Dans cette thèse, nous étudions la géométrie analytique p-adique et la cohomologie l-adique de certains espaces de Rapoport-Zink, en utilisant la théorie des filtrations de Harder-Narasimhan des schémas en groupes finis et plats élaborée par Fargues.Cette thèse se compose de trois parties. La première partie traite de certains espaces de Rapoport-Zink non-basiques, qui satisfont à la condition que leur polygone de Newton et polygone de Hodge ont un point de contact non-trivial, qui est un point de rupture pour le polygone de Newton. Sous cette hypothèse, nous prouvons que ces espaces de Rapoport-Zink peuvent être décomposés en une somme directe d'espaces de modules des types de Rapoport-Zink associés à certains sous-groupes paraboliques appropriés, donc leurs cohomologie l-adique sont des induites paraboliques et en particulier ne contiennent pas de représentations supercuspidales. Nous prouvons ces faits en démontrant d'abord un théorème sur la filtration de Hodge-Newton pour les groupes p-divisibles avec des structures additionelles sur des anneaux de valuation complets de rang un et de caractéristique mixte (0,p).Dans la deuxième partie, nous considérons les espaces de Rapoport-Zink basiques de signature (1,n-1) pour les groupes unitaires associés à l'extension quadratique non ramifiée de Qp. On étudie l'action de Hecke sur ces espaces en détails. En utilisant la théorie des filtrations de Harder-Narasimhan des schémas en groupes finis et plats, et la stratification de Bruhat-Tits de la fibre spéciale réduite Mred étudié par Vollaard-Wedhorn, on trouve un certain domaine analytique compact DK telle que ses itérés dans le groupe G(Qp)×Jb(Qp) forme un recouvrement localement fini de tout l'espace MK. Nous appelons un tel phénomène une décomposition cellulaire localement finie.Dans la troisième partie, nous démontrons une formule de Lefschetz pour ces espaces pour l'action des éléments semi-simples réguliers elliptiques, en tenant compte de l'action de ces éléments sur les cellules et en appliquant le théorème principal de Mieda. De la même manière, nous pouvons aussi reprouver la formule de Lefschetz pour les espaces de Lubin-Tate précédemment obtenue par Strauch et Mieda. Cette formule de Lefschetz devrait caractériser la réalisation de correspondances de Jacquet-Langlands locales pour les groupes unitaires dans la cohomologie l-adique de ces espaces de Rapoport-Zink, dès que certains problèmes correspondants de théorie des représentations auront été résolus. / In this thesis we study p-adic analytic geometry and l-adic cohomology of some Rapoport-Zink spaces, using the theory of Harder-Narasimhan filtration of finite flat group schemes developed by Fargues .This thesis consists of three parts. The first part deals with some non-basic Rapoport-Zink spaces, which satisfy the condition that their Newton polygon and Hodge polygon have a non-trivial contact point, which is a breakpoint for the Newton polygon. Under this hypothesis, we prove these Rapoport-Zink spaces can be decomposed as a direct sum of smaller Rapoport-Zink spaces associated to some suitable parabolic subgroups, thus their l-adic cohomology is parabolically induced and in particular contain no supercuspidal representations. We prove these facts by first proving a theorem about the Hodge-Newton filtration for p-divisible groups with additional structures over complete valuation rings of rank one and mixed characteristic (0,p).In the second part, we consider the basic Rapoport-Zink spaces with signature (1,n-1) for the unitary groups associated to the unramified quadratic extension of Qp. We study the Hecke action on these spaces in details. By using the theory of Harder-Narasimhan filtrations of finite flat group schemes, and the Bruhat-Tits stratification of the reduced special fiber Mred studied by Vollaard-Wedhorn, we find some compact analytic domain DK such that its translates under the group G(Qp)×Jb(Qp) form a locally finite cover of the whole space MK. We call such a phenomenon a locally finite cell decomposition.In the third part we prove a Lefschetz trace formula for these spaces for the action of regular semi-simple elliptic elements, by considering the action of these elements on the cells and applying Mieda's main theorem. In the same way we can also reprove the Lefschetz trace formula for Lubin-Tate spaces as previously obtained by Strauch and by Mieda. This Lefschetz trace formula should characterize the realization of local Jacquet-Langlands correspondences for unitary groups in the l-adic cohomology of these Rapoport-Zink spaces, as soon as some corresponding representation theoretic problems are solved.

