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The geometric dimensioning and tolerancing concept of coaxiality is often required by design engineers for balance of rotating parts and precision mating parts. In current practice, it is difficult for manufacturers to measure coaxiality quickly and inexpensively. This study examines feasibility of a manually-operated, mechanical device combined with formulae to indicate coaxiality of a test specimen. The author designs, fabricates, and tests the system for measuring coaxiality of holes machined in a steel test piece. Gage Repeatability and Reproducibility (gage R&R) and univariate analysis of variance is performed in accordance with Measurement System Analysis published by AIAG. Results indicate significant design flaws exist in the current configuration of the device; observed values vary greatly with operator technique. Suggestions for device improvements conclude the research.

The purpose of this thesis was to develop methodologies and procedures for the construction and use of CAD part families. This project uses the software CADDS5 created by Computervision, Inc., and its "Family of Parts" module. This software allows the creation of an entire family of similar parts using a single parametric master model and a text file containing the necessary parameters for each member of the family. CADDS5 users at Raytheon were surveyed to determine how they use standard parts, what types of standard parts are used, and typical modeling strategies. A set of criteria were developed to determine which groups of parts would be good candidates to be used as test cases. Four test cases were used to develop the methodology or procedure for the creation of families of parts. In addition, efficient use of these part families required the development of a set of search engines to allow the users to find parts more easily, and a parts server to generate new family members. The Family of Parts software in CADDS5 serves as a starting point for the creation of a usable library of standard parts. However, it has a poor user interface and has no system for part management and database administration. This thesis has made up for several of these shortcomings, and has created the core of a working library that can be easily used by all of the designers without requiring detailed knowledge of the details behind the implementation. The methodology developed during this project provides the necessary information for designers to create the majority of standard parts in use at Raytheon. For those who want to expand the library, it has provided useful information that will help them create high-quality parts that will work well with this system.

Submitted by HENRIQUE KRIGUER (henriquekriguer@uol.com.br) on 2016-02-15T11:56:47Z No. of bitstreams: 1 Dissertação de Mestrado Henrique Kriguer 2015 corrigido após qualificação.pdf: 1729817 bytes, checksum: 2ab0f19734b9d93a734ea53248959168 (MD5) / Approved for entry into archive by Ana Paula Grisoto (grisotoana@reitoria.unesp.br) on 2016-02-15T12:20:05Z (GMT) No. of bitstreams: 1 kriguer_h_me_guara.pdf: 1729817 bytes, checksum: 2ab0f19734b9d93a734ea53248959168 (MD5) / Made available in DSpace on 2016-02-15T12:20:05Z (GMT). No. of bitstreams: 1 kriguer_h_me_guara.pdf: 1729817 bytes, checksum: 2ab0f19734b9d93a734ea53248959168 (MD5) Previous issue date: 2015-12-21 / O gerenciamento de estoques torna-se cada vez mais importante em função da necessidade de aperfeiçoamento da eficiência na cadeia logística, que se traduz na redução de custos e aumento do nível de serviço. A literatura sobre o gerenciamento de estoques de peças de reposição é ampla, porém é pouco abordada em relação à escolha do modelo de classificação. Neste trabalho, o método Analytic Hierarchy Process (AHP) foi aplicado em uma Empresa de bens de capital para determinar o vetor de prioridade dos critérios adotados para a classificação de peças de reposição. Apresentamos, com base no resultado deste estudo o Índice de Reposição, que foi adotado como um fator de correção nos valores de estoque segundo a classificação ABC. O objetivo foi atingido com o aperfeiçoamento do método de classificação, tornando o trabalho do planejador de estoques melhor estruturado, permitindo que possa tomar a decisão de reabastecimento de forma estruturada conforme parâmetros pré estabelecidos. / The inventory management becomes increasingly important due to the need for improved efficiency in the supply chain, which translates into cost savings and increased service level. The literature on the management of spare parts inventory is wide, but is rarely addressed in relation to the choice of classification model. In this work, the Analytic Hierarchy Process (AHP) method was applied to a Company of capital goods to determine the priority vector of the criteria adopted for the spare parts classification. Here, based on the results of this study the Replacement Index, which was adopted as a correction factor in inventory values according to the ABC classification. The goal was achieved with the improvement of classification method, making the work of the best structured inventory planner, allowing can take the form of structured replenishment decision as pre-established parameters

This dissertation is mapping the practise of securing of purchased parts within Skoda Auto company in pre-production and production of vehicles. There are two approaches compared: existing and new one so-called Kaufteilemanagement. Was done analysis of causes of complications with parts delieveries. Was done analysis of tools used for securing of purchased parts. There are new possible tools proposed. Methods of data acquisition: analysis of empirical data, consultations and discussions with Skoda Auto personnel.

