miun.sePublikasjoner
Endre søk
Begrens søket
1234 51 - 100 of 187
RefereraExporteraLink til resultatlisten
Permanent link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Treff pr side
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sortering
  • Standard (Relevans)
  • Forfatter A-Ø
  • Forfatter Ø-A
  • Tittel A-Ø
  • Tittel Ø-A
  • Type publikasjon A-Ø
  • Type publikasjon Ø-A
  • Eldste først
  • Nyeste først
  • Skapad (Eldste først)
  • Skapad (Nyeste først)
  • Senast uppdaterad (Eldste først)
  • Senast uppdaterad (Nyeste først)
  • Disputationsdatum (tidligste først)
  • Disputationsdatum (siste først)
  • Standard (Relevans)
  • Forfatter A-Ø
  • Forfatter Ø-A
  • Tittel A-Ø
  • Tittel Ø-A
  • Type publikasjon A-Ø
  • Type publikasjon Ø-A
  • Eldste først
  • Nyeste først
  • Skapad (Eldste først)
  • Skapad (Nyeste først)
  • Senast uppdaterad (Eldste først)
  • Senast uppdaterad (Nyeste først)
  • Disputationsdatum (tidligste først)
  • Disputationsdatum (siste først)
Merk
Maxantalet träffar du kan exportera från sökgränssnittet är 250. Vid större uttag använd dig av utsökningar.
  • 51.
    Engvall, Tove
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    User participation: what can be learned from the information systems domain?2019Inngår i: Records Management Journal, ISSN 0956-5698, E-ISSN 1758-7689, Vol. 29, nr 3, s. 320-332Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Purpose: Many records professionals are involved in the design and development of recordkeeping systems. To design recordkeeping systems that meet user needs, their perspectives have to be included in the design process. The purpose of this paper is to explore what can be learned from the domain of information systems (IS) regarding user participation in design, and then to reflect on what related to the recordkeeping dimension should be further considered. Design/methodology/approach: The study is based on a review of literature in the IS development field about user participation. Findings: Analysing how users participate in IS development reveals several aspects of interest for records professionals. There are different approaches to, purposes of and driving values in user participation, which should be transparent. For user participation to be successful, an infrastructure has to be in place. The idea of user participation may be a way to include the secondary values of records in the near term, but it may also challenge traditional roles. New issues, such as the archivist’s role as a trusted third party, should be analysed further. Originality/value: This study uses knowledge from the information system field to acquire new knowledge about user participation in design, and relate it to the recordkeeping domain. This study addresses issues surrounding user participation, which has been indicated as an area in need of further development in archives and information science.

  • 52.
    Engvall, Tove
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Anderson, Karen
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Bunn, Jenny
    University College London.
    Flinn, Andrew
    University College London.
    Michetti, Giovanni
    Sapienza University of Rome.
    Gänser, Georg
    InterPARES Trust.
    Cai, Yingfang
    The State Archives Administration of China.
    Henttonen, Pekka
    University of Tempere.
    The role of the records professional2019Inngår i: Trusting Records in the Cloud / [ed] Luciana Duranti & Corinne Rogers, London: Facet Publishing, 2019, 1, s. 223-244Kapittel i bok, del av antologi (Fagfellevurdert)
    Abstract [en]

    With digitalization, professional roles changes. New tasks, skills and collaboration with other professions are needed. This chapter highlight core responsibilities and expertise that records professionals contribute. It also highlight examples from initiatives with open data in Sweden and United Kingdom, as well as development of digitization of accounting in China. 

  • 53.
    Eriksson, John
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Karlsson, Tobias
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Visualiseringsverktyg för migrerad kod: Ersättare till Guardien2019Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Java is one of the most widely used programming languages used today. CSN that previously used 4 GL tool should now migrate to Java development, which means that there is a need for a tool to show dependencies and relationships in the migrated and newly developed Java code. The GuardIEn was previously used in the old code base, but that tool will be wound up after CSN's after migration to Java. The overall purpose of the project is to create a graph database with data that is scanned with the tool jqAssistant. This database is then used by a Java backend that retrieves relationships and nodes from the graph database which is then used with a separate web interface in Angular to visualize all relations between program code

    Fulltekst (pdf)
    fulltext
  • 54.
    Eriksson, Marie
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Företagspresentation: Med WordPress och fokus på användbarhet2019Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Abstract [en]

    The goal of this project has been to develop a website of the type of company presentation with opportunities for time booking for an organic hairdressing salon. The project's focus has been on usability and typography adapted for the web. In order to achieve usability, the project has been carried out based on various methods such as examination of similar systems, investigation to find out users' wishes, user stories, personas and scenarios and a few simpler usability tests. The personas with scenarios that have been developed have then been the basis for the work with the website together with a requirement list. In order to give the company its graphic profile, basic design and layout, a mood board and wireframes have been created. A responsive website prototype has then been developed where parts produced for the graphic profile and images are included. Based on the prototype, a website has been developed with its own theme in the content management system WordPress, to begin with on a local web server and the database MariaDB and finally on a web hosting server. The site's theme, typography, and its features have been developed using HTML, CSS and PHP. Finally, a number of plugins have been installed for various purposes such as contact forms, user role management, time booking, backup, security aspects and search engine optimization. An accessibility test has been carried out with a tool to help evaluate how accessible the content is in both the website prototype and the final website. The report follows the development of a website whose content has been analyzed in the results based on design and construction as well as usability based on design principles, Nielsen's Usability Heuristics, web guidelines and typography. The methods described, used and implemented to achieve usability have probably contributed positively to the development of a website to present a company and its services. Despite this, there is further development potential of the website.

  • 55.
    Etemad, Seyedeh Soma
    et al.
    Department of Forestry, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, Iran.
    Mohammadi Limaei, Soleiman
    Mittuniversitetet, Fakulteten för humanvetenskap, Institutionen för ekonomi, geografi, juridik och turism. Department of Forestry, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, Iran.
    Olsson, Leif
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Yousefpour, Rasoul
    Department of Forestry Economics and Forest Planning, University of Freiburg, Freiburg, Germany.
    Forest management decision-making using goal programming and fuzzy analytic hierarchy process approaches (case study: Hyrcanian forests of Iran): Forest management decision-making2019Inngår i: Journal of Forest Science, ISSN 1212-4834, E-ISSN 1805-935X, Vol. 65, nr 9, s. 368-379Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The aim of this study is to determine the optimum stock level in the forest. In this research, a goal programming method was used to estimate the optimal stock level of different tree species considering environmental, economic and social issues. We consider multiple objectives in the process of decision-making to maximize carbon sequestration, net present value and labour. We used regression analysis to make a forest growth model and allometric functions for the quantification of carbon budget. Expected mean price is estimated using wood price and variable harvesting costs to determine the net present value of forest harvesting. The fuzzy analytic hierarchy process is applied to determine the weights of goals using questionnaires filled in by experts in order to generate the optimal stock level. According to the results of integrated goal programming approach and fuzzy analytic hierarchy processes, optimal volume for each species was calculated. The findings indicate that environmental, economic and social outcomes can be achieved in a multi-objective forestry program for the future forest management plans.

    Fulltekst (pdf)
    fulltext
  • 56.
    Falenius, Erik
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Jarl, Mikael
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Lean – En utveckling från produktion till välfärd och service: En litteraturstudie av hur Lean utvecklats från produktion till välfärds- och servicebranschen2019Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    This study consists of two studies around Lean. The studies are limited to two databases and three different sectors, the industry sector where Lean originated from, and the welfare and service sectors.

    The first study is a quantitative pilot study on published articles. The purpose was to get an understanding of what extent the different sectors get published, compared to each other. The result was illustrated in a graph where 40 articles per year were proportionally divided between the three sectors.

    The main study is a literature review where a scoring matrix was used to cull the selected articles. The remaining articles where compared to the “Toyota house” to answer the research questions:

    In what way has the definition of Lean changed from the manufacturing-based improvement philosophy it originated as, to the concept that is used in different sectors today?

    How does the specific sector affect the implementation of Lean, is there a difference in the Lean that is described in the literature compared to the Lean that is used in the welfare or service sectors?

    The study found in the chosen literature is that the sectors that are new at using Lean are using less of the tools available and in a smaller part of the organization, instead of using it on the whole organization. Many case studies where found that describes what tool was used, but not how they were used. One sector with many published articles was the construction sector, but they were overlooked due to the limitations of the study.

    Fulltekst (pdf)
    fulltext
  • 57.
    Falk, Jalal
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    DevOps-tjänster vid tillämpning av agil arbetsmetod – användning av Jira och Azure DevOps i små till medelstora IT-företag2019Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Det ställs högra krav på små till medelstora IT-företag vad gäller arbetsprocesser och tillämpning av agil arbetsmetod. Syftet med denna studie är att undersöka användningen av DevOps-tjänsterna Jira och Azure DevOps vid tillämpning av agila arbetsmetoder i små till medelstora IT-företag enligt företagens egna erfarenheter och upplevelser. Intervjuer har gjorts med två IT-företag som tillämpar en agil arbetsprocess tillsammans med DevOps-tjänsterna Jira respektive Azure DevOps. Slutsatserna är att DevOps-tjänsterna bidrar med struktur, översikt, diagnostik och är bidragande vid kommunikation. Båda IT-företagen själva säger att de rekommenderar sin respektive DevOps-tjänst och det finns många sätt som tjänsterna kan bidra till den agila processen på.

