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  • 251.
    Abrahamsson, Björn
    Linköping University, Department of Electrical Engineering.
    Architectures for Multiplication in Galois Rings2004Independent thesis Basic level (professional degree)Student thesis
    Abstract [en]

    This thesis investigates architectures for multiplying elements in Galois rings of the size 4^m, where m is an integer.

    The main question is whether known architectures for multiplying in Galois fields can be used for Galois rings also, with small modifications, and the answer to that question is that they can.

    Different representations for elements in Galois rings are also explored, and the performance of multipliers for the different representations is investigated.

  • 252.
    Abrahamsson, David
    Linköping University, Department of Computer and Information Science.
    Security Enhanced Firmware Update Procedures in Embedded Systems2008Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Many embedded systems are complex, and it is often required that the firmware in these systems are updatable by the end-user. For economical and confidentiality reasons, it is important that these systems only accept firmware approved by the firmware producer.

    This thesis work focuses on creating a security enhanced firmware update procedure that is suitable for use in embedded systems. The common elements of embedded systems are described and various candidate algorithms are compared as candidates for firmware verification. Patents are used as a base for the proposal of a security enhanced update procedure. We also use attack trees to perform a threat analysis on an update procedure.

    The results are a threat analysis of a home office router and the proposal of an update procedure. The update procedure will only accept approved firmware and prevents reversion to old, vulnerable, firmware versions. The firmware verification is performed using the hash function SHA-224 and the digital signature algorithm RSA with a key length of 2048. The selection of algorithms and key lengths mitigates the threat of brute-force and cryptanalysis attacks on the verification algorithms and is believed to be secure through 2030.

  • 253.
    Abrahamsson, Daysury
    Linköping University, Department for Studies of Social Change and Culture.
    Colombianer på bioduken: Representationen av tre Hollywoodproducerade actionfilmer2009Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The purpose of the thesis was to analyse three action films; Collateral Damage from 2002; Clear and Present Danger from 1994; and Scarface from 1983, in order to see how Colombians are represented in these movies.The action genre comprises of different stereotypes where the hero and the villain are represented in conjunction to each other. The analysis is about the way the films content and form are used to uphold the representation of Colombians, but also the villain and the hero more generally.

    Critical Discourse Analysis was used, as main method, and the concepts of denotation and connotation guided the analysis. . The main conclusion is that the three movies reproduced an already established collective stereotype of Latin Americans, stereotype that includes both Colombia and Colombians.

  • 254.
    Abrahamsson, Hanna
    et al.
    Linköping University, Department of Management and Engineering, Business Administration. Linköping University, Faculty of Arts and Sciences.
    Larsson, Louise
    Linköping University, Department of Management and Engineering, Business Administration. Linköping University, Faculty of Arts and Sciences.
    Media - makt att sätta företags agenda?: En kvantitativ studie om medias makt att påverka företags hållbarhetsredovisningar2016Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Introduction Lately, there has been a significant increase in sustainability related issues in media, while companies increasingly are reporting on sustainability. Media has a central role in today's society, and sustainability is emerging as one of the most contemporary issues in the business industry. Studies with a combination of media and sustainability are a fruitful field for future research.

    Purpose The aim of this study is to explain the relationship between medias sustainability exposure of companies and these companies' establishment and extent of a sustainability report.

    Method This quantitative study is pursued through a deductive approach in which the hypotheses are formulated with a background in existing theories. A cross-sectional design is used to measure the presence and the variation of a given phenomena at a certain time. Secondary data is used as the empirical basis. The study focuses on companies listed at Nasdaq Stockholm.

    Conclusion The results of this study indicate that medias' sustainability exposure of companies affects companies' establishment and extent of a sustainability report. Size, industry, profitability and number of subsidiaries are also significant factors. We have found that media is a primary factor in explaining why companies choose to report on sustainability issues. For every news story about a given company in a sustainability context – the likelihood of that company establishing a sustainability report is increased by 2,491. This study also proves that increased media exposure leads to a more extensive sustainability reporting.

  • 255.
    Abrahamsson, Heléne
    et al.
    Linköping University, Department of Thematic Studies.
    Adolfsson, Anna
    Linköping University, Department of Thematic Studies.
    Varför, och varför inte, integrerar NO-lärare ämnena i grundskolan?2005Independent thesis Advanced level (degree of Magister)Student thesis
    Abstract [sv]

    Under vår skolförlagda utbildning har vi varit på olika skolor, där vi sett att lärarnas undervisning varierade stort i dessa skolor. Vi undrar varför det är så mycket ämnesstrukturerad undervisning ute på skolorna och varför inte lärarna undervisar mer ämnesintegrerat när vi ser att det finns möjligheter till detta. En av de viktigaste uppgifterna som verksamma lärare bör ha, är att ge eleverna möjligheter till överblick och sammanhang mellan ämnen. Syftet med vår studie var att undersöka varför lärarna integrerar och varför inte lärarna integrerar i skolorna. Vår undersökning grundar sig på telefonintervjuer med 25 lärare från två kommuner.

    Vår studie visar att lärarna integrerar ämnena för att eleverna ska förstå samband och se helheter. Flertalet av lärare undervisar utifrån ett arbetsområde där de utgår från den stora helheten för att sedan leda in undervisningen till delar och små bitar. Vid verklighetsrelaterad undervisning kan undervisningen bli integrerad och när eleverna känner igen sig, har eleverna lättare att ta till sig undervisningen, menar lärarna i vår studie.

    Svårigheter som kan uppstå vid integrerad undervisning är t ex olika lärarkategorier och att integrerad undervisning kräver en tidskrävande planering samt brist på integrerat läromedel. Det fanns lärare som deltog i studien som ansåg sig lägga ner mycket tid och kraft att skapa eget integrerat läromedel. 20 stycken lärare i studien undervisar huvudsakligen integrerat men de undervisar också ämnesstrukturerat. Med varierade undervisningsformer kan lärarna nå ut till fler elever då åsikterna gått isär om vilken undervisningsform som gagnar vem.

