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  • Bergman, Liza-Marie
    et al.
    Luleå University of Technology, Department of Health Sciences.
    Edman, Ida
    Luleå University of Technology, Department of Health Sciences.
    Distriktssköterskors erfarenheter av samarbete med patientansvarig läkare vid palliativ vård i hemmet2019Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Många gånger är det distriktssköterskor som står patienter närmast och är patienternas talesperson men det krävs ett multiprofessionellt samarbete för att kunna se till alla behov och skapa förutsättningar för patienter att uppleva livskvalitet sista tiden i livet. Då fler väljer att dö hemma är det centralt att samarbetet mellan distriktssköterskor och patientansvarig läkare fungerar för att kunna erbjuda god vård. Syftet med denna studie var att beskriva distriktssköterskors erfarenheter av samarbete med patientansvarig läkare vid palliativ vård i hemmet. Distriktssköterskor med minst ett års erfarenhet inom palliativ vård i hemsjukvården deltog i studien. Datainsamling utfördes med semistrukturerade intervjuer av åtta distriktssköterskor och data analyserades med hjälp av kvalitativ innehållsanalys. Dataanalysen resulterade i fyra subteman: Frustrerande att behöva strida för samarbete; Kontinuiteten är bristande; Tidigt engagemang från läkare ger bättre vård samt Att tillsammans ligga steget före. Det övergripande temat var Att sträva efter bättre tillgänglighet av läkare för en trygg vård. Distriktssköterskor beskrev att läkare inte prioriterade palliativ vård i samma utsträckning som dem samt att det var brist på patientansvariga läkare. Individuella samt organisatoriska faktorer ligger till grund för kvaliteten på samarbetet och därmed också möjligheten att kunna erbjuda palliativa patienter en god och säker vård.

  • Nahar, Nazmun
    et al.
    BGC Trust University Bangladesh, Bidyanagar, Chandanaish, Bangladesh.
    Ara, Ferdous
    Department of Computer Science and Engineering, BGC Trust University, Bangladesh.
    Neloy, Md. Arif Istiek
    Department of Computer Science and Engineering, BGC Trust University, Bangladesh.
    Barua, Vicky
    Department of Computer Science and Engineering, BGC Trust University, Bangladesh.
    Hossain, Mohammad Shahadat
    University of Chittagong, Bangladesh.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    A Comparative Analysis of the Ensemble Method for Liver Disease Prediction2019In: Proceedings of International Conference on Innovation in Engineering and Technology (ICIET), 2019Conference paper (Refereed)
    Abstract [en]

    Early diagnosis of liver disease is very important in order to save human lives and take appropriate measure to control the disease. In several fields, especially in the field of medical science, the ensemble method was successfully applied. This research work uses different ensemble methods to investigate the early detection of liver disease. The selected dataset for this analysis is made up of attributes such as total bilirubin, direct bilirubin, age, sex, total protein, albumin, and globulin ratio. This research mainly aims at measuring and comparing the efficiency of different ensemble methods. AdaBoost, LogitBoost, BeggRep, BeggJ48 and Random Forest are the ensemble method used in this research. The study shows that LogitBoost is the most accurate model than other ensemble approaches.

  • Jaunky, Vishal Chandr
    et al.
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences, Social Sciences.
    Jeetoo, Jamiil
    Department of Economics and StatisticsUniversity of Mauritius, Reduit, Mauritius.
    Rampersad, Shreya
    Department of Economics and StatisticsUniversity of Mauritius, Reduit, Mauritius.
    Happiness and Consumption in Mauritius: An Exploratory Study of Socio-Economic Dimensions, Basic Needs, Luxuries and Personality Traits2019In: Journal of Happiness Studies, ISSN 1389-4978, E-ISSN 1573-7780Article in journal (Refereed)
    Abstract [en]

    Mainstream economics perceive an individual as highly individualistic, presuming that he/she consumes goods in the most efficient way to optimize his/her level of happiness. This study attempts to explore the nexus between socio-economic dimensions, basic needs, luxuries and personality traits and happiness in Mauritius. Material consumption and happiness are projected to be positively and strongly related. This is usually illuminated in terms of the increased possibilities to satisfy basic needs and luxuries along with other motives which additional spending provides. Other instrumental aspects of consumption, such as its relative, community-based and hedonic magnitudes are accounted. Cross-sectional data are compiled from a household survey with a sample size of 1015 observations. To conduct the analysis, an ordered probit model is applied. The general conclusion is drawn upon the results that socio-economic indicators like educational attainment, residential location, family size, income in addition to the intermediate needs deprivation index, brand consciousness, fashion innovativeness, commercial interest, shopping enjoyment, hedonism, bandwagon effect and personality traits are significantly related to people’s happiness.

  • Boström, Margareta
    Luleå University of Technology, Department of Arts, Communication and Education.
    Fritidshemmets lärmiljöer: Fritidshemmets lärmiljöer ur specialpedagogiskt perspektiv2019Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Abstrakt Syftet med studien var att belysa fritidshemmets lärmiljöer med focus på hur specialpedagogiskt perspektiv kommer till uttryck i mötet med den fysiska och den sociala lärmiljön. Den fysiska och den sociala lärmiljön observerades på ett fritidshem. Det relationella specialpedagogiska perspektiv var det perspektiv som framträdde tydligast i relation till den sociala och fysiska lärmiljön. Det kategoriska perspektivet kan bli en konsekvens av organisationens bemanningspolitik och elevgruppernas storlek. Det kategoriska perspektivet kan även framträda i den visuellt tillgängliga fysiska lärmiljön. Dilemmaperspektivet blir synligt när gruppen delas och gruppen befinner sig i utemiljön. En del av resultatet i den här kvalitativa studien är att tiden är en styrande ramfaktor under en dag i fritidshemmet. En annan sak som framkom var att organisationens bemanning kan vara ett hinder till att alla elever får det stöd de behöver för att kunna vara delaktiga i aktiviteterna som fritidshemmet erbjuder till att uppnå läroplanens mål.