     

    Fulltekst (pdf)
    fulltext
  • 58.
    Farag, Hossam
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Enabling Time- and Mission-Critical Applications in Industrial Wireless Sensor Networks2019Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Nowadays, Wireless Sensor Networks (WSNs) have gained importance as aflexible, easier deployment/maintenance and cost-effective alternative to wired networks,e.g., Fieldbus and Wired-HART, in a wide-range of applications. Initially,WSNs were mostly designed for military and environmental monitoringapplications where energy efficiency is the main design goal. The nodes in the network were expected to have a long lifetime with minimum maintenance while providing best-effort data delivery which is acceptable in such scenarios. With recent advances in the industrial domain, WSNs have been subsequently extended to support industrial automation applications such as process automation and control scenarios. However, these emerging applications are characterized by stringent requirements regarding reliability and real-time communications that impose challenges in the design of Industrial Wireless Sensor Networks (IWSNs) to effectively support time- and mission-critical applications.

    Typically, time- and mission-critical applications support different traffic categories ranging from relaxed requirements, such as monitoring traffic to firm requirements, such as critical safety and emergency traffic. The critical traffic is mostly acyclic in nature and occasionally occurs at unpredictable time instants. Once it is generated, it must be delivered within strict deadlines. Exceeding the delay bound could lead to system instability, economic loss, or even endanger human life in the working area. The situation becomes even more challenging when an emergency event triggers multiple sensor nodes to transmit critical traffic to the controller simultaneously. The unpredictability of the arrival of such a type of traffic introduces difficulties with regard to making a suitable scheduling that guarantees data delivery within deadline bounds. Existing industrial standards and related research work have thus far not presented a satisfactory solution to the issue. Therefore, providing deterministic and timely delivery for critical traffic and its prioritization over regular traffic is a vital research topic.

    Motivated by the aforementioned challenges, this work aims to enable real-timecommunication for time- and mission-critical applications in IWSNs. In this context, improved Medium Access Control (MAC) protocols are proposed to enablea priority-based channel access that provides a timely delivery for acyclic critical traffic. The proposed framework starts with a stochastic modelling of the network delay performance under a priority-oriented transmission scheme, followed by two MAC approaches. The first approach proposes a random Clear Channel Assessment (CCA) mechanism to improve the transmission efficiency of acyclic control traffic that is generated occasionally as a result of observations of an established tendency, such as closed-loop supervisory traffic. A Discrete-Time Markov Chain (DTMC) model is provided to evaluate the performance of the proposed protocol analytically in terms of the expected delay and throughput. Numerical results show that the proposed random CCA mechanism improves the shared slots approach in WirelessHART in terms of delay and throughput along with better transmission reliability.

    The second approach introduces a slot-stealing MAC protocol based on a dynamic deadline-aware scheduling to provide deterministic channel access in emergency and event-based situations, where multiple sensor nodes are triggered simultaneously to transmit time-critical data to the controller. The proposed protocol is evaluated mathematically to provide the worst-case delay bound for the time-critical traffic and the numerical results show that the proposed approach outperforms TDMA-based WSNs in terms of delay and channel utilization.

    Fulltekst (pdf)
    fulltext
  • 59.
    Farag, Hossam
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Gidlund, Mikael
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Österberg, Patrik
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    DeP-D: A Decentralized Primal-Dual Optimization Algorithm for Industrial Wireless Sensor Networks2019Inngår i: 2019 15th IEEE International Workshop on Factory Communication Systems (WFCS), IEEE, 2019, artikkel-id 8757934Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Industrial Wireless Sensor Networks (IWSNs) are emerged as flexible and cost-efficient alternatives to the traditional wired networks in various monitoring and control applications within the industrial domain. Low delay is a key feature of delay-sensitive applications as the data is typically valid for a short interval of time. If data arrives too late it is of limited use which may lead to performance drops or even system outages which can create significant economical losses. In this paper, we propose a decentralized optimization algorithm to minimize the End-to-End (E2E) delay of multi-hop IWSNs. Firstly, we formulate the optimization problem by considering the objective function as the network delay where the constraint is the stability criteria based on the total arrival rate and the total service rate. The objective function is proved to be strictly convex for the entire network, then a Decentralized Primal-Dual (DeP-D) algorithm is proposed based on the sub-gradient method to solve the formulated optimization problem. The performance of the proposed DeP-D is evaluated through simulations and compared with WirelessHART network and the results show that the proposed DeP-D can achieve at least 40% reduction in the average E2E delay.

  • 60.
    Farag, Hossam
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Sisinni, Emiliano
    Brescia University, Brescia, Italy.
    Gidlund, Mikael
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Österberg, Patrik
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Priority-Aware Wireless Fieldbus Protocol for Mixed-Criticality Industrial Wireless Sensor Networks2019Inngår i: IEEE Sensors Journal, ISSN 1530-437X, E-ISSN 1558-1748, Vol. 19, nr 7, s. 2767-2780Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Industrial wireless sensor networks are becoming popular for critical monitoring and control applications in industrial automation systems. For such type of applications, providing reliable real-time performance regarding data delivery is considered as a fundamental challenge. The problem becomes more prominent with mixed-criticality systems, where different data flow with different levels of criticality (importance) coexist and characterized by different requirements regarding delay and reliability. In this paper, we propose a wireless fieldbus protocol to enable real-time communication and service differentiation for cluster-based mixed-criticality networks. A process monitoring scenario of plastic extrusion is used to define the protocol requirements and elaborate the working principle of the proposed work. In our proposed protocol, each data flow is scheduled for channel access based on its criticality level using a distributed prioritized medium access mechanism that ensures a guaranteed channel access for the most critical traffic over other traffic types. The performance of the proposed protocol is analyzed analytically using a discrete-time Markov chain model to evaluate the performance in terms of delay and throughput. Moreover, the extensive simulations are conducted to prove the analytical claims and different performance assessments are provided, which also demonstrate the effectiveness of the proposed approach compared with the related existing work.

  • 61.
    Farag, Hossam
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Österberg, Patrik
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Gidlund, Mikael
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Han, Song
    University of Connecticut,USA.
    RMA-RP: A Reliable Mobility-Aware Routing Protocol for Industrial IoT Networks2019Inngår i: 2019 IEEE Global Conference on Internet of Things (GCIoT), IEEE, 2019Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Many emerging Industrial Internet of Things (IIoT) applications involve the use of mobile devices, such as sensors and robots in industrial automation scenarios. Movement of mobile sensor nodes causes intermittent connectivity which in turn deteriorates the network performance in terms of packet loss and delay. The Routing Protocol for Low Power and Lossy Networks (RPL) is introduced as the standard routing protocol for IIoT networks. Although RPL constitutes a reliable and energy-efficient solution for static networks, there is no mechanism defined in the RPL standard of how to support routing in mobile IIoT networks. This paper introduces RMA-RP, a reliable mobility-aware routing protocol to support mobile IIoT networks. RMA-RP utilizes a dynamic motion detection mechanism based on the link quality to cope with topology changes by updating next-hop nodes. Moreover, an adaptive timer is introduced to manage the transmission rate of control messages in order to decrease the network overhead and in turn the energy consumption. We evaluate the performance of RMA-RP through extensive simulations in comparison to existing works and the results demonstrate that RMA-RP has at least 17% higher packet delivery ratio and achieves a reduction of 34% and 51% in terms of delay and network overhead, respectively.

  • 62.
    Fasth, Tobias
    et al.
    Stockholms Universitet.
    Bohman, Samuel
    Stockholms Universitet.
    Larsson, Aron
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi. Stockholms Universitet.
    Ekenberg, Love
    Stockholms Universitet; IIASA.
    Danielson, Mats
    Stockholms Universitet; IIASA.
    Portfolio Decision Analysis for Evaluating Stakeholder Conflicts in Land Use Planning2020Inngår i: Group Decision and Negotiation, ISSN 0926-2644, E-ISSN 1572-9907, Vol. 29, s. 321-343Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Urban planning typically involves multiple actors and stakeholders with conflicting opinions and diverging preferences. The proposed development plans and actions greatly affect the quality of life of the local community at different spatial scales and time horizons. Consequently, it is important for decision-makers to understand and analyse the conflicting needs and priorities of the local community. This paper presents a decision analytic framework for evaluating stakeholder conflicts in urban planning. First, the stakeholders state their preferences regarding the actions in terms of a set of criteria and estimate the weight of each criterion. Then, a conflict index and overall value for each action is calculated. Next, a set of Pareto efficient portfolios of actions are generated by solving an optimization problem with different levels of conflict as a resource constraint. Finally, a sensitivity analysis of the actions is performed. The framework is demonstrated using real-world survey data collected in the municipality of Upplands Vasby, Sweden.

