Digitala Vetenskapliga Arkivet

Change search
Refine search result
1234567 51 - 100 of 5463
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 51.
    Agrell, Fredrik
    KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Machine Design (Div.).
    Control of HCCI by aid of Variable Valve Timings with Specialization in Usage of a Non-Linear Quasi-Static Compensation2006Doctoral thesis, comprehensive summary (Other scientific)
    Abstract [en]

    This doctoral thesis is about controlling the combustion timing of the combustion concept Homogeneous Charge Compression Ignition, HCCI, by means of variable valve timings.

    The HCCI research usually is regarded to have started in Japan during the later part of the 1970´s. The world of HCCI has since grown and HCCI is of today researched worldwide. Of particular interest from a Swedish point of view is that Lund Institute of Technology has emerged as one of the world leading HCCI laboratories.

    The idea with HCCI is to combine the Otto and Diesel engine. As in an Otto engine the charge is premixed but as in a Diesel engine the operation is unthrottled and the compression heat causes the ignition. The combustion that follows the ignition takes place homogeneously and overall lean. The result is ultra low NOx and particulate emissions combined with high total efficiency. A difficulty with the HCCI-concept is that it only works in a narrow area and that there is no direct way to control the Start Of Combustion, SOC. Out of this follows that timing/phasing of the combustion is one of the main difficulties with HCCI combustion concepts. This is particularly emphasized during transient operation and calls for feedback control of the combustion timing.

    This work investigates one method, the variable valve timing, to achieve feedback control of the combustion phasing. From the work it can be concluded that the variable valve timing can control the combustion phasing during engine transients. In order to improve the performance a non-linear compensation from ignition delay to valve timings has been suggested, incorporated in a control structure and tested in engine test. The engine test has been performed in a single cylinder engine based on a Scania truck engine. The speed range from 500 to 1750 rpm and the load range 1.26 and 10.5 bar of netIMEP has been covered with fair transient performance.

    Download full text (pdf)
    FULLTEXT01
  • 52.
    Aguilera, Rafael
    University of Gävle, Department of Technology and Built Environment.
    Implementation of a ceramic coating based upon the concept of emissivity2008Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
  • 53.
    Ahl, Matilda
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Civil and Industrial Engineering, Industrial Engineering and Management.
    Hållbar utveckling: Utveckling av en organisations hållbarhetsarbete genom benchmarking2020Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Work with sustainable development can result in several benefits to an organization and is above all important when it comes to the organization's opportunities to handle the changes in the world around it and survive in the long run. Previous research shows, however, that it is not an easy task to conduct successful work with sustainable development, partly due to conflicting aspects and lack of guidance regarding which strategies, methods or activities that need to be implemented to achieve the desired result. Making decisions regarding how competent work with sustainable development should be conducted and developed is therefore difficult, which is why a case study has been carried out in order to assess how a specific organization can develop the work with sustainable development based on the benchmarking method Sustainability Progress Indicator Comparative Evaluation (SPICE). Based on this method, which is specifically developed for benchmarking regarding organizations' sustainability work, several of the mistakes that can undermine an organization's work with sustainable development could be studied and assessed. In this way, it became possible to assess the current situation of the specific organization based mainly on public information, but also to identify differences in performance and learn from the competitors in the energy and communications industry who have come further with their sustainability work. It then emerged that the organization's competitors are making more progress and conducting more extensive work with sustainable development, which was judged to be due to the specific organization lacking sufficient knowledge in the area. Due to the fact that knowledge, constant learning and development work form the basis for successful sustainability work, training of the organization's employees was therefore recommended in the first place. How the organization's sustainability work should be developed thereafter is not answered by the case study, however, which is why the necessary guidance to some extent is still lacking. It is therefore important that further investigation is carried out.

  • 54.
    Ahlberg, Anton
    Luleå University of Technology, Department of Arts, Communication and Education, Media, audio technology and experience production and theater.
    Perceived audio quality of compressed audio in game dialogue2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    A game could have thousands of sound assets, to fit all of those files to a manageable storage space it is often necessary to reduce the size of the files to a more manageable size so they have to be compressed. One type of sound that often takes up a lot of disc space (because there is so much of it) is dialogue. In the popular game engine Unreal Engine 4 (UE4) the the audio is compressed to Ogg Vorbis and has as default the bit rate is set to 104 kbit/s. The goal of this paper is to see if untrained listeners find dialogue compressed in Ogg Vorbis 104 kbit/s good enough for dialogue or if they prefer higher bit rates. A game was made in UE4 that would act as a listening test. Dialogue audio was recorded with a male and a female voice-actor and was compressed in UE4 in six different bit rates. 24 untrained subjects was asked to play the game and identify the two out of six robots with the dialogue audio they thought sound the best. The results show that the subjects prefer the higher bit rates that was tested. The results was analyzed with a chi-squared test which showed that the null-hypothesis can be rejected. Only 21% of the answers were towards UE4s default bit rate of 104 kbit/s or lower. The result suggest that the subjects prefer dialogue in higher bit rates and UE4 should raise the default bit rate.

    Download full text (pdf)
    fulltext
  • 55. Ahlberg, Simon
    et al.
    Hörling, Pontus
    Jöred, Karsten
    Lindström, Björn
    Mårtenson, Christian
    Neider, Göran
    Schubert, Johan
    Sidenbladh, Hedvig
    Svenson, Pontus
    Svensson, Per
    Unden, Katarina
    Walter, Johan
    The IFD03 information fusion demonstrator2004In: Proceedings of the Seventh International Conference on Information Fusion, FUSION 2004, 2004, p. 936-943Conference paper (Refereed)
    Abstract [en]

    The paper discusses a recently developed demonstrator system where new ideas in tactical information fusion may be tested and demonstrated. The main services of the demonstrator are discussed, and essential experience from the use and development of the system is shared.

  • 56.
    Ahlbäck, Joel
    et al.
    Halmstad University, School of Information Technology.
    Jalking, Jesper
    Halmstad University, School of Information Technology.
    Logistikföretag i försörjningskedjan: Rekommendationer till logistikföretag i hanteringen av informationssäkerhet2021Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Information security is an important aspect when running a business. Before, information security has been separated to the business area of IT. But lately this issue has broadened and become an important part of business-activity. This has resulted in a growing interest among business leaders. Literature within the subject information security mainly focuses on how organizations maintain safe systems and protect themselves from cyber-attacks and information infringements. Existing literature identifies new security threats that have emerged after advances in internet technology, but little is known about how these threats can be managed. Researchers request research on how cooperation in supply chains poses risks to secure information management. Logistics companies provide customers with logistics services such as warehouse management, transport, order processing and packaging. Logistics companies are a central node in supply chains. They often participate in several supply chains in different industries. The extensive interconnection of companies poses a security risk. It also means that logistics companies can be seen as targets for cyber-attacks. The purpose of the study has therefore been to create an understanding of the challenges logistics companies face in managing information security in the supply chain.

     

    The research question has been answered by interviewing representatives from logistics organizations. The empirical data has undergone a thematic analysis. The results of the study show that the management of information security varies between companies. The study’s conclusions present recommendations. The recommendations describe how logistics companies can manage information security in the supply chain.

    Download full text (pdf)
    fulltext
  • 57.
    Ahlin, Katarina
    et al.
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, The Institute of Technology.
    Bredin, Sanna
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, The Institute of Technology.
    European Aviation Crisis Management2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Our aim is to investigate and evaluate the efficiency of crisis management in European aviation, and to recommend enhancements. To fulfill this, we mapped the current crisis management plans and created a fictive scenario where a cyber-attack shut down the power at five of the major airports in Europe. Air traffic in Europe was reconstructed to a chosen day; the 16th of September 2013, and the reconstructed traffic situation was used in the scenario. We also created a model, for the purpose of showing the effect of a cut in time for the steps in the crisis management plan may have on the traffic waiting to depart at the closed airports. When using these means, we could implement the crisis management plans on the fictive scenario and make changes to the plans for a new implementation. The existing crisis management plans were compared to the modified plans made by us, and it was found that usage of a common platform for the different stakeholders involved in the crisis could improve the efficiency of the crisis management.

    Download full text (pdf)
    fulltext
  • 58.
    Ahlqvist, Carolina Marianne
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Projektorganiseringen som drivkraft och hinder för industriell förnyelse i byggindustrin: en fallstudie av Skandionkliniken2014Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Understanding how innovation and renewal occurs in an industry is important for how to manage technical development for individual companies. It is also important for creating a beneficial industrial context for renewal, from both a political and an industrial perspective, in which new solutions can arise and spread through the involvement of several actors of the industry. How innovation and renewal occurs in the construction industry in Sweden is however viewed differently. One challenge that has been pointed to is that most of the work performed in the construction industry is organized in projects, which in turn should affect how innovation and renewal can be achieved.

