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  • 1.
    Akerlund, Matilda
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Avdelningen för datateknik och informatik.
    Alaranji, Louai
    Jönköping University, Tekniska Högskolan, JTH, Avdelningen för datateknik och informatik.
    A dynamically adaptive Bluetooth system: Improving the range of Bluetooth classic 4.2 using Forward Error Correction2023Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Wireless technology has increased in popularity since its invention, being embedded in many devices, such as smartphones, laptops, earphones etcetera. One of those technologies is Bluetooth, which is a short-range technology that is widely used worldwide. While being a popular and important technology, it is not as optimized as it could be, especially the standard Bluetooth 4.2. According to (Bluetooth, 2023)Bluetooth version 5 has four times the range of Bluetooth version 4.2 which is one area of improvement in Bluetooth. While limited Forward Error Correction (FEC)functionality in terms of (15,10) Hamming codes is present in the Bluetooth classic4.2 stack, however, it is not utilized in that version of Bluetooth. This thesis aims to implement a functionality in Bluetooth that uses FEC to increase the range. Before the experiments were conducted, multiple measurements were done in order to check if the hardware, such as the Bluetooth modules, antennas, air sniffer, could provide reliable and valid data. The experiments were conducted by streaming an audio sample of 48 kHz via Bluetooth and increasing the range until a certain percentage of fail rate in data transmission has occurred. FEC was then enabled, and the same experiment was repeated. The results from the experiments show that the range can be increased up to a few meters. Not only that, but the transmission without FEC allows a high level of errors without a connection cut-off. With FEC, the connection does not allow high levels of errors which means that the audio quality would not drop as low as it would have without FEC which means that a certain audio quality is preserved. This also makes the case for the implementation of higher modes of FEC into the Bluetooth stack to potentially increase the range of Bluetooth classic multiple times, but that implementation is beyond the scope of this thesis. 

    Fulltekst (pdf)
    fulltext
  • 2.
    Amin, Skorupan
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Datateknik och informatik.
    Eyetracking som interaktions-hjälpmedel i fordon: Utveckling och utvärdering av ett ögonstyrt infotainmentsystem2018Independent thesis Basic level (degree of Bachelor), 12 hpOppgave
    Abstract [en]

    The purpose of this study was to develop and evaluate a new eye-controlled infotainmentsystem that worked differently compared to similar systems. What differs this new system is that personal calibration is not necessary to be performed before each time the system is to be used.

    The method Design Science Research (DSR) has been used where an artifact has been developed and then investigated. Experiments have been conducted to find out how well the infotainment system works when it uses a relative gaze towards an absolute, but also to find out how users should confirm their gaze in the best way. For confirmation of gaze, three different methods have been used; button press, blink, and gazing. The collected data from the experiments have been matched to evaluate how well they stand against each other.

    The result of the study shows that when the infotainment system used relative gaze, it worked in as many attempts as it did using absolute. The result times were very similar to each other which shows that the both methods works well even when face calibration is not used, but the collected data was uneven which made it difficult to draw conclusions about which one was faster. The study also shows that keystroke was the best-suited method to use to confirm gaze.This method was much faster than other methods.

    A limitation of the study has been that data collection was only done on two occasions. On more occasions more data could have been generated, which would have made it easier to draw more conclusions about the response times.

    Fulltekst (pdf)
    fulltext
  • 3.
    Andersson, Elsa
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Avdelningen för datateknik och informatik.
    Strömland, Moa
    Jönköping University, Tekniska Högskolan, JTH, Avdelningen för datateknik och informatik.
    Quassdorf, Catherine
    Jönköping University, Tekniska Högskolan, JTH, Avdelningen för datateknik och informatik.
    Microinteractions: Don’t forget to raise your hand!: A qualitative study concerning microinteractions in digital meeting platforms and the impact they have on workflow efficiencies in the creative industry.2021Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    This research paper studies the extent of how microinteractions are utilized in Microsoft Teams and the impact that they have on workflow efficiencies, specifically in the creative industry. In a novel time where Covid-19 virus has increased the demand of digital platforms, the importance of research within remote meeting utilization, and the interaction possibilities within, is of utter importance. Also, since we are missing out on the spontaneous interactions that occur when meeting face-to-face, the microinteractions within digital meeting platforms now carry a heavier weight when interactions are solely occuring remotely.

    The data collection was achieved through a qualitative approach consisting of participant observations and semi-structured interviews. The results of this research proved that microinteractions are used frequently within digital meetings in Microsoft Teams, but in different contexts and in different constellations. The results also identified that microinteractions, which hold the right conditions, can streamline workflows in certain scenarios. This study concluded in interesting data that answered the research questions but also opened up for further research due to the topic being of a novel field and in a special time, in this case referring to the pandemic and Covid-19.

    Fulltekst (pdf)
    microinteractions
  • 4.
    Anhammer, Ida
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell organisation och produktion.
    Asp, Rebecca
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell organisation och produktion.
    Informationssystemets inverkan på SMF i logistikbranschen: Fallstudie på Pallservice Renova Syd AB2018Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Purpose – The aim of the study is to identify, from an operational and strategic perspective, the impact of a digital information system on SME in the logistics industry.Based on the purpose of the study, two questions have been formulated.

    • What effects can a digital information system provide on an information flow at an operational level?• What strategic benefits can a digital information system give?

    Method – A case study has been conducted on a small logistics company that manages, repairs and manufactures pallets. The data collection was conducted through interviews and observations. Based on the data collection, a literature study has been conducted where an inductive approach has been used. A comparison and analysis between the literature study and empirical data has generated the results of the study.

    Findings – With regards to operational and strategic perspective, a digital information system may have different types of impact on SMEs. From an operational perspective, a digital information system can have the following effects:• Operations can be reduced• Reduction of lead time• Enables increased quality of information and information may be available in real time• Creates prerequisites for forecasts, which in return creates a good basis for planning and decision making

    The benefits identified at a strategic level of implementing a digital information system are:• Competitive advantage• Decision can be taken based on correct information• Creates new opportunities• Better customer relations

    Implications – This study highlights the impact of digitization on companies and provides evidence that digitalization of information systems can lead to shorter lead times, reduced documents and safer information in the flows. The study's findings reinforce and confirm the existing theories that a digital information system can help a company to create more effective processes and a smoother management of its information. The case company illustrate a problem that more logistics companies may experience and where an information system can be a solution for easier management and more up-to-date information.

    Limitations – The purpose of the study is to investigate a company's information flow linked to a specific product category. The economic aspects of information management are not considered in this study.

