather than thinking oneself into a new way of acting.

    Purpose: The purpose is to describe the process of co-creating a dialogue model that aim to increase citizen value in a municipality organisation. The purpose is also to present the results from the development process and evaluate the chosen model.

    Methodology/Approach: A dialogue model was developed through a co-creation process conducted through a series of workshops, discussions and interactive tasks. The whole process was carried out in three steps. In the first step, success factors for a constructive dialogue emanating from citizen value were identified. In the second step, several dialogue models were developed, tested and evaluated, and one model was chosen. In the third step, the chosen model was evaluated.

    Findings: Evaluating the real-life use of the model supports the statement that the process has delivered a model that enables the requested prerequisites for constructive dialogues such as, for example, the opportunity for preparation, structured and transparent documentation and enabling a holistic view in the dialogue model. Co-creation that has involved co-workers have contributed to develop the dialogue model to be adapted to their own context.

    Value of the paper: Using a co-creative process when developing and realising a dialogue model enhances the possibilities for an organisational adaption to its own context.

    Type of paper: Case study

  • 40.
    Mårtensson, Anna
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Snyder, Kristen
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Ingelsson, Pernilla
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Interlinking Lean and Sustainability: How ready are leaders?2019Inngår i: The TQM Journal, ISSN 1754-2731, E-ISSN 1754-274X, Vol. 31, nr 2, s. 136-149Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Purpose: The purpose of this paper is to explore evidence of interlinkages between Lean and sustainability among organisational leaders in the early stages of Lean implementation.

    Design/methodology: A multiple-site case study was conducted to study the connections between Lean and sustainable development during the implementation stages of a Lean practice. In-depth interviews were conducted with managers about their knowledge and understanding of the interlinkages between Lean and sustainable development. The findings were then used as an analytic frame to determine whether these interlinkages were present in the organisation.

    Findings: Evidence of interlinkages between Lean and sustainable development was found; however, their presence was incomplete and inconsistent across clinics.

    Research implications: Insights from the research can help organisations plan for the implementation of Lean practice, particularly when a sub-goal is to achieve sustainable development.

    Originality/value: The study shows the importance of focusing on managers’ knowledge and understanding of the interlinkages between Lean and sustainable development when implementing Lean in order to utilise Leans full potential to achieve sustainability.

  • 41.
    Norris, Karl
    et al.
    Univ Lancaster, Lancaster, England.
    Mishukova, Oksana I.
    Natl Res Tomsk Polytech Univ, Tomsk, Russia.
    Zykwinska, Agata
    IFREMER, Nantes, France.
    Colliec-Jouault, Sylvia
    IFREMER, Nantes, France.
    Sinquin, Corinne
    IFREMER, Nantes, France.
    Koptioug, Andrei
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Cuenot, Stephane
    Univ Nantes, Nantes, France.
    Kerns, Jemma G.
    Univ Lancaster, Lancaster, England.
    Surmeneva, Maria A.
    Natl Res Tomsk Polytech Univ, Tomsk, Russia.
    Surmenev, Roman A.
    Natl Res Tomsk Polytech Univ, Tomsk, Russia.
    Douglas, Timothy E. L.
    Univ Lancaster, Lancaster, England; Univ Lancaster, Lancaster, England.
    Marine Polysaccharide-Collagen Coatings on Ti6Al4V Alloy Formed by Self-Assembly2019Inngår i: Micromachines, ISSN 2072-666X, E-ISSN 2072-666X, Vol. 10, nr 1, artikkel-id 68Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Polysaccharides of marine origin are gaining interest as biomaterial components. Bacteria derived from deep-sea hydrothermal vents can produce sulfated exopolysaccharides (EPS), which can influence cell behavior. The use of such polysaccharides as components of organic, collagen fibril-based coatings on biomaterial surfaces remains unexplored. In this study, collagen fibril coatings enriched with HE800 and GY785 EPS derivatives were deposited on titanium alloy (Ti6Al4V) scaffolds produced by rapid prototyping and subjected to physicochemical and cell biological characterization. Coatings were formed by a self-assembly process whereby polysaccharides were added to acidic collagen molecule solution, followed by neutralization to induced self-assembly of collagen fibrils. Fibril formation resulted in collagen hydrogel formation. Hydrogels formed directly on Ti6Al4V surfaces, and fibrils adsorbed onto the surface. Scanning electron microscopy (SEM) analysis of collagen fibril coatings revealed association of polysaccharides with fibrils. Cell biological characterization revealed good cell adhesion and growth on bare Ti6Al4V surfaces, as well as coatings of collagen fibrils only and collagen fibrils enhanced with HE800 and GY785 EPS derivatives. Hence, the use of both EPS derivatives as coating components is feasible. Further work should focus on cell differentiation.