    Fulltekst (pdf)
    fulltext
  • 63.
    Ferrari, Nico
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Context-Based Authentication and Lightweight Group Key Establishment Protocol for IoT Devices2019Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    The concept of the Internet of Things is driven by advancements of the Internet with the interconnection of heterogeneous smart objects using different networking and communication technologies. With the rapidly increasing

    number of interconnected devices present in the life of a person, providing authentication and secure communication between them is considered a key challenge. The integration of Wireless Sensor Networks in the Internet of Things creates new obstacles due to the necessity of finding a balance between the resources utilization and the applied security solutions. In multicast group communications, the energy consumption, bandwidth and processing overhead at the nodes are minimized in comparison to a point-to-point communication system. To securely transmit a message in order to maintain confidentiality of the data and the user’s privacy, usually involves human interaction or the pre-agreement upon some key, the latter unknown to an external attacker. In this thesis, the author proposed an authentication

    protocol based on the similar context between the correct devices and lightweight computationally secure group-key establishment, avoiding any kind of human involvement. The goal is achieved by having the devices calculate a fingerprint from their ambient context and through a fuzzy commitment scheme generating a commitment respectively opening value which is used to generate a common secret key between them. The tests are effected on real world data accumulated from different environments. The proposed scheme is based on elliptic curve cryptography and cryptographic one-way accumulators. Its feasibility is analyzed by implementing the group key establishment phase in the Contiki operating system and by simulating it with the Cooja simulator. Furthermore, the applicability of

    the protocol is analyzed and justified by an analysis of the storage overhead, communication overhead, and energy consumption. The simulator shows an energy consumption of only 112 mJ per node for group key establishment.

    The results obtained in this thesis demonstrate the feasibility of the scheme, it’s computational, and communication costs are further comparable to other similar approaches.

    Fulltekst (pdf)
    fulltext
  • 64.
    Forsström, Stefan
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Blockchain Research Report2019Rapport (Annet vitenskapelig)
    Abstract [en]

    This research report outlines the current research into blockchain technologies as of December 2018. Starting with an overview of the blockchain technology to introduce the theory. To then follow with deep looks into the different aspects of blockchain technologies, investigating the research articles and current state of work in these area, including the forefront of the research frontier. As well as existing blockchain products, an outlook on the future, conclusions that can be drawn from this study. With the intent to both create understand of the technologies, as well as inspire further research work and identifying potential knowledge gaps.

    Fulltekst (pdf)
    fulltext
  • 65.
    Forsström, Stefan
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Jennehag, Ulf
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    An Implemented Open Source Blockchain Market for Smart Grids and Microgrids Using Autonomous Agents2019Inngår i: COINS '19 Proceedings of the International Conference on Omni-Layer Intelligent Systems, ACM Digital Library, 2019, Vol. F148162, s. 116-121Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This article presents a system for creating an implemented open energy market for future smart grid systems, microgrids, the Internet of Things, and the Industrial Internet of Things. We also investigate and analyze different aspects of blockchain technologies for this purpose in order to choose the appropriate methods, technologies, and approaches for realizing and implementing the system as an open source project. Based on this analysis, we present our resulting functional implementation of this energy market. Including measurements and a quantitative evaluation of the implementation itself. Showing the potential of the approach, where this implantation can be applied, showing its drawbacks, and finally our planned future work.

  • 66.
    Fredin, Elias
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    GNSS undersökning: För bättre precision i smartphones2019Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    To be able to receive a position from a smartphone user is very valuable. Wit- hout this many applications would not work at all. For many applications the existing position libraries are not good enough, for example augmented reality applications which requires millimeter precision for a good experience. The goal of this report is to study if GNSS positioning can be improved for smartphones.The study focuses mostly on Android and has the goal of using the method “trilateration” to combine multiple satellites position and their distance to a receiver in order to calculate a real position. The projekt consists of two parts: and Android application and a Java Tomcat server. The android applica- tion uses the programming library “Location” to access raw GNSS-data for cal- culating the distance between the receiver and the satellites, which is called “pseudorange”, and the server functions as a REST API which provides GALI- LEO satellites current position. The project tries to combine these parameters in the Application to create a position. Although the report did not succeed in com- bining these parameters to calculate a position, it does describe of it is still pos- sible; which applications has succeeded before and what others ought to think about when starting similar studies. This project would require a bit more time to reach its end goal, but the fact that raw GNSS-data has become available to all developers on Android is a promising development since others may conti- nue or do their own research. This project focuses solely on GALILEO satelli- tes, mostly to time constraints. In future works all available satellite constella- tions should be used for better results.

    Fulltekst (pdf)
    fulltext
  • 67.
    Freyschuss, Jesper
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    System för digital skyltning till Fitness4You2019Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Abstract [en]

    This report summarizes development of a digital signage system for the client Fitness4You. The goal was to develop a system that can dynamically handle the content that Fitness4You wants to promote via screens located in their facilities. The system's user interface was developed in Angular, which has the task of managing and distributing the content that’s created. The server-side of the system was developed in PHP using Slim Framework with MariaDB as a database. To present the content that was created, the single-board computer Raspberry Pi were used. However, the choice to use Raspberry Pi as a media player was not obvious and questions were raised about how its performance would manage a web-based system. Theories that touches on what digital signage is and how the different technologies behave and how they work together are discussed. The report also touches on parts of the entire life cycle of the project and discusses requirements, modeling, design and code development. The project resulted in an executable system that can manage and present user-created content. However, the system still has some way to go before it can be delivered to Fitness4You. After a short but relatively demanding test, it turned out that the Raspberry Pi is a very capable small computer.

  • 68.
    Försth, Sebastian
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    When your finger isn't enough: New ways to increase the accessibility of mobile phones2019Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [en]

    The objective of this study has been to answer three questions. The questions are Can you navigate in a different way than with your fingers, Do you lose any functionality in the application when you are not using your fingers and is the solution a reasonable way to navigate. The study consist of two parts, the first is to create a navigation library with different navigation methods and the second part is to evaluate the navigation methods using user tests. The study shows that it is possible to navigate without the use of fingers and address problems and solution to navigate without the use of fingers. The study shows how different navigation methods perform compared to each other and compared to navigating with the use of fingers.

    Fulltekst (pdf)
    fulltext
  • 69.
    Gardner, Angelica
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Improving the Chatbot Experience: With a Content-based Recommender System2019Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Abstract [en]

    Chatbots are computer programs with the capability to lead a conversation with a human user. When a chatbot is unable to match a user’s utterance to any predefined answer, it will use a fallback intent; a generic response that does not contribute to the conversation in any meaningful way. This report aims to investigate if a content-based recommender system could provide support to a chatbot agent in case of these fallback experiences. Content-based recommender systems use content to filter, prioritize and deliver relevant information to users. Their purpose is to search through a large amount of content and predict recommendations based on user requirements. The recommender system developed in this project consists of four components: a web spider, a Bag-of-words model, a graph database, and the GraphQL API. The anticipation was to capture web page articles and rank them with a numeric scoring to figure out which articles that make for the best recommendation concerning given subjects. The chatbot agent could then use these recommended articles to provide the user with value and help instead of a generic response. After the evaluation, it was found that the recommender system in principle fulfilled all requirements, but that the scoring algorithm used could achieve significant improvements in its recommendations if a more advanced algorithm would be implemented. The scoring algorithm used in this project is based on word count, which lacks taking the context of the dialogue between the user and the agent into consideration, among other things.

    Fulltekst (pdf)
    fulltext
  • 70.
    Gebremichael, Teklay
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Lightweight Cryptographic Group Key Management Protocols for the Internet of Things2019Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    The Internet of Things (IoT) is increasingly becoming an integral component of many applications in consumer, industrial and other areas. Notions such as smart industry, smart transport, and smart world are, in large part, enabled by IoT. At its core, the IoT is underpinned by a group of devices, such as sensors and actuators, working collaboratively to provide a required service. One of the important requirements most IoT applications are expected to satisfy is ensuring the security and privacy of users. Security is an umbrella term that encompasses notions such as confidentiality, integrity and privacy, that are typically achieved using cryptographic encryption techniques.

    A special form of communication common in many IoT applications is group communication, where there are two or more recipients of a given message. In or-der to encrypt a message broadcast to a group, it is required that the participating parties agree on a group key a priori. Establishing and managing a group key in IoT environments, where devices are resources-constrained and groups are dynamic, is a non-trivial problem. The problem presents unique challenges with regard to con-structing protocols from lightweight and secure primitives commensurate with the resource-constrained nature of devices and maintaining security as devices dynamically leave or join a group.