    Fulltekst (pdf)
    fulltext
  • 5.
    Bäck, Anton
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Avdelningen för datateknik och informatik.
    Bozic, Boris
    Jönköping University, Tekniska Högskolan, JTH, Avdelningen för datateknik och informatik.
    Hardware interfaces in embedded systems: A study on simulating hardware interfaces using software2023Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Fulltekst (pdf)
    fulltext
  • 6. Davidsson, Robin
    et al.
    Sjölander, Fredrik
    Analogue meters in a digital world: Minimizing data size when offloading OCR processes2022Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Abstract [en]

    Introduction: Instead of replacing existing analogue water meters with Internet of Things (IoT) connected substitutes, an alternative would be to attach an IoT connected module to the analogue water meter that optically reads the meter value using Optical Character Recognition (OCR). Such a module would need to be battery-powered given that access to the electrical grid is typically limited near water meters. Research has shown that offloading the OCR process can reduce the power dissipation from the battery, and that this dissipation can be reduced even further by reducing the amount of data that is transmitted. 

    Purpose: For the sake of minimising energy consumption in the proposed solution, the purpose of the study is to find out to what extent it is possible to reduce an input image’s file size by means of resolution, colour depth, and compression before the Google Cloud Vision OCR engine no longer returns feasible results.  

    Method and implementation: 250 images of analogue water meter values were processed by the Google Vision Cloud OCR through 38 000 different combinations of resolution, colour depth, and upscaling. 

    Results: The highest rate of successful OCR readings with a minimal file size were found among images within a range of resolutions between 133 x 22 to 163 x 27 pixels and colour depths between 1- and 2-bits/pixel. 

    Conclusion: The study shows that there is a potential for minimising data sizes, and thereby energy consumption, by offloading the OCR process by means of transmitting images of minimal file size. 

    Fulltekst (pdf)
    Analogue meters in a digital world
  • 7.
    Eriksson, Carl-Oscar
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell organisation och produktion.
    Tornberg, Jesper
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell organisation och produktion.
    Värdeflödesanalys i ett råmaterialflöde: En fallstudie där icke-värdeskapande aktiviteter och dess orsaksfaktorer identifieras2019Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Syfte – Studiens syfte är att utifrån en värdeflödesanalys kartlägga ett råmaterialflöde samt identifiera icke-värdeskapande aktiviteter och föreslå förbättringsförslag. För att besvara syftet har det brutits ned i tre följande frågeställningar: Vilka icke-värdeskapande aktiviteter kan identifieras i flödet? Vad finns det för argument till att åtgärda de upptäckta icke- värdeskapande aktiviteterna Hur kan de upptäckta icke-värdeskapande aktiviteterna åtgärdas för att höja effektiviteten?

    Metod - Den genomförda studien är en fallstudie vilken bygger på en induktiv ansats med kvantitativa inslag. Den använda metoden är av kvalitativ karaktär då studien grundar sig på intervjuer och tolkning utifrån observationer av den grundläggande datainsamlingen. Datainsamlingen har genomförts utifrån litteraturstudier, intervjuer, observationer och dokumentstudier. För att nå en hög trovärdighet har det vid utformning av intervjufrågor varit viktigt att dessa kunnat kopplats till uppfyllnad av syftet. Detta arbete gjordes för att minimera risken för systematiska fel.

    Resultat – Studiens resultat bygger på en kartläggning av ett flöde där en nulägesanalys genomfördes för att sedan genomföra en värdeflödesanalys. Utifrån värdeflödesanalysen framgick det att en brist i flödet var höga nivåer av slöserier. Det största identifierade slöseriet var bristande kvalité, främst orsakat av produktion av defekta produkter. Denna brist påverkar vidare stora delar av flödet. De åtgärdsförslag vilka läggs fram i studien är att via en förändring av kulturen på företaget, genomföra standarder och vidare jobba med ständiga förbättringar.

    Implikationer – Resultatet visar vikten av att arbeta med effektivisering av slöserier vilket i studiens fall leder till bristande kvalitet främst i form av produktion av defekta produkter. Studien har ett praktiskt bidrag till tillverkande företag, genom att ta till sig de presenterade åtgärdsförslagen kan det generera en bättre samsyn på kvalitet i verksamheten. Även ett teoretiskt bidrag ges i form av att ämnet ständigt är under utveckling och behöver ny uppdaterad data. Vidare forskning skulle kunna se över hur man rent tekniskt och psykologiskt implementerar en förändring likt denna.

    Begränsningar – Resultatet kan vara svårt att generalisera eftersom detta är en studie genomförd som en enfallsdesign. Vidare är det även komplext att undersöka och utveckla en studie vilken visar på hur kvalitet är kopplat till företagskultur.

    Fulltekst (pdf)
    fulltext
  • 8.
    Gustafsson, Viktor
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Avdelningen för datavetenskap.
    Ottosson, Per
    Jönköping University, Tekniska Högskolan, JTH, Avdelningen för datavetenskap.
    Multiplexing NFC Antennas: An evaluation of the technique and its limitations2023Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Introduction

    This study aims to investigate the possibility of driving multiple NFC antennas with a single NFC-controller by using a multiplexer. An artifact was developed and experiments were conducted in order to evaluate the design choice and in addition, to observe the impact of a multiplexer in an NFC system with respect to the number of successful tag detections, bit error rate (BER), the utilization of automatic antenna tuning (AAT) and the physical distance to the NFC tag. Data collected from the experiments was analyzed, and the results were discussed. The purpose of the thesis was concretized by formulating three research questions:

    [RQ1] How can the design proposed in the problem statement be implemented?

    [RQ2] How does the multiplexer impact the system’s ability to detect an NFC tag and read its contents at different distances?

    [RQ3] To which degree does the AAT-technology compensate for the issues caused by the multiplexer?

    Method

    This research has been conducted according to the design science research (DSR) methodology. DSR is a well-established methodology and suits the nature of this research, therefore it is used to answer the research questions.

    Findings

    The thesis demonstrates a viable solution using a multiplexer in NFC systems, with reduced detection distance as a factor to consider. The impact of AAT remains inconclusive, requiring further research.

    Implications

    This study shows that using a multiplexer in NFC systems can save costs and space, leading to more affordable and compact devices. It enables scalable, advanced NFC devices for diverse applications, encouraging wider adoption. However, developers must consider the impact of a multiplexer on detection distance when designing NFC-based applications

    Limitations

    This study has certain limitations. It focuses on a particular multiplexer and NFC antenna type, and specific testing conditions. It does not delve into the potential profitability, diverse applications, security or encryption concerns, compatibility with other devices, compliance with regulations, or hands-on verification of part connectivity.

