Submitted by Caroline Periotto (carol@ufscar.br) on 2016-09-26T15:05:24Z No. of bitstreams: 1 DissGTV.pdf: 1872903 bytes, checksum: 8df6b2f211cfc4236fc723147c24d9bf (MD5) / Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-09-26T20:50:51Z (GMT) No. of bitstreams: 1 DissGTV.pdf: 1872903 bytes, checksum: 8df6b2f211cfc4236fc723147c24d9bf (MD5) / Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-09-26T20:50:56Z (GMT) No. of bitstreams: 1 DissGTV.pdf: 1872903 bytes, checksum: 8df6b2f211cfc4236fc723147c24d9bf (MD5) / Made available in DSpace on 2016-09-26T20:51:03Z (GMT). No. of bitstreams: 1 DissGTV.pdf: 1872903 bytes, checksum: 8df6b2f211cfc4236fc723147c24d9bf (MD5) Previous issue date: 2015-07-03 / Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) / Due to the current growth in the fossil fuels consumption, there is a great concern about the increase in pollutant emissions. In order to reduce these emissions, research indicates that the decrease in vehicle weight can be one of the solutions to reduce these gas emissions. One possible way to reduce the car weight is the replacement of parts that uses high density metals by Magnesium alloys. The major problem with this replacement is the lack of ductility that this material has at room temperature, being necessary to heat the plates before the conformation. This heating process has a high production costs and it is unfeasible to use in the automotive industry today. In view of this problem, this work aims to study this lack of conformity to room temperature using a microstructure modification technique located in the regions of conformation. The technic used was Friction Stir Processing (FSP) at high speed. This processing is similar to Friction Stir Welding (FSW), but without joining materials. The FSP is just a localized microstructural modification. The analysis performed in this study after processing at 1, 7 and 10 m/min show that the microstructure and mechanical properties undergoes various changes at for every processing speed output different. The results showed that the material after processing improves the ductility at room temperature as grain size decreases. / Com o atual crescimento do consumo de combustíveis fosseis, existe uma grande preocupação com o aumento de emissões de gases poluente. Para redução dessas emissões, pesquisas apontam que a diminuição do peso de veículos pode ser uma das soluções para reduzir as emissões de gases poluentes pelo aumento da eficiência energética. Uma forma possível de diminuir o peso de automóveis é pela substituição de partes que utilizam metais com alta densidade por ligas de Magnésio. O grande problema desta substituição é a falta de dutilidade que este material possui a temperatura ambiente, sendo necessário aquecer as chapas antes da conformação. Atualmente este processo de aquecimento gera um alto custo de produção dificultando sua utilização na indústria automotiva. Tendo em vista este problema, o presente trabalho tem como objetivo entender esta dificuldade na conformação a temperatura ambiente e propor uma solução utilizando uma técnica de modificação microestrutural localizada nas regiões de conformação. Esta técnica é o Processamento por Fricção e Mistura (FSP – Friction Stir Processing) à altas velocidade. Este processamento é semelhante ao de Soldagem por Fricção e Mistura (FSW – Friction Stir Welding), mas sem a formação de uma região de união entre materiais. O FSP é apenas uma modificação microestrutural localizada. As análises realizadas neste estudo após o processamento à 1, 7 e 10m/min apontam que a microestrutura e as propriedades mecânicas sofrem variações diferentes a cada velocidade de processamento. Os resultados mostraram que o material obteve uma melhora na dutilidade à temperatura ambiente devido à diminuição do tamanho de grão.

