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  • Lindberg, Oscar
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    Akademisk motivation: Skillnader mellan män och kvinnor i akademisk motivation2020Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Studien syftade till att undersöka om det fanns någon skillnad i akademisk motivation mellan män och kvinnor. En enkätundersökning gjordes vid Luleå Tekniska Universitet i form av det validerade mätinstrumentet akademiska motivationsskalan (AMS). Med hjälp av mätinstrumentet gick det att identifiera sju olika dimensionerna av akademisk motivation för respektive kön. Beräkningarna mättes och förklarades sedan med hjälp av SPSS. Av de 61 respondenter visade resultatet att den akademiska motivationen inte skiljde sig signifikant mellan män och kvinnor men att det fanns tendenser i resultatet som visade på skillnader mellan män och kvinnor i medelvärdet för de olika dimensionerna i akademisk motivation. Det visade sig att det skiljde sig mellan män och kvinnor i vilken typ av motivation som påverkade den totala motivationen.

  • Karlsson, Elias
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering.
    Arvidsjaur kommun intranät: Utveckling av prototyp2020Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
    Abstract [sv]

    Ett Intranät är en hemsida som kan effektivisera kommunikation och informationsdelningpå arbetsplatsen. Arvidsjaurs kommun saknar i nuläget det och därför har en prototyp förett intranät tagits fram.

    Hemsidan har gjorts i WordPress på en virtuell maskin med operativsystemet Ubuntu.Innan WordPress hämtades installerades och konfigurerades Apache2, MySQL ochPHP. Hemsidan har byggts med hjälp av ett antal plugins, ett tema samt CSS kodning.

    Plugins tillför även funktioner som integration av Active Directory, behörigheter ochsäkerhet.I prototypen är det möjligt för användare att läsa inlägg som lagts upp av de medtillräcklig behörighet. Det skapades en särskild sida för varje avdelning, där endast en avdessa sidor har arbetats på inför prototypen. På denna sida ser användaren inläggriktade mot sin grupp och ett forum där de i gruppen kan kommunicera samt enfilhanterare. Även en enklare evenemangsida skapades där det går att skapa eventssom sedan visas på startsidan. Det har även lagts en del tid på att göra sidan responsivför mobiler och surfplattor.

    Denna prototyp visar vad som är möjligt att ta fram med väldigt låg budget, 200 kronor,under kort tid.

  • Edlund, Marie-Louise
    Luleå University of Technology, Department of Engineering Sciences and Mathematics.
    Automatisk generering av nyckeltal från Vattenkraftsanläggning2020Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Ett strategiskt proaktivt arbete med fokus på teknisk status kan öka tillförlitligheten och säkerheten i vattenkraftsparken. Nyckeltal är ett verktyg för att beskriva aggregatens tillstånd och effekten av underhållsarbete, ett annat viktigt underlag för utveckling och underhållsbeslut är larmsta-tistik som bidrar med kunskap om den egna anläggningen. Den här studien undersöker möjligheterna att automatiskt generera relevanta nyckeltal från vattenkraftsanläggningar med utgångspunkt i gällande standarder, samt om det finns förutsättningar att standardisera larminformation som stödjer nyckeltalsberäkningar.

  • Hedman, Mattias
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    A practically developed approach to evaluate sonic interfaces of autonomous cars2020Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis was a part of the SIIC-project (Sonic Interaction in Intelligent Cars) initiated by FFI (Fordonsstrategisk forskning och innovation), consulted by Volvo, Pole Position Production and Research Institutes of Sweden. The SIIC-project was about exploring sonic tools to affect the experience of self-driving cars. Sonic tools is implemented practically as sonic interfaces. Because of its visionary character, it was key to establish a foundation regarding future relevant information, user problems and user scenarios. The ideation process generated three conceptual sonic interfaces that accommodated three found user problems; Motion sickness, Informational overload and Low trust towards self-driving cars. One of these concept was made a functioning prototype implemented in video of relevant user scenarios. Carefully chosen metrics (Self- Assessment Manikin-, Van der Laan’s Acceptance- and Likert-scales) were assembled into an evaluation method. The method, together with the vide prototype, was then implemented in study with 30 participant, providing analytical material to finally review the metrics of the eval- uation method. The Self-Assessment Manikin and Van der Laan’s Acceptance scale were thought to highly contribute to the evaluation of participants experience of the interface. The Likert scales were less contributing, either deemed to be poorly implemented or simply not suiting for the cause. Main indications shows sonic interfaces seems to be capable of increasing a sense of trust towards the self-driving car and this capability seems to be evaluable.

  • Andersson, Jasmine
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Investigation of carbon capture technologies for Sävenäs waste-to-energy plant2020Independent thesis Advanced level (professional degree), 300 HE creditsStudent thesis
    Abstract [en]

    Carbon capture technologies have the potential to decarbonize the emissions to air from the heat and power sector and contribute to the necessary greenhouse gas emission mitigation in order to meet the Paris Agreement requirements. The energy requirement and ability to retrofit carbon capture units are crucial to convert existing power plants into more environmental benign processes to meet the Swedish national goal of greenhouse gas neutrality at 2045. This report investigates the viability of carbon capture technologies at waste-to-energy (WTE) plants with a techno-economic analysis of the Sävenäs WTE plant in Gothenburg. Flue gas characteristics at WTE plants, with a carbon dioxide (CO2) concentration of ~10%, facilitates absorption techniques for post-combustion capturing which offers a high level of readiness and large-scale operations compared to other capture technologies.  

    To assess the feasibility of the carbon capture options, multicriteria aspects were considered covering energy requirement, environmental impact as well as economic advantages and disadvantages associated with CO2 emission abatement and loss of income due to energy withdrawal. Mass and energy balance calculations were executed based on steady-state assumptions and conservation of mass and energy in order to develop process models for carbon capture and thus expose process integration possibilities and the energy recovery potential. The balance calculations were performed for Monoethanolamine (MEA) and Chilled Ammonia Process (CAP) as they were the most promising absorption technologies at the time of this master thesis project.

    The calculations show that the energy efficiency at Sävenäs WTE plant is reduced by 32% using MEA solution on a yearly average. However, extensive energy recovery would be achieved by integrating a heat-pump to the treatment process combined with district heating integration. With this integration the energy efficiency was reduce only by 12%. Energy penalty associated with CAP was found to reduce the efficiency by 21%. Energy recovery solutions are primarily derived from district heating integration which result in a net energy efficiency reduction by 10%.

    Due to its location in Sweden the demand of heat produced at Sävenäs WTE plant is at its highest between October and March. The CO2 emission abatement and cost analysis showed that a carbon capture facility is preferable operating during summertime when most of the about 1.5 TWh heat distributed per year from Sävenäs WTE plant won’t have to be replaced with other less environmental benign and energy efficient sources. If captured biogenic CO2 is considered a negative emission, then the WTE plant would achieve carbon neutrality even by operating only six months per year due to the high fraction of biogenic content in the fuel mixture.        

    The process model for CAP revealed extensive water utilization to avoid ammonia slip and thus additional energy requirements associated with cooling. The flue gas treatment characteristics at Sävenäs WTE plant corresponds well with the specifications for CAP but nonetheless the location of the WTE plant does not offer a natural source of cooling water with a preferable temperature of 5ºC. Hence, MEA was found to be the most viable option for Sävenäs WTE plant with a high technological readiness and seasonal operation already proven feasible at large pilot-scale plants.

  • Li, Dan
    Luleå University of Technology, Department of Arts, Communication and Education.
    Förskolans möte med nyanlända familjer: En kvalitativ studie om förskollärares erfarenheter av att introducera nyanlända familjer i förskolans verksamhet2020Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med studien är att undersöka hur förskollärare beskriver kommunikation med nyanlända familjer vid introduktion på förskolan med förankring i det sociokulturella perspektivet och det interkulturella perspektivet. Studien har en kvalitativ ansats och använder semistrukturerade intervjuer som datainsamlingsmetod där fem förskollärare från två förskolor har intervjuats.  Det empiriska materialet analyseras genom att sortera, reducera, och tematisera insamlade data för att få fram resultatet. Framträdande i studiens resultat var att förskollärarna använde sig av multimodala uttrycksformer som kombinerade olika slags kommunikativa verktyg i kommunikationen med nyanlända barn när det verbala språket inte räckte till. Ur ett sociokulturellt perspektiv är kommunikation och språk viktiga verktyg för att kunna inkludera nyanlända barn och göra dem delaktiga i introduktionen. Det som framkom som mest centralt i resultatet var att trygghet ansågs som grundläggande för en god kommunikation mellan förskollärare och nyanlända familjer. Barnets modersmål visades som betydelsefull för att skapa trygghet hos nyanlända barn och dess vårdnadshavare. Resultatet visade även att mottagandet av nyanlända familjer var utmanande på grund av språkliga och kulturella barriärer samt förskollärarnas behov av kunskap om det interkulturella uppdraget. För att kunna möta dessa utmaningar krävs att förskollärare kontinuerligt reflekterar över sitt interkulturella förhållningssätt där öppenhet, respekt och medvetenhet utgör centrala beståndsdelar.