  • Pettersson, Fredrik
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Optimizing Deep Neural Networks for Classification of Short Texts2019Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This master's thesis investigates how a state-of-the-art (SOTA) deep neural network (NN) model can be created for a specific natural language processing (NLP) dataset, the effects of using different dimensionality reduction techniques on common pre-trained word embeddings and how well this model generalize on a secondary dataset. The research is motivated by two factors. One is that the construction of a machine learning (ML) text classification (TC) model is typically done around a specific dataset and often requires a lot of manual intervention. It's therefore hard to know exactly what procedures to implement for a specific dataset and how the result will be affected. The other reason is that, if the dimensionality of pre-trained embedding vectors can be lowered without losing accuracy, and thus saving execution time, other techniques can be used during the time saved to achieve even higher accuracy.

    A handful of deep neural network architectures are used, namely a convolutional neural network (CNN), long short-term memory neural network (LSTM) and a bidirectional LSTM (Bi-LSTM) architecture. These deep neural network architectures are combined with four different word embeddings: GoogleNews-vectors-negative300, glove.840B.300d, paragram_300_sl999 and wiki-news-300d-1M.

    Three main experiments are conducted in this thesis. In the first experiment, a top-performing TC model is created for a recent NLP competition held at Kaggle.com. Each implemented procedure is benchmarked on how the accuracy and execution time of the model is affected. In the second experiment, principal component analysis (PCA) and random projection (RP) are applied to the pre-trained word embeddings used in the top-performing model to investigate how the accuracy and execution time is affected when creating lower-dimensional embedding vectors. In the third experiment, the same model is benchmarked on a separate dataset (Sentiment140) to investigate how well it generalizes on other data and how each implemented procedure affects the accuracy compared to on the original dataset.

    The first experiment results in a bidirectional LSTM model and a combination of the three embeddings: glove, paragram and wiki-news concatenated together. The model is able to give predictions with an F1 score of 71% which is good enough to reach 9th place out of 1,401 participating teams in the competition. In the second experiment, the execution time is improved by 13%, by using PCA, while lowering the dimensionality of the embeddings by 66% and only losing half a percent of F1 accuracy. RP gave a constant accuracy of 66-67% regardless of the projected dimensions compared to over 70% when using PCA. In the third experiment, the model gained around 12% accuracy from the initial to the final benchmarks, compared to 19% on the competition dataset. The best-achieved accuracy on the Sentiment140 dataset is 86% and thus higher than the 71% achieved on the Quora dataset.

  • Paniagua, Cristina
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
    Eliasson, Jens
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
    Delsing, Jerker
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
    Efficient Device-to-Device Service Invocation Using Arrowhead Orchestration2019In: IEEE Internet of Things Journal, ISSN 2327-4662Article in journal (Refereed)
    Abstract [en]

    The Internet of Things (IoT) enables interaction from real-world physical objects using sensors to the virtual world of computers and the Internet. The use of service-oriented architecture (SOA) is one step in the creation of basic and complex interactions between several sensors and actuators. However, the use of SOA-enabled technologies alone does not meet all requirements of how sensor and actuator systems could be integrated to create distributed monitoring and control applications. The centralized, traditional method of communication in wireless sensor networks via a gateway presents drawbacks that have to be addressed; device-to-cloud communication adds higher latency and higher power consumption and is less robust than the device-to-device communication approach. Moreover, all these characteristics reduce the scalability of the network, thus limiting the use of IoT in the industry. In this paper, the proposed method utilizes the Arrowhead framework orchestration system to generate service composition within a (wireless) network formed by IoT devices. The aim is to achieve efficient device-to-device service invocation to reduce the drawbacks of today's widely used device-to-cloud approach. The method in this paper performs efficient service composition for industrial IoT, including mapping SOA service composition in very small resource-constrained devices using the Arrowhead orchestration. The results presented in this paper at the service level can increase performance and robustness in fog computing on resource-constrained devices.

  • Westberg, Erik (Conductor)
    Luleå University of Technology, Department of Arts, Communication and Education, Music, media and Theatre.
    The Cloud of Unknowing2019Artistic output (Unrefereed)
  • Westberg, Erik (Conductor)
    Luleå University of Technology, Department of Arts, Communication and Education, Music, media and Theatre.
    POESIS: Bohuslän Big Band under ledning av Örjan Fahlström. Varbergs kammarkör samt sångare ur Erik Westbergs Vokalensemble under ledning av ErikWestberg.2019Artistic output (Unrefereed)
  • Soleimanmeigouni, Iman
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Ahmadi, Alireza
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Khajehei, Hamid
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Nissen, Arne
    Trafikverket, Luleå, Sverige.
    Investigation of the effect of the inspection intervals on the track geometry condition2019In: Structure and Infrastructure Engineering, ISSN 1573-2479, E-ISSN 1744-8980Article in journal (Refereed)
    Abstract [en]

