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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.
41

On the Manufacturing of SFF Based Tooling and Development of SLS Steel Material

Boivie, Klas January 2004 (has links)
No description available.
42

Právní úprava postavení politických stran / Legal regulation of the position of political parties

Šálek, Stanislav January 2012 (has links)
The presented thesis deals with political parties and especially with their legal regulation. However, the thesis does not only use the legal statutes and theirs provisions, but it also aspire to set the existence and the action of political parties into a wider context, which is provided the political science. The subject of the thesis is restricted to the Czech Republic (respectively to its contemporary national territory and to political parties, which existed or are existing within this territory). That's why the statutory regulation of political parties' position is set into the context of czech constitutional law order as well. Concurrently, only selected aspects of existence and action of political parties are carefully analysed. In spite of that, the thesis provides a basic overview of general legal regulation of political parties in the Czech Republic. This thesis consists of four chapters. The first chapter pursues historical development of political parties' phenomenon in territory of contemporary Czech Republic It does so by characterizing of political parties themselves (including the enumeration of the most important ones of them), and further by regarding to their legal regulation in specific historical periods, which preceded the enactment of contemporary valid legal regulation of...
43

BAMBUVISKOS : En hållbar fiber för framtiden? / Bamboo Viscose : a Sustainable Fibre for the Future?

Svensson, Karin, Magnusson, Elin January 2013 (has links)
Naturskyddsföreningen gav författarna uppgiften att undersöka förekommande viskosprocesser och alternativa regenereringsprocesser, detta för att identifiera hur hållbara de är ur ett miljöperspektiv och vilka processer som går att applicera på bambu. Detta för att se möjligheten att märka bambuviskos med Bra Miljöval och för att klargöra frekvent uppkommande frågor angående bambuviskos. Syftet är att se på de olika processernas kemiska innehåll samt vilka utsläpp de orsakar till luft och vatten. Ett delmål med rapporten är att den ska kunna användas som material vid vidareutveckling av kriterierna för Bra Miljöval Textil. Resultat som erhållits vid jämförelser av studerad litteratur är att de betydande faktorerna för miljöpåverkan från massaframställningen samt viskos- och lyocellprocessen beror av: använda kemikalier i processen, energianvändningen och vilken typ av energi, möjligheten till rening av utsläpp till luft och vatten samt återvinning av energi och kemikalier. Beroende på vilket råmaterial som används vid massaframställningen kan skillnader i markanvändning, användning av bekämpningsmedel och gödningsmedel samt upptagande av koldioxid skilja sig. Massa- och fiberframställning bör vara integrerade då energiförbrukning och mängd kemikalier kan minskas. Energin kan dessutom återvinnas till större utsträckning.Genom miljömärkningar från oberoende organisationer blir det lättare för konsumenter att göra miljömedvetna val och veta vad märkningarna står för. Sammanfattningsvis ska det påpekas att om regenererad bambu framställs som den görs idag är den ingen hållbar fiber, men sker framställningen i en integrerad process där kemikalier och energi återvinns samt rening av utsläpp till luft och vatten sker, kan bambuviskos bli en hållbar fiber för framtiden. The Swedish Society for Nature Conservation (SSNC) gave the authors the task to investigative present viscose processes and alternative regeneration processes to identify how sustainable they are from an environmental perspective, and examine which processes that can be applied to bamboo. This to see the possibility to label bamboo viscose with “Bra Miljöval” (Good Environmental Choice), which is the eco-label of SSNC, and to clarify the frequently emerging issues concerning bamboo viscose. The aim is to look at the various processes, their chemical content and the emissions they cause to air and water. Another objective of the report is that it can be used as material for further development of the criteria for “Bra Miljöval”.Results obtained when comparing the studied literature is that the significant factors of the environmental impact from the pulp production, the viscose and lyocell processes depends on: chemicals used in the process, energy and energy source, the possibility of purifying emissions to air and water and recycling of energy and chemicals. Depending on the raw materials used for pulp production, differences in land use, use of pesticides and fertilizers as well as absorption of carbon dioxide differ. Pulp and fibre production should be integrated to reduce energy consumption and the amount of chemicals used. The energy can also be recycled to a greater extent.Eco-labels from independent organizations will make it easier for consumers to make environmentally conscious choices and be aware of what the labels stand for.In conclusion, it should be noted that if the regenerated bamboo is produced as it is today, it is not a sustainable fibre. If the production is done through an integrated process in which chemicals and energy recovery and purification of air and water occurs, bamboo viscose can be a sustainable fibre for the future. / Program: Textilingenjörsutbildningen
44

On the Manufacturing of SFF Based Tooling and Development of SLS Steel Material

Boivie, Klas January 2004 (has links)
No description available.
45

Shattering Kraft Recovery Boiler Smelt by a Steam Jet

Taranenko, Anton 19 March 2013 (has links)
Kraft recovery boiler smelt is shattered into small droplets by an impinging steam jet to prevent smelt-water explosions in the dissolving tank. Inadequate shattering increases the likelihood of dissolving tank explosions. While industry has not dedicated much effort to smelt shattering, the safety implications require smelt shattering to be studied in detail. An experimental set-up was constructed to simulate the shattering operation using a water-glycerine solution and air instead of smelt and steam respectively. The objective was to examine how physical properties and flow characteristics affect shattering. It was found that increasing shatter jet velocity greatly reduced droplet mean diameter. Increasing the liquid flow rate greatly increased droplet size, as expected. Shattering was not significantly affected by viscosity, unless a weak shatter jet was used on a highly viscous fluid. Increasing the proximity of the shatter jet nozzle decreased droplet size.
46

Shattering Kraft Recovery Boiler Smelt by a Steam Jet

Taranenko, Anton 19 March 2013 (has links)
Kraft recovery boiler smelt is shattered into small droplets by an impinging steam jet to prevent smelt-water explosions in the dissolving tank. Inadequate shattering increases the likelihood of dissolving tank explosions. While industry has not dedicated much effort to smelt shattering, the safety implications require smelt shattering to be studied in detail. An experimental set-up was constructed to simulate the shattering operation using a water-glycerine solution and air instead of smelt and steam respectively. The objective was to examine how physical properties and flow characteristics affect shattering. It was found that increasing shatter jet velocity greatly reduced droplet mean diameter. Increasing the liquid flow rate greatly increased droplet size, as expected. Shattering was not significantly affected by viscosity, unless a weak shatter jet was used on a highly viscous fluid. Increasing the proximity of the shatter jet nozzle decreased droplet size.

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