  • Manzoor, Sohail
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Liaghat, Samaneh
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Gustafson, Anna
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Johansson, Daniel
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Schunnesson, Håkan
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Establishing relationships between structural data from close-range terrestrial digital photogrammetry and measurement while drilling data2020In: Engineering Geology, ISSN 0013-7952, E-ISSN 1872-6917, Vol. 267, article id 105480Article in journal (Refereed)
    Abstract [en]

    Geologists, mine planners, geotechnical, and mining engineers always strive for maximum information to get a better insight of the rock mass before interacting with it. Over the recent decades, close-range terrestrial digital photogrammetry (CRTDP) has been increasingly used for data acquisition and to support the conventional methods for rock mass characterization. It provides a safe, time-saving and contact-free way to gather enough data to minimize user dependent biases. However, it requires an expensive camera, fieldwork and some software to extract the information from images. In addition, it can over-estimate the rock fracturing sometimes due to weathering of the rock face or poor blasting practices. Measurement while drilling (MWD) data include the responses of different drilling parameters to the variations in the rock mass. MWD data are produced in large quantity, as they come from every hole drilled. These data correspond to the inside variations of rock rather than the surface ones counted in photogrammetry.

    In this paper, structural data are obtained from different bench faces of an open pit mine using a commercial software package, ShapeMetriX3D (by 3GSM). These data are compared to the MWD data of the boreholes that were blasted to produce these bench faces to establish certain relationships between drilling parameters and rock mass structures. Half casts of the boreholes with MWD data were visible on the bench faces of the pre-split wall that allowed a better correlation. The results show abrupt changes in MWD parameters for open joints or cavities with some infilling material and overall increases or decreases in parameters for closely spaced bedding planes, fractures or foliations. The results are promising and suggest the method can be used to characterize the rock mass, modify the charging of explosives in blasting operations and facilitate the geological modeling of the rock mass.

  • Danstål, Martin
    Luleå University of Technology, Department of Arts, Communication and Education.
    Kan vi börja spela snart?: Ett utvecklingsarbete om musikteori i praktiken2020Student paper other, 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Detta utvecklingsarbete handlar om implementering av musikteoretiska kunskaper i praktiska musikaliska situationer. Gymnasieelever i årskurs 1 har under en period av 10 veckor haft under­visning i ensemblespel där fokus har legat på att integrera fundamentala teoretiska kunskaper i musi­cerandet för att sedermera utveckla det egna utövandet och den musikaliska kommuni­kationen. Tillvägagångssättet för att uppnå god utveckling inom detta område har varit att dels introducera musikteoretiska element bestående av kompskisser och ackordanalyser men även att diskutera dessa. Genom kvalitativ datainsamling i form av enkätundersökningar, fokusgrupps­intervju och handledarsamtal visade det sig att eleverna som undervisats under perioden till en början hade respekt för de teoretiska byggstenar som musik består av men samtidigt visade ett lågt intresse för att utveckla dessa färdigheter. Efter 10 veckor av verksamhetsförlagd utbildning var den pedagogiska intentionen att intresset för och förståelsen av denna typ av musikteori skulle ha ökat i takt med elevernas generella utveckling, vilket mina resultat också tyder på. Eleverna har under arbetets gång utvecklats som musiker men även ökat sin förståelse för hur det musikaliska utövandet hänger ihop med den musikaliska teorin, vilket jag hoppas och tror kommer att bana väg för deras framtida utveckling.

  • Carlsson, Mari
    Luleå University of Technology, Department of Arts, Communication and Education, Education, Language, and Teaching.
    Anonymiserad kamratrespons: Perspektiv på möjligheter och begränsningar i gymnasiets engelska skrivundervisning2020Student paper other, 5 credits / 7,5 HE creditsStudent thesis
    Abstract [sv]

    Kamratrespons där eleverna fungerar som resurser för varandra är en central del av den formativa bedömningen. Beroende på klassrumsmiljön är en konstruktiv kamratrespons dock mer eller mindre lätt att få till stånd. Detta utvecklingsarbete skedde i en klass som går andra året på ett gymnasialt ekonomiprogram. Syftet var att pröva om anonymiserad kamratrespons av engelskspråkiga skrivuppgifter kunde fungera där ”vanlig” kamratrespons inte gett önskat resultat, samt vilka andra eventuella fördelar eller nackdelar anonymiserad kamratrespons kan ha.Studien bygger på tidigare forskning kring anonymiserad kamratrespons samt forskning och teori kring formativ bedömning, motivation och stress och det offentliga rummet, liksom på gällande styrdokument. Undersökningen gjordes med hjälp av enkäter och intervjuer där samtliga frågeställningar rörde elevers upplevelser av och attityder till kamratrespons med kända deltagare och anonymiserad kamratrespons. Svaren sammanställdes och jämfördes med tidigare forskning.Resultaten visar att eleverna upplevde ökad motivering i samband med den anonymiserade kamratresponsen. Likaså hade anonym kamratrespons en positiv effekt på elevernas upplevda förmåga att värdera kvaliteten av andras texter. Det framstod inte som att eleverna var redo att genast övergå till kamratrespons med kända deltagare. Däremot visade sig anonymiserad kamratrespons vara ett snabbt sätt att få i gång ett fungerande arbete med kamratrespons.

  • Eriksson, Linda
    Luleå University of Technology, Department of Arts, Communication and Education.
    "Det barn ofta säger är, du får inte vara med på mitt kalas, eller tittar bort istället för att svara": Hur förskollärare definierar och arbetar med kränkande behandling i förskolan2020Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Studien syftar till att öka kunskapen om hur förskollärare i förskolan definierar och arbetar med kränkande behandling mellan barnen. I studien har kvalitativa intervjuer använts som metod för att få svar på hur förskollärare definierar kränkande behandling, vilka strategier som använts när kränkningssituationer uppstår och hur förskollärare arbetar för att motverka och förhindra att kränkningar sker mellan barnen i förskolan. Intervjuerna genomfördes på 3 olika förskolor med 5 förskollärare. Resultatet visar att förskollärare har en samstämmig definition om vad kränkande behandling innebär, och att det är mottagarens reaktion som avgör om det är en kränkande behandling eller inte. De poängterar även vikten av närvarande förskollärare i samspelssituationer. Är förskollärare närvarande kan kränkningarna upptäckas och hanteras i stunden. Orsakerna som beskrivs till varför kränkningar sker, är att barnen inte känner varandra nog väl och därför testar gränserna. Det beskrivs även att det kan handla om ett maktbeteende, och arbetslagets kommunikation och förhållningssätt till kollegor. För att förebygga och motverka kränkande behandling beskriver förskollärarna att det är viktigt att arbetslaget har en god kommunikation. Kommunikationen och hur kollegor talar till varandra speglar av sig på barnen. De beskriver vidare att om det är en god samvaro i gruppen så minskar risken att kränkningar uppstår.   

  • Franzon, Jonas
    Luleå University of Technology, Department of Arts, Communication and Education, Education, Language, and Teaching.
    Litteratur och dialogicitet i gymnasieskolan: elevattityder till boksamtal2020Student paper other, 60 credits / 90 HE creditsStudent thesis
    Abstract [sv]

    Abstract

    Detta utvecklingsarbete inom ämnet svenska för gymnasieskolan studerar gymnasieelevers attityder till en serie boksamtal. Dessa skedde i form av både två boksamtal med grupparbete till grund för diskussion i helklass och av avslutande examinerande boksamtal i mindre grupper i kursen Svenska 3 på det ekonomiska programmet. Utvecklingsarbetet anlägger ett perspektiv av dialogicitet, som i egenskap av bakgrund också inkluderas implicit i attitydundersökningen om boksamtalen.

    Undersökningens metod var pappersenkäten, genom vilken följande forskningsfrågor sökte sina svar: hur ser de deltagande gymnasieeleverna på boksamtalet som lärandeform, och hur uppfattar de betydelsen av dialog i fråga om förståelse av litteratur. Dialogicitet presenteras i rapportens teoridel främst genom Bakhtin (1963/1991, 1981/1988) samt genom tolkningar av dennes teorier (Dysthe, 1995/1996, 2001/2003).

    De viktigaste resultaten av undersökningen är att gymnasieeleverna såväl tycks känna sig tillfreds med arbetsformen boksamtalet som uppskatta dess betydelse för att främja den egna läsningen och litterära analysen. I enkätsvaren betonas betydelsen av gemensam diskussion för att nå de bästa resultaten i litteraturanalysen. Farhågor uttrycker eleverna exempelvis om rättvisa talturer.

    Resultaten tyder på en potential för att i hög grad använda boksamtalet vid litteraturläsning i gymnasieskolan. Genom ett perspektiv av dialogicitet och flerstämmighet förenas litteratur med dialog på ett naturligt sätt.

  • Hellberg, Johannes
    Luleå University of Technology, Department of Arts, Communication and Education, Education, Language, and Teaching.
    Gud i molnet: Ett utvecklingsarbete om datorstödd religionsundervisning2020Student paper other, 5 credits / 7,5 HE creditsStudent thesis
    Abstract [sv]

    Digitaliseringen av den svenska skolan har pågått under lång tid och med åtskilliga beslutfrån myndigheter och beslutande politiska församlingar. Detta utvecklingsarbete är ett försökatt i en skola, som nyligen genomfört en satsning med en Chromebook till varje elev,implementera en användning av digital teknik i ämnet religionskunskap. Syftet är att utforskaelevers kompetenser och strategier för en digital teknikanvändning samt stödja och utvecklaelvernas användning av dessa för att, i en skola med begränsad erfarenhet av digitala resurser,tillämpa och integrera dem i lärandet inom religionskunskap för ett djupare och rikarelärande. I utvecklingsarbetet kartläggs den digitala kompetensen hos eleverna i två klassersom också får arbeta med digital teknik i grupparbete och enskilt. Utvecklingsarbetet visar atteleverna har hög digital kompetens ifråga om kommunikation, om att söka information,kompletterande perspektiv och samarbete med varandra. Lärarens utmaning handlar om attfölja med i utvecklingen och uppdatera sin digitala kompetens så att den i någon mening kanmatcha elevernas för att skapa dialog och underlätta också den muntliga kommunikationen.Genom TPACK-modellens sätt att se på digital kompetens framgår det att digital kompetens isig inte är det samma som didaktisk kompetens med digital teknik som stöd.