     

    The aim of this thesis is to provide an understanding of how the project organizing in the industry affects innovation and renewal. This is executed through a case study of the construction of Skandionkliniken, a proton therapy clinic, and by using an industrial network theory that challenges the traditional view of how innovation is achieved. One important understanding drawn from this study is that renewal is created in the interface between companies and their resources. The kinds of innovation and renewal that can take place in the projects highly rely on technical interdependencies and organizational features of the involved actors. Three conclusions are drawn from this study; firstly, innovation and renewal in the construction industry occurs gradually across projects, secondly, the type of innovation that occurs is not what is expected from a traditional point of view, and thirdly, therefore it is not necessarily obvious when or how it takes place, which has implications both for policy and company management.

    Download full text (pdf)
    fulltext
  • 59.
    Ahlqvist, Theresé
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information and Communication systems.
    Hur ett tvärfunktionellt samarbete kan motverka stuprörsstrukturer: Kommunikationens roll i det organisatoriska gränssnittet mellan olika avdelningar2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Stovepipes, or also called silos, appear in many different organizations and sectors and contribute to problems when employees or managers tend to look more to their own, or the individual departments, objectives rather than to the organizations. The purpose of this study was to identify different communicative factors that promote stovepipes in order to further identify the most critical factor to disarm. A case study has been done at a selected company, with a stovepipe structure, in order to achieve the purpose of the study. The case study has included interviews and observations to identify different problem areas which then have been compared with three communicative factors identified in previous studies. The factor that had the most connections to the problem areas have been considered the most critical factor. The result of the study indicates that “A lack of understanding each other's work” is the most critical factor in stovepipe structures and that it can be prevented by following five recommendations: bring up positive collaboration continually, raise problems with each other instead of with others, identify different communication paths in and between the departments, implement a long-term model for preventing stovepipes and set up workshops between the involved departments. The conclusion of the study is that stovepipes create several undesirable effects in the organization but that the efforts to counter these problems do not have to be complicated. Following five small steps into a better collaboration and communication can be enough to be on your way to a better organizational structure.

    Download full text (pdf)
    fulltext
  • 60.
    Ahlqvist, Theresé
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    "Är det alltid negativt att vara konservativ?": En problematisering av stämplingen av byggbranschen som konservativ2018Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    When investigating the construction industry's lack of digitization, it is often explained that it is because of a conservative culture. The purpose of this study has been to problematize the labelling as conservative and to study a company in the industry to gain a deeper understanding of what other problems that may exist. Based on this, three research questions were identified which the study had as a goal to answer. These are: how the construction industry can be said to be conservative, how the conservatism is expressed, and what other barriers that exists that cannot be said to be derived from conservatism. The study has been conducted through a case study at Skanska Sverige AB with Region Hus Norr as a delimitation. Furthermore, it has been divided into two phases where semi-structural interviews and a document review have been used as the basis for a description of the current situation. The result shows that it is not a representative state of the construction industry to say that it is conservative, and during the case study no underlying expressions of conservatism was observed. On the other hand, there are several other areas that are considered as the reason for a slow development. The conclusions drawn is that the way the Swedish Public Procurement Act is conducted today is one of the reasons for this. An accelerated change process where some steps in the change management models are skipped is also seen as a reason. Furthermore, there are signs of that the current processes not always support efficient digitization, which indicates that the work in some cases only move from an analog to a digital state. Lastly, an indication of a stove pipe structure in the development area has been observed during the study, which can affect the efficiency and target improvement in a negative way.

    Download full text (pdf)
    fulltext
  • 61.
    Ahlqvist, Theresé
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    "Är det alltid negativt att vara konservativ?": En problematisering av stämplingen av byggbranschen som konservativ2018Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    When investigating the construction industry's lack of digitization, it is often explained that it is because of a conservative culture. The purpose of this study has been to problematize the labelling as conservative and to study a company in the industry to gain a deeper understanding of what other problems that may exist. Based on this, three research questions were identified which the study had as a goal to answer. These are: how the construction industry can be said to be conservative, how the conservatism is expressed, and what other barriers that exists that cannot be said to be derived from conservatism. The study has been conducted through a case study at Skanska Sverige AB with Region Hus Norr as a delimitation. Furthermore, it has been divided into two phases where semi-structural interviews and a document review have been used as the basis for a description of the current situation. The result shows that it is not a representative state of the construction industry to say that it is conservative, and during the case study no underlying expressions of conservatism was observed. On the other hand, there are several other areas that are considered as the reason for a slow development. The conclusions drawn is that the way the Swedish Public Procurement Act is conducted today is one of the reasons for this. An accelerated change process where some steps in the change management models are skipped is also seen as a reason. Furthermore, there are signs of that the current processes not always support efficient digitization, which indicates that the work in some cases only move from an analog to a digital state. Lastly, an indication of a stove pipe structure in the development area has been observed during the study, which can affect the efficiency and target improvement in a negative way.

    Download full text (pdf)
    fulltext
  • 62.
    Ahlqvist-Juhlin, Maria
    et al.
    Luleå University of Technology, Department of Arts, Communication and Education, Media, audio technology and theater.
    Guermouche, Oscar
    Luleå University of Technology, Department of Arts, Communication and Education, Media, audio technology and theater.
    Koblanck, Maria
    Konstnärliga utbildningar och vetenskap: ett exempel från Luleå Tekniska Universitet2014In: NU 2014: Umeå 8-10 oktober : abstracts, Umeå: Umeå universitet. Pedagogiska institutionen , 2014, p. 179-Conference paper (Refereed)
    Download full text (pdf)
    fulltext
  • 63.
    Ahlström, Emil
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Civil and Industrial Engineering, Industrial Engineering and Management.
    Fors, Per
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Civil and Industrial Engineering, Industrial Engineering and Management.
    Play hard, work harder: Workification of gaming in a Swedish World of Warcraft Classic guildIn: Ephemera : Theory and Politics in Organization, ISSN 2052-1499, E-ISSN 1473-2866Article in journal (Refereed)
    Abstract [en]

    This paper sets out to problematize and further develop the concept of workification in studies on the intersection of play and work. The literature on workification is scarce and focuses mainly on how game design transforms potentially playful activities in games into work-like tasks. In this study, which utilizes material from interviews and autoethnography, we illustrate the transformation of a World of Warcraft Classic guild, evolving from an informal gathering of friends into a structured organization with clear hierarchies and defined functions. By adopting the theoretical perspective of dominant logic, we show how the governing values and decision premises of the studied organization create a balancing act for management. The differing values of individuals within the organization led to the creation of administrative tools and rules to govern the organization’s members. Our conceptualization of workification emphasizes how aspects traditionally related to work – such as task management and organizational hierarchies – are being employed by guilds to enable new ways of enjoying the gaming experience. Committed players devote time and effort to producing spreadsheets, codes of conducts, and performance indicators, in addition to actually playing the game. While this may detract from the ‘magic’ of the game, we argue that workification can also offer new opportunities for playfulness and enjoyment.

  • 64.
    Ahmadi, Mostafa
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Civil and Industrial Engineering.
    Chamoun, Afram
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Civil and Industrial Engineering.
    Artificiell intelligens som beslutsfattande medel vid ROT-arbeten: En kvalitativ intervjustudie för kartläggning av beslutfattningsprocessen2021Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The construction industry stands for a third of the total carbon dioxide emissions globally , this includes the building process as well as the usage of the buildings. This in combination with the need for renovating older buildings in Sweden can lead to additional stress on the environment. This project aims to map out the decision-making process for property owners and consultants when working with renovation projects. The purpose of the study is to identify problematic areas that hinder efficient decision-making and sustainability efforts. With the problem areas mapped out, different solutions containing artificial intelligence will be explored and discussed. Ethical implications with the implementation of artificial intelligence will also be discussed in this study. In this qualitative study, a set of steps were taken to answer the research questions. Firstly, a literature review was conducted to explore existing research. Secondly, semi-structured interviews were held to gather empirical data. Lastly, the interviews were transcribed and analyzed with thematic analysis, to identify problematic areas in the renovation projects. The research strategy applied for this study is abductive. Due to the existing pandemic, the usage of software such as Zoom and Microsoft Teams have been used to conduct the interviews. The results show that the factors hindering the decision-making process were regulations & laws, economy & sustainability, lack of recycling, and lack of documentation. These were areas that both the consultants and property owners described as bottlenecks in the decision- making process. Artificial intelligence solutions were discussed for the problem areas regulations & laws and economy & sustainability because there is statistical data that could be used for training an artificial intelligence, unlike the other two problem areas that have to be dealt with manually due to the neglect of workers. The artificial intelligence solutions presented in this study can be considered ethical due to their assisting purpose. Although this research provides ideas for the implementation of artificial intelligence they are very brief and theoretical, further development and exploration are needed to implement the solutions. 