    In order to evaluate the railway track geometry condition and plan maintenance activities, track inspection cars run over the track at specific times to monitor it and record geometry measurements. Applying an adequate inspection interval is vital to ensure the availability, safety and quality of the railway track, at the lowest possible cost. The aim of this study has been to investigate the effect of different inspection intervals on the track geometry condition. To achieve this, an integrated statistical model was developed to predict the track geometry condition given different inspection intervals. In order to model the evolution of the track geometry condition, a piecewise exponential model was used which considers break points at the maintenance times. Ordinal logistic regression was applied to model the probability of the occurrence of severe isolated defects. The Monte Carlo technique was used to simulate the track geometry behaviour given different inspection intervals. The results of the proposed model support the decision-making process regarding the selection of the most adequate inspection interval. The applicability of the model was tested in a case study on the Main Western Line in Sweden.

  • Wikström, Catarina
    et al.
    Luleå University of Technology, Department of Health Sciences.
    Lennestål, Ewa
    Luleå University of Technology, Department of Health Sciences.
    Sjuksköterskors upplevelser av svårigheter vid palliativ vård i hemmet2019Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Bakgrund: Hemsjukvården ökar och allt fler palliativa patienter vårdas i hemmen. Det ställer stora krav och planering av sjuksköterskan i hemsjukvården för att få allt att fungera i det palliativa skedet då patienten är extra utsatt. Syftet är att beskriva sjuksköterskors upplevelser av svårigheter vid palliativ vård i hemmet. Metod: En kvalitativ studie med semistrukturerade intervjuer med åtta sjuksköterskor. Data analyserades med en kvalitativ innehållsanalys som resulterade i fyra kategorier och ett tema. Resultat: Kategorierna var; Främja trygga relationer för alla, vilket sjuksköterskorna betonade som en svårighet, och som fick stor betydelse för omvårdnaden och acceptans av situationen. Samverkan och kommunikation, skapade svårigheter att ge en god omvårdnad. Hänsyn till behov och önskemål, upplevde sjuksköterskorna var svårt när mångas behov ställdes mot varandra. Med Hemmet som arbetsplats, ansåg sjuksköterskorna att det var svårt att ge en säker och hänsynsfull omvårdnad. Den övergripande tematiseringen resulterade i begreppet; ”Att balansera på slak lina”. Slutsats: Sjuksköterskor i palliativ hemsjukvård upplever många svårigheter i sitt dagliga arbete. Resultatet av denna studie visar att det finns stor osäkerhet i hur den enskilda sjuksköterskan ska hantera detta.

  • Winnberg, Anton
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    Waterproof packing for urban outdoor: Development of two waterproof backpacks intended for daily bike commute, urban strolls and travel2019Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Everyday, lots of people use some sort of bag to carry their daily equipment around, whether it is between home and work or any typ of spare time activity. This report covers a Master Thesis project in Industrial Design Engineering at Luleå University of Technology. The thesis concerns the development of two waterproof backpacks. These backpacks are developed in collaboration with the outdoor brand Lundhags, and intended for everyday bike commute, urban excursion and travel. Behind the initiative lies the desire of expanding the company’s product portfolio with a set of new waterproof daypacks within the category of urban outdoor. Also, to offer the customers the better protection of electronic devices such as laptops, surf tablets and smartphones, which are products that are prominent in our daily lives. 

    The project has followed a schedule and workflow influenced by versions of the design thinking process, with multiple iterations along the way. The work started off by studying competing products on the market, research and conduct knowledge on relevant topics through a literature review, study users needs and gather inspiration. User studies where carried out as interviews with both users and retailers, where the result was summarised as personas to represent the target audience. The contextual studies laid the foundation for the rest of the project, which further shifted towards more practical activities. Such as ideation sketching, building textile and paper mock-ups, concept development and concept evaluation. The result of this thesis project was the first version technical drawings for two backpack concepts. During the final weeks, these drawings were sent to the manufacturer for production of first version prototypes and production cost proposal. The bags are planned as a 16 liter and a 22 liter, where they offer internal options of organising the packing, as well external access pockets for smaller items to be close at hand.

  • Biswas, Munmun
    et al.
    Department of Computer Science and Engineering, BGC Trust University Bangladesh, Bidyanagar, Chandanaish, Bangladesh.
    Chowdury, Mohammad Salah Uddin
    BGC Trust University Bangladesh, Chandanaish, Chittagong-4381, Bangladesh.
    Nahar, Nazmun
    University of Chittagong, Bangladesh.
    Hossain, Mohammad Shahadat
    University of Chittagong, Bangladesh.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    A Belief Rule Base Expert System for staging Non-Small Cell Lung Cancer under Uncertainty2019In: Proceedings of 2019 IEEE International Conference on Biomedical Engineering, Computer and Information Technology for Health (BECITHCON), 2019Conference paper (Refereed)
    Abstract [en]

    Non small cell Lung cancer (NSCLC) is one of the most well-known types of Lung cancer which is reason for cancer related demise in Bangladesh. The early detection stage of NSCLC is required for improving the survival rate by taking proper decision for surgery and radiotherapy. The most common factors for staging NSCLC are age, tumor size, lymph node distance, Metastasis and Co morbidity. Moreover, physicians’ diagnosis is unable to give more reliable outcome due to some uncertainty such as ignorance, incompleteness, vagueness, randomness, imprecision. Belief Rule Base Expert System (BRBES) is fit to deal with above mentioned uncertainty by applying both Belief Rule base and Evidential Reasoning approach .Therefore, this paper represents the architecture, development and interface for staging NSCLC by incorporating belief rule base as well as evidential reasoning with the capability of handling uncertainty. At last, a comparative analysis is added which indicate that the outcomes of proposed expert system is more reliable and efficient than the outcomes generated from traditional human expert as well as Support Vector Machine (SVM) or Fuzzy Rule Base Expert System (FRBES).

  • Holmbom, Lina
    et al.
    Luleå University of Technology, Department of Health Sciences.
    Jonsson, Sofia
    Luleå University of Technology, Department of Health Sciences.
    Fysisk aktivitet och välbefinnande hos elever i årskurs nio – En kvantitativ tvärsnittsstudie2019Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Bakgrund: Fysisk inaktivitet är ett globalt hälsoproblem och världshälsoorganisationen, WHO, har beräknat att 81% av världens barn och ungdomar i åldern 5–17 år inte är tillräckligt fysisk aktiva. Specifikt gällande barn och ungdomar har fysisk aktivitet många positiva effekter. Dessa kan ses både på lång och kort sikt. Fysisk aktivitet har visat sig bidra till psykisk hälsa och en bättre upplevd livskvalitet. Syfte: Syftet med denna studie var att undersöka sambandet mellan fysisk aktivitet och välbefinnande hos elever i årskurs nio. Design och metod: Studien utfördes genom en kvantitativ tvärsnittsstudie i form av pappersenkäter. Resultatet från enkäterna analyserades med kvantitativ metod. Resultat: Enkätstudien visar att pojkar har skattat ett högre välbefinnande änflickor och annan. Det gick inte att se ett signifikant samband mellan vardagsmotion och skattat välbefinnande. Gällande den fysiska träningen och det skattade välbefinnandet kunde ett statistiskt samband påvisas. Även vid sammanslagning av den skattade fysiska träningen samt vardagsmotionen kunde ett signifikant samband ses. Slutsats: Det är viktigt att uppmuntra elever till fysisk aktivitet samt att arbeta för att stärka deras self-efficacy, självförmåga för ett ökat välbefinnande.

  • Andersson, Josefine
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Hur kan en befintlig centrumnära galleria omformas för att bidra till en mer attraktiv och hållbar stad?: En studie av Odenhuset i Trollhättan2019Independent thesis Advanced level (professional degree), 300 HE creditsStudent thesis
    Abstract [en]

    During 1960 and 1970, several Domus department stores opened in the city centres of Sweden. By car, both local and long distance visitors could visit the Domus department store. As the external shopping centres and electronic commerce appeared, the number of visitors to the city malls (previously Domus department stores) has decreased. Nowadays, it is common for trade business to be forced to close the business because of the competition from external shopping centres and electronic commerce. This results in the fact that empty rooms nowadays are commonly found in city mall buildings. With the empty spaces, the city mall buildings have a limited range of goods and services. Less visitors to the city mall buildings result in less visitors to the place next to the city mall building, but also less visitors to the entire city centre.The purpose of this master thesis is to contribute with increased knowledge of how the existing city mall buildings can be redesigned as an idea and in its design. This because it is necessary to meet today’s challenges how the city mall buildings can contribute to a better sustainable and an attractive urban environment. The aim of this master thesis is to find a new design and function for Odenhuset in Trollhättan. The result should also be able to apply for similar existing city malls in central urban environments.The study was conducted by using the method called Research by Design. The method contains the three phases: pre-studies, design process and design analysis. Through Research by Design, it is possible to create a design proposal for the new function of the building where the proposal is based on scientific pre-studies. The first phase pre-studies includes site visits and literature studies. The city mall buildings that were visited for thestudy are either in the leading edge of Mixed Use or does the visited city mall building has many empty premises in the building.The conclusion of this master thesis is to find a new function for a centreclose city mall building, it is essential to accept the trade development. How trade has developed and changed is based on what human needs has looked like. Since external shopping malls and electronic commerce meetpeople nowadays needs better than the city malls does, the competition for customers has arisen. The result of the design proposal is therefore flexible and adaptable in order to make the city mall buildings once againbe able to meet new and future human needs. The design proposal and the new function of the city mall building should conveniently include different activities available for everyone. To combine different activities creates a wider range for the place. A wider range makes better conditions for the building to get more visitors and movement around the place.The design proposal gives space in the city mall building for activities thatmakes people’s everyday lives work better.

  • Arapantonis, Elpidoforos
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering.
    Data tampering in Vehicle CAN Bus networks2019Independent thesis Advanced level (degree of Master (Two Years)), 80 credits / 120 HE creditsStudent thesis
    Abstract [en]

    The paradigm of the automotive industry has changed, over the course of the last10-15 years. Electronics and software, have introduced in many dierents parts ofa vehicle and the drive-by-wire it is taking over the vehicle functions. Connectivityfunctionalities are increasing in the context of the automotive industry as well. Allthe aforementioned parts have more than one common link. This thesis project willfocus on one of these links, which is the security. The focus will be the CAN busprotocol and specically, on investigating the implications of an adversary havingphysical access in a vehicle. An experiment will be contucted as part of this thesiswork, by using open source hardware (Arduino and Raspberry Pi) and a Man-inthe-middle (MITM) attack scenario, will be implemented. The application, whichwill perform the MITM attack (small scale CAN bus fuzzer) will be developedduring this project and it will be distributed as an open source software afterwards.

  • Betancourt Payán, Andrés Felipe
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Towards the Performance Assessment of aMapdrift Autofocus for a P-Band SARMission Implementation2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In the context of the ESA BIOMASS mission in which for the first time, a P-Band SAR sensor isgoing to be mounted into a spaceborne system. With its penetration capability, it will contributeto the measurement of the biomass and carbon content in the Earth’s forests. An autofocusalgorithm is needed for the correction of phase errors introduced by the changing diffraction indexin the ionosphere. Because of the quickly changing nature of the ionosphere, defocusing has to bemeasured and corrected locally over several sections of a SAR capture.In this thesis, a deep introduction into phase errors is made having in mind that the ionosphereis expected to introduce time varying low frequency errors that can be constructed as a series ofquadratic curves. These quadratic phase errors introduce defocusing that is seen as blur and lossof contrast. An algorithm is proposed and tested for measuring this defocusing, while its strengthsand weaknesses are discussed.The idea of measuring defocusing is to try to recover the temporal phase function that introduceddefocusing in the first place. Here a method to recover this temporal phase function is introduced,and a thorough performance assessment of this retrieval is carried out. The variables involved thequality and reliability of this retrieval are studied one by one.

  • Björk, Siv Larsgren
    Luleå University of Technology, Department of Arts, Communication and Education, Education, Language, and Teaching.
    Tal i bråkformat: en analys av läromedel i matematik i årskurs sex2019Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
  • Viklund, Malin
    Luleå University of Technology, Department of Arts, Communication and Education.
    BYGGA kunskap: Ett praktiknära forskningsprojekt om hur lässtrategier kan inkluderas i undervisning i yrkesämnen på gymnasiet och vilka förutsättningar det skapar för eleverna2019Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of the action research project was to understand how the teacher can combine vocational knowledge and include aspects of reading and see what interactions it creates in the classroom. Furthermore, how the teacher's linguistic support was made visible in the students' own texts and in the students' thoughts about the teaching based on focus group interviews is analyzed. Participants in the study consisted of pupils in the upper secondary school who studied the specialization Community building and the Environment at the Technology program. The students are not always aware of which strategies they use when reading a factual text. The result, however, shows that students who have received vocational teaching that include reading strategies have a greater familiarity with the subject’s content and subject-specific concepts. The teacher's work on including reading created interactions that sparked student engagement and gave the students more opportunities to deliberately choose a strategy when reading a factual text.

  • Bergman, Åsa
    et al.
    Luleå University of Technology, Department of Health Sciences, Nursing Care.
    Warnström, Ivy
    Luleå University of Technology, Department of Health Sciences, Nursing Care.
    Faktorer av betydelse för patientsäker kommunikation vid telefonrådgivning på hälsocentraler: distriktssköterskors och sjuksköterskors perspektiv2019Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Abstrakt

    Telefonrådgivning är ett snabbt växande område som involverar allt fler sjuksköterskor och distriktssköterskor. Särskilt på hälsocentraler är telefonrådgivning ett nytt och allt mer omfattande arbetsmoment. En god kommunikation mellan sjuksköterska och patient kan förstärka patientsäkerheten vid telefonrådgivning. Syftet med studien var att undersöka faktorer av betydelse för patientsäker kommunikation vid telefonrådgivning på hälsocentraler utifrån distriktssköterskors och sjuksköterskors perspektiv. Metoden som använts är en tvärsnittsstudie, där en frågeenkät skickades ut via mail med länk till Google forms, till 70 distriktssköterskor och sjuksköterskor som arbetar på hälsocentraler i Norrbotten. Av de 70 enkäter som skickades ut besvarades 51, vilket gav en svarsfrekvens på 72,9%. Resultat visade att utbildning i telefonrådgivning gör att upplevelsen av stress minskar, distriktssköterskor och sjuksköterskor värderar erfarenhet som en av de viktigaste faktorerna för patientsäker kommunikation. Datoriserat beslutstöd, kunskap om samtalsprocessen, systematisk utveckling av samtal samt uppföljning och utvärdering av egna råd är andra faktorer av betydelse för patientsäker kommunikation. Slutsatser är att patientsäker kommunikation vid telefonrådgivning nås genom regelbunden utbildning och utveckling i kommunikationsfärdigheter samt tillgång till rätt stöd.

  • Karlsson, Linda
    et al.
    Luleå University of Technology, Department of Health Sciences, Nursing Care.
    Lindberg, Anna
    Luleå University of Technology, Department of Health Sciences, Nursing Care.
    Sjuksköterskors upplevelser av att arbeta med Lifecare samordnad planering inom primärvård: En fokusgruppsstudie2019Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Lifecare samordnad planering är ett IT-stöd som har till ändamål att upprätta en oavbruten vård- och omsorgskedja mellan vårdaktörer och därigenom främja personcentrerad vård, stärka vårdkvalité och effektivisera vårdverksamhet. Syftet med studien var att beskriva sjuksköterskors upplevelser av att arbeta med Lifecare samordnad planering inom primärvård. Fokusgruppsstudien har en kvalitativ forskningsmetod där datainsamling genomfördes genom två fokusgruppsintervjuer med totalt åtta deltagare varav fyra deltagare i varje grupp. Studiens deltagare utgjordes av fyra sjuksköterskor och fyra distriktssköterskor som arbetade på två hälsocentraler inom Region Norrbotten. Intervjuerna analyserades med kvalitativ innehållsanalys som utfördes induktivt med en manifest ansats. Resultatet visade att samordningsansvaret innebar ett stort ansvar, att samverka med andra vårdaktörer och att samordna för patienter som primärvården inte var behandlingsansvariga för kunde vara svårt. Det upplevdes en brist på kunskap hos andra vårdaktörer vilket bidrog till merarbete. Samordningsansvaret och arbetet med Lifecare innebar en stor omställning som var både stressig och tidskrävande. Mer tid ägnades åt Lifecare än vad hälsocentralen fick betalt för och det var många som arbetade övertid. Lifecare som IT-stöd upplevdes obearbetat vilket försvårade det dagliga arbetet. Slutligen visade resultatet att för en lyckad samordning som skapade patienttrygghet krävdes ett gott samarbete mellan olika vårdaktörer och med delaktighet från patienten. Konklusionen är att arbetet med Lifecare samordnad planering behöver förbättras.

