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[pt] Compreender como analisar trincas é essencial para a indústria petroquímica evitar qualquer incidente de uma forma econômica. Normas de Integridade Estrutural fornecem procedimentos conservadores para avaliar componentes trincados como tubulações e vasos de pressão. Portanto, previsões de cargas criticas foram calculadas assumindo uma placa com trinca passante seguindo procedimentos dos níveis 2 e 3 da API 579. Para comparação, testes experimentais foram realizados para avaliar o conservatismo da norma em falha por rasgamento dúctil. Além disso, a tenacidade à fratura foi medida por meio do JIc e curva J-R. A técnica usada durante o processo de fratura foi o método de flexibilidade elástica com descarregamento e carregamentos sequenciais. Adicionalmente, efeito de geometria e tipo de carregamento, os quais possuem grande influência nas medições de tenacidade, também foram avaliados usando conceitos da mecânica da fratura elastoplástica. O material utilizado nesse trabalho foi o API 5L X80, que é um aço de Alta Resistencia e Baixa Liga (ARBL) bifásico desenvolvido para tubulações aplicáveis em aguas profundas. Os ensaios experimentais de medição de tenacidade usando corpos de prova SE(B), que possuem média-alta restrição plástica, foram testados seguindo procedimentos da ASTM E1820-17. Já os experimentos usando corpos de prova SE(T), que possuem baixa restrição plástica, foram realizados considerando procedimentos da literatura. / [en] Understanding how to analyze cracks is essential for the petrochemical industry to avoid accidents or incidents in a safe and economical way. Structural Integrity standards provide conservative procedures to assess the actual strength of cracked components like pipes and pressure vessels. Therefore, critical loads predictions were computed on a plate with a through-wall crack following level 2 and 3 of the fitness-for-service guide API 579. For comparison, experimental tests were performed to evaluate the standard conservatism on a ductile tearing type of failure. Furthermore, the fracture toughness of the steel was measured through standard JIc tests and material s resistance curves (J-R curve). The technique used during the fracturing process was the elastic compliance method with unloading/reloading sequences. Additionally, the effects of the specimen s geometry and the type of loading, which can significantly change the value of its toughness, were also analyzed using concepts of elastoplastic fracture mechanics. The material used in this work was the API 5L X80, which is a High Strength Low Alloy (HSLA) dual-phase steel developed for deepwater pipelines. The fracture toughness measurement tests using SE(B) specimens, which have a medium-to-high plastic constraint, followed the ASTM E1820-17 procedures. The experiments with SE(T) specimens, which present a low plastic restriction, considered literature procedures.

Immersion is a subject studied in various areas and especially in games, since a game that immerses a player, counts as a game of great value. Many studies have been performed to understand how to measure immersion through various forms of questionnaires, but how can one with the help of gamification and loud reading make reading more immersive? To see if gamification and loud reading can make reading more immersive an application is developed, the application provides a paragraph, and when read loud correctly creates sound and shows images. Then the application is tested by a group of people to see if gamification can be used to bring life to reading and further immerse the reader in the world of books.

