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  • Hartvik, Heidi
    Luleå University of Technology, Department of Arts, Communication and Education.
    Idealized Gendered Behaviors in The Hunger Games Trilogy by Suzanne Collins2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Suzanne Collin’s trilogy The Hunger Games has become an international bestseller, and tells the story about Katniss Everdeen, a young citizen of District 12 in Panem. The object of this essay is to demonstrate that nurturing, being a warrior and pursuing beauty are the most idealized behaviors in The Hunger Games trilogy. By analyzing these behaviors from a gender perspective, based on the standpoint of Western society, I demonstrate how nurturing and pursuing beauty are feminine behaviors, and being a warrior is a masculine behavior. Furthermore, I outline how the characters’ behavior reflects their upbringings or the circumstances they are in. I conclude by considering what the popularity of Collins’s series indicates about contemporary perceptions of these behaviors, that are traditionally deemed as feminine or masculine in Western society. The result of the analysis indicates that the characters are being rewarded for both feminine and masculine behaviors. However, the characters showing a combination of both feminine and masculine traits gain more than the characters that possess either feminine or masculine qualities only. The contemporary views on femininity and masculinity are changing in Western society, and The Hunger Games trilogy gives us an indication about today’s view on the gendered behaviors in this essay.

  • Undebjörk, Anna
    et al.
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    Nilenstrand, Linda
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    En kartläggning av ett företag som arbetsgivare ur ett internt perspektiv: en kvantitativ och kvalitativ undersökning av identitet och profil2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med undersökningen var att kartlägga hur medarbetarna uppfattar ett företag som arbetsgivare.Syftet var även att kartlägga hur företaget vill uppfattas som arbetsgivare. Teoretiskt underlag i formav sju värdepropositioner användes för att mäta medarbetarnas uppfattning av företaget somarbetsgivare samt hur viktiga var och en av de sju värdepropositionerna var för medarbetarna. Genomatt använda en kvantitativ enkätundersökning undersöktes medarbetarnas uppfattning av företagetsom arbetsgivare i fråga om var och en av de sju värdepropositionerna. Genom enkätundersökningenundersöktes även hur viktiga var och en av de sju värdepropositionerna var för medarbetarna. Enöppen semistrukturerad intervju användes för att kartlägga hur företaget vill uppfattas somarbetsgivare av medarbetarna. Resultatet visade att medarbetarna skattade samtligavärdepropositioner högt vilket tyder på att alla värdepropositioner finns inom företaget i storutsträckning. Samtliga värdepropositioner ansågs även som viktiga av medarbetarna. Genomintervjun framkom det att ETHOS (Engagemang, Trygghet, Hållbarhet, Omtanke och Samverkan)är de faktorer som genomsyrar hela företagets verksamhet och som de vill bli associerade med somarbetsgivare.

  • Hjalmarsson, Julia
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    PIA as an Instrument for Work Environment Management at Arctic Paper Grycksbo2018Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis describes the work of investigating and developing Arctic Paper Grycksbo’s work environment work, focusing on their use of the Paper industry’s information system on work environment (Pappersindustrins Informationssystem om Arbetsmiljö, PIA). The work took place between January and June 2018 as a final part of the Master Programme in Industrial Design Engineering at Luleå University of Technology. The client of the project was Arctic Paper Grycksbo, one of three paper mills in the Arctic Paper Group.

    The work began with a literature study where areas such as production design, safety, work environment management, risk analysis, etc. was covered. Subsequently, a comprehensive survey of the PIA system was conducted in parallel with a survey of the company’s overall work environment management. This resulted in a clear picture of how the system is used, the role of the system in the work environment management and where there were shortcomings in the work being done today. An  identified deficiency was that the quality of investigations of the reported events varied a lot depending on who performed the investigation, another identified deficiency was that there were a number of delayed events that appeared to be investigated and corrected but wasn’t marked as done in the system. To investigate how other companies use the system, a benchmarking was conducted where companies using any variant of the system got to answer how they use the system and what they like about the system. Based on the investigation of the system, Arctic Paper Grycksbo’s use of the system and the use of the benchmarked companies, six areas for improvement was identified, such as the uneven quality of investigation, the delayed events, their use of the risk management module and their analysing of the information in the system.

    When the areas of improvement were identified, the work was continued to develop how they could improve their use of PIA. First, six of the former benchmarked companies were contacted for more detailed interviews about how they use the system. Based on the deeper benchmarking, the theoretical framework and the areas where Arctic Paper Grycksbo can improve, new routines for Arctic Paper Grycksbo’s use of PIA was developed. As part of the routines, recommendations and instructions for statistics were also developed that they should begin to follow in the system. Arctic Paper Grycksbo is recommended to start following eight safety indicators, three leading and five lagging, and seven trends regarding the characteristics of accidents and incidents.

    The possibilities in the system are huge and there is a great potential to use it for most parts of the work environment work if you only set the time from the beginning and are aware that it requires some active work.

  • Poohphajai, Faksawat
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.
    Impact of Fast and Slow Kiln Drying Schedule on Mould Resistance of Thermally Modified Scots pine2018Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
  • Silverberg, Petra
    Luleå University of Technology, Department of Arts, Communication and Education.
    Att motivera elevers läsning: En studie av lärares arbetssätt och metodval2018Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
  • Björnström, Albert
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Flödeskalibrering: Analys av kalibreringsprocesser2018Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In December 2015 the Paris Agreement was signed in order to create a better global climate. According to the agreement, all countries 'emissions shall be reported to the UN. To be able to do this current emission levels must be known, which means measurement and calculation of emissions are necessary.

     

    The state-owned mining company Luossavaara Kiirunavaara AB (LKAB) operates iron ore mines in Northen Sweden. The iron ore products produced at the KK4 coal mill in Kiruna, consists of some additives that form carbon dioxide when burned. The amount of additives burned is measured using two flowmeters. To ensure that these meters have approved accuracy, annual calibrations are performed where measured volume is compared to a reference volume. In order to ensure that LKAB's calibration method works, another type of calibration was performed by an external company. The results between the two calibration methods differ significantly, which led to this report.

     

    The purpose of this work is to develop improvement proposals for LKAB's calibration method and to present suggestions on how LKAB can create better conditions for the other so called transit time calibration method. By analyzing each method and performing measurements, tests and calculations, weaknesses are noted. Tests show that a weakness of LKAB's calibration is that the level measurement method used is person-dependent. Level measurement with laser range gauge is tested with good results, why this type of measurement is recommended in the future. The main weakness with transit time method is primarily that it is sensitive to variation of the inner diameter of the pipe. In order for this method to provide reliable results, rebuilding of pipes and carefully measured internal diameter are required. Accurate flow measurement means that current carbon dioxide emissions can be calculated, which enables continued work towards set environmental goals. Flowmeters also have a significant role in product quality in KK4, which means that this report can contribute to higher quality and economic profitability.

  • Gómez Rosal, Dulce Adriana
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science. Aalto University.
    Transfer of reinforcement learning for a robotic skill2018Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In this work, we develop the transfer learning (TL) of reinforcement learning (RL) for the robotic skill of throwing a ball into a basket, from a computer simulated environment to a real-world implementation. Whereas learning of the same skill has been previously explored by using a Programming by Demonstration approach directly on the real-world robot, for our work, the model-based RL algorithm PILCO was employed as an alternative as it provides the robot with no previous knowledge or hints, i.e. the robot begins learning from a tabula rasa state, PILCO learns directly on the simulated environment, and as part of its procedure, PILCO models the dynamics of the inflatable, plastic ball used to perform the task. The robotic skill is represented as a Markov Decision Process, the robotic arm is a Kuka LWR4+, RL is enabled by PILCO, and TL is achieved through policy adjustments. Two learned policies were transferred, and although the results show that no exhaustive policy adjustments are required, large gaps remain between the simulated and the real environment in terms of the ball and robot dynamics. The contributions of this thesis include: a novel TL of RL framework for teaching the basketball skill to the Kuka robotic arm; the development of a pythonised version of PILCO; robust and extendable ROS packages for policy learning and adjustment in a simulated or real robot; a tracking-vision package with a Kinect camera; and an Orocos package for a position controller in the robotic arm.