  • 256.
    Abrahamsson, Henrik
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering.
    Carlson, Peter
    Linköping University, The Institute of Technology.
    Robust Torque Control for Automated Gear Shifting in Heavy Duty Vehicles2008Independent thesis Advanced level (professional degree), 20 points / 30 hpStudent thesis
    Abstract [en]

    In an automated manual transmission it is desired to have zero torque in the transmission when disengaging a gear. This minimizes the oscillations in the driveline which increases the comfort and makes the speed synchronization easier. The automated manual transmission system in a Scania truck, called Opticruise, uses engine torque control to achieve zero torque in the transmission.In this thesis different control strategies for engine torque control are proposed in order to minimize the oscillations in the driveline and increase the comfort during a gear shift. A model of the driveline is developed in order to evaluate the control strategies. The main focus was to develop controllers that are easy to implement and that are robust enough to be used in different driveline configurations. This means that model dependent control strategies are not considered.A control strategy with a combination of a feedback from the speed difference between the output shaft speed and the wheel speed, and a feedforward with a linear ramp, showed very good performance in both simulations and tests in trucks. The amplitude of the oscillations in the output shaft speed after neutralengagement are halved compared to the results from the existing method in Scania trucks. The new concept is also more robust against initial conditions and time delay estimations.

  • 257.
    Abrahamsson, Ida
    et al.
    Linköping University, Department of Management and Engineering, Business Administration. Linköping University, Faculty of Arts and Sciences.
    Tornberg, Markus
    Linköping University, Department of Management and Engineering, Business Administration. Linköping University, Faculty of Arts and Sciences.
    Styrning i skolvärlden: En komparativ studie med fokus på rektorns förutsättnngar i kommunal skola respektive friskola2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This study is intended to investigate the prerequisites for the principals to perform their work and whether they differ between schools. This has been investigated by studying the underlying management structure and the management instrument and how they have shaped the prerequisites for the principals. The study is based on interviews with princi- pals and a quality director from both public school and private school. The study shows that the management instruments goals, communication, mandate and decision as well as support functions, and to some extent the management structure, shapes the prerequisites for the principals. These management instrument have also been looked into more thor- oughly, in order to see how well they work to create the right conditions for the principals in the public school and private school. From the results that was obtained from this study, we could see that the management instruments don’t work optimally in order to give the right prerequisites for the principals. Mainly have the results shown that the principals in the private school have better perquisites than the principals working in the public school.

  • 258.
    Abrahamsson, Jesper
    Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
    Ett försprång till skapande - en undersökning om förutsättningarna för Musikproduktion på Kulturskolan2008Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med rapporten är att undersöka förutsättningarna för en introduktionskurs i musikproduktion på Kulturskolan i Karlskrona, samt att utforma en övergripande plan för undervisningen. Arbetet omfattar även en mindre undersökning av eventuella liknande kurser på kulturskolor i tolv större svenska städer. För att besvara frågeställningarna har intervjuer genomförts med lärare och ledning på Kulturskolan i Karlskrona, anställda på kulturskolor på andra orter, musikgymnasium i Karlskrona samt på kommunens kulturförvaltning. Undersökningen visade att endast två av tolv städer har motsvarande eller liknande kurser på sina kulturskolor. De materiella förutsättningarna för en musikproduktionskurs på Kulturskolan i Karlskrona är goda, i form av lokaler med befintlig ljudutrustning och programvara. När det gäller ekonomiska förutsättningar kommer Kulturskolans intäkter från elevavgifter och kommunala medel. Kursen skulle innebära en utgift för lärarlön, men i övrigt går den att starta utan ytterligare kostnader. På kommunens kulturförvaltning menar man att det är viktigt med bredd i Kulturskolans kursutbud och att en musikproduktionskurs kan berika det lokala kulturlivet. Kursen är tänkt att fokusera på musik med datorn. Momenten bör kretsa kring inspelningsprogram, mjukvaruinstrument, plugin-program, med inslag av arrangering och mixning. Kursens målsättningar ligger i linje med Kulturskolans policydokument och är inspirerade av liknande kurser på andra kulturskolor.

  • 259.
    Abrahamsson, Kenneth
    et al.
    Department of Business Administration, Technology and Social Sciences, Human Work Science, Luleå univeristet.
    Abrahamsson, LenaDepartment of Business Administration, Technology and Social Sciences, Human Work Science, Luleå univeristet.Björkman, TorstenDepartment of Business Administration, Technology and Social Sciences, Human Work Science, Luleå univeristet.Ellström, Per-ErikLinköping University, HELIX Vinn Excellence Centre. Linköping University, Department of Behavioural Sciences and Learning, Work and Working Life. Linköping University, Department of Behavioural Sciences and Learning, Education and Sociology. Linköping University, Faculty of Arts and Sciences.Johansson, JanDepartment of Business Administration, Technology and Social Sciences, Human Work Science, Luleå univeristet.
    Utbildning, kompetens och arbete2002Collection (editor) (Other academic)
    Abstract [sv]

    Syftet med denna bok är att ge en översiktsbild av forskning om samspelet mellan utbildning, yrkesverksamhet och lärande. Avsikten är också att överbrygga klyftan mellan en i huvudsak utbildningsinriktad forskning och en forskning med tonvikt på lärande, utveckling och förändring. Fokus är kompetensförsörjningen till och inom arbetslivet. Uppmärksamhet ägnas även överutbildning och underlärande, dvs. den klassiska frågan om matchning mellan utbud och efterfrågan. Innehållet belyser även yrkesbegreppet och hur kvalifikationskraven ändras eller är stabila över tid i olika verksamheter samt villkoren för lärande på arbetsplatsen.

    Förutom en översikt av aktuell svensk forskning syftar boken till att skapa underlag för policyutveckling och konkreta insatser när det gäller villkoren för kompetensförsörjning och lärande i arbetslivet. Boken riktar sig till utbildningar i högskolan i allmänhet och lärarutbildningar i synnerhet med syfte att skapa ökad insikt om hur kunskap utvecklas och nyttiggörs i utbildning och arbetsliv. En annan målgrupp är politiker, utbildningsplanerare och företrädare för arbetsmarknadspolitik och arbetsmarknadens parter med intresse för hur utbildning, arbetsmarknad och välfärd utvecklas i Sverige.

  • 260.
    Abrahamsson, Lars
    Linköping University, Department of Electrical Engineering.
    A portal based system for indoor environs2006Independent thesis Basic level (professional degree), 20 points / 30 hpStudent thesis
    Abstract [en]

    The purpose of this thesis is to document the development of the graphics part of an extremely pluggable game engine/lab environment for a course in advanced game programming. This thesis is one out of five, and concerns indoor, realtime computer 3D graphics. It covers state-of-the-art techniques such as GLSL - the OpenGL Shading Language - and more well known techniques such as portal based rendering.

