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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

Israels sjötaktiska agerande

Mellevik, Lina January 2009 (has links)
Yom Kippurkriget 1973 kan sägas vara det första sjökriget då sjömålsrobotar nyttjades av krigets respektive parter. Hur påverkade denna teknikutveckling av sjömålsroboten Israels sjötaktiska agerande? Syftet med uppsatsen är att undersöka hur teknikutvecklingen av sjömålsroboten har påverkat Israels sjökrigföring, samt undersöka huruvida det är tekniken som styr taktiken, eller tvärtom. Detta sker med en komparation av israelernas sjökrigföring under två krig, sexdagarskriget 1967 samt Yom Kippurkriget 1973. Analysverktyg för denna jämförelse utgörs av Wayne P. Hughes och Christopher Werners teorier angående samspelet mellan teknik och taktik. Denna teori och empiri redogörs deskriptivt med kvalitativ textanalys. Jämförelsen leder fram till att israelernas sjötaktiska agerande förändrades. I bägge krigen rådde god teknisk analys vilket påverkade deras taktik. Tekniken under Yom Kippurkriget möjliggjorde dock en offensivare taktik än agerandet under sexdagarskriget. Teknikutvecklingen av sjömålsroboten ledde således fram till en effektiv taktikanpassning. Undersökningen leder även fram till att teknik och taktik ständigt påverkar varandra. / The Yom Kippur War in 1973 is known to be the first naval war when surface-to-surface missiles were used by both sides. How did this development of technology affect the tactical actions of Israel? This paper examines how the development of technology, in form of the surface-to-surface missile, has affected the naval warfare of Israel and if technology affects tactics or vice versa. To find answers, the Israelis tactical actions are compared, in two wars, Six-Day War in 1967 and Yom Kippur war in 1973. Theories regarding the interplay between technology and tactics, by Kevin P. Hughes and Christopher Werner, are used as tool for the analysis. The result of the study shows that the tactical actions of Israel did change by the development of technology. Common in both wars is the fact that analyses of technology were carried out and affected their tactical actions. Technology during the Yom Kippur War though made more offensive tactics possible, than during the Six-Day War. Thus development of the surface-to-surface missile did lead to an effective adaptation of tactics. The result of the study also shows that tactics and technology constantly affects each other.
32

Kommersialisering av medicinteknik sprungen ur grundforskning : En studie av SciBase AB:s utveckling av diagnosverktyget elektronisk biopsi - för tidig upptäckt av malignt melanom

Thuresson, David, Oscar, Malmqvist January 2009 (has links)
Sverige är ett framstående land inom medicinteknik, och har genom åren producerat flera viktiga innovationer, såsom pacemakern, ultraljud och kuvösen, vilka bidragit till bättre och effektivare vård. Många av idéerna till dessa innovationer har sitt ursprung inom grundforskning, medan utveckling och kommersialisering sker inom industrin. Syftet med uppsatsen är att studera och analysera vilka problem som kan föreligga då teknik utvecklad i ett forskningssammanhang vidareutvecklats och kommersialiseras i en affärskontext. Studien bygger på en kvalitativ fallstudie av hur teknikutvecklingen fortskridit mot kommersialisering inom det medicintekniska företaget SciBase AB, som utvecklat en produkt och metod för diagnostik av hudcancern malignt melanom. Analysen har genomförts utifrån ett sociotekniskt perspektiv, och bygger på teorier hämtade från STS- och IMP-fältet. Studien bekräftar svårigheten att inpassa något nytt i ett befintligt affärssammanhang, och hur befintliga relationer och regulatorer har en avgörande inverkan på vad som utvecklas till en innovation. Vidare visas att teknik påverkas av det sammanhang i vilken den utvecklas, vilket senare påverkar möjligheten att inbädda tekniken i en affärskontext.
33

Leda digitaliseringen i skolan : Om att navigera i en föränderlig värld

Olsson, Gunillahelen January 2021 (has links)
The school leader task is complex and has since 2017 been expanded with the task of leadingthe digitization in school. The purpose of this study is to make visible and problematize thechallenges school leaders face in their mission to lead digitization in schools. Through focusgroup interviews where school leaders at upper secondary school level talked about the workat their own school and their own role in the work of leading the digitization, challenges havebeen identified. These are set in relation to theory of how successful (distributed) managementof digitization ought to take place and in relation to the National Agency for Education'sexpectations of school leaders in the task of leading the digitization.The results show that an already complex assignment has become even more challenging. Thedigitization assignment affects almost all areas of the school's activities and, as a result, theschool leaders express difficulties in formulating clear goals with the digitization. They alsodescribe limitations in the conditions, both in terms of teachers' time but also personnelresources in the form of IT educators or development leaders and support. Technology is alsoa challenge because development is progressing so fast. In parallel with the internal activities,there is a debate about the effects of digitization on the individual and the learning that schoolleaders need to relate to.The challenges are many and it is important to continue the discussion about how school leaderscan be supported in their mission to lead digitization in schools.
34

“Grooming - ett av vår tids växande samhällsproblem.” : En kvalitativ studie om konsekvenserna av grooming / “Grooming - A Rising Societal Issue of Our Time.” : A Qualitative Study on the Consequences of Grooming

Zetterberg, Hanna, Källmark, Charlotte January 2023 (has links)
Syftet med studien är att skapa förståelse kring uppkomsten av och vilka konsekvenser grooming innebär för utsatta flickor och som de bär med sig in i vuxenlivet, samt vilka åtgärder som samhället bör ta för att minska riskerna för grooming.Studien bygger på åtta kvalitativa intervjuer med flickor som varit utsatta för grooming under sin barndom. Resultatet visar att flickorna som vuxna lider av psykisk ohälsa och tillitsproblem efter att ha blivit utsatta för grooming och att det påverkar deras sätt att leva. Att vår tids tekniska utveckling möjliggjort att grooming sker blir tydligt genom studien och därför bör åtgärderna för att minska problematiken främst fokusera på denna del.I analysen används Becks teori om risksamhället för att förstå det stora perspektivet av vårt nutida samhälle och hur det fungerar med de risker som samhället utsätter unga för. För att förstå individens sociala värld utgår vi från Scheff och Connells teorier för att förstå känslovärlden och männens makt över dessa flickor. / The purpose of this study is to gain understanding around the emergence and consequences of grooming for the affected girls and how it carries into their adulthood, as well as the measures that society should take to reduce the risks of grooming.The study is based on eight qualitative interviews with girls who have been subjected to grooming during their childhood. The results show that as adults, these girls suffer from mental health issues and trust issues as a result of being exposed to grooming, affecting their way of life. The fact that technological advancements of our time have enabled grooming to occur is evident through this study, and therefore, measures to reduce the problem should primarily focus on this aspect.In the analysis, Beck's theory of the risk society is used to understand the broader perspective of our contemporary society and how it operates with the risks that society exposes young people to. To understand the individual's social world, we use theories from Scheff and Connell to comprehend the emotional world and men's power over these girls.
35

Styrd Fragmentering i Metalliska Stridsdelar : Teknikutveckling av fragmenterande stridsdelar / Controlled Fragmentation of Metallic Warheads : Technology development of Fragmenting Warheads

Persson, William, Rehnberg, Lukas January 2022 (has links)
Fragmenterande stridsdelar har funnits länge och idag finns tre huvudsakliga metoder för att uppnå fragmentering i en stridsdel. Metoden styrd fragmentering som undersöks i arbetet fungerar generellt sett bra men saknar önskad kontrollförmåga. Målet med arbetet var att utveckla koncept av styrt fragmenterande stridsdelar och undersöka om fragmentspridningen kan riktas och snävas in till mindre än ±20° enligt två fall, cirkelskiva och cirkelsektor. De framtagna koncepten önskades vara tillverkningsbara med additiv tillverkning och lämpligheten för detta skulle därför undersökas. I samband med detta önskades även ett materialval. Examensarbetet genomfördes i samarbete med uppdragsgivaren Saab Dynamics AB och Karlstads universitet. Arbetet följde en teknikutvecklingsprocess innefattande en förstudie där vetenskaplig litteratur studerades och kontakt etablerades med tillverkare samt områdesexperter för att undersöka möjligheterna. Följande förstudien genomfördes en konceptutvecklingsprocess där de 3D-modellerade konceptens funktion undersöktes och verifierades med SPH-simuleringar i IMPETUS Afea. Ett materialval gjordes utifrån tillverkarens tillgängliga material samt önskvärda materialegenskaper och konceptens tillverkningsbarhet undersöktes. De slutsatser som kan dras utifrån teknikutvecklingen är att det med styrd fragmentering är möjligt att rikta en stridsdels fragment till önskade spridningsfall, dock med förbättringsmöjligheter med avseende på bland annat fragmentens massfördelning. Koncepten som framställdes visades vara lämpliga att tillverka med additiv tillverkning då de framtagna geometriernas komplexitet gynnas av de ökade frihetsgraderna samt då det valda materialet tillät en godtagbar fragmentering och var tillverkningsbart med AM. Prototyper tillverkades i plast men verkliga tester genomfördes ej. Verkliga tester och vidare optimering av tekniken lämnades som framtida arbete. / Fragmentation warheads have been used for a long time and today there are three main methods of achieving fragmentation in a warhead. The method studied in this work is controlled fragmentation, a method that generally works adequately but can only control the fragmentation to a certain degree. The goal of this project was to develop multiple concepts of controlled fragmentation warheads and investigate whether it is possible to aim and reduce the projection angle of the fragments to ±20° for two cases, circular disc and circle sector. It was wished for the developed concepts to be manufacturable with additive manufacturing, its feasibility to be studied and therefore a material selection with this in mind to be done. The thesis work has been carried out in collaboration with Saab Dynamics AB and Karlstad University. A technology development process was used consisting of a literature study where scientific literature was studied and contact was established with the manufacturer as well as other experts in the field of study in order to examine the possibilities regarding the project. Following the literature study, a concept development process was carried through where the function of the 3D-modeled concepts were examined and verified through SPH-simulations in IMPETUS Afea. A material selection was done with regards to the manufacturers available materials and the sought after material properties. Finally, the concepts manufacturability was examined and verified. The conclusions drawn from this technology development are the following: It is possible to both reduce the projection angle and aim the resulting fragments to the specified cases, although with great room for improvement regarding, among other things, the fragment mass distribution. The presented concepts proved to be suitable for additive manufacturing, because of their geometric complexity where the increased design freedom of AM is greatly benefited. The chosen material also proved suitable for both AM and use in fragmenting warheads. Plastic prototypes were made but real experimental tests were not conducted. Real experiments and further optimization of the technology were left as future work.
36

Samspel mellan miljöpolitik, innovation och teknikutveckling : Fallstudier om svenska avlopp, kylskåp och bilar / Interdependance between environmental policy, innovation and technological development : Case studies on Swedish wastewater treatment, refrigerators and cars

Wallentin, Sam January 2013 (has links)
Within process or manufacturing industries, the production of goods and services or the products themselves may have negative side effects such as pollution. An important task for environmental policy is to control and limit these pollutions, for example via regulatory measures. Although, the efficiency of such measures vary greatly between different industries and an increasingly important task for environmental policy is then to encourage companies to engage in environmentally motivated innovation. Governments can utilize other measures than regulation to indirectly decrease pollution. This thesis aims to analyze such activities and how it affects the innovativeness of wastewater treatment, refrigeration and automobile manufacturing industries. The aim is also to investigate how environmental policy is shaped by opinion, technology and relationships within and to an industry. In each of the cases, the current technical system was a major determinator for what could be accomplished in an industry. This was more or less dependent on foreign conditions, such as market, opinion and policy, but the domestic level of technical advancement was critical. The geographical breadth of the issue at hand was a major factor. Also, all three cases showed that each industry has, for good or bad, dominating players that either dictates or largely influences the pace of adoption of environmentally motivated innovation. Government agencies must understand these facts, inventively use the array of policy tools at hand and include both industry representatives and foreign piers to speed up environmentally motivated innovation.
37

Revision of an artificial neural network enabling industrial sorting

Malmgren, Henrik January 2019 (has links)
Convolutional artificial neural networks can be applied for image-based object classification to inform automated actions, such as handling of objects on a production line. The present thesis describes theoretical background for creating a classifier and explores the effects of introducing a set of relatively recent techniques to an existing ensemble of classifiers in use for an industrial sorting system.The findings indicate that it's important to use spatial variety dropout regularization for high resolution image inputs, and use an optimizer configuration with good convergence properties. The findings also demonstrate examples of ensemble classifiers being effectively consolidated into unified models using the distillation technique. An analogue arrangement with optimization against multiple output targets, incorporating additional information, showed accuracy gains comparable to ensembling. For use of the classifier on test data with statistics different than those of the dataset, results indicate that augmentation of the input data during classifier creation helps performance, but would, in the current case, likely need to be guided by information about the distribution shift to have sufficiently positive impact to enable a practical application. I suggest, for future development, updated architectures, automated hyperparameter search and leveraging the bountiful unlabeled data potentially available from production lines.

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