  • Gupta, Dipankar
    et al.
    Department of Computer Science and Engineering, Port City International University, Chattogram, Bangladesh.
    Hossain, Emam
    Department of Computer Science and Engineering, University of Chittagong, Chattogram, Bangladesh.
    Hossain, Mohammad Shahadat
    University of Chittagong, Bangladesh.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Hossain, Sazzad
    Department of Computer Science and Engineering, University of Liberal Arts Bangladesh, Dhaka, Bangladesh.
    A Digital Personal Assistant using Bangla Voice Command Recognition and Face Detection2019In: Proceedings of IEEE International Conference on Robotics, Automation, Artificial-Intelligence and Internet-of-Things 2019, 2019Conference paper (Refereed)
    Abstract [en]

    Though speech recognition has been a common interest of researchers over the last couple of decades, but very few works have been done on Bangla voice recognition. In this research, we developed a digital personal assistant for handicapped people which recognizes continuous Bangla voice commands. We employed the cross-correlation technique which compares the energy of Bangla voice commands with prerecorded reference signals. After recognizing a Bangla command, it executes a task specified by that command. Mouse cursor can also be controlled using the facial movement of a user. We validated our model in three different environments (noisy, moderate and noiseless) so that the model can act naturally. We also compared our proposed model with a combined model of MFCC & DTW, and another model which combines crosscorrelation with LPC. Results indicate that the proposed model achieves a huge accuracy and smaller response time comparing to the other two techniques.

  • Emmersköld, Fredrik
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering.
    Wireless Site Survey Analysis Best Western Hotels Malmia2019Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
  • Näslund, Agnes
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    Vilka effekter har jämförelsesidor givit för konkurrensen på bolånemarknaden: Nationalekonomisk kandidatuppsats2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    After the financial crisis, several comparison websites have emerged for private lenders to enable comparison on mortgage terms. The idea behind the comparison pages is that they should be used by the private borrower. On June 1, 2015, a new directive emerged from the Swedish Financial Supervisory Authority to the credit institutes that instead of the list interest, the average interest rate that the lenders offer their customers should be the one published, in order to further increase the transparency of the price. The purpose of this study is to investigate whether competition in the mortgage market has improved after the introduction of the comparison websites and the effects of the increased price transparency. In order to investigate the competition on the mortgage market, the theory of market forms and the Herfindahl-Hirschman Index has been applied. The result of the study shows that the concentration of competition has increased over time. This study also shows that the comparison pages have contributed to increased price transparency that has contributed to consumers information about the market. This study is limited to the Swedish mortgage market. 

  • Högström, Karl
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    Spontant organiserade frivilliga i samverkan: en studie om en spontanfrivillighetsinsats för att underlätta vid brandbekämpning i skogarna kring Kårböle och Färila i Ljusdals kommun sommaren 20182019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Denna uppsats fokuserar på att undersöka en situation som inte hör till vardagen, hur spontanfrivilliga arbetat, agerat och knutit band med varandra vid en katastrofsituation. Att berätta deras historia och med sociologiska glasögon se på hur detta utvecklade sig. Det hela utspelar sig sommaren 2018 i skogarna utanför Färila i Ljusdals kommun i Gävleborgs län och handlar om en grupp människor, spontanfrivilliga, som tar egna initiativ och skapar en omfattande apparat med funktioner som ett mellanstort företag på bara några dagar, för att understödja brandmän och andra vid den näst största skogsbranden i Sverige i modern tid. Sociologen Robert D. Putnam (2006, ss. 121-122) skriver i sin bok Den ensamme bowlaren att ”det sociala kapitalet är knutet till nätverk av samhörighet – man arbetar tillsammans”. Putnam betonar vikten av närsamhället och dess roll när det kommer till det sociala engagemanget. Interaktionen mellan människor. Åtta respondenter har intervjuats, varav sex spontanfrivilliga, en brandvärnsman och en hemvärnsman. Dessa har fått berätta om sina upplevelser och hur de sett på det som hänt. Detta har resulterat i en narrativ analys av deras berättelser. Dessa har sedan analyserats med hjälp av teorier kring närsamhälle, attribution och interaktionsritualer. Den teoretiska delen avhandlar närsamhällets inverkan på det sociala engagemanget, attributionsteorins fokus på tolkning av varför någon gör som den gör och slutligen interaktionsritualer – de mikrohändelser som skapar emotionell energi. Resultatet visar på en samlad bild av hur resultatfokuserade, sammansvetsade och energiska alla de människorna var, som spontant ställde upp för att hjälpa till att bekämpa elden på det sätt de kunde, genom att vara behjälpliga i bakgrunden. Man kan, utifrån resultatanalysens konklusion, diskutera frågor som handlar om hembygd, känslor, gemenskap och nätverkande. Här ser vi kraften, viljan och energin i det som det gemensamma målet klarar av att åstadkomma.