    This thesis presents lightweight group key management protocols proposed to address the aforementioned problem, in a widely adopted model of a generic IoT network consisting of a gateway with reasonable computational power and a set of resource-constrained nodes. The aim of the group key management protocols is to enable the gateway and the set of resource-constrained devices to establish and manage a group key, which is then used to encrypt group messages. The main problems the protocols attempt to solve are establishing a group key among participating IoT devices in a secure and computationally feasible manner; enabling additionor removal of a device to the group in a security preserving manner; and enabling generation of a group session key in an efficient manner without re-running the protocol from scratch. The main challenge in designing such protocols is ensuring that the computations that a given IoT device performs as part of participating in the protocol are computationally feasible during initial group establishment, group keyupdate, and adding or removing a node from the group.

    The work presented in this thesis shows that the challenge can be overcome by designing protocols from lightweight cryptographic primitives. Specifically, protocols that exploit the lightweight nature of crypto-systems based on elliptic curves and the perfect secrecy of the One Time Pad (OTP) are presented. The protocols are designed in such a way that a resource-constrained member node performs a constant number of computationally easy computations during all stages of the group key management process.

    To demonstrate that the protocols are practically feasible, implementation resultof one of the protocols is also presented, showing that the protocol outperforms similar state-of-the-art protocols with regard to energy consumption, execution time, memory usage and number of messages generated.

    Fulltekst (pdf)
    fulltext
  • 71.
    Gebremichael, Teklay
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Jennehag, Ulf
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Gidlund, Mikael
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Lightweight IoT Group Key Establishment Scheme from the One Time Pad2019Inngår i: 2019 7th IEEE International Conference on Mobile Cloud Computing, Services, and Engineering (MobileCloud), IEEE, 2019Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Secure group communication in the Internet ofThings (IoT) entails the establishment and management of one or more group keys to provide group security services such as confidentiality of group messages. The main challenges in establishing a group key consist in designing a group key establishment scheme that is feasible for nodes with limited computational capabilities. In this paper, we propose a lightweight group key establishment scheme based on fast symmetric-key encryption. We show a mechanism for designing a lightweight and secure IoT group key establishment and management scheme whose security is underpinned by the perfect secrecy provided by the One-time-pad. We then argue that the scheme is convenient for IoT group applications where nodes are resource-constrained. We prove that our scheme is secure under a threat model where the attacker has sufficiently large computational power. We also prove that the scheme provides desired group security properties such as confidentiality, key secrecy and independent group session keys generation.

  • 72.
    Ghafoor, Mubeen
    et al.
    COMSATS Inst Informat Technol, Islamabad, Pakistan.
    Tariq, Syed Ali
    COMSATS Inst Informat Technol, Islamabad, Pakistan.
    Abu Bakr, M.
    COMSATS Inst Informat Technol, Islamabad, Pakistan.
    Jibran, J.
    COMSATS Inst Informat Technol, Islamabad, Pakistan.
    Ahmad, Waqas
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Zia, Tehseen
    COMSATS Inst Informat Technol, Islamabad, Pakistan.
    Perceptually Lossless Surgical Telementoring System Based on Non-Parametric Segmentation2019Inngår i: Journal of Medical Imaging and Health Informatics, ISSN 2156-7018, E-ISSN 2156-7026, Vol. 9, nr 3, s. 464-473Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Bandwidth constraint is one of the significant concerns of surgical telementoring, especially in rural areas. High-Efficiency Video Coding (H.265/HEVC) based video compression techniques have shown promising results for telementoring applications. However, there is a tradeoff between the quality of video received by the remote surgeon and the bandwidth resources required for video transmission. In order to efficiently compress and transmit real-time surgical videos, a hybrid lossless-lossy approach is proposed where surgical incision region (location of surgery) is coded in high quality while the background (non-incision) region is coded in medium to low quality depending on the nature of the region. The surgical incision region is detected based on an efficient color and location-based non-parametric segmentation approach. This approach takes explicitly into account the physiological nature of the human visual system and efficiently encodes the video by providing good overall visual impact in the location of surgery. The results of the proposed approach are shown in terms of video quality metrics such as Bjontegaard delta bitrate (BD-BR), Bjontegaard delta peak signal-to-noise ratio (BD-PSNR), and structural similarity index measurement (SSIM). Experimental results showed that in comparison with default full-frame HEVC encoding, the proposed surgical incision region based encoding achieved an average BD-BR reduction of 77.5% at high-quality settings (QP in range of 0 to 20 in surgical incision region and an increasing QP in skin and background region). The average gain in BD-PSNR of the proposed algorithm was 6.99 dB in surgical incision region at high-quality setting, and the average SSIM index came out to be 0.9926 which is only 0.006% less than the default full-frame HEVC coding. Based on these results, the proposed encoding algorithm can be considered as an efficient and effective solution for surgical telementoring systems for limited bandwidth networks.

  • 73.
    Gidlund, Katarina L
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Sundberg, Leif
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Undisclosed Practices of Digitalization - A critical analysis of representational practice and powerManuskript (preprint) (Annet vitenskapelig)
    Abstract [en]

    The aim of this paper is to study governmental expert advisory groups on digitalization in order to see if there are some common characteristics inside the group and some relevant characteristics left out that would significantly influence the shared understandings’ and translations of digitalization. The underpinnings are that it is important to study digital representational practices at all levels and that this level often escapes scrutiny. Furthermore, we need to stay close to material performances in order to open up a discussion whether, as a consequence, some translations might come to dominate others, if meanings converge and the technological frame is stabilized, or maybe even closed. The chosen analytical framework stretches from a link in between historical contextuality and technological culture (as in how and where myths and symbolic narratives are constructed), the focus on the process of interpretation (as in the flexibility in how digitalization could be translated and attached to different political goals and values) and a dimension of professional identities and communities of practice when addressing historical contextuality (as in using education and professional experiences and position to explore dominance and power aspects). The results show a homogeneity that is problematic and raises questions of the frames for interpreting what digitalization could and should be and do. We argue that the strong placing of digitalization in the knowledge base disclosed in this study hinders digitalization to be more knowledgeably translated. 

  • 74.
    Gidlund, Mikael
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Hancke, Gerhard P. Jr
    City University of Hong Kong, Hong Kong.
    Eldefrawy, Mohamed
    Halmstad University, Sweden.
    Åkerberg, Johan
    ABB Corporate Research, Sweden.
    Guest Editorial: Security, Privacy, and Trust for Industrial Internet of Things2020Inngår i: IEEE Transactions on Industrial Informatics, ISSN 1551-3203, E-ISSN 1941-0050, Vol. 16, nr 1, s. 625-628, artikkel-id 8952830Artikkel i tidsskrift (Fagfellevurdert)
  • 75.
    God, Jon
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Investerare & start-ups med fokus på hållbar utveckling: Discrete Choice Experiments för att undersöka investerares benägenhet att investera i hållbar utveckling2019Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [en]

    A sustainable development becomes more and more important with an increasing number of catastrophic and long-term changes to the environment due to global warming. This also means that all the actors in the society needs to take their responsibility to combat this development. One of these actors are the private sector where the investors plays a large part in which companies that gets to develop their ideas and make a difference in the world. So, the question is: are investors taking that responsibility today and invest in start-ups with a focus on sustainable development in their business plans. This thesis aims to study how inclined investors are to invest in start-ups with a focus on sustainable development in their business plan. This is tested though Discrete Choice Experiments where 14 investors got to choose between three different companies with different levels of focus on sustainable development. Company A with the least amount of sustainability, company B with some focus and company C with a high focus on sustainable development. The Discrete Choice Experiments were distributed through a survey format where the companies were represented with a Business Model Canvas each and the investors first got to choose between company A & B, then A & C, and then company B & C. The results show that investors chose company A with the least amount of focus on sustainable development in 26 percent of the cases, company B with some focus in 45 percent, and company C with a high amount of focus in 29 percent of the cases. The study also shows a variation between different groups of investors, i.e. the investors who identified themselves as women were more inclined on investing in more sustainable options then men, and angel investors showed a clear willingness to invest in sustainability compared to venture capitals. The conclusions of the study are that its purpose was fulfilled and that the research questions was answered, investors showed an inclination to investing in companies with some focus on sustainable development but not too much. The results of the study can be used by companies in need of investments since they can see what group they should focus on to increase their chances. It is despite this also important to remember that the reliability and the validity of the study can be criticised with flaws for example in the reputability of the results. Future research within the area should study larger populations of investors to see if the same patterns repeat itself in other groups. It should also split the different attributes of the business model to see if different attributes play a larger part when investors decide which company to invest in.

    Fulltekst (pdf)
    fulltext
  • 76.
    Granholm, Martina
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Materialitetens roller och förutsättningar i kommunal krisledning2019Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [sv]

    Arbetet med denna licentiatavhandling har skett inom ramarna för det Interregionalt finansierade projektet Gränslös samverkan för ökad säkerhet 2. Syftet med avhandlingen har varit att fördjupa kunskapen om kommunal krisledning genom att också inkludera materialitetens medverkan i krisledningen och vilka förutsättningarna är för att de ska brukas. Med perspektivet av hur analoga och digitala resurser används under krisledning och vilka förutsättningar som finns för att detta ska göras skapas insikter att ta i beaktande när övningar och IT-stöd för övningar. 

    Studier har genomförts med en kvalitativ ansats med litteraturstudier, intervjuer och observationer som datainsamlingsmetoder. Det empiriska materialet har därefter betraktats med meningsgivande (sensemaking) och affordans (affordance) som teoretiska perspektiv för att förstå materialitetens roll och förutsättning i kommunal krisledning.

    Avhandlingen visar att de förmågor som är återkommande under övningar är samverkan, kommunikation, informationsdelning och skapande av lägesbild. Ofta övas inte aktiviteterna i sin helhet då tekniska och analoga resurser inte innefattas i övningarna. Aktörerna övar därmed delar av görandet, att tänka kring exempelvis att skapa en lägesbild, och inte görandet som helhet som involverar materialitet.  Aktörernas egna reflektioner från utvärderingarna är att de själva önskar mer övning med de tekniska resurser som de har till sitt förfogande. Artikel II visar att materialiteten tar en stor plats i det arbete som sker i krisledningsrummet. Materialiteten kan ses anta roller som strukturgivande, meningsgivande, tidsöverbryggande och distansöverbryggande. Den tredje ingående artikeln visar att förutsättningar för att kunna bedriva krisledning är att kunna hantera materialitetens roller och att det krävs flexibilitet då krisledningsgruppens sammansättning är beroende av krisens art och omfattning. Ytterligare en förutsättning är trygghet i den egna organisationen, att känna sin egen roll i krisledningsgruppen och att kunna hantera de analoga och digitala resurser som finns tillgängliga är även det en förutsättning för arbetet. Avslutningsvis visar arbetet också att tid är viktig. Tid att kunna öva de personer som ska ingå i krisledningsgruppen för att därmed kunna skapa den trygghet som behövs. 

    Fulltekst (pdf)
    fulltext
    Fulltekst (pdf)
    fulltext
  • 77.
    Grimaldi, Simone
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Towards Radio-Environment Aware IoT Networks: Wireless Coexistence Methods for Low-complexity Devices2020Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Wireless technologies for short-range communication play a central role in the massive diffusion of the Internet of Things (IoT) paradigm. Such communication solutions rely extensively on the availability of unlicensed spectrum in the form of bands for industrial, scientific, and medical (ISM) applications. While ISM bands greatly simplify network deployments by avoiding operator-related costs and facilitating worldwide applicability, they present the shortcoming of non-cooperative spectrum usage, which manifests in the form of radio interference. Interference and time-varying environments generate complex and dynamic scenarios for wireless network deployments, endangering communication performance. The problem becomes especially critical when the timeliness and reliability of the communication are subject to stringent requirements, which is the case for several industrial IoT (IIoT) applications.

    This work aims to enhance the reliability and performance of wireless communication in IoT networks by enriching the existing methods for radio-environment analysis. The central idea of this research is that a run-time analysis of the radio channel properties is a crucial element to ensure performance stability in unpredictable radio environments with potentially disruptive interference.An added challenge of this work comes from the hypothesis that such an analysis can be performed even with strongly resource-constrained platforms without hindering routine network functionalities. The employed methodology is heavily reliant on experimental validation, encompassing implementation on IoT radio devices and measurement campaigns. This thesis makes two principal scientific contributions.

    The first contribution is the design of a comprehensive collection of methods for the analysis of the radio environment, designed to operate entirely onboard on IoT radio platforms.The approaches encompass interference detection, classification, spectrum analysis, link-state analysis, and detection of outages in end-to-end communication. The methods are designed to overcome the gap that exists in the related literature between the elaborate signal analysis operated with dedicated hardware and the lightweight, but sub-optimal, analysis methods developed for legacy wireless sensor networks.

    The second contribution of this work is made by showing potential uses of the developed analysis methods to: i) safeguard the performance of wireless communication under interference and ii) enhance the coexistence of co-located wireless networks. To this end, firstly, a proactive method for dynamic blacklisting is designed that exploits real-time signal analysis and significantly improves the communication reliability of an IIoT radio link under heavy radio interference. Secondly, a method for autonomous radio environment mapping (REM) in IoT networks is proposed that employs onboard interference identification and tracks the sources of wireless interference in space, time, and frequency. The approach ensures a dynamic level of REM detail and provides a powerful tool for predicting the IoT network performance and adapting the network parameters at run-time.

    Fulltekst tilgjengelig fra 2020-11-15 00:00
  • 78.
    Grimaldi, Simone
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Mahmood, Aamir
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Gidlund, Mikael
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Real-time Interference Identification via Supervised Learning: Embedding Coexistence Awareness in IoT Devices2019Inngår i: IEEE Access, E-ISSN 2169-3536, Vol. 7, s. 835-850Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Energy sampling-based interference detection and identification (IDI) methods collide with the limitations of commercial off-the-shelf (COTS) IoT hardware. Moreover, long sensing times, complexity and inability to track concurrent interference strongly inhibit their applicability in most IoT deployments. Motivated by the increasing need for on-device IDI for wireless coexistence, we develop a lightweight and efficient method targeting interference identification already at the level of single interference bursts. Our method exploits real-time extraction of envelope and model-aided spectral features, specifically designed considering the physical properties of signals captured with COTS hardware. We adopt manifold supervised-learning (SL) classifiers ensuring suitable performance and complexity trade-off for IoT platforms with different computational capabilities. The proposed IDI method is capable of real-time identification of IEEE 802.11b/g/n, 802.15.4, 802.15.1 and Bluetooth Low Energy wireless standards, enabling isolation and extraction of standard-specific traffic statistics even in the case of heavy concurrent interference. We perform an experimental study in real environments with heterogeneous interference scenarios, showing 90%–97% burst identification accuracy. Meanwhile, the lightweight SL methods, running online on wireless sensor networks-COTS hardware, ensure sub-ms identification time and limited performance gap from machine-learning approaches.

    Fulltekst (pdf)
    fulltext
  • 79.
    Grimaldi, Simone
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Martenvormfelde, Lukas
    Ostwestfalen-Lippe University of Applied Sciences, 326 57 Lemgo, Germany.
    Mahmood, Aamir
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Gidlund, Mikael
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Onboard Spectral Analysis for Low-complexity IoT Devices2020Inngår i: IEEE Access, E-ISSN 2169-3536, Vol. 8, s. 43027-43045Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The lack of coordinated spectrum access for IoT wireless technologies in unlicensed bands creates inefficient spectrum usage and poses growing concerns in several IoT applications. Spectrum awareness becomes then crucial, especially in the presence of strict quality-of-service (QoS) requirements and mission-critical communication. In this work, we propose a lightweight spectral analysis framework designed for strongly resource-constrained devices, which are the norm in IoT deployments. The proposed solution enables model-based reconstruction of the spectrum of single radio-bursts entirely onboard without DFT processing. The spectrum sampling exploits pattern-based frequency sweeping, which enables the spectral analysis of short radio-bursts while minimizing the sampling error induced by non-ideal sensing hardware. We carry out an analysis of the properties of such sweeping patterns, derive useful theoretical error bounds, and explain how to design optimal patterns for radio front-ends with different characteristics. The experimental campaign shows that the proposed solution enables the estimation of central frequency, bandwidth, and spectral shape of signals at runtime by using a strongly hardware-limited radio platform. Finally, we test the potential of the proposed solution in combination with a proactive blacklisting scheme, allowing a substantial improvement in real-time QoS of a radio link under interference.

    Fulltekst (pdf)
    fulltext
  • 80.
    Große, Christine
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Airports as Critical Infrastructure: The Role of the Transportation-by-Air System for Regional Development and Crisis Management2019Inngår i: 2019 IEEE International Conference on Industrial Engineering and Engineering Management (IEEM), 2019, s. 440-444, artikkel-id 8978905Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Regional airports constitute an important precondition for supply chains of goods and public services and particularly those of time-critical transports by air. However, common approaches for estimating the effects of airports on the regional economy have overlooked this essential role. This paper analyzes the interconnected role of a regional airport as a hub of critical infrastructure by applying a holistic system perspective to a Swedish case. Departing from a conceptual model, which was developed with soft systems methodology, the analysis provides novel insight into vital societal functions that are interconnected with aviation. Insights from interviews with stakeholders enrich the system model and thus provide suggestions for further developments of economic models that include the value of critical infrastructure for societal resilience.

  • 81.
    Große, Christine
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Sources of Uncertainty in Swedish Emergency-Response Planning2019Inngår i: Journal of Risk Research, ISSN 1366-9877, E-ISSN 1466-4461, Vol. 22, nr 6, s. 758-772Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    With the growing importance of enhancing modern society’s resilience, planning for critical infrastructure protection has become essential. However, such national planning must contend with many types of uncertainty. This paper characterises sources of uncertainty that are associated with a lack of knowledge, as exemplified by Swedish planning of emergency power supplies. The planning under investigation concerns civil protection from the negative effects of a power shortage. A decision process is intended to support this national strategic management goal by identifying and prioritising electricity consumers who are critical to society at the local, regional and national levels. The analysis of related documentation yields three sources of uncertainty (S) interrelated with this multi-level planning (MLP) for emergency response: (S1) the planning process in general, (S2) the decision-making process in particular and (S3) the direction and guidance alongside these processes. Interviews with decision-makers reveal a detailed specification of these sources of uncertainty. The results thus provide a solid basis for further goal-directed improvement of national MLP approaches. Moreover, this specification contributes to scholarly debate on the systemic effects of sources of uncertainty due to a lack of knowledge. Lastly, the findings constitute a thinking framework that is suggested as a foundation for analytical work in similar complex planning environments as well as for evidence-based communication to the wider public concerning risks and resilience.

    Fulltekst (pdf)
    fulltext
  • 82.
    Große, Christine
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Hahne, Matilda
    Mittuniversitetet, Fakulteten för humanvetenskap, Institutionen för humaniora och samhällsvetenskap.
    Olausson, Pär M.
    Mittuniversitetet, Fakulteten för humanvetenskap, Institutionen för humaniora och samhällsvetenskap.
    Svensson, Bo
    Mittuniversitetet, Fakulteten för humanvetenskap, Institutionen för humaniora och samhällsvetenskap.
    Regionala flygplatser: En förstudie kring betydelsen av regionala flygplatser för samhället2019Rapport (Annet vitenskapelig)
    Fulltekst (pdf)
    Regionala flygplatser
  • 83.
    Große, Christine
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Olausson, Pär M.
    Mittuniversitetet, Fakulteten för humanvetenskap, Institutionen för humaniora och samhällsvetenskap.
    Blind spots in interaction between actors in Swedish planning for critical infrastructure protection2019Inngår i: Safety Science, ISSN 0925-7535, E-ISSN 1879-1042, Vol. 118, s. 424-434Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Failures in the power supply threaten the safety of developed countries, as they are increasingly dependent on electricity to maintain important societal functions through critical infrastructure. To protect electricity-dependent critical infrastructure, Sweden has implemented a multi-level planning, called Styrel, which involves national-, regional- and local-level actors. This study focuses on interactions among key actors and their roles in the planning as well as the Swedish crisis management system. With evidence from interviews and a survey among the actors, analyses indicate blind spots in the current proceeding, such as the reliance of the outcome of the process on the actors’ commitment to achieve a common understanding of the importance of infrastructure assets and participate in collaborations. This paper reveals that actors lack awareness, knowledge, capability and resources to fulfil their roles in the national planning for critical infrastructure protection. By highlighting interrelations, this study contributes to the international discussion of identification, prioritisation and protection of critical infrastructure to mitigate consequences of power failures for a depending society.

  • 84.
    Große, Christine
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Olausson, Pär M.
    Mittuniversitetet, Fakulteten för humanvetenskap, Institutionen för humaniora och samhällsvetenskap.
    Svensson, Bo
    Mittuniversitetet, Fakulteten för humanvetenskap, Institutionen för humaniora och samhällsvetenskap.
    Den regionala flygplatsens roll i samhället - Perspektiv från en förstudie kring Sundsvall-Timrå flygplats2019Inngår i: Festskrift till Björn Fjæstad: Utvecklingen av en forskningsmiljö: Ett verksamhetsnära engagemang på distans / [ed] Erna Danielsson, Roine Johansson, Anna Olofsson, Susanna Öhman, Sundsvall: Mid Sweden University , 2019, s. 49-67Kapittel i bok, del av antologi (Annet vitenskapelig)
  • 85.
    Große, Christine
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Olausson, Pär M.
    Mittuniversitetet, Fakulteten för humanvetenskap, Institutionen för humaniora och samhällsvetenskap.
    Wallman Lundåsen, Susanne
    Mittuniversitetet, Fakulteten för humanvetenskap, Institutionen för humaniora och samhällsvetenskap.
    Blackout Ahead: Methodological Concerns in Studies of Critical Infrastructure Protection2019Inngår i: Proceedings of the 29th European Safety and Reliability Conference(ESREL) / [ed] Michael Beer and Enrico Zio, Singapore: European Safety and Reliability Association, 2019, s. 1715-1723, artikkel-id 304Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper highlights difficulties in studying the Swedish crisis management system with a specific focus on the planning process STYREL. This process seeks to identify and prioritize vital objects in the category of critical infrastructure (CI) in order to elaborate an emergency response plan for the case of a power shortage. The concerns in this paper originate from a research project on how actors assess CI and cooperate during the process as well as which consequences the prioritization of CI pose for society and its citizens. The project employed material from document studies in addition to interviews with security officers at municipalities, coordinators at CountyAdministrative Boards (CABs), and representatives from power grid operators (PGOs). Furthermore, a survey was conducted among all CABs and the ten PGOs that are responsible for effectuating the plan within the initial phaseof a power shortage. The results reveal problems regarding the availability of relevant planning material, gaps in knowledge due to deficient continuity, difficulties in tracing particular objects during the process, and a lack of feedback that hampers evaluation and development. Thus, Swedish critical infrastructure protection (CIP) suffers from not only a shift in responsibility to regional and local actors but also a severe lack of systemic governance.

  • 86.
    Gustavsson, André
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Issa, Nicole
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Hållbara kontra konventionella fonder: En prestationsstudie om passivt och aktivt förvaltade fonder2019Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Every fourth Swede chooses to invest their capital in sustainable funds. There is consensus on the fact that the financial market has been affected by the increased awareness on sustainability which companies have embraced and now manage extensive CSR-work. The goal of this essay is to answer the question whether sustainable funds contributes larger to a portfolios risk adjusted return than conventional mutual funds and if there is a connection between that and passive or active fund management. The report compares 16 funds between the years of 2012 to 2018, whereas 8 funds are conventional and 8 are sustainable. Furthermore, half of each group is passively managed and half is actively managed. The ratios used to measure risk adjusted return in this essay is the Sharpe ratio and the Sortino Ratio. The results show that the conventional funds have a higher risk adjusted return than the sustainable funds. The result is further compared to previous research and discussed towards the hypotheses presented in the theory chapter.

    Fulltekst (pdf)
    fulltext
  • 87.
    Gyllin, Åse
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Elektroniska signaturer: -      ”Det kommer ju rasande snabbt det här.”2019Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    För en arkivarie är autenticitet en viktig del i arkivet, att kunna bevisa olika typer av informations äkthet. I takt med att tekniken utvecklas kommer också nya möjligheter. Möjligheterna kommer tillsammans med frågor och diskussioner om hur detta ska gå att bevara den dagen informationen ska arkiveras.

    Att kunna signera en handling på distans öppnar upp möjligheter för ett snabbare och mer flexibelt arbetssätt. I vissa fall är det även säkrare. Det kan spara tid, kostnader och ge medborgare, företag och myndigheter alternativ till vad som krävs för en handskriven signatur. Frågan är hur långt myndigheter har kommit i användningen av dessa signaturer och hur de hanteras när de når arkivet. Elektroniska signaturer kan ge verksamheter en chans till ett smidigare sätt att arbeta, men de innebär också vissa utmaningar när de ska hanteras.

    Den här uppsatsen är en studie av olika verksamheters arbete kring ämnet elektroniska signaturer. Resultatet kommer från intervjuer med fyra olika myndigheter och totalt sex respondenter där jag frågat om deras hantering av elektroniska signaturer i dagsläget, vad de tror om utvecklingen samt vilka utmaningar de ser. Resultatet visar på en variation i arbetet kring dessa frågor och även olikheter i vilka behov man har av utveckling och projekt angående dessa signaturer.

     

    Fulltekst (pdf)
    fulltext
  • 88.
    Hassan, A.
    et al.
    COMSATS University, Islamabad, Pakistan.
    Ghafoor, M.
    COMSATS University, Islamabad, Pakistan.
    Tariq, S.A.
    COMSATS University, Islamabad, Pakistan.
    Zia, T.
    COMSATS University, Islamabad, Pakistan.
    Ahmad, Waqas
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    High Efficiency Video Coding (HEVC)–Based Surgical Telementoring System Using Shallow Convolutional Neural Network2019Inngår i: Journal of digital imaging, ISSN 0897-1889, E-ISSN 1618-727X, Vol. 32, nr 6, s. 1027-1043Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Surgical telementoring systems have gained lots of interest, especially in remote locations. However, bandwidth constraint has been the primary bottleneck for efficient telementoring systems. This study aims to establish an efficient surgical telementoring system, where the qualified surgeon (mentor) provides real-time guidance and technical assistance for surgical procedures to the on-spot physician (surgeon). High Efficiency Video Coding (HEVC/H.265)–based video compression has shown promising results for telementoring applications. However, there is a trade-off between the bandwidth resources required for video transmission and quality of video received by the remote surgeon. In order to efficiently compress and transmit real-time surgical videos, a hybrid lossless-lossy approach is proposed where surgical incision region is coded in high quality whereas the background region is coded in low quality based on distance from the surgical incision region. For surgical incision region extraction, state-of-the-art deep learning (DL) architectures for semantic segmentation can be used. However, the computational complexity of these architectures is high resulting in large training and inference times. For telementoring systems, encoding time is crucial; therefore, very deep architectures are not suitable for surgical incision extraction. In this study, we propose a shallow convolutional neural network (S-CNN)–based segmentation approach that consists of encoder network only for surgical region extraction. The segmentation performance of S-CNN is compared with one of the state-of-the-art image segmentation networks (SegNet), and results demonstrate the effectiveness of the proposed network. The proposed telementoring system is efficient and explicitly considers the physiological nature of the human visual system to encode the video by providing good overall visual impact in the location of surgery. The results of the proposed S-CNN-based segmentation demonstrated a pixel accuracy of 97% and a mean intersection over union accuracy of 79%. Similarly, HEVC experimental results showed that the proposed surgical region–based encoding scheme achieved an average bitrate reduction of 88.8% at high-quality settings in comparison with default full-frame HEVC encoding. The average gain in encoding performance (signal-to-noise) of the proposed algorithm is 11.5 dB in the surgical region. The bitrate saving and visual quality of the proposed optimal bit allocation scheme are compared with the mean shift segmentation–based coding scheme for fair comparison. The results show that the proposed scheme maintains high visual quality in surgical incision region along with achieving good bitrate saving. Based on comparison and results, the proposed encoding algorithm can be considered as an efficient and effective solution for surgical telementoring systems for low-bandwidth networks.

  • 89.
    Hasselblad, Annika
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Welfare Technology Policy and Practice – A Conceptual Analysis2019Inngår i: 2019 IEEE International Conference on Industrial Engineering and Engineering Management (IEEM) / [ed] IEEE, Macau: IEEE, 2019, s. 69-73, artikkel-id 8978893Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This exploratory study identifies two existingconceptions of welfare technology identified from policy and practice. By using policy documents and previous research together with a survey of primary care managers and students, this paper identifies one wider and one narrower conception. The wider tends toinclude the whole society, making it difficult to specify end-user requirements, while the narrower focuses on the more vulnerable people in society, which can exclude possible users.

    Fulltekst (pdf)
    fulltext
  • 90.
    Hasselblad, Annika
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Olsson, Leif
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Blusi, Madeleine
    Department of FoU Västernorrland.
    A Conceptual Model to Evaluate Technology Implementations: a Home Care Case Study2019Inngår i: 2019 IEEE International Conference on Industrial Engineering and Engineering Management (IEEM) / [ed] IEEE, Macau: IEEE, 2019, s. 74-78, artikkel-id 8978745Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Digitalisation in the form of new technologies and solutions is a rapid movement affecting the whole world.Home or assistive care has had a long period of trouble trying keep up, even though it is a promising area of application. As home care tries to catch up, rushing to implement technologies or IT systems can result in misfit solutions that do not satisfy their purpose. The values of healthcare meanthat measuring success of technology implementation is different than in production sectors. The main focus is patient satisfaction and should, therefore, also be included in any evaluation. The present study proposes a conceptual model that aims to facilitate considering both quantitative and qualitative data, including patient and caregiver values, whenmeasuring efficiency in healthcare management. The model combines multi-criteria decision analysis (MCDA) and data envelopment analysis (DEA) to make it possible to handle both crisp and fuzzy values. The model is tested and evaluated using a home care case study, which shows promising results.

    Fulltekst (pdf)
    fulltext
  • 91.
    Humble, Niklas
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för data- och systemvetenskap.
    Mozelius, Peter
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för data- och systemvetenskap.
    Sällvin, Lisa
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    On the Role of Unplugged Programming in K-12 Education2019Inngår i: Proceedings of the 18th European Conference on e-Learning, ECEL / [ed] Rikke Ørngreen, Mie Buhl and Bente Meyer, Reading, UK: Academic Conferences and Publishing International Limited, 2019, s. 224-230Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The integration of programming in K-12 setting is a global phenomenon with different implementations in different countries. In Sweden this is a rapid process where programming should be a part of K-12 mathematic and technology with an implementation during 2018 and 2019. The time frame has been narrowly defined, but there are few directives considering which types of programming that should be used. Three main programming types are textual programming, block programming and unplugged programming, this study has a focus on unplugged programming. The research question to answer was: Which are K-12 teachers attitudes on the role of unplugged programming in education? 

    The research study has been a qualitative cross-sectional study with the aim to collect teachers' attitudes towards unplugged programming halfway through their introductory programming course. Cross-sectional study is an approach to capture snapshots of an ongoing process at a given point in time. Data were collected from discussions and online postings during a workshop in the above-mentioned programming course. Participants postings have been grouped into categories in a content analysis based on the frequency of occurrence and relevance for answering the research question. 

    Findings show that most teachers see a benefit of unplugged programming as a means to learn the fundamental programming concepts in their teaching and learning activities. However, there are different opinions on when this unplugged introduction should occur. Some teachers also pointed out that unplugged programming could be used as an alternative to block programming and textual programming when the digital environment lacks or fails. Conclusions are that unplugged activities are a valuable complement to block programming and textual programming, but teachers have different opinions on the optimum age group for unplugged programming activities. The recommendations for K-12 teachers is to seriously consider the unplugged complement, both for pedagogical reasons and as a never-failing analogue backup. 

    Fulltekst (pdf)
    fulltext
  • 92.
    Humble, Niklas
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för data- och systemvetenskap.
    Mozelius, Peter
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för data- och systemvetenskap.
    Sällvin, Lisa
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Teacher Challenges And Choice Of Programming Tools For Teaching K-12 Technology And Mathematics2019Inngår i: Education and new developments (END2019) / [ed] Mafalda Carmo, Porto, Portugal: inScience Press, 2019, Vol. 1, s. 431-435Konferansepaper (Fagfellevurdert)
    Abstract [en]

    A current ongoing process in many countries today is to implement programming in K-12 education. With this comes challenges for the involved teachers on how to best teach and integrate programming in their subjects. On the other hand, the introduction of programming could also open opportunities for programming as a new and improved way of learning and understanding technology and mathematics. For Swedish K-12 teachers this should be rapidly implemented, but without any concrete guidelines for how or for which tools to use. The aim of this study was to explore teachers' perceptions of learning and integrating programming in technology and mathematics, and their preferences of programming tools. 

    The overall research strategy was a case study approach, with two instances of a programming course as the case study units. In both course instances the main choice has been between block programming with Scratch, and textual programming with Python. Data was collected in a combination of submitted essays, programming assignments and workshop observations. Findings from a content analysis of the submitted essays have been compared to workshop observations, and to the analysis of programming assignments. 

    Results suggests that the main challenge in learning and integrating programming is the perceived time trouble. In parallel, many teachers highlight the potential benefits of renewing their teaching and learning sessions with programming-based problem solving. Considering the choice between block programming and textual programming several teachers brings up the idea of combining the two rather than excluding one of them. Furthermore, there seems to be minor differences in the preferences of programming tools between teachers with different subjects and different age groups of students. Finally, the most positive finding is the improved self confidence that many teachers show, when their own ability to manage programming in their classrooms increase after learning the fundamentals of programming.  

    Fulltekst (pdf)
    fulltext
  • 93.
    Humble, Niklas
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för data- och systemvetenskap.
    Sällvin, Lisa
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Mozelius, Peter
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för data- och systemvetenskap.
    Programmering i matte och teknik2019Annet (Annet (populærvitenskap, debatt, mm))
    Abstract [sv]

    Att introducera programmering i grund- och gymnasieskola är en pågående process i många länder. I Sverige ska detta inledningsvis ske som en del av matematik och teknik där programmering är tänkt att användas som ett verktyg för problemlösning. Flera forskningsstudier har presenterat vilka fördelar detta skulle kunna föra med sig, men det är svårare att hitta riktlinjer för hur det ska genomföras. Till exempel, hur och när yrkesverksamma lärare ska fortbilda sig inom grundläggande programmering.

    Författarna till den här artikeln är samtliga undervisande lärare på en programmeringskurs på Mittuniversitetet som riktar sig specifikt till yrkesverksamma lärare i matematik och teknik på grund- och gymnasienivå.

    I samband med att denna kurs har gått så har forskning bedrivits utifrån två huvudsakliga frågor: 1) Vilka hinder och möjligheter ser lärare i att integrera programmering i matematik och teknik? 2) Vilka styrkor och svagheter ser lärare med att använda textbaserad, block- och analog programmering som verktyg i matematik och teknik?

