Syftet med detta projekt var att undersöka möjligheterna att externt mata in pulver i en PBF-maskin (en EBM-maskin, Electron Beam Melting), för att öka maskinens effektivitet. Huvudmålet med projektet var att designa ett sätt att leverera pulver till byggkammaren från en extern källa. Metoden som användes var produktutveckling från lektioner på universitetet, litteratur och några faser uppfanns specifikt för att hjälpa till med utvecklingen. Metoden delades upp i olika faser som hjälpte till att hålla en jämn takt under hela projektet. Vissa tester gjordes för att pröva om den nuvarande utrustningen kunde användas i konceptet. Resultaten visar att extern pulvermatning för EBM-maskiner har en öppning på marknaden, vilket innebär att inget företag har upptäckt ett sätt att externt mata pulver. Ytterligare resultat visade nuvarande brister och positiva delar av det nuvarande matningssystemet, men ännu viktigare vilka områden som kan förbättras och saker att tänka på när man utvecklar det nya konceptet. Testerna på ventilen visade att den kan ta "fullt" vakuum när den är ren, men mer utveckling måste göras för att välja den perfekta ventilen. Testet av tunnan visade att tunnan kunde stå emot visst vakuum och tätningen kunde förbli intakt. Men det behövs mer utveckling av tunnan för att få det att fungera. En målspecifikation gjordes och några koncept utvecklades. Efter det togs ett beslut om vilket koncept som gick framåt, det var det blå konceptet. Sedan gjordes några skisser och design i CAD för att visualisera hur konceptet såg ut. Syftet med projektet uppnåddes och huvudmålet uppfylldes. Ytterligare arbete och utveckling krävs för att göra detta koncept redo för prototypframställning och produktion. / The purpose of this project was to investigate the possibilities to externally feed powder into a PBF-machine (a EBM-machine, Electron Beam Melting) to increase the effectiveness of the machine. The main goal of the project was to design a way to deliver powder to the building-chamber from an external source. The method used was product development learnt from lessons at the university, literature and some phases were specifically invented to help with development. The method was split up into different phases that helped keep a steady pace during the whole project. Some tests were made to try if the current equipment could be used in the concept. The results show that external powder feed for EBM machines have an opening in the market, meaning that no company has jet discovered a way to externally feed powder. Further results showed the current flaws and positive parts of the current feeding system, but more importantly what areas that could be improved and things to consider when devel-oping the new concept. The tests on the valve showed that it can take “full” vacuum when clean, but more research must be done to choose the perfect valve. The barrel test showed that the barrel could withstand some vacuum and the sealing could remain intact. But more research on the barrel is needed. A target specification was made and some con-cepts were developed. After that a decision was made which concept was moving forward, it was the blue concept. Then some sketches and designs in CAD was made to visualize how the concept looked like. The purpose of the project was achieved and the main goal was met. Further work and development are needed to make this concept ready for prototyping and production. / <p>Betygsdatum 2023-06-28</p>

Additive tillverkning (AM) är en tillverkningsteknik som har använts i stor utsträckning i industrier de senaste åren. Electron beam melting (EBM) är en innovativ teknik för tillverkning inom ortopediska implantat- och flygindustrin för att EBM erbjuder hög produktivitet och lägre kostnad per del. Jämfört med traditionella tillverkningsmetoder kan EBM tillverka delar med betydande mekaniska egenskaper, men det finns några vanliga brister som hindrar EBMs förmåga att bli en vanligare bearbetningsmetod vid tillverkning. I detta arbete, som tar an formen av en State of the Art Rapport, introduceras EBM-metoden på teknisk nivå och jämförs med andra AM-metoder och konventionella tillverkningsmetoder. / Additive manufacturing (AM) is a manufacturing technology that has been widely used in industries in recent years. Electron beam melting (EBM) is an innovative technology for manufacturing of the orthopedic implant and aerospace industry because EBM offers high productivity and lower cost per part. Compared to traditional manufacturing methods, EBM can produce parts with significant mechanical properties, but there is some common shortcoming that prevent EBM's ability to become a more common processing method in manufacturing. This work, which takes the form of a State of the Art Report, introduces the EBM method at the technical level and compares with other AM methods and conventional manufacturing methods.

