ECDL CAD testų administravimo sąsajos tyrimas. / Research of ECDL CAD Test Administration Interface.

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ProSharp AB tillverkar och säljer automatiserade slipmaskiner för skridskoskenor. Slipmaskinerna är uppbyggda av ett antal komponenter, bland annat en infästningsanordning som studerats närmare i projektet. Infästningens uppgift är att låsa fast skridskoskenan i ett rätvinkligt läge för att möjliggöra en jämn och rak slipning. Denna infästning är anpassad för att låsa fast skenor som har en plan sidoyta men det börjar komma skenor som har mer komplexa sidoytor, exempelvis konkava. Problemet när dessa skenor skall fästas är att det skapas en fästpunkt istället för en fästyta mellan skenan och infästningen vilket medför att skenan går att vicka på i sidled. Syftet med arbetet är att undersöka möjligheten för att skapa en infästning som kan låsa fast dessa skenor utan att detta problem uppstår. Designprocessen är den metod som legat till grund för projektet och en slutgiltig CAD-konstruktion togs fram i 3D-modelleringsprogrammet Solidworks. Den kraft som behövdes för att räta upp skenan bestämdes samt om det med hjälp av enbart handstyrka går att vrida en knapp tills denna kraft uppstår mellan två klämblock. Det resultatet som erhölls var att det krävs minst 20 N för att räta upp skenan och att det utan svårigheter gick att uppnå denna kraft med enbart handstyrka. Utifrån dessa resultat kunde kraftsimuleringar i programmet Solidworks göras där resultaten visade hur stor utböjning klämblocket hade vid den framtagna lasten. Detta resultat kunde sedan analyseras för att utesluta självlåsning. En prototyp togs sedan fram och testades, resultatet visar att vidare utveckling krävs för att konstruera en väl fungerande infästning. Ett ändringsförslag för prototypen togs fram där de analyserade problemen har lösts genom konstruktionsändringar. Projektet har visat att det är möjligt att skapa en tilläggsmodul som löser problemet med glappande skena. / <p>Betygsdatam: 2016-06-21</p>

Mathematics, physics, biology, and computer science are combined to create computational modeling, which studies the behaviors and reactions of complex biomedical problems. Modern biomedical research relies significantly on realistic computational human models or “virtual humans�. Relevant study areas utilizing computational human models include electromagnetics, solid mechanics, fluid dynamics, optics, ultrasound propagation, thermal propagation, and automotive safety research. These and other applications provide ample justification for the realization of the Visible Human Project® (VHP)-Female v. 4.0, a new platform-independent full body electromagnetic computational model. Along with the VHP-Female v. 4.0, a realistic and anatomically justified Dynamic Breathing Sequence is developed. The creation of such model is essential to the development of biomedical devices and procedures that are affected by the dynamics of human breathing, such as Magnetic Resonance Imaging and the calculation of Specific Absorption Rate. The model can be used in numerous application, including Breath-Detection Radar for human search and rescue.

OBJECTIVES: To evaluate the marginal chipping of anterior veneers made with CAD/CAM by calculating the chipping factor, to evaluate the failure load of different veneering materials and thicknesses under static loading and cyclic loading. MATERIALS AND METHODS: An ivorine central incisor was prepared to receive a traditional veneer. Using epoxy resin, 120 replication dies were made of the prepared tooth. Four ceramic materials were used; IPS Empress CAD, IPS e.max CAD, VITA ENAMIC and Lava Ultimate. Veneers were milled using a Sirona InLab MCXL at three different thicknesses, 0.4mm, 0.7mm and 1.0mm, n=10 for each group. Veneers were inspected under the light microscope to calculate the chipping factor (CF). All veneers were cemented to their tooth replicas using Variolink Veneer resin cement. Five specimens/group were loaded under compression using an Instron universal testing machine at a rate of 0.5 mm/minute until fracture. Another five specimens were subjected to cyclic loading at 30% of the mean fracture load for 30,000 cycles at frequency rate of 1 Hz, and then were loaded under compression to fracture. Modes of failure were recorded after each test. RESULTS: IPS Empress CAD 0.4mm CF was higher than all other groups, and VITA ENAMIC and Lava Ultimate 1.0mm CF were the lowest. There was a significant difference in the failure load of the IPS Empress CAD and IPS e.max CAD groups under static loading but not in VITA EANMIC and Lava Ultimate groups. Cyclic fatigue had no significant effect on the failure load of different veneering materials and thicknesses. CONCLUSIONS: Chipping factor decreases as the material thickness increases and can be used as an indicator of material machinability. IPS e.max CAD at 1.0mm had the highest static failure load value when compared to other materials. Cyclic fatigue did not affect the failure load values within the groups tested. / 2019-09-26T00:00:00Z