  • Elfström, Gustav
    Luleå University of Technology, Department of Arts, Communication and Education, Education, Language, and Teaching.
    Kollaborativt lärande i geografi: Om kollaborativ undervisning och bedömning i geografi på högstadiet2020Student paper other, 12 HE creditsStudent thesis
    Abstract [sv]

    Syftet med detta utvecklingsarbete har varit att öka kunskapen om hur kollaborativ undervisning och en kollaborativ bedömningsprocess påverkar lärandet och måluppfyllelsen i ämnet geografi. Lektionsserien genomfördes med två klasser i årskurs 8. Kollaborativt lärande handlar om ett i högre grad delat ansvar mellan lärare och elever för undervisningens utformning, innehåll och bedömning samt att möjliggöra för eleverna att bygga kunskap tillsammans. Eleverna arbetade i grupp hela lektionsserien, gavs möjlighet att påverka undervisningens innehåll och gjordes delaktiga i bedömningsprocessen.

    Grunden i det didaktiska upplägget var att kunskapskraven utgjorde den röda tråden i lärandet men att eleverna utifrån intresse och förkunskaper kunde påverka innehållet.Klassrumsobservationer, elevers loggböcker, bedömningar av grupparbeten och intervjuer med sju elever har utgjort underlag för den kvalitativa analysen. Studien visar på skiftande förutsättningar bland eleverna att tillgodogöra sig det kollaborativa arbetssättet. Vissa elever gynnades av ökat inflytande och ansvar medan andra elever hade behövt tydligare ramar och instruktioner. En slutsats från dessa studie är att den kollaborativa ansatsen gav bra förutsättningar för att fånga elevernas intresse och bygga vidare på deras förkunskaper. Det skulle också behövas längre tid och mer övning för många elever för att fullt ut tillgodogöra sig arbetssättet.

  • Lööv, Sebastian
    Luleå University of Technology, Department of Arts, Communication and Education, Education, Language, and Teaching.
    Lärarens ledarskap i klassrummet2020Student paper other, 12 HE creditsStudent thesis
  • Sandling, Staffan
    Luleå University of Technology, Department of Arts, Communication and Education, Education, Language, and Teaching.
    Jag tror på Gud och Jesus men jag tror inte på bibeln: En fallstudie hur gymnasieungdomar formar sin tro utifrån sociala medier och kursen religion 12020Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of the study is to examine how Swedish upper secondary school students form their religious beliefs or non-beliefs. The study focusses on how they form their beliefs or non-beliefs from social media and the upper secondary course religion 1. The method used in this is phenomenological interviews with eight students. The findings from this study is that Swedish upper secondary students form their beliefs from their living network (family, friends and institutions) and the culture heritage. Social media are often used as a confirmation of those belief. None of the students think that the course religion 1 has any part in their formations of beliefs but are considered to give them insight in other people’s beliefs.

  • Önell, Pauline
    Luleå University of Technology, Department of Arts, Communication and Education.
    Konflikthantering - möjligheter och hinder: En studie som skildrar förskollärares uppfattningar om konflikthantering i förskolan2020Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
  • Jakobsson, Kalle
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Autonoma fordons påverkan på morgondagens trafiksäkerhetsplanering2020Independent thesis Advanced level (professional degree), 300 HE creditsStudent thesis
    Abstract [sv]

    Väginfrastrukturen är i konstant utveckling, parallellt sker en teknisk utveckling och ökning iantalet fordon som färdas på infrastrukturen. För att inte riskera att skadade och döda itrafiken ökar, behöver trafiksäkerheten utvecklas för att möta dessa nya anspråk i trafiken.Idag arbetar Sverige efter Nollvisionen som antogs redan 1997 men som på senare år fått nyttgenomslag då riksdagen fastställde en reviderad version 2016 som gav Nollvisionen ennystart. Inom fordonsindustrin har det, för att vidare arbeta mot Nollvisionen, introduceratsautonoma fordon som nästa steg i trafiksäkerhetsarbetet då denna teknik sägs eliminera denmänskliga faktorn och på så sätt göra trafiken säkrare.Examensarbetet syftar på att studera denna nya autonoma teknik och tillsammans med hurman arbetar med trafiksäkerhet idag ta fram de faktorer som förändrar hur man planerartrafiksäkerhet i morgondagens samhälle. Dessutom studeras hur denna teknik och de faktorersom tas fram fungerar och påverkas av Sveriges sommar- och vinterklimat.För att genomföra studien användes en kvalitativ metod med ett genomförande uppdelad i tredelar, en litteraturstudie som teoretisk grund följt av en praktisk del i form av enintervjustudie. Litteraturstudien genomfördes genom att studera artiklar, forskningsmaterialoch abstrakt publicerade på databaserna Google Scholar och Scopus. Intervjustudienresulterade i insamling av primärdata från aktiva inom relevanta branscher med hjälp avhalvstrukturerad metod och frågeformulär med 9-10 frågor. Sist analyserades resultaten vilketmynnade ut i slutsatser för arbetets frågeställningar.Baserat på var utvecklingen och testningen av autonoma fordon är i idag har det identifieratsett antal faktorer som kommer att påverka trafiksäkerhetsplaneringen i framtiden. I och medimplementering av autonoma fordon kommer en förändring ske i hur man planerar trafikenoch därigenom trafiksäkerhet på grund av dess funktioner. Digitalisering kommer att behövafå allt mer fokus och med denna utveckling kommer nya sätt att analysera trafikolyckor samtnya tillvägagångssätt för jämförelser och utredningar. Dessutom kommer tekniken i autonomafordon och det sätt den analyserar trafikmiljöer öka behovet av att göra trafikplatser enklaresamt att den information som förmedlar om hur man färdas genom eller till en plats tillgängligoch lättolkad för att underlätta körning i dessa komplexa miljöer.Vid Sveriges vinterförhållanden med snö och is blir dessa trafikmiljöer allt mer komplexa förautonoma fordon. Men på grund av att fordonet alltid analyserar vägförhållanden, väder samtser de eventuella risker som finns för färd tillsammans med sin egen körförmåga kan fordonet,vid snö och is på vägar, välja att inte köra över huvud taget. Istället kan de utvecklingsfaktorersom tagits fram i studien istället underlätta vid dessa komplexa förhållanden med nya sätt attunderhålla och handskas med dessa klimat. Med en allt mer utvecklad kartläggning avkörbara vägar samt mer avancerade sätt att underlätta navigering för autonoma fordon vidsnötäckta vägar.

  • Öberg, Vera
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Gånginducerade vibrationer i korslimmade träbjälklag: Hur ökad massa påverkar maximala spännvidder2020Independent thesis Advanced level (professional degree), 300 HE creditsStudent thesis
    Abstract [en]

    An effect of our rapidly growing cities and communities is the increased need for both large and sustainably built structures. Cross-laminated timber, or CLT, is a comparatively new construction material presented as a solution to this problem. However, CLT floors are similar to other timber floors in that vibration criteria limit its possible span lengths. The design of CLT floors is usually based on the same regulations intended for traditional timber floors, which may be problematic due to CLT floors being heavier. A greater self-weight can be both a liability and an advantage in a dynamic analysis – a liability because of the floor’s decreased eigenfrequencies and an advantage since the vibrations’ peak acceleration is also decreased.

    Considering this, the purpose of the thesis was to increase knowledge on walking-induced vibrations in CLT floors and how the floors’ self-weight affects these vibrations. A part of the purpose was also dedicated to investigating whether an increased self-weight in chosen floors – without an increase in stiffness – would lower the acceleration enough to compensate for the decreased eigenfrequencies. The aim was partly to see if a mathematical relationship between the floors’ self-weight and their possible spans according to standard EUR 24084 EN could be stated, and partly to create a foundation for further research and development regarding vibrations in CLT floors.

    The longest possible span for two types of CLT floors – one 5-ply and one 7-ply panel – with different amounts of heavy filling added was sought. The study respectively considered deflection limits, the limit f1 > 8 Hz and an upper limit for the parameter OS-RMS90 for floors where f1 ≤ 8 Hz. The experiments were carried out using the finite element method in Dlubal RFEM.

    The results were that the possible spans for the two types of floor decreased in every experiment when the added mass was increased, except regarding the two heaviest floors based on the 7-ply panel where the spans according to EUR 24084 EN increased again. This was due to the great self-weight causing spans to be accepted even where the eigenfrequencies were within the most disadvantageous domain (f1 ≈ 2 Hz). Because of this sudden increase the author could not describe a mathematical relationship between the floors’ self-weight and their possible spans according to EUR 24084 EN.

    The results also showed that for every test subject the regulation f1 > 8 Hz was the determining factor if the floor’s boundary conditions were hinged. However, considering the assumption that the floors’ relatively heavy self-weight causes a dynamic analysis with rigid boundaries to be more accurate, deflections were actually the limiting criteria. This was deemed significant since it could mean that CLT floors have been too conservatively designed if the assumption has been made that they, like other timber floors, should be modelled with hinged boundary conditions in the dynamic analysis. Even if the floors without heavy filling would only gain 0,3 and 0,6 m respectively, it could mean even more leeway for structural engineers if the deflections were to be managed using for example a pillar or a precamber. In the case of this study’s 5- and 7-ply panels that would mean being able to reach spans up to 8,5 and 8,9 m respectively before reaching the limit f1 > 8 Hz.

  • Alm, Sara
    et al.
    Luleå University of Technology, Department of Health Sciences.
    Weins, Helena
    Luleå University of Technology, Department of Health Sciences.
    Sjuksköterskors erfarenheter av att stärka patienters egenmakt i psykiatrisk öppenvård2020Independent thesis Advanced level (degree of Master (One Year)), 40 credits / 60 HE creditsStudent thesis
    Abstract [sv]

    Bakgrund: Egenmakt definieras som individens valfrihet, inflytande och kontroll över den egna livssituationen. Det finns ett stort behov av ökad egenmakt hos individer med psykisk ohälsa och arbetet med att stärka patienters egenmakt är en viktig arbetsuppgift för sjuksköterskan i den psykiatriska vården. Delaktighet är en betydande faktor för egenmakt, dock finns en mängd faktorer som försvårar patientens delaktighet i vården, främst i form av tillgänglighet, tid och verksamhetens resurser. Syfte: Syftet med denna studie var att beskriva sjuksköterskors erfarenheter av att stärka patienters egenmakt i psykiatrisk öppenvård. Metod: Totalt 8 sjuksköterskor som arbetar inom psykiatrisk öppenvård har intervjuats utifrån semistrukturerade intervjuer. Intervjuerna har analyserats enligt kvalitativ innehållsanalys med en induktiv ansats. Resultat: I analysen framkom tre slutkategorier som beskrev sjuksköterskornas erfarenheter av att stärka patienters egenmakt; “Att anpassa vården efter patientens förutsättningar”, “Att våga släppa taget” samt “Att behöva förhålla sig till teamet och organisationen”. Slutsats: Resultatet visade att arbetet med att stärka patientens egenmakt är en viktig del av omvårdnadsarbetet i den psykiatriska öppenvården, samtidigt som detta även kan upplevas både svårt och utmanande för sjuksköterskan. Det framkom att sjuksköterskan anser att det kan finnas risker med patientens egenmakt beroende på patientens förutsättningar och förmågor. Även vikten av att sjuksköterskan är medveten om maktobalansen i vården belystes. Resultatet visade att sjuksköterskans arbete med att stärka patientens egenmakt dock ofta försvåras av resursbrist, men även på grund av vårdkulturen. För att möjliggöra sjuksköterskans arbete med att stärka patientens egenmakt behöver sjuksköterskan ges förutsättningar för detta genom tillräckliga resurser samt stöd från kollegor och ledning. 

  • Gomez Kuri, Zaida
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Atmospheric Turbulence Study Utilizing a Five-Hole Probe on an Unmanned Aerial Vehicle (UAV)2020Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
  • Lundmark, Therese
    et al.
    Luleå University of Technology, Department of Health Sciences, Nursing Care.
    Bergman, Sanna
    Luleå University of Technology, Department of Health Sciences, Nursing Care.
    Specialistsjuksköterskors erfarenheter av vårdtillgänglighet för patienter med samsjuklighet inom psykiatrisk öppenvård2020Independent thesis Advanced level (degree of Master (One Year)), 40 credits / 60 HE creditsStudent thesis
    Abstract [sv]

    Bakgrund: Tillgång till sjukvård mäts i hur väl hälso- och sjukvården når ut till befolkningen utan att någon exkluderas. Genom att säkerställa att vårdtillgängligheten är hög så förbättras människors hälsa, livslängden förlängs och ojämlikheter när det gäller hälsa minskar. Utsatta grupper kan uppleva hinder som stoppar dem från att få tillgång till vård, detta leder till negativa konsekvenser för livskvaliteten och socioekonomiska skillnader i befolkningen. Studier tyder på att patienter med samsjuklighet kan vara en grupp som av olika anledningar får en försvårad tillgång till vård

    Syfte: Att undersöka specialistsjuksköterskors erfarenheter av vårdtillgänglighet för patienter med samsjuklighet i psykiatrisk öppenvård.

    Metod: Åtta intervjuer med specialistsjuksköterskor som arbetade eller har arbetet i psykiatrisk öppenvård genomfördes och analyserades genom kvalitativ innehållsanalys.

    Resultat: Analysen resulterade i ett huvudtema: “En avvisande vård” samt tre subteman: “Att vården präglas av kontraproduktiva regler”, “Brist på ansvarstagande gör att patienter bollas runt” och “Fördomar och kunskapsbrist leder till att patienter skuldbeläggs”. Resultatet av vår studie visar på behovet av att förbättra vårdtillgängligheten för patienter med samsjuklighet då de i dagsläget exkluderas. Vårdtillgängligheten för personer med samsjuklighet sker inte på lika villkor som för andra patientgrupper inom psykiatrisk öppenvård och dessa patienter avvisas. Vården präglas av försvårande och kontraproduktiva regler och deltagarna hade erfarenheter av att ingen tar ett övergripande ansvar för patienter med samsjuklighetsproblematik. Det finns en kunskapsbrist och fördomar inom vården av dessa patienter idag, vilket leder till att de skuldbeläggs för sin sjukdom.

    Diskussion: Att inte erbjuda en tillgänglig vård för patienter med samsjuklighet kan få förödande konsekvenser för både de enskilda patienterna men också på samhällsnivå. Negativa attityder behöver bytas ut mot evidensbaserade metoder där missbruk erkänns som en sjukdom. Rätt vård kan innebära att dessa patienter återhämtar sig men att de ska klara detta på egen hand är högst osannolikt. Vårdtillgängligheten för denna patientgrupp är bristfällig och har stora behov av en snabb förändring.

  • Ishikawa, Kunio
    et al.
    Department of Biomaterials, Faculty of Dental Science, Kyushu University, Maidashi, Higashi-Ku, Fukuoka, Japan.
    Garskaite, Edita
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering. Institute of Chemistry, Vilnius University, Vilnius, Lithuania.
    Kareiva, Aivaras
    Institute of Chemistry, Vilnius University, Vilnius, Lithuania.
    Sol–gel synthesis of calcium phosphate-based biomaterials: A review of environmentally benign, simple, and effective synthesis routes2020In: Journal of Sol-Gel Science and Technology, ISSN 0928-0707, E-ISSN 1573-4846Article, review/survey (Refereed)
    Abstract [en]

    In this review article the available results about application of sol–gel synthesis method for the preparation of different calcium phosphates and composite materials are summarized. The attention is paid to calcium phosphate-containing compounds which show the biological properties and could be used as potential phosphate bioceramics in medicine. It was demonstrated that the sol–gel synthesis method is a powerful tool for the synthesis of calcium hydroxyapatite and other phosphates, and different calcium phosphate-based composites at mild synthetic conditions resulted in high reproducibility, high phase purity, and desired morphology. Thus, the sol–gel synthesis method enables the researchers to develop biomaterials with superior features in terms of biomedical applications.

  • Sabau, Gabriel
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
    Lagerqvist, Ove
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
    Baddoo, Nancy
    Steel Construction Institute, UK.
    Stronger steels, higher penalties: Evaluation of flexural buckling experiments performed on welded high-strength steel struts2019In: ce/papers, E-ISSN 2509-7075, Vol. 3, no 3-4, p. 731-736Article in journal (Refereed)
    Abstract [en]

    Stability in a structural mechanics context has posed a continuous problem throughout history for mathematicians, engineers and architects. Flexural buckling is one of the main problems steel structures are faced with in order to ensure an economic design. Different equations have been derived to estimate critical loads that could lead to collapse of compressed members. The buckling resistance of compressed struts are calculated in Europe using the European buckling curves. The method of calculating the resistance implies the use of a reduction factor based on 5 different buckling curves. These buckling curves differ based on type of cross-section, fabrication method and steel grade. The method has been generally accepted since it proved to be reliable and versatile. The current design codes are assigning the same relevant buckling curve to the sections made of steels with yield stress of above 460 MPa. This conservative approach is one of the reasons that discourages the use of high-strength steels in common structural applications, since the designer does not see a direct benefit from the additional steel strength. The first part of the paper briefly describes the origin of the European buckling curves. The second part presents two analytical models for calculating flexural buckling limit loads. Flexural buckling experiments performed on welded box and I-sections made of high-strength steel, with the yield stress in the range of 690-960MPa. The third part analyses the existing buckling experiments and statistically evaluates the models proposed for estimating the resistance of high-strength steel struts subjected to pure compression. The final part addresses the potential future research in the context of developing adequate flexural buckling curves for high strength steel (HSS) members.

  • Danielsson, Clara
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.
    Mapping of Material Transportation Routes in Production for Optical Measurement Instruments With The Purpose of Improving Efficiency2020Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
  • Hjulfors, Jenny
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Undersökning av möjlighet till underjordisk vattenrening: En förstudie av kväverening med flytande våtmarker2020Independent thesis Advanced level (professional degree), 300 HE creditsStudent thesis
    Abstract [en]

    The mining company LKAB operates an iron ore mine in Kiruna and is currently mining towards the main level at the depth of 1365 meters. Because of the depth, large amounts of groundwater come into the mine and this water has to be pumped away for the production to continue. During its way through the mine, the water is contaminated by, for example, explosive residues such as nitrogen compounds which needs to be removed.

    The water is today cleaned by a tailing pond and a clarification pond, but this method removes only small amounts of the nitrogen compounds. In order to remove nitrogen from the water, experiments have been performed with nitrogen removal plants in the recipient. The trials show on good results, but the problem is still remaining because of the limited growing season in the northern climate. An idea that has emerged is to move the vegetation and the purification process down into the mine where the temperature is constant, in order to be able to reduce nitrogen year-round.

    This Master’s thesis has investigated if the idea is feasible and what the plants require to be able to grow in the mine. The work is limited to the nitrogen in the water and does not investigate how the nitrogen removal processes in the plants work in the underground climate. The study shows on good possibilities for nitrogen removal in the mine where the existing pools can be used together with plant lights to give the plants opportunity to live underground.

  • Ingesbo Sjöström, Lina
    Luleå University of Technology, Department of Engineering Sciences and Mathematics.
    Metal Additive Manufacturing on the Nordic Market: Opportunities and Challenges2020Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    When thinking about additive manufacturing (AM), or 3D printing as most people knows it as, it is probably considered a modern technology, but the first 3D printer was actually released in 1987. But it is not until recently that companies have started to look more into the method for end use part manufacturing, since the patents for AM equipment expired in 2014. AM was mainly used for prototype manufacturing in the beginning, but since several different materials can be used for the technology now, there among metal, the parts made with AM can also be used for critical applications.

    The aim of the report was to investigate the opportunities and challenges for companies in the Nordics to use AM as a manufacturing method. To do this a survey was sent outin the beginning of the project to get a better understanding of how companies already uses AM and what other companies would need to consider implementing AM in their production. When a sufficient number of responses had been received, questions were designed based of the answers from the survey to use in interviews, with companies that somehow are involved with the AM industry.

    Based of the interviews it could be seen that all of the interviewed companies agreed that there is a lack of knowledge within AM and that the market for it is still immature. But if more people gets educated within the field and have faith in the technology, AM shows great potential, because it is already industrially applicable for end use part production.

  • Noosalung, Kitiphum
    et al.
    Luleå University of Technology, Department of Engineering Sciences and Mathematics.
    Aasa, Erik
    Luleå University of Technology, Department of Engineering Sciences and Mathematics.
    Quality assurance in low-volume assembly line at Scania2020Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Scania are now going through a transformation process from being a supplier of trucks, busses and engines to a supplier of complete and sustainable transport solutions. Scania's transmission assembly department in Södertälje is facing a variation of changing challenges linked to the powertrain and customer of tomorrow. Some of the challenges is related to assuring quality on low-volume electrified and hybridised products. In this thesis quality assurance of a low-volume assembly line at transmission's department has been investigated.

    The aims for the thesis project are to evaluate today's methods, equipment and process descriptions for how quality assurance are handled and how it can be implemented in a low-volume assembly line. The aim is to investigate what kind of quality assurance methods exist within Scania but also externally. The purpose is to give suggestions for Scania on which quality assurance methods are suitable for Scania's low-volume assembly line. Today the current level of quality assurance in a low-volume line is considerable low and the production have many processes between start and delivery. The production start with an order initiation which prints out a list of assembly order and included parts. The processes are manually handled by one operator from the beginning to the end and the work includes assembly, material picking and quality control. Due to limitations and lack of equipment, the assembler have a lot of responsibility. The processes are also lacking of traceability and have a high risk for allowing deviations to be build in the product. The current processes leads to increased risks of rework, longer lead time and lower quality.

    The thesis project started with a literature study with the focus on quality, quality assurance and lean production. A current state analysis was done to gain knowledge of the processes and to identify problems within the current state. Identified problems were through observations, interviews and analysis of PFMEA document. The problems were risks that could affect quality of the product, and it was then categorized into three major risk groups; pick, place and tools. To seek which equipment there are to handle these risks, how other companies and departments are working with quality assurance, internal and external study visits were carried out. Internally within Scania; Smart Factory Lab, Engine Assembly and Chassis Assembly. Externally; Volvo Group Trucks Operations Köping and Volvo CE Arvika. The results of the visits were evaluated to create a solution to make a suitable suggestion in term of cost, quality and flexibility for Scania.

    The thesis project resulted in a study that showcase what quality assurance methods and equipment existed on the market and what other companies are using to quality assure. The result is that for similar production, the companies are using rather similar methods and equipment. Equipment to handle risks, deviations involving picking materials and assembly. For Scania's low-volume production a solution and a recommendation of equipment was given. To handle the existing deviations and for upcoming similar low-volume production. Quality assurance equipment and methods are expensive but is considered necessary, a necessary cost and necessary waste. Scania is recommended to invest in short and long term solutions where the short term is to improve the current state. In a short term to secure the picking operations with easier solutions of dividing parts into boxes or trays on the cart during transportation from shelves. Installing pick to light connected to nutrunners for critical parts and further develop the digitalized checklist for improving visualization. In longer term, Scania should invest in quality assurance equipment for low-volume lines. Prioritize and invest in creating infrastructure for connection between equipment and tools to secure critical parts in early stages of the project. Finally, create a communication between Scania's internal plants in order to further improve and share the quality assurance knowledge.

  • Sandberg, Alexander
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    Design and implementation of an administration portal: A web application interface with focus on accessibility and usability2020Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The last few years, giant companies like Facebook and Google have taken over the publishing market by attracting both advertisers and users to their platforms. This has caused smaller news publishers to lose their influence and their independence in the industry. To combat this trend, Newsadoo is on a mission to establish a collaborative news platform that benefits everyone involved. To help fulfill the company’s vision, the platform’s content has to be easily moderated by both Newsadoo and its partners to make sure that it satisfies the users’ needs.

    This master thesis concerns the design and implementation of a new solution for Newsadoo’s administrative portal, which will allow both internal administrators and external partners to moderate the content in Newsadoo’s main product. The work was done on site at Newsadoo’s office in Linz, Austria, during the fall term of 2019.

    The project progressed in bi-weekly sprints based on the principles of Lean UX, which were comprised of methods common to projects revolving around interface design and development. These were methods like user flows, site architecture mapping, wireframing, and different forms of testing and evaluation.

    The project resulted in Newsadoo Backoffice, a user interface with focus on accessibility and usability that facilitates easy moderation of Newsadoo’s main product. Newsadoo Backoffice is also a potential selling point for the company when trying to find new publishing partners to collaborate with, as this new solution also provides partners with useful data and knowledge on their own company’s performance.

  • Snellman, Emma
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    Var Finlands sak vår?: En jämförande studie av norrbottninska dagstidningars skildrande av Vinterkriget 1939-1940.2020Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • Stare, Felix
    et al.
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    Hansson, Victor
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    User experience and occupant safety: Concept development of restraint system for the automobile outboard rear seat positions2020Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This is a master thesis project that is made in collaboration with Volvo Car Corporation, at the seat belts & child restraints department, located in Gothenburg, Sweden. The project description and objective of this project was to develop a concept, for the rear outboard seat positions, that makes the seat belt comfortable without compromising the safety with the focusing point on user experience. The safety systems of the car can be divided into two groups, active safety systems, and passive safety systems. The active safety systems help to prevent accidents from occurring and the passive safety systems are there to protect the occupants from serious injury in the event of an accident. Passive safety systems include airbags and seat belts, which are required by law in most countries. The seat belt system is the primary restraint system in the car. A challenge with current seat belt systems is to make one single seat belt geometry that fits all users optimally. A less than optimal seat belt geometry could lead to the belt rubbing against the neck with the possibility of misuse as a consequence or being positioned too far out on the shoulder, which makes the risks of torso rollout and injuries increase.The safety in the rear seat has been prioritized recently due to the new requirements stated by European New Car Assessment Programme, which is a new car assessment programme, that tests and evaluates different safety aspects of cars. Another reason is Volvos vision that no one should be killed or seriously injured in a new Volvo car by 2020, which is a continuous ongoing work of improving safety.This project has used a combination of the stage-gate process and a prototype-based process, which enabled prototype building and testing throughout the whole development. The Stage-Gate process was divided into 4 stages. These stages were Context immersion, Ideation, Implementation, and Finalization. At the end of each stage, there is a gate, meaning some things that needed to be delivered to Volvo Cars before proceeding on to the next stage.The work resulted in two concepts that are based on two different principles. Concept Ridge is a concept where the seat belt automatically adjusts to the occupant. The concept is based on that occupants with shorter torso needs a more outboard position in order to prevent the seat belt rubbing against their neck. It works by having a slanted surface placed on top of the seat that ‘guides’ the seat belt into an outboard position. If the occupant has a tall torso the shoulder belt barely touches the surface and therefore moves to its default inboard position. Ridge has been tested and evaluated with both crash test dummies and people with different statures and proportions since the crash dummies do not reflect people in reality.The other concept, Soft, is based on only having one static position and instead make the seat belt comfortable by covering it with a soft tube. Soft has the advantage of making the belt comfortable even when it is located in a safe position close to the occupant’s neck.

  • Widstrand, Marcus
    et al.
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    Andersson, Samuel
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    Assessing required safety measures for belt conveyors: Designing a safety assessment tool regarding standard 620+A1:20102020Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This is a Master of Science Thesis in Industrial Design Engineering conducted at Luleå University of Technology with the orientation towards product design and development. This report comprises 30 credits, started autumn 2019 and ended in the beginning of 2020. This thesis was done together with SITE, in cooperation with LKAB to together find a solution that could verify standard 620+A1:2010, to conclude if requirement of engaging more protection at belt conveyors would be necessary.

    The purpose of this master thesis is to find a solution in the form of a safety assessment tool which could aid investigations regarding standard 620+A1:2010 and whether the requirements are fulfilled or not regarding nip points on carrying and return idlers. This thesis also includes additional requirements given by LKAB that must be followed. The result should consist of a concept that can, with the help of a 50x50mm plate, determine if a conveyor belt can be lifted 50 mm with a force of 150 N.

    To be able to find a solution to this problem a design process named Snowflake has been used which consists of four phases: Context, Ideation, Concept and Product. The work is built on a theoretical framework with topics such as industrial design engineering, belt conveyors, ergonomics, user experience, interaction design and usability. This, combined with several creative methods to enhance creativity and inspiration followed by an extensive evaluation process, enabled the project team to develop a solution to the acknowledged problem.

    The project resulted in a conceptual tool that, with the help of a torque wrench, can determine the amount of force required during a safety assessment. Its shape allows measurements to be performed on belt conveyors with a vast variety of roller dimensions. The tool is designed to allow the user to use minimal effort to operate in all its usage stages, from carrying the tool to using it. By having a distance gauge that moves when the tool lifts the belt and stays at the threshold value, the results can be read away from the nip point which increases user safety and usability.

    The result fulfils the stated criteria and is therefore considered to be a successful result, but it may also serve as a foundation for further development considering the extensive theoretical research which supports the design and functions, despite it being a conceptual product.

    In the end, the project has resulted in a tool that clearly answers whether safety protectors are required for belt conveyors at nip points, according to parameters stated in safety standard 620+A1:2010, regarding carrying and return idlers.

  • Aparicio Rivera, Jorge
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Real time Rust on multi-core microcontrollers2020Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Today the majority of embedded software is written in C or C++ using the thread paradigm. C and C++ are memory unsafe programming languages that often appear in CVE (Common Vulnerability and Exploits) reports. Threads are a popular concurrency paradigm in SMP (Symmetric Multi Processor) systems; however, threads can deadlock and are hard to statically analyze for schedulability. At the same time, security is becoming more and more important thanks to the exponential grow of IoT (Internet of Things) devices; meanwhile, vendors are starting to ship more and more heterogeneous multi-core devices where the thread paradigm can not be applied. In this thesis, we present an alternative programming framework for building real time, safety critical and general purpose embedded software that is memory safe by construction and suitable for single-core, homogeneous multi-core and heterogeneous multi-core systems.

  • Petersson, Marcus
    et al.
    Luleå University of Technology, Department of Health Sciences, Nursing Care.
    Murtagh, Stephanie
    Luleå University of Technology, Department of Health Sciences, Nursing Care.
    Påskyndad död: En systematisk litteraturöversikt2020Independent thesis Basic level (degree of Bachelor), 180 HE creditsStudent thesis
  • Danell, Maria
    Luleå University of Technology, Department of Arts, Communication and Education.
    Barns perspektiv på delaktighet och inflytande i förskolan: "Vi bestämmer men fröken skriver, så att man vet vad man menar eller liksom tänker..."2020Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
  • Hobro, Filip
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Undersökning av hur nitrokarburering påverkar kolvar från Epiroc2020Independent thesis Basic level (professional degree), 180 HE creditsStudent thesis
    Abstract [en]

    The degree project has been done at the quality department at Epiroc in Fagersta aspart of the continuous quality control work that takes place there. In the project, it hasbeen investigated how a piston in a down-the-hole hammer is affected by the heattreatment process called nitrocarburization which is performed to give the material anincrease in surface hardness. The main part of the project has been to measure theproducts of interest in a measuring machine before and after nitrocarburization andthen analyzing the result. After the measurements had been made it could beobserved that there was an increase in dimension on the locations of the piston beingmeasured.

  • Alshammari, Musa
    et al.
    College of Engineering, University of Kerbala, Karbala, Iraq.
    Al Juboury, Maad F.
    College of Engineering, University of Kerbala, Karbala, Iraq.
    Naji, Laith A.
    Department of Environmental Engineering, College of Engineering, University of Baghdad, Baghdad, Iraq.
    Faisal, Ayad A. H.
    Department of Environmental Engineering, College of Engineering, University of Baghdad, Baghdad, Iraq.
    Zhu, Hongshan
    Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, P.R. China.
    Al-Ansari, Nadhir
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Naushad, Mu
    King Saud University, Riyadh, Saudi Arabia.
    Synthesis of a Novel Composite Sorbent Coated with Siderite Nanoparticles and its Application for Remediation of Water Contaminated with Congo Red Dye2020In: International Journal of Environmental Research, ISSN 1735-6865, E-ISSN 2008-2304Article in journal (Refereed)
    Abstract [en]

    Re-use of the byproduct wastes resulting from different municipal and industrial activities in the reclamation of contaminated water is real application for green projects and sustainability concepts. In this direction, the synthesis of composite sorbent from the mixing of waterworks and sewage sludge coated with new nanoparticles named “siderite” (WSSS) is the novelty of this study. These particles can be precipitated from the iron(II) nitrate using waterworks sludge as alkaline agent and source of carbonate. Characterization tests using X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) mapping revealed that the coating process was correctly achieved and siderite nanoparticles were planted on the surface of the composite sorbent. Interaction between Congo Red dye and composite sorbent was evaluated through a set of batch tests under the variation of agitation time, pH of aqueous solution, and sorbent dosage. The results proved that the prepared sorbent had a high ability in the treatment of water contaminated with Congo Red dye in comparison with previous studies and the maximum adsorption capacity reached to maximum value i.e. 9416 mg/g. The sorption process was governed by electrostatic attractions; however, Sips and Pseudo-second-order models described this process with coefficient of determination greater than 0.99.

  • Al Amli, Ali Sabah
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering. Department of Civil Engineering, Al-Mustansiriyah University, Palestine Street, Baghdad, Iraq.
    Al-Ansari, Nadhir
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Laue, Jan
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Numerical simulation of behaviour of reinforced concrete bars in saturated soil using theoretical models2020In: Journal of Engineering Science and Technology, ISSN 1823-4690, Vol. 15, no 1, p. 392-405Article in journal (Refereed)
    Abstract [en]

    This study presents a nonlinear analysis for square reinforced concrete (RC) foundation slab with bars used with both unsaturated and saturated soils in order to investigate, which response is affected by loading. Different parametric studies are undertaken in this study to determine the effect of load-displacement relationships for RC member or foundation with different cases such as (the distance of bars, diameters of bars reinforcement, types of reinforcement bars steel bars and geogrid reinforcement, yield stress for reinforcement and modulus of elasticity with compressive strength for concrete). A finite element model by ABAQUS software program is used to predict the load versus vertical displacement response of the tested RC foundations with soil by using other researchers´ experimental results. The present finite element models account for the constituent load-displacement behaviour between the RC foundations with soil and the effective load. The numerical results were compared with the experimental results obtained from other research, and good correlations were obtained. The models developed in this study can accurately capture the behaviour and predict the load-displacement of RC foundation with soil. This study shows that geogrid reinforcement enhanced the capacity of the foundation or member when used with different ratios of steel bars in soil and this provides a sustainable solution by reducing steel reinforcement. This geogrid ratio the reinforcement, while the member in saturated soil

    is less strong than it when in unsaturated soil.

  • Ahmed, Dooraid N.
    et al.
    Department of Mathematics, College of Education for Pure Sciences, University of Kirkuk, Kirkuk, Iraq.
    Naji, Laith A.
    Department of Environmental Engineering, College of Engineering, University of Baghdad, Baghdad, Iraq.
    Faisal, Ayad A. H.
    Department of Environmental Engineering, College of Engineering, University of Baghdad, Baghdad, Iraq.
    Al-Ansari, Nadhir
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Naushad, Mu.
    Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia.
    Waste foundry sand/MgFe-layered double hydroxides composite material for efficient removal of Congo red dye from aqueous solution2020In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 10, p. 1-12, article id 2042Article in journal (Refereed)
    Abstract [en]

    We aimed to obtain magnesium/iron (Mg/Fe)-layered double hydroxides (LDHs) nanoparticles-immobilized on waste foundry sand-a byproduct of the metal casting industry. XRD and FT-IR tests were applied to characterize the prepared sorbent. The results revealed that a new peak reflected LDHs nanoparticles. In addition, SEM-EDS mapping confirmed that the coating process was appropriate. Sorption tests for the interaction of this sorbent with an aqueous solution contaminated with Congo red dye revealed the efficacy of this material where the maximum adsorption capacity reached approximately 9127.08 mg/g. The pseudo-first-order and pseudo-second-order kinetic models helped to describe the sorption measurements, indicating that the physical and chemical forces governed the removal process.

  • Bark, Emma
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Jonsson, Malin
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Solutions to Close an Informal Dumpsite in Debre Berhan, Ethiopia2020Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The rapid urbanisation in developing countries has outran the deployed financial and manpower resources that are supposed to handle public utility services in cities. One important service is solid waste management. The most common method used for solid waste management in developing countries is uncontrolled dumping of waste at unstructured and uncovered open dumpsites. Open dumpsites are related to pollution and safety aspects and creates environmental stress and health problems.

    The purpose of this thesis project was to minimise environmental and public health risks from an informal dumpsite in Debre Berhan, Ethiopia, by identifying solutions for a sustainable way of closing the site. The project was a complement to the SymbioCity in Ethiopia project and consisted of a literature study, a field excursion to the dumpsite, and interviews with involved parties and evaluations. The focus has been to find economical and accessible solutions to close the dumpsites in an environmentally friendly way.

