O depósito de níquel laterítico de Niquelândia, GO, Brasil, é considerado um dos mais importantes depósitos desta natureza no país, em razão de sua dimensão, seus teores ligeiramente mais elevados e associação com argilominerais. Desde a década de 70, autores como Trescases e Santos já estudavam seus argilominerais detentores de níquel. Este depósito difere dos cubanos e australianos, pois os primeiros têm o níquel associado aos minérios oxidados e os segundos à serpentina. Em Niquelândia, o níquel está associado principalmente às esmectitas e vermiculitas. A existência destes argilominerais ricos em níquel torna o processo hidrometalúrgico aplicado em Niquelândia o menos recomendado, o que pode ser verificado através de perdas significativas de níquel no rejeito, principalmente no que se refere ao minério silicatado. Estas perdas estão relacionadas com a formação de silicatos de magnésio, como piroxênios, anfibólios e olivinas ainda durante o processo de moagem do minério, isto ocorre devido à técnica aplicada para a redução da umidade. A formação destes minerais retém o níquel em suas estruturas, não permitindo que este seja solubilizado na etapa de lixiviação amoniacal. Em Niquelândia, o principal portador de níquel é a esmectita, no entanto, são identificadas esmectitas di e trioctaédricas, quase sempre associadas. Estas variam desde um extremo trioctaédrico rico em níquel, praticamente refratário ao processo Caron, à esmectitas dioctaédricas de ferro, de baixos teores de níquel, mas com boa recuperação junto ao processo. Contudo, predominam no depósito esmectitas di e trioctaédricas de composições variadas de Fe-Mg-Ni, classificadas como montmorillonitas/stevensitas. Uma maneira de minimizar as perdas de recuperação de níquel seria exercer maior controle sobre a alimentação da usina, de forma a reduzir a proporção de minério silicatado do tipo esmectita trioctaédrica, aumentando a proporção de minério oxidado+minério silicatado de esmectitas dioctaédricas. / The nickel lateritic ore from Niquelândia Goiás - is one of the most important and well known Ni lateritic deposits in Brazil. High nickel contents, the deposit dimension and also, their associations with clay minerals are the main reasons for researchers, such as Trescases and Santos, to have studied it in the 1970s. The Cuban and Australian deposits have nickel associated to oxidized ores and serpentine, respectively, but at Niquelandia, nickel is specially associated to smectites and vermiculites. The Caron Process is not the most suitable for treating Ni-bearing clay minerals, as those present in Niquelândia. Consequently, there are many losses related to silicated ore. The reduction temperature used in the Caron process in the reduction step can form minerals, such as pyroxene, amphibole and olivine. These minerals trap Ni inside their structure; hence, the ammoniacal solution can not access this element and solubilize it. The main Ni-bearing clay mineral observed in Niquelândia is smectite. Actually, the silicated ore is composed by a mixture of smectites. One of them is a Ni-trioctahedral one, which is not affected by ammoniacal leaching; however, it has a significant amount of nickel. On the other hand, a dioctahedral Fe-rich smectite, has high Ni recoveries, but its nickel content is lower. Samples composed by a mixture of di and trioctahedrals smectites - Fe-Mg-Ni montmorillonite/stevensite are the most common. Considering all these factors, the losses related to Ni-recoveries can be avoided by a better feed control. The ideal feed should be an oxidized ore + silicate ore composed by dioctahedrals smectites. The Ni trioctahedral smectite should be avoided.

Orientador: Rafael Dias Loyola / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia / Made available in DSpace on 2018-08-23T15:32:42Z (GMT). No. of bitstreams: 1 Sant'Anna_ClaraLuzBraga_M.pdf: 15999631 bytes, checksum: d43098e998277d4decc83772d68234c2 (MD5) Previous issue date: 2013 / Resumo: O processo de invasão biológica por espécies exóticas pode levar a substituição de espécies nativas. Este processo é crítico quando ocorre no interior de Unidades de Conservação (UC). Para entender a dinâmica de invasão e expansão das espécies invasoras é necessário levar em conta as características da espécie invasora associadas às características abióticas e bióticas dos ecossistemas invadidos, o fator temporal e mecanismos específicos a cada sistema. Estudamos através de análises exploratórias e modelos de simulação em Autômato Celular, o processo de expansão da Brachiaria spp. no Parque Nacional das Emas (Parna Emas), uma das mais importantes Unidades de Conservação do Cerrado. Utilizamos dados da distribuição espaço-temporal da gramínea dos anos de 2002 e 2012, em 80 Km das estradas internas do parque (25% das estradas) para associar a expansão às variáveis ambientais: distância relativa à margem das estradas internas do parque, categoria de zoneamento, tipo de fitofisionomia de Cerrado e declividade. Os fatores ambientais mais relevantes no processo de expansão da Brachiaria spp. foram: as estradas internas do Parna Emas, cuja presença e alta freqüência de uso influenciam positivamente a expansão da gramínea, e em áreas com intenso tráfego de veículos a abundância da Brachiaria spp. foi dez vezes maior que em áreas onde o acesso é restrito; a disponibilidade de luz e espaço foram fatores limitantes à expansão, áreas de fitofisionomias abertas de Cerrado, como Campo Limpo, mostraram ser mais susceptíveis a invasão, com expansão até vinte vezes maior que áreas florestais; e a declividade, mesmo sutil, pareceu direcionar a expansão da gramínea para regiões de menor altitude. Assim indicamos algumas medidas de manejo: restringir ao máximo o uso das estradas internas do Parna Emas, aplicar medidas fitossanitárias nos veículos, botas e vestimentas de funcionários e visitantes, a fim de inviabilizar as sementes dispersadas por estes, priorizar o manejo em áreas de Campo Limpo, em especial uma região no centro do Parna Emas que pode estar funcionando como fonte interna de sementes, e recomendamos atenção aos locais em declividade, de modo a prever a direção da expansão e assim tomar as medidas preventivas cabíveis. Esperamos assim que nosso estudo contribua para o desenvolvimento de melhores políticas e ações de monitoramento, manejo e controle de Brachiaria spp. em Unidades de Conservação, em geral, e no Parque Nacional das Emas, em particular / Abstract: The process of biological invasion by exotic species may lead to replacement of native species. This process is critical when it occurs within Protected Areas (PA). To understand the dynamics of invasion and spread of invasive species is necessary to take into account the characteristics of invasive species associated with abiotic and biotic characteristics of invaded ecosystems, the temporal issue and specific mechanisms to each system. We study by exploratory analyzes and Cellular Automaton simulation models, the expansion process of Brachiaria spp. in Emas National Park (Parna Emas), one of the most important Protected Areas of the Cerrado. We used data from spatial-temporal distribution of this species with a time lag of 10 years among them (2002 and 2012), over 80 km of internal roads of the Parna Emas (25% of the roads) to link the expansion of this invasive grass to environmental variables such as: relative distance along the sideroads inside the park, category of zonation, type of Cerrado vegetation and slope. The results indicate that the most important environmental factors in the expansion process of Brachiaria spp. where: the internal roads of the Parna Emas, whose presence and high frequency of use positively affect the growth of the grass, and in areas with intense vehicle traffic the abundance of Brachiaria spp. was ten times higher than in areas where access is restricted; light availability was the limiting factor to expansion, so that areas of open Cerrado physiognomies as Campo Limpo, proved to be more susceptible to invasion, with expansion up to twenty times greater than forested areas; and the slope, even subtle (about 1 degree), seemed drive the expansion of grass to the lower areas. From these results we point out some management measures such as: restricting the most the use of internal roads of Parna Emas and apply phytosanitary measures in vehicles, boots and clothing of staff and visitors in order to make impracticable the seeds dispersed by them; prioritize management in areas of Campo Limpo, one in particular placed in the center of Parna Emas that may be functioning as internal source of seeds; and we recommend paying attention to the places in declivity, in order to predict the direction of expansion and thus take the necessary preventive measures. We thus hope that our study will contribute to the development of better policies and actions of monitoring, management and control of Brachiaria spp. in Protected Areas, in general, and in Emas National Park in particular / Mestrado / Ecologia / Mestra em Ecologia

Concurrency is generally considered to be difficult due to a lack of appropriate abstraction, rather than inherent complexity. Lock-based approaches to mutual exclusion are pervasive, despite the presence of models that are easier to understand, such as the message-passing model present in CSP (Communicating Sequential Processes). CSP provides a rich framework for building and reasoning about concurrent systems, but has historically required a change of programming language or paradigm in order to work with it. The Go programming language is a modern, imperative programming language that includes native support for processes and channels. The popularity of this language has grown and more and more people are being exposed to the fundamental ideas of CSP. There is a gap in the understanding of how a restrictive formal model can interact with and support the development of concurrent programs in a language such as Go. Through a series of case studies and analysis, we show how the CSP concurrency model can be used as the basis for the design of a concurrent system architecture without requiring the program to be written entirely as the composition of processes. It is also possible to use the CSP process algebra to build abstract models and use model-checking tools to verify properties of a concurrent system. These models can then be used to guide the decomposition of a system into a more fine-grained concurrent system. This thesis bridges the gap between the development of CSP-style concurrent software and the formal model of CSP. In particular, it shows how it is not necessary for a program or programming language to conform to rigid structure in order for CSP to be a useful tool for the development of reliable and easy to understand concurrent systems.