    Download full text (pdf)
    fulltext
  • 65.
    Ahmed Abdulalim, Qane
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Communication, Quality Management, and Information Systems (2023-).
    Omvänd logistik för e-handel inom modeindustrin2023Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This bachelor thesis explores the implementation of reverse logistics (OL) as a means to enhance sustainable practices within the e-commerce sector, with a specific focus on clothing e-commerce. The study begins by defining reverse logistics as the process of planning, implementing and controlling the efficient flow of raw materials, in-process inventory, finished goods, and related information from the point of origin to the point of consumption to meet customer requirements. To effectively utilise the reverse logistics companies utilize various strategies to encourage consumers to return their used or unwanted products in hope to reclaim the original value of the item(s). The successful implementation of reverse logistics necessitates a focus on transporting products from point B to point A. Given that most organisations rely on intermodal transport for deliveries, reverse logistics plays a pivotal role in maintaining an efficient supply chain. By conducting a literature review using databases such as Google Scholar, DIVA portal and Scopus this study used previous studies done in the same subject. Previous articles were studied to find the most common factors that hinder an efficient or improved reverse logistic process for clothing and accessories e-commerce companies. The factors that were found to be the most crucial were as following: 

    Inventory, Handling, Product complexity, Return policy, Transport and distance. Why these findings are of interest is because by implementing strategies that targets the factors it may lead to a more efficient reverse logistics process which in turn will lead to increased customer satisfaction and revenue.  

     

    Download full text (pdf)
    fulltext
  • 66.
    Ahmed, Zakarie
    et al.
    University of Skövde, School of Engineering Science.
    Nasani, Rami
    University of Skövde, School of Engineering Science.
    Modellering och emulering av en människa- robot samarbetande arbetscell2019Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Collaborative robots are a key challenge in industrial development. The problem today is that industrial robots are not adapted for close collaboration with humans and security gates are a need. This study focuses on developing an emulation model that can demonstrate such collaboration without the need for security gates. The project is based on the concept (virtual commissioning) which is about using emulation tools to develop a digital twin that is a copy of a physical system. With the help of the model, the system's functions and program code will be tested and validated before a real implementation is performed. On behalf of the University of Skövde, the thesis work was carried out to investigate the possibility of a close collaboration between a person and industrial robot in a virtual environment. In the study, two different methods have been developed to investigate the possibility of a collaboration but also to develop an emulation model. With this, operating lists have been created to clarify the person and the robot work tasks. Process scenarios were then created to demonstrate how such collaboration can take place in a virtual environment. A functioning emulation model in which man and robot collaborate, was delivered to the University of Skövde. By using the emulation model, the university can create and test different solutions before an implementation of a real system takes place. Finally, an emulation method is proposed that can be used to develop a digital twin.

    Download full text (pdf)
    fulltext
  • 67.
    Ahmedi, Figene
    et al.
    University of Prishtina, Serbia.
    Ahmedi, Lule
    University of Prishtina, Serbia.
    O'Flynn, Brendan
    Tyndall National Institute, Ireland;University College Cork, Ireland.
    Kurti, Arianit
    Linnaeus University, Faculty of Technology, Department of computer science and media technology (CM).
    Tahirsylaj, Sylë
    Hydrometeorological Institute of Kosova, Serbia.
    Bytyçi, Eliot
    University of Prishtina, Serbia.
    Sejdiu, Besmir
    University of Prishtina, Serbia.
    Salihu, Astrit
    University of Prishtina, Serbia.
    InWaterSense: An Intelligent Wireless Sensor Network for Monitoring Surface Water Quality to a River in Kosovo2018In: International Journal of Agricultural and Environmental Information Systems, ISSN 1947-3192, Vol. 9, no 1, p. 39-61Article in journal (Refereed)
    Abstract [en]

    A shift in water monitoring approach from traditional grab sampling to novel wireless sensors is gaining in popularity not only among researchers but also in the market. These latest technologies readily enable numerous advantageous monitoring arrangements like remote, continuous, real-time, and spatially-dense and broad in coverage measurements, and identification of long-term trends of parameters of interest. Thus, a WSN system is implemented in a river in Kosovo as part of the InWaterSense project to monitor its water quality parameters. It is one of the first state of the art technology demonstration systems of its kind in the domain of water monitoring in developing countries like Kosovo. Water quality datasets are transmitted at pre-programmed intervals from sensing stations deployed in the river to the server at university via the GPRS network. Data is then made available through a portal to different target groups (policy-makers, water experts, and citizens). Moreover, the InWaterSense system behaves intelligently like staying in line with water quality regulatory standards.

  • 68.
    Ahrenberg, Lars
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Alignment2014In: Routledge Encyclopedia of Translation Technology / [ed] Chan Sin-wai, London and New York: Routledge, 2014, p. 395-408Chapter in book (Refereed)
  • 69.
    Aicardi, Christine
    et al.
    King’s College London.
    Akintoye, Simisola
    De Montfort University.
    Fothergill, B. Tyr
    De Montfort University.
    Guerrero, Manuel
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Public Health and Caring Sciences, Centre for Research Ethics and Bioethics. Departament of Bioethics and Medical Humanities, University of Chile.
    Klinker, Gudrun
    Technical University Munich.
    Knight, William
    De Montfort University.
    Klüver, Lars
    The Danish Board of Technology.
    Morel, Yannick
    University of Maastricht.
    Morin, Fabrice O.
    Technical University Munich.
    Stahl, Bernd
    De Montfort University.
    Ulnicane, Inga
    De Montfort University.
    Ethical and Social Aspectos of Neurorobotics2020In: Science and Engineering Ethics, ISSN 1353-3452, E-ISSN 1471-5546Article in journal (Refereed)
    Abstract [en]

    The interdisciplinary field of neurorobotics looks to neuroscience to overcome limitations of modern robotics technology, to robotics to advance our understanding of the neural system's inner workings, and to information technology to develop tools that support those complementary endeavours. The development of these technologies is still at an early stage, which makes them an ideal candidate for proactive and anticipatory ethical reflection.

    Download full text (pdf)
    Ethical and Social Aspects of Neurorobotics
  • 70.
    Akama-kisseh, Jerome
    Blekinge Institute of Technology, Faculty of Computing, Department of Creative Technologies.
    EXPLORING COMPUTERIZED TROUBLE TICKETING SYSTEM AND ITS BENEFITS IN VODAFONE GHANA2016Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Today more than ever, Computerized Trouble Ticketing System is becoming a booming information technology system that makes the difference between staying in business in a competitive global telecommunication arena.

    This quantitative exploratory survey utilised conveniently selected research subjects to explore computerized trouble ticketing system and its inherent benefits in Vodafone Ghana Plc. Cross section of vital data set collected with the aid of structured questionnaires haven been analyzed using descriptive statistics model.

    The study revealed that, effective and efficient usage of computerized trouble ticketing systems benefit the company in terms of its customer satisfaction, competitive advantage and business intelligence in competitive telecom arena. Nevertheless, the smooth realization of these inherent benefits are constantly challenged by complexity in managing volumes of data generated, intense era of competition, high cost of trouble ticketing system, as well as, rapid technological obsolesce in computerized trouble ticketing applications in telecommunication market.

    The study recommended for the quick and effective adoption of differentiation strategy, cost leadership strategy and customer relationship management, which are customer-centric measures that can build sustainable long-term customer relationship that can create value for the company, as well as, for the customers.

    Download full text (pdf)
    fulltext
  • 71.
    Akpan, Dennis
    et al.
    Karlstad University.
    Jasim, Khalid
    Karlstad University.
    En väg till att minimera felaktigheter vid ansökan om bygglov: En jämförelse mellan olika kommuner avseende hur bygglovsprocessens första del kan förbättras genom bygglovshandläggare respektive sökande2022Independent thesis Basic level (university diploma), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    Applying for a building permit can be perceived as a complicated process for private individuals who are not familiar with building permit applications. Therefore, this study has the goal of reducing the proportion of incomplete applications through conducting some surveys to find innovative solutions that can be implemented. We also focus on the shortcomings in the first stage of the building permit process, as well as how they can be remedied by e.g., identifying problems and then improving each part. The study goes into detail on different communication approaches for each municipality. We also investigate whether the information provided by municipalities is easily accessible to applicants. In achieving the above stated goals, a quantitative research method where scientific articles, literature studies and questionnaires were used. In addition to this, qualitative research methods were included through team interviews, primarily with different building permit managers and building permit administrators for each municipality. The results consist of answered questionnaires that were distributed to both building permit applicants and building permit administrators in each municipality who have collaborated with them. The partners in the report have been Karlstad, Eskilstuna and Surahammar municipality. The responses have been formulated in a way to be able to present data in various figures such as diagrams and tables, which in turn give a clear picture of most of the ambiguities that arise in the application. Based on the results of the work, it has turned out that it was most problematic for building permit applicants regarding the control plan. It was perceived as the most difficult document to get hold of and send complete. A measure for this is to give applicants the opportunity to receive a similar complete building permit application that they can download from the municipal website, which can be used as a comparison. A change in the law or clarification from the National Board of Housing, Building and Planning's website is also a solution as all three municipalities have obtained exact information and needed to make additions with information, descriptions, and copies. Clarification of sample drawings and the website is also a solution to make it easier for applicants by making the content easier to understand. A text on the website stating that the waiting time will be shorter with a correct building permit application was also a solution and to improve communication between administrators and applicants so that it becomes more accessible to be reached via e-mail, telephone, and even physical meetings with questions. Another solution that emerged from the result was that a column with the administrator's contact information to get direct contact and thus improve the communication between the applicant and the administrator regarding ambiguities and questions.