    Fulltekst (pdf)
    fulltext
  • 9.
    Gustavsson, Josef
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Aktiesammanställare med teknisk analys och simulation2013Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Websites today only offer simpler form of technical analysis and are not fun to use, therefore student decided to build a website that makes technical analysis a bit more fun by giving user possibility to experiment with settings for technical indicators and also see clear visible results from analysis. Student decided to build website in ASP.NET. Technical indicators for this project only consist of those who give buy and sell-signals via cross-over, no divergence or pattern finding.This project has three questions that define this project. It’s important that there is good functionality so that performing an analysis is perceived as simple, one question is therefore; what functionality for website is needed in order for analysis to be perceived as more simple?Technical analysis is a pretty complex subject and demands an interface that is perceived as easy to understand and easy to use, it’s therefore important that the interface is well designed, second question is therefore; how should the interface be designed to be user-friendly?When systems grow large they often become hard to develop and later on unmaintainable because of the accumulated complexity and dependency between classes, the code is a mess, the last question is therefore; how can the systems complexity be eased with object-oriented design principles?Jakob Nielsens ten heuristics for User Interface Design were used as inspiration for designing the interface for the website. The system design follows SOLID principles, some pattern-design were also used because pattern-design often fulfills SOLID principles or makes for pretty good solutions in regular code-problems.At the beginning of the project the student did a small research to find out what was needed in order to complete project. Work-method for project follows agile development where decisions were made on a weekly basis. The project was divided into three phases where each phase was strongly coupled to a specific area of responsibility. Prototypes for interface were made and used as a basis for the resulting interface.The project led to a working website with good functionality. Filter was considered as important in order to ease shaping of analysis because the user could more easily sort and pick stock. The student assumed that the user would want fast and easy access to their stock so portfolio management were implemented so that user could more easily get to stock that was considered as favorites. The interface follows to a big extent Jakob Nielsens ten heuristics for User Interface Design and is proven by comparing interface with principles. The same goes for design of the system, design is proven by comparing with principles, still to this day system is considered easy to continue development.Student made the conclusion that SOLID principles were very important in order for the system to maintain its health and took experience from these principles. Student became happy with the interface but more focus could’ve been given for a more interactive interface because it might’ve been perceived as more intuitive.

    Fulltekst (pdf)
    Aktiesammanställare med teknisk analys och simulation
  • 10.
    Hsertawbu, Naw Michey Hsalehleh
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Avdelningen för datateknik och informatik.
    Sabbagh, Marwa
    Jönköping University, Tekniska Högskolan, JTH, Avdelningen för datateknik och informatik.
    Trådlösa tekniker i tidskritiska system: En experimentell jämförelse mellan Zigbee 3.0 och Bluetooth Low Energy 5.22021Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Examensarbetet genomfördes tillsammans med företaget Rol Ergo. Syftet med studien var att analysera Zigbee 3.0 och Bluetooth Low Energy 5.2 och deras lämplighet i tidskritiska system genom att studera latensen och förhållandet mellan signalstyrkan och avståndet mellan de två kommunikationsprodukter. Datainsamlingen genomfördes med en experimentell studie och utifrån kunskap som framskaffats har ett visst antal bestämda experiment utförts för att svara på frågeställningarna som ställs. 

    Datainsamlingen visar att både maxlatensen och typiska latensen hos Zigbee är lägre än maxlatens och typiska latens för Bluetooth Low Energy. Datainsamlingen för signalstyrkan visar att Bluetooth Low Energys signalstyrka blir mer påverkad av avståndet mellan kommunikationsprodukterna än vad Zigbees blir. Det visar även att den optimala förhållande mellan signalstyrkan och avståndet hos Zigbee är bättre än hos Bluetooth Low Energy. 

    Slutsatsen av arbetet är att Zigbee är mer lämpad för tidkritiska system än Bluetooth Low Energy då låg latensen prioriteras. Zigbee är även mer lämpad då lång distansen prioriteras men då bör signalstyrkan ligga runt -50dBm. Bluetooth Low Energy är dock mer lämpad då lång distans inte prioriteras och signalstyrkan inte behöver vara utmärkt för att kunna kommunicera. 

    Begränsningarna för arbetet är att Bluetooth Low Energy och Zigbee endast har prövats på utvecklingskortet nRF5340 DK.  På grund av den begränsade tiden så har endast ett antal bestämda experiment som har föreslagits av rådgivare på Rol Ergo utförts.

    Fulltekst (pdf)
    fulltext
  • 11.
    Ippoliti, Elena
    et al.
    La Sapienza University of Rome.
    Meschini, Alessandra
    Univerity of Camerino.
    Moscati, Annika
    Architettura delle informazioni e Architrttura informatica sul caso studio di Appignano del Tronto2008Inngår i: DISEGNARECON, ISSN 1828-5961Artikkel i tidsskrift (Annet vitenskapelig)
    Fulltekst (pdf)
    fulltext
  • 12.
    Ippoliti, Elena
    et al.
    Sapienza University of Rome.
    Moscati, Annika
    Sapienza University of Rome.
    New means of knowledge: 3D, 3D-GIS and Web GIS2010Inngår i: XIII International Congress of Architectural Graphic Expression, Valencia, May 27th to 29th, 2010., Valencia, Spain, 2010Konferansepaper (Fagfellevurdert)
    Fulltekst (pdf)
    fulltext
  • 13.
    Johansson, Alfred
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Datateknik och informatik.
    Bluetooth IPS med en mottagare och Kalmanfiltrering2019Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    This study aims at investigating a central mounted Indoor Positioning System based onBluetooth RSSI values and Kalman filtering where the Bluetooth module is mounted on arotating arm around an axle. The purpose is to investigate how the length of the arm and therotational speed influence on the possible positioning accuracy of the artefact. As requested bythe company Combitech AB, the artefact will also be evaluated whether the design is areasonable alternative to de most common Bluetooth based Indoor Positioning Systems. Thecase study is performed using design science as an artefact is developed and evaluated. Theartefact is tested in a predetermined test environment, in this case an office room. In the testenvironment, measurements will be realized on the different iterations of the artefact. Theresult of the study is the achieved positioning accuracy for the artefact in two and threedimensions. Linear equations describing the relationship between the length of the arm andthe achieved accuracy of the artefact will also be proposed. The best accuracy achieved in twodimensions was 510 centimeters. The best achieved accuracy in three dimensions was 730 centimeters. The observed relationship between the length of the arm and the uncertainty ofthe trilaterated position is that when the length of the arm increases the uncertainty decreasesin both two and three dimensions.

    Fulltekst (pdf)
    fulltext
  • 14.
    Johansson Enell, Lina
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Datateknik och informatik.
    Hoffman, Emelie
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Datateknik och informatik.
    Den ständiga kampen mellan serif och sans serif: Typografins digitala utveckling2016Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Detta examensarbete är en del av utbildningen Kandidatpåbyggnad med inriktning Informatik som är ett påbyggnadsår för Grafisk design och webbutveckling på Jönköping University: School of Engineering.

    Vid en snabb granskning av hemsidor idag går det enkelt att se att det är dominerande att använda sans serif-typsnitt både till rubriker och i brödtext. I grafiska utbildningar lärs det ut att för bäst läsbarhet bör serifer användas i brödtext. Syftet med examensarbetet var att undersöka vad som påverkar läsbarheten på en digital skärm och varför det inte är vanligare att använda serifer på en webben, med tanke på hur långt tekniken kommit idag med nya högupplösta skärmar som inte borde påverka användningen av serifer. Syftet var även att undersöka om val av typografi idag alltid baseras på typografiska regler.

    Resultatet visade att ett serif-typsnitt upplevs som mer lättläst än ett sans serif-typsnitt oberoende på om de läses på en digital skärm eller på ett tryckt papper. Resultatet visade även att dominationen av sans serif-typsnitt på webben beror på en vana som hänger kvar sen förr, men att detta troligen kommer att förändras i framtiden.

    Det finns geografiska begränsningar i arbetet, då examensarbetet endast undersöker södra Sverige. För att öka validiteten kunde representanter från hela Sverige ha deltagit. Det hade kunnat påverka och förändra resultatet. Undersökningen hade kunnat förbättras generellt genom att utveckla den och använda fler typsnitt, för att få ett tydligare svar på frågeställningen den undersökte. Även detta hade kunnat påverka resultatet till något annat.

    Fulltekst (pdf)
    fulltext
  • 15.
    Johansson, Kevin
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Avdelningen för datavetenskap.
    Eklund, Christoffer
    Jönköping University, Tekniska Högskolan, JTH, Avdelningen för datavetenskap.
    A comparison of energy usage between LoRa 433Mhz and LoRa 868MHz2021Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    The number of devices connected to the internet is constantly increasing and therefore putting more weight on the importance of low energy usage. LoRa which is the physical part of the LoRaWAN communication protocol that this paper focuses on is popular in the area of IoT because of its low energy usage. The purpose of this paper was to find out how the energy usage differentiate between two of the most commonly used LoRa frequencies 433MHz and 868MHz.

    LoRa is often used with battery driven components within IoT such as temperature or humidity sensors. It is of great importance to keep the maintenance cost for these devices to a minimum. And it is therefore important to find the most energy efficient solutions for communication between LoRa components.

    To get an answer from the purpose of this paper, two questions were formulated, and they were in turn answered by using an experimental research method. For the experiment, two devices were set up using: one transmitter combined with a current sensor and one receiver, both of which were capable of using either LoRa 433MHz or 868MHz. The experiment was then conducted by transmitting 1000 packages for every DR and both of the frequencies.

    The results were analysed in an empirical quantitative way which showed that the higher frequency of 868MHz consumed more energy in all of the experiments. One discovery that was quite interesting was that the difference could be mitigated by using different data rates.

    The result in this paper is intended to increase the knowledge regarding LoRa and its energy usage. This papers result can be used as a reference when choosing between what frequency and data rate to use when working with LoRa.

    Fulltekst (pdf)
    fulltext
  • 16.
    Johansson, Sonny
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    “Bring your own device” i svenska företag och organisationer2014Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Most companies and organizations today depend on technology connected to the Internet. Schools and offices have therefore been providing computers, phones and other technology to the employees. The recent technological development and decline in prices for technology have contributed to making these products a part of everyday life for most people. This has made it very common for employees and students to bring their own devices into school and workplaces.

    The aim of this study is to define what "Bring your own device" means for Swedish companies and organizations and how it has been implemented in those. The aim is not mainly to generalize to all Swedish companies but create an understanding how the trend is used to provide a basis for continued research in this area. The questions this thesis aims to answer is:

    1. What does the term "Bring your own device" mean in the Swedish organizations and companies in which it is implemented?
    2. How is "Bring your own device" implemented in Swedish organizations and companies?
    3. What are the policies and guidelines for the Swedish organizations and companies that have implemented "Bring your own device", and how is compliance?

    A pragmatic approach has been used to incorporate previous studies while keeping the interview questions open to new approaches. The structure has been small-N studies that go deep into a number of cases, in order to more profoundly explain a phenomenon. Mail interviews have been used to collect data from the persons responsible for "Bring your own device" in the different organisations.

    The result shows that companies see "Bring your own device" as a trend where employees bring their own devices rather than firms providing employees with devices that they use privately. Respondents have not measured or examined how the introduction of BYOD has affected productivity. It seems, like in foreign studies, to be a lack of clear policies and guidelines regarding the phenomenon.

    Fulltekst (pdf)
    byodiswcoaor2014
  • 17.
    Kaidalova, Julia
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Informationsteknik.
    Kaczmarek, Tomasz
    Poznan University of Economic, Department of Information Systems.
    Seigerroth, Ulf
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Informationsteknik.
    Shilov, Nikolay
    St Petersburg Institute for Informatics and Automation of RAS.
    Semantic Web Technologies in Business and IT Alignment: Multi-Model Algorithm of Ontology Matching2013Inngår i: Fifth International Conference on Advances in Future Internet (AFIN 2013) / [ed] Davoil, R., Curran Associates, Inc., 2013, s. 50-57Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The importance of using appropriate and effective IT means to facilitate business functions have been acknowledged and discussed by practitioners and scientists over the past two decades thus giving a rise to the Business and IT alignment (BITA) problem. In BITA, the issue of sharing and processing large amounts of information from distributed and heterogeneous sources is of significant importance. Ontologies have shown their usability for this type of tasks. However, they also bring new challenges. The paper proposes utilising of the Semantic Web technologies to assist in solving them. Namely, the paper describes application and adaptation of the ontology matching algorithm for the BITA problem. The algorithm integrates different matching models. Its operation is shown via an illustrative example.

  • 18.
    Kara, Dilen
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Datateknik och informatik.
    Jalil, Zaid
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Datateknik och informatik.
    IoT-nätverk baserade på LoRaWAN: Informationskvalitet i LoRaWAN2018Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    The Internet was initially built around networks based on physical cables, the next step to improve the accessibility of the Internet came with the introduction of wireless communication. the next step to improving accessibility to the Internet came with the introduction of wireless communication. Because the IoT products are wirelessly connected, they need an internal power source in the form of a battery. Many of the existing communication protocols are therefore not suitable for IoT solutions because they are power consuming. Alternatives to these communication protocols have therefore been developed, for example LTE-M, NB-IoT and LoRaWAN.

    The study was conducted in cooperation with Etteplan. Etteplan want to invest in LoRaWAN and thus want to gain deeper knowledge within LoRaWAN. Thus, it was chosen to investigate how different factors affect the signal strength transmission time in a LoRaWAN. The focus of the study has thus been on the communication between an IoT node and a receiver in a LoRaWAN, thus the purpose of the study:

    To show how different data rates, distances and environments affect the quality of information sent from an IoT node to a receiver in LoRaWAN.

    Design science research was used as a research method, in design science research an artefact is constructed and then studied. In this study, a LoRaWAN was constructed and the communication between an IoT node and receiver in this LoRaWAN was studied. To study the communication between the IoT node and the receiver, two experiments were performed. The experiments were performed simultaneously where the difference was in the data collected, one experiment collected the signal strength and the second the transmission time. The experiment was conducted in two different environments, one with a clear view and one with blockages. In the experiment, the IoT node was positioned at different distances with different data rates.

    The result of the study shows how different data rates, distances and environments affected the quality of information between an IoT node and receiver and how they relate to previous research. Data rate was the factor that affected the quality of the information most. Data rate had minimal impact on signal strength, but great impact on number of lost data packet and transmission times. The two different environments had no effect on the transmission time, but the signal strength was over 10 dbm lower in the urban environment than with clear view. The distance had no effect on transmission time and minimal impact on signal strength.

    Fulltekst (pdf)
    fulltext
  • 19.
    Karlsson, Linda
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Dataöverföring mellan en mobiltelefon och en NFC-läsare2012Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Denna rapport handlar om att använda en trådlös kommunikationsteknik som kallas NFC (Near Field Communication) vid kommunikation mellan en Android mobiltelefon och en NFC-läsare som kallas ACR122U. Syftet med detta projekt är att:

    • Välja en Androidtelefon som har stöd för NFC.
    • Skapa en applikation som skall köras på Androidtelefonen och som skall skicka ett lösenord via NFC.
    • Skapa ett program som skall köras på en dator med operativsystemet Windows 7 och som skall hantera ACR122U.
    • Förklara den insamlade kunskapen i detta dokument så andra lättare skall kunna arbeta med NFC.

    Följande frågor kommer att besvaras i denna rapport:

    • Vilken Androidtelefon bör användas vid utveckling av en applikation som kan kommunicera via NFC?
    • Vad krävs vid utveckling av en applikation som kan kommunicera via NFC?

    Aktionsforskning är den forskningsmetod som användes vid sökandet efter svar på frågorna ovan. Detta innebär att forskningen görs genom att läsa om ämnet, genomföra en eller flera lösningar för att hitta en fungerande lösning och sedan dokumentera resultaten. Implementeringen av programvaran på mobiltelefonen genomfördes med mycket hjälp från Android Developers hemsida. Vid utvecklingen av den programvara som skall användas av datorn för att hantera ACR122U gjordes en hel del forskning. En demoapplikation och ett Javabibliotek som heter "nfctools" som är skapade av det Tyska GrundID GmbH var mycket användbara vid försöken att ta reda på hur kommunikationen fungerar. Programmet som hanterar ACR122U har utvecklats genom att växelvis läsa och testa olika lösningar.

    Den mobiltelefon som valdes under det här projektet är Samsung Galaxy Nexus som kör Android 4.0.Den programvara som hanterar ACR122U måste hantera dessa saker:

    • Skicka data via USB till ACR122U - Detta gjordes med hjälp av en klass som kallas "ModWinsCard" vilken kom med ett utvecklingspaket för NFC.
    • Ett ACR122U pseudo-APDU (Application Protocol Data Unit) kommando.
    • Några av ACR122U:s NFC-kontroller (PN532) kommandon.
    • Delar av NFC lagren: NDEF (NFC Data Exchange Format), SNEP (Simple NDEF Exchange Protocol) och LLCP (Logical Link Control Protocol).

    Det är viktigt att veta vilka NFC lager som finns implementerade i de enheter som skall kommunicera med varandra via NFC. Samma lager måste användas för att packa och packa upp data.

    Fulltekst (pdf)
    fulltext
  • 20.
    Käll, Nathalie
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell organisation och produktion.
    Fransson, Rebecca
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell organisation och produktion.
    Internet of Things påverkan på informationsflödet: En fallstudie på Saab Training & Simulation2018Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Syfte: Studien ämnar att studera hur Internet of Things skulle kunna integreras för att minska potentiella brister i informationsflödet hos tillverkande företag. För att möjliggöra detta formulerades två forskningsfrågor: 

    1. Hur är informationsflödet utformat hos ett tillverkande företag med högt anpassade kundprocesser? 

    2. Vilka möjligheter ger Internet of Things för att minska potentiella brister i informationsflödet? 

    Metod: En förundersökning gjordes för att ge författarna en bild av studiens problemområde. Vidare genomfördes en litteraturstudie och en fallstudie. Litteraturstudien skapade studiens teoretiska ramverk och innehåller områden som Internet of Things, information, kommunikation, informationsflöde och informationssystem. Fallstudien genomfördes på ett stort tillverkande företag och bestod av dokumentstudier, observationer och en fokusgrupp. En sammankoppling av studiens teoretiska ramverk och empiri genererade studiens resultat. 

    Resultat: Företagets informationsflöde visade sig vara komplext och innehålla mycket manuell hantering av information. Något som visade sig ge konsekvenser för informationens pålitlighet, relevans och tidsperspektiv. Det finns därför förbättringsmöjligheter genom att integrera Internet of Things, då en digitalisering av informationsflödet skulle kunna leda till standardiserade processer samt en större och säkrare mängd delad information. 

    Implikationer: Teoretiskt bidrar studien genom att utvärdera hur Internet of Things kan bidra till nya sätt att arbeta med informationsflöden hos tillverkande företag. Studien visar detta genom att analysera viktiga aspekter inom ett nuvarande informationsflöde och Internet of things. Praktiskt bidrar studien med att identifiera potentiella förbättringsmöjligheter i ett företags informationsflöde genom en integration av Internet of Things. 

    Begränsningar: Studien är designad som en enfallsstudie vilket begränsar generaliserbarheten. Andra företag kan komma att behöva undersöka sina specifika förutsättningar för att dra nytta av studien. Generaliserbarheten ökar till viss del då Internet of Things är ett brett ämne och kan appliceras på ett stort antal områden. För att öka studiens tillförlitlighet har metodkapitlet noggrant utformats och beskrivits. 

    Fulltekst (pdf)
    fulltext
  • 21.
    Lindeberg, Adrian
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Avdelningen för datateknik och informatik.
    Laihinen, Patrick
    Jönköping University, Tekniska Högskolan, JTH, Avdelningen för datateknik och informatik.
    Svenska internetoperatörers beslutsprocess kring val av Wi-Fi-Router: En kvalitativ intervjustudie2023Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    This study investigates how Swedish internet service providers (ISP) choose a Wi-Fi-Router for use by private customers. The study investigates the process of choosing a Wi-Fi-Router and what features the companies prioritize during the process. These features can be aspects such as security, speed, capacity, Wi-Fi standard and price. The study seeks to answer how the decision-making process is carried out in the companies, but also how the Wi-Fi-Routers features are prioritized during the decision-making process. 

    This was investigated using qualitative methods in the form of semi-structured interviews. The interviews were held remotely, which allowed for a larger spread of respondents. After the interviews, the data was coded using thematic analysis to arrive at the results of the study. 

    The study identified several different phases during the decision-making process that ISP’s go through. After identifying the phases, they were placed in a model which seeks to describe the decision-making process for all ISPs. 

    The most important aspect during the decision-making process was the price. The remaining aspects were decided by the Wi-Fi-Router's price and compromises had to be made to lower the price to a reasonable level for both the company and the customer. In addition to the price, the companies aimed to find a balance between the other features, where compromises can be made for features they consider to be less important.

    Fulltekst (pdf)
    fulltext
  • 22.
    Linderoth, Henrik
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Jacobsson, Mattias
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Elbanna, Amany
    School of Management, Royal Holloway University of London, Egham, UK.
    Barriers for digital transformation: The role of industry2018Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Limited attention has been paid to why certain industries, like the AEC (Architectural, Engineering and Construction), is lagging behind in digital transformation. The question can be raised if there are characteristics on industry level that constrain digital transformation? The aim of the paper is to explore how the interactions among four industry key actors; architects, clients, contractors and consultants shape industry characteristics and the options for digital transformation through adoption and use of digital technology. The aim will be achieved through a combination of individual- and focus group interviews with representatives of the key actor groups focused on how they perceive Building Information Modelling (BIM). It is concluded that the characteristics of the industry; the focus on practical day-to-day action, a heterogeneous client side who have difficulties in putting demands on contractors and sub-contractors due to lack of competencies, and a product that raise barriers for process innovations do effectively constrain digital transformation.

  • 23.
    Moregård, Jonathan
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Kristiansson, Johan
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Att skapa grunden tillkassasystemsapplikationer för Android: Undersökande arbete samtimplementation2013Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Abstract [en]

    This paper was made together withTechPay AB, by their request.

    The dissertation has been divided into two separate parts; one of which is fully theoretical, with the focus on the security requirements of a digital cash register, and how to meet these requirements.

    The second part covers the implementation of anAndroid-oriented Java-library,created with help from the security requirements found in the first part. The purpose of this library is to make it easier to develop a cash register that uses payment terminals from TechPay.

    This paper also covers different communication protocols, encryption techniques and recommendations from authorities, banks and Android. This paper also contains a small review of how users are validated in applications on the current market that handles money transactions.

    Fulltekst (pdf)
    Att skapa grunden till kassasystemsapplikationer för Android
  • 24. Moscati, Annika
    Sistemi informativi integrati per la valorizzazione del patrimonio urbano-architettonico, tra 3D GIS, AIS e Web2012Doktoravhandling, monografi (Annet vitenskapelig)
    Abstract [en]

    Currently in the field of management, enhancement, territory and cultural heritage analysis, two types of information systems offer significant tools: GIS (Geographic Information System) and AIS (Architectural Information System). The first one manages urban and territorial scale data, the second one administers architectural scale data. For a complete management and analysis of the built heritage, both scales (territorial-urban and architectural) are essential, but despite numerous attempts made in recent years, currently no system is really able to manage them simultaneously. After a thorough analysis of both types of systems, and a careful study of the state of the art, this research aims to create a hybrid system, which is a new interface that allows to simultaneously view an AIS, a GIS and a window for the management of spatial queries. Considering the deep differences between the two systems, the ultimate goal is to integrate them by proposing a new hybrid system (HS) to solve the problem of scale change (from analysis to synthesis) using a new data structure and a new interface.

  • 25.
    Nilsson, Adam
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Logistik och verksamhetsledning.
    Sandberg, Lukas
    Jönköping University, Tekniska Högskolan, JTH, Logistik och verksamhetsledning.
    Effektiv materialhantering vid godsmottagning: En fallstudie på ett svenskt tillverkande företag om förbättringsmöjligheter vid arbete med leverantörer2023Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Syfte – Processer inom och mellan företag måste integreras för att öka konkurrenskraften mot andra företag. Inköp av material har ett stort ansvar att knyta samman leverantörer och godsmottagningen för att ge materialhantering de mest fördelaktiga förhållandena. Godsmottagningen är den första aktiviteten för den interna materialhanteringen och skapar därför förutsättningar för fortsatt effektiv materialhantering nedströms försörjningskedjan. Därför är syftet med studien: att utforska förbättringsmöjligheter vid arbete med leverantörer för att skapa förutsättningar som främjar en effektivare materialhantering vid godsmottagning.

    Metod – Studiens design är en fallstudie. Empirin består av kvalitativa data, från datainsamlingsteknikerna som bestod av intervjuer, dokumentstudier och observationer. Dokumentstudierna var interna dokument från fallföretaget. Observationerna och intervjuerna var av semistrukturerad karaktär. För analysen av intervjuerna användes en tematisk analys, men för observationerna och dokumentstudierna användes en kvalitativ dataanalys.

    Resultat – Studien visade att materialflödet endast går från leverantör till godsmottagningen, medan informationsflödet involverar aktörerna inköpsavdelningen, leverantören och godsmottagningen. Kombinationen av empiriska och teoretiska data från nuvarande flödesutmaningar, identifierades möjligheter för materialhantering vid godsmottagning. För att uppnå effektivare materialhantering måste företag arbeta med relationella- och kontraktsbaserade styrmekanismer. Det är viktigt att förbättra kommunikationen, minska osäkerhet, kommunicera förväntningar, ge återkoppling och använda lämpliga kommunikationsmedier.

    Implikationer – Genom studiens resultat framkommer praktiska implikationer för företag genom att arbeta med kontrakt- och relationella styrmekanismer, samt betydelsen av förbättringsmöjligheter för kommunikation av förväntningar och återkoppling för att minska osäkerhet med lämpliga kommunikationsmedier. Studien påvisar hur företag och beslutsfattare framgångsrikt kan styra och samarbeta med sina leverantörer för att främja effektiv materialhantering vid godsmottagning, som i tidigare studier ofta har misslyckats.

    Begränsningar – Studiens metod är en enfallstudie, vilket medför vissa begränsningar. Genom att endast studera ett fall kan resultaten vara svåra att generalisera. Studiens trovärdighet hade kunnat stärkas ytterligare genom att inkludera fler intervjuer och observationer.

    Fulltekst (pdf)
    fulltext
  • 26.
    Nilsson, Anton
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Massövervakningens påverkan på intresset för öppen källkod2014Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Under 2013 skedde det hittills största läckaget av hemliga dokument. Dessa avslöjanden detaljerar den hemliga övervakning som genomförs av bl.a. amerikanska underrättelsetjänsten NSA (National Security Agency). Offentliggörandet att stora IT-företag är delaktiga i denna övervakningen via samarbete med NSA har även framkommit. Förespråkare av särskilt öppen källkod ser massövervakningen som en inkräktan på den enskildes integritet. Därför är det intressant att ur en studiesynpunkt ta reda på om intresset för öppen källkod har ändrats eller är på väg att ändras på grund av de avslöjanden som skett i samband med avslöjandet av massövervakningen. Öppen källkod kan vara ett alternativ för företag som vill utforska lösningar utöver de traditionella och proprietära leverantörerna. Syftet med studien är att ta reda på om svenska företag anser att massövervakningen påverkar dem samt att undersöka om företag idag använder sig av öppen källkod eller om de nu överväger detta efter vad som offentliggjorts. Finns det en eventuell koppling mellan massövervakningen och intresset för öppen källkod. Frågeställningar är som följer:

    * Hur stor del av företagen i Sverige använder öppen källkod idag och hur stor del överväger att använda sig mer av öppen källkod?

    * Finns det en koppling mellan avslöjanden kring massövervakning och intresset för öppen källkod bland svenska företag?

    En empirisk kvalitativ studie har genomförts för att besvara dessa frågeställningar utifrån företags- och organisationers svar och åsikter från genomförda intervjuer med slumpmässigt utvalda respondenter. En intervjuguide med utvärderande frågor skrevs med ansatsen att ge respondenterna en öppenhet i deras svar.

    Resultatet påvisar att svenska företag generellt inte tillämpat större förändringar inom sina system efter offentliggörandet av massövervakningen utan fokus har istället legat på att förändra sina IT-säkerhetspolicys samt ett förändrat synsätt på hantering av hur dokument sparas och skickas. Svenska företag använder generellt öppen källkod i större skala då det numera ses som ett mer accepterat alternativ samt en bra grund att bygga applikationer på. Företag som sedan tidigare innehar en utpräglad Microsoft-strategi är inte särskilt villiga att titta på alternativa lösningar utan förklarar att de har tillit till sina leverantörer samt att implementering resulterar i kostnadsfrågor. Sensmoralen är att det kan finnas ett samband mellan massövervakningen och intresset för öppen källkod inom IT-branschen men att detta ännu är något tidigt att uttala sig om då större märkbara förändringar tar tid att genomföra.

    Fulltekst (pdf)
    fulltext
  • 27.
    Oualil, S.
    et al.
    Hassan II University, Casablanca, Morocco.
    Oucheikh, Rachid
    Jönköping University.
    El Kamili, M.
    Hassan II University, Casablanca, Morocco.
    Berrada, I.
    Mohammed VI Polytechnic University, Benguerir, Morocco.
    A Personalized Learning Scheme for Internet of Vehicles Caching2021Inngår i: 2021 IEEE Global Communications Conference, GLOBECOM 2021: Proceedings, Institute of Electrical and Electronics Engineers (IEEE), 2021Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The emergence of Internet of Vehicles (IoV), as a large-scale distributed system, introduces new research and development challenges for supporting resource-constrained devices. In fact, the latency of retrieving contents and performing the desired tasks may increase dramatically and failures may occur when resource limits are exceeded. In this paper, we assess the use of advanced machine learning paradigms to achieve more accurate personalized edge caching and replacement decisions, while supporting data privacy, vehicle mobility, time-varying and location-aware content popularity. Firstly, we show that popular federated learning-based schemes fail in maintaining acceptable performance under the above settings. Secondly, we propose a scalable-by-design edge caching scheme for IoV, leveraging decentralized region-to-region Road Side Units (RSUs) exchanges while enhancing region local models. Finally, simulation results show that our scheme achieves higher performance in terms of average delay and edge hit ratio while keeping the cost and privacy risks at a minimum.

  • 28.
    Paulsson, Felix
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Avdelningen för datateknik och informatik.
    Bitar, Issa
    Jönköping University, Tekniska Högskolan, JTH, Avdelningen för datateknik och informatik.
    An evaluation of coverage models for LoRa2021Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    LoRaWAN is a wireless network technology based on the LoRa modulation technology. When planning such a network, it is important to estimate the network’s coverage, which can be done by calculating path loss. To do this, one can utilize empirical models of radio wave propagation. Previous research has investigated the accuracy of such empirical models for LoRa inside cities. However, as the accuracy of these models is heavily dependent on the exact characteristics of the environment, it is of interest to validate these results. In addition, the effect of base station elevation on the models’ accuracy has yet to be researched.

    Following the problems stated above, the purpose of this study is to investigate the accuracy of empirical models of radio wave propagation for LoRa in an urban environment. More specifically, we investigate the accuracy of the models and the effect of base station elevation on the models’ accuracy. The latter is the main contribution of this study.

    To perform these investigations, a quantitative experiment was conducted in the city of Jönköping, Sweden. In the experiment a base station was positioned at elevations of 30, 23, and 15m. The path loss was measured from 20 locations around the base station for each level of elevation. The measured path loss was then compared to predictions from three popular empirical models: the Okumura-Hata model, the COST 231-Walfisch-Ikegami model, and the 3GPP UMa NLOS model. Our analysis showed a clear underestimation of the path loss for all models.

    We conclude that for an environment and setup similar to ours, models underestimate the path loss by approximately 20dB. They can be improved by adding a constant correction value, resulting in a mean absolute error of at least 3,7-5,6dB. We also conclude that the effect of base station elevation varies greatly between different models. The 3GPP model underestimated the path loss equally for all elevations and could therefore easily be improved by a constant correction value. This resulted in a mean absolute error of approximately 4dB for all elevations.

    Fulltekst (pdf)
    fulltext
  • 29.
    Tirosh, Daniél
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Datateknik och informatik.
    Design utav kompakt multifrekvent RFID-system2019Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Radio Frequency Identification, RFID, is a wireless identification method which uses electromagnetic fields in order to communicate with electronic tags in the vicinity. In recent years, in conjunction with the digitalization of society, RFID has become a popular method for digital identification. RFID, as a method for digital identification, is often used for credit card payments in store, access control to locked rooms and renting books at libraries. As a result of RFID growing rapidly, different frequencies have emerged. In order to benefit from different frequencies, a multi frequency RFID-reader was designed. The purpose of this study was to examine which difficulties arise in the development of a small multi frequency RFID-reader. This study shows that a small multi frequency RFID-reader lacks the conditions that are required to reach the read distance specified in available research. Furthermore, the study shows it is difficult to read different tags simultaneously without the use of a RTOS or a multicore processor.

    Fulltekst (pdf)
    fulltext
  • 30.
    Tisma, Eddie
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Nilsson, Johan
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Development of Web portal for health centre Aroma in Vetlanda2011Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    This exam paper has been made with the health care center Aroma in Vetlanda. The work was to deliver a complete web portal with an integrated booking system. The objectives were to provide a complete informative website for Aromas users with the option to make an appointment for a vaccination or health certificate, order prescriptions and get update information directly published by Aromas staff. And to give the staff of Aroma a graphical Web interface to manage the content and the booking system.The report goes through the basic language used and why. Further it takes up it how works and how the final product looks and behaves.

    Fulltekst (pdf)
    JTH_THESIS_AROMA
  • 31.
    Vaezipour, Atiyeh
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Informationsteknik.
    Mosavi, A
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Informationsteknik.
    Seigerroth, Ulf
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Informationsteknik.
    Visual Analytics for Informed Decisions2013Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Energy efficiency heavily depends on effective building construction. It is more appropriate if one can predict energy efficiency of the house before building it.Here simple application of the Nearest Neighbors lazy learning techniques improveestimating the energy efficiency of a building. Visual analytics tools considered a smart solution as a function of modeling parameters by using Machine Learning framework in a suitable way. It is a powerful way to improve energy saving in building construction and making informed decisions.“LIONsolver with a novel implementation of machine learning plus optimization provides a highly advanced environment for predictive analytics. In this poster a case study from the LIONbook is presented where the energy consumption for a newhouse project is predicted. The predictive analytics environment of LIONsolver in this case study has transformed the optimal design from a very complicated and time consuming process to a very speedy and simple strategy for design and decisionmaking.”

  • 32.
    Valjakka, Adina
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Avdelningen för datateknik och informatik.
    Ahlinder, Anton
    Jönköping University, Tekniska Högskolan, JTH, Avdelningen för datateknik och informatik.
    An evaluation of LoRa transmission parameter selection for indoor positioning2022Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    The purpose of this thesis is to investigate how the LoRa modulation configuration affects precision and accuracy when using LoRa for indoor positioning in non-line-of-sight conditions. The aim is to research if an optimum combination of spreading factor, bandwidth, and code rate factor can be found to result in the best possible positioning accuracy and precision, under certain predefined conditions.