Adoption of location-based services (LBS) was for a long time below expectations, and most of the studies attribute it to privacy concerns of users. However, many new LBS applications are currently among the most downloaded application for smartphones, particularly entertainment applications. Therefore, this research aims to find out whether privacy concerns still matter to users and to explore the role of the privacy in the adoption of LBS entertaining applications. The adopted methodology is qualitative research and data are collected through interviews and additional information from the smartphones ofparticipants. Ten individuals among university students at Linnaeus University in Sweden are selected for this research, and this sample choice is per their experience with two selected LBS entertaining applications, Pokémon Go and Tinder. As a result, six themes have been recognized to answer the research questions. Low privacy concerns about location information, especially in entertainment applications with negligible effect on adoption have been identified. However, author of this research suggests, that developers of LBS entertaining applications should care for retaining their credibility because it can have an impact on the adoption of their LBS services.

Conformément aux principes de la médecine factuelle, les guides de bonne pratique clinique (GBPC) sont élaborés dans un but d'amélioration de la qualité des soins. Pourtant, le suivi des recommandations par les médecins reste faible, même lorsqu'elles sont intégrées dans des systèmes informatisés d'aide à la décision. En effet, elles sont souvent critiquées pour leur manque de flexibilité, et leur incapacité à gérer la singularité des patients rencontrés en pratique clinique. En particulier, leur orientation monopathologique est en inadéquation avec la réalité de patients bien souvent polypathologiques. Nos travaux portent sur la proposition d'une méthode basée sur un raisonnement ontologique pour permettre la conciliation de GBPC pour la prise en charge flexible de patients polypathologiques au sein d'un système d'aide à la décision. Les bases de connaissances reposent sur des règles construites par formalisation des recommandations, dont les critères patients sont organisés par une ontologie du domaine, permettant de produire un graphe des profils cliniques structuré par généralisation. Le raisonnement ontologique permet une juste adaptation des connaissances aux niveaux d'abstraction variables de la description du patient. Cette méthode a été implémentée dans un système d'aide à la décision, appelé GO-DSS, et appliquée à la prise en charge de patients diabétiques et hypertendus, à partir des GBPC produits par la société VIDAL (VIDAL Recos). Le prototype et ses interfaces ont été évalués qualitativement par un échantillon d'utilisateurs comprenant à la fois des informaticiens avec des connaissances médicales et des médecins avec des compétences en informatique. / Clinical practice guidelines (CPGs) are elaborated according to evidence-based medicine principles in order to improve healthcare quality. However, even when they are integrated into clinical decision support systems, recommendations are poorly implemented by physicians. Indeed, CPGs are often criticized for their lack of flexibility, and their inability to handle the singularity of patients encountered in clinical practice. In particular, CPGs are usually elaborated for a single pathology whereas patients usually suffer from multiple pathologies and comorbidities. We have proposed a method based on an ontological reasoning to enable the reconciliation of single-pathology CPGs to support the flexible management of patients with multiple pathologies. Knowledge bases are made of decision rules that formalize the content of single-pathology CPGs. Patient criteria are organized by a domain ontology, which allows the generation of a generalization-ordered graph of clinical patient profiles. The ontological reasoning allows to reason at different levels of abstraction to process clinical cases described with different levels of completeness. This method has been implemented in a decision support system called GO-DSS, and applied to the management of patients suffering from both arterial hypertension and type 2 diabetes, on the basis of CPGs produced by the VIDAL company (VIDAL Recos). The prototype and its user interfaces have been qualitatively evaluated by a sample of users including both computer scientists with medical knowledge and physicians with computer skills.

No description available.

Pokémon GO hit the world with a bang in the summer of 2016 and has since then set new records regarding revenue on multiple occasions. It has been researched extensively, although first and foremost from a HCI (human-computer interactions) and healthcare/public health perspective. In particular, studies approaching the phenomenon from a human geography and urban planning perspective have been very limited. This study therefore takes an inductive and exploratory approach and explores the ways in which Pokémon GO influences how players use and experience the city and how urban planners can use Pokémon GO in their work. To do this, nine interviews were conducted, six with currently active players and three with completely new players. A number of different themes emerged from the interviews and was subsequently used to structure the results. Physical activity, social interactions and benefits and exploration and discovery were the most prominent themes and also the most frequently mentioned reasons why players enjoy the game. Finally the findings are discussed in relation to planning with a focus on participatory planning practices but also in more general terms regarding urban and spatial planning.

In theoretical part of this master thesis is analyzed USB 2.0 interface, including USB OTG. Mainly are described here properties which are good to know for USB device design. In brief is given here a structure of the FAT file system. Practical part contains design of OTG Device and it’s realization including implementation of libraries for communication via USB and for working with FAT file system.

Text in English, with abstracts and keywords in English and Sesotho / This doctoral study investigates the practice of narrative strategies in the creation of animated poetry-film. The status of the animator as auteur of the poetry-film is established on the grounds of the multiple instances of additional authoring that the animated poetry-film requires. The study hypothesises that diverse narrative strategies are operative in the production of animated poetry-film. Two diametrically opposed strategies are identified as ideal for the treatment of lyrical narrative. The first narrative strategy explored is that of metamorphosis, demonstrating how the filmic material originates and grows organically via stream of consciousness and free association. The second narrative strategy entails a calculated approach of structuring visual imagery and meaning through editing from a pre-existing visual lexicon. In both cases, the interdependence is explored between embodied activity and conceptual activity, between tacit and explicit knowledge in the creative act. These two strategies are practically investigated through my creative praxis, specifically the production of two animated poetry-films, Mon Pays and Parys suite. Through these works, the strategies are tested for their effectivity in communicating visual content not contained in the poetry-text, yet adding value to the poetry/animated film hybrid. Animated poetry-film is theoretically contextualised in terms of intermediality and the specific multi-modal nature of the medium. The construction of animated poetry-film is explored through the research study consisting of a thesis and two animated poetry films, with the hope of contributing to research on animated poetry-film specifically, and to animation theory within the South African context. / Dinyakišišo tše tša bongaka di nyakišiša tiro ya mekgwa ya kanagelo ge go hlangwe difilimi tša go ekišwa ke diphoofolo. Maemo a moekiši wa diphoofolo bjalo ka molaodi wa filimi ya theto a hwetšwa go seemo sa mabaka a mantši a go ngwala ka tlaleletšo fao go nyakwago ke filimi ya theto ya go ekišwa ke diphoofolo. Dinyakišišo tše di šišinya gore mekgwa ya kanegelo ye e fapafapanego e a šomišwa ka go tšweletšo ya filimi ya go ekišwa ke diphoofolo. Mekgwa ye mebedi ye e thulanago e a hlaolwa bjalo ka yeo e swanetšego go šomišwa go kanegelo ya mantšu. Leano la mathomo la kanegelo leo le utollotšwego ke la kgolo ya diphoofolo, leo le laetšago ka fao dingwalwa tša filimi di tšwelelago le go gola ka tlhago ka tatelano ka sengwalwa seo se ngwadilwego ka moela wa kwešišo le poledišano ya go hloka mapheko. Leano la bobedi la klanegelo le mabapi le mokgwa wo o nepišitšwego gabotse wa go beakanya seswantšho sa go bonwa le tlhalošo ka go rulaganya go tšwa go polelo ya peleng ya seo se bonwago. Mabakeng ka bobedi, go amana fa go utollwa magareng ga tiro ye e kopantšwego le tiro ye e gopolwago, magareng ga tsebo ye e kwešišwago le yeo e lego nyanyeng ka tirong ya boitlhamelo. Mekgwa ye mebedi ye e a nyakišišwa ka go diriša mokgwa wa ka wa boitlhamelo, kudukudu go tšweletšwa ga difilimi tše pedi tša go ekišwa ke diphoofolo tšeo di bitšwago, Mon Pays le Parys suite. Ka mešomo ye, mekgwa ye e lekwa ka ga go šoma gabotse ga yona gabotse go hlagiša diteng tša go bonwa tšeo di sego gona ka gare ga Sengwalwa sa theto, le ge go le bjale e tsenya boleng go mohuta wa filimi ya theto/ya kekišo. Filimi ya theto ya go ekišwa ke diphoofolo e amantšhwa ka teori mabapi le kgokaganyo le sebopego sa yona sa mekgwa ye mentši ya polelo. Tlhamo ya filimi ya theto ya go ekišwa ke diphoofolo e utollwa ka dinyakišišo tšeo di nago le taodišo le difilimi tše pedi tša theto tša go ekišwa ke diphoofolo, ka kholofelo ya go tsenya letsogo go dinyakišišo mabapi le filimi ya theto ya go ekišwa ke diphoofolo kudukudu, le go teori ya kekišo ka gare ga seemo sa Afrika Borwa. / Art and Music / Ph. D. (Art)

This thesis deals with the right-wing extremism in Federal Republic of Germany, particulary in the Free State of Saxony. The opening part presents the history of the right-wing extremism in the territory of former German Democratic Republic. The following part summarizes briefly the developement of rigth-wing extremism after the german unification. Main attention is focused on the currant course of events. One part is devoted to the strongest and most successfull extreme right-wing political party Nationaldemokratische Partei Deutschlands (NPD), especially to its election results. The thesis further monitors the development of the NPDs political strategy and the enforcing of this strategy in to practice. A special attention is paid to the concept of National befreite Zone (nationally liberated zone). Next parts of the text describe the rapidly growing right-wing extremist subculture. The penetration of right- wing extremism into the areas of sport, music and fashion is proved on several concrete examples. There is a separate chapter devoted to the criminal activities commited by right-wing extremists. It also deals with the legislation which is aimed against the expressions of the right-wing extremism.