    During the project, it was found that the closure of the informal dumpsite is not possible right away. Before closing the informal dumpsite, a waste disposal plan is required to ensure that the site can be closed without continued dumping. Therefore, the recommendation is to divide the closure into post- and pre-closure actions.

    The most economical and sustainable solution to close the informal dumpsite is to use local material when covering the waste. It is also important to choose available techniques for control of emissions that can be managed easily in the future. It is necessary to collect the generated landfill gas to minimise the pressure on the cover. It is recommended to redirect the inflow of surface water from the area above the dumpsite to reduce the leachate and control the erosion of the cover. It is suitable to use embankment and swales for redirection of the surface water.

  • Olofsson, Anna
    et al.
    Luleå University of Technology, Department of Arts, Communication and Education.
    Taavo Sidér, Nora
    Luleå University of Technology, Department of Arts, Communication and Education.
    Förskollärares konstruktioner av undervisning: En kvalitativ studie om förskollärares konstruktioner av undervisning utomhus och inomhus2020Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med studien var att undersöka förskollärares konstruktioner av undervisning utomhus respektive inomhus i relation till ett socialkonstruktionistiskt perspektiv. Studien baserades på en kvalitativ metod med intervjuer som datainsamlingsmetod. Fem intervjuer har utförts, vilka var belägna inom en och samma region, där förskollärarnas svar ligger till grunden för studiens resultat. Det som var framträdande i resultatet var att konstruktionerna utomhus och inomhus skiljde sig åt. Utomhus skedde fler spontana undervisningstillfällen, medan det inomhus till större del var planerat. Resultatet visade även att förskollärare hade svårigheter i att skilja begreppen utbildning, undervisning och lärande åt. Under bearbetningen av analysen sorterade, reducerade och argumenteras materialet, vilket utgjorde olika teman i resultatet; förskollärares konstruktioner av undervisning, undervisning inomhus och undervisning utomhus.

  • Shamasaki, Shahrzad
    et al.
    Luleå University of Technology, Department of Health Sciences, Nursing Care.
    Khan, Hina
    Luleå University of Technology, Department of Health Sciences, Nursing Care.
    Kvinnors upplevelse av att leva med könsstympning: Analys av självbiografier2020Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Ordet kvinnlig könsstympning omfattaralla tillvägagångssätt, bådedelvis eller fullständigt borttagande av kvinnliga könsorgan. Det finns cirka 130–140 miljoner könsstympade kvinnor över hela världen. Ingreppet medför många hälsorisker och komplikationer för kvinnan. Genom att tillämpa kunskap om könsstympning i vården avdrabbade kvinnorkan sjukvårdspersonal erbjuda stöd i form av att aktivt lyssna på kvinnors perspektiv och problem.Syftet med studien var att beskriva upplevelser hos kvinnor som könsstympats. Metoden som valdes var kvalitativ innehållsanalys baserat på tre självbiografier avkvinnor som genomgått könsstympning. Analysen resulterade i tre kategorier:Att ses som äcklig och oren av andra och sakna förklaring,Att andra firar när någon karvat i ens känsligaste delar men själv känna rädsla och förakt, Att leva ett smärtsamt liv utan njutning och i skräck vid menstruation och graviditet. Att sjuksköterskan ökar sinförståelse förkvinnor som har könsstympats för att kunna ge en så god omvårdnad som möjligt samt attsjuksköterskanvid vårdmötenmed dessa kvinnor är uppmärksam på kulturella skillnader som finns mellan Sverige och de länder där förekomst av omskärelsesär vanligtär tvåviktiga aspekter.

  • Silfwerbrand, Christina
    Luleå University of Technology, Department of Engineering Sciences and Mathematics.
    Feasibility study of modelling a virtual climate chamber with CFD2020Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The company tests their industrial tools in a climate chamber to assure that tools meet the ISO-standard requirements and to assure personnel safety. Since it takes time to prepare the physical tool and to get a time slot to test it, this process was a bottleneck. Especially interesting is the temperature testing process, and the question of whether or not the entire tool actually reaches the reference temperature within a time interval has been asked. This is the master thesis project’s core. The time it takes for the entire tool to reach a uniform temperature distribution is called thermal soak time and was unknown at the beginning of the project. The aim was to find the thermal soak time, both for the climate chamber and for a virtual CFD-model of the climate chamber. A simulation model was done in the software Altair HyperMesh and validated with experimental data from the climate chamber on site.

    The result of the experiments of the climate chamber showed the impact of all the unknown parameters and contributed to the feasibility study. Temperature cycles were run in the climate chamber to get thermal soak times for increase runs and decrease runs. This resulted in an understanding of how the climate cham- ber works and its limitations. As for the CFD-model, the simulation model of the climate chamber showed promising results of achieving a thermal soak time for all of the components of the tool. However, there are some limitations to consider when performing simulations in the specified software and with the CFD-model.

    In conclusion, the thermal soak time for the best-case scenario with aluminum is determined to be approxi- mately three minutes whilst, for the worst-case scenario, the same time is inconclusive since the simulation did not reach steady state due to time limitation of the project. However, the feasibility study of the climate chamber is complete, and proof of concept is confirmed for transforming a physical climate chamber into a virtual climate chamber. Further studies need to be executed to achieve a robust CFD-model of a virtual climate chamber.

  • Wallstål, Melinda
    et al.
    Luleå University of Technology, Department of Arts, Communication and Education.
    Palo, Desiree
    Luleå University of Technology, Department of Arts, Communication and Education.
    “Man lägger ihop en massa pusselbitar och så kommer det kanske ett blåmärke “: En kvalitativ studie om pedagogers arbete med barn i omsorgssvikt.2020Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med studien är att erövra kunskap utifrån pedagogers erfarenheter om vad som kan väcka misstanke att ett barn utsätts för omsorgssvikt samt hur arbetet vid en misstanke kan se ut. Våra forskningsfrågor sökte svar på hur pedagoger beskriver att de tar tillvara barns signaler vid misstanke om omsorgssvikt samt hur processen från misstanke om omsorgssvikt till orosanmälan kan se ut. Studien lyfter fram olika former av omsorgssvikt och vilka tecken som är vanligast inom respektive form av omsorgssvikt. Studien redogör även för hur dessa tecken kan visa sig hos barnet. Den teoretiska utgångspunkten för studien var det socialkonstruktionistiska perspektivet som bygger på att kunskap skapas socialt. Som metod valdes en kvalitativ ansats i form av semistrukturerade intervjuer som datainsamlingsmetod. Ljudinspelning och anteckningar användes som dokumentationsverktyg till intervjuerna. För analys och resultat har sedan materialet transkriberats. En kvalitativ analysmetod användes i syfte att hitta olika kategorier som besvarar forskningsfrågorna. Till detta konstruerades en analysmodell utifrån Killéns (2014) överlevnadsstrategier. Resultatet visar att pedagogerna tar vara på barns signaler genom bland annat sociala konstruktioner och dokumentationer samt att processen från att en misstanke väcks till att orosanmälan görs kan se väldigt olika ut beroende på vilken form av omsorgssvikt det kan handla om. Resultatet visar även att pedagogerna omedvetet använder sig av Killéns överlevnadsstrategier när de beskriver sitt arbete med barn som blivit utsatta för omsorgssvikt. Problematiken som uppstår när pedagogerna omsätter dessa strategier i praktiken blir att de blundar för barnets verklighet, vilket kan leda till att anmälan fördröjs eller uteblir.

  • Bui, Dieu Tien
    et al.
    Geographic Information Science Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam. Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Vietnam.
    Shirzadi, Ataollah
    Department of Rangeland and Watershed Management, Faculty of Natural Resources, University of Kurdistan, Sanandaj, Iran.
    Amini, Ata
    Kurdistan Agricultural and Natural Resources Research and Education Center, AREEO, Sanandaj, Iran.
    Shahabi, Himan
    Department of Geomorphology, Faculty of Natural Resources, University of Kurdistan, Sanandaj , Iran. Department of Zrebar Lake Environmental Research, Kurdistan Studies Institute, University of Kurdistan.
    Al-Ansari, Nadhir
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Hamidi, Shahriar
    Department of Water Science and Engineering, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran.
    Singh, Sushant K.
    Department of Health, Insurance & Life Sciences, Data & Analytics, Virtusa Corporation, Irvington, NJ, USA.
    Pham, Binh Thai
    Institute of Research and Development, Duy Tan University, Da Nang, Vietnam.
    Ahmad, Baharin Bin
    Faculty of Built Environment and Surveying, Universiti Teknologi Malaysia (UTM), Johor Bahru, Malaysia.
    Ghazvinei, Pezhman Taherei
    Department of Civil Engineering, Technical and Engineering College, Ale Taha University, Tehran, Iran.
    A Hybrid Intelligence Approach to Enhance the Prediction Accuracy of Local Scour Depth at Complex Bridge Piers2020In: Sustainability, ISSN 2071-1050, E-ISSN 2071-1050, Vol. 12, no 3, p. 1-24, article id 1063Article in journal (Refereed)
    Abstract [en]

    Local scour depth at complex piers (LSCP) cause expensive costs when constructing bridges. In this study, a hybrid artificial intelligence approach of random subspace (RS) meta classifier, based on the reduced error pruning tree (REPTree) base classifier, namely RS-REPTree, was proposed to predict the LSCP. A total of 122 laboratory datasets were used and portioned into training (70%: 85 cases) and validation (30%: 37 cases) datasets for modeling and validation processes, respectively. The statistical metrics such as mean absolute error (MAE), root mean squared error (RMSE), correlation coefficient (R), and Taylor diagram were used to check the goodness-of-fit and performance of the proposed model. The capability of this model was assessed and compared with four state-of-the-art soft-computing benchmark algorithms, including artificial neural network (ANN), support vector machine (SVM), M5P, and REPTree, along with two empirical models, including the Florida Department of Transportation (FDOT) and Hydraulic Engineering Circular No. 18 (HEC-18). The findings showed that machine learning algorithms had the highest goodness-of-fit and prediction accuracy (0.885 < R < 0.945) in comparison to the other models. The results of sensitivity analysis by the proposed model indicated that pile cap location (Y) was a more sensitive factor for LSCP among other factors. The result also depicted that the RS-REPTree ensemble model (R = 0.945) could well enhance the prediction power of the REPTree base classifier (R = 0.885). Therefore, the proposed model can be useful as a promising technique to predict the LSCP.