  • 261. Abrahamsson, Lena
    et al.
    Bengtsson, Lars
    Gremyr, Ida
    Kowalkowski, Christian
    Linköping University, Department of Management and Engineering, Industrial Marketing and Industrial Economics. Linköping University, The Institute of Technology.
    Lindahl, Marcus
    Nilsson, Anders
    Rehn, Alf
    Segerstedt, Anders
    Säfsten, Kristina
    Öhman, Peter
    Industriell ekonomi och organisering2016Book (Refereed)
  • 262.
    Abrahamsson, Linn
    et al.
    Linköping University, Department of Computer and Information Science, Software and Systems.
    Melin Wenström, Peter
    Linköping University, Department of Computer and Information Science, Software and Systems.
    Användning av prototyper som verktyg för kravhantering i agil mjukvaruutveckling: - En fallstudie2018Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Requirements Engineering (RE) in Agile Software Development (ASD) is a challenge thatmany face and several techniques exist when doing so. One such technique is prototyping, when a model of a product is used to gather important information in software develop-ment. To describe how much a prototype resembles the product the notion of fidelity is used. The aim of this study is to contribute to research regarding prototyping in ASD,and to examine the effect of a prototype’s fidelity when using prototypes in discussionsduring RE. A case study is performed at the company Exsitec where staff are interviewedregarding prototyping in software development. Thereafter, two prototypes of low andhigh fidelity are developed and used in interviews as a basis for discussion. Based on thisstudy, the use of prototypes in software projects can help customers trust the process,improve communication with customers, and facilitate when trying to reach consensusamong different stakeholders. Furthermore, depending on how they are used, prototypescan contribute to understanding the big picture of the requirements and can also serve asdocumentation. The study also shows some, albeit subtle, differences in the informationcollected using prototypes with low and high fidelity. The use of a high fidelity prototypeseems to generate more requirements, but makes interviewees less likely to come up withlarger, more comprehensive requirement changes.

  • 263.
    Abrahamsson, Liselott
    Linköping University, Department of Educational Science (IUV).
    Fristående skolor1999Independent thesis Basic level (professional degree)Student thesis
    Abstract [sv]

    Detta examensarbete handlar bl.a. om hur man kan gå tillväga om man vill starta en fristående skola. Arbetet tar också upp några olika inriktningar en friskola kan ha, (t.ex. Waldorf och Montessori) och beskriver lite av deras bakgrund och pedagogik. Eftersom friskolor idag är ett hett debatteringsämne i både tidningar och tv finns även ett avsnitt med där lite olika inslag i debatten finns representerade. I arbetet redovisas också den enkätundersökning jag gjort med syftet att ta reda på om det möjligtvis finns några skillnader mellan friskoleelever och elever i den kommunala skolan när det gäller deras syn på lärande, kunskap och skolan. De resultat jag kan utläsa av undersökningen pekar mot att friskoleleverna i den här undersökningen är positivare och mer nöjda med sin skola och personalen där än vad eleverna från de medverkande kommunala klasserna är.

  • 264.
    Abrahamsson, Louise
    Linköping University, Department of Thematic Studies, Tema Environmental Change.
    Improving methane production using hydrodynamic cavitation as pre-treatment2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    To develop anaerobic digestion (AD), innovative solutions to increase methane yields in existing AD processes are needed. In particular, the adoption of low energy pre-treatments to enhance biomass biodegradability is needed to provide efficient digestion processes increasing profitability. To obtain these features, hydrodynamic cavitation has been evaluated as an innovative solutions for AD of waste activated sludge (WAS), food waste (FW), macro algae and grass, in comparison with steam explosion (high energy pre-treatment). The effect of these two pre-treatments on the substrates, e.g. particle size distribution, soluble chemical oxygen demand (sCOD), biochemical methane potential (BMP) and biodegradability rate, have been evaluated. After two minutes of hydrodynamic cavitation (8 bar), the mean fine particle size decreased from 489- 1344 nm to 277- 381 nm (≤77% reduction) depending of the biomasses. Similar impacts were observed after ten minutes of steam explosion (210 °C, 30 bar) with a reduction in particle size between 40% and 70% for all the substrates treated.  In terms of BMP value, hydrodynamic cavitation caused significant increment only within the A. nodosum showing a post treatment increment of 44% compared to the untreated value, while similar values were obtained before and after treatment within the other tested substrates. In contrast, steam explosion allowed an increment for all treated samples, A. nodosum (+86%), grass (14%) and S. latissima (4%). However, greater impacts where observed with hydrodynamic cavitation than steam explosion when comparing the kinetic constant K. Overall, hydrodynamic cavitation appeared an efficient pre-treatment for AD capable to compete with the traditional steam explosion in terms om kinetics and providing a more efficient energy balance (+14%) as well as methane yield for A. nodosum.

  • 265.
    Abrahamsson, Marcus
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    A platform for third-party applications on the web2013Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    A trend seen on the web today is to create a platform where externally developed applications can run inside some kind of main application. This is often done by providing an API to access data and business logic of your service and a sandbox environment in which third-party applications can run. By providing this, it is made possible for external developers to come up with new ideas based on your service. Some good examples on this are Spotify Apps, Apps on Facebook and SalesForce.com.

    Ipendo Systems AB is a company that develops a web platform for intellectual properties. Currently most things on this platform are developed by developers at Ipendo Systems AB. Some interest has though risen to enable external developers to create applications that will in some way run inside the main platform.

    In this thesis an analysis of already existing solutions has been done. These solutions were Spotify Apps and Apps on Facebook. The two have different approaches on how to enable third-party applications to run inside their own service. Facebook’s solution builds mainly on iframe embedded web pages where data access is provided through a web API. Spotify on the other hand hosts the third-party applications themselves but the applications may only consist of HTML5, CSS3 and JavaScript.

    In addition to the analysis a prototype was developed. The purpose of the prototype was to show possible ways to enable third-party applications to run inside your own service. Two solutions showing this were developed. The first one was based on Facebook’s approach with iframing of external web pages. The second was a slightly modified version of Spotify’s solution with only client-side code hosted by the main application. To safely embed the client side code in the main application a sandboxing tool for JavaScript called Caja was used.

    Of the two versions implemented in the prototype was the Iframe solution considered more ready to be utilized in a production environment than Caja. Caja could be seen as an interesting technique for the future but might not be ready to use today. The reason behind this conclusion was that Caja decreased the performance of the written JavaScript as well as adding complexity while developing the third-party applications.

  • 266.
    Abrahamsson, Mats
    Linköping University, Department of Management and Engineering, Logistics & Quality Management. Linköping University, Faculty of Science & Engineering.
    Affärsmodeller för citylogistik & samordnad varudistribution: Handbok för kommuner och privata aktörer2017Report (Other (popular science, discussion, etc.))
    Abstract [sv]

    Den här handboken är resultatet av forskningsprojektet ”Affärsmodeller för citylogistik” som har finansierats av Vinnova och genomförts av forskare på Linköpings Universitet vid avdelningen Logistik- & Kvalitetsutveckling under perioden 2015 – 2017. Projektet är en direkt uppföljning av Färdplan Citylogistik – Godstransporter i urbana miljöer som visade att citylogistik och samordnad varudistribution behövs för att kunna driva utvecklingen mot mer hållbara och attraktiva städer med emissionsfria godstransporter. Den här boken presenterar en modell som syftar till att hjälpa kommuner och företag att komma igång med citylogistik och samordnad varudistribution – En affärsmodell som också fungerar som ett beslutsunderlag. Projektet grundar sig också i Forsknings- och innovationsagenda för framtidens logistik, där citylogistik lyfts fram som ett av de viktigaste utvecklingsområdena inom logistikområdet i framtiden.

  • 267.
    Abrahamsson, Mats
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Dagens Managementverktyg är alldeles för trubbigt.2004In: TH : Transport & Hantering, ISSN 0346-2773, Vol. 5, p. 20-21Article in journal (Other (popular science, discussion, etc.))
  • 268.
    Abrahamsson, Mats
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Det är skillnad på elitserien och lägre divisioner2004In: TH : Transport & Hantering, ISSN 0346-2773, Vol. 4Article in journal (Other (popular science, discussion, etc.))
  • 269.
    Abrahamsson, Mats
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Logistics in the Strategy of the Firm2007In: NOFOMA,2006, 2007, p. 15-20Conference paper (Refereed)
  • 270.
    Abrahamsson, Mats
    Linköping University, Department of Management and Engineering, Logistics & Quality Management. Linköping University, Faculty of Science & Engineering.
    Logistik för ökad svensk konkurrenskraft: Forsknings- och innovationsagenda för framtidens logistik2013Report (Other academic)
    Abstract [sv]

    Framtidens logistik står inför mycket stora utmaningar som har direkt bäring på svenska företags och organisationers förmåga till tillväxt, hållbarhet och konkurrenskraft. 

    Det står utom all tvivel att logistikens betydelse kommer att öka ännu mer i framtiden. Vinnare på de globala, rörliga marknaderna kommer ett vara de flödeseffektiva företagen, som har förmåga att hantera förändringarna på marknaden med en effektiv logistik som grund. För att lyckas behövs ett Logistiklyft för Sverige, med ett medvetet fokus på att utveckla de dynamiska förmågorna i företag och organisationer. Detta gäller i de allra flesta branscher och typ av företag.

    Den här innovations- och forskningsagendan utgår från den svenska traditionen och internationellt sett unika kunskapen och förmågan att med en systemsyn som grund designa, utveckla och styra komplexa system där flera olika kompetenser samverkar. Logistikens systemkunskap handlar om att lära sig att utforma och styra omfattande och allt mer komplexa försörjningskedjor (supply chains) från råvara till slutkund i syfte att öka svenska företags internationella konkurrenskraft och förmåga att växa på ett miljömässigt och ekonomiskt hållbart sätt

    Agendan adresserar behovet av kompetens och kunskap för mer innovativ logistikutveckling som följer:

    • Utveckling av kunskap om nya och mer innovativa logistiksystem och modeller för industri & handel 
    • Tjänsteutveckling för transport/logistik och IT-företag som stöd för mer innovativa logistiksystem, men också att ta till vara och stimulera den omfattande tjänsteutveckling som finns i förnyelsen av svenskt näringsliv, t ex mot högre grad av e-handel. 
    • Tillämpning av befintliga logistikkunskaper för områden och sektorer i behov av ett logistiklyft och ökad flödeseffektivitet, t.ex. logistik för små- och medelstora företag (SME) med fokus på HUR (genomförandeprocesser) istället för VAD (utformning av koncept och modeller). 
    • Utveckling av kunskaper om hur logistiksystem kan bidra till en hållbar utveckling, såväl miljömässigt som socialt.
    • Utveckling av kunskap om och tillämpning av logistiklösningar med primär samhällsnytta, t ex sjukvårdslogistik och citylogistik samt effektiv och hållbar försörjning av livsmedel, energi etc.

    Den här forsknigs- och innovationsagendan är utvecklad i samarbete mellan Linköpings Universitet, Lunds Tekniska Högskola, Chalmers Tekniska Högskola och en lång rad företag där Axis, SKF, Volvo och Nobel Biocare har funnits med i projektets styrgrupp. 

    Agendan finns endast som PDF. Kontakta Mats Abrahamsson, Linköpings Universitet. mats.abrahamsson@liu.se

  • 271.
    Abrahamsson, Mats
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Nya tider kräver nya managementverktyg2003In: Management magazine, ISSN 1651-8055, Vol. 2Article in journal (Other academic)
    Abstract [sv]

       

  • 272.
    Abrahamsson, Mats
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    The Role of Logistics in Corporate Strategy2010In: Dimensionen der Logistik / [ed] in Schönberger, R., & Elbert, R., Heidelberg: Gabler Research , 2010, p. 533-552Chapter in book (Other academic)
    Abstract [de]

    Funktionen, Institutionen und Handlungsebenen beschreiben die drei Dimensionen des von Professor Dr. Dr. h.c. Hans-Christian Pfohl geschaffenen Logistikwürfels. Anlässlich seiner Emeritierung beleuchten Wissenschaftler und Praktiker in 75 Fachbeiträgen die Logistik mit all ihren Facetten und aktuellen Entwicklungen und geben Anregungen für die zukünftige Forschung und Praxis.

  • 273.
    Abrahamsson, Mats
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    The Role of Logistics in Corporate Strategy2008In: Northern lights in logistics & supply chain management / [ed] Stentoft, Halldorsson, Jahre, Spens, Copenhagen: Copenhagen Business School Press, 2008, 1, p. 49-66Chapter in book (Refereed)
    Abstract [en]

    "Northern Lights in Logistics & Supply Chain Management" portrays the past, present and future research of the subject in the Nordic countries. The NOFOMA conference - a network of Nordic researchers within the field of Logistics and Supply Chain Management - has been a focal point in the contribution to the continuous improvement and further development of Nordic research. The network has also opened up for interaction with fellow researchers from other countries. There are sixteen chapters in the book that in its own way colours the Nordic rainbow of research within Logistics and Supply Chain Management. The chapters are structured in four themes: 1) Origins and strategic aspects; 2) Research approaches in the Nordic countries; 3) Advancement of distribution strategies and; 4) Emerging application areas of logistics and SCM. The chapters provide an understanding and, perhaps more importantly, consciousness for scholars that are part of this research environment: Where are we now, what have we been influenced by, and in what area are we able to provide positive impact? The aim of the book is also to contribute to increased visibility to fellow international scholars within Logistics and Supply Chain Management.