    Download full text (pdf)
    Bygglov
  • 72.
    Aksoy, Hasan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Communication, Quality Management, and Information Systems (2023-).
    Riskhanteringsstrategier för råmaterial inköp: Fallstudie vid Kubal2024Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Kubikenborg Aluminium AB, Kubal is Sweden's only producer of aluminum and faces different risks in their procurement process including price volatility and supply interruptions for their essential raw materials which are used in their production. Factors like policy changes and Covid-19 add great risks to negatively impact these risks. The study was conducted using different data collection- and analysis methods to identify and develop possible risk management strategies for Kubal, specifically for price volatility of raw materials. Historical purchase data was analyzed to identify patterns and trends in price changes. The study also explores sustainability strategies to create long-term sustainability and also strengthen the company brand. The study provides a deep and broad understanding of risk management in raw material procurement. It provides theoretical and practical examples by studying Kubal, the results of which can also be used for other companies in similar situations. The study's conclusion shows that Kubals current strategies are effective against supply disturbance and quality risks but not effective for dealing with price volatility. By Kubal implementing procurement strategies and contract strategies, they would have saved costs in situations like during the pandemic. There are many different factors that affect price volatility but political events, market situations and in this study the pandemic affected the price the most. The study provides the possibility for further research by studying other materials in other industries and companies.

    Download full text (pdf)
    fulltext
  • 73.
    AKTAR, SHAMIMA
    Blekinge Institute of Technology, Faculty of Engineering, Department of Spatial Planning.
    Urban Public Space: A Case from Developing Country2017Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Cities in developing world are inadequately equipped with public spaces. The increasing urbanizations trend is attracting more people to come to the cities without having proper sustainable plan for public spaces. However, this social public place holds the important function for urban well-being and collective recognition. This is the place where human can participate as fully fledged social subjects in complex civic life. Unfortunately, in most cases the provision of public space in these cities is always neglected or poorly integrated in planning legislations. So, in many cases community people make their own ways of social interaction that gives public space a new definition. Khulna, one of the divisional cities of Bangladesh, is going through the similar developing country situation. Lack of fund and space restricts development agencies to make new public spaces in this city. On the other hand management and coordination challenges between multilevel planning authorities also making existing public spaces malfunctioned. Sustainably planned, created and managed public spaces are hence urged for the cities of developing world to get livable and healthy urban environment.

    Download full text (pdf)
    BTH2017Aktar
  • 74.
    Al Dawood, Hayder Mahdi A
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Civil and Industrial Engineering, Industrial Engineering and Management.
    Bridging the gap between AI systems and society: algorithmic accountability and ethics within small AI organisations in Sweden: Is Sweden ready for AI Ethics?2021Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    During the last years, ethics has gained greater attention in the field of Artificial Intelligence (AI). Stakeholders engage in debates on how to apply ethical principles in various AI organisations with many differing viewpoints. The importance of ethics in AI continuously increases as this area grows rapidly, with a considerable amount of small organisations appearing every day. At the same time, AI solutions enter all the spheres of human activities. Algorithmic accountability can be seen as one of the ways to achieve AI ethics. This thesis will, therefore, explore how small AI organisations can ensure algorithmic accountability. The thesis is based on qualitative data collected from semi-structured interviews in four Swedish small AI organisations. Findings reveal that small AI organisations in Sweden do not apply or consider applying ethical principles when developing their products. The reasons for such decisions are mainly a lack of policies and regulations. The lack of legislation makes ethics of less priority. This thesis proposes governmental bodies facilitate the AI industry by establishing clear policies, standards, and certifications. Such initiatives can assist AI organisations, especially small ones, to address ethical implications and push them towards a high level of AI. 

    Keywords: Artificial Intelligence, Algorithmic accountability, Small organisations, AI governance 

    Download full text (pdf)
    Bridging the gap between AI systems and society
  • 75.
    Al Dawood, Hayder Mahdi A
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Civil and Industrial Engineering, Industrial Engineering and Management.
    Seeking legitimacy through specialization and diversification: How do film festivals select films2022Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Download full text (pdf)
    Seeking legitimacy through specialization and diversification
  • 76.
    Al Farra, Hussni
    Linköping University, Department of Management and Engineering, Logistics & Quality Management.
    Acceptance Tests – FAT & SAT: An Empirical Case Study of Utility Poles2016Independent thesis Advanced level (degree of Master (Two Years)), 80 credits / 120 HE creditsStudent thesis
    Abstract [en]

    The overall purpose of this project is to devise improved quality acceptance procedures to examine quality characteristics of utility poles at the factory of the supplier (FAT) and on-site upon receipt by the customer (SAT). To that end, the thesis draws upon available standards, literature, and industry practices regarding wood, fiberglass and steel poles. As far as the design of the research, a single case study of a major power company was chosen. Then, a data collection plan was developed in order to build upon the existing knowledge found in the literature, and upon the data that can be collected from three of the Company’s suppliers, in addition to the Technical Research Institute of Sweden (SP). Documents’ analysis, interviews, observations, and a survey were the tools of that plan. It was found that criteria, inspection and test methods of wood poles are all sufficiently covered in the standards and the literature; for wood is the most commonly used material for utility poles. Next, in coverage of research, are the steel poles; while there is currently no standard that covers fiberglass utility poles. Indeed, quality characteristics, criteria, and acceptance procedures can altogether form parts of a sustainable solution, as long as the quality is managed as a process whether at the Company’s end or at the fabrication sites; that is especially true if there is some form of backward partnership between the Company and its suppliers.

    Download full text (pdf)
    fulltext
  • 77.
    Al Halabi, Rami
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Application of game theory in Swedish raw material market: Investigating the pulpwood market2020Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The research aims to analyze the market structure of two companies in th forest industry (Holmen and SCA) with the assumption that thes companies compete at buying raw materials and selling products. Theproduct market in this study is the paper market under the assumption thatboth companies operate in a concentrated product market. The rawmatial market that one investigates in this study is the pulpwood marketunder the assumption that it is a duopsony. What this study has concludedis that Holmen and SCA buy pulpwood from lots of different self-managingforest owners. Each company creates a monthly pricelist where they decidethe bid price of pulpwood. The amount varies depending on the region. Bot SCA and Holmen chooses between two strategic decisions, either to bid highor to bid low. Through game theory, it has been clear that each company usesmixed strategies as they sometimes give high bids and sometimes give lowbids. The Nash equilibrium for mixed strategies have been calculatedmathematically and analyzed through the dynamics of game theory. As fore market concentration, the product market has been investigatedthrough the Herfindahl-Hirschman index (HHI). Porter's five-force modelwas used to analyze the industry competition. The results showed that theproduct market is concentrated as the HHI tests gave High index scoresbetween 3100 and 1700. In addition, there existed a Nash equilibrium in amixed strategy that gave SCA expected payoff 1651 million SEK and Holmen1295 million SEK. The dynamic game theory showed that SCA and Holmen'sbidding follows a repeating trajectory and that the high/low bidding is dueto deviations from Nash equilibrium probability distribution. The Nashequilibrium situation prevails if the probability distribution at low biddingis 68.6 percent for SCA and 66,7 percent for Holmen. This providedindicators for a non-cooperative game. The conclusion is that if two players

    Download full text (pdf)
    fulltext
  • 78.
    Al Kamsie, Samer
    et al.
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Klevsäter, Lars-Peter
    Titanic: Ur ett modernt försäkringsperspektiv2019Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Maritime insurance is a collective name for a multiple insurances a shipping company must have in order to conduct maritime operations. The two most common ones that affect the ship itself and its operation are Kasko and P&I. Using the RMS TITANIC case, the study intends to determine whether the policyholder of the vessel is entitled to insurance compensation or not according to modern Swedish maritime insurance. The study looks more closely at how insurance companies apply the terms for identification and what differentiates negligence from gross negligence, in order to determine whether compensation should be paid to the owner of RMS TITANIC. The study uses a qualitative method with semi-structured interviews and literature study. The result shows that Swedish insurance companies apply identification to a small extent, which allows insurance coverage for shipowners not to be affected if a crew acts carelessly on board, but the same does not apply if the act was grossly negligent. This means that the policyholder of RMS TITANIC is entitled to compensation according to modern maritime insurance.

