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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.
51

Environmentální porovnání dřevostavby a zděné stavby bytového domu / Environmental assessment of timbered house and brickwork block of flats

Ostrovský, Milan January 2015 (has links)
This thesis is concerned with the evaluation of sustainable construction. It is a multi-criteria evaluation focused on building environmental, socio-cultural sphere, economics and management. The reviews I chose passive apartment house in two of designs. The purpose of this study is to compare the standard insulated brick buildings and in our non-traditional wood construction. At the beginning there will explain the basic concepts associated with the topic. After that, the problems of the sustainable construction and environmental impact assessment, which will describe the basic concepts, methodologies, criteria, description of evaluation. The last part will be made an example of evaluation SBToolCZ brick and wooden buildings passive residential Duma. Comparison of both results achieved certification and think about the advantages or disadvantages of both options. The aim of this thesis is dedicated readers and explain to them the issues of this topic.
52

Material migration in tokamaks: Studies of deposition processes and characterisation of dust particles

Weckmann, Armin January 2015 (has links)
Thermonuclear fusion may become an attractive future power source. The most promising of all fusion machine concepts is the tokamak. Despite decades of active research, still huge tasks remain before a fusion power plant can go online. One of these important tasks deals with the interaction between the fusion plasma and the reactor wall. This work focuses on how eroded wall materials of different origin and mass are transported in a tokamak device. Element transport can be examined by injection of certain species of unique and predetermined origin, so called tracers. Tracer experiments were conducted at the TEXTOR tokamak before its final shutdown. This offered an unique opportunity for studies of the wall and other internal components: For the first time it was possible to completely dismantle such a machine and analyse every single part of reactor wall, obtaining a detailed pattern of material migration. Main focus of this work is on the high-Z metals tungsten and molybdenum, which were introduced by WF6 and MoF6 injection into the TEXTOR tokamak in several material migration experiments. It is shown that Mo and W migrate in a similar way around the tokamak and that Mo can be used as tracer for W transport. It is further shown how other materials - medium-Z (Ni), low-Z (N-15 and F), fuel species (D) - migrate and get deposited. Finally, the outcome of dust sampling studies is discussed. It is shown that dust appearance and composition depends on origin, formation conditions and that it can originate even from remote systems like the NBI system. Furthermore, metal splashes and droplets have been found, some of them clearly indicating boiling processes. / <p>QC 20151203</p>

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