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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Úprava zavěšení zadního kola formulového vozu / Formula Car Rear Wheel Carrier Redesign

Okáník, František January 2014 (has links)
The thesis consists of rear wheel suspension design for light Formula Student racing car, especially design of upright, wheel hub and other parts of the assembly. Design was done in CAD software PTC Creo 2.0. Thesis also mentions calculation of critical wheel loads, wheel bearing life calculation and wheel loads during the race as well as stress analysis in Ansys Workbench and fatigue life analysis.
12

Relations cumulat-liquide dans les massifs alcalins et carbonatitiques: les cas des massifs de Vuoriyarvi (Péninsule de Kola, Russie) et de Tajno (N.E. Pologne)

Brassinnes, Stéphane 06 June 2006 (has links)
Les carbonatites sont des roches magmatiques essentiellement composées de carbonates (calcite et/ou dolomite) d'origine magmatique. Leur statut pétrographique en tant que liquide magmatique ou cumulat reste à l'heure actuelle fort contreversé. Cette thèse de doctorat à pour objectif une étude pétrographique fine de ces roches couplée à des microanalyses in-situ des éléments en trace des principaux minéraux (carbonate, apatite). / Doctorat en sciences, Spécialisation géologie / info:eu-repo/semantics/nonPublished
13

Experimentální studium modifikátorů tření v kolejové dopravě / Experimental study of friction modifiers in rail transportation

Knápek, Jiří January 2017 (has links)
The adhesion in the wheel-rail contact can be effectively controlled by using the friction modifier. Adhesion control can reduce excessive wear of the contact bodies or noise. The essence of this diploma thesis is to determine the optimal amount of friction modifier in wheel-rail contact depending on the climatic and operating conditions. For experimental study of the behavior of the friction modifier, the twin-disc device is used. Twin-disc simulates and controls the most important operating parameters such as speed, slip, attack angle or contact pressure. On the basis of these findings, the off-board top-of-rail lubricator system was designed. This system controls the amount of friction modifier according to current climatic and operating conditions.
14

Relations cumulat-liquide dans les massifs alcalins et carbonatitiqes. Les cas des massifs de Vuoriyarvi (Russie) et de Tajno (Pologne).

Brassinnes, Stéphane R. W. 06 June 2006 (has links)
Les carbonatites sont des roches magmatiques essentiellement composées de carbonates (calcite et/ou dolomite) d'origine magmatique. Leur statut pétrographique en tant que liquide magmatique ou cumulat reste à l'heure actuelle fort contreversé. Cette thèse de doctorat à pour objectif une étude pétrographique fine de ces roches couplée à des microanalyses in-situ des éléments en trace des principaux minéraux (carbonate, apatite).
15

Barnevaksinering i Montsjegorsk og Kirovsk kommuner på Kola – følges Nasjonal Vaksinasjonskalender? / Are the Russian National Vaccination Calendar followed regarding children’s vaccination in Monchegorsk and Kirovsk municipalities on the Kola penninsula?

Johnsen, Børre January 2014 (has links)
Hensikt: Hensikten med studien var å undersøke om Nasjonal vaksinasjonskalender for Russland følges i de to kommunene Montsjegorsk og Kirovsk på Kola når det gjelder vaksinering av barn i alderen 0-2 år Metode: Studien er en retrospektiv kohortstudie av vaksinerte barn i alderen 0-2 århenholdsvis Montsjegorsk kommune (2007 og 2008) samt Kirovsk kommune (2006, 2007,2008 og 2009). Resultat: Denne studien viser ingen signifikant forskjell på antall vaksinerte barn i Montsjegorsk og Kirovsk, der vi har fått tilgang til vaksinasjonskortene, og dekningsgrad forøvrig barnevaksinering i Russland. Det har ikke vært mulig å få fatt i populasjonsdata foraldersgruppen 0-2 år verken i Montsjegorsk eller Kirovsk for de årskullene undersøkelsenomfatter. Resultatene baserer seg derfor på vaksinasjonskortene vi har fått tilgang til. Konklusjon: Barn født i Montsjegorsk i 2007 og 2008, samt barn født i Kirovsk i 2006,2007, 2008 og 2009, og som det var vaksinasjonskort tilgjengelige for, ble vaksinert sombestemt i den nasjonale vaksinasjonskalenderen for Den Russiske Føderasjon / Aim: This study aimed to investigate adherence to Russia’s National Vaccination Calendarin two municipalities, Monchegorsk and Kirovsk, regarding vaccination of children 0-2years of age, and also determine who was registered for vaccination. Method: This is a retrospective cohort study of vaccinated children up to two years of age in Monchegorsk municipality during 2007–2008 and Kirovsk municipality during 2006–2009. Results: We were unable to obtain population data regarding 0-2 year ols children in Monchegorsk and Kirovsk. However, accessable vaccination cards shoved no significant differnece in the number of vaccinated children in these municipalities compared with general coverage for child vaccination in Russia. Conclusion: Vaccination cards for children born in Monchegorsk during 2007–2008 or Kirovsk during 2006–2009 suggest that vaccination occurred as prescribed by the National Vaccination Calendar of the Russian Federation / <p>ISBN 978-91-982282-5-0</p>
16

Návrh a výroba kompozitního kola vozidla Formule Student / Composite Formula Student Wheel

Jelínek, Josef January 2019 (has links)
This master thesis represents a step forward in vehicle dynamics of TU Brno Racing Formula Student team from Brno University of Technology monoposts. A detailed research focused on light automotive wheels. Its main part is to design and make a composite wheel for a formula monopost Dragon 9. The wheel design was formed from the rules side, car packaging, forces acting and limits of composite parts production. There’s a collection of CAD documentation of wheel designs, moulds and connected fixtures. The designed moulds for hollow carbon fiber wheels were manufactured. The technology in making of composite wheels is described in detail. Also, the ways of testing the wheel before a straight use on a race car were designed. There are several wheel prototypes made as an outcome of this thesis. The wheel design is reviewed in terms of functionality and manufacturing side of things.
17

Vývoj maziva pro temeno kolejnice / Top of rail lubricant development

Skurka, Šimon January 2021 (has links)
Friction modification within the wheel-rail interface is an important way of achieving ecologically friendly transportation of both persons and goods. This thesis aims to develop a new TOR lubricant, which will be able to maintain suitable frictional conditions while securing minimal adhesion required for traction. All measurements were carried out on tribometer MTM in the ball-on-disc configuration. In the first step, individual components were examined. More complex compositions were measured after that and the three best of them were compared with commercial TOR lubricants. The results show a good ability of developed compositions to maintain required adhesion, reduce wear, and all of them had resistivity against over-lubrication. Lastly, the process of lubricant verification before its application in real traffic was discussed.
18

Podnikatelský záměr / Business Plan

Fukátko, Petr January 2010 (has links)
The object of this master’s thesis is business plan for a city bikes shop. It’s first part is more teoretical and about firm’s external surroundings. The main part of business plan is in the second part of thesis.
19

Konstrukční návrh úhlové kyvadlové nápravy / Mechanical Design of Semi-Trailing Arm Suspension

Vondrák, Zdeněk January 2013 (has links)
This thesis is concerned with Semi-trailing arm suspension on racing car Škoda 130RS of group V. Kinematic analysis of suspension has been performed as well as stress analysis of single parts. On basis of these analysis, suspension design has been created. Design of suspension and fixtures are solved with regard to simplicity of manufacture, reduction of weight and reduction of maximal stresses. Adjustment of geometry of suspension (toe and camber) is realised by changing the position of fixtures on the body.
20

Konstrukce disku kola osobního automobilu / Design of Passenger Car Wheel

Kapoun, Lukáš January 2014 (has links)
The present master thesis deals with the design of wheel disk for passenger car. The review part of this thesis summaries the history and development of the wheel; this is followed by a description of individual construction types of wheel disk for passenger car presently used. The construction part of this thesis provides a design of disk of given parameters based on the analysis of forces acting on the car wheel. For the purposes of design, the stress and fatigue analyses are performed.

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