Ziel der durchgeführten Arbeiten war, verschiedene Oxide mit elektrochemischen Methoden in eine Zinkschicht einzubauen. Um den Mechanismus der Dispersionsabscheidung aufzuklären wurden die Feststoffpartikeln durch Zetapotentialmessungen, Partikelgrößenanalyse und die Bestimmung der spezifischen Oberfläche charakterisiert. Außerdem wurde die Abhängigkeit der Partikel-Einbaurate in den abgeschiedenen Zinkschichten von der Art des Bades, der Partikelkonzentration im Bad, der Rührgeschwindigkeit, dem pH-Wert, der Mahlung der Partikeln, der Art des elektrischen Stromes und der Elektrodenanordnung untersucht. Der Anteil an Oxiden in den Zinkschichten wurde mit verschiedenen Meßmethoden analysiert. Die optimierten Dispersionsschichten sind durch verschiedene Methoden charakterisiert worden.

Diese Arbeit berichtet über die Planung und den Aufbau eines neuen Viskosimeters und über Viskositätsuntersuchungen einiger metallischer Systeme. Diese letzteren Messungen wurden mit einem vorhandenen Viskosimeter gemacht, in dem kein besseres Vakuum als 10^(-3)mbar und keine höhere Temperatur als 1430K erreicht werden kann. Das beste Vakuum und die maximale erreichbare Temperatur in dem neuen Viskosimeter sind 10^(-6)mbar bzw. 1870K. Diese beiden Grundbedingungen ermöglichen die Viskositätsmessung metallischer Systeme, die aktive Elemente wie Al, Mg und P enthalten oder/und einen höheren Schmelzpunkt besitzen. Mit dem Drei-Zonen-Ofen erlaubt die neue Apparatur auch ein schnelleres Homogenisieren der zu untersuchenden Schmelze, besonders der monotektischen Systeme. Der Einfluß der Temperatur des Torsionsdrahtes und der Anfangsphase der Schwingung auf die Genauigkeit der Viskostätsmessung wurden analysiert und entsprechende Verbesserungen vorgeschlagen. Die untersuchten Systeme sind das Zn-Pb basierte ternäre System, die monotektischen Systeme Ag-Te und Li-Na, das Verbindungssystem Sb-Zn, die halbleitenden Cd-Te Legierungen und Schaummaterialien ZACT und ZACM. / Viscosity of metallic melts and its precise measurement This thesis reports the design and the construction of a new oscillating cup viscometer and the viscosity investigation of several metallic systems. The measurements were carried out with an existing viscometer by which one could not get better vacuum than 10^(-3)mbar or higher temperature than 1430K. With the new apparatus the best vacuum of 10^(-6)mbar and the highest temperature of 1870K can be reached. These two basic conditions permit the measurement of systems which contain active elements such as Al, Mg and P and/or have very hight melting points. The construction of the three-zone furnace in the new viscometer allows the acceleration of the homogenising process, which is especially important for monotectic systems. The influences of the temperature of the torsion thread and the initial oscillating phase on the accuracy of viscosity measurement were analysed and the corresponding solutions were put forward. The investigated systems are the Zn-Pb based ternary system, the monotectic systems Ag-Te and Li-Na, the Sb-Zn system which contains compounds in the solid phases, the semiconducting Cd-Te alloys and the foaming materials ZACT and ZACM.

No description available.