This thesis considers the contemporary work of the museum in the post-industrial setting of Glasgow. It interprets and understands how the museum as a space gives voice to New Labour’s concepts of social inclusion and citizenship whilst being embroiled in the wider process of urban regeneration and city enhancement. This research has been conducted using a mixed methodology incorporating policy analysis, participant observation and interviews, engaging with policy documentation, museum professionals and museum users in its goal to understand how the museum has been and is positioned within society. In exploring how museums have sought to become more socially inclusive, the research examined four different programmes in detail. These included two outreach projects; one working with adult learners and the other with different religious groups in the city. The research has also followed the contribution of a group of volunteers and finally it has engaged with the on-going processes surrounding the building of the city’s latest museum. The research findings have highlighted a complex and entangled set of power relations in the attempts to articulate social inclusion policy through the museum. This suggests, building upon the work of Foucault, that the museum embraces a soft-disciplinary power in relation to citizens. Specific programmes of the museum service targeting social inclusion reveal the benefits the individual may enjoy through participating in cultural events from which they might otherwise feel excluded. Yet, the reach of such programmes question the extent to which they are able to address social inclusion in the city. Recent developments – the production of the city’s newest museum as part of the riverside regeneration in particular – reveal how the installation of the iconic museum is closely allied to the wider project of urban economic regeneration. The planning of the Riverside Museum, however, has been attentive to the social inclusion agenda, particularly through the questions of access. Finally, the research shows how the city’s dominant growth agenda has resulted in a changing role for curators, shifting their agency away from a more traditional practice in which they were key gatekeepers, coordinating what museums displayed and how they did so, and towards a role that reflects a more scrutinised form of managerial control.

The subject of this study is Christian education in the church. This practical-theological work starts from the premise of the relevance of a commitment experience for the faith development of the individual and studies the formats and contents of continuing formal faith education of young Christians in evangelical free churches in a postmodern-urban milieu in Frankfurt. Its aim is to find out how well the New Testament discipleship topics of Jesus are integrated into the faith education in the church, and what reception difficulties and chances they experience in regard to the Zeitgeist. Are the New Testament discipleship topics still the basic guidelines with regard to content? The relationship between faith development, faith education and the local church is presented within a religion- and church-pedagogical approach and a connection to education for discipleship is made. The biblical premise is the discipleship commission of Jesus (Mt 28:18-20) and its church-pedagogical reply. / Der Untersuchungsgegenstand ist die christliche Erziehung in der Gemeinde. Diese praktisch-theologische Arbeit geht aus von der Bedeutung einer Commitment-Erfahrung für die Glaubensentwicklung des Einzelnen und untersucht die Formate und Inhalte der weiterführenden formalen Glaubenserziehung junger Christen in evangelikal-freikirchlichen Gemeinden im postmodern-urbanen Umfeld in Frankfurt. Ihr Ziel ist es, herauszufinden, inwiefern heute die neutestamentlichen Nachfolgethemen Jesu in der gemeindlichen Glaubenserziehung behandelt werden und welche Rezeptionsschwierigkeiten und Chancen sie im heutigen Zeitgeist haben. Sind dabei die neutestamentlichen Nachfolgethemen Jesu noch die inhaltlichen Grundrichtlinien? In einem religions- und gemeindepädagogischen Zugang wird die Beziehung von Glaubensentwicklung, Glaubenserziehung und der Ortsgemeinde gezeigt und mit der Erziehung zur Nachfolge verknüpft. Der biblische Ausgangspunkt ist der Jüngerschaftsauftrag Jesu (Mt 28,18-20) und dessen gemeindepädagogische Antwort. / Practical Theology / M. Th.(Practical Theology)

International Telemetering Conference Proceedings / October 26-29, 1998 / Town & Country Resort Hotel and Convention Center, San Diego, California / The telemetry and aerospace communities require communications equipment providing various modulation and demodulation formats. One format, with application in Space Ground Link Subsystems (SGLS), utilizes a Ternary (tri-tone) Frequency Shift-Keyed (FSK) signal Amplitude Modulated (AM) by a triangle waveform. Historically, SGLS equipment has operated with a fixed tri-tone frequency set (e.g., 65 kHz, 76 kHz and 95 kHz). The need for additional transmission channels and increased bandwidth efficiency creates the requirement for equipment with the flexibility to generate and receive varied and higher frequency tone sets. Combining analog and digital techniques, GDP Space Systems has developed the FDT001. It is an FSK/AM detector which recovers a bit rate clock at one of four selectable bit rates and reproduces ternary FSK modulation data over a widely tunable range of tone frequencies. The tuning range is expanded by using two methods of digital frequency discrimination. The following paper describes the design of the FDT001.

