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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.
191

Les carrières de meules du sud de la péninsule ibérique, de la protohistoire à l'époque moderne / Millstone quarries in the south of the Iberian peninsula from Protohistory to Modern Times

Anderson, Timothy J. 11 December 2013 (has links)
Les moulins avec leurs meules en pierre ont été utilisés depuis les débuts de l'agriculture pour moudre de céréales. Au fil du temps, ils ont évolué passant des moulins va-et-vient, aux moulins rotatifs manuels, puis à des moulins à mécanismes complexes entrainés par l'homme, l'animal, l'eau ou le vent. Notre étude porte sur la question de la production de ces meules dans le sud de l'Espagne depuis le troisième millénaire av. J.-C. jusqu'au XXe siècle. Seuls quelques sites étaient signalés au début de notre recherche. Maintenant, plus de 130 meulières sont connues suite à des travaux de terrain, l'étude des textes anciens, des recherches sur l'internet et des études museographiques. Les sources conventionnelles pour identifier les sites sont des archives et des textes historiques, ainsi que des dictionnaires géographiques, notamment du XIXe siècle. La plupart des sites identifiés par ces sources datent de périodes récentes. Des sites plus anciens, datés de l'époque romaine et du moyen âge, ont été identifiés par des études des meules dans les dépôts des musées (ébauches en particulier) combinées avec des recherches sur le terrain. L'internet peut être aussi une source intéressante. De nombreux sites sont signalés le long des sentiers de randonnée ou dans des pages historiques locales. Une partie de ce travail a été consacré à établir une première classification des différents types de meules. En raison de l'absence de corpus publiés, ce travail n'est pas équivalent pour toutes les périodes, en particulier pour le Moyen Age. Toutes les roches n'étaient pas aptes à la fabrication des meules et certaines étaient plus recherchées que d'autres. Ainsi à l'âge du fer c'était le calcaire tuffeau. Alors qu'à l'époque romaine c'était le biocalcarenite de la bordure de la Baie de Cadix, et les roches volcaniques qui ont été importées, parfois sur de longues distances depuis les deux districts volcaniques (Calatrava et Province volcanique du SE). Dans les périodes plus récentes c'est le calcaires blanc qui a été favorisés, peut-être parce qu'il permettait d'obtenir une farine plus blanche. Après avoir décrit des techniques de fabrication, une classification des meulières (MQ) est proposée selon s'il s'agissait d'exploitation de blocs de surface (MQ-1) ou du substrat rocheux (MQ-2). Les meules va-et-vient étaient surtout produites à partir de blocs de surface (MQ-1a), tandis que des modèles de l'âge du fer et romains provenaient de carrières de blocs (MQ- 2b). L'extraction directe (MQ-2a) où des cylindres ont été tirés de la roche laissant des fronts alvéolaires datent d'époque romaine. Des gros blocs de surface (calcaires karstiques, rochers de granit) ont servi également comme meulières (MQ-1b). Les carrières sont décrites sur la base de leur morphologie : en pallier, en poche, en fosse, de bordure, en tranchée, extensive contigües, extensives dispersées et souterraines. Des thèmes liés à l'infrastructure des meulières sont traités, tels que la maintenance des outils, la gestion des déchets, et le transport des meules (courte et à longue distance). Les meuliers sont également étudiés du point de vue de leur degré de spécialité, leur organisation en équipes, leurs gains et leurs risques professionnels (silicose). Quant à la question de la propriété et de leur contrôle, il est démontré que ces sites au moins depuis le Moyen Age étaient sous l'autorité de la classe dirigeante. A l'origine, la production était surtout locale et régionale. Les meules ont commencé à être diffusées à de longues distances à l'époque romaine. Au Moyen Age, avec l'abandon de roches volcaniques, il y a eu un retour aux roches locales et régionales. L'introduction des pierres silicieuse françaises au XIXe siècle fut le début de la fin des meulières en Espagne. Le coup de grâce, cependant, est arrivé avec l'introduction du rouleau en acier industriel, qui non seulement a engendré la fin des meulières, mais aussi de la longue tradition de mouture à la pierre. / Mills with stones were used since the beginnings of agriculture for grinding grains. Over time, they evolved from saddle querns, to rotary querns and mills, to the more sophisticated geared watermills, and windmills. Our study focuses on where and how the hard, abrasive millstones that equipped the different mills were produced in the south of Spain, from the third millennium BC to the 20th century. At the outset of our research, only a few millstone quarries were known. Now, more than 130 have been identified. Different sources were used to identify these sites. Conventional sources included old historical archives and texts, notably 19th-century geographical dictionaries. Most sites recorded in written sources, however, date to recent times. Older quarries, from the Roman period and Middle Ages, however, were identified by millstone analyses in museum depositories (roughouts in particular) combined with fieldwork. An additional source was the internet. Ignored by conventional sources, many sites are recorded along hiking trails or in local historical websites. A large section of this research is dedicated to establishing a first chrono-typological classification of the different types of millstones produced in these quarries. Due to the lack of published millstone assemblages, this work is not balanced, especially regarding the Middle Ages. Not all rocks were apt for grinding and there is evidence that specific rocks were favoured over others. In the Iron Age limestone tufa was preferred. In Roman times, biocalcarenites were the main rock along the Bay of Cádiz, whereas volcanics rocks, dominating the eastern half of our study area, travelled, at times, long distances from the two volcanic districts (Calatrava and SE Spanish volcanics). In more recent periods white limestones were favoured, possibly because they yielded a whiter flour. After describing extraction and fashioning techniques and tools, a classification of these quarries (MQ) is proposed based on whether the exploitation was of surface boulders (MQ-1) or bedrock (MQ-2). Saddle querns were mostly from surface workings (MQ-1a), whereas Iron Age and Roman models were fashioned from detached angular blocks (MQ-2b). True extractive quarries (MQ-2a) where cylinders were cut directly from bedrock yielding circular hollows, date to Roman times. There are also evidence of large surface blocks (karstic limestones, granite boulders) as extractive quarries (MQ-1b). Based on their morphology, the sites are labelled as follows: bench, pocket, pit, edge, trench, extensive contiguous, extensive dispersed and subterranean. In this study we have also examined subjects linked to millstone quarry infrastructure, such as tool maintenance, debris management, and millstone transport (both short and long distance). We have also examined the personel working at these sites from the point of view of their degree of specialty, organisation of crews, earnings and occupational hazards (notably silicosis). As to the subject of quarry ownership and control, there is evidence of vested interest of local authorities at least from the Middle Ages. Millstone production through time was for the most part local and regional. Only in Roman times did millstones travel systematically long distances. In the Middle Ages, with the abandonment of volcanic rocks, there was a return to the local and regional rocks. The introduction of the French silicieuse stones in the 19th century was the beginning of the end of millstone production in Spain. The coup de grâce, however, arrived with the introduction of the industrial steel roller, that not only terminated quarry work but ended the long tradition of milling with stones.
192