Syfte: I problembeskrivningen konstaterades att de logistikproblem som upplevs på byggprojekt ofta är kopplade till glappet mellan projekterings- och produktionsfasen. Problemen är även kopplade till brist på informationsutbyte, projektförståelse och långvariga relationer samt attityd till samarbeten och skilda tolkningar. Syftet är att undersöka hur informations- och materialflödena hanteras på anläggningsprojekt samt vad som kan göras för att optimera försörjningskedjan och därmed främja logistiken.  Metod: Undersökningens huvudsakliga angreppssätt är en kvalitativ studie. Kvalitativa data, i form av primärdata, samlas in genom en intervjustudie. För att få en teoretisk bakgrundsförståelse samlas sekundärdata in genom att studera tidigare litteratur inom ämnet. Detta ligger till grund för att uppnå det formulerade målet för undersökningen.  Resultat: Studien konstaterar att ett gränsöverskridande samarbete och ett helhetsperspektiv behövs för att gynna försörjningskedjan och logistikarbetet på ett anläggningsprojekt. Om aktörer i de olika faserna involveras i varandras arbete skapas bättre förutsättningar för att hantera informations- och materialflödena och därmed främja logistiken på projektet. Resultatet bidrar till ökad inblick i hur flödena hanteras idag samt vilka begränsningar och förbättringsmöjligheter som finns. Detta ger en indikation på varför anläggningsbranschen inte har nått samma framgångar kring förbättring av försörjningskedjan som andra företag.  Konsekvenser: För att möta den utmaning som finns i anläggningsbranschen med avseende på logistiken krävs följande:  Att informations- och materialflödet hanteras på ett strukturerat sätt. Att skapa långvariga relationer, använda digitala verktyg i större omfattning och att entreprenörerna gör integrerade inköp. Att aktörer inom de olika faserna integreras i varandras arbete, ha en samordningsansvarig inom projektet och använda sig utav logistikcentra.  Begränsningar: Studien avgränsades till att fokusera på aktörer som i regel inte har en direkt inverkan på logistikarbetet. I efterhand görs bedömningen att det varit till rapportens fördel att intervjua fler aktörer som kan påverka logistiken. Detta för att få en bredare bild av den syn som finns i projekterings- och planeringsfasen samt byggfasen. Trots att studien visar på olika aktörers perspektiv av situationen uppnås inte en rättvis bild och ett mer balanserat urval av respondenter hade behövts. Det är viktigt att nämna att studien inte fokuserar på att undersöka hur förbättringarna kan genomföras.  Nyckelord: Logistik, Supply Chain Management, ramverk för Supply Chain Planning, anläggningsprojekt, informations- och materialflöden. / Purpose: In the introduction it was concluded that the experienced logistical difficulties on a construction site often were related to multiple reasons. Examples of these are the disconnection between the design and production phase, lack of information exchange, project understanding and relationships as well as attitude towards cooperation and the various interpretations. The aim of this study is to investigate how information and material flows are managed within construction projects as well as finding options to optimize the supply chain and in turn promote the logistics.  Method: For the methodological approach of the study, a qualitative method is used. Qualitative data, in form of primary data, is collected through an interview study. To build an understanding of the theoretical background, secondary data is gathered by studying former literature research findings. This is the basis for achieving the goal of the study.  Findings: The result of the study shows that a cooperation between disciplines and a holistic approach is needed to promote the supply chain and logistics within a construction project. When disciplines in the various phases are involved in each other’s work, conditions are being created for managing the information and material flows and in turn improving the logistics. The result contributes to insight as to how the flows are managed today as well as the experienced limitations and improvements. This gives an indication of why the construction industry has not achieved the same success in enhancement of the supply chain as other industries.  Implications: This is what is needed to meet the challenge of improving the logistics in the construction industry:  Information and material flows need to be handled in a structured manner.  Creation of long-term relationships, increased usage of IT-tools and integrating purchases within contractors.  Disciplines within the various phases need to be integrated in each other’s work, having someone who coordinates the responsibilities within the project and utilization of logistics centers.  Limitations: Initially, the study was limited to only focusing on disciplines who generally do not have a direct impact on the logistics. In hindsight, it is considered that the study would benefit from interviewing more disciplines who can affect the logistics. This would provide a broader view of the aforementioned phases’ perspective. Although the study indicates different disciplines’ standpoint of the situation, a fair result is not fulfilled as a more equal selection of interviewees would be needed. It is important to note that the study does not focus on investigating how the improvements can be implemented.  Keywords: Logistics, Supply Chain Management, framework for Supply Chain Planning, construction projects, information and material flow.

This master´s thesis is focused on technological designing in a small company ENGITEC Motosport s.r.o. In first theoretical part of the thesis is this subject described in detail and analyzed in terms of economic and technical aspect. Next part describes the current state of the company and the production hall as well with keep on its current layout. In the following chapters is chosen piston-shaped component, which is manufactured by the company and three different variants of the piston production. Then one of them is selected, to which all related capacities calculations are made. In the final part of the thesis is proposed the relevant final layout of the hall and there is also the technical-economic evaluation of the most relevant variant included. Key words

This thesis describes the design of a new plant for the production of printed circuit boards with a capacity of 40,000 square meters per year. Describes the basic principles of a new production, production logistics principles and technological design, procedure for application of the method SLP, placement of production areas and capacity calculation of employees and machines. It also describes the technological process of production of printed circuit boards with subtractive method and discusses the different steps of production with regard to the proposed production. The practical part deals with the actual realization of the project, a selection of production technology, machinery, design the layout of the building, capacity calculations, deployment tools, practical application of the method SLP, visualization of production in the Plavis VisTable software, waste management and economic evaluation of project costs.

The main goal of this diploma thesis is new lay – out of organizational structure of assembly lines, which is leading to the material flow shortening and elimination of problems with factionalism of industrial process. In this thesis is introduce the company, where is proposed new organizational structure of assembly lines, together with description of deficiencies current organization. The good know ledges of assembly process and technology is important for the right modification. According theoretic findings it was proposed new organizational structure of assembly lines and the cost saving was calculated

The aim of this thesis is to reach a distinctive rationalization of the production and assembling plant of Cargo Van Brno company. In the project of new lay-out of the production area were all restrictions given by management of the company and by owner of the property strictly met. Technological changes of the process plan and investments suggestions are determined by the company's strategic plan.

The goal of the Master thesis is to design a grain container. The thesis involves a possible method of grain storage depending on the quality and condition of the grain and also the ways of filling and emptying the container with all the problems that might occur. The thesis deals for example with a possibility of occurrence of vault and with it associated change of state of stress, or with the pressure surges in the container. The thesis involves an analysis of an appropriate construction solution, a design of the main dimensions of the container and a test calculation of the container ´s strength.

The aim of the thesis is to elaborate the technological project for non-rotary (plate) parts production based on requirements of TOS KUŘIM – OS, a.s. The literary studies from the area of machining technology and technological designing are in the first part of the thesis. The evaluation of the contemporary state of production and dividing of products into groups is made in the next part. The following part of the thesis is dealing with the design and analysis of designed variants of disposition, choosing the most suitable variant, its optimalization and evaluation by the help of capacitive calculation. The drawing documentation (material flow included) and technoeconomic evaluation is elaborated in the final part of the thesis.