In product manufacturing, assembly approximately represents 50% of the total work hours. Therefore, an efficient and fast assembly system is crucial to get competitive advantages at the global market and have the right product quality. Today, the verification of the assembly system is mostly done by utilizing software based simulation tools even though limitations have been identified. The purpose of this thesis is to identify when the use of additive manufacturing technology could be used in assessing the feasibility of the assembly system design. The research questions were threefold. First, identifying limitations that are connected with the used assembly simulation tools. Secondly, to investigate when additive manufacturing can act as a complement to these assembly simulations. Finally, to develop a framework that will assist the decision makers when to use additive manufacturing as a complement to assembly simulations. The researchers used the method of case study combined with a literature review. The case study collected data from semi-structured interviews, which formed the major portion of the empirical findings. Observations in a final assembly line and the additive manufacturing workshop provided valuable insights into the complexity of assembly systems and additive manufacturing technologies. In addition, document studies of the used visualization software at the case company resulted in an enhanced understanding of the current setting. The case study findings validate the limitations with assembly simulations described in theory. The most frequent ones are related to visibility, positioning, forces needed for the assembly operator, and accessibility between different parts. As both theory and case study findings are consistent in this respect, simulation engineers should be conscious of when to find other methods than simulation for designing the assembly system. One such alternative method is the utilization of additive manufacturing. The thesis outlines a number of situations where additive manufacturing indeed could act as a complement to assembly simulation. The authors argue that the results and findings to a large degree are applicable to other industries as the automotive sector is very global and competitive in nature and encompasses a large variety of complex assembly operations. A structured framework was also developed that could act as a decision support. The framework takes into account three dimensions that are crucial for the decision; (1) the assembly simulation limitation, (2) the context of the assembly and which parts are involved and (3) the possible limitations of additive manufacturing in the specific context. This impartial decision framework could help companies with complex assembly systems to know when to use additive manufacturing, as well as for which parts and subparts additive manufacturing is applicable. To increase the longevity of the decision framework, new improvements of assembly simulation tools and additive manufacturing technologies, respectively, should be incorporated in the framework.

Kärnkraftsverkens materialgrupp söker nya alternativa material som är nötnings- och korrosionsbeständiga samt koboltfria. Ett möjligt alternativ är ett koboltfritt, martensitiskt, rostfritt stål av vilket komponenter tillverkas genom 3D-skrivning. Dokumenteringen av egenskaperna hos detta material är ännu inte komplett. I detta arbete har en sådan legering, benämnd VRF, analyserats. Korrosionstester utförda på legeringen före och efter värmebehandling visar att materialets korrosionsmotstånd minskat signifikant efter värmebehandlingen, dock påverkar inte materialets uppbyggnadsriktning korrosionsegenskaperna hos materialet, då både kort- och långsidan ger liknande resultat på korrosionsmätningarna. Analys av mikrostrukturen visar att en betydande volym av materialet utgörs av sekundära faser, såsom nitrider och karbider. Ingen stor skillnad i sammansättningen av, eller mängden av, sekundära faser kunde ses före och efter värmebehandling av legeringen. Materialets hårdhet mättes i olika områden av både det värmebehandlade och ej värmebehandlade materialet. I det ej värmebehandlade provet var hårdheten förhållandevis låg, men homogen genom hela provet. Hårdheten i det värmebehandlade provet var högre, men var inte homogen, utan varierade mycket i provet. Orsaken till variationen i hårdhet och de oväntat låga värdena tros vara en ej optimerad värmebehandlingsprocess. Då materialet har en relativt låg hårdhet och lågt korrosionsmotstånd är slutsatsen från detta arbete att materialet behöver genomgå en mer optimerad värmebehandlingsprocess innan det kan vara ett lämpligt alternativ inom kärnkraftsindustrin.