Charakteristika inženýrskogeologických poměrů průmyslového areálu společnosti SYNTHOS a.s. v Kralupech nad Vltavou / Characterization of engineering geological conditions of industrial area of the Synthos company in Kralupy nad Vltavou

Studenec, Ján January 2017 (has links)
In my diploma thesis, I concern with the detailed geological model of the base of the industrial complex in Kralupy nad Vltavou and the surrounding area. I have collected all available data from geology, engineering, geology, hydrogeology and geophysics. I created a database and using the autoCAD civil3D software and knowledge from the research part of this work I created a 3D model of interest area. From this model, I created maps and characteristic profiles. Based on archival research and created profiles, I reviewed the foundation basement of the most important buildings. My work provides complete geological information of this territory within 60 meters supported by all available surveys by 2016.
193

Lithofazieskarten Tertiär Lausitz 1 : 50.000 (LKT50 Lausitz): Neukartierung der Lithofazies- / Horizontkarten Tertiär i. M. 1 : 50.000 für die sächsische Lausitz (LKT50 Lausitz)

Escher, Dieter, Gerschel, Henny, Geißler, Marion, Hartmann, Anja, Rascher, Jochen, Rascher, Matthias, Richter, Lina, Wittwer, Stephanie, Pfeiffer, Nora, Standke, Gerda, Blumenstengel, Horst 27 October 2021 (has links)
Die Broschüre enthält die Erläuterungen zu den Lithofazieskarten Tertiär Lausitz 1 : 50.000. Darin werden die tertiären Formationen und Subformationen der Lausitz ausführlich beschrieben. Die als Anlagen aufgeführten Kartendaten werden auf der Internetseite des LfULG unter der Rubrik „Geologie – Digitale Geologische Karten“ bereitgestellt. Die Veröffentlichung richtet sich an alle geowissenschaftlich arbeitenden und interessierten Firmen, Behörden, Gesellschaften, Vereine, Verbände, Privatpersonen usw. Redaktionsschluss: 13.10.2020
194

Měření přesné opakované nivelace na polygonu Tetčice / The precise repeated leveling measurements at Tetčice polygon

Staněk, Antonín January 2014 (has links)
The diploma thesis deals with monitoring vertical shifts in the village Tetčice, located at the contact of two geological units in Boskovice furrow. The theoretical part describes the geological structure of the site and the technology high-precision levelling. It also includes measuring and graphic processing, including follow-up on results of previous stages.
195

Motivace studentů středních škol ke studiu geologie prostřednictvím korespondenčního semináře / A correspondence seminar as a motivation for secondary school students to study Geology

Teliščaková, Martina January 2013 (has links)
Master thesis is focused on how to promote secondary school students' interest in the next study of Geology as a subject of their future professional specialization. The convenient motivational tool seems to be the use of special correspondence seminar to gain and expand their knowledge. Experimental part of this thesis consists of the application the correspondence seminars through the current communication media (e.g. web portal or social network), directly in secondary schools. The results are statistically analysed and evaluated by a questionnaire at the model secondary school. Key words: motivation, Geology, correspondence seminar, secondary school, questionnaire
196