  • 42.
    Palm, Klas
    et al.
    Uppsala University,.
    Lilja, Johan
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Innovation Lab 2030: Finding out how to Move Towards the Agenda 2030 Together in a Complex Alliance of Swedish Authorities2019Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This article describes cooperation between authorities and universities in order toincrease innovation capacity and thereby achieve change in performance and executionfor better contribution to a sustainable future. Through action research, the authors havedeveloped new knowledge about results, success factors and obstacles for increasinginnovation capacity. The paper recognizes that administrative and adaptive leadershipmust work together effectively if organizations are to function properly. There is a needfor a dynamic relationship between the formal and the informal in organizations– between top-down administrative forces and complex adaptive emergent forces. Thereis a need for a wider range and simultaneous use of management models adapted todifferent contexts and needs.

  • 43.
    Persson, Mikael
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Airborne contamination and surgical site infection: Could a thirty-year-old idea help solve the problem?2019Inngår i: Medical Hypotheses, ISSN 0306-9877, E-ISSN 1532-2777, Vol. 132, artikkel-id 109351Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Surgical site infection (SSI) is a most serious postoperative complication, associated with increased morbidity and mortality, as well as extended therapy and elevated healthcare costs. In open clean surgery, e.g. orthopedic and cardiothoracic operations, the risk of SSI is strongly correlated with the amount of airborne bacteria being present in the operating room and the surgical field. The source of these bacteria is the surgical team itself, as we all emit thousands of bacteria-carrying skin particles every minute into the air. Although the risk of airborne contamination has decreased over the years, thanks to modern surgical clothing and advanced operating room ventilation, airborne bacteria are still detected and cause SSI. However, during the past thirty years there has been a simple and potentially effective preventive method waiting to be noticed. In 1986 Hall, Mackintosh and Hoffman found in a controlled experimental study that the application of regular unperfumed skin lotion to a person's body reduced the emission of airborne bacteria-carrying particles by approximately 90%. Moreover, the effect lasted at least 4 hours, which corresponds to a major surgical procedure. Thus, in the light of those results the present paper puts forth the hypothesis that this method can decrease the incidence of airborne bacterial contamination and SSI in open clean surgery. The paper also discusses the rationale and advantages of the method, and questions why it has escaped scientific attention for so long. In healthcare, difficult problems rarely have a simple and cheap solution. However, the use of ordinary skin lotion in open surgery may just be one, as it could potentially help prevent surgical site infection, and thereby increase patient safety and reduce healthcare costs. 

  • 44.
    Petrone, Nicola
    et al.
    University of Padova, Italy.
    Candiotto, Gianluca
    University of Padova, Italy.
    Marzella, Edoardo
    University of Padova, Italy.
    Uriati, Federico
    University of Padova, Italy.
    Carraro, Giovanni
    University of Padova, Italy.
    Bäckström, Mikael
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Koptyug, Andrey
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Feasibility of using a novel instrumented human head surrogate to measure helmet, head and brain kinematics and intracranial pressure during multidirectional impact tests2019Inngår i: Journal of Science and Medicine in Sport, ISSN 1440-2440, E-ISSN 1878-1861, Vol. 22, nr S1, s. S78-S84Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Objectives: Aim of the work is to present the feasibility of using an Instrumented Human Head Surrogate (IHHS-1) during multidirectional impacts while wearing a modern ski helmet. The IHHS-1 is intended to provide reliable and repeatable data for the experimental validation of FE models and for the experimental evaluation of modern helmets designed to enhance the degree of protection against multidirectional impacts. Design: The new IHHS-1 includes 9 triaxial MEMS accelerometers embedded in a silicone rubber brain, independently molded and presenting lobes separation and cerebellum, placed into an ABS skull filled with surrogate cerebrospinal fluid. A triaxial MEMS gyroscope is placed at the brain center of mass. Intracranial pressure can be detected by eight pressure sensors applied to the skull internal surface along a transversal plane located at the brain center of mass and two at the apex. Additional MEMS sensors positioned over the skull and the helmet allow comparison between outer and inner structure kinematics and surrogate CSF pressure behavior. Methods: The IHHS-1 was mounted through a Hybrid III neck on a force platform and impacted with a striker connected to a pendulum tower, with the impact energies reaching 24J. Impact locations were aligned with the brain center of mass and located in the back (sagittal axis), right (90° from sagittal axis), back/right (45°), and front right (135°) locations. Following dynamic data were collected: values of the linear accelerations and angular velocities of the brain, skull and helmet; intracranial pressures inside the skull. Results: Despite the relatively low intensity of impacts (HIC at skull max value 46), the skull rotational actions reached BrIC values of 0.33 and angular accelerations of 5216 rad/s2, whereas brain angular acceleration resulted between 1,44 and 2,1 times lower with similar values of BrIC. Conclusions: The IHHS-1 is a physical head surrogate that can produce repeatable data for the interpretation of inner structures behavior during multidirectional impacts with or without helmets of different characteristics. 

  • 45.
    Popov, Vladimir V., Jr.
    et al.
    Technion R&D Fdn, Haifa, Israel.
    Muller-Kamskii, Gary
    Technion R&D Fdn, Haifa, Israel.
    Katz-Demyanetz, Alexander
    Technion R&D Fdn, Haifa, Israel.
    Kovalevsky, Aleksey
    Technion R&D Fdn, Haifa, Israel.
    Usov, Stas
    Vet Clin Orthovet, St Petersburg, Russia.
    Trofimcow, Dmitrii
    Vet Clin Beliy Klyk, Moscow, Russia.
    Dzhenzhera, Georgy
    Polygon Med Engn, Moscow, Russia.
    Koptioug, Andrei
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Additive manufacturing to veterinary practice: recovery of bony defects after the osteosarcoma resection in canines2019Inngår i: BIOMEDICAL ENGINEERING LETTERS, ISSN 2093-9868, Vol. 9, nr 1, s. 97-108Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    The paper outlines the achievements and challenges in the additive manufacturing (AM) application to veterinary practice. The state-of-the-art in AM application to the veterinary surgery is presented, with the focus of AM for patient-specific implants manufacturing. It also provides critical discussion on some of the potential issues design and technology should overcome for wider and more effective implementation of additively manufactured parts in veterinary practices. Most of the discussions in present paper are related to the metallic implants, manufactured in this case using so-called powder bed additive manufacturing (PB-AM) in titanium alloy Ti-6AL-4V, and to the corresponding process of their design, manufacturing and implementation in veterinary surgery. Procedures of the implant design and individualization for veterinary surgery are illustrated basing on the four performed surgery cases with dog patients. Results of the replacement surgery in dogs indicate that individualized additively manufactured metallic implants significantly increase chances for successful recovery process, and AM techniques present a viable alternative to amputation in a large number of veterinary cases. The same time overcoming challenges of implant individualization in veterinary practice significantly contributes to the knowledge directly relevant to the modern medical practice. An experience from veterinary cases where organ-preserving surgery with 3D-printed patient-specific implants is performed provides a unique opportunity for future development of better human implants.

