959 resultados para emissione spontanea,emissione stimolata,schema a quattro livelli,atomi,fotoni,Olografia


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American policy-makers are predisposed towards the idea of a necessary war of survival, fought with little room for choice. This reflects a dominant memory of World War II that teaches Americans that they live in a dangerously small world that imposes conflict. Critics argue that the ‘choice versus necessity’ schema is ahistorical and mischievous. This article offers supporting fire to those critiques. America’s war against the Axis (1941–45) is a crucial case through which to test the ‘small world’ view. Arguments for war in 1941 pose overblown scenarios of the rise of a Eurasian super-threat. In 1941 conflict was discretionary and not strictly necessary in the interests of national security. The argument for intervention is a closer call that often assumed. This has implications for America’s choices today.

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In A Compendium of the Characteristics of Categories (Padārthadharmasaṃgraha) the classical Vaiśeṣika philosopher Praśastapāda (6th c. CE) presents an innovative metaphysics of the self. This article examines the defining metaphysical and axiological features of this conception of self and the dualist categorial schema in which it is located. It shows how this idea of the self, as a reflexive and ethical being, grounds a multinaturalist view of natural order and offers a conception of agency that claims to account for all the reflexive features of human mental and bodily life. Finally, it discusses the ends of self’s reflexivity and of human life as a return to the true self. It argues that at the heart of Praśastapāda’s metaphysics of self is the idea that ethics is metaphysics, and that epistemic practice is ethical practice.

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Syftet med studien var att undersöka hur fallfrekvensen var fördelad mellan män och kvinnor, hur antalet fall var fördelade i åldersgrupperna över respektive under 80 år, när de flesta fallolyckor i det egna hemmet inträffade och om fallen medförde några konsekvenser.Studien var en retrospektiv registerstudie och inkluderade fall hos personer i eget boende med trygghetslarm och/eller hjälp av nattpatrull. Fallolyckorna registrerades på ett instrument som var speciellt utvecklat för projektet. Data från en sex månaders studie med totalt 510 fall av 213 individer analyserades. Resultatet visade att det var främst äldre personer över 80 år som föll och som hamnade på sjukhus. Fallen inträffade oftast förmiddagar och eftermiddagar. Få fall inträffade mellan klockan 00-09. Kvinnorna föll framförallt under december månad. Antal fall som ledde till sjukhusvård var 4.5 % och av dessa var nästan alla individer över 80 år och flertalet var kvinnor. Av de fall som ledde till sjukhusvård inträffade 39 % vid första och enda fallet. Då många vårdtagare föll ett flertal gånger och antalet fall kunde vara mycket högt bör de fallförebyggande åtgärderna ses över. Downton fallriskindex skulle kunna vara ett komplement till övriga fallpreventioner i hemmet. Studien ger användbar data med möjlighet att till exempel utforma hemtjänstens schema utifrån studieresultatet och på så sätt minska antalet fallolyckor i hemmen.

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Uppsatsen behandlar Gustafsbergs barnhusinrättning, en skola för pojkar som dessutom var Sveriges första internatskola. Syftet med uppsatsen är att undersöka vilka kriterier man hade på undervisningen på barnhusinrättningen från 1860-talets mitt och fram till mitten på 1880-talet samt vilka eleverna var som vistades där under den perioden. Detta görs utifrån frågeställningarna hur barnhusinrättningens stadgar såg ut under senare delen av 1800-talet, hur en kurs/läroplan under den aktuella tidsperioden såg ut och hur ämnena var fördelade, samt vilken bakgrund de elever som gick på barnhusinrättningen under den aktuella tidsperioden kunde ha och vad de ägnade sig åt efter examen från skolan.För att kunna genomföra undersökningen användes tillgängligt arkivmaterial angående Gustafsbergs barnhusinrättning, framför allt på arkivet på Gustafsbergsstiftelsen men även på Bohusläns föreningsarkiv.Undersökningen visade att stadgan och kursplanen angav att eleverna skulle delas in i tre klasser, en nedre, en mellersta och en övre. Utifrån denna indelning placerades elever i åldrarna mellan 6-16 in, dock rådde särskilda krav på blivande elever som skulle bli antagna till skolan och likaså på intagna elever för att de skulle kunna examineras. Examinationerna kontrollerades utförligt. Undervisningen på skolan skulle motsvara det statliga läroverkets fem lägre klasser. Läroämnena som skulle ingå i undervisningen och dess fördelning är tydlig både i stadgan och i kursplanerna. Ämnena skulle fördelas på 32 timmar i veckan, då tillkom ytterligare timmar för vidare studier vilket innebar ett ganska pressat schema. Diverse olika kriterier ställdes således på de olika klasserna, men också på lärarna vilka förväntades följa uppsatta riktlinjer för hur de skulle arbeta när det handlade om tidsfördelning bland klasserna och gällande olika ämnen. Kvaliteten på undervisningen och lärarna eftersträvades av skolan att hålla hög klass för att ge eleverna chans till vidare studier.Vilken bakgrund, och hemförhållanden, de elever som gick på barnhusinrättningen kom från blir tydlig med hjälp av barnhuslängden och ansökningar till barnhuset. Alla barnen hade gemensamt att de var fattiga och således kom från påvra förhållanden, de var alla hemmahörande i Bohuslän. Många gånger var det den enda lösningen de anhöriga kunde se för att ge barnet en chans till en framtid. Eleverna i undersökningen gick, i de allra flesta fallen, vidare till olika yrken som till exempel inom handel och kontor, länsman och sjöman. Vidare studier förekom också liksom emigrering till Amerika.

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In what ways and under what circumstances can a movie be a resource for individuals and their thoughts about existential matters? This central research question has been investigated using a both quantitative and qualitative approach. First, a questionnaire was distributed amongst 179 Swedish students to provide a preliminary overview of film habits. The questionnaire was also used as a tool for selecting respondents to individual interviews. Second, thirteen interviews were conducted, with viewers choosing their favourite movie of all time. In the study socio-cognitive theory and a schema-based theoretical tool is adopted to analyze how different viewers make use of movies as cultural products in an interplay between culture and cognition in three contexts; a socio-historic process, a socio-cultural interaction with the world and inner psychological processes. Summarizing the interviews some existential matters dominated. Matters of immanent orientation were in the foreground. Transcendental questions received much less attention. Summarizing the schema-based theoretical question, assessing which cognitive schema structures the narratives were processed through, the study found an emphasis on a combination of two main cognitive structures, person schema and self schema. Detailed person schematic cognitive processes about fictitious characters on the screen and their role model behaviour were combined by the respondents with dynamic cross-references to detailed self schematic introspections about their own characteristics, related to existential matters at some very specific moments in their lives. The viewers in the study seem to be inspired by movies as a mediated cultural resource, promoting the development of a personal moral framework with references to values deeply fostered by a humanistic tradition. It is argued that these findings support theories discussing individualised meaning making, developing ‘self-expression values’ and ‘altruistic individualism’ in contemporary western society.

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Queen Christina of Sweden (1626-1689)) is probably the most important individual to directly link the cultures of Sweden and Italy, and thus fascinate scholars over the last four centuries. In the last fifty years, research on and interest in this monarch has been particularly intense. This has led to current international scientific debate concerning all the different cultural expressions in which Queen Cristina was particularly involved. However, until now there has been lacking a comprehensive work to illustrate the development of scientific research in Italian on Queen Christina. This article, therefore, without claiming to be exhaustive, aims to fill this gap by identifying the main direction of current research. The article, after briefly introducing previous works (both Italian and Swedish), demonstrates how the first major renaissance of international studies on Queen Cristina took place in Sweden in the early 1960s. Even more important was the subsequent turning point in 1989, when the tercentenary of the death of Queen Christina was celebrated and the Azzolino Collection at the Biblioteca Comunale in Jesi was opened. The article focuses on the studies in Italian during this latter period. To make the exposition more organic and, importantly, more accessible to those readers interested in only one particular aspect of the scientific studies about Queen Christina, the studies in Italian since 1689 are divided into different subject areas.

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In what ways and under what circumstances can a movie be a resource for individuals and their thoughts about existential matters? This central research question has been investigated using a both quantitative and qualitative approach. First, a questionnaire was distributed amongst 179 Swedish students to provide a preliminary overview of film habits. The questionnaire was also used as a tool for selecting respondents to individual interviews. Second, focus group and individual interviews were conducted, with viewers choosing their favourite movie of all time. In the study socio-cognitive theory and a schema-based theoretical tool is adopted to analyze how different viewers make use of movies as cultural products in an interplay between culture and cognition in three contexts; a socio-historic process, a socio-cultural interaction with the world and inner psychological processes. The viewers in the study seem to be inspired by movies as a mediated cultural resource, promoting the development of a personal moral framework with references to values deeply fostered by a humanistic tradition. It is argued that these findings support theories discussing individualised meaning making, developing ‘self-expression values’ and ‘altruistic individualism’ in contemporary western society.