Denna studie undersöker hur unga transpersoner representeras i media, närmare bestämt inom genren reality tv. De två program som valts för ändamålet är amerikanska I am Jazz och ryska TransReality, där den första fokuserar på 15-åriga Jazz Jennings liv medan den andra följer ett antal unga transpersoners vardag. Valet av program bygger på att de båda släpptes under det gångna året, att samtliga huvudpersoner är ungdomar och att de har sitt ursprung i två vitt skilda kulturella kontext. Syftet är att granska hur serierna representerar transpersoner utifrån frågor som biologiskt kön, genus och könsidentitet. Frågeställningarna rör ungdomarnas sociala relationer och samhället, vad det är som serierna problematiserar och hur programmets utformning bidrar till att berätta deras historier. Inledningsvis förklaras olika definitioner av kön, samt genus och könsidentitet. För att närma mig materialet har jag valt teorier utifrån programmens utformning såväl som innehåll. Teorierna omfattar reality tv, stereotypier, Judith Butlers idéer om genus i kombination med transgender studier och transfeminism. De senare två är relativt nya akademiska ämnen/teorier i Sverige, men välbehövliga sådana då de tar transpersoners liv och erfarenheter på allvar. Studierna jag tagit del av inom tidigare forskning visar på att transpersoner ofta förbises även i queerteoretiska sammanhang. Feminismen har även inkorporerats i metodologin, för att bättre belysa det som studien avser att undersöka. Norman Faircloughs kritiska diskursanalys med sin politiska betoning utgör stommen för det analytiska arbetet. Detta har applicerats på tre avsnitt av varje program: det första, mittersta och sista. Genom att analysera dessa framkommer att bakom den överlag positiva framställningen av de unga transpersonerna i TransReality ligger konservativa värderingar om kön, genus och könsidentitet. I am Jazz är mer progressiv, men även den visar ibland på liknande tendenser som TransReality. De sociala relationerna är det som problematiseras, istället för de unga transpersonerna själva. Reality tv ger prov på att den vuxit till sig som genre i att den med dokumentär ambition berättar de unga transpersonernas historier. Denna autenticitet kan vara av vikt för samhällets förståelse av transpersoner.

International Telemetering Conference Proceedings / October 28-31, 1996 / Town and Country Hotel and Convention Center, San Diego, California / Aerospace Report No. TOR-0059(6110-01)-3, section 1.3.3 outlines the design and performance requirements of SGLS (Space Ground Link Subsystem) services. GDP Space Systems has developed a single card slot FSK (Frequency Shift Keying)/AM (Amplitude Modulation) demodulator. An application of this service is the US Air Force Satellite Command and Ranging System. The SGLS signal is tri-tone-FSK, amplitude modulated by a modified triangle wave at half the data rate. First generation FSK/AM demodulators had poor noise performance because the signal tones were filtered and processed at IF frequencies (65, 76 and 95 kHz). Second generation demodulators suffer from "threshold" due to non-linear devices in the signal path before the primary noise filtering. The GDP Space Systems demodulator uses a 0-Hz- IF topology and avoids both of these shortcomings. In this approach, the signal is first noncoherently down converted to baseband by linear devices, then it is filtered and processed. This paper will discuss the GDP 0-Hz-IF FSK/AM (SGLS) demodulator.

This art historiographical study focuses on African American artist Elizabeth Catlett’s linocut series I Am the Negro Woman, composed of fifteen images and executed in 1947 while Catlett was a visiting artist at the Taller de Graphica Popular in Mexico City. The series was exhibited shortly thereafter at the Barnett Aden Gallery in Washington, D.C., only to be largely marginalized by the art historical discourse of the following twenty-five years; however, during the Civil Rights Movement, a renewed interest in Catlett and her works began to develop. Later Feminist and Post-colonial art historians, seeking to widen the narrow mid-twentieth century canon, incrementally began to address these images in accordance with their respective interests, expanding the scholarship and increasing the exhibition of the series. The reputation of these images continues to grow, moving I Am the Negro Woman out of the margins of the art historical discourse into a more valued and recognized position.