  • Tole, Ilda
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
    Habermehl-Cwirzen, Karin
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
    Cwirzen, Andrzej
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
    Optimization of the Process Parameters Controlling the Degree of Amorphization during Mechanical Activation of Clay Using the Taguchi Method2019In: 1st International Conference on  Smart Materials for Sustainable Construction—SMASCO 2019, Luleå, Sweden, 10–12 December 2019, Proceedings, 2019, Vol. 34Conference paper (Refereed)
    Abstract [en]

    Mechanical activation in a planetary ball mill (BM) is an environmentally friendly process able to enhance the chemical and pozzolanic activity of natural clays. Those materials can be used as supplementary cementitious materials (SCMs) to partially replace Portland cement in concrete. The process parameters of the BM are directly related to the degree of amorphization and thus to the enhancement of the chemical activity. Design of experiments (DOE) is a well-known statistical tool, which can assist in selecting optimized conditions and in obtaining systematic data. However, full factorial design requires a large number of experiment. Taguchi method is based on the use of an Orthogonal Array (OA) to evaluate optimization of the selected factors but with less required experiments. In this study, three factors, each on 2 levels, were selected: ball to powder ratio (B/P) with level 3 and 25, time of grinding with level 5 and 20, and water to powder ratio (W/P) with level 0 and 1. The degree of amorphization (DOA) was selected as the main response for the Taguchi method. DOA was calculated as the ratio between the integral intensities of the main peak of the kaolinite [001] before and after grinding. For dry grinding, the predicted optimized value of DOA complied with the experimental results. Maximized DOA value was achieved for B/P equal to 25 and the grinding duration of 20. This method can be a valuable tool to predict the amorphization degree of minerals present in the natural clay, leading to the optimization of the mechanical activation process.

  • Öhman, May-Britt
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences, Social Sciences. Royal Institute of Technology, KTH.
    Taming Exotic Beauties: Swedish Hydro Power Constructions in Tanzania in the Era of Development Assistance, 1960s - 1990s2007Doctoral thesis, monograph (Other academic)
    Abstract [en]

    This study analyses the history of a large hydroelectric scheme – the Great Ruaha power project in Tanzania. The objective is to establish why and how this specific scheme came about, and as part of this to identify the key actors involved in the decision-making process, including the ideological contexts within which they acted. Although the Tanzanian actors and the World Bank (IBRD) are discussed, main focus is on the Swedish actors on project level.Kidatu, the first phase of the Great Ruaha power project (constructed between1970-1975), became the first large-scale hydropower station in Tanzania. As such, it paved the way for Tanzanian entrance into the Big Dam Era and significant changes within the Tanzanian landscape. As well as the dry river bed at Kidatu, and the small reservoir that precedes it, the Great Ruaha power project also involved the creation of a huge artificial lake, the Mtera reservoir. The Kidatu hydropower station was the first large undertaking within Swedish bilateral aid, and implied the takeover of control of hydropower construction in Tanzania by Swedish enterprises, replacing the enterprises of the former colonial power. A hydropower plant is a complex technoscientific artefact. The construction of a hydropower plant is preceded by a large number of technological choices, scientific prestudies and estimations of costs and revenues. A hydropower plant is also a complex social creation, and is as such filled with social actors engaged in conflicts, compromises and power structures. The decision to construct Kidatu hydropower station was a result of negotiations and activities within what is called “development assistance”. This brings in yet another dimension, the political one, involving export and import of technology, foreign capital, and foreign influence in decision-making processes, as well as ideas about how to bring development and progress to a people supposed to be living in “poverty and misery”. The study is divided into three main parts. The first part analyses the context of Swedish development assistance in the support to the construction of hydropower plants. This part discusses Swedish state-supported hydropower exploitation of indigenous people’s territory within Sweden’s borders in the 20th century and the background of Swedish development assistance, from the 1950s to the early 1960s. The second part analyses the event of Swedish development assistance entering Tanzania and the Great Ruaha power project, with the main focus being on the period 1965 – 1970. The third part is an analysis of the technoscientific basis for the decisions taken to implement the Great Ruaha hydropower scheme. Main focus is on the period 1969-1974, discussed against the backdrop of precolonial and colonial studies. While focus is on the 1960s and 1970s, in both part two and three events in the 1980s and 1990s are discussed. The study shows that although Sweden was not a colonial power in Tanzania, colonial imagery, and relations to the colonial era, as well as Sweden’s background of internal colonialisation, exerted an influence on the decision-making process and the actors involved in the Great Ruaha power project.The study is mainly based on archival sources, complemented with oral sources from Tanzania and Sweden. Recognizing the complexity of large-scale hydropower and the attempts to control watercourses that large scale hydropower necessitates, in the specific context of decolonisation and development assistance that the decision-making process behind the Great Ruaha hydropower scheme reveals, the analysis of the actors involved is based on feminist and postcolonial perspectives.