Denna studie är en kvantitativ studie som syftar till att undersöka sambandet mellan tillgängligheten av reservdelar och maskinprestanda. Litografi och plasma är Silexs två produktionsstationer som undersöks i denna studie. Det analyseras data över en tre månaders period för att undersöka sambandet mellan reservdelskostnader och maskinernas drifttid. Metoden innefattar en kvantitativ analys av reservdelslager, maskinprestanda och rapporterade maskintillstånd. Statistiska verktyg används för att identifiera korrelationer. Resultaten visade att det finns en koppling mellan tillgängligheten av reservdelar och deras förbrukning, eftersom de maskiner som hade flest reservdelar på lager också gjorde flest uttag av reservdelar under underhåll. I Litografi fanns det en komplex korrelation: vissa maskiner visade en negativ korrelation mellan kostnad och prestanda eftersom de inte hade tillräckligt med reservdelar på lagret, medan andra maskiner visade en positiv korrelation, vilket tyder på att tillgängliga reservdelar förkortade drifttiden. Plasma-arean visade en positiv korrelation mellan reservdelskostnader och drifttid. Trots detta uppstod begränsningar för kapitalbindning och lagerutrymme som ett resultat av en överrepresentation av långsamtgående reservdelar i lagret. Slutsatsen är att det finns ett samband mellan maskinprestanda och tillgången på reservdelar, och att en balanserad tillgång till kritiska reservdelar är avgörande för att optimera driften. Förbättringar som skulle kunna göras inkluderar att standardisera rapporteringstekniker, skapa ett säkerhetslager för varje maskin. För att analysera slow-mover-reservdelar och göra en ekonomisk jämförelse mellan SLA-täckta och lagerreservdelar krävs ytterligare forskning. / This study is a quantitative analysis that aims to explore the link between spare parts availability and machine performance. The two production lines examined in this study are lithography and plasma at Silex. Data spanning a three-month period is analyzed to examine the correlation between spare parts costs and machine uptime. The methodology involves a quantitative analysis of spare parts stocks, machine performance, and reported machine conditions. Statistical tools are used to identify correlations. The results showed a correlation between spare parts availability and consumption, as machines with the highest spare parts stocks also made the most withdrawals during maintenance. In lithography, a complex correlation was observed: some machines showed a negative correlation between spareparts cost and machine performance due to insufficient spare parts stock, while others showed a positive correlation, suggesting that available spare parts shortened downtime. The plasma area showed a positive correlation between spare parts costs and uptime. However, limitations arose in terms of capital tied up and storage space due to an over-representation of slow-moving spare parts in the stock. The conclusion indicates a correlation between machine performance and the availability of spare parts, emphasizing that a balanced supply of critical spare parts is essential for optimizing operations. Suggested improvements include standardizing reporting techniques and creating a safety stock for each machine. Further research is needed to analyze slow-moving spare parts and make an economic comparison between SLA-covered and stock spare parts.

Syftet med denna studie är att undersöka hur barn i förskolan uppfattar människokroppen, hur de uttrycker sig, hur intresserade de är av lärandet och om det är möjligt att jobba med ämnet människokroppen i förskolan. Jag hoppas att denna studie kan öppna upp för ett ökat intresse kring att jobba med människokroppen i förskolan.Metoden som använts är kvalitativa intervjuer i kombination med bildmaterial i form av konturerna av en människokropp och sju olika kroppsdelar barnen fick placera ut och beskriva funktionen av. Denna metod användes för att ge barnen möjlighet att uttrycka sig fritt kring de olika kroppsdelarna. Intervjuerna genomfördes på 14 barn i åldern 4-5 år. Barnen fick med egna ord förklara hur de olika kroppsdelarna fungerade och hur de tyckte det är att jobba med ämnet människokroppen.Resultatet visar att flertalet av barnen kunde placera ut de flesta kroppsdelarna och beskriva flertalet av kroppsdelarnas funktioner. Majoriteten av barnen i undersökningen tyckte det var roligt att jobba med människokroppen. / The purpose of this study is to examine how preschool children perceive, express and how interested they are about the learning of the human body and if it is possible to work with the topic the human body in preschool. I hope this study could lay as ground for an increased interest in working with the human body in preschool.The method used is qualitative interviews combined with graphic images in form of a texture of a human body and seven different body parts, which the children were to place out and to describe the function of the body part. This method was used to give the children the opportunity to express themselves freely about the different body parts. The interviews were conducted on 14 children ages 4-5. The children got, with her/his own words, explain how the specific body part worked and what her/his thoughts were about working with the subject the human body.The result shows that most of the children could place and explain most of the functions of the body parts used. The majority of the children in this study thought it was fun to work with the human body.

Carbon Capture and Storage Potential Contribution to Mitigate Climate Change By Angel Mario Baca, M.A. The University of Texas at Austin, 2009 Supervisor: Dr. Eric Bickel This thesis evaluates the potential of the Carbon Capture and Storage technologies to mitigate climate change. This work emerged from the current debate regarding when CCS technologies are going to be ready in a commercial-scale, or whether they are going to be economically viable. Geologically, the world contains enough room for storing CO2 emissions, but it is still unsolved if leakage can be controlled and monitored. This research focuses on the development of an economic model to estimate the value of CCS.. This model uses equations from the DICE (Dynamic Integrated model on Climate and the Economy). Then, it estimates what change in temperature could occur, and computes the present value of damages to the economy. Moreover, emissions are simulated using the 40 scenario emissions from the Intergovernmental Panel on Climate Change. As the main conclusion of this model, CCS has to be deployed in almost in the entire number of fossil fuel plants around the world and has to be done in the next 30 years to see CCS having an impact, otherwise it would be relatively small and not worth it. Moreover, CCS technologies are part of the components to reduce climate change, but not the main one. It is required that governments, companies, and institution focus their efforts in working collaboratively towards the enforcement of new policies and development of more technologies. / text

This commentary accompanies a portfolio of nine compositions written between October 2006 and June 2009. This commentary traces the development of a range of compositional ideas throughout the portfolio. These revolve around the creation of multilayered textures where all the material and all subtle variations thereof are audible, leading to an investigation of rhythmical block durations and the role of memory. The context in which these ideas arose is provided through discussion of specific existing work that closely relates to the portfolio, in particular by John Cage, Morton Feldman, György Ligeti and Giacinto Scelsi.