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This study aims to investigate possible distinctions between professional and non-professional written travel texts all treating the same destination: the Norwegian ski resort Trysil. The study will investigate to what extent the different texts correlate with the genre of travel texts, as the travel texts are treated as personal narratives, and how they conform to a given structure for narratives and with guidelines for professional writers. Furthermore, the investigation aims to explore to what extent there are similarities and differences between the texts regarding the given structure. The texts will first be analysed and organized separately by macrorules and a news schema that are constructed specifically for these sorts of texts, in order to reveal their discourse structure, and then compared to each other. As the discourse structure of the different texts is revealed, it is seen that there are certain differences between the two different text types. Finally, seen that the text types differ in their structure, this study will show that despite the fact that journalists write stories, and that non-professional written stories are narratives, they do not share the same structure, and are constructed in different ways.

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Semantic Analysis is a business analysis method designed to capture system requirements. While these requirements may be represented as text, the method also advocates the use of Ontology Charts to formally denote the system's required roles, relationships and forms of communication. Following model driven engineering techniques, Ontology Charts can be transformed to temporal Database schemas, class diagrams and component diagrams, which can then be used to produce software systems. A nice property of these transformations is that resulting system design models lend themselves to complicated extensions that do not require changes to the design models. For example, resulting databases can be extended with new types of data without the need to modify the database schema of the legacy system. Semantic Analysis is not widely used in software engineering, so there is a lack of experts in the field and no design patterns are available. This make it difficult for the analysts to pass organizational knowledge to the engineers. This study describes an implementation that is readily usable by engineers, which includes an automated technique that can produce a prototype from an Ontology Chart. The use of such tools should enable developers to make use of Semantic Analysis with minimal expertise of ontologies and MDA.

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The specification of Quality of Service (QoS) constraints over software design requires measures that ensure such requirements are met by the delivered product. Achieving this goal is non-trivial, as it involves, at least, identifying how QoS constraint specifications should be checked at the runtime. In this paper we present an implementation of a Model Driven Architecture (MDA) based framework for the runtime monitoring of QoS properties. We incorporate the UML2 superstructure and the UML profile for Quality of Service to provide abstract descriptions of component-and-connector systems. We then define transformations that refine the UML2 models to conform with the Distributed Management Taskforce (DMTF) Common Information Model (CIM) (Distributed Management Task Force Inc. 2006), a schema standard for management and instrumentation of hardware and software. Finally, we provide a mapping the CIM metamodel to a .NET-based metamodel for implementation of the monitoring infrastructure utilising various .NET features including the Windows Management Instrumentation (WMI) interface.

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The Short-term Water Information and Forecasting Tools (SWIFT) is a suite of tools for flood and short-term streamflow forecasting, consisting of a collection of hydrologic model components and utilities. Catchments are modeled using conceptual subareas and a node-link structure for channel routing. The tools comprise modules for calibration, model state updating, output error correction, ensemble runs and data assimilation. Given the combinatorial nature of the modelling experiments and the sub-daily time steps typically used for simulations, the volume of model configurations and time series data is substantial and its management is not trivial. SWIFT is currently used mostly for research purposes but has also been used operationally, with intersecting but significantly different requirements. Early versions of SWIFT used mostly ad-hoc text files handled via Fortran code, with limited use of netCDF for time series data. The configuration and data handling modules have since been redesigned. The model configuration now follows a design where the data model is decoupled from the on-disk persistence mechanism. For research purposes the preferred on-disk format is JSON, to leverage numerous software libraries in a variety of languages, while retaining the legacy option of custom tab-separated text formats when it is a preferred access arrangement for the researcher. By decoupling data model and data persistence, it is much easier to interchangeably use for instance relational databases to provide stricter provenance and audit trail capabilities in an operational flood forecasting context. For the time series data, given the volume and required throughput, text based formats are usually inadequate. A schema derived from CF conventions has been designed to efficiently handle time series for SWIFT.

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A fim de examinar se o brinquedo simbólico organiza-se numa forma narrativa capaz de desvelar a subjetividade da criança, no presente trabalho é estudado o brincar produzido por três crianças, respectivamente a partir de três estudos de caso. Em cada caso é feita, primeiramente, uma comparação entre as situações d brincar e o esquema narrativo de Todorov. Em seguida, o sentido das narrativas é analisado e comparado com o contexto de vida da criança, segundo a metodologia proposta por jung. Ao final, os resultados dos estudos de caso são comparados. Nosso estudo demonstra que o brinquedo simbólico organiza-se como uma narrativa, mas discute o emprego do conceito de narrativa exclusivamente a partir da narratologia. Isto porque o brinquedo simbólico pode, também, se organizar como uma imagem. Neste estudo, também é mostrado e discutido o modo como a subjetividade da criança aparece no brinquedo simbólico.

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O Resource Description Framework (RDF) é uma infra-estrutura, que possibilita a codificação, troca e reuso de metadata estruturado. Metadata é dados sobre dados. O termo refere a qualquer dado usado para ajudar a identificação, descrição e localização de recursos eletrônicos na rede. O RDF permite adicionar declarações, sinônimos e palavras que não estão presentes nos recursos, mas que são pertinentes a eles. Uma declaração RDF pode ser desenhada usando diagramas de arcos e nodos, onde os nodos representam os recursos e os arcos representam as propriedades nomeadas. O modelo básico consiste em recursos, propriedades e objetos. Todas as coisas sendo descritas pelas declarações RDF são chamadas de recursos. Um recurso pode ser uma página da Web inteira ou um elemento específico HTML ou XML dentro de um documento fonte. Uma propriedade é um aspecto específico, característica, atributo, ou relação usada para descrever um recurso. O objeto pode ser um outro recurso ou um literal. Estas três partes, juntas, formam uma declaração RDF. O resultado do parser para recursos com metadata RDF, é um conjunto de declarações referentes aquele recurso. A declaração destas propriedades e a semântica correspondente delas estão definidas no contexto do RDF como um RDF schema. Um esquema não só define as propriedades do recurso (por exemplo, título, autor, assunto, tamanho, cor, etc.), mas também pode definir os tipos de recursos sendo descritos (livros, páginas Web, pessoas, companhias, etc.). O RDF schema, provê um sistema básico de tipos necessários para descrever tais elementos e definir as classes de recursos. Assim, os recursos constituindo este sistema de tipos se tornam parte do modelo RDF de qualquer descrição que os usa. A geração de modelos RDF pode ser conseguida através de algoritmos implementados com linguagens de programação tradicionais e podem ser embutidos em páginas HTML, documentos XML e até mesmo em imagens. Com relação a modelos em imagens, servidores Web específicos são usados para simular dois recursos sobre o mesmo URI, servindo ora a imagem ora a descrição RDF. Uma alternativa para armazenar e manipular grande quantidade de declarações RDF é usar a tecnologia de banco de dados relacional. Abordagens para armazenar declarações RDF em banco de dados relacional foram propostas, mas todas elas mantêm modelos diversos de diferentes fontes. Critérios de avaliação como tempo de carga, proliferação de tabelas, espaço, dados mantidos e custo de instruções SQL foram definidos. Duas abordagens apresentaram resultados satisfatórios. Com uma nova abordagem proposta por este trabalho se obteve melhores resultados principalmente no aspecto de consultas. A nova proposta provê mecanismos para que o usuário faça seu próprio modelo relacional e crie suas consultas. O conhecimento necessário pelo usuário se limita em parte aos modelos mantidos e ao esquema RDF.

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A utilização de versões tem sido essencial em diversas aplicações de banco dados, por permitir o armazenamento e a manipulação de diferentes estados da base de dados. Durante a evolução de um esquema, o versionamento preserva todas as versões de esquemas e de seus dados associados. Por outro lado, os conceitos de bancos de dados bitemporais, que incorporam tanto tempo de transação quanto tempo de validade, provêm flexibilidade ao mecanismo de evolução de esquemas, não somente por permitir acesso a informações presentes, passadas e futuras, mas também por permitir atualizações e consultas entre as diversas versões de esquemas existentes. O objetivo principal desta tese é definir um modelo que utilize os conceitos de tempo e de versão para permitir o gerenciamento da evolução dinâmica de esquemas em bancos de dados orientados a objetos. O resultado, o Modelo Temporal de Versionamento com suporte à Evolução de Esquemas (TVSE - Temporal and Versioning Model to Schema Evolution), é capaz de gerenciar o processo de evolução de esquemas em todos os seus aspectos: versionamento e modificação de esquemas, propagação de mudanças e manipulação de dados. Esse modelo difere de outros modelos de evolução de esquemas por permitir o gerenciamento homogêneo e simultâneo do histórico da evolução do banco de dados intencional e extensional. Com o objetivo de complementar a definição deste modelo é apresentado um ambiente para gerenciar o versionamento temporal da evolução de esquemas. Desse ambiente foi implementado um protótipo da ferramenta de apoio ao gerenciamento de evolução de esquemas. Por fim, enriquecendo o universo da tese e com o intuito de prover uma maior fundamentação teórica e matemática para descrever as políticas de evolução de esquemas, é especificada uma semântica operacional para um subconjunto do modelo proposto.