The report illustrates about the digital tools those are used for product development and organizational management (apparel sector). We went to Lectra Sweden AB, DTS solutions AB to search our planned information about those tools. We got some additional information from them as well. We were interested to learn about much software for this but we studied about Lectra Fashion PLM, PISA PDM, and ERP Garp system (CRM, SRM, MRM) as we could manage opportunity to know about them only.For Lectra, we focused on general idea about this software, its different divisions, its working procedure, its advantage to use, its possibility to use for every company. On the other hand, we concentrated on almost similar way of Lectra for PDM, PLM, ERP (CRM, SRM, and MRM).We got different divisions of Lectra, namely- Kaledo, Modaris, Diamino, Optiplan are using for various purposes, like - design, pattern making, marker making, spreading and cutting. On the opposite side of the coin, if companies implement PDM, PLM and ERP system, they can assist to manage the whole business chain very easily for instance- product development, order, purchase, manufacturing, stock/distribution, economy, logistics etcetera. We also knew that it is expensive to buy those software’s and require special skill to operate so it is not prolific to all company. / Program: Magisterutbildning i Applied Textile Management

Este trabalho faz uma análise ampla sobre os algoritmos de posicionamento. Diversos são extraídos da literatura e de publicações recentes de posicionamento. Eles foram implementados para uma comparação mais precisa. Novos métodos são propostos, com resultados promissores. A maior parte dos algoritmos, ao contrário do que costuma encontrar-se na literatura, é explicada com detalhes de implementação, de forma que não fiquem questões em aberto. Isto só possível pela forte base de implementação por trás deste texto. O algorítmo de Fidduccia Mateyeses, por exemplo, é um algorítmo complexo e por isto foi explicado com detalhes de implementação. Assim como uma revisão de técnicas conhecidas e publicadas, este trabalho oferece algumas inovações no fluxo de posicionamento. Propõe-se um novo algorítimo para posicionamento inicial, bem como uma variação inédita do Cluster Growth que mostrta ótimos resultados. É apresentada uma série de evoluções ao algorítmo de Simulated Annealling: cálculo automático de temperatura inicial, funções de perturbação gulosas (direcionadas a força), combinação de funções de perturbação atingindo melhores resultados (em torno de 20%), otimização no cálculo de tamanho dos fios (avaliação das redes modificadas e aproveitamento de cálculos anteriores, com ganhos em torno de 45%). Todas estas modificações propiciam uma maior velocidade e convergência do método de Simulated Annealling. É mostrado que os algorítmos construtivos (incluindo o posicionador do Tropic, baseado em quadratura com Terminal Propagation) apresentam um resultado pior que o Simulated Annealling em termos de qualidade de posicionamento às custas de um longo tempo de CPD. Porém, o uso de técnicas propostas neste trabalho, em conjunto com outras técnicas propostas em outros trabalhos (como o trabalho de Lixin Su) podem acelerar o SA, de forma que a relação qualidade/tempo aumente.

This research presents a new method for integrating client server architectures that are used for the development of Massive Online Role Playing Games (MMORPG) into multi-user engineering software tools. The new method creates a new architecture named CAx Connect by changing the client-pull-server communication pipeline to a server-push-client communication pipeline, effectively reducing the amount of bandwidth consumed and allowing these tools to utilize multiple server processors for complex calculations. This method was used on the new NX Connect multi-user CAx prototype developed at BYU. The new method provides a road map to further implement this architecture and its services into additional multi-user CAx tools. To demonstrate the effectiveness of this technology, a prototype architecture was built to provide a front end service, a message relay service, and a database insertion service, which were integrated into the current architecture. The front end service provides load balancing of clients, while the feature administration service passes messages throughout the architecture. The database insertion service inserts features passed from the NX Connect client into the database. The results show that this architecture is more efficient and that a scalable architecture was created, successfully demonstrating the integration of this architecture with multi-user CAx tools.

Due to the multiplicity of computer-aided engineering applications present in industry today, interoperability between programs has become increasingly important. A survey conducted among top engineering companies found that 82% of respondents reported using 3 or more CAD formats during the design process. A 1999 study by the National Institute for Standards and Technology (NIST) estimated that inadequate interoperability between the OEM and its suppliers cost the US automotive industry over $1 billion per year, with the majority spent fixing data after translations. The Neutral Parametric Canonical Form (NPCF) prototype standard developed by the NSF Center for e-Design, BYU Site offers a solution to the translation problem by storing feature data in a CAD-neutral format to offer higher-fidelity parametric transfer between CAD systems. This research has focused on expanding the definitions of the NPCF to enforce data integrity and to support associativity between features to preserved design intent through the neutralization process. The NPCF data structure schema was defined to support associativity while maintaining data integrity. Neutral definitions of new features was added including multiple types of coordinate systems, planes and axes. Previously defined neutral features were expanded to support new functionality and the software architecture was redefined to support new CAD systems. Complex models have successfully been created and exchanged by multiple people in real-time to validated the approach of preserving associativity and support for a new CAD system, PTC Creo, was added.

Tese de mestrado integrado. Engenharia Metalúrgica e de Materiais. Faculdade de Engenharia. Universidade do Porto. 2010