  • 46.
    Popov, Vladimir V.
    et al.
    Israel Institute of Metals, Haifa, Israel.
    Katz-Demyanetz, Alexander
    Israel Institute of Metals, Haifa, Israel.
    Koptioug, Andrei
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Bamberger, Menachem
    Israel Institute of Technology, Haifa, Israel.
    Selective electron beam melting of Al0.5CrMoNbTa0.5 high entropy alloys using elemental powder blend2019Inngår i: Heliyon, ISSN 2405-8440, Vol. 5, nr 2, artikkel-id e01188Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    High Entropy Alloys (HEAs) is a novel promising class of multi-component materials which may demonstrate superior mechanical properties useful for high-temperature applications. Despite the high potential of HEAs, their production is complicated, using pre-alloyed powders in powder metallurgy route. This significantly complicates development and implementation of refractory BCC solid solution based HEAs. The present paper reports on experiments aiming at production of Al0.5CrMoNbTa0.5 multi-principle alloy using powder bed beam based additive manufacturing. Samples were manufactured using Selective Electron Beam Melting (SEBM) additive manufacturing technique from a blend of elemental powders aiming at achieving microstructure with high configurational entropy. Though it was not possible to achieve completely homogeneous microstructure, the as-printed material was composed of the zones with two multi-component solid solutions, which differed only by Al content confirming in situ alloying. The process parameters optimization was not carried out and the as-print material contained a notable amount of residual porosity. It was possible to reach lower porosity level using heat treatment at 1300 °C for 24 hours, however undesirable alloy composition changes took place. The main conclusion is that the production of the Al0.5CrMoNbTa0.5 multi-principle alloy from elemental powder blends using SEBM technique is achievable, but the process parameter optimization rather than post-process heat treatment should be performed to reduce the porosity of samples. 

  • 47.
    Radulov, I. A.
    et al.
    Technische Universit at Darmstadt, Darmstadt, Germany.
    Popov, V.V., Jr.
    Israel Institute of Metals, Technion R&D Foundation, Technion City, Haifa, Israel.
    Koptioug, Andrei
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Maccari, F.
    Technische Universit at Darmstadt, Darmstadt, Germany.
    Kovalevsky, A.
    Israel Institute of Metals, Technion R&D Foundation, Technion City, Haifa, Israel.
    Essel, S.
    Israel Institute of Metals, Technion R&D Foundation, Technion City, Haifa, Israel.
    Gassmann, J.
    Fraunhofer Research Institution for Materials Recycling and Resource Strategies IWKS, Hanau, Germany.
    Skokov, K. P.
    Technische Universit at Darmstadt, Darmstadt, Germany.
    Bamberger, M.
    Technion Israel Institute of Technology, Technion City, Haifa, Israel.
    Production of net-shape Mn-Al permanent magnets by electron beam melting2019Inngår i: Additive Manufacturing, ISSN 2214-8604, Vol. 30, artikkel-id 100787Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The main goal of this work is the adoption of additive manufacturing for the production of inexpensive rare-earth free MnAl-based permanent magnets. The use of more advanced binder-free additive manufacturing technique such as Electron Beam Melting (EBM) allows obtaining fully-dense magnetic materials with advanced topology and complex shapes. We focus on the feasibility of controlling the phase formation in additively manufactured Mn-Al alloys by employing post-manufacturing heat treatment. The as-manufactured EBM samples contain 8% of the desired ferromagnetic τ-MnAl phase. After the optimized annealing treatment, the content of the τ-phase was increased to 90%. This sample has a coercivity value of 0.15 T, which is also the maximum achieved in conventionally produced binary MnAl magnets. Moreover, the EBM samples are fully dense and have the same density as the samples produced by conventional melting density. 