    Download full text (pdf)
    fulltext
  • 79.
    Alasaad, Roaa
    et al.
    Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation.
    Chahine, Hanna
    Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation.
    Proaktiva Produktnedläggningsbeslut: En Forskningsstudie om Utmaningar, Möjligheter och Effektiva Åtgärder inom Industriella Företagskontexter2024Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

     Produktnedläggningsbeslut kan gynna företag på flera områden, inklusive organisatoriska, ekonomiska och strategiska aspekter. Trots dessa fördelar uppstår utmaningar såsom bedömning av finansiell prestation, påverkan på intressenter och behovet av effektiv resursallokering. Detta gör beslutet mer komplext och krävande, vilket ofta möter motstånd från chefer. Trots ämnets vikt finns det en brist på forskning inom området. Av den anledningen undersöks vilka utmaningar, åtgärder och möjligheter som är förknippade med beslutet att lägga ned en produkt i denna studie. För denna studie användes en mixed-method approach, vilket innebar att både kvantitativa och kvalitativa metoder användes för att samla in empiriska data. Både en enkätundersökning och intervjuer med produktchefer inom industriföretag genomfördes för att möjliggöra en holistisk och omfattande undersökning av det studerade ämnesområdet. Den empiriska datan jämfördes sedan med den teori som sammanställts.  PNB kan medföra olika utmaningar relaterade till kunder, externa partners, strategi, ekonomi och organisation. För att hantera dessa utmaningar finns olika åtgärder som chefer inom industriella företag bör vidta, men den viktigaste av dessa är tydlig kommunikation. Det finns också möjligheter som detta beslut kan medföra. Genom att förstå dessa möjligheter kan företag skapa strategier för att maximera de positiva effekterna av PNB och stärka sin position på marknaden. 

    Download full text (pdf)
    Proaktiva Produktnedläggningsbeslut
  • 80.
    Alawi, Hussein
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Guyo, Hassan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    En värdeflödesanalys av ett reservdelslager i en fluktuerande marknad.: En fallstudie med avseende att implementera Lean.2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Företag inom stålindustrin tacklas nuförtiden med en fluktuerande och oförutsägbar marknad. Detta resulterar i försiktiga åtgärder och svårigheter med att planera och uppnå långsiktiga mål. Ovissheten leder till att beslut ibland baseras på felaktiga prognoser. I höjden av denna fluktuerande marknad behövs vanligtvis förstärkning i och med att efterfrågan ökar. Detta leder till att företag ställs inför svåra beslut, att anställa ytterligare personal och/eller utöka lagerhållning. Denna marknad kan så småningom vända och detta leder till varsel av personal samt kontraktion av depåer för att hålla en viss vinstnivå, som det tidigare har hänt. Ett av alternativen som återstår i dagsläget är effektivisering av orderhanteringsprocessen för att reducera ledtider och klara av ökande efterfrågan. Lean är en välkänd metod för att effektivera flöden i processer. Företagets reservdelslager arbetar inte med Lean i dagsläget. Syftet med denna fallstudie är att undersöka med värdeflödesanalys(VSM) och diskret händelse simulation vilka kritiska punkter och flaskhalsar som existerar i reservdelslagret och målet är att sedan eliminera de med Lean som arbetssätt. Första steget bestod av att kartlägga orderhanteringsprocessen med en processpromenad och sedan analysera de olika aktiviteterna. Detta möjliggjorde en identifiering av flaskhalsar och kritiska punkter. Resultatet presenterar ett nuläge av företaget med en cykeltid på 224 sekunder/artikel och en ledtid på 1549 sekunder/order. En order har även ett genomsnitt på 6 artiklar varav fem ligger på hyllor och en på lagerautomat. Flödet har illustrerats i ett spagettidiagram. I koppling med teorin har ett par förbättringsförslag föreslagits som exempelvis en omstrukturering av artiklar på hyllor utifrån pareto(ABC)-analys. Detta ska reducera ledtiden. Flaskhalsarna som har identifierats är osynkroniserade arbetsrutiner och ineffektiva lagerstrukturer. Därmed har ett antal effektivare framtida lägen med reducerade ledtider föreslagits. Slutsatsen är att Lean principer som ”Jidoka”(ständiga förbättringar) och Just in time(lägre ledtider i princip) kan implementeras med olika lösningar som VMI, IT och automatisering. Fortsatta studier kan utvärdera varje lösning med DES och även jämföra olika kostnader i förhållande till nytta.

  • 81.
    Al-Barghouthi, Mohammad
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Civil and Industrial Engineering, Industrial Engineering and Management.
    Towards Understanding Knowledge Interchange In Cross-Functional Teams: A case study on organizational learning2022Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Today, many organizations are facing an increased necessity to employ cross-functional teams. Its growing popularity is rooted in its positive impacts on innovation. Additionally, these teams are an excellent way of managing complex organizational tasks without the need for a significant modification of the existing organizational structure. Despite the benefits of the cross-functional team, the diversity in the profession and the specialized knowledge possessed by the team members lead to different thought worlds and perceptions, causing communication barriers. This is problematic because communication is needed to share, transfer, and create knowledge, which are the prerequisites of both individual and organizational learning. There is various literature on knowledge management and learning; however, our understanding of how knowledge interchanges in cross-functional teams remain limited. Therefore, this thesis conducts semi-structured interviews at five successful companies to examine the policies and procedures established by management to facilitate the interchange of knowledge in the organization. Also, it investigates the activities used by coordinators to maximize learning and create a sense of belonging in the cross-functional team.

    The findings of this study revealed several activities that could increase both the knowledge interchange and the team’s learning. First, it is preferred to have decent knowledge accessibility, where the bar to contact anyone is low. Second, it seems that knowledge receptivity has to be increased, which can be done by giving knowledge a meaning, using pictures, analogies, metaphors, Etc. Third, a frame of reference could be needed, where people can get into each other’s shoes through, for example, job rotations and learn each other’s jobspecific terminologies. Fourth, competition is preferred to be eliminated, which can be achieved by establishing a common team goal, removing internal bonuses, and eliminating ranking systems. Finally, it seemed essential to have cohesion in the group, which can be accomplished by having, for instance, afterworks, group travel activities, and collective organizational culture

    Download full text (pdf)
    fulltext
  • 82.
    Albeteihi, Wissam
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Karlstad Business School (from 2013). Karlstads universitet.
    SLA-kontrakt för ökad molnsäkerhet: Intervjupersoners uppfattningar om säkerhetsmått och säkerhetsramverk som förtydligar SLA-kontrakt för molnbaserade tjnster2022Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
    Abstract [sv]

    Mindre företag och organisationer har uttryckt ovilja att använda molntjänster på grund av

    otydliga säkerhetsvillkor. Skälet är att de Service Level Agreements (SLA) som reglerar

    ansvaret för säkerheten i Molnet, bland annat vad gäller datalagring och skydd av

    personuppgifter, upplevs vara otydliga. Syftet med denna studie var därför att undersöka vad

    användare av molntjänster anser om de säkerhetsramverk och säkerhetsmått som används i

    SLA-kontrakt för molntjänster. Genom semistrukturerade intervjuer av fyra personer och

    analys av intervjuerna visade resultatet att användarna ansåg att de säkerhetsramverk som

    användes i SLA-kontrakt för molnbaserade tjänster var för otydliga genom att vara alltför

    generella och inte tillräckligt relevanta för den egna verksamheten. Användarna ansåg att de

    säkerhetsmått som tillämpades i SLA-kontrakten skulle kunna vara tydligare genom att vara

    mer detaljerade och relevanta för den egna verksamheten. Slutsatsen blev därför att etablerade

    säkerhetsramverk som NIST, ISO och COBIT inte tillmötesgick användarnas behov av

    specifika och relevanta säkerhetsramverk och säkerhetsmått i SLA. En lösning skulle därför

    vara att använda mjukvara för att automatiskt generera SLA-kontrakt utifrån tydligare samt

    mer specifika och relevanta säkerhetsmått. En sådan lösning skulle öka användarnas upplevelse

    av säkerhet genom SLA och öka deras användning av molntjänster. 