I detta examensarbete utforskas vilka överförings- och betalningsmetoder ungavuxna föredrar av Swish, Klarna och Tink samt tekniska implementering gällandekodkomplexitet för dessa överförings- och betalningsmetoder. Detta är viktigt för attkunna erbjuda överförings- och betalningsmetoder som unga vuxna känner sigtrygga med och till att denna målgrupp fortsätter gå mot ett kontantfritt samhälle.Studien syftar till att fylla det forskningsgap som finns kring en direkt jämförelse avdessa betalningsmetoder.Forskningen visar att unga vuxna föredrar metoder som är användarvänliga och harett starkt varumärkesrykte. Forskningen visar också behovet av att vända sigspecifikt till unga vuxna då dessa saknar finansiell kunskap inom området.En prototyp utvecklades för att jämföra kodkomplexitet mellan de mest populärabetalningsmetoderna Swish, Klarna och Tink. Kodkomplexiteten förimplementeringen av dessa metoder mättes med Cyclomatic Complexity, ochresultaten visade att Swish, Klarna och Tink alla har en liknande implementering viaAPI-anrop i sin enklaste form, vilket innebär att valet mellan dem inte innebär någonskillnad i kodkomplexitet.Utifrån jämförandet av kodkomplexitet valdes en komplett prototyp att utvecklas föratt funktionstesta en implementetion av Tink, med hjälp av Quarkus för logik-delenkallad backend och SwiftUI för utseende-delen kallad frontend. SwiftUI valdes föratt skapa en dynamisk och användarvänlig gränssnittsupplevelse för Apple-enheter,medan Quarkus valdes för sin robusthet och effektivitet på server sidan.Prototypen funktionstestades och utvärderades av produktägaren Peak AMSecurities AB. Resultatet blev att prototypens kodbas kan användas i framtidaproduktionssättning.Denna studie bidrar till insikt om unga vuxnas preferenser för digitalabetalningsmetoder och erbjuder en teknisk grund för vidare forskning inomområdet. Genom att jämföra Swish, Klarna och Tink ger arbetet viktiga insikter somkan hjälpa utvecklare att skapa bättre finansiella verktyg som möter användarnasbehov och förväntningar. / This thesis explores which transfer methods young adults prefer among Swish,Klarna, and Tink, as well as the technical implementation concerning code com-plexity for these transfer and payment methods. This is important to offer transferand payment methods that young adults feel comfortable with and to ensure thistarget group continues to move towards a cashless society. The study aims to fill theresearch gap regarding a direct comparison of these payment methods.Research shows that young adults prefer methods that are user-friendly and have astrong brand reputation. The research also highlights the need to specifically ad-dress young adults as they lack financial knowledge in the area.A prototype was developed to compare code complexity with the most popular pay-ment methods Swish, Klarna, and Tink. The code complexity for the implementa-tion of these methods was measured using Cyclomatic Complexity, and the resultsshowed that Swish, Klarna, and Tink all have similar implementations via API callsin their simplest form, which means they do not increase code complexity for devel-opers.Based on the comparison of code complexity, a complete prototype was chosen tobe developed for functional testing, implemented with Tink, using Quarkus for thebackend logic and SwiftUI for the frontend interface. SwiftUI was chosen to createa dynamic and user-friendly interface experience for Apple devices, while Quarkuswas chosen for its robustness and efficiency in server-side processing.The prototype was functionally tested and evaluated by the product owner Peak AMSecurities AB. The result was that the prototype's codebase can be used in futureproduction deployment.This study contributes to the understanding of young adults' preferences for digitalpayment methods and provides a technical foundation for further research in thearea. By comparing Swish, Klarna, and Tink, the work offers important insightsthat can help developers create better financial tools that meet users' needs and ex-pectations.

Vibrations caused due to aerodynamic excitation may cause severe limitation to the performance of turbomachines. The force resulting from the non-uniform pressure distribution within the labyrinth cavity is identified as a major source of this excitation. In order to perform rotor dynamic evaluation of rotor-bearing-seal system, accurate prediction of this force is essential. A visual basic based front-end, for a labyrinth seal analysis program, has been designed herein. In order to accurately predict the excitation force, proper modeling of labyrinth leak path is important. Thus, the front-end developed herein incorporates a leak-path geometric diagram for visual analysis of labyrinth leak path and tooth location. Furthermore, to investigate influence of various operating conditions and gas properties on excitation force (effective cross-coupling stiffness), a parametric study is performed on both the eye seal and the balance piston labyrinth seal. / Master of Science

Developing applications for distributed adaptive computing systems (ACS) requires developers to have knowledge of both parallel computing and configurable computing. Furthermore, portability and scalability are required for developers to use innovative ACS research directly in deployed systems. This thesis presents an Application Programming Interface (API) implementation developed in a scalable parallel ACS system. The API gives the developer the ability to easily control both single board and multi-board systems in a network cluster environment. The API implementation is highly portable and scalable, allowing ACS researchers to easily move from a research system to a deployed system. The thesis details the design and implementation of the API, as well as analyzes its performance. / Master of Science

According to research, software security vulnerabilities most often stem from memory related issues. These memory issues are mitigated in many programming languages, but often at the cost of performance. Rust, however, is a programming language which addresses these memory issues without significant losses in performance. Leveraging this strength, an Application Programming Interface (API) for interacting with Mimer SQL databases was developed in Rust. As there is no standard for writing database APIs in Rust, inspiration was drawn from other Rust APIs for relational database management systems to ensure similar functionality. The development process involved three main steps: stakeholder requirement specification, system design and implementation, and testing and evaluation. Stakeholder requirements were identified collaboratively to ensure alignment between user needs and API functionality. The system design consists of two libraries: the “FFI Library”, facilitating interaction with the Mimer SQL C API, and the “API library”, providing a user-friendly interface for Rust developers. Key features include connection management, statement preparation, cursor handling, and transaction support. Testing methodologies include unit and integration testing, performance benchmarking against the C API, and consideration for memory safety. The resulting API demonstrates performance parity with the C API and adherence to Rust conventions. / Enligt forskning beror säkerhetsbrister i programvara oftast på minnesrelaterade problem. Dessa minnesproblem motverkas i många programmeringsspråk, men ofta på bekostnad av prestanda. Rust är dock ett programmeringsspråk som åtgärdar dessa minnesproblem utan betydande prestandaförluster. Genom att utnyttja denna styrka utvecklades ett applikationsprogrammeringsgränssnitt (API) för att interagera med Mimer SQL-databaser i Rust. Eftersom det inte finns någon standard för att skriva databas-API:er i Rust hämtades inspiration från andra Rust-API:er för relationsdatabaser för att säkerställa liknande funktionalitet. Utvecklingsprocessen innefattade tre huvudsteg: specifikation av intressentkrav, systemdesign och implementering samt testning och utvärdering. Intressentkraven identifierades genom samarbete för att säkerställa överensstämmelse mellan användarbehov och API-funktionalitet. Systemdesignen består av två bibliotek: “FFI-biblioteket”, som erbjuder interaktionen med Mimer SQL C API:t, och “API-biblioteket”, som erbjuder ett användarvänligt gränssnitt för Rust-utvecklare. Nyckelfunktioner inkluderar anslutningshantering, validering av SQL-satser, iterering över resultatset och transaktionsstöd. Testmetoderna omfattar enhets- och integrationstester, prestandajämförelser med C API:t och testning av minnessäkerhet. Det resulterande API:t visar prestandaparitet med C API:t och följer konventioner i Rust.