Thesis advisor: Benjamin Howard / This dissertation gives a description of the GL(4) Rapoport-Zink space, including the connected components, irreducible components, intersection behavior of the irreducible components, and Ekedahl-Oort stratification. As an application of this, this dissertation also includes a description of the supersingular locus of the Shimura variety for the group GU(2,2) over a prime split in the relevant imaginary quadratic field. / Thesis (PhD) — Boston College, 2019. / Submitted to: Boston College. Graduate School of Arts and Sciences. / Discipline: Mathematics.

Soit \M un espace de modules de groupes p-divisibles introduit par Rapoport et Zink. Supposons que cet espace \M soit non-ramifié de type EL ou PEL unitaire ou symplectique. Soit \Mrig la fibre générique de Berthelot de \M. C'est un espace rigide analytique au-dessus duquel il existe une tour de revêtements étales finis (\M_K)_K qui classifient les structures de niveau. On définit un morphisme déterminant \det_K de la tour (\M_K)_K vers une tour d'espaces rigides analytiques étales de dimension 0 associée au cocentre du groupe réductif relié à cet espace. C'est un analogue local en des places non-archimédiennes du morphisme déterminant pour les variétés de Shimura défini par Deligne. Comme pour les variétés de Shimura, on montre que les fibres géométriques du morphisme déterminant \det_K sont les composantes connexes géométriques de \M_K. On définit aussi les morphismes puissances extérieures qui généralisent le morphisme déterminant sur la tour d'espaces rigides analytiques associée à un espace de Lubin-Tate.

<p>Förorenade områden kan utgöra en stor risk för den omgivande miljön. Föroreningar som tungmetaller kan påverka det mikrobiologiska livet samt genom urlakning föras ut i grundvatten och vidare förorena omgivande miljö och dricksvatten. Tungmetaller tas även upp i organismer och sprids vidare i näringskedjor och kan också nå människan genom föda som växer eller odlas på förorenad mark. Föroreningar i mark härstammar oftast från gammal industriell produktion, så även i och omkring samhället Gusum i Östergötland. Här har verksamhet med smältverk bedrivits sedan 60-talet och ända fram till början av 80-talet var rökgaserna från verket orenade från metaller och har kraftigt förorenat och skadat närområdet kring bruket. </p><p>Syftet med detta arbete är att undersöka hur allvarligt förorenat området kring bruket är av metallerna koppar och zink, samt om metallerna riskerar att spridas ned i markprofilen och om denna risk förefaller öka ju högre halter marken har utsatts för. Information om området har samlats in och provtagningar i marken har genomförts på två olika avstånd från bruket. Provtagningarna omfattade totalt 8 st provgropar, 4 st på vardera provtagningsplats. Proverna har tagits från 4 olika djup i varje enskild grop. </p><p>Resultaten av studien visar att tillståndet i marken är allvarligt till mycket allvarligt enligt Naturvårdsverkets bedömningsgrunder för förorenad mark. Vidare visar mätningarna att det mesta av metallföroreningarna är bundet i markens organiska lager. Metallkoncentrationen i markens övre skikt verkar ha liten betydelse i detta fall för spridningen nedåt i markprofilen och spridningen sker mycket långsamt.</p>

<h1>Abstract</h1><p>At Saltvikens copperindustry, which is located in the municipality of Oskarshamn, copper was refined from sulphiteore some hundred years ago. The ore underwent several steps in the process before the final product was received. These steps all had an influence on the environment through discharge of heavy metals. The area where the copper industry was located is today considered to be of specific national interest due to its valuable nature and cultural values, as well as its value for recreational outdoor activities. Therefore, it is important to determine the present level of contamination and if any transport of contaminants have occurred, and to identify the risks that are associated with the site both at present and in a longer time perspective.</p><p>Thirtynine soil samples and 16 sediment samples have been analyzed. All samples have undergone two different leaching procedures before the analyis; one with nitric acid for determination of total concentration and one with acidic acid to analyze the plant available part. The analysis was perfomed through Atomicabsorptionsspectrofotometry. In addition, pH and loss on ignition have been measured on all samples. The chemical values were then compared to reference values in order to establish the level of contamination. Within the risk assessment framework where then also a exposure modelling conducted. This was made both for an average exposure situation, and for a reasonable maximum exposure. For both these scenarios, one calculation was made based on the soil use of today and one was made based on an assumed future usage of the area for establishment of residential buildings.</p><p>The results show that both the land area and sediment have been affected by the copper industry. From 48 sediment samples, 46 generated concentrations above the assumed effect level levels given by the Swedish Environmental Protection Agency. The results also indicated that a significant contaminant transport has occurred, and is still occurring. This is supported by high metal concentrations in deep soil layers and by high concentrations in the sediment. The condition is considered to be very much serious in the case of copper and zinc and serious to less serious for lead, depending on the ground use. Some of the metals are very easy to leach and can thus contaminate adjacent areas for a long time.</p><p>Already at the present ground use, there is a risk for children to become exposed to  zinc and lead in doses that can generate negative health effects. At the potential future ground use the TDI for both copper, zinc and lead will be exceeded if a child is exposed. For adults, however, the TDI value for zinc and lead is exceeded only in the scenario with the potential future ground use.</p>

Gästrike Vatten är ett kommunalägt driftbolag bildat 2008. Bolaget har avloppsreningsverk i Gävle, Hofors, Ockelbo och Älvkarleby kommuner som tillsammans renar avloppsvatten från cirka 120 000 personer. Totalt producerar Gästrike Vatten cirka 11 000 ton slam per år som renderar en total kostnad om 5 000 000 kr. Med anledning av riksdagens uppsatta miljömål om återföring av 60 % av fosforn till produktiv mark vill Gästrike Vatten undersöka hur deras avsättningsmöjligheter ser ut. I dag går slam från samtliga Gästrike Vattens reningsverk till kompostering till anläggningsjord eller som täckmaterial på deponier. Slammet från fem av sex avloppsreningsverk har metallhalter under, i SFS 1998:944 ansatta, gränsvärden för att få spridas på produktiv mark. Det reningsverk som innehåller för höga metallhalter är Duvbackens reningsverk som tar emot spillvatten från Gävle kommun med omnejd och bidrar med mer än 60 % av den totala slammängden från Gästrike Vatten. Av den anledningen kommer Gästrike Vatten ha svårt att nå riksdagens ansatta miljömål avseende återföring av fosfor till produktiv mark. Syftet med denna studie var att utreda vilka avsättningsalternativ som är hållbara miljömässigt och ekonomiskt. Studien beskriver Gästrike Vattens avloppsreningsverk och avsättningsalternativ för slammet. En massbalansstudie har upprättats för utvalda metaller i spillvatten från olika upptagningsområden och producerat slam. Studien visade att det enda avsättningsalternativ som i dag gör det möjligt att nå riksdagens miljömål avseende återföring av fosfor till produktiv mark, till en rimlig kostnad, är en kvalitetssäkring av slammet enligt REVAQ med påföljande återföring till åkermark. Sålunda fokuserades studien på att utreda möjligheterna att REVAQ-certifiera Duvbackens reningsverk. En ökning av Cd, Cu och Zn i slammet på Duvbackens reningsverk de senaste åren tyder på ökade utsläpp till spillvattennätet, vilket är ett troligt resultat av bristande underhåll av oljeavskiljare då Gävle kommuns monopol på hämtning av farligt avfall togs bort 2007. Genom en kartläggning av spillvattennätet och de påkopplade verksamheterna samt en provtagning i större noder på spillvattennätet konstaterades att de största relativa metallmängderna kommer från industriområden i Gävle. Verksamheter som använder Cd, Cu och Zn är fordonstvättar, verkstadsindustrier och ytbehandlingar. Samtliga industriområden där dessa verksamheter finns är därför viktiga att studera närmre. / Gästrike Vatten is owned by the municipalities of Gävle, Hofors, Ockelbo and Älvkarleby and established in 2008. The company is responsible for handling and treating wastewater in the municipalities. Gästrike Vatten elutes wastewater from approximately 120,000 persons and all in all they handle 11,000 tonnes sewage sludge per year to a total cost of 5,000,000 SEK. Because of the Swedish Parliament’s environmental objectives reutilization of 60 % of the phosphorus from sewage sludge to agricultural soils, Gästrike Vatten now want to investigate possible options for reutilization of their sewage sludge. Gästrike Vatten has six wastewater treatment plants. Except for Duvbacken sewage treatment plant all of them produce sewage sludge with metal concentrations below the maximum permissible value for spreading sewage sludge on agricultural soils. The sewage sludge from Duvbacken comprises of more than 60 % of the total amount managed at Gästrike Vatten. As a result of this, Gästrike Vatten has difficulties reaching the Swedish Parliament’s environmental objectives for reutilization of phosphorous. Today, all sewage sludge from Gästrike Vatten is composted for later use as covering material for landfills. The objective of the present study was to investigate the possible options for environmental and economic sustainable reutilization of sewage sludge. This thesis describes Gästrike Vatten’s treatment plants and possible options for reutilization of sewage sludge. A mass balance study was conducted for Duvbacken as well as a detailed study on cadmium (Cd), copper (Cu) and zinc (Zn) content in the sludge. The study showed that the only option for Gästrike Vatten to meet the Swedish Parliament’s environmental objectives on reutilization phosphorous is certifying the sewage sludge according to REVAQ with subsequent reutilization to agricultural soils. Consequently, this study focuses on the possibility to implement REVAQ. An increase in concentrations of Cd, Cu and Zn in the sewage sludge from Duvbacken during the last years indicates an increase of emissions to the sewerage. The reason may be the abolition of the municipal monopoly on emptying the oil separators. Mapping the sewerage catchment areas and associated industries as well as sampling the effluent, it was found that the major metal contribution to the sewage sludge comes from industrial activities. Industries that can be expected to contribute to excessive release of Cd, Cu and Zn to the sewerage are engineering industries and surface treatment industries. Thus, all the industrial areas containing these industries are of interest in further studies.

Abstract At Saltvikens copperindustry, which is located in the municipality of Oskarshamn, copper was refined from sulphiteore some hundred years ago. The ore underwent several steps in the process before the final product was received. These steps all had an influence on the environment through discharge of heavy metals. The area where the copper industry was located is today considered to be of specific national interest due to its valuable nature and cultural values, as well as its value for recreational outdoor activities. Therefore, it is important to determine the present level of contamination and if any transport of contaminants have occurred, and to identify the risks that are associated with the site both at present and in a longer time perspective. Thirtynine soil samples and 16 sediment samples have been analyzed. All samples have undergone two different leaching procedures before the analyis; one with nitric acid for determination of total concentration and one with acidic acid to analyze the plant available part. The analysis was perfomed through Atomicabsorptionsspectrofotometry. In addition, pH and loss on ignition have been measured on all samples. The chemical values were then compared to reference values in order to establish the level of contamination. Within the risk assessment framework where then also a exposure modelling conducted. This was made both for an average exposure situation, and for a reasonable maximum exposure. For both these scenarios, one calculation was made based on the soil use of today and one was made based on an assumed future usage of the area for establishment of residential buildings. The results show that both the land area and sediment have been affected by the copper industry. From 48 sediment samples, 46 generated concentrations above the assumed effect level levels given by the Swedish Environmental Protection Agency. The results also indicated that a significant contaminant transport has occurred, and is still occurring. This is supported by high metal concentrations in deep soil layers and by high concentrations in the sediment. The condition is considered to be very much serious in the case of copper and zinc and serious to less serious for lead, depending on the ground use. Some of the metals are very easy to leach and can thus contaminate adjacent areas for a long time. Already at the present ground use, there is a risk for children to become exposed to  zinc and lead in doses that can generate negative health effects. At the potential future ground use the TDI for both copper, zinc and lead will be exceeded if a child is exposed. For adults, however, the TDI value for zinc and lead is exceeded only in the scenario with the potential future ground use.