    Download full text (pdf)
    fulltext
  • 83.
    Albini, Gabriele Luigi Aldo
    KTH, School of Industrial Engineering and Management (ITM), Industrial Economics and Management (Dept.).
    "An Analysis of the European Telecommunications Strategic Environment: How Can Strategic Actions Be Defined to Adapt to the New Scenario? A Telefónica Case Study"2013Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This research presents an analysis of the European Telecommunication strategic environment with particular focus on the three macro-changes which have been influencing the recent history of such industry. These are, first of all, the shift from a government-controlled market to a privatized market. Second, the introduction of price limitations - called Eurotariff - which are supposed to regulate the mobile traffic throughout Europe. Finally, the constant growth of data and internet traffic demand, compared to the voice traffic demand, mainly due to the success of OTTs (Over-the-Tops) and the introduction of NGN (Next-Generation Network) applications and software. Such changes have increased the competition in an industry which was organized in monopolies and are forcing the companies to change, following the different customers' needs. Throughout the essay, a case study about Telefónica has been developed: after a presentation of the company and of Telefónica's deregulation process, the consequences of the environment analysis will be defined and, finally, some strategic actions will be proposed in order to adapt to the new strategic environment. The methodology which has been followed consists in a research on the models existing in literature designed to analyze the strategic environment. The best ones have been used and applied to the real case, involving Telefónica: the findings obtained have then been considered the basis to define the strategic actions. The purpose of the paper is twofold: first of all to offer an understanding of the telecommunications business with a particular focus on the Eurotariff, OTTs and NGN phenomena; second to show how a strategic environment can be effectively studied, focusing on the changes that characterize the industry, and how the consequences can be deduced. The information coming from this type of studies is very important for a company to understand what to change in order to adapt to a new context and achieve better performances.

    Download full text (pdf)
    Master Thesis - Gabriele Albini KTH
  • 84.
    Albiz, Niccolas
    KTH, School of Industrial Engineering and Management (ITM), Industrial Economics and Management (Dept.), Sustainability and Industrial Dynamics.
    Sustainability Education at Industrial Engineering Programs in Sweden: A study of the relevant and received sustainability education, and the associated challenges, at 5-year industrial engineering programs2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The public concern for sustainability issues is ever increasing whilst the trust in corporations is decreasing. CEOs now see sustainability concern and compliance as an important component in retaining their competitive advantage and regaining the trust of their surrounding community. For these reasons it is important to find new manners of uniting societal improvement with business, requiring new forms of competencies. This study has investigated what sustainability education is actually central to the industrial engineering profile, as well as what of this is then covered in the programs.

    The study involved two phases. The first involved interviewing experts as to what was central for these engineers to learn, resulting in a content list. The second phase involved mapping the instances of this content in the five largest industrial engineering programs (covering circa 74% of these students) as well as the associated challenges to broaching this content. The first phase was primarily qualitative whilst the second phase was largely quantitative, though each data point consisted of a qualitative interview.

    Five key insights can be drawn from the study regardless of normative stand-point. 1) The sustainability topics that were deemed relevant cover a vast area of disciplines and aspects. 2) There is a skewedness in the content covered, favouring the environmental aspects. 3) There is a lack of integrative instances where the knowledge from different sources and perspectives is synthesized. 4) The key challenges revolve around concept definition and communication. 5) The normativity, interconnectedness and pedagogics contribute with uncertainty and complexity in the assessment of sustainability education.

    The study is finalized with a synthesis of the various insights to arrive at the conclusion that having sustainable business practice as the aim of the programs, establishing common content goals and employing active learning approach would circumvent many of the perceived challenges as well as align the programs with the need of the industry.

    This study contributes with deeper understanding of the sustainability education required and provided to industrial engineering students in Sweden. As such the study has practical applications for the programs studied. The theoretical implications of this study lie in the empirical data achieved regarding the topics of relevance to these engineers, showing high levels of agreement with current literature, as well as the perceived challenges to broaching this content in the current curricula. Furthermore it provides empirical data as to the sustainability education received at different programs.

    Download full text (pdf)
    fulltext
  • 85.
    Albu-jaafer, Ali
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information and Communication systems.
    Undersökning om kringtjänster i en kombiterminal2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The transport that uses multiple modes of transportation called Intermodal transport. Due of the advantages of intermodal transport offers, the market for intermodal transport has become increasingly important. The benefits can be both environmentally and economically. This terminal is the destination where intermodal transport takes place. The purpose of a terminal is to combine two different modes of transport. This can lower the total cost of transportation and reduce environmental pollution. To get a successful intermodal terminals there are a few factors that should be considered. One of these factors is the primary services and incidental services terminus offer.

     

    The purpose of this study is to examine the ancillary services that can be applied to an intermodal terminal in order to increase revenues and attractiveness of the facility. To answer the research questions I interviewed four different operators in intermodal terminals in Sweden. In addition there are also two interviews were carried out with the existing operator in Sundsvall intermodal terminal and the operator of the new intermodal terminal. The purpose of these two interviews was to see what the operators have the opportunity or plan and how it works in Sundsvall existing intermodal terminal in the present day. Literature studies that I used in this study have been covered by previous surveys, reports and books. The purpose of literary studies was to identify intermodal terminals and the new services that can be used on the terminal.

     

    The results of this study gave a very good picture of these ancillary services that can be applied in Sundsvall new intermodal terminal to increase the terminal's revenues and attractiveness. Examples of these services, repair factories of trailers and containers, refueling station in connection with the intermodal terminal, cross-docking, by scrolling with the electric locomotives. Besides these services, there are other factors that should be taken into consideration in order to increase revenues and attractiveness of intermodal terminal. These are the technologies that are used in intermodal terminal, IT support, security and location of the intermodal terminal.

  • 86.
    Alcaraz Bosca, Neus
    KTH, School of Industrial Engineering and Management (ITM), Industrial Economics and Management (Dept.), Industrial Economics and Management (Div.).
    Lean project management. Assessment of project risk management processes2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Traditional methods of project management are not appropriate for complex projects anymore. Since projects are becoming increasingly complex and uncertain, interaction between activities and resources is growing in ways not considered by these methods. Nowadays, managers need more agile project management methods that are able to recognize and deal with uncertainty and to produce the expected results. Lean project management, the most recent approach of lean methodology, appears as an alternative approach capable of dealing with complexity and uncertainty. The latest investigations in the field show that traditional methods are still adequate for simple projects, while lean methods are more appropriate for complex projects.

    This thesis aims to investigate the nature of lean project management and to examine project risk management processes so that managers can assess the complexity of projects before their beginning and decide which method to apply in order to manage them. 

    Download full text (pdf)
    fulltext
  • 87.
    Aldenlöv, Jens
    et al.
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences, Business Administration and Industrial Engineering.
    Bergquist, Bjarne
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences, Business Administration and Industrial Engineering.
    Eriksson, Per-Erik
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences, Innovation and Design.
    Söderholm, Peter
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences, Business Administration and Industrial Engineering.
    Karrbom Gustavsson, Tina
    KTH Royal Institute of Technology, Real Estate and Construction Management .
    Public procurement of railway infrastructuremaintenance: a literature review2017Conference paper (Refereed)
    Abstract [en]

    The maintenance of railway infrastructure has in several instances been changed from government-based to being based on public procurement, with varying degrees of flexibility for the contractor to design their maintenance work. The purpose of-giving contractors a larger freedom of choice of how to perform maintenance is to stimulate them to innovate and develop their maintenance processes. Since the contracts differ in between and there are changes in government policies over time that affects both existing and new contracts, a comparison between different contracts becomes challenging. A literature review has been conducted to understand the change in procurement strategy and how to encourage contractors to innovate. The research questions include: What procurement strategies are there? How is maintenance evaluated? How does procurement affect the innovation opportunities for entrepreneurs?

    The literature review focuses on railway maintenance and contract design between client and contractor. In total, 17 articles matched the search criteria and were selected for the review. To have successful maintenance service, five articles suggested partnering as a strategy with common goals in combination with good communication during the entirety of the contract. When selecting incentive plan, four articles mentions that a focus on performance-based incentives in combination with riskmanagement is better rather than actual payment schemes. The reason being that payment is often themain cause of conflicts between client and contractor. The scientific literature suggests that improvement in incentives improves quality of maintenance, decreases delays and technical failures. The conclusion from the literature review is that partnering in railway maintenance is considered successful. With accurate knowledge about railway assets the incentive plan becomes accurate which reduces costs.

    The literature review is a part of a research project with an overall goal to develop a model to guide the selection of appropriate type of procurement strategy, contract and control of maintenance for a moresustainable railway system.

    Download full text (pdf)
    fulltext
  • 88.
    Alderfalk, Oliver
    et al.
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Fjällskog, Ekkarach
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Studenternas syn på praktikens kvalitet: En kvalitativ studie om hur fartygstyperna påverkar kvaliteten på den fartygsförlagda utbildningen2024Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This study aims to investigate how the students on the Master Mariner Programme perceive the quality of the ship-based training based on the type of vessel and how it differs between different types of ships. Utilizing a qualitative method in the form of semi-structured interviews, a total of six interviews were conducted with students at the Kalmar Maritime Academy. The results show that students are generally satisfied with the quality of the ship-based training. Tankers are described as the vessel type with the highest quality of ship-based training, where students have more opportunities to take personal responsibility and develop their skills as future officers. However, some aspects are highlighted as areas where students would like more time and room to improve on, such as mooring operations and voyage planning. Respondents identify several factors that influence the quality of the ship-based training, including the mentoring, crew engagement and what tasks are assigned to the cadets.