  • Sissakian, Varoujan
    et al.
    Lecturer, University of Kurdistan, Hewler, KRG, Iraq. Private Consultant Geologist, Erbil, Iraq.
    Al-Ansari, Nadhir
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Geology, Geomorphology, Tectonics and Geography of the Tigris Basin2019In: Journal of Earth Sciences and Geotechnical Engineering, ISSN 1792-9040, E-ISSN 1792-9660, Vol. 9, no 4, p. 291-314Article in journal (Refereed)
    Abstract [en]

    The geography, geomorphology, tectonics, stratigraphy and economic potentials of areas alongside the Tigris River and its tributaries are given with emphasis on Iraqi parts. The river runs mainly in the Mesopotamian Plain, whereas its tributaries run in different tectonic zones with different characters. Accordingly, the Quaternary sediments being dominated by alluvial plain sediments cover large parts of the river course, whereas the tributaries run through areas covered mainly by different rocks types of Neogene age. The main economic potential is the existing oil fields, sulphur and limestone deposits for cement industry.

  • Sissakian, Varoujan
    et al.
    Lecturer, University of Kurdistan, Hewler, KRG, Iraq. Private Consultant Geologist, Erbil, Iraq.
    Al-Ansari, Nadhir
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Geography, Geomorphology, Stratigraphy and Tectonics of the Euphrates River Basin2019In: Journal of Earth Sciences and Geotechnical Engineering, ISSN 1792-9040, E-ISSN 1792-9660, Vol. 9, no 4, p. 315-337Article in journal (Refereed)
    Abstract [en]

    The geography, geomorphology, tectonics, stratigraphy and economic potentials of the Euphrates river basin are given with emphasis on Iraqi parts. The course of the river inside Iraq runs mainly in the Mesopotamian Plain, whereas basin of the river is located in different tectonic zones with different characters. Accordingly, the Quaternary sediments being dominated by the alluvial plain sediments cover large parts of the river’s course, whereas the basin area is covered mainly by different rocks types of different ages. The main economic potentials are the existing oil fields, limestone deposits for cement industry and many non-metallic deposits.

  • Abdullah, Mukhalad
    et al.
    Private Engineer, 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.
    Water Resources Projects in Iraq: Main Drains2019In: Journal of Earth Sciences and Geotechnical Engineering, ISSN 1792-9040, E-ISSN 1792-9660, Vol. 9, no 4, p. 275-281Article in journal (Refereed)
    Abstract [en]

    Iraq has a unique system of drainage. Soil texture, groundwater depth, water quality and other factors lead to the adaption of getting rid the drainage water away to the sea in order to control water quality. The system of drainage is not completed yet, however, the backbone of the system, which is Main Outfall Drain (MOD) was completed in 1992. Other main drains were completed and connected and others are still in progress of implementation where the most important drain after MOD is Eastern Euphrates Drain.

  • Abdullah, Mukhalad
    et al.
    Private Engineer, 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.
    Water Resources Projects in Iraq: Medium and Small Storage Dams2019In: Journal of Earth Sciences and Geotechnical Engineering, ISSN 1792-9040, E-ISSN 1792-9660, Vol. 9, no 4, p. 283-289Article in journal (Refereed)
    Abstract [en]

    Many medium and small dams were built in Iraq. These dams are distributed in three major areas. First is the northern area where many dams built in the period after 2003, even there are some that built in 1980s. Second, is the dams built in the eastern valleys, but these prove to be inefficient due to high rate of sedimentation even in the live storage. Third, is the dams in the western desert. These dams were  highly exploited in 1970s and 1980s to harvest as much as possible in this large and promising area and providing the livelihood conditions to settle people. The area has no more projects due to security issues.

  • Abdullah, Mukhalad
    et al.
    Private Engineer, 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.
    Water Resources Projects in Iraq: Irrigation Projects on Tigris River Tributaries2019In: Journal of Earth Sciences and Geotechnical Engineering, ISSN 1792-9040, E-ISSN 1792-9660, Vol. 9, no 4, p. 231-247Article in journal (Refereed)
    Abstract [en]

    There are five tributaries feeding Tigris River inside Iraq, on these many large and small projects were developed. Two kinds of projects can be distinguished, first the projects of complementary irrigation or semi-rain feed area for agriculture, and example of these projects is Kirkuk, Hawija, Eski-Kalak and small projects in mountainous area. The second group is the projects that depend mainly on irrigation, examples of that are the projects in lower Diyaa. Unfortunately, there was no exploitation of lands enough comparing with the available resources in Great Zab territories.

  • Abdullah, Mukhalad
    et al.
    Private Engineer, 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.
    Water Resources Projects in Iraq: Irrigation Projects on Tigris2019In: Journal of Earth Sciences and Geotechnical Engineering, ISSN 1792-9040, E-ISSN 1792-9660, Vol. 9, no 4, p. 201-230Article in journal (Refereed)
    Abstract [en]

    Along Tigris River reach inside Iraq, many large and small projects of irrigation were built. These projects depend on gravity flow or pumping. Starting from Jazeera project then small projects downstream Fatah, where these feed by pumping. After Samarra scheme, the important Ishaqi project, then after Baghdad, the projects of Nahrawan, Middle-Tigris and Dalmaj. The most important branch from Tigris is Gharraf Canal, which is not exploited yet, although plans were prepared decades ago. Downstream Kut Barrage, several projects are especially on the right side of Tigris. Finally, Shatt Al-Arab project which has a unique importance as it provide the solution for municipal need and save the orchards of dates in Basra.