13548805670613-46162052c208770f99e83a586780d16c.txt As the technologies for the realisation of the idea of the Semantic Web have evolved rapidly during past few years, it is possible to use them in variety of applications. As they are designed with the ability to process and analyze semantic information found in the data in mind, they are particularly suitable for the task of enhancing relevance of the document retrieval. In this work, we discuss the possibilities of identifying a suitable subset of the expressing capabilities of the SPARQL querying language and create a component that encapsulates the technical details of its usage. Page 1

Esta Dissertação abrange a caracterização microestrutural do aço API 5L X65 soldado por feixe de elétrons (EBW) com cinco diferentes aportes térmicos e sem o uso de metal de adição. O aço API 5L X65 pertence à classe de aços ARBL e é empregado na fabricação de oleodutos e gasodutos. As três regiões da solda metal-base (MB), zona termicamente afetada (ZTA) e zona fundida (ZF) foram caracterizadas por microscopia ótica (MO), microscopia eletrônica de varredura (MEV), difração de raios X e medidas de microdureza Vickers. As microestruturas encontradas nestas três regiões são bastante distintas. O MB apresenta grãos ferríticos com bandas perlíticas orientadas paralelamente à direção de laminação. Devido à elevada densidade de potência do processo EBW e às elevadas velocidades de soldagem utilizadas, a ZTA é bastante estreita sendo formada por grãos ferríticos finos e bandas perlíticas degeneradas que a diferem do MB. Na interface ZTA/ZF foi possível observar a presença de grãos com morfologia acicular com a presença dos constituintes M-A (martensita-austenita). A ZF apresentou morfologia similar à encontrada em aços microligados soldados: ferrita alotriomórfica, ferrita acicular, ferrita de Widmanstätten, constituintes M-A, além de regiões bainíticas. Na parte central da chapa foi observada a segregação de manganês. A técnica EBW permite a soldagem de tubos com paredes espessas com apenas um passe. Os resultados desta Dissertação são úteis para avaliar a viabilidade técnica do uso de EBW na fabricação de tubos para o transporte de óleo e gás, especialmente em aços mais resistentes (bainíticos). / This Dissertation aims at the microstructural characterization of electron-beam welded (EBW) API 5L X65 steel using five different processing conditions (heat input) and without filler metal addition. The API 5L X65 steel is a high-strength low-alloy (HSLA) steel employed mainly in the manufacture of pipelines for oil and gas. The three regions of the welds, namely the base metal (BM), heat affected zone (HAZ) and fusion zone (FZ) were characterized by light optical microscopy using different chemical etching agents, scanning electron microscopy, X-ray diffraction and Vickers microhardness testing. The microstructures found in the three regions were quite distinct. The BM consists of elongated ferritic grains with pearlite bands oriented along the rolling direction. Due to the high power density provided by EBW, the HAZ is very narrow and consists of ferritic grains and bands of degenerated pearlite. At the HAZ/FZ interface it is possible to observe the presence of grains with acicular morphology and the presence of M-A (martensite- retained austenite) constituents. The FZ showed a morphology similar to that one found in molten microalloyed steels consisting of allotriomorphic ferrite, acicular ferrite, Widmanstätten-like ferrite, M-A constituents, as well as bainite. In the central part of the plate it was observed the presence of Mn-segregation lines along the BM. The electron beam welding was chosen because it produces a relatively small HAZ and it allows the welding of thick-wall tubes in one single pass. The results of this work are useful to evaluate the possibility of using EBW in the manufacture of pipelines for transport of oil and gas, especially in higher grade steels.