    Download full text (pdf)
    fulltext
  • 89.
    Alderhell, William
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Civil and Industrial Engineering, Industrial Engineering and Management.
    Hamad, Gulnaz
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Civil and Industrial Engineering, Industrial Engineering and Management. Uppsala University.
    The Challenge Of Incubating Sustainability In The Swedish Innovation System: An Exploratory Study Of Business Incubators And Entrepreneurs Tackling Sustainability Issues2021Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In recent years there has been an increased focus on preservation of our environment and natural resources. As a result, in a notably natural resource consuming world, sustainable development has evolved in societies for the conservation of the environment. Even though the term sustainability has become more frequently discussed, the subject remains complex. The aim of the study is to explore how high-profile business incubators in Sweden and the startups they support relate to sustainability, and to understand the conditions for pushing more progressive sustainability agendas, in a country that boasts about its sustainability ambitions. Fourteen in-depth, semi-structured interviews were held with both incubator business developers, startup founders, an expert within the innovation system and a professional investor. This qualitative study analyses different perceptions regarding sustainability and the incubators and startups role within the innovation system in a country that boasts about its sustainability ambitions. The results indicate that there is a demand for stricter institutional pressures, with increased support for entrepreneurs. It also turns out that incubators have room for improvement when it comes to motivational inspiration and behavioural changes for their tenants. However, they show to be receptive and attentive towards a systematic approach in order to enhance sustainability work. It is also shown that entrepreneurs', compared to the incubators, appears to have taken a greater distance from understanding the sustainability topic. As many as 56 percent of the entrepreneurs claimed that a forced method could be beneficial but might require more time than it is worth. The remaining 44 percent saw it as purely advantageous. Future studies are encouraged to conduct an investigation including a greater number of participants as an attempt to generalise these findings, and also try to identify if gender has a significant role regarding the matter.

    Download full text (pdf)
    fulltext
  • 90.
    Alderhell, William
    et al.
    Halmstad University, School of Business, Engineering and Science. Halmstad university.
    Norstedt, David
    Halmstad University, School of Business, Engineering and Science. Halmstad university.
    Water & Cultivate2019Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Download full text (pdf)
    fulltext
  • 91.
    Aldén, Gustaf
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    A pilot framework for BRM training2020Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Human error has been a key factor in grounding- and collision incidents in the past and continues to present a challenge to the maritime industry in the present day. The feasibility of a pilot framework for Bridge Resource Management (BRM) training lies at the heart of this study, its objective being to gauge the possibility of the construction of such a model. The result is thought to open up for further research and highlight the most relevant and effective BRM tools that can be used, by the bridge team, to prevent collision and grounding. The study was carried out in two stages. Firstly, four key personnel within the shipping industry were interviewed. These respondents were tasked with prioritising what they regarded as the most effective BRM tools. Secondly, the effectiveness of these tools was tested on marine incident cases. A document analysis was carried out on six collision and grounding cases, as investigated by the Marine Accident Investigation Branch (MAIB). The majority of the respondents were in agreement regarding which three BRM tools they regarded as the most relevant and effective. The result from the interviews was repeated in the result from the document analysis.  The conclusions that were drawn are that: it is possible to construct a pilot framework for BRM training and it is also possible to measure the effectiveness of the BRM tools. Additionally, suggestions for further research that arose from this thesis pertain to the study of the relationship between different BRM tools.

    Download full text (pdf)
    fulltext
  • 92.
    Alenvret, Caroline
    et al.
    Linköping University, Department of Management and Engineering, Project Innovations and Entrepreneurship. Linköping University, Faculty of Science & Engineering.
    Evaldsson, Johannes
    Linköping University, Department of Management and Engineering, Project Innovations and Entrepreneurship. Linköping University, Faculty of Science & Engineering.
    Creating customer value through knowledge integration: How internal stakeholders can be involved in the product development process2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The increasing globalisation of the market is followed by increased competition between organisations. Therefore it becomes more important to create products with high customer value. To be able to create customer value, deep understanding of the customers’ needs must be obtained by employees, shared between them and transformed into products. Further consequences of globalisation are increasing differences between customers’ needs, which results in demand for customisable and flexible products.The purpose of this study was to analyse how organisations can create more customer value through increased knowledge integration. The focus was on how knowledge that already resides within a globally dispersed organisation can be integrated during the product development process.This study showed that customer value is created throughout the product development process by integrating the knowledge held by R&D and internal stakeholders. Different types of value are created at different phases in the product development process. One important finding is that different parts of the augmented value are created throughout the entire product development process. Since employees obtain different knowledge depending on which customer they interact with, it is important to utilise knowledge from a large number of employees with different roles and in different countries. Hence, the significance of knowledge integration must be disseminated and understood across the organisation. After completing the product development process additional customer value is created by the internal stakeholders’ who sell and implement the product, but it is during the product development process that the basis for their value creation is established.Knowledge needs to be integrated in a formalised, repeatable way, so that the R&D department can ensure that the right product is developed at the right time. Integration means that the tacit knowledge that resides within one employee is codified into an explicit form that can be exploited by more employees. Therefore, four steps must be performed and repeated iteratively to create and spread knowledge throughout the organisation. The first step includes communication by exchanging tacit knowledge. The second step entails documenting the knowledge, and the third step involves combining the knowledge residing in the organisations into one common knowledge system. The final step includes distributing the knowledge so that it recievess wide attention within the organisation. Several factors that have a negative impact on these four steps, and knowledge integration, need to be countered somehow. However, it was found that there are several mechanisms that facilitate knowledge integration, and most often the presence of several mechanisms at the same time had a better effect.

    Download full text (pdf)
    Creating customer value through knowledge integration
  • 93.
    Alexandersson, Christer
    et al.
    Mälardalen University, School of Innovation, Design and Engineering.
    Kumlin, Anthony
    Mälardalen University, School of Innovation, Design and Engineering.
    Brainstorming VS Nominal group technique online: En jämförelse mellan idégenereringsmetoderna brainstorming och nominal group technique i en online miljö2020Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The aim of this study can be separated into two purposes. The first purpose is to explore if the idea generation methods known as brainstorming and nominal group technique would give similar results depending on if the idea generating process was conducted in a physical space, compared to an online space. The second purpose of this study was to test both of the idea generating methods with a less lab focused situation, by asking a question that focuses on a real problem that the Company Coompanion, our partner in this study wanted answered. These purposes were tried in a workshop held with our partner Coompanion. Given the prevailing world situation in the spring of 2020, the experiment had to take on the form of a quasi-experiment where no control group could be created. The reason for this was the global pandemic and the government recommendation of not gathering in groups if it is avoidable, which led this study to compare with results obtained by a physical experiment made by Miller (2009). The results of the study indicates that the difference in the amount of generated ideas that normally exists between brainstorming and nominal group technique still exists. Although in contrast, the study shows that the total number of ideas from the online groups generated just a little more than half of the ideas compared to Millers (2009) physical groups. This indicates that idea generating online still doesn't measure up to a physical idea generating process. It was also shown that the ideas generated by the online nominal group technique group were more creative then the brainstorming group when it came to the question that Coompanion asked.

    Download full text (pdf)
    fulltext
  • 94.
    Alexandersson, Martin
    Linköping University, Department of Management and Engineering, Carl Malmsten - furniture studies. Möbelsnickeri.
    Parkettläggning: med massivträ som utgångspunkt2015Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    This thesis is about furniture parquetry and various techniques. Parquetry can be describe as wooden, 2-dimensional patterns used to garnish furniture and other products. It is manufactured in thin veneer layer and applied to the surface. By using thin veneer we are able to minimize stresses in the material, which results in tight joints. In Europe, furniture parquetry is traditionally created by wood veneer pieces that has been formed and joined into a pattern. There are also other proven techniques developed during different stages in history and in different places in the world.

    In my thesis I describe some of those established techniques and some of my experiments in the subject. The report is based on literature studies, observations of movie clips, interviews and empirical practical studies. I have compared different techniques to see in what ways it is possible to rationalize the production of furniture parquetry. At the same time I wanted to try and develop a method that makes it possible to create parquetry patterns containing round shapes. In this way I hope to contribute to the development and modernization in the area. 