  • Palm, Emanuel
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
    Bodin, Ulf
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Schelén, Olov
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Approaching Non-Disruptive Distributed Ledger Technologies via the Exchange Network Architecture2020In: IEEE Access, E-ISSN 2169-3536, Vol. 8, p. 12379-12393Article in journal (Refereed)
    Abstract [en]

    The rise of distributed ledger technologies, such as R3 Corda, Hyperledger Fabric and Ethereum, has lead to a surge of interest in digitalizing different forms of contractual cooperation. By allowing for ledgers of collaboration-critical data to be reliably maintained between stakeholders without intermediaries, these solutions might enable unprecedented degrees of automation across organizational boundaries, which could have major implications for supply chain integration, medical journal sharing and many other use cases. However, these technologies tend to break with prevailing business practices by relying on code-as-contracts and distributed consensus algorithms , which can impose disruptive requirements on contract language, cooperation governance and interaction privacy. In this paper, we show how our Exchange Network architecture could be applied to avoid these disruptors. To be able to reason about the adequacy of our architecture, we present six requirements for effective contractual collaboration, which notably includes negotiable terms and effective adjudication . After outlining the architecture and our implementation of it, we describe how the latter meets our requirements by facilitating (1) negotiation, (2) user registries, (3) ownership ledgers and (4) definition sharing, as well as by only replicating ledgers between stakeholder pairs. To show how our approach compares to other solutions, we also consider how Corda, Fabric and Ethereum meet our requirements. We conclude that digital negotiation and ownership could replace many proposed uses of code-as-contracts for better compatibility with current contractual practices, as well as noting that distributed consensus algorithms are not mandatory for digital cooperation.

  • Chapman, David
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Larsson, Agneta
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Climate change and human behaviour: Understanding modal choice in a rapidly urbanising Arctic2020In: Local or Global Arctic?: Multi-scaled considerations of connections and remoteness in climate-impacted communities, 2020Conference paper (Refereed)
    Abstract [en]

    This research explores the human dimension of non-motorised transport, i.e. soft-mobility in Arctic communities. Empirical results are used to show how people’s modal choice in the European Arctic is being influenced by climate evolution and human-made climate change. From these results, it is possible to conceive new visions of the how to design the outside environments of Arctic settlements that can better enable people to move around in Arctic communities with reduced reliance on vehicles. At the societal level, this research will help reduce energy consumption and pollution from transport. For the individual, it highlights social, economic and the health benefits of soft-mobility. This includes creating places that are attractive, safe, and recognisable, as a basis for people’s informed decision-making about outdoor activities and modal choice. Pilot projects are ongoing in Riksgränsen, Björkliden and Abisko (Sweden) with data collected from residents and tourists using citizen science. Outcomes have practical and policy implications for town planning and tourism.

    The project is supported by the ARCTIC FIVE (a partnership of UiT The Arctic University of Norway, Luleå University of Technology, Umeå University, The University of Lapland and The University of Oulu) and Access Abisko 2020-22 (research enabling by the Swedish Polar Research Secretariat).

  • Maligranda, Lech
    et al.
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mathematical Science.
    Ciesielska, Danuta
    Alfred Rosenblatt (1880-1947). Polish-Peruvian mathematician2019In: Banach Center Publications, ISSN 0137-6934, E-ISSN 1730-6299, Vol. 119, p. 57-108Article in journal (Refereed)
    Abstract [en]

    Alfred Rosenblatt (1880-1947) was a Polish mathematician born into a Jewish family in Krakow (Kraków, Poland). He studied in Vienna, Krakow, Göttingen, and worked at the Jagiellonian University in Krakow (1910-1936) and at the University of San Marcos in Lima, Peru (1936-1947). During the Second World War, Rosenblatt accepted Peruvian citizenship. His work was important for the development of mathematics in Peru, including the foundation of the National Academy of Exact Sciences, Physics and Natural Sciences in Lima. He is mentioned among the four mathematicians of the twentieth century most important for Peru (F. Villarreal, G. Garcia Diaz, A. Rosenblatt and J. Tola Pasquel). He spent the first half of 1947 on a scholarship at the Institute for Advanced Study in Princeton and had several lectures at other universities in the USA.

    Rosenblatt published almost three hundred scientific papers in various fields of pure and applied mathematics, including ordinary and partial differential equations, algebraic geometry, theory of analytic functions, probability, mathematical physics, three-body problem, hydrodynamics and other applications of mathematics. About 180 papers were published in the years of his work in Poland and about 120 in the years he worked in Peru. His publications are in Polish, German, French, Italian, Spanish and English. Rosenblatt participated actively in four International Congresses of Mathematicians: Cambridge (1912), Strasbourg (1920), Bologna (1928), Zurich (1932). He presented three talks in Bologna and one in Zurich.

    We describe Alfred Rosenblatt's life and important parts of his work in detail. We have made an effort to see all his papers, so as not to miss any of his achievements in mathematics and applications, including papers and information written in Spanish; e.g., [Ro11], [Ro13]-[Ro16] and [Ro20]. We have already written three articles, two in Polish [Ro8], [Ro9] and one in Russian [Ro12], to introduce him to Polish and Russian mathematicians. Now we want to do the same for a wider range of scientists with this article in English. Some information on Rosenblatt can also be found in [Ro1]-[Ro6], [Ro10] and [Ro17]-[Ro19].

  • Holmqvist, Ida
    Luleå University of Technology, Department of Arts, Communication and Education.
    Med dans som uttrycksform: Hur barn genom dans gestaltar och kommunicerar sina upplevelser av fenomenet årstider2020Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Studiens syfte är att undersöka hur dans kan användas som uttrycksform av barn i förskolan. Det fokus som studien har är barns upplevelser av årstider, hur barnen gestaltar och kommunicerar dessa via dansen. För att genomföra studien och möjliggöra att få svar på forskningsfrågorna utformades ett mindre dansprojekt tillsammans med en barngrupp där jag gick in i rollen som förskollärare. Studien utgår ifrån en kvalitativ metod och de data som har samlats in baseras på deltagande observation, videoobservation och ljudinspelning. Resultatet visar att barnen gestaltar och kommunicerar sina upplevelser av årstider utifrån personliga erfarenheter. De använder kroppens rörelser till att gestalta olika naturfenomen för respektive årstid och dansar årstidstypiska lekar, detta då leken kan ses som en stor del av barns livsvärld.

  • Carl, Jennie
    Luleå University of Technology, Department of Arts, Communication and Education.
    Naturvetenskap och estetiska lärprocesser: En studie om hur naturvetenskap och estetiska lärprocesser integreras i förskolan2020Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med studien är att öka kunskapen om hur förskollärare planerar och genomför undervisning där estetiska lärprocesser integreras med naturvetenskap. Utifrån syftet har tre forskningsfrågor skapats för att ta reda på förskollärarnas avsikter med en aktivitet där de ska integrera de två ämnena, hur de iscensätter undervisningen samt vilka reflektioner förskollärarna ger uttryck för efter undervisningssituationen.

    Forskningsfrågorna har besvarats genom att använda en kombination av tre metoder. Observation, intervju och stimulated recall gjorde det möjligt att synliggöra förskollärarnas avsikter när de planerade inför aktiviteten där de skulle integrera estetiska lärprocesser och naturvetenskap, vad som skedde i praktiken samt deras reflektioner om det.

    Resultatet visar att estetiska lärprocesser och naturvetenskap ingår i hela processen från planering till genomförande och reflektion. Resultatet tyder dock på att ämnena endast integreras med varandra under genomförandet. Estetiska lärprocesser och naturvetenskap får även olika stort utrymme, både i relation till varandra och beroende på vilken del av processen som studeras.

    Förskollärares förhållningssätt till estetiska lärprocesser och deras kunskaper, eller bristande kunskaper, om de två ämnena påverkar hur undervisningen inom dem sker. Det påverkar vilket innehåll och material förskollärarna väljer att arbeta med, vilket tillvägagångssätt som används och hur de arbetar med barnen.

  • Kokkinen, Heli
    Luleå University of Technology, Department of Arts, Communication and Education.
    Regnbågsfamiljer i förskolan: En kvalitativ studie om hur regnbågsfamiljer konstrueras i förskolan2020Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The aim of this study was to find out how preschool teachers construct LGBTQ families in preschool and what norms of family emerge from preschool teachers´ stories. The study rests on the social constructionist perspective where qualitative interviews were conducted to answer the study´s purpose and questions. The result show that LGBTQ children are excluded in preschool if LGBTQ families are not included and made visible. In a wider perspective this may mean that LBGTQ children in preschool suffer from socially alienation if they do not get their family construction confirmed in preschool. Despite this, the results show a clear norm of heteronormativity in preschool teachers´ stories