  • 274.
    Abrahamsson, Mats
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Aldin, Niklas
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Stahre, Fredrik
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Logistics Platforms for Improved Dynamic Effectiveness2003In: International Journal of Logistics Management, ISSN 0957-4093, E-ISSN 1758-6550, Vol. 3Article in journal (Refereed)
  • 275.
    Abrahamsson, Mats
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Aronsson, Håkan
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    A model for measuring logistics structures2003In: ESTIEM magazine, ISSN 0874-5242, Vol. 25, no 2/2003Article in journal (Other academic)
    Abstract [en]

      

  • 276.
    Abrahamsson, Mats
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Aronsson, Håkan
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Ett avancerat laboratorium för visualisering av logistiksystem2004In: TH : Transport & Hantering, ISSN 0346-2773, Vol. 3, p. 18-19Article in journal (Other (popular science, discussion, etc.))
  • 277.
    Abrahamsson, Mats
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Aronsson, Håkan
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Measuring Logistics Structure1999In: International Journal of Logistics Management, ISSN 0957-4093, E-ISSN 1758-6550, Vol. 2, no 3, p. 263-284Article in journal (Refereed)
  • 278.
    Abrahamsson, Mats
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Aronsson, Håkan
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Lindskog, Magnus
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Beyond the Beer-Game: An Arena for Visualising Complex Logistics Systems.2004In: Annual NOFOMA Conference for Nordic Researchers in Logistics: Challenging Boundaries with Logistics.,2004, Linköping: Linköpings universitet , 2004Conference paper (Refereed)
  • 279.
    Abrahamsson, Mats
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Engineering, Logistics .
    Brege, Staffan
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Engineering, Industrial Marketing and Industrial Economics .
    Dynamic effectiveness: Improved industrial distribution from interaction between marketing and logistics strategies2005In: Journal of Distribution Channels, ISSN 1046-669X, E-ISSN 1540-7039, Vol. 12, no 2, p. 83-112Article in journal (Refereed)
    Abstract [en]

    Based on different observations, in theory as well as in practice, we have identified strategies and operations following two different tracks, striving in different directions, despite it being well known they should go hand in hand. For companies challenged by a more and more dynamic business environment with heavier market segmentation, additional marketing channels, increasing globalisation on supplier and customer side, and high pressure on profit margins, the result from this is competitive weakness. The purpose of this article is to switch focus from operational effectiveness and strategic positioning as static success concepts on how to improve industrial distribution, to dynamic challenges of how to continuously manage the interaction between marketing strategies and operations (e.g., logistics) under the influence of a dynamic business environment. From theories in market strategies, logistics, flexibility, and marketing channels together with empirical experience from a best practice case study, we are introducing a model for dynamic effectiveness, describing the different characteristics of a company and what to focus on in order to become more dynamic. In order to constantly move to new market positions, and at the same time, restructure logistics and improve operational effectiveness, we have identified the dynamic capabilities of an organisation to be the key to success in industrial distribution. We define dynamic effectiveness as "how fast-and-well a company can go from one strategic positioning and productivity frontier to another." It tells that a frequent interaction between new strategic moves and actions for higher operational effectiveness is required to be in pace with the dynamic and changing business environment and to stay ahead of competition. As a part, of this, best, practice logistics performance makes it possible not only to be more agile to new strategic moves, but also to drive strategic development from a high operational level. This is achieved by designing logistics to be a resource base to support and be an enabler for new strategic moves on the market. © 2004 by The Haworth Press, Inc. All rights reserved.

  • 280.
    Abrahamsson, Mats
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Brege, Staffan
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Industrial marketing.
    Dynamic Effectiveness - Improved Industrial Distribution from Interaction between Marketing and Logistics Strategies2004In: Journal of Distribution Channels, ISSN 1046-669X, E-ISSN 1540-7039, Vol. 12, no 2, p. 83-112Article in journal (Refereed)
  • 281.
    Abrahamsson, Mats
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Brege, Staffan
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Industrial marketing.
    Norrman, Andreas
    Lunds universitet.
    Distribution Channel Reengineering - organizational separation of distribution and sales functions in the European market1998In: Transport Logistics, ISSN 0929-9645, E-ISSN 1568-5705, Vol. 1, no 4, p. 237-249Article in journal (Refereed)
  • 282.
    Abrahamsson, Mats
    et al.
    Linköping University, Department of Management and Engineering, Logistics & Quality Management. Linköping University, Faculty of Science & Engineering.
    Christopher, Martin
    Cranfield School of Management, Cranfield, Bedford, UK.
    Stensson, Bo-Inge
    SKF, Sverige.
    Mastering Supply Chain Management in an era of uncertainty at SKF2015In: Global Business and Organizational Excellence: a review of research & best practices, ISSN 1932-2054, Vol. 34, no 6, p. 6-17Article in journal (Other academic)
    Abstract [en]

    To stay ahead in an increasingly competitive business environment, organizations need agile supply chain systems that are holistically designed and managed. The experiences of SKF, a Swedish multinational firm, point to the benefits of reengineering upstream capabilities to create value downstream. To foster the flexibility, responsiveness, and other dynamic capabilities needed to manage increased supply chain complexity, the company established programs to involve its suppliers in the value creation process, making them an extension of the organization’s resource base. The overall objective has been to migrate from a business model based on economies of scale in operations to one that exploits both economies of scope and economies of integration. As a result of its efforts to create a more agile and cost-efficient supply chain, the company has been able to decrease supply risks while improving its value creation process and responsiveness to new customer demands and advancing its sustainability and social responsibility initiatives. 

  • 283.
    Abrahamsson, Mats
    et al.
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Karlöf, Stefan
    Sonat, Sverige.
    Det dynamiska företaget: om följsamhet och flödesorienterade affärsmodeller2011 (ed. 1)Book (Other (popular science, discussion, etc.))
    Abstract [sv]

    Dagens osäkra affärsklimat betraktas av många som ett problem och en risk som måste hanteras. I den här boken vänder författarna på perspektivet och betraktar osäkerheten som en möjlighet till framgång - om företaget har tillräcklig dynamisk förmåga. Den dynamiska förmågan innebär att företaget snabbt kan förändra sin marknadsstrategi och sin dagliga verksamhet. Det kräver en tydlig och flödesorienterad affärsmodell med en effektiv och följsam kedja från leverantör till slutkund. Denna bok presenterar en modell för hur företaget kan uppnå en sådan dynamisk effektivitet och diskuterar hur man kan omsätta den i praktisk handling. Boken vänder sig till chefer och ledningsgrupper i företag som vill utvecklas i takt med omvärldens krav och därmed få bäst förutsättningar att överleva och växa i det krävande affärsklimatet - survival of the fittest!

  • 284.
    Abrahamsson, Mats
    et al.
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Malmgren, Mike
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Andersson, Dan
    Chalmers.
    Inside the Core: Managing risks in Business Critical Outsourcing2011In: Proceedings of the 20th Annual IPSERA Conference, Vision 20/20 – Preparing Today for Tomorrow’s Challenges / [ed] F. Rozemeijer, M. Wetzels, L. Quintens, 2011, p. 1092-1101Conference paper (Refereed)
    Abstract [en]

    Organizations are increasingly outsourcing business critical activities, which increases the risk of substantial negative impact on the financial and strategic business performance. The aim of this paper is to show how outsourcer and supplier seek to mitigate the risks during the negotiations and the ongoing operations of the outsourced activities. The conclusion is that risk mitigating dimensions are directional and operates at different organizational levels, and secondly, that the dimension operates sequentially as a means to mitigate performance and relational risks. It is also concluded that goodwill trust and a cooperative stance have substantial impact on the success of the outsourcing.

  • 285.
    Abrahamsson, Mats
    et al.
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Malmgren, Mike
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Andersson, Dan
    Chalmers.
    Managing risk in complex and business critical outsourcing of services2011In: Proceedings of 18th International Annual Conference of the European Operations Management Association. EurOMA, 2011Conference paper (Refereed)
    Abstract [en]

    Over the past two decades the phenomenon of outsourcing of resources and activities has emerged as an important trend in a wide range of organizations and many companies are today outsourcing complex and business critical resources and activities. This increase in business criticality also increases the risk of substantial and negative impact on the financial and strategic performance. The proposition is that business critical outsourcing is approached with a joint risk perspective and that an understanding of the decision process is essential for success. Further, it is important to view outsourcing as an ongoing process with a number of key stages.

  • 286.
    Abrahamsson, Mats
    et al.
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Rehme, Jakob
    Linköping University, Department of Management and Engineering, Industrial Marketing and Industrial Economics. Linköping University, The Institute of Technology.
    The Role of Logistics in Retailers' Corporate Strategy: A Driver for Growth and Customer Value2010In: Supply Chain Forum: an International Journal, ISSN 1625-8312, E-ISSN 1624-6039, Vol. 11, no 4, p. 14-23Article in journal (Refereed)
    Abstract [en]

    This article explores the role of logistics and supply chain management (SCM) in retailers’ corporate strategy and is based on reviewing multiple qualitative case studies of companies in the Swedish food retail sector. The article proposes that the role of logistics for what is referred to in this paper as modern retailers is twofold: to create profitability and to support growth and market expansion. International modern retailers are empirically compared with similar companies in the Swedish market. The dominating Swedish food retailers have taken command in the food supply chain but are primarily concerned with traditional logistics roles in cost cutting. This role is perfectly fine as long as the strategic intent of the companies is focused on market retention and not on geographical expansion and/or new marketing or store concepts. We argue that the success of modern retailers in terms of growth rate, profitability, and market expansion is explained to a large extent by the role of logistics in corporate strategy—when the role for supporting growth and increasing customer value from high-performance supply capabilities is a driver for market expansion. However, in many of our cases the traditional logistics roles of cutting costs and lead-times is still the dominating pattern that limits the possibility of expanding into new markets. Better knowledge of logistics’ role in retail corporate strategy can help companies develop and improve their strategic intent as well as redefine the role of logistics.

  • 287.
    Abrahamsson, Mats
    et al.
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Rehme, Jakob
    Linköping University, Department of Management and Engineering, Industrial Marketing and Industrial Economics. Linköping University, The Institute of Technology.
    Sandberg, Erik
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Olle, Olsson
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    The Role of Buying Groups in Retail Logistics2010Conference paper (Refereed)
  • 288.
    Abrahamsson, Mats
    et al.
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Rehme, Jakob
    Linköping University, Department of Management and Engineering, Industrial Marketing and Industrial Economics. Linköping University, The Institute of Technology.
    Sandberg, Erik
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Olsson, Olle
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    The role of purchasing groups in retail logistics2012In: Nordic Retail Research: Emerging Diversity / [ed] Johan Hagberg, Ulrika Holmberg, Malin Sundström, Lars Walter, Göteborg: Bokförlaget BAS , 2012, 1, p. 155-172Chapter in book (Other academic)
    Abstract [en]

    This book aims to provide an illustration of the diversity that characterises contemporary Nordic research in the field of retail. The book draws on a large variety of methods, describes a variety of retail sectors and covers a large number of retail phenomena. The book is suitable for researchers, graduate students and professionals who want to learn more about contemporary retailing research

  • 289.
    Abrahamsson, Mats
    et al.
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Sandberg, Erik
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Rehme, Jakob
    Linköping University, Department of Management and Engineering, Industrial Marketing and Industrial Economics. Linköping University, The Institute of Technology.
    Logistik i svensk handel: Ett projekt finansierat av Handelns Utvecklingsråd2011Report (Other academic)
    Abstract [sv]

    Den här rapporten sammanfattar ett forskningsprojekt, Logistik i svensk handel, som har pågått under perioden juli 2009 t.o.m. februari 2011 och som är finansierat av Handelns Utvecklingsråd.

    En utgångspunkt och hypotes för projektet var att det finns avgörande branschmässiga skillnader i sättet att arbeta med logistikfrågor. En hypotes som har testats mot empirin, vilket har lett till slutsatsen att logistiken endast i begränsad omfattning är branschspecifik och att branschtillhörighet inte är den avgörande faktorn för hur logistiken utformas för handelsföretag. En viktigare faktor, är hur butikerna drivs visavi centrala enheter, hur integrationen ser ut mellan logistikstrategi och inköps- respektive marknadsstrategi, samt hur systemgränserna för logistiken definieras.

    Genom hela arbetet har vi jämfört den logistikbild vi har sett med en ”ideal bild”, i form av logistiken i internationell ”mega-retailing”, vilket idag representerar ”best practice” inom logistik och där logistiken är en integrerad del av företagens affärsmodell och ett direkt stöd för företagets lönsamhet och tillväxt. Den jämförelsen visar att det är mycket stora skillnader i logistikkompetens och mognad mellan olika företag och att logistik inom många handelsföretag fortfarande är ett område med stor förbättringspotential.

    Förutom den här rapporten har projektet genererat en lång rad akademiska artiklar som är publicerade i journaler och/eller har presenterats på konferenser och seminarier. Vi har varit i kontakt med ett stort antal, kollegor, företag och forskare i Sverige och andra länder för att samla material. Ett stort tack till alla de som har bidragit med material till projektet.

    Ett speciellt tack till Andreas Hedlund på Handelns Utvecklingsråd, som förutom finansiellt stöd har backat upp projektet med seminarier arrangerade av Handelns utvecklingsråd.

    Linköping i Maj 2011

    Mats Abrahamsson   Jakob Rehme   Erik Sandberg

  • 290.
    Abrahamsson, Mats
    et al.
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Stahre, Fredrik
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Huge-Brodin, Maria
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Rehme, Jakob
    Linköping University, Department of Management and Engineering, Industrial Marketing and Industrial Economics. Linköping University, The Institute of Technology.
    Andersson, Dan
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Logistics Changes and Challenges in Swedish Food Supply Chains2008In: Nofoma 2008, 2008Conference paper (Refereed)
  • 291.
    Abrahamsson, Mats
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Wandel, Sten
    Lunds universitet.
    Model of Tiering in Third Party Logistics with a Service Parts Distribution Case Study1998In: Transport Logistics, ISSN 0929-9645, E-ISSN 1568-5705, Vol. 1, no 3, p. 181-194Article in journal (Refereed)
  • 292.
    Abrahamsson, Nina Sofia
    et al.
    Linköping University, Department of Behavioural Sciences and Learning.
    Sandström, Anna
    Linköping University, Department of Behavioural Sciences and Learning.
    "Jag känner mig ju hel med extra tillagt liksom": En diskursanalytisk intervjustudie med personer som kan kategoriseras som mixed race i dagens Sverige2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
  • 293.
    Abrahamsson, Olle
    Linköping University, Department of Mathematics, Mathematics and Applied Mathematics. Linköping University, Faculty of Science & Engineering.
    A Gröbner basis algorithm for fast encoding of Reed-Müller codes2016Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    In this thesis the relationship between Gröbner bases and algebraic coding theory is investigated, and especially applications towards linear codes, with Reed-Müller codes as an illustrative example. We prove that each linear code can be described as a binomial ideal of a polynomial ring, and that a systematic encoding algorithm for such codes is given by the remainder of the information word computed with respect to the reduced Gröbner basis. Finally we show how to apply the representation of a code by its corresponding polynomial ring ideal to construct a class of codes containing the so called primitive Reed-Müller codes, with a few examples of this result.

  • 294.
    Abrahamsson, Olle
    Linköping University, Department of Electrical Engineering, Communication Systems.
    Hide and Seek in a Social Network2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In this thesis a known heuristic for decreasing a node's centrality scores while maintaining influence, called ROAM, is compared to a modified version specifically designed to decrease eigenvector centrality. The performances of these heuristics are also tested against the Shapley values of a cooperative game played over the considered network, where the game is such that influential nodes receive higher Shapley values. The modified heuristic performed at least as good as the original ROAM, and in some instances even better (especially when the terrorist network behind the World Trade Center attacks was considered). Both heuristics increased the influence score for a given targeted node when applied consecutively on the WTC network, and consequently the Shapley values increased as well. Therefore the Shapley value of the game considered in this thesis seems to be well suited for discovering individuals that are assumed to actively trying to evade social network analysis.

  • 295.
    Abrahamsson, Peder
    Linköping University, Department of Computer and Information Science.
    Mer lättläst: Påbyggnad av ett automatiskt omskrivningsverktyg till lätt svenska2011Independent thesis Basic level (degree of Bachelor), 12 credits / 18 HE creditsStudent thesis
    Abstract [sv]

    Det svenska språket ska finnas tillgängligt för alla som bor och verkar i Sverige. Därförär det viktigt att det finns lättlästa alternativ för dem som har svårighet att läsa svensktext. Detta arbete bygger vidare på att visa att det är möjligt att skapa ett automatisktomskrivningsprogram som gör texter mer lättlästa. Till grund för arbetet liggerCogFLUX som är ett verktyg för automatisk omskrivning till lätt svenska. CogFLUXinnehåller funktioner för att syntaktiskt skriva om texter till mer lättläst svenska.Omskrivningarna görs med hjälp av omskrivningsregler framtagna i ett tidigare projekt.I detta arbete implementeras ytterligare omskrivningsregler och även en ny modul förhantering av synonymer. Med dessa nya regler och modulen ska arbetet undersöka omdet är det är möjligt att skapa system som ger en mer lättläst text enligt etableradeläsbarhetsmått som LIX, OVIX och Nominalkvot. Omskrivningsreglerna ochsynonymhanteraren testas på tre olika texter med en total lägnd på ungefär hundra tusenord. Arbetet visar att det går att sänka både LIX-värdet och Nominalkvoten signifikantmed hjälp av omskrivningsregler och synonymhanterare. Arbetet visar även att det finnsfler saker kvar att göra för att framställa ett riktigt bra program för automatiskomskrivning till lätt svenska.

  • 296.
    Abrahamsson, Per
    Linköping University, Department of Electrical Engineering.
    Combined Platform for Boost Guidance and Attitude Control for Sounding Rockets2004Independent thesis Basic level (professional degree)Student thesis
    Abstract [en]

    This report handles the preliminary design of a control system that includes both attitude control and boost control functionality for sounding rockets. This is done to reduce the weight and volume for the control system.

    A sounding rocket is a small rocket compared to a satellite launcher. It is used to launch payloads into suborbital trajectories. The payload consists of scientific experiments, for example micro-gravity experiments and astronomic observations. The boost guidance system controls the sounding rocket during the launch phase. This is done to minimize the impact dispersion. The attitude control system controls the payload during the experiment phase.

    The system that is developed in this report is based on the DS19 boost guidance system from Saab Ericsson Space AB. The new system is designed by extending DS19 with software and hardware. The new system is therefore named DS19+. Hardware wise a study of the mechanical and electrical interfaces and also of the system budgets for gas, mass and power for the system are done to determine the feasibility for the combined system.

    Further a preliminary design of the control software is done. The design has been implemented as pseudo code in MATLAB for testing and simulations. A simulation model for the sounding rocket andits surroundings during the experiment phase has also been designed and implemented in MATLAB. The tests and simulations that have been performed show that the code is suitable for implementation in the real system.

  • 297.
    Abrahamsson, R.
    et al.
    Department of Electrical and Computer Engineering, University of Florida, USA.
    Larsson, Erik G.
    Department of Electrical and Computer Engineering, University of Florida, USA.
    Li, J.
    Department of Electrical and Computer Engineering, University of Florida, USA.
    Habersat, J.
    U.S. Army Night Vision and Electronic Sensor Directorate, Fort Belvoir, USA.
    Maksymonko, G.
    U.S. Army Night Vision and Electronic Sensor Directorate, Fort Belvoir, USA.
    Bradley, M.
    Planning Systems Inc., USA.
    Elimination of leakage and ground-bounce effects in ground-penetrating radar data2001In: Proceedings of the 11th IEEE Signal Processing Workshop on Statistical Signal Processing, 2001, 2001, p. 150-153Conference paper (Refereed)
    Abstract [en]

    We address the problem of removing specular ground surface reflections and leakage/cross-talk from downward looking stepped frequency ground-penetrating radar (GPR) data. A new model for the ground-bounce and the leakage/cross-talk is introduced. An algorithm that jointly estimates these effects from collected data is presented. The algorithm has the sound foundation of a nonlinear least squares (LS) fit to the presented model. The minimization is performed in a cyclic manner where one step is a linear LS minimization and the other step is a non-linear LS minimization where the optimum can efficiently be found using, e.g., the chirp-transform algorithm. The results after applying the algorithm to measured GPR data, collected at a US army test range, are also shown

  • 298.
    Abrahamsson, Robin
    et al.
    Linköping University, Department of Computer and Information Science, Software and Systems.
    Berntsen, David
    Linköping University, Department of Computer and Information Science, Software and Systems.
    Comparing modifiability of React Native and two native codebases2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Creating native mobile application on multiple platforms generate a lot of duplicate code. This thesis has evaluated if the code quality attribute modifiability improves when migrating to React Native. One Android and one iOS codebase existed for an application and a third codebase was developed with React Native. The measurements of the codebases were based on the SQMMA-model. The metrics for the model were collected with static analyzers created specifically for this project. The results created consists of graphs that show the modifiability for some specific components over time and graphs that show the stability of the platforms. These graphs show that when measuring code metrics on applications over time it is better to do this on a large codebase that has been developed for some time. When calculating a modifiability value the sum of the metrics and the average value of the metrics between files should be used and it is shown that the React Native platform seems to be more stable than native.

  • 299.
    Abrahamsson, Robin
    et al.
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Kovalev, Anton
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Lindell, Johan
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Lövhall, Jakob
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Nordfors, Per
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Rydström, Simon
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Stoltz, Robert
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Utveckling av energioptimeringsprogrammet Humble: erfarenheter från projekt i programvaruutveckling2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Den här rapporten behandlar ett kandidatarbete som utfördes mot Institutionen för ekonomisk och industriell utveckling. Arbetet gick ut på att modernisera det existerande programmet MODEST som använts för att beräkna optimala energisystem. Moderniseringen gjordes genom att skapa programmet Humble, vars funktionalitet bygger på MODEST.

    I den här rapporten beskrivs hur program kan utvecklas för att de ska vara enkla att använda, samt hur de kan konstrueras för att möjliggöra vidareutveckling. Dessa aspekter framställdes av kunden som viktiga i projektet.

    Gruppens tillvägagångssätt för att utveckla programmet förklaras och en överskådlig bild över den arkitektur som använts ges. De erfarenheter som gruppen förskaffat sig under projektet beskrivs och reflekteras över. Detta gäller såväl tekniska erfarenheter som erfarenheter kopplade till projektprocessen. Gruppmedlemmarnas personliga erfarenheter kopplade till de roller de haft i projektet beskrivs i individuellt skrivna delar.

    Slutligen diskuteras projektet och hur resultatet har uppnåtts, varefter slutsatser kopplade till frågeställningarna dras. Dessa slutsatser är att prototypning och användbarhetstester är effektiva metoder för att skapa program som är enkla att använda, samt att program som tillämpar tydligt dokumenterade designmönster och är modulärt uppbyggda möjliggör vidareutveckling.

  • 300.
    Abrahamsson, S.
    et al.
    SLU, Umeå, Sweden .
    Ahlinder, J.
    FOI, Umeå, Sweden .
    Waldmann, Patrik
    Linköping University, Department of Computer and Information Science, Statistics. Linköping University, The Institute of Technology.
    García-Gil, M. R.
    SLU, Umeå, Sweden .
    Maternal heterozygosity and progeny fitness association in an inbred Scots pine population2013In: Genetica, ISSN 0016-6707, E-ISSN 1573-6857, Vol. 141, no 1-3, p. 41-50Article in journal (Refereed)
    Abstract [en]

    Associations between heterozygosity and fitness traits have typically been investigated in populations characterized by low levels of inbreeding. We investigated the associations between standardized multilocus heterozygosity (stMLH) in mother trees (obtained from12 nuclear microsatellite markers) and five fitness traits measured in progenies from an inbred Scots pine population. The traits studied were proportion of sound seed, mean seed weight, germination rate, mean family height of one-year old seedlings under greenhouse conditions (GH) and mean family height of three-year old seedlings under field conditions (FH). The relatively high average inbreeding coefficient (F) in the population under study corresponds to a mixture of trees with different levels of co-ancestry, potentially resulting from a recent bottleneck. We used both frequentist and Bayesian methods of polynomial regression to investigate the presence of linear and non-linear relations between stMLH and each of the fitness traits. No significant associations were found for any of the traits except for GH, which displayed negative linear effect with stMLH. Negative HFC for GH could potentially be explained by the effect of heterosis caused by mating of two inbred mother trees (Lippman and Zamir 2006), or outbreeding depression at the most heterozygote trees and its negative impact on the fitness of the progeny, while their simultaneous action is also possible (Lynch. 1991). However,since this effect wasn’t detected for FH, we cannot either rule out that the greenhouse conditions introduce artificial effects that disappear under more realistic field conditions.

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