    Download full text (pdf)
    Parkettläggning - Martin Alexandersson
  • 95. Alfateh, Muhammad
    et al.
    Khan, Yasir Ali
    The effects of client’s requirements on construction innovation: A case study of the new Ångström Laboratory construction project2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    It has often been noted that the construction sector is quite inefficient in producing innovation especially when compared with other industries (Winch,2003). Moreover, innovation is becoming more and more a key competence in competitive environment of construction. Clients were found to play a pivotal role of clients in promoting construction innovation. However, how clients contribute to innovation is less investigated. Also, the construction project consists of a network of actors who interact with each other on different levels.These interactions affect and shape the requirements of the clients which then influence the innovation process of the construction project. It is important to take into account the several aspects of these interactions into consideration (Havenvid et al., 2016).The aim of this study is to investigate the role of clients in driving construction innovation by studying how their requirements may generate change within the project network. The second question aims to capture the different project actors’ views and perspective on construction innovation. This is done by conducting a case study on the construction project of the New Ångström Laboratory; an academic building of Uppsala University in Sweden. The data were collected following a qualitative approach. The results were analysed using ARA model (Actors, Activities and resources) framework.The study concludes that partnering can lead to an increase in productivity and efficiency of carrying out construction project work. The study also found that clients requirements can trigger innovation in a construction project. Another finding is that process innovation may generate greater effects on the actor's network than product innovations and suggest focusing on process innovation to accelerate the overall innovation process.

    Download full text (pdf)
    fulltext
  • 96. Alfredsson, Axel
    et al.
    Berefelt, Erik
    Hur kan ett utökat BIM-användande uppnås i infrastruktursektorn?: En fallstudie av NCC:s lokala projektorganisation i Uppsala2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The purpose of this thesis is to examine how BIM can be used in a more widespread way at a contractor's project organization within infrastructure. This includes an analysis of the factors that are important to take into account and what barriers an organization must overcome. The thesis has also compared infrastructure- and real-estate projects in terms of BIM-usage.

    A case study has been carried out at the construction company NCC in Sweden with a qualitative approach. The study builds on a theoretical framework and empirical data that have been gathered through a literature review and interviews.

    The results show that there is a need for at least one person responsible, and with mandate to drive change at a local level in the organization. The planning and production phase need a consensus on how to work with BIM and how the technology should be used within a project organization. There is also a need for a requirement and monitoring process towards planners and consultants before the planning process starts.

    Moreover, the study concludes that BIM usage in infrastructure projects differ from that of real estate project. It therefore suggests that the two should not be directly compared in terms of the potential of the technology.

    Keywords: BIM, Building information modelling, Infrastructure, Case study, Innovation, Project-based organizations

    Download full text (pdf)
    fulltext
  • 97.
    Alghazi, Ziad
    Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
    Wireless instrumentation2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Syftet med detta examensarbete var att undersöka om det finns möjlighet att implementera en trådlöst instrumenterings kit från Emerson Rosemount Process AB på dagens styrsystem som finns på Siemens gasturbiner. En prototyp skapades som bygger på Siemens Simatic PCS-7 med en styrenhet och en switch. Där efter implementerades Emerson Wireless gateway och två trådlösa instrument. I examanearbetet skapades även en logik som hanterar kommunikationen mellan simatic och gateway. Modbus RTU och TCP/IP är kommunikationsprotokollet som användes under arbetet. En undersökning om den uppsättningen klarar av de atex (ATmosphères EXplosibles )och sil (saftey integrity level ) krav gjordes, för att säkerställa om det finns möjligheter att implementera detta på dagens tillverkningsprocess. Utöver dessa kontrollerades om det råder för och nackdelar med den trådlösa allternativet inom IT-säkerhet, instrumentdiagnostik och störkänslighet. Arbetet fullgjordes på Siemens Industrial Turbomachinery i Finspång tillsammans med företagets utvecklingsavdelning för styrsystem.

  • 98.
    Algvere, Ebba
    Linköping University, Department of Computer and Information Science.
    Att designa effektivt lärande med blandade lärmiljöer: Hur lärmiljöer och dess aktiviteter inom blandade lärmiljöer påverkar kunskapsutveckling och förtroende för organisationen2019Independent thesis Basic level (degree of Bachelor), 12 credits / 18 HE creditsStudent thesis
    Abstract [sv]

    Denna studie har undersökt hur olika lärmiljöer inom ett utbildningsupplägg med blandade lärmiljöer skiljer sig i upplevelse, kunskapsutveckling samt förtroende. Vidare har studien undersökt om det finns någon skillnad mellan grupper, med prefererad ordning på lärmiljöer inom ett utbildningsupplägg med blandade lärmiljöer, och prefererad inläringsstil. Fyra olika inläringsstilar, av Honey och Mumford (2000), har använts i studien. Frågeställningarna har undersökts och besvarats genom en triangulering, en kombination av kvalitativa och kvantitativa metoder. Kvalitativ data har samlats in genom semistrukturerade intervjuer och har sedan följt en tematisk analysprocess. Kvantitativ data har erhållits genom ett frågeformulär som sedan har analyserats med statistiska tester. Resultaten från den kvalitativa intervjudelen har visat på att olika lärmiljöer, e-lärande och föreläsning, skiljer sig samt kompletterar varandra med avseende på upplevelse, kunskapsutveckling och förtroende för arbetsgivare. Kvantitativa resultat från frågeformulär har visat på att det inte finns någon signifikant skillnad mellan grupper, som föredrar att börja ett utbildningsupplägg med blandade lärmiljöer med olik första lärmiljö, och styrka i prefererad inläringsstil. Detta innebär att det inte finns någon direkt koppling mellan föredragen ordning på lärmiljöer inom blandade lärmiljöer och prefererad inläringsstil. Denna studie har studerat ett kunskapsgap för hur blandade lärmiljöer bör struktureras. Studiens fynd kan därmed bidra till en bättre förståelse för hur framtida utbildningsupplägg med blandade lärmiljöer bör designas för effektivt lärande och maximal kunskapsutveckling.

    Download full text (pdf)
    fulltext
  • 99.
    Ali, Islam
    et al.
    Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
    Iqbal, Wasim
    Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
    Performance analysis of various antennas at 2.45 GHz2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In this era of technology, there is a swift increase in the number of applications which operate at the Industrial Scientific Medical Band. The applications of this band ranges from home microwave oven to wireless local area networks (WLAN). Therefore, the design of antennas on this band is essential.

    This thesis work revolves around the detailed study and design of various antennas at 2.45 GHz. All the simulation of the antennas was performed using advanced design system (ADS). Microstrip antenna technology is commonly used in antenna design due to its advantages such as low-profile, small size and easy fabrication on printed circuit boards.

    Firstly, various antennas such as rectangular patch, square patch, dipole, inverted F and printed Yagi were designed using ADS and their different performance parameters such as input impedance matching, voltage standing wave ratio (VSWR), input reflection, and gain and directivity were discussed. Dipole antenna, inverted F and printed Yagi were fabricated on printed circuit board (PCB) to compare their measured and simulated results.

    At the end, a conclusion is drawn for different antennas based on their various performance parameters.

  • 100.
    Ali, M.
    et al.
    Helsinki University of Technology (TKK), Micronova, Department of Micro and Nanosciences, P.O. Box 3500, FIN-02015 TKK, Finland.
    Svensk, Olle
    Helsinki University of Technology (TKK), Micronova, Department of Micro and Nanosciences, P.O. Box 3500, FIN-02015 TKK, Finland.
    Zhen, Z.
    Helsinki University of Technology (TKK), Micronova, Department of Micro and Nanosciences, P.O. Box 3500, FIN-02015 TKK, Finland.
    Suihkonen, S.
    Helsinki University of Technology (TKK), Micronova, Department of Micro and Nanosciences, P.O. Box 3500, FIN-02015 TKK, Finland.
    Törmä, P.T.
    Helsinki University of Technology (TKK), Micronova, Department of Micro and Nanosciences, P.O. Box 3500, FIN-02015 TKK, Finland.
    Lipsanen, H.
    Helsinki University of Technology (TKK), Micronova, Department of Micro and Nanosciences, P.O. Box 3500, FIN-02015 TKK, Finland.
    Sopanen, M.
    Helsinki University of Technology (TKK), Micronova, Department of Micro and Nanosciences, P.O. Box 3500, FIN-02015 TKK, Finland.
    Hjort, Klas
    Department of Engineering Sciences, Uppsala University, P.O. Box 534, SE-75121 Uppsala, Sweden.
    Jensen, Jens
    Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, The Institute of Technology.
    Reduced photoluminescence from InGaN/GaN multiple quantum well structures following 40 MeV iodine ion irradiation2009In: Physica. B, Condensed matter, ISSN 0921-4526, E-ISSN 1873-2135, ISSN 0921-4526, Vol. 404, no 23-24, p. 4925-4928Article in journal (Refereed)
    Abstract [en]

    The effects following ion irradiation of GaN-based devices are still limited. Here we present data on the photoluminescence (PL) emitted from InGaN/GaN multiple quantum well (MQW) structures, which have been exposed to 40 MeV I ion irradiation. The PL is reduced as a function of applied ion fluence, with essentially no PL signal left above 1011 ions/cm2. It is observed that even the ion fluences in the 109 ions/cm2 range have a pronounced effect on the photoluminescence properties of the MQW structures. This may have consequences concerning application of InGaN/GaN MQW’s in radiation-rich environments, in addition to defect build-up during ion beam analysis.

1234567 51 - 100 of 5463
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf