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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.
111

Historie českého (československého) reenactingu / History of the Czech(oslovakian) reenacting

Procházka, Filip January 2013 (has links)
The goal of this thesis is to do research , as wide as possible, in the most popular part of hobby named reenacting or reenacting (Napoleonic era, Austro-Prussian Wars, American Civil War, Second World War and some new topic - Czechoslovak Peoples Army, Royal Air Force and Czechoslovak Policemen before WW2). Thats mean commemoration and re-enactment of military history and military units in whole its history from time before 1989 to the future. I tried to find grounds of this hobby and describe development of it. As I expected, progress of this hobby or movement is larger, but this hobby existed before 1989 too. Reenactors reenacted and portrayed older conflicts as Napoleonic and Austro-Prussian war. Future reenactors were mainly fencers and tramps. Year 1989 was turning point for all reenactors. Theirs hobby is legal, it is possible to travel, to unite, to ground living history groups, own weapons, speak about all part of our history. It was possible to share and search information, regulation with and in foreign countries, foreigners and archives and museums. Main goal of reenactors is to portray theirs archetypes as good as possible. Public can see not only reconstruction of battles, but open air exhibition - "very interactive museums". This thesis can't be described as "Complete, all history of...
112

Application of electrodes with redox mechanisms for the desalination of water / Applicering av elektroder med redoxmekanismer för avsaltning av vatten

Moreno Cerezo, Pablo January 2023 (has links)
Capacitive deionization is a promising technology for purification and desalination of brackish water with great advantages over current technologies due to its low operating cost and high-water recovery ratio. Most of the system studied relies on the adsorption/desorption capacity of activated carbon electrodes due to its high surface area. However, its specific adsorption capacity is limited since the adsorption is predominantly on the surface of the electrodes. In this thesis we propose the use of polyaniline as a chloride-ion adsorption material. Polyaniline is a redox polymer able to accommodate anions in several of its three states when subjected to an external voltage. To this end, we synthesized polyaniline by electrodeposition technique and its electrochemical behavior was studied. A hybrid CDI system was assembled, using PANI as anode material and activated carbon cloth as cathode, showing outstanding adsorption of 37.26 mg/g Cl at current densities of 250 A/g. The energy consumption of this system was of 0.4979 kWh/m3. Its stability was evaluated over 50 cycles with negligible capacity loss. Along with its use in a CDI system, the aim of this thesis was to understand the mechanisms of operation of this material, by means of its physical and electrochemical characterization, as well as its efficiency and stability through the use of this material in capacitive deionization cells. / Kapacitiv avjonisering är en lovande teknik för rening och avsaltning av bräckt vatten med stora fördelar jämfört med nuvarande teknik på grund av dess låga driftskostnader och höga vattenåtervinningsgrad. De flesta av de studerade systemen bygger på adsorptions/desorptionskapaciteten hos elektroder av aktivt kol på grund av dess stora yta. Dess specifika adsorptionskapacitet är dock begränsad eftersom adsorptionen huvudsakligen sker på elektrodernas yta. I den här avhandlingen föreslår vi att polyanilin används som adsorptionsmaterial för kloridjoner. Polyanilin är en redoxpolymer som kan ta emot anjoner i flera av sina tre tillstånd när den utsätts för en extern spänning. För detta ändamål syntetiserade vi polyanilin genom elektrodepositionsteknik och dess elektrokemiska beteende studerades. Ett hybrid CDI-system monterades med PANI som anodmaterial och aktiverad kolduk som katod, vilket visade en enastående adsorption av 37,26 mg/g Cl vid en strömtäthet på 250 A/g. Energiförbrukningen för detta system var 0,4979 kWh/m3. Systemets stabilitet utvärderades över 50 cykler med försumbar kapacitetsförlust. Förutom användningen i ett CDI-system var syftet med denna avhandling att förstå detta materials funktionsmekanismer genom fysisk och elektrokemisk karakterisering samt dess effektivitet och stabilitet genom användning av detta material i kapacitiva avjoniseringsceller.
113

Peter Guthrie Tait : new insights into aspects of his life and work : and associated topics in the history of mathematics

Lewis, Elizabeth Faith January 2015 (has links)
In this thesis I present new insights into aspects of Peter Guthrie Tait's life and work, derived principally from largely-unexplored primary source material: Tait's scrapbook, the Tait–Maxwell school-book and Tait's pocket notebook. By way of associated historical insights, I also come to discuss the innovative and far-reaching mathematics of the elusive Frenchman, C.-V. Mourey. P. G. Tait (1831–1901) F.R.S.E., Professor of Mathematics at the Queen's College, Belfast (1854–1860) and of Natural Philosophy at the University of Edinburgh (1860–1901), was one of the leading physicists and mathematicians in Europe in the nineteenth century. His expertise encompassed the breadth of physical science and mathematics. However, since the nineteenth century he has been unfortunately overlooked—overshadowed, perhaps, by the brilliance of his personal friends, James Clerk Maxwell (1831–1879), Sir William Rowan Hamilton (1805–1865) and William Thomson (1824–1907), later Lord Kelvin. Here I present the results of extensive research into the Tait family history. I explore the spiritual aspect of Tait's life in connection with The Unseen Universe (1875) which Tait co-authored with Balfour Stewart (1828–1887). I also reveal Tait's surprising involvement in statistics and give an account of his introduction to complex numbers, as a schoolboy at the Edinburgh Academy. A highlight of the thesis is a re-evaluation of C.-V. Mourey's 1828 work, La Vraie Théorie des quantités négatives et des quantités prétendues imaginaires, which I consider from the perspective of algebraic reform. The thesis also contains: (i) a transcription of an unpublished paper by Hamilton on the fundamental theorem of algebra which was inspired by Mourey and (ii) new biographical information on Mourey.

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