Kontaminace pitní vody arsenem a borem v Peru - původ, vlastnosti a řešení / Contamination of Peruvian drinking water by arsenic and boron - origin, properties and treatment

Sadloň, Matúš January 2020 (has links)
Excessive arsenic and boron concentrations determined in natural waters within the Department of Tacna in southern Peru are associated with active Andean volcanism, being further exacerbated by the ongoing mining activity in the area. Both arsenic and boron concentrations at five investigated sites significantly exceed the maximum permissible limits determined by the World Health Organisation and the Peruvian legislation for drinking water, thus affecting the health and wellbeing of the local population. Due to the remoteness of the area of interest, which lacks infrastructure, skilled human resources as well as capital, Photon Water Technology s.r.o. has come up with a solution based on the use of small water treatment plants operating on the principle of reverse osmosis in combination with a commercial remediation product Katalox Light® . This product enables the formation of alkaline conditions needed for proper complexation of boron into B(OH)4 - (aq), which is better remediated by the proposed technology. Reverse osmosis can remediate arsenic, although the efficiency of As removal depends on the chemical composition of natural waters at the investigated sites. Laboratory experiments have been focused to prove the viability of Katalox Light® for enhancing the rate of boron removal within the designed...
197

Náučná stezka povodím Blažejovického potoka / Education trail along "Blažejovický potok" brook

Neubauerová, Kristýna January 2010 (has links)
This thesis deals with the characteristic of the Vysočina region and with a project of founding an educational natural trail "Povodím Blažejovického potoka". The thesis consists two parts. The first theoretic part describes the Vysočina region in light of geomorphological, biological, geological, natur protection and in which chapter is emphasization the area, in which is situated the lane of educational trail. It is compilatory text, which is composion like guide book to the Vysočina region for teachers, who decide for visit with their students not only this education trail, but another places in the Vysočina region too. They can find in the text another interesting places to visit. On the end of theoretic part are two chapters, historical interests and explication the concept of the education trail. The second, practical part include individual information boards with thematic content and their graphic layout. The education trail has 7 km with 12 information boards. It is the combination education trail, it has 1 introductory board, 3 boards with historical informations, 1 geological board, 2 botanical board, 1 zoological board, 2 ecological boards and 1 board about technical memory. The education trail goes on well walkable terrain along the metalled road. It started at Rachyně, throught Blažejovice and...
198

Key Competencies Under One Roof

January 2011 (has links)
The brochure informs of the varied tasks, the locations and the structure of the Saxon State Office for Environment, Agriculture and Geology.
199

Erdbebenbeobachtung im Freistaat Sachsen : Dreijahresbericht

Buchholz, Petra, Korn, Michael, Wendt, Siegfried, Funke, Sigward, Hänel, Falk, Mittag, Reinhard, Burghardt, Thomas, Rappsilber, Ivo, Wallner, Olaf, Krentz, Ottomar, Witthauer, Brunhild, Novak, Elke January 2011 (has links)
Der Bericht dokumentiert Ort, Datum, Magnitude und Tiefe der Erdbeben in Sachsen über einen Zeitraum von drei Jahren. Bei der Auswertung der Registrierungen werden zusätzlich zu den Online-Stationen des seismologischen Sachsennetzes auch die Stationen der Nachbarländer einbezogen, deren Standorte in der Veröffentlichung dargestellt sind. Ein besonderes Ereignis stellt dabei der Erdbebenschwarm von Oktober bis Dezember 2008 dar. Das Kapitel »Induzierte Seismizität« befasst sich mit den Untersuchungen zur bergbauinduzierten Seismizität der Uranerzgrube Schlema-Alberoda und zur Böschungsbewegung des ehemaligen Braunkohletagebaues Nachterstedt.
200

Das digitale Bewertungsverfahren für Rohstoffe Sachsens

Imkamp, Ines, Kalies, Heiko, Lehmann, Torsten, Künne, Gudrun, Escher, Dieter, Rascher, Jochen, Kleeberg, Katrin, Brauer, Rainer 31 July 2012 (has links)
Der Bericht beschreibt ein neues, flexibles und deutschlandweit einmaliges Bewertungsinstrument für die Rohstoffe Steine und Erden sowie Braunkohle. Es ermöglicht, die sächsischen Braunkohlen nach unterschiedlichen Kriterien miteinander zu vergleichen und ihre Eignung für eine stoffliche Veredlung oder eine energetische Nutzung zu beurteilen. Mit Hilfe der Rohstoffbewertung können die Bau- und Sicherungswürdigkeit von Steine- und Erden sowie Braunkohlenvorkommen berechnet und kartografisch dargestellt werden. Durch die Variabilität der Bewertungsparameter und durch räumliche Auswahlmöglichkeiten sind verschiedene Betrachtungsvarianten möglich.

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