Abstract This thesis explored innovative ways to improve estimation of material footprint-type indicators in application of Input-Output (IO) analysis to Material Flow Accounting. The following six research questions were addressed: 1) What is the potential impact of sector aggregation in IO modelling of raw material flows? Modelling errors due to aggregation of industries with dissimilar material requirements and trade structures into a single sector in IO models when calculating the material footprint were empirically analysed relative to greenhouse gas emissions. Significant biases emerged for raw material flows, which suggests that care should be taken when aggregating extractive sectors in IO models. 2) Can bottom-up approaches, such as LCA (Life Cycle Assessment), improve estimation of the raw materials embodied in trade products? and 3) What are the implications of integration of country-specific information from high geographical coverage IO models into LCA approaches for calculation of raw material embodied in trade products? An approach for combining country-specific production blueprints with LCA based on regional averages was developed. This approach proved useful in refining estimates of upstream raw materials embodied in trade products, although care is needed during its application since new biases may arise. 4) Can further perspectives be gained with a new allocation method, the ‘value added-based material footprint’, which assigns supply chain-wide raw material extractions to each participating economic actor according to its added value generation, contributing to discussions on the distribution of mitigation costs? Certain countries and sectors were found to be more material-intensive with this new accounting approach than in other widely known allocation methods, e.g. consumer footprint. 5) Are there unequal exchanges between high-income economies and middle- and lower-income countries when measured in terms of raw material and value added flows? and 6) Could integration of local and global IO data provide useful insights to study presence/absence of unequal material exchange at sub-national level? A study of material flows at inter- and intra-national level demonstrated that a regional economy can play a twofold role, both as sink or source of raw materials and in value added, depending on its position in the global economic hierarchy. / Tiivistelmä Tässä työssä tutkittiin innovatiivisia tapoja, joilla voitaisiin parantaa materiaalijalanjälki -tyyppisten indikaattoreiden käytettävyyttä panos-tuotos (Input-Output, IO) -analyysissa, kun niitä sovelletaan Materiaalivirta-analyysi (Material Flow Accounting, MFA) -metodiin. Seuraaviin tutkimuskysymyksiin haettiin vastauksia: 1) Mikä on sektorien yhdistämisen potentiaalinen vaikutus raaka-ainevirtojen IO-mallintamisessa ja miten poikkeamia voidaan estää? Tämän puitteissa tarkasteltiin mallinnusvirheitä, jotka johtuvat erilaisten toimialojen yhdistämisistä yhdeksi sektoriksi. 2) Voivatko alhaalta ylöspäin suuntautuvat lähestymistavat, kuten elinkaariarviointi parantaa tuotteisiin sisältyvien raaka-ainevirtojen arviointia? ja 3) Mitä vaikutuksia on laajan maantieteellisen kattavuuden IO-malleihin sisältyvien maakohtaisten tietojen yhdistämisestä LCA-pohjaisiin lähestymistapoihin, kun tavoitteena on laskea tuotteisiin sisältyviä raaka-ainemääriä? Tämän tutkimista varten kehitettiin lähestymistapa, joka yhdisti maakohtaiset tuotantosuunnitelmat ja elinkaariarvioinnin. Tämä lähestymistapa osoittautui hyödylliseksi tarkentamalla arvioita tuotteissa olevista raaka-aineista, vaikkakin sen soveltaminen edellyttää varovaisuutta, koska uusia vääristymiä voi syntyä. 4) Voidaanko uusia näkökulmia löytää uudella arvonlisäykseen perustuvalla allokointimenetelmällä, joka jakaa raaka-aineen louhinnan kullekin toimintaketjun osallistuvalle taloudelliselle toimijalle lisäarvon tuotannon mukaan? Tämän uuden kirjanpitomenetelmän mukaan jotkut maat ja alat ovat materiaali-intensiivisempiä kuin niitä on pidetty kulutuksen jalanjälkiallokointimenetelmien perusteella. 5) Onko korkean tulotason talouksien ja keskitasoiselle ja alhaiselle tulotasolle asettuvien maiden välillä epätasaisia vaihtoja, kun raaka-ainekulutusta ja arvonlisäystä mitataan? ja 6) Voisiko paikallisten ja globaalien IO-tietojen integrointi antaa hyödyllisiä näkökulmia tutkimukseen, joka tarkastelee epätasaisen aineenvaihdon esiintymistä tai puuttumista alueellisella tasolla? Materiaalivirtojen tutkiminen kansainvälisellä ja kansallisella tasolla, jossa yhdistettiin IO-tietokannat erilaisella maantieteellisellä resoluutiolla osoitti, että alueellisella taloudella voi olla kaksoisrooli sekä raaka-aineiden että arvonlisäyksen lähteenä tai nieluna riippuen sen asemasta globaalissa taloushierarkiassa.

This thesis is a comprehensive study describing and quantifying material flows of waste electric and electronic equipment (WEEE) in the Czech Republic; specifically the material flow of small waste electric and electronic equipment (s-WEEE) as well as representative substances. The studied material flows were estimated regarding aspects of the environmental impact. The End-of-Life mobile phone is seen as a typical representative of s-WEEE ; therefore material flows of mobile phones are described in this thesis as well. To put it in concrete figures, approximately 124 thousand tons of WEEE from households originated in the Czech Republic in 2010, where each inhabitant got rid off 4 pieces of WEEE in average. Further, total production calculating also consumer-like WEEE from companies and institutions was around 141 thousand tons in 2010. S-WEEE present around 15% from the total amount of WEEE originating in 2010; however it is more than 80% as regards the number of pieces. Despite of that fact the recycling potential of Au for instance is slightly higher by s-WEEE than by large WEEE (63kg/year compared to the 59kg/year respectively). As regards estimation of the total production of EoL mobile phones, around 45 thousand pieces originated in the Czech Republic between the years 1990-2000 and 6,5...