  • 48.
    Ritari, Annette
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Franzén, Camilla
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    ”Vispelar alltid på varandras bästa fot”: En studieom Appreciative Leadership och de fem kärnstrategiernas praktik2019Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Attutforska och definiera vilka faktorer som bygger upp en långsiktigt hållbarverksamhet med välmående och flexibla medarbetare är viktigt i ett samhälle medkrav på snabba förändringar. Appreciative leadership är en ledarskapsfilosofivars praktik i teorin kommer ur de fem kärnstrategier (5 I) och vars förväntadeeffekter starkt korrelerar med det som i litteraturen be-skrivs somfriskfaktorer i arbetslivet. Syftet med arbetet är att bidra med kunskap kringhur de fem kärnstrategierna kan omsättas i praktik och utforska om utövandetger effekter på den psykosociala arbetsmiljön. I studien användes mixed methodsoch resultatet har sin grund en kvantitativ enkät som följdes upp medkvalitativa djupintervjuer samt fokusgrupp. Till grund för resultatet låg ocksåövergripande observationer samt dokumentanalys. Resultatet visar att samtligafem kärnstrategier i hög grad finns närvarande i verksamheten och att samtligamed-arbetare skattade och beskrev sin psykosociala arbetsmiljö som utmärkt. Detkunde också konstateras att utövande av de fem kärnstrategierna i verksamhetentill stor del sker genom ett antal väl valda arbetssätt och metoder, blandannat en stark hjälpande kultur, inre ledarskap och klar kommunikation. Iresultatet går även att utläsa att det finns utmaningar med arbets-sättet ochatt det finns några grundläggande förutsättningar som beskrivs viktiga för attarbets-sättet som helhet ska fungera, däribland hög grundbemanning och starkgemensam värde-grund. Utifrån att kärnstrategiernas praktiska utövande isamtliga steg i studien beskrivs bidra till arbetslivets friskfaktorer ärslutsatsen att det är högst troligt att ett medvetet och praktiskt utövande av5 I kan bidra till en hälsosam arbetsplats, öka arbetsglädjen och iförlängningen minska risken för arbetsrelaterad ohälsa.

  • 49.
    Roos, Stefan
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Process Development for Electron Beam Melting of 316LN Stainless Steel2019Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Additive manufacturing (AM) is a technology that inverts the procedure of traditional machining. Instead of starting with a billet of material and removing unwanted parts, the AM manufacturing process starts with an empty workspace and proceeds to fill this workspace with material where it is desired, often in a layer-by-layer fashion. Materials available for AM processing include polymers, concrete, metals, ceramics, paper, photopolymers, and resins. This thesis is concerned with electron beam melting (EBM), which is a powder bed fusion technology that uses an electron beam to selectively melt a feedstock of fine powder to form geometries based on a computer-aided design file input. There are significant differences between EBM and conventional machining. Apart from the process differences, the ability to manufacture extremely complex parts almost as easily as a square block of material gives engineers the freedom to disregard complexity as a cost-driving factor. The engineering benefits of AM also include manufacturing geometries which were previously almost impossible, such as curved internal channels and complex lattice structures. Lattices are lightweight structures comprising a network of thin beams built up by multiplication of a three-dimensional template cell, or unit cell. By altering the dimensions and type of the unit cell, one can tailor the properties of the lattice to give it the desired behavior. Lattices can be made stiff or elastic, brittle or ductile, and even anisotropic, with different properties in different directions. This thesis focuses on alleviating one of the problems with EBM and AM, namely the relatively few materials available for processing. The method is to take a closer look at the widely used stainless steel 316LN, and investigate the possibility of processing 316LN powder via the EBM process into both lattices and solid material. The results show that 316LN is suitable for EBM processing, and a processing window is presented. The results also show that some additional work is needed to optimize the process parameters for increased tensile strength if the EBM-processed material is to match the yield strength of additively laser-processed 316L material.

  • 50.
    Roos, Stefan
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för kvalitets- och maskinteknik.
    Process window for electron beam melting of 316LN stainless steelManuskript (preprint) (Annet vitenskapelig)
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