    An experiment was conducted, where quantitative data was collected from an experimental setup. The experiment consisted of two testbeds which also included an analysis between them. Two kinds of test units were used in the experiment. The LoRa 868 MHz transmitter, which represented the unknown position, and the receivers that were used to estimate the position of the transmitter. The experiment gathered the RSSI values between the transmitter and receivers at different configurations and locations. The data collected from the experiment were analyzed using mathematical theory to answer the research question. The most accurate and precise value for each individual transmission parameter was established in the first testbed and used as the base data rates in the second testbed, to evaluate the best performing parameters simultaneously.

    The mean accuracy in testbed 1 varied from 180 cm to 388 cm, and the mean precision ranged between 0.432 dBm to 1.298 dBm. The mean accuracy in testbed 2 varied from 341 cm to 455 cm, and the mean precision ranged between 0.275 dBm to 1.495 dBm. 

    The experimental results indicate no connections between the data rate and precision. No correlation is found between the accuracy and the data rate. The standard deviation and absolute error fluctuate independently of the data rate and the transmitter position.

    In regard to the given results, the authors conclude that no linear relationship is found between the LoRa modulation configuration and the precision and accuracy of a position, in the selected environment. The experimental results show that LoRa could be used for indoor positioning applications where a rough estimation of a position is adequate since the mean accuracy is quite low for almost all tested modulation configurations. There could be applications where other factors, such as the energy consumption or communication range, are of more importance than accuracy. For those applications, LoRa could still be an adequate choice of technology. 

    Fulltekst (pdf)
    fulltext
  • 33.
    Warell, Anton
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Avdelningen för datateknik och informatik.
    Dali Khaled, Ahmad
    Jönköping University, Tekniska Högskolan, JTH, Avdelningen för datateknik och informatik.
    Medical Internet of Things inom svensk hälso- och sjukvård: En intervjustudie om integritetsutmaningar och vidtagna åtgärder vid implementation och drift av MIoT2022Independent thesis Basic level (degree of Bachelor), 180 hpOppgave
    Abstract [en]

    Today, healthcare is more connected to the internet and handles greater amounts of sensitive information than ever before. This information is managed to a greater extent by various IT systems that form the basis for the digitization that is carried out in healthcare, where IoT systems play a significant role.

    In healthcare, there are extensive challenges in protecting information and preserving privacy. Connected healthcare systems generate large volumes of information such as ongoing treatment for diseases and patient records. Therefore, healthcare becomes an attractive target for cyber-attacks. Initially, MIoT systems (Medical Internet of Things) used in healthcare are not secure enough to manage data and preserve privacy.

    The purpose of this study is to examine what measures are taken in Swedish healthcare to manage the security and privacy issues that exist when implementing and using MIoT.

    A qualitative interview study was conducted. As method for data collection a semi-structured interview was applied to answer the study’s purpose and research question. Based on previous literature and collected empirical data, 5 categories were identified and described thematically based on the informants' answers. The study examines the work with information security and cyber security within the implementation and use of MIoT at several organizations in the healthcare sector to obtain diversity in collected data.

    This study demonstrates the security measures that are taken in the healthcare sector to manage security and privacy issues during the implementation and management of MIoT. The study provides a description of the measures taken to protect information and preserve privacy, as well as further reasoning regarding the complexity of current legislation to manage personal data. The recommendations of this study show that additional security measures are required for a reliable and secure implementation of MIoT in healthcare.

    Fulltekst (pdf)
    fulltext
  • 34.
    Westin, Mia
    Jönköping University, Tekniska Högskolan.
    The municipal challenges of the accessibility act: A study of the challenges in compliance with the Swedish act on accessibility to digital public service within Swedish municipalities2022Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Digitalization in society is going fast and was accelerated further by the Covid-19 pandemic. By this, many people's everyday tasks were transferred to digital environments. This meant in Sweden that most new internet users in 2020 were people over the age of 75 and people with different types of disabilities. Due to this increase in digitalization and all these new internet users, accessibility online is a subject that has gained higher significance.

    Since September 2020, all Swedish municipalities' websites must be accessible by law. Municipalities have a great responsibility to make information and necessary services available to the public. The purpose of this study was to investigate how well municipalities succeed with their work with web accessibility as a consequence of the legislation in Sweden and identify where the municipalities meet concrete obstacles in order to comply with the law. The purpose was also to investigate how the work with web accessibility on municipal websites can be simplified, improved, or otherwise enabled for those who work with such issues in the municipalities. To fulfill the purpose, two research question was formed for the study:

    1.     In the process of making municipalities’ websites accessible, which are the concrete obstacles that make the work difficult for those who work with such issues in the municipalities?

     

    2.     How can the work with the accessibility of municipal websites be simplified, improved, or otherwise enabled for those who work with such issues in the municipalities?

    To answer the research questions, two methods were chosen, a web survey and in-depth interviews, which corresponds to a combination of a quantitative and a qualitative method. The web survey was sent out to all municipalities in Sweden with the focus to answer RQ1 and the in-depth interviews were conducted with two accessibility experts with the focus to answer RQ2. Several obstacles were identified relating to lack of resources, lack of competence, lack of understanding of the law and the interpretation of it, attitudes, and old technology. Solutions on how the work can be simplified for those who work with web accessibility were identified relating to attitudes, resources, competence, legislation, and consumer demands. The main conclusions were that even though a municipality comply fully with the law, it does not mean that the website is accessible for all users, hence the law is not comprehensive enough. It also shows that there are several aspects that makes it hard for the municipalities to comply with the law and that most of these aspects also are the areas that needs improvement for the work to be simplified for the municipalities.

    Fulltekst (pdf)
    fulltext
  • 35.
    White, Ciaran
    Högskolan i Jönköping, Internationella Handelshögskolan, IHH, Informatik.
    Security in Cloud Computing Environments2019Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Cloud Computing Security is an important theme connected to international privacy laws such as the European GDPR. Companies are required to secure their systems and encrypt sensible personal data to an appropriate level. This leads to different security measures and security solutions in different companies and industries. The purpose of the study was to identify suitable security measures and data encryptions in different company settings and their connection to Cloud Computing environments. A literature review and a multiple case study in four different companies from different industries were conducted. The findings were then analysed in a cross-case analysis split into the focus areas of Cloud Computing, Security issues and measures and different encryption methods. Based on these results, a model was developed combining both the findings from the review and the case-study, emphasizing the importance of appropriate security measures implemented in the Cloud Computing environment for both clients and service providers as well as the importance of the underlying trust requirements to enable a successful joint-venture. The final discussion addresses theoretical, ethical and managerial implications as well as the limitations. Finally, an outlook on future research topics in the field of Cloud Computing, IT Security and Encryption Methods is given and discussed.

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