  • Heathcote-Fumador, Ida Ey
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering.
    MEEDS- A Decision Support System for Selecting the Most Useful Developmental Projects in Developing Countries: Case of Ghana2018Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Several sustainable development indicators have been used to monitor and measure the progress of various countries. Similarly, reports and data available about countries progress prove that development has not been equal in all regions.  On the brighter side, the data can be used to inform decision making in areas that are experiencing deficiencies. In this research, a decision support system(DSS) is built to help governments and NGOs to properly choose projects that align with the needs of the people. We approached this research by utilizing Abraham Maslow’s proven psychological framework on the hierarchy of needs as the main criteria for choosing projects for sustainable development. The system ranks development projects based on the needs priority and how much it has been fulfilled. It ranks projects that meet an urgent need that is also lacking fulfillment higher than other project alternatives. The social progress index (SPI), a comprehensive open data that measures the social progress of counties were correlated to the needs indicated by Maslow’s Hierarchy. The needs were then used as criteria in the AHP decision analysis model to build a classic DSS to aid in selecting the most appropriate development project.

  • Holmbom Ryytty, Stina
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    Passiv och interaktiv inlärning: Ett EEG-experiment om mental arbetsbelastning och riskkommunikation för brand- och säkerhetsrutiner2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Mental workload was investigated using electroencephalography (EEG) and National Aeronautics and Space Administration Task Load Index (NASA-TLX). The purpose of the study was to investigate the impact of passive and interactive learning on mental workload. The passive group (N = 5) had passive learning by reading a document regarding fire and safety when working in a laboratory, while the interactive group (N = 6) in addition to reading also had interactive learning by working with the same document in a group. On a follow-up test with EEG and NASA-TLX five days after the learning session, the subjects had a knowledge test based on the earlier learning. The results showed no significant divergence between the groups in mental workload measured with EEG and NASA-TLX or performance on a knowledge test. The subjects had difficulties remembering the fire and safety-routines on the knowledge test, which is consistent with previous research on risk communication. There was no correlation between EEG and NASA-TLX, which may be due to the difficulty in making accurate estimates of mental workload.

  • Johansson, Richard
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering.
    Machine learning på tidsseriedataset: En utvärdering av modeller i Azure Machine Learning Studio2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In line with technology advancements in processing power and storing capabilities through cloud services, higher demands are set on companies’ data sets. Business executives are now expecting analyses of real time data or massive data sets, where traditional Business Intelligence struggle to deliver. The interest of using machine learning to predict trends and patterns which the human eye can’t see is thus higher than ever. Time series data sets are data sets characterised by a time stamp and a value; for example, a sensor data set. The company with which I’ve been in touch collects data from sensors in a control room. In order to predict patterns and in the future using these in combination with other data, the company wants to apply machine learning on their data set. To do this effectively, the right machine learning model needs to be selected. This thesis therefore has the purpose of finding out which machine learning model, or models, from the selected platform – Azure Machine Learning Studio – works best on a time series data set with sensor data. The models are then tested through a machine learning pilot on the company’s data Throughout the thesis, multiple machine learning models from the selected platform are evaluated. For the data set in hand, the conclusion is that a supervised regression model by the type of a Decision Forest Regression model gives the best results and has the best chance to adapt to a data set growing in size. Another conclusion is that more training data is needed to give the model an even better result, especially since it’s taking date and week day into account. Adjustments of the parameters for each model might also affect the result, opening up for further improvements.

  • Mäki, Jonathan
    Luleå University of Technology, Department of Arts, Communication and Education.
    Etniska stereotyper inom tryckpress i Norr: En kvantitativ studie om etniska stereotyper inom fotbollsrapporteringen i tryckpress i Norr2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Denna studie använder sig av en kvantitativ analysmetod för att undersöka om tryckpressen i Norrbotten beskriver fotbollsspelarna i länet med hjälp av etniska stereotyper. För att ta reda på hur beskrivningen av fotbollsspelarna såg ut lästes totalt 729 artiklar i den Norrländska Socialdemokraten, samt i Piteå-Tidningen. Där totalt 106 etniskt stereotypiska beskrivningar återfanns. Resultaten som påvisas i den här studien visar att det förekommer olika beskrivningar på fotbollsspelare, baserat på spelarnas ursprung. I det stora hela var däremot rapporteringen i stor utsträckning positiv när det kom till beskrivningen av spelarnas attribut.

  • Singh, Sanjay
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Digital Forensics applications towards digitized collections in Cloud: a process approach to gathering evidences for authenticity, integrity and accessibility2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The growth of data/information on social media and in large organizations is huge in terms of velocity, volume and variety which is also something being tackled by the large IT companies providing Big Data solutions. The other challenges which are linked to managing the huge pile of data are about ensuring preservation and access of crucial data which has implications in every sector ranging from pharmaceuticals to aerospace and cultural institutions (museums, archives and governmental records).

    The challenges for data management are further complicated by the changing infrastructure landscape and the new business models to host data in virtualized cloud-based storage termed as Cloud solutions (PaaS, SaaS, and IaaS). Several large companies and public institutions are migrating their data/applications to cloud due to the apparent benefits of scalability, reliability, cost, easy of operability and security.

    The digitization and maintenance of e-records / digital archives in Cloud provides many potential benefits but it is also prone to several risks to ensure long-term retention of data as well as to ensure integrity, authenticity and accessibility of data. For several organizations such as memory institutions, heavy industries (Aerospace & Defence), banks and pharmaceutical companies, it is business critical to securely store data for long-term with integrity, authenticity and accessibility ensured. Hence, along with preservation of data, it is crucial to keep integrity and authenticity of data intact.

    The digital forensics methods and tools offer several solutions to ensure preservation of data and detect risks at pre-ingest stage of digital archiving to take appropriate measures towards ensuring authenticity, integrity and accessibility. The specific forensics methods and tools also offers possibilities to detect malicious activities or tampering in the digital archives and prepare report for presentation in the court.

    This thesis work is focussed on the applications of digital forensics towards ensuring the preservation of data in cloud-based storage. It discusses the applications of processes, methods and tools to improve the acquisition, management and accessibility of collections hosted on cloud-based storage (Google Drive, Sky Drive). The pilot platform (i.e. Google Drive) would be tested with forensics methods/tools to draw conclusions for the memory institutions about hosting their data on cloud storage.

  • Vallin, Axel
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Secure delivery system using blockchain technology2018Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
  • Karlsson, Emilia
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences, Social Sciences.
    Motstående intressens möjligheter att rättsligt utmana skogsavverkning2018Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Vid avverkning av skog är det tillräckligt att en anmälan görs till Skogsstyrelsen enligt 14 § skogsvårdslagen (1974:429). När skogsbrukaren inte begär tillstånd utan endast lämnar in en anmälan meddelar Skogsstyrelsen vanligen inte ett överklagbart beslut. I uppsatsen utreds frågan om besvärsystemet enligt skogsvårdslagen lever upp till materiell och processuell EU-rätt, med det huvudsakliga syftet att analysera om den svenska skogsvårdslagstiftningen kan genomföra de krav som ställs enligt Århuskonventionen och EU:s naturvårdsdirektiv. Uppsatsen har fokuserat på hur den berörda allmänhetens tillgång till rättslig prövning enligt Århuskonventionen påverkar möjligheten att få en avverkning rättsligt prövad enligt svensk rätt. Slutligen har en komparation med den finska rätten genomförts eftersom det i Finland, liksom i Sverige, saknas möjlighet att få beslut efter avverkningsanmälan enligt skogslagstiftningen rättsligt prövat.

  • Petersson, Christer
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    “Frontbyråkrater” och uppgiftsberoendehandlingsutrymme: En fallstudie av kommunala inspektörer2018Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    “Frontbyråkrater” (eng. Street-level bureaucrats), som arbetar i slutet av den offentliga policykedjan, har en viktig roll för hur offentlig policy implementeras. Teorin om frontbyråkrater sägeratt tjänstemän som arbetar i slutet av policykedjan måste tas i beaktande för att fullt ut förståimplementeringen av offentlig policy. Anledningen är att, säger teorin, dessa tjänstemänutformar policy mer än politikerna på grund av det handlingsutrymme och den handlingsfrihet dehar. Med utgångspunkt i teorin om frontbyråkrater och uppfattningen att "handlingsutrymme"ska ses som uppgiftsberoende vill den här studien undersöka vilka faktorer som påverkarhandlingsutrymmet. En fallstudie med flera analysenheter genomfördes för att besvarauppsatsens frågeställningar. Det empiriska materialet består av semistrukturerade intervjuer med8 kommunala inspektörer och en granskning av det legala ramverk som styr deras arbete. Utifrånteorin härleds tre faktorer och ett tentativt analytiskt ramverk konstrueras för analys. Resultatetvisar att det legala ramverket och kontrollmekanismer påverkar arbetsuppgiftens komplexitetvilken i sin tur påverkar det faktiska handlingsutrymmet hos frontbyråkraten. Resultatet stöderuppfattningen att handlingsutrymme ska ses utifrån den uppgift som är för handen varför vidareforskning behöver använda tillvägagångssätt som karakteriseras av en hög grad avkontextualisering. Resultatet visar också, vilket stöds av tidigare forskning, att politiskabeslutsfattare kan stödja implementeringen av policy genom tydligare vägledningar och direktiv.

  • Ranade, Maitreya
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Tree height estimation with TanDEM-X products: Digital Elevation Model (DEM) andForest/ Non-forest (FNF) Map2018Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
  • Nymark, Anton
    Luleå University of Technology, Department of Engineering Sciences and Mathematics.
    Förpositionering Inmatare: För Cambio© barkningslinje2018Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
  • Bergquist, Caroline
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    Transformativt ledarskap: En kvantitativ studie om samband mellan egenskaper hos ledare och anställd2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This survey examined employees’ estimates of their leader's transformative behavior. The research questions addressed the relationship between estimated transformative characteristics of the leader and the respondent's and leader's gender, age and education. The existence of separate estimates in the private and public sectors was also studied. Transformative leadership was measured with MLQ X5, developed by Avolio and Bass 2002, translated into Swedish. Reliability and validity of MLQ X5 was checked. Significant association was obtained between the leader’s education in leadership, the respondent's highest level of education and the respondent's rating of the leader's transformative behavior. No relationship was obtained between age, sex, private or public sector and rating of the leader's transformative behavior. One conclusion is that the respondent's education level and the leader's knowledge of leadership affect employee perceptions of the leader's transformative behavior.

  • Jonsson, Natalie
    Luleå University of Technology, Department of Arts, Communication and Education.
    Förskolechefers erfarenheter kring mottagandet av nyanlända familjer i förskolan2018Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med denna studie var att undersöka några konstruktioner utav förskolechefers beskrivningar av erfarenheter och strategier i mottagandet av nyanlända familjer i förskolan. Till detta syfte formulerades fyra frågeställningar: Vad för konstruktioner framträder i förskolechefernas beskrivningar kring mottagandet av nyanlända familjer? Vad för möjligheter/svårigheter visar sig i dessa konstruktioner? Vilka förutsättningar ger förskolecheferna förskollärarna i arbetet med mottagandet av nyanlända familjer? Hur garanterar förskolecheferna att förskollärarna har den kompetens som behövs för att kunna genomföra mottagandet på ett professionellt sätt? För att få svar på dessa frågeställningar genomfördes tre kvalitativa intervjuer med tre förskolechefer med hjälp av en blandning av semistrukturerade och ostrukturerade frågor. Den teori som legat till grund för denna studie är det socialkonstruktionistiska perspektivet för att få en bild på förskolechefernas egna beskrivningar av erfarenheterna. Intervjuerna spelades in, transkriberades och sorterades så att fyra teman blev synliga.

    Resultatet visade på att förskolecheferna upplevde att mottagandet av nyanlända familjer bjöd in till en större mångfald i förskolorna där pedagoger och barn utmanas i deras egna tankar och värderingar. Däremot visade resultatet även att organiseringen av mottagandet är bristfällig och att pedagogerna ute i verksamheterna saknar kompetens. Trots många år av invandring till Sverige finns det fortfarande en hel del utvecklingsområden.

  • Doherty, John
    Luleå University of Technology, Department of Arts, Communication and Education, Education, Language, and Teaching.
    Urkundsläsning: Lärarutbildning utvecklingsarbete rapport2018Student paper other, 12 HE creditsStudent thesis
    Abstract [en]

    This study reports a series of lectures with the didactic experiment of introducing high school

    religious studies students to focused readings of specific, randomly chosen passages from the

    central scriptures of several major world religions. The study addresses the question whether

    or not the students’ evaluation of the readings indicates that this didactic technique fulfills a

    useful purpose in regard to the Swedish School Board’s knowledge requirements for the

    religious studies course. Teacher candidates are required to creatively test a didactic

    technique and this study explores therefore the little-known area of students’ reactions to

    direct exposure to religious narratives in their traditional contexts. Survey questioning of the

    student participants is juxtapositioned with the surveying of a larger test group. The value of

    the reading of religious narratives is examined in regard to secularization theory and its

    belief/knowledge dichotomy. The study indicates that the voice of traditional wisdom

    contained in religious narratives deserves further attention as a means to achieve the

    Swedish curriculum’s citizenship and erudition goals.

    Keywords: scripture, religions, religious studies, knowledge requirements, didactics, survey,

    measurement, standpoint, secularization, citizenship, belief

  • Struckmeier, Oliver
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology. Aalto University.
    Generating Explanations of Robot Policies in Continuous State Spaces2018Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Transparency in HRI describes the method of making the current state of a robotor intelligent agent understandable to a human user. Applying transparencymechanisms to robots improves the quality of interaction as well as the userexperience. Explanations are an effective way to make a robot’s decision making transparent. We introduce a framework that uses natural language labels attached to a region inthe continuous state space of the robot to automatically generate local explanationsof a robot’s policy. We conducted a pilot study and investigated how the generated explanations helpedusers to understand and reproduce a robot policy in a debugging scenario.

  • Siddiquee, Kazy Noor E Alam
    et al.
    University of Science and Technology, Chittagong, Bangladesh.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science. Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Distance- Spanning Technology.
    Moreno Arrebola, Francisco Javier
    HeidelbergCement, Spain.
    Abedin, Md. Zainal
    University of Science and Technology, Chittagong, Bangladesh.
    Hossain, Mohammad Shahadat
    University of Chittagong, Bangladesh.
    Estimation of Signal Coverage and Localization in Wi-Fi Networkswith AODV and OLSR2018In: Journal of Wireless Mobile Networks, Ubiquitous Computing, and Dependable Applications, ISSN 2093-5374, E-ISSN 2093-5382, Vol. 9, no 3, p. 11-24, article id 2Article in journal (Refereed)
    Abstract [en]

    For estimation of signal coverage and localization, path loss is the major component for link budget of any communication system. Instead of traditional Doppler shift or Doppler spread techniques, the path loss has been chosen for IEEE 802.11 (Wi-Fi) signals of 2.5 and 5 GHz to measure the signal coverage and localization in this research. A Wi-Fi system was deployed in a MANET (Mobile Adhoc NETwork), involving both mobile and stationary nodes. The Adhoc network was also assessed in a routing environment under AODV and OLSR protocols. The proposal was evaluated using the OPNET Modeler simulation environment.

  • Lindström, John
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, ProcessIT Innovations R&D Centre. Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Digitalisering för företag inom tillverknings- och processindustrin: Visionärt kunskapsunderlag till den regionala digitala agendan2016Report (Other academic)
  • Baer, Máren Ingá
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.
    Crack propagation calculations in non-elastic metals2018Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    It is important to know the lifespan of a component, thus services can be planed. At Siemens Industrial Turbomachinery AB (SIT AB) develop and produce gas and steam turbines, the turbines are heavily strained by thermal and centrifugal forces during their life span which lead to cracking. Today there is no good crack propagation method for materials with large amount of plastic deformation and creep. At SIT a new method, ΔKBDCPP, has been developed that takes these phenomenon in consideration. It is assumed that the whole model has plastic material properties except circular elements at the crack front which have elastic properties. The new method is reviewed by doing simulations on a a specimen model in Franc3D together with the FE program Abaqus. There have been conducted thermo-mechanical fatigue (TMF) tests and 2D simulations on specimen to measure the crack propagation. The TMF tests where immitaded in new simulations with the method ΔKBDCPP. Forces, creep times, cycles and material data where emulated in the model and then simulated. The number of cycles per crack length for the isothermal simulations became higher then for the TMF tests. This is a expected result because the conditions are optimal during simulations, which they may not be during experimental test. The result of ΔKBDCPP are closer to the TMF test results then the 2D simulated ΔKeffective, another crack propagation calculation method. Additionally, out-of-phase (OP) simulations where carried out, in OP the maximum temperature and maximum stress do not coincide. When the temperature is at max the component is held in the minimum stress. For OP simulations the results became irregular, for one of the simulations the number of cycles per crack length became lower for the simulated specimen than for the TMF test, and contrariwise for the other OP simulation. However, it was concluded that the later was correct because the majority of the simulations, and all the isothermal simulations, gave this result. it also was the result for the isothermal simulations. One OP simulation was compared to a 2D simulation and here the method of ΔKBDCPP was also more accurate to the TMF tests. The method of ΔKBDCPP seem to function well however, the solving time for models with creep is long. A model with a small crack and creep is time consuming to simulate, which is a disadvantages.

  • Eyob, Helen
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    How does expert endorsement affect consumer’s perceived credibility?2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Endorsement is avery common marketing strategy and has been traced back to the 19th century. Expert endorsement is a type of endorsement that is frequently used to endorse a multitude of different products. Previous research on endorsement has shown a positive connection between endorsement and credibility.

    This research aims to examine expert endorsement and how it relates to perceived credibility. This research had a qualitative approach and explored credibility of expert endorsement from the consumer’s point of view by using the source model theories.

    The main findings were that expert endorsement does have a positive effect on the perceived credibility of the endorsement. But as previous research suggested not all the source factors: Trustworthiness, expertise attractiveness likability similarity and familiarity were as vital for the credibility of the expert. The most important source of credibility when engaging in expert endorsement was the perceived expertise of the expert.

  • Florén, Tina
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Integrerad arkitektur: en metodutveckling2018Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
  • Forsberg Ekdal, Linda
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    Begreppslig validering: av ett ledarskapstest2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Ledin (2002) has created a work psychological leadership test where he uses different scenarios to explain different statement. The purpose of my work is to validate Ledin’s factor names by comparing the factor names used by Ledin with those created by me through a concept analysis. Are there any similarity or difference between the factor names? This was examined with a qualitative questionnaire that was filled in by ten students. The subject was asked to suggest a common concept for a number of statements concerning leader’s in a disturbed meeting situation. Concepts were assigned to eleven sets with reactions. The concepts were analysed with Svenska akademins ordbok in order to identify the original definitions. When the concepts had been compiled a factor name was specified. Three factor names correspond to cognitions, three correspond to emotions and five factor names correspond to behavior. Ledin’s and my factor names have similar meanings, the differences have to do with how narrow the meanings are and they are also affected by the impact on a meaning from the situation and context. Thus, Ledin’s (2002) factor names are validated.  

  • Haraldsson, Truls
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering.
    Real-time Vision-based Fall Detection: with Motion History Images and Convolutional Neural Networks2018Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Falls among the elderly is a major health concern worldwide due to theserious consequences, such as higher mortality and morbidity. And as theelderly are the fastest growing age group, an important challenge for soci-ety is to provide support in their every day life activities. Given the socialand economical advantages of having an automatic fall detection system,these systems have attracted the attention from the healthcare industry.With the emerging trend of Smart Homes and the increasing numberof cameras in our daily environments, this creates an excellent opportu-nity for vision-based fall detection systems. In this work, an automaticreal-time vision-based fall detection system is presented. It uses motionhistory images to capture temporal features in a video sequence, spatialfeatures are then extracted efficiently for classification using depthwiseconvolutional neural network. The system is evaluated on three publicfall detection datasets, and furthermore compared to other state-of-the-art approaches.

  • Häggström, Linus
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Integrering av BIM- och GIS-data på semantiska webben2018Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The population of the earth is calculated to increase by 2 billion people by the year 2050. As population increases, urban densities will increase. To manage all the people cities must become smarter and more sustainable.

    Information and communication technology (ICT) will be a major part of making the cities smarter by communicating with residents, but also for different systems within the city. Two examples of systems that will need to communicate are Geographical Information Systems (GIS) and Building Information Models (BIM). For the systems to communicate, the information need to be machine readable. One way to do this is to use the World Wide Web founder, Tim Berners-Lee´s, concept the semantic web. Semantic web enables computers to understand the meaning and semantics of the information stored in the semantic web.

    The purpose of this thesis has been to study how semantic web technology can be used for integration of BIM and GIS data. The questions answered during the work are how GIS and BIM can be described with semantic web technology and if it is possible to visualize BIM and GIS data from the same database.

    To reach the purpose and answer the questions, an explorative and qualitative method has been used. First, a literature study was conducted to enable the author to build an understanding of the Semantic Web and how BIM and GIS data were built. After the literature study, the theory of knowledge was translated into reality by setting up a semantic database and transforming GIS and BIM data into the semantic web.

    The result showed that both BIM and GIS data could be converted and stored in the semantic web. To transform and store geographic information, Open Geospatial Consortiums (OGC) ontology GeoSPARQL was used. For BIM, World Wide Web Consortiums (W3C) ontology for buildings Linked Building Data (LBD) was used. RDF2Map was used to visualize GIS data from the database. However, no method to visualize BIM data directly from the database was identified.

    To analyze the result, a case study was conducted on real project data. The project data was obtained from Sweco's design of a LKAB pump station, at the reopening of the open pit in Svappavaara. The case study resulted in geographic information being transformed, stored and visualized on the semantic web. The building information model used in the Svappavaara project was only provided visualization and therefore the model did not contain any information of the geometries. Because of this, no conversion was made to LBD.

    The conclusion from the thesis is that geographic information is possible to store and visualize on the semantic web but that the visualization should be developed using GeoSPARQL to ensure correct geometries. BIM models can be stored on the semantic web, but visualization is not possible directly from the database. The storage of BIM is limited by the size of the model. Model larger than 46 megabytes was not able to be converted. Another conclusion from the thesis is that, when designing a BIM model, information must be properly stored and exported to ensure that no information is lost.

  • Jasim, Al-Hussein Hameed
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering.
    Blixt™: An Available Bandwidth Measurements’ Approach for High-Speed Mobile Networks2018Independent thesis Advanced level (degree of Master (Two Years)), 80 credits / 120 HE creditsStudent thesis
    Abstract [en]

    Mobile networks are in the process of becoming the world’s leading medium for data traffic. This challenge has raised the bar for Quality of Services (QoS) provided by the mobile network operators. It requires methods and tools to verify the Service Level Agreement (SLA) and benchmark competitors by comparing metrics of QoS, e.g. the round-trip time and available bandwidth. For this purpose, Blixt™ has been developed, which is a property of InfoVista Sweden AB. Blixt™ is an Android application which measures the available bandwidth and the round-trip time for the latest generation of mobile networks. Blixt™ approach relies on a time-stamping protocol commonly known as Two-Way Active Measurement Protocol (TWAMP). This research work discusses how the packet probing parameters affect the accuracy of measurements and the level of intrusiveness. The performance of the technique was experimentally tested and compared to other tools and methods, namely, iPerf3, nPerf and FTP test.

  • Johansen, Alexander
    Luleå University of Technology, Department of Engineering Sciences and Mathematics.
    Reverse Engineering Av En Rörverkskvarn För Framtida Simuleringar2018Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
  • Larsson, Emelie
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    Wax-accessory for cross-country skiers: Development of a wax-bench that collect waste2018Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This is a master thesis report for MSc in Industrial Design Engineering at Luleå University of Technology. It is a development project where a wax-bench for cross-country skiing has been developed. The wax-bench have been developed to facilitate the clean-up for the user and to gather all wax-accessories at one place.

    In this report the entire project can be followed from start to finish, how the requirements were found, who is the user, what should the product handle and how was the ideas ge- nerated. The final result is a wax- box that is vacuum formed and folded in the middle. In the box there are adjustable profiles to place the ski on and an adjustable attachment part in the center that attaches to the skis binding. The box acts as a collector of the waste that is produced when waxing skis, and as storage of waxing accessories when not in use. How to install the accessory in the box is not yet determined, but the idea is to develop a specific bag that fits perfectly in the wax-box and includes all the usual accessories. This bag should then be taken out when you wax and put back in the box after complete the waxing.

  • Sundberg, Daniel
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    Glad på insidan: En EEG-studie om emotionell priming.2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Despite the extensive research conducted on both priming and emotions, and the relationship between them, there is still reason to further seek to deepen our understanding of how emotional priming is processed in the brain. The current study aimed to be a small but relevant part of neuropsychology's ongoing work in supporting continued progress and in-depth understanding of how the human brain works.

    Experiments with emotional priming have been carried out to examine the brain's reactions with EEG measurements. The results of the study show a neurological difference between how the brain reacts to smiling faces versus neutral faces. However, no priming effect could be detected in repeated tests, which could indicate that priming does not occur at the neurological level but requires some form of conscious or unconscious cognitive activation to have an effect.

  • Viklund, Karin
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    Belöningssystem: Hur påverkar de arbetarnas upplevda motivation?2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    A well-functioning reward system is of great importance for how a company works towards its goals and it also affects the relationship between employees and the company. The aim of this study is to understand how the current reward systems at a specific company in Sweden affect the experience of motivation among the employees. The purpose is investigated by finding out what factors motivate employees to want to perform a good quality work, how employee motivation is affected by monetary and non-monetary rewards as well as by group and individual rewards. The survey is conducted at a company in Sweden that uses reward systems as a tool to motivate employees. The empirical material is collected through eight semi structured interviews, including seven with the employees and one interview with a company leader. During the interviews an interview guide based on both theoretical and open questions is used. The result shows that all employees are motivated by commission. The majority of employees are more motivated by non-monetary rewards such as praise and recognition over monetary rewards. The majority of employees are more motivated by group rewards over individual rewards. The company works with set goals and has regular feedback, which contributes to the motivation of employees. Task variation and increased responsibility leads to increased motivation and wellbeing at work. The main motivational factors vary with the employees, which is in line with previous research, explaining that the challenge of reward systems is to structure it with a greater variety to choose from, as well as identifying the motivational source of each individual employee. 

  • Ekvall, Linus
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering.
    Airborne Radar Ground Clutter Suppression Using Multitaper Spectrum Estimation: Comparison with Traditional Method2018Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    During processing of data received by an airborne radar one of the issues is that the typical signal echo from the ground produces a large perturbation. Due to this perturbation it can be difficult to detect targets with low velocity or a low signal-to-noise ratio. Therefore, a filtering process is needed to separate the large perturbation from the target signal. The traditional method include a tapered Fourier transform that operates in parallel with a MTI filter to suppress the main spectral peak in order to produce a smoother spectral output. The difference between a typical signal echo produced from an object in the environment and the signal echo from the ground can be of a magnitude corresponding to more than a 60 dB difference. This thesis presents research of how the multitaper approach can be utilized in concurrence with the minimum variance estimation technique, to produce a spectral estimation that strives for a more effective clutter suppression. A simulation model of the ground clutter was constructed and also a number of simulations for the multitaper, minimum variance estimation technique was made. Compared to the traditional method defined in this thesis, there was a slight improvement of the improvement factor when using the multitaper approach. An analysis of how variations of the multitaper parameters influence the results with respect to minimum detectable velocity and improvement factor have been carried out. The analysis showed that a large number of time samples, a large number of tapers and a narrow bandwidth provided the best result. The analysis is based on a full factorial simulation that provides insight of how to choose the DPSS parameters if the method is to be implemented in a real radar system.

  • Hulter, Oskar
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering.
    Improving Software Documentation using Data Visualization2018Independent thesis Basic level (degree of Bachelor), 180 HE creditsStudent thesis
    Abstract [en]

    This exploratory case study argues for the thesis that data visualization (dataviz) can have a positive impact on users understanding and perception of code documentation. The basis of the thesis is a case study performed in collaboration with SensiNet AB. The introduction describes the case and the problem area. The theoretical framework and methodology focus on theoretical foundations and how the data collection was planned and performed. The paper concludes with a brief discussion of related work and several suggestions for future studies.

  • Hägglund, Kristoffer
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    Symmetric alpha-Stable Adapted Demodulation and Parameter Estimation2018Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Transmission and reception of signals in wireless communication systems is affected by additive interference corrupting the signal. Traditionally, the interference is assumed to be AWGN and the system designs are usually based on that assumption. Modern military platforms consists of many electrical components and systems and as such the noise affecting the signals is often a product of interference between the components and systems. This type of noise tend to be very impulsive in nature. The standard AWGN model is not suited for impulsive noise which leaves an opportunity to investigate the performance of a demodulation scheme adapted to the current interference environment in order to increase the performance gain. To properly analyze the performance of an interference-adapted demodulator, knowledge about the characteristic parameters of the chosen noise model is required to perform the necessary calculations. 

    This project combines the aspect of adaptive demodulation with parameter estimation evaluation. Four different parameter estimation techniques specifically customized for Symmetric alpha-Stable distributed noise were implemented and examined. The four methods were the Empirical Characteristic Function (ECF) method, Fractional Lower-Order Moments (FLOM) method, Extreme-Order Statistics (EOS) method as well as the Quantiles method. The effectiveness and performance of the methods were investigated in two Symmetric alpha-Stable processes of varying level of impulsiveness as well as two Class A processes in order to monitor the performance in noise not specifically distributed according to the intended model, functioning as an arbitrary representation of non-Gaussian interference. The results were evaluated using the measure of Kullback-Leibler Divergence. The demodulator was designed for Symmetric alpha-Stable distributed noise and implemented using an LLR-algorithm. The simulations were performed using an LDPC-coding protocol and the experiment was conducted in both Class A and Symmetric alpha-Stable distributed noise. The modulation schemes were 4-QAM and BPSK.

    The simulations showed that ECF was the most consistent parameter estimation method overall, regardless of distribution model or number of available samples. FLOM performed well in alpha-Stable noise but struggled in Class A processes. EOS and Quantiles shared the struggles of fewer available samples.

    The experiments show that an alpha-Stable adapted demodulator coupled with a parameter estimation technique based on the empirical characteristic function (ECF) is a very competitive and viable option in impulsive interference environments regardless of the origin of the noise distribution. The performance gain vis-a-vis demodulation using the standard AWGN option exceeded thresholds of upwards 25 dB for impulsive noise processes.

  • Håkansson, Lena
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Luther Wallin, Ida
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Räddningstjänstpersonal i beredskap: En studie om rekryteringssituationen i Sverige2018Independent thesis Basic level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The Swedish civil protection service activities are governed by ‘Lag (2003:778) om skydd mot olyckor’ and the first national objective reads: ‘The provisions of this law aim to make people's lives and health as well as property and environment throughout the country a satisfactory and equivalent protection against accidents, taking into account the local conditions.’

     

    Emergency services are organized with firefighters in three different types of employment. One of these is part time firefighters, and the formal term for this employment is ‘Räddningspersonal i beredskap’, RiB. About 67% of Sweden's firefighters consist of RiB and as early as 1999, difficulties with staffing was noted. In contact with the Swedish Civil Contingencies Agency and Swedish Association of Local Authorities and Regions, the problems with recruitment of RiB was known, but the vast extent of these problems had not yet been discovered.

     

    This study consists of a survey of the current situation regarding the recruitment situation for RiB in Sweden. The survey is controlled and compared against the Swedish government's investigation from 2003. The compilation study involves all participants from the previous investigation which results in a response rate of 100%. The study shows that new recruitment and maintenance of preparedness has a negative trend, even though the basic education has been modified and the municipalities have modernized and developed recruitment methods. In the national compilation, of year 2018 involving 111 respondents representing more than 60% of Sweden's municipalities, it appears that the majority of emergency services experience difficulties in recruitment, a total of 331 vacancies for permanent RiB services and 194 vacancies for temporary employment and more than half, 52%, of the respondents fail to maintain the determined preparedness continously.

     

    The main reason for the recruitment situation is the demographic conditions, which is linked to the fact that 200 of Sweden's 290 municipalities meet the European commission’s definition of rural areas. What is most alarming is that it directly affects municipalities' abilities to maintain preparedness.

     

    There is an opportunity to improve and strengthen the situation through various kinds of improvement actions and/or a combination of these. There is no clear solution to the problem. As conditions are different in most municipalities, it is also difficult to provide a simple and general way for how to proceed. What is clear is that it is up to our politicians and the state to try to support the emergency services in a different way than today, alternatively, investing in rural areas. The goal should be to lead Sweden to become a leading country at the forefront of developing, promoting and supporting rural areas.

  • Isaksson, Janinah
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering.
    Isaksson, Erika
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering.
    Elbolagens omställning mot tjänstefiering och vikten av kundinvolvering i tjänstedesignprocessen2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • Khamrakulov, Maxim
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Secure Delivery System: Traditional Approach and Comparison to the Blockchain Model2018Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Blockchain technologies have gradually gained popularity since the beginning of 2010. As

    of 2018, many companies and financial institutions are redesigning and building new sys-tems with blockchain technologies as major foundation. On paper, the blockchain has nu-merous advantages over the traditional centralized approach, however, this study showed,

    that there are some large drawbacks, which are associated with usage of blockchain. Themost significant downsides are blockchain’s low performance, enormous cost and highenvironmental impact, compared to traditional client-server based systems.

    Therefore, the overall goal of this study was to highlight the importance of consider-ing these drawbacks and discuss, how performing of a detailed feature analysis during

    the design phase, might guide application developers to the correct path, during theimplementation phase of a system, when blockchain is considered being an alternativeto the traditional client-server approach. As the result of this study, it turned out, thatboth client-server and blockchain based approaches do have their respective use casesand disadvantages. A conclusion was drawn, that the best approach would be eitherto use a mix of both technologies, or to use the blockchain as a verification mechanismbehind a client-server backend, in order to improve its data integrity and persistencequality attributes.

  • Rutqvist, David
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering.
    Data-Driven Emptying Detection for Smart Recycling Containers2018Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Waste Management is one of the biggest challenges for modern cities caused by urbanisation and increased population. Smart Waste Management tries to solve this challenge with the help of techniques such as Internet of Things, machine learning and cloud computing. By utilising smart algorithms the time when a recycling container is going to be full can be predicted. By continuously measuring the filling level of containers and then partitioning the filling level data between consecutive emptyings a regression model can be used for prediction. In order to do this an accurate emptying detection is a requirement.

    This thesis investigates different data-driven approaches to solve the problem of an accurate emptying detection in a setting where the majority of the data are non-emptyings, i.e. suspected emptyings which by manual examination have been concluded not to be actual emptyings. This is done by starting with the currently deployed legacy solution and step-by-step increasing the performance by optimisation and machine learning models. The final solution achieves the classification accuracy of 99.1 % and the recall of 98.2 % by using a random forest classifier on a set of features based on the filling level at different given time spans. To be compared with the recall of 50 % by the legacy solution.

    In the end, it is concluded that the final solution, with a few minor practical modifications, is feasible for deployment in the next release of the system.

  • Stig, Oscar
    et al.
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    Mandelius, Dag
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    Hinder vid implementering av uppkopplad tillverkning och dess orsaker: en flerfallstudie hos SMF inom tillverkningsindustrin ur ett resursbaserat synsätt2018Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Purpose – The purpose of the study was to provide an understanding of resources that may be inadequate but necessary when implementing online manufacturing for SME’s in the manufacturing industry. To address the purpose two research questions (RQ) were developed, RQ 1: What resources can affect SME’s in the manufacturing industry in the implementation of online manufacturing? RQ 2: What are the underlying reasons to that resources constitute obstacles when implementing online manufacturing?

    Method – The study has been conducted through a deductive research with inductive elements. The research method was chosen because the study was based on the literature review and then verified and developed on the basis of the empirical data analysis. The study adopted a qualitative data collection, and interviews were conducted with individuals from 11 different companies. The selection of interviewed companies was limited to Swedish SME’s in the manufacturing industry, which has implemented online manufacturing in the form of automated processes. The chosen analysis method of the collected data is in the form of a thematic analysis.

    Findings – The study resulted in a conceptual framework, which is aimed primarily for SME’s in the manufacturing industry that wants to implement online manufacturing. The conceptual framework is built on six dimensions, where physical resources are primary and the remaining five are secondary. The physical resources are the main resource since they enable automated processes for SME’s in the manufacturing industry. While the remaining five resources serve as a support for physical resources. The developed dimensions show the resources that can be inadequate and its underlying reasons of the implementation of online manufacturing.

    Theoretical contributions – The study contributes to previous literature on the implementation of online manufacturing for SME’s in the manufacturing industry by investigating the underlying reasons of resources being perceived as obstacles and why an implementation is not taking place. One of the contributions is the visualization of the

    resources that may affect SME’s in the manufacturing industry to implement online manufacturing. This study has also contributed with a new resource. The result showed that it is an understanding of the overall picture of the market that is important for companies, and not just the reputation. The result also pointed out that reputation was about the understanding of the markets, such as the competitive situation, which led to the emergence of the new dimension called market resources. Furthermore, the reasons that resources can be perceived as barriers to implementing online manufacturing were partly confirmed in the result part. Finally, new reasons emerged why resources can be perceived as obstacles.

    Practical implications – The main practical contribution from this study is the conceptual framework that has its foundation in the resource-based view and demonstrates the shortcomings that may arise in a company's resources prior to an implementation of online manufacturing. It is primarily managers of SME’s in the manufacturing industry, who are considering an implementation of online manufacturing in their factories, that will be guided by the conceptual framework. Tillväxtverket can, with the help of this study, increase understanding for SME’s in the manufacturing industry in Sweden. This, in turn, can help companies to get a better understanding of which resources that can prevent an implementation of online manufacturing. Through an increased understanding and with the help of Tillväxtverket SME’s can prevent difficulties from occurring during the planning phase.

  • Lund, Per
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering.
    Information Security Awareness amongst students: A study about information security awareness at universities2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In the era of information, it has become vital for companies to make sure that their information is properly protected. They are therefore, willing to spend large amounts of resources on protecting their information. This can usually be done in a large variety of ways. The root of information security is first and foremost, having policies that regulate how information security is upheld. And secondly, by teaching employees proper practice of information security. These are however procedures that are not all that common in a university environment, and even more so in relation to students.

     

    In order to explore this phenomenon further, an exploratory study have been carried out to find more information on the subject. This has been done in several ways in order to grasp as much information as possible. Firstly, by doing a literary study to find out what is already known within the field of information security in regard to students. Secondly, by doing a quantitative study that evaluates the student’s information security awareness. And lastly, by conducting an interview with a member of staff at a university to find out their attitude towards the phenomenon. 

     

    The thesis concludes by suggesting how universities might want to handle information security in relationship to students. 

  • Edvartsen, Hannes
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering.
    OCR of dot peen markings: with deep learning and image analysis2018Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    A way to follow products through the chain of production is important in the process industry and it is often solved by marking them with serial numbers. In some cases permanent markings such as dot peen marking is required. To ensure profitability in the industry and reduce errors, these markings must be read automatically. Automatic reading of dot peen markings using a camera can be hard since there is low contrast between the background and the numbers, the background can be uneven and different illuminations can affect the visibility. In this work, two different systems are implemented and evaluated to assess the possibility of developing a robust system. One system uses image analysis to segment the numbers before classifying them. The other system uses the recent advances in deep learning for object detection. Both implementations are shown to work in near real-time on a cpu. The deep learning object detection approach was able to classify all numbers correct in a image 60% of the time, while the other approach only succeeded in 20% of the time.

  • Söderberg, Charlotta
    et al.
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences, Social Sciences.
    Hammer, M.
    Kvarnström, M.
    Magnussen, K.
    Mustonen, T.
    Määenpää, M.
    Køie Poulsen, M.
    Roth, E.
    Sörensen, J.
    Tunón, H.
    Vävare, S.
    Options for governance,institutional arrangements andprivate and public decision-making across scales and sectors2018In: Biodiversity and ecosystem services in Nordic coastal ecosystems: an IPBES-like assessment. Volume 1. The general overview / [ed] Belgrano, A, Copenhagen: Nordisk Ministerråd, 2018, , p. 200p. 161-189Chapter in book (Other academic)
    Abstract [en]

    This report describes the status and trends of biodiversity and ecosystem services in the Nordic region, the drivers and pressures affecting them, interactions and effects on people and society, and options for governance. The main report consists of two volumes. Volume 1 The general overview (this report) and Volume 2 The geographical case studies. This study has been inspired by the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystems Services (IPBES). It departs from case studies (Volume 2, the geographical case studies) from ten geographical areas in the Nordic countries (Denmark, Finland, Iceland, Norway, Sweden) and the autonomous areas of Faroe Islands, Greenland, and Åland. The aim was to describe status and trends of biodiversity and ecosystem services in the Nordic region, including the drivers and pressures affecting these ecosystems, the effects on people and society and options for governance. The Nordic study is structured as closely as possible to the framework for the regional assessments currently being finalized within IPBES. The report highlights environmental differences and similarities in the Nordic coastal areas, like the inhabitants´ relation to nature and the environment as well as similarities in social and policy instruments between the Nordic countries. This study provides background material for decision-making and it is shown that Nordic cooperation is of great importance for sustainable coastal management and should be strengthened in future work.

  • Andersson, Robin
    et al.
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
    Burman, Anton
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
    Hellström, J. Gunnar I.
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
    Andreasson, Patrik
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics. Vattenfall Research and Development, Älvkarleby.
    Inlet Blockage Effects in a Free Surface Channel With Artificially Generated Rough Walls2018In: Proceedings of the 7th IAHR International Symposium on Hydraulic Structures / [ed] Daniel Bung ; Blake Tullis, 2018, p. 723-732Conference paper (Refereed)
    Abstract [en]

    When considering free surface flow in channels, it is essential to have in-depth knowledge about the inlet flow conditions and the effect of surface roughness on the overall flow field. Hence, we hereby investigate flow inside an 18m long channel by using Particle Tracking Velocimetry (PTV) and Acoustic Doppler Velocimetry (ADV). The roughness of the channel walls is generated using a diamond-square fractal algorithm and is designed to resemble the actual geometry of hydropower tunnels. Four different water levels ranging from 20 to 50cm are investigated. For each depth, the inlet is blocked by 25 and 50% at three positions each, at the centre, to the right and to the left in the flow-direction. The flow is altered for each depth to keep the flow velocity even throughout the measurements. PTV is applied to measure the velocity of the free water surface; four cameras are placed above the setup to capture the entirety of the channel. The results show a clear correlation between roughness-height and velocity distribution at depths 20-30 cm. The surface roughness proved effective in dispersing the subsequent perturbations following the inlet blockage. At 50cm, perturbations from the 50% blockage could be observed throughout the channel. However, at 20cm, most perturbations had subsided by a third of the channel length. The ADV was used to capture the velocity in a total of 375 points throughout the channel, at a depth of 50 cm with no inlet perturbations.

  • Martinez, Jose
    Luleå University of Technology, Department of Engineering Sciences and Mathematics.
    Process optimization of simultaneous grinding of Hardmetal - Steel assemblies2018Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
  • Kristiansen, Pontus
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Postnikov, Roman
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Tillståndsövervakning av rullningslager med hjälp av E-näsa2018Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    At present, there is no standardized method of measuring a device's condition with thehelp of odors. In condition monitoring of rolling bearings, vibration measurement isthe most dominant method. In case of vibration measurement, temperature monitoringis used in some cases to get a better insight into the condition of the bearing. In thiswork, it is investigated whether an electronic nose can determine the condition of arolling bearing.Before any measurements began, an electronic nose is assembled in a housingconsisting of a circuit board, metal oxide sensors and a fan for stearing odors with aconstant flow towards the sensors. The electronic nose is controlled by an ArduinoNano which is a microcontroller. In addition to the e-nose, a unit is connected to twotemperature sensors and a humidity sensor controlled by an Arduino UNO. The unit'spurpose is to monitor the status and to look for any kind of correlation with the e-nosein case of any possible findings. Destructive specimens of ball bearings are performedto see if the e-nose responds prior to a bearing failure. Tests are conducted in an openand closed environment and three different oils are used to lubricate the bearings.This to see if the e-nose acts differently depending on the oil that is used. Aninvestigation is conducted if the electronic nose can separate the three different typesof oils that is used in the destructive bearing tests. To evaluate the measurementresults, Excel and Minitab are used, where principal component analysis is performedon all measurement data. After all bearing tests have been performed, a follow-up ofthe rolling bearings condition is performed, this through an optical microscope.The report shows that using the PCA analysis method, it appears that the electronicnose could distinguish between hydraulic oil, engine oil and gear oil. In the PCA forthe different measurement series the results did not become identical, but clusterdivisions became clear in all measurement series. Completed study showed that withthese bearing failures and temperatures, it is not possible to determine the condition ofthis ball bearer using an electronic nose. Because the specific gas sensors used for thee-nose did not give any kind of impact during the measurements. On the other hand,the electronic nose responded to a total failure of a ball bearing, which is too late in apreventative maintenance perspective. Therefore, the electronic nose cannot be usedfor condition monitoring of the specific ball bearing used in this study.

  • Bergman, Stina
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Livscykelanalys för grundläggning av byggnader: Användningen idag och hur metoden kan tillämpas i praktiken2018Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Today, the building sector accounts for a large part of greenhouse gas emissions during the production ofbuilding materials and the use of construction machinery during the construction phase. The national goalis that Sweden, as a country, will be carbon neutral country in 2045. Based on this goal, Fossilfri Sverige,together with a large number of companies from the building and civil engineering sector, has developeda plan of action for the industry's climate neutrality. Foundations account for a significant part of the totalcarbon footprint of building and in order to reach the goal of a climate neutral Sweden in 2045, it isimportant that disciplines working with ground foundations, begin to develop and optimize foundationconstructions to reduce the carbon footprint.

    In this master thesis, an interview study has been conducted to map which aspects affect the choice offoundation methods today, based on the contractor and the consultant's perspective, and map how theseactors use life cycle assessment (LCA) in foundations of buildings. A case study has been conducted toinvestigate how life cycle assessment can be used to calculate and compare carbon footprint and primaryenergy use from two foundation methods, by using and evaluating two digital LCA tools.

    A literature study has been conducted to find knowledge about foundation of buildings and to create anunderstanding of the climate impact from the building sector and the climate requirements in the buildingindustry. The choice of the two digital LCA tools used in the case study and the creation of the interviewguide is based on the literature study. The interviews have been conducted with employers fromconsultant and contractors who have varied experience and knowledge about life cycle assessment offoundations. In addition, a case study has been conducted in which a comparative life cycle assessment isexecuted for two foundation methods, pile foundation and compensated foundation, by using two digitalLCA tools, Klimatkalkyl 6.0 and BM 1.0. The LCA study is based on the limitations of the tools, consideringonly the first part of the life cycle; the construction phase (module A1-A5). Klimatkalkyl 6.0 calculatescarbon footprint and the primary energy use, and BM 1.0 calculates carbon footprint.

    The results of the interviews indicate that founding methods are often selected based on economicaspects, but also on personal experience, geographical location and tradition. The respondents mentionthat when climate and environmental requirements occur in projects, they are often unclear and difficultto understand. The interview study indicates that the use of LCA is limited. According to the respondents,the use of LCA would increase by improved knowledge about the method, by simplifying the LCA modelbut above all if their clients clarified the climate requirements.

    In the case study, the two tools show different climate impacts for the respective foundation method anddiverse differences in the comparison of the two foundations. Both tools show that foundation with pilefoundation gives a lower climatic impact than compensated foundation, during the construction phase.The difference between the foundation methods is 2 or 5 tonnes of carbon dioxide equivalents dependingon the tools, which corresponds to approximately 13 and 23 percent, respectively. Both tools also showthat concrete, styrofoam and steel are the building components that carry the largest part of the totalclimate impact for each foundation method.

    None of the tools, Klimatkalkyl 6.0 or BM 1.0, are developed specifically for the foundation of buildings,and in both tools there are building components missing that are included in the foundation methodswhich are studied in the case study. The result report from the respective tools is also difficult to interpretand should be developed. In spite of this, the conclusion is that both tools can be used as an aid tocalculate and show which foundation option will generates the lowest carbon footprint.

    As the economic factors today affects the choice of foundation method, this parameter can be used as ameans of increasing work on climate-adapted solutions. Proposals for further studies are to establish arelationship between costs and climate impacts for foundations and to investigate how to implement andincrease the use of life cycle assessment on a design level.

  • Engman, Dennis
    et al.
    Luleå University of Technology, Department of Engineering Sciences and Mathematics.
    Åström, Simon
    Luleå University of Technology, Department of Engineering Sciences and Mathematics.
    Konceptframtagning av utstötarbord2018Independent thesis Basic level (professional degree), 180 HE creditsStudent thesis
    Abstract [en]

    Metso Ersmark develop and manufacture rubber liners for mining mills. When making these rubber liners, large molds are placed in the furnaces. The molds are filled with rubber and metal parts which then are vulcanized together under pressure and heat. When the vulcanize process is completed, the mold is taken out on a so-called ejection table. The table has the task of pushing out the details of the molds using jacks and placing the molds at an ergonomic working height for the production staff before and after the vulcanization process.

     

    The aim of this graduation project is to develop a concept on a table with lifting device to reach the upper floor of the production furnace, a locking function of the ejection table when pressing out the rubber liner and increase the stroke length of the ejector function. Today there is two already existing ejection tables in Metso's production that are useful for this project,  12-54 and 12-39. These have been sources of inspiration for this work and a CAD model of 12-54 has been the basis for the final result.

     

    The concept was modeled in Inventor and calculations were performed to ensure the strength. The result was a table similar to 12-54 but with a longer stroke on the ejector function, wider table surface to enable a scissor lift, scissor lift as a lifting device and locking in the bottom position to relieve the scissor lift during loosening of the rubber lining. The goal in this project was reached, except that calculations was not made for the table lifting device. A concept of a scissor lift adapted for the table was drafted for a visual result, but detailed job to ensure its function was not made.

    Metso Ersmark develop and manufacture rubber liners for mining mills. When making these rubber liners, large molds are placed in the furnaces. The molds are filled with rubber and metal parts which then are vulcanized together under pressure and heat. When the vulcanize process is completed, the mold is taken out on a so-called ejection table. The table has the task of pushing out the details of the molds using jacks and placing the molds at an ergonomic working height for the production staff before and after the vulcanization process.

     

    The aim of this graduation project is to develop a concept on a table with lifting device to reach the upper floor of the production furnace, a locking function of the ejection table when pressing out the rubber liner and increase the stroke length of the ejector function. Today there is two already existing ejection tables in Metso's production that are useful for this project,  12-54 and 12-39. These have been sources of inspiration for this work and a CAD model of 12-54 has been the basis for the final result.

     

    The concept was modeled in Inventor and calculations were performed to ensure the strength. The result was a table similar to 12-54 but with a longer stroke on the ejector function, wider table surface to enable a scissor lift, scissor lift as a lifting device and locking in the bottom position to relieve the scissor lift during loosening of the rubber lining. The goal in this project was reached, except that calculations was not made for the table lifting device. A concept of a scissor lift adapted for the table was drafted for a visual result, but detailed job to ensure its function was not made.

    Metso Ersmark develop and manufacture rubber liners for mining mills. When making these rubber liners, large molds are placed in the furnaces. The molds are filled with rubber and metal parts which then are vulcanized together under pressure and heat. When the vulcanize process is completed, the mold is taken out on a so-called ejection table. The table has the task of pushing out the details of the molds using jacks and placing the molds at an ergonomic working height for the production staff before and after the vulcanization process.

     

    The aim of this graduation project is to develop a concept on a table with lifting device to reach the upper floor of the production furnace, a locking function of the ejection table when pressing out the rubber liner and increase the stroke length of the ejector function. Today there is two already existing ejection tables in Metso's production that are useful for this project,  12-54 and 12-39. These have been sources of inspiration for this work and a CAD model of 12-54 has been the basis for the final result.

     

    The concept was modeled in Inventor and calculations were performed to ensure the strength. The result was a table similar to 12-54 but with a longer stroke on the ejector function, wider table surface to enable a scissor lift, scissor lift as a lifting device and locking in the bottom position to relieve the scissor lift during loosening of the rubber lining. The goal in this project was reached, except that calculations was not made for the table lifting device. A concept of a scissor lift adapted for the table was drafted for a visual result, but detailed job to ensure its function was not made.