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Дисертації з теми "Raw earth materials"

Автор: Grafiati

Опубліковано: 25 січня 2025

Оновлено: 31 липня 2025

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1

Buratovic, Emma, Dervis Cocalic, Kasper Eliasson, Matilda Danestig, and Linus Everlid. "Controversial Materials : Ethical issues in the production of mineral based raw materials." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-327393.

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This report has investigated the ethical issues associated with mining or processing of materials that make them considered as controversial. For each material, the main areas of use and the top producing countries are analysed, followed by social and/or environmental issues as well as potential problems in the future. In total, 13 materials are discussed, of which most are minerals. The overall issues, that are recurring throughout the report and are important to be aware of are: child labor, low safety standards, mining activity resulting in deforestation or harming biodiversity, mining proc

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2

André, Axel. "Raw Material Consumption - Ett mått på Sveriges materialanvändning i ett mer resurseffektivt samhälle." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-367195.

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Att kunna mäta vår materialanvändning är centralt i omställningen till ett resurseffektivare samhälle och en cirkulär ekonomi. Inom EU används Domestic Material Consumption (DMC) som indikator för materialanvändning. Den beräknas genom att addera de material som ett land utvinner, plus de material som importeras, minus de material som exporteras. Det finns kritik mot DMC då den endast tar hänsyn till vikten på import- och exportprodukter då de korsar landsgränsen. DMC inkluderar inte de uppströms material som gått åt för att producera en produkt, men som inte syns i slutprodukten (den så kalla

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3

Farez, Younes. "Élaboration de matériaux à base de la terre crue destinés aux applications en travaux publics." Electronic Thesis or Diss., CY Cergy Paris Université, 2024. http://www.theses.fr/2024CYUN1328.

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Chaque année, des millions de tonnes de terre sont excavées sur les chantiers du BTP en France. Actuellement, ces terres sont majoritairement valorisées dans le secteur du bâtiment, sous forme d’éléments de remplissage (brique en terre comprimée, adobe, bauge…), tandis que leur usage reste limité dans le secteur des travaux publics.L’objectif de ce travail de recherche est de développer de nouveaux éco-matériaux à base de terre crue et de sédiments de dragage, destinés à certaines applications en travaux publics, comme les bordures de trottoir, les blocs lego ou les glissières de sécurité. Dif

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4

Kukkonen, Liv Linnea. "Transparent, rare earth doped, oxyfluoride glass-ceramics for photonics." Thesis, University of Sheffield, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340220.

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5

Cedervall, Johan. "Magnetic Materials for Cool Applications : Relations between Structure and Magnetism in Rare Earth Free Alloys." Doctoral thesis, Uppsala universitet, Institutionen för kemi - Ångström, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-331762.

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New and more efficient magnetic materials for energy applications are a big necessity for sustainable future. Whether the application is energy conversion or refrigeration, materials based on sustainable elements should be used, which discards all rare earth elements. For energy conversion, permanent magnets with high magnetisation and working temperature are needed whereas for refrigeration, the entropy difference between the non-magnetised and magnetised states should be large. For this reason, magnetic materials have been synthesised with high temperature methods and structurally and magnet

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6

Carleschi, Emanuela. "Electronic structure of transition metal and rare earth ions in complex materials by resonant core-level spectroscopies." Doctoral thesis, Università degli studi di Trieste, 2009. http://hdl.handle.net/10077/3061.

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2007/2008<br>In the course of this thesis I present an experimental investigation into various strongly correlated transition metal and rare earth compounds using core-level spectroscopic techniques, which have augmented the understanding of the electronic properties of these different systems. I will discuss the orbital occupation and the symmetry of the states near the Fermi level, responsible for the variety of ground states shown by a variety of strongly correlated systems such as misfit cobaltates, strontium ruthenates, metallic manganese and rare earth compounds.<br>XXI Ciclo<br>1978

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7

Cuccurullo, Alessia. "EARTH STABILISATION BY PLANT-DERIVED UREASE ENZYME FOR BUILDING APPLICATIONS." Thesis, Pau, 2019. https://tel.archives-ouvertes.fr/tel-03179295.

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Cette étude se concentre sur les performances hygro-mécaniques de la terre crue compactée comme matériau de construction alternatif aux matériaux de construction classiques à forte empreinte énergétique. Les briques en terre ont été fabriquées en appliquant des pressions de compactage élevées (jusqu’à 100 MPa, d’où la dénomination d’hyper-compactage) pour augmenter la densité du matériau et ainsi obtenir des propriétés mécaniques similaires à celles des matériaux de construction traditionnels tels que les briques cuites, les blocs de béton et la terre stabilisée. Une vaste campagne expérimenta

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8

Chirawatkul, Prae. "Structure of liquid and glassy materials from ambient to extreme conditions : a multiprobe approach." Thesis, University of Bath, 2010. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.537488.

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The structure of molten Au0.81Si0.19, Au0.72Ge0.28 and Ag0.74Ge0.26 alloys with a composition at or near to the eutectic was investigated by using neutron diffraction (ND). The results suggest that the Au-Au distance in the alloys is similar to that of liquid Au, there is a preference for Au-Si bonds and show that there are pre-peaks in the total structure factors for Au0.72Ge0.28 and Ag0.74Ge0.26 at 1.3(2) and 1.6(3) ˚, A−1 respectively. The asymptotic decay of the pair correlation functions was found to agree both with a theoretical prediction based on simple pair potentials and a fractal mo

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9

Pereira, Luciano Fabricio Dias. ""Estudo do campo hiperfino magnético na sonda de Ce colocada nos compostos intermetálicos do tipo RAg (R=Terra Rara) e do ordenamento magnético desses compostos usando cálculos de primeiros princípios"." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/85/85131/tde-28052007-141935/.

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Nesse trabalho foram estudados os compostos intermetalicos do tipo RAg (R = Nd, Gd e Ho) por calculos teoricos desenvolvidos dentro do formalismo da Teoria do Funcional Densidade (DFT). O metodo APW+lo (Augmented Planes Waves + lo- cal orbitals) foi aplicado para resolver a equacao de Kohn-Sham e a Aproximacao do Gradiente Generalizado (GGA) usada para tratar de forma aproximada o potencial de troca-correlacao. O codigo computacional utilizado foi o WIEN2k. As atividades foram focalizadas em duas frentes. Numa delas, determinou-se a fase magnetica do estado fundamental dos compos- tos HoAg e N

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10

Buzz, Lu La. "The states and status of clay : material, metamorphic and metaphorical values." Thesis, University of Plymouth, 2018. http://hdl.handle.net/10026.1/11639.

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This doctoral project combines a performance-led practice with contextual research in order to demonstrate how arts practice can challenge historical perceptions of clay and enhance its material status. The core knowledge deduced from this research is that embodied performance transforms connectivity between artist and clay and produces a unified incarnation of both elements. Through the use of immersive research methods I gained insights which could not have been predicted - particularly that my experiential performances were a process of ‘clay becoming’ in which I ultimately became the clay.

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11

Barta, Meredith Brooke. "Nanocomposite glass-ceramic scintillators for radiation spectroscopy." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45851.

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In recent years, the United States Departments of Homeland Security (DHS) and Customs and Border Protection (CBP) have been charged with the task of scanning every cargo container crossing domestic borders for illicit radioactive material. This is accomplished by using gamma-ray detection systems capable of discriminating between non-threatening radioisotopes, such as Cs-137, which is often used in nuclear medicine, and fissile material, such as U-238, that can be used to make nuclear weapons or "dirty" bombs. Scintillation detector systems, specifically thallium-doped sodium iodide (NaI(Tl))

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12

PACENTE, GIULIO. "ARCHITETTURA E INDUSTRIA 4.0 Smart manufacturing per la produzione di materiali innovativi in terra cruda." Doctoral thesis, Università degli studi della Basilicata, 2022. http://hdl.handle.net/11563/158388.

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The environmental issue has recently been central to national and international multidisciplinary debates. The term ecology, has given rise to green culture. Various intellectuals and artists since the first industrial revolution have been palpating the discomfort of what mechanized labor has entailed. Today, both the European Community and the UN set goals for safeguarding the planet and finding answers to the climate and environmental crisis. These issues become central strategies for design disciplines, and as designers we must not underestimate the contemporary condition but rather make it

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13

Leigh, Nigel Royston. "Specific heat measurements on chevrel phase materials exhibiting coexistence of superconductivity and magnetism." Thesis, Durham University, 2001. http://etheses.dur.ac.uk/3849/.

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A probe for measuring the specific heat of superconductors at low temperatures and in high magnetic fields has been built and commissioned. The probe has been tested using the relaxation method on samples of copper and the accuracy of the data is 1.3 % between 5 K and 30 K, data taken using the long range pulse method has a resolution of 10 mK. Specific heat measurements have been performed on members of the series (Pb(_1)-(_x))Cu(_1.8x)Mo(_6)S(_8), (Sn(_1-x))Eu(_x)Mo(_6)S(_8) and (Pb(_1-x)M(_x))Mo(_6)S(_8) where M = Gd and Eu, from 3 K up to 30 K and in magnetic fields up to 15 T. Additional

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14

PEREIRA, LUCIANO F. D. "Estudo do campo hiperfino magnético na sonda de Ce colocada nos compostos intermetálicos do tipo Rag(R=terra rara) e do ordenamento magnético desses compostos usando cálculos de primeiros princípios." reponame:Repositório Institucional do IPEN, 2006. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11444.

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Made available in DSpace on 2014-10-09T12:51:59Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:07:05Z (GMT). No. of bitstreams: 0<br>Dissertação (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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15

FERREIRA, ELINER A. "Estudo da hidrogenação para pulverização de ligas à base de terras raras com Nb para eletrodos de hidreto metálico." reponame:Repositório Institucional do IPEN, 2013. http://repositorio.ipen.br:8080/xmlui/handle/123456789/26390.

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Submitted by Claudinei Pracidelli (cpracide@ipen.br) on 2016-06-22T13:51:24Z No. of bitstreams: 0<br>Made available in DSpace on 2016-06-22T13:51:24Z (GMT). No. of bitstreams: 0<br>Tese (Doutorado em Tecnologia Nuclear)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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16

FERNANDES, STELA M. de C. "Influencia de terras-raras sobre a oxidacao de ligas formadoras de cromia." reponame:Repositório Institucional do IPEN, 1999. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10780.

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Made available in DSpace on 2014-10-09T12:43:55Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:08:49Z (GMT). No. of bitstreams: 1 06768.pdf: 7929582 bytes, checksum: 40b065a53d2b28d5924616b854124430 (MD5)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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17

RANIERI, IZILDA M. "Crescimento de cristais de LiY sub(1-x) TR sub(x) F sub(4):Nd (TR=Lu ou Gd) para aplicacoes opticas." reponame:Repositório Institucional do IPEN, 2001. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10935.

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Made available in DSpace on 2014-10-09T12:45:47Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:07:17Z (GMT). No. of bitstreams: 1 07149.pdf: 7899411 bytes, checksum: 6ba368602f98f29e9401ef54276cdb45 (MD5)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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18

BONTURIM, EVERTON. "Controle de propriedades multiferroicas em filmes finos óxidos dopados com íons terras raras para aplicação como dispositivos lógicos e de memória." reponame:Repositório Institucional do IPEN, 2017. http://repositorio.ipen.br:8080/xmlui/handle/123456789/28033.

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Submitted by Pedro Silva Filho (pfsilva@ipen.br) on 2017-11-22T14:03:18Z No. of bitstreams: 0<br>Made available in DSpace on 2017-11-22T14:03:18Z (GMT). No. of bitstreams: 0<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>Nas últimas décadas, o consumo de dispositivos eletrônicos e a alta demanda por armazenamento de dados tem mostrado grandes oportunidades para a criação de novas tecnologias que garantam as necessidades mundiais na área de computação e desenvolvimento. Alguns materiais multiferr

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19

Brito, Neto Francisco Maciel de, and 92-98270-0137. "Síntese de Ortoniobatos de Samário (SmNbO4) polimórficos por moagem de alta energia." Universidade Federal do Amazonas, 2018. https://tede.ufam.edu.br/handle/tede/6532.

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Submitted by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2018-08-06T15:17:49Z No. of bitstreams: 1 DISSERTAÇÃO-Francisco Maciel de Brito Neto PPGCEM.pdf: 4657821 bytes, checksum: bfb975014ce10e6a646fdd1c54e9758b (MD5)<br>Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2018-08-06T15:18:13Z (GMT) No. of bitstreams: 1 DISSERTAÇÃO-Francisco Maciel de Brito Neto PPGCEM.pdf: 4657821 bytes, checksum: bfb975014ce10e6a646fdd1c54e9758b (MD5)<br>Made available in DSpace on 2018-08-06T15:18:13Z (GMT). No. of bitstreams: 1 D

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20

Mayer, Charlotte. "Nouveaux matériaux magnétocaloriques à base de terres rares pour la réfrigération magnétique." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2011. http://tel.archives-ouvertes.fr/tel-00649399.

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Les travaux présentés dans ce manuscrit portent sur la synthèse et la caractérisation de nouveaux matériaux magnétocaloriques à basse de terres rares pour la réfrigération magnétique. Le premier chapitre constitue une introduction aux notions d'effet magnétocalorique et de réfrigération magnétique et dresse un état de l'art des matériaux magnétocaloriques existants. Dans le but d'obtenir des matériaux à forte capacité de réfrigération (RC) et d'identifier des stratégies d'amélioration de ce critère de performance, deux voies de recherche ont été explorées : l'élargissement de la transition mag

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21

Kinuthia, Wanyee. "“Accumulation by Dispossession” by the Global Extractive Industry: The Case of Canada." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/30170.

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This thesis draws on David Harvey’s concept of “accumulation by dispossession” and an international political economy (IPE) approach centred on the institutional arrangements and power structures that privilege certain actors and values, in order to critique current capitalist practices of primitive accumulation by the global corporate extractive industry. The thesis examines how accumulation by dispossession by the global extractive industry is facilitated by the “free entry” or “free mining” principle. It does so by focusing on Canada as a leader in the global extractive industry and the spr

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22

Costa, Inês Filipa da Mota. "Sorption properties of biobased and raw earth materials: investigation of temperature and dry mass measurements." Master's thesis, 2017. http://hdl.handle.net/10362/34366.

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Relative humidity influence strongly the indoor air quality and human comfort. Therefore, the hygrothermal behaviour of building materials is an important parameter and there has been a growing interest in studying passive solutions to regulate the indoor relative humidity. Since earth materials have the ability to absorb and release water vapour, they can be used to moderate the amplitude of indoor relative humidity and therefore to improve the indoor air quality and consequently save energy. Many researchers have been focussed on studying the hygrothermal properties of earth building materi

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23

White, Shalena Bethany. "Humble alchemy." Thesis, 2014. http://hdl.handle.net/2152/26414.

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This master's report addresses the conceptual and material investigations that were explored within my artistic research made at the University of Texas at Austin between 2011 and 2014. These works are a confluence of adornment, sculpture and installation art. These pieces incorporate ancient and contemporary metalworking techniques with raw, organic material. The notion of elegant ornamentation is expanded beyond the body into the adornment of architecture. The potential for transformation and reinvention within found elements is explored within this work. The natural resources I work with h

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24

Kabongo, Guy Leba. "Luminescence investigation of zinc oxide nanoparticles doped with rare earth ions." Diss., 2013. http://hdl.handle.net/10500/14191.

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Un-doped, Tb3+ as well as Yb3+ doped ZnO nanocrystals with different concentrations of RE3+ (Tb3+, Yb3+) ions were successfully synthesized via sol-gel method to produce rare earth activated zinc oxide nanophosphors. The phosphor powders were produced by drying the precursor gels at 200˚C in ambient air. Based on the X-ray diffraction results, it was found that the pure and RE3+ doped ZnO nanophosphors were highly polycrystalline in nature regardless of the incorporation of Tb3+ or Yb3+ ions. Moreover, the diffraction patterns were all indexed to the ZnO Hexagonal wurtzite structure and belon

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25

Raekers, Michael. "An x-ray spectroscopic study of novel materials for electronic applications." Doctoral thesis, 2009. https://repositorium.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-2009061010.

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The electronic and magnetic structure of the colossal magneto resistance material La1-xSrxMnO3, the high-k and strain tailoring compounds REScO3 (Sm, Gd, Dy) and the multiferroic LuFe2O4 was investigated by means of x-ray spectroscopic techniques. SQUID measurements of La1-xSrxMnO3 (x = 0.125, 0.17, 0.36) were compared with XMCD results. The very good agreement between these two experiments proofs the applicability of the correction factor for the spin magnetic moment and the importance of charge transfer. The magnetic moment measured by SQUID and that determined from XMCD proofs that the mag

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26

Talane, Tsholo Ernest. "Study of Structural and Optical Properties of Undoped and Rare Earth Doped TiO2 Nanostructures." Diss., 2017. http://hdl.handle.net/10500/24901.

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Un-doped, Er3+ doped (TiO2:Er3+) as well as Er3+/Yb3+ co-doped (TiO2:Er3+/Yb3+) nanocrystals with different concentrations of RE3+ (Er3+, Yb3+) were successfully synthesized using the sol-gel method. The powder X-ray diffraction (XRD) spectra revealed that all undoped and doped samples remained in anatase after annealing at 400°C. The presence of RE3+ ions in the TiO2 host lattice was confirmed by conducting elemental mapping on the samples using Scanning electron microscope (SEM) equipped with energy dispersive X-ray spectrometer (EDX), which was in agreement with X-ray photoelectron spectro

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27

Wang, Huan-Yun, and 王奐筠. "The Studyon Dispute Settlement Body Reports of Raw Material Case and Rare Earth Case and their Implications to the Compliance of People's Republic of China’s Energy Conservation and other regulations with the WTO Covered Agreements." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/tccadu.

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碩士<br>國立東華大學<br>財經法律研究所<br>102<br>China plays an important role of rare earth producer. From the Panel procedure of dispute settlement mechanism, they have not eliminated quantitative restriction regulations, even losing law suit of the Appellate Body procedure. After the Raw Material Case, in fact, dispute settlement mechanism has not solved the similar restrictive measure as result of Rare Earth Cases. From cases of Raw Material and Rare Earth, the issues in action are consisting of two sections: China's Protocol of Accession (Working Party Report included) and GATT. From China's Protocol of

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