    Resultaten från dessa studier har publicerats på internationella konferenser. Nedan följer en kortare introduktion till några centrala begrepp inom forskningsfältet samt en sammanfattning av de mest framträdande resultaten från vår forskning.

  • 94.
    Jansson, Herman
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Smarta Blanketter: Dynamiskt webbformulär2019Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Digitization is a fundamental importance for society and something that is constantly sought. Several organizations have not yet digitized various document-based processes, which makes the development difficult since statistical analyzes are time-consuming and costly. CSN is one of the many companies that has still not been able to digitalize their paper forms and has the ambition to replace them all in the least expensive way and as fast as possible. Today, the company stands between buying a service that has applied digitalized solution or implementing its own. This study will explore how a dynamic web form can be implemented to meet the company's ambitions, which will be called “Smarta Blanketter” and stands for Smart forms in English. The possibilities and requirements that can be featured in a digitized solution will be investigated to simplify the customer process and make the underlying process at companies more flexible. Because of the project’s short timeframes, the usability and the dynamic functionality of “Smarta Blanketter” have been prioritized, some visual tool that simplifies the creation of new web forms has not yet been implemented. E-ID signatures, filling of PDF files, and navigation based on previous answer options are just some of the dynamic features applied in “ Smarta Blanketter ” . In order to evaluate whether the dynamic solution improves the customer process, a usability test has been carried out in which the testers fill in an earlier paper application versus the same application inserted in “ Smarta Blanketter ” . The result indicates that the web form optimizes the customer process as customers respond faster and only to necessary questions. Additions of incomplete applications have previously been an issue with the paper forms, which could be completely excluded when filling-in support and validation checks were applied. Replacing CSN's paper applications, could reduce or potentially completely exclude their current budget of ten million Swedish crowns used for sending out their paper forms. The solution that has been designed is not only adapted for the company in this project but can be used for other organizations that have similar paper applications.

    Fulltekst (pdf)
    fulltext
  • 95.
    Johansson, Marcus
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Dashboard: Ett program som ska underlätta felsökning2019Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    The goal of this investigation has been to answer the questions “Which graphs should be used to display a special type of information?”, “What information does a company need to know that a server has gone down?” and “How should the layout of the developed program look to be called easy to understand and nice to use?”. The investigation was helped by the use of user-interviews and information that was collected during meetings. Part of the work was also the development of a prototype of a so called “dashboard” where functions where tested. These tests were then used to find out if the information was showed in a suitable manner. The information gained from these earlier tests has then been compiled into a result which shows that it is important to use y-over time graphs to show information over time. Fraction based information such as pro- cents are best showed with a filling graph, such as the speedometer graph. The second question was easily answered with a simple questionnaire. The result of this questionnaire showed that it was important for companies to know how much of the servers resources was used and how much data that was sent and received. Regarding the last question, the only notable result was the fact that the UI of the prototype was to light. This resulted in a color change for the UI to the darker spectrum.

    Fulltekst (pdf)
    fulltext
  • 96.
    Karelius, Martin
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Kundportal2019Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Abstract [en]

    Dynamic Precision is a company in Herrljunga focused on electronics. A branch of Dynamic Precision is repairs of electronic equipment from third party companies and they send electronic equipment from their end-customers to Dynamic Precision that repair the units and then return them, usually direct to the end-customer. Dynamic Precision had need of a customer portal so that their customers could check the status of their sent in equipment and this customer portal became an internship project. The project was developed in ASPNET Core and its database was created in Microsoft SQL-Server. The project has been completed with somewhat intact time-planning, even though the construction of the middleware took longer time than planned. The focus of the project has been on creating a usable and secure application and a reasonable secure solution has been reached. The planned amount of users is very low, but it still needs to have its accessibility improved so that a users possible handicap wont stop the user from using the application.

    Fulltekst (pdf)
    fulltext
  • 97.
    Karlsson, Karl-Johan
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    New public management i arkivredovisning: Om Riksarkivets kommunikation kring verksamhetsbaserad arkivredovisning2018Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Uppsatsen är en kritisk diskursanalys av Riksarkivets kommunikation kring verksamhetsbaserad arkivredovisning utifrån informationen på riksarkivets hemsida, och med ett särskilt fokus på förekomsten av spår av New Public Management. Huvudmaterialet består av Riksarkivets FAQ, och som sidomaterial används även Riksarkivets allmänna föreskrifter.

    Utifrån analytiska begrepp som transitivitet, modalitet, intertextualitet med flera analyseras materialet för att komma fram till slutsatsen att Riksarkivets kommunikation inte innehåller några problematiska mängder spår av New Public Management, och uppsatsen skriver in sig i arkiv- och informationsvetenskapen genom att anknyta till det första steget som tas vid införande av verksamhetsbaserad arkivredovisning.

    Fulltekst (pdf)
    fulltext
  • 98.
    Kazimi, Basit
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Tillämpning av blockchain inom food supply chain management2019Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Background: As a result of food supply chain management, we have access to fresh food from all around the world. But there are some encounters that food supply chain has to deal with. The E. coli outbreak in the US is an illustrative of a widespread problem faced by the food supply chain.

     

    Purpose: The purpose of the study is to examine how blockchain technology can be used in food supply chain management and see what the interest of the customer looks like.

     

    Method: The methodology of the research to examine how blockchain can be used in food supply chain management was through literature study, and questionnaire to get a better grasp of the customers interest.

     

    Result: By using blockchain technology in food supply chain management it improves the information flow, while becoming more transparent between the actors. Blockchain technology improves the security of FSCM and traceability of a product. You can automatize several processes of FSCM by using smart contracts and sensors. From the survey it was a found that there is an interest in the customers side and about two-thirds of the customer might pay extra if the products use blockchain technology.

     

    Conclusion: Blockchain’s features makes it ideal to be integrated in the food supply chain management, as it makes it harder to counterfeit the products, and it improves the trust between the actors by ensuring transparency of the information flow. But on the other hand, blockchain is not suitable for everyone, as it’s a complicated system and it can result in high switching cost when changing systems.

     

    Fulltekst (pdf)
    fulltext
  • 99.
    Kervel Barth, Alette Jerring van
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    Cloudbaserte systemer – deskriptiv beslutningsmodell: Fra litteraturens, kundens og leverandørens perspektiv2019Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [no]

    Teknologi er altomfattende og oppslukende. Teknologiutvikling aksele-rerer raskere hver eneste dag, og kan raskt bidra til å skape et skille mellom de aktører som følger utviklingen og de som uteblir fra utvik-lingen.  Tilfører cloudbaserte og cloud computing nytte til bedriften eller er det kun en IT-trend? Hensikten med dette studiet er derfor å skape en beslutningsmodell som skal avgjøre om bedriften skal implementere et cloudbasert system eller bevare de systemer de har i dag i et  on-premises miljø. Beslutningsmodellen skal belyse ulike kriterier innen cloudbaserte løsninger. Studien skal utformes med hjelp av TOE-rammeverket (teknologi, organisasjon og miljø). Målet med studien er å besvare følgende forskningsspørsmål: (1) hvilke konsekvenser og nytteverdier medfører cloudbaserte systemer? (2) hvilke forskjeller er det mellom kriteriene i litteraturen og det som utføres i praksis? (3) finns det forskjeller på synspunktene til leverandøren og kunden rundt dette fagområdet? Resultatet bygger på kvalitative intervjuer med personer fra leverandøren av tjenesten og kunden. I tillegg har det blitt gjennom-ført et intervju med en ekstern ekspert, for å evaluere og støtte opp under resultatet fra gjennomførte  intervjuer. Undersøkelsen har resul-tert i en beslutningsmodell med to alternativ og elleve kriterier. Analy-sen viser at det er forskjeller  på hvilke kriterier litteraturen vektlegger sammenlignet med de kriterier som benyttes i praksis. Det er også forskjeller mellom de synspunkter som mellom leverandøren utrykker sammenlignet med og kundens synspunkter. Kunden ønsker ikke  å miste kontrollen og opplever en innlåsingseffekt. Leverandøren derimot ønsker å levere den nyeste teknologien samt bidra til økt stimulering gjennom effektivisering av arbeidsprosesser og rutiner. Dette bidrar til å stimulere og utfordre den enkelte ansatte.  Studien kan konkluderes på følgende måte: hovedårsaken for å ikke implementere cloudbaserte system for kunden er; innlåsing, investering og driftskostnad og risiko for tap av kontroll. Hovedårsaken  for å implementere et cloudbaserte system for leverandøren er; organisasjonens mulighet til å jobbe med nyeste teknologi stimulerer til økt konsulent utvikling, funksjonalitet og tilgjengelighet.

    Fulltekst (pdf)
    fulltext
  • 100.
    Khisro, Jwan
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationssystem och –teknologi.
    The relation between the interoperability and data quality concepts: A study of the Swedish electricity market collaborationsInngår i: Artikkel i tidsskrift (Annet vitenskapelig)
1234 51 - 100 of 187
RefereraExporteraLink til resultatlisten
Permanent link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf