Análise wavelet em curvas de luz estelares de sistemas binários da missão espacial CoRoT

Binary systems are key environments to study the fundamental properties of stars. In this work, we analyze 99 binary systems identified by the CoRoT space mission. From the study of the phase diagrams of these systems, our sample is divided into three groups: those whose systems are characterized by the variability relative to the binary eclipses; those presenting strong modulations probably due to the presence of stellar spots on the surface of star; and those whose systems have variability associated with the expansion and contraction of the surface layers. For eclipsing binary stars, phase diagrams are used to estimate the classification in regard to their morphology, based on the study of equipotential surfaces. In this context, to determine the rotation period, and to identify the presence of active regions, and to investigate if the star exhibits or not differential rotation and study stellar pulsation, we apply the wavelet procedure. The wavelet transform has been used as a powerful tool in the treatment of a large number of problems in astrophysics. Through the wavelet transform, one can perform an analysis in time-frequency light curves rich in details that contribute significantly to the study of phenomena associated with the rotation, the magnetic activity and stellar pulsations. In this work, we apply Morlet wavelet (6th order), which offers high time and frequency resolution and obtain local (energy distribution of the signal) and global (time integration of local map) wavelet power spectra. Using the wavelet analysis, we identify thirteen systems with periodicities related to the rotational modulation, besides the beating pattern signature in the local wavelet map of five pulsating stars over the entire time span.

A gestão de F&B num serviço de excelência Conrad Algarve - Portugal

Este relatório tem como principal objectivo a descrição e análise de todos os outlets do departamento de F&B do Conrad Algarve, Resort 5 estrelas luxo no Algarve. Estando o F&B presente ao longo de toda a estada do hóspede, torna-se num departamento em constante observação e avaliação. A falta de qualificação e formação dificulta a satisfação das elevadas expectativas do cliente que adquire uma experiencia de luxo mediante o patamar de serviço realmente alcançado por cada sector. De forma mais ou menos incisiva, esta realidade faz-se sentir na produtividade, na motivação e no atendimento geral ao cliente. Nos outlets em que os recursos a trabalhadores temporários são elevados, o decréscimo do elevado padrão de qualidade é notório aos olhos dos hóspedes. Assim, na mesma medida da falta de formação, também a rotatividade se torna um verdadeiro impedimento ao alcance de um nível estável e coerente da prestação de um serviço de luxo.

Gerenciamento de impressões e qualidade dos serviços em hotéis da Paraíba

The present study has got as its aim to show how the impressions management is being used by the hotels in Paraiba State. For that, the dramma or role play perspective has been adopted as a model for service management. From the theater metaphor, the physical environment and its components can be seen as a scenery of the service show. We conduct the reader to notice the importance of the consummer about the service quality demand and its influence on his satisfaction. A methodology with exploring and qualifying nature has been adopted by using the analyses of content technique in interviews applied to hotel managers lebeled as having 4 and 5 stars in the State, trying to check how impression management takes place, identifying impression management tools used in relation to the physical evidences and to contacting people, as well as checking managers views in the survey about the use of impression management for client satisfaction make. The information revealed that managers, maybe for being unaware about impression management theory, haven t considered neither the physical evidences yet, nor contacting people as marketing tools. About the physical evidences, we could see that hotels take actions in a pulverized way referring to environment decoration and colors, however there isn t a global usage of physical evidences to highlight the service. Contacting people by their turn, receive better importance and attention. It was possible to make sure that managers are aware about the influence of the employee over the attendance quality. This way, we may come into a conclusion that impression management at Paraiba hotels has been under used, as long as managers seem to be, most times, turned to actions related to contacting people, not having realized the planning importance and national-wide use of service scenery in a genaral way yet

Gestão do marketing de relacionamento: um estudo em empresas hoteleiras de Natal - RN

The present study it analyzes the Management of the Marketing of strategy Relationship as distinguishing for the host s companies of the city of Natal - RN. To carry through this analysis interviews with managers had been carried through, as well as the direct comment of processes, documents, actions and strategies developed for the hotels, with intention to know the level of perception and valuation of the relationship with customers, to verify resources and technologies used in the Management of the Relationship Marketing, identification, segmentation and differentiation of customers, personalization of products and services, and results of the emphasis in the relationship with customers for the host s companies. The research can be classified as exploratory - descriptive, and its universe is limited to the city of Natal, having enclosed hotels that have carried through tourist activity in 2005 and 2006. Still on the criteria of election of the sample, the study it investigated host s companies who if fit in the category superior luxury, or either, five stars, pertaining the national nets and international. How much to the treatment and analysis of the data the was made to leave of the theoretical support of the authors who work the thematic one and of the analysis of the interviews with managers, documents and processes observed for the researcher in the studied hotels. The research sample that the interviewed ones understand the importance to work the Management of the Marketing of Relationship in the host s companies me intention to get sustainable competitive advantage. One still evidenced that the searched hotels make use of strategies and instruments of Management of the Marketing of Relationship, however without an ample theoretical knowledge and yes only as base in the experience of the managers and spread processes already, generating one moment competitive advantage and not relationships of long duration

Membranas compósitas para separação de CO2

O presente trabalho envolveu a produção de membranas compósitas para separação de CO2 a altas temperaturas. Os compósitos habituais são constituídos por duas fases, uma cerâmica, de céria dopada com gadolínio (Ce0.9Gd0.1O0.95 - CGO) condutora de iões óxido, que funciona como suporte da segunda fase composta por uma mistura eutética de carbonatos alcalinos (Li2CO3 e Na2CO3), que assegura o transporte de iões carbonato. O objetivo do trabalho prende-se com o estudo do transporte de iões através destes compósitos, por forma a perceber se os sais destes compósitos apresentam condução iónica singular ou condução mista. Neste sentido a resposta a esta questão teve por base a realização de ensaios de eficiência faradaica com recurso a amostras compósitas envolvendo matrizes de CGO (condutor de iões óxido) e de aluminato de lítio (não condutor de iões óxido). A preparação tanto de esqueletos porosos como de compósitos foi realizada tendo por base métodos e precursores semelhantes aos usados na literatura. Primeiramente efetuou-se o processamento dos esqueletos porosos para posteriormente impregnação com mistura eutética de carbonatos. Obtidos os compósitos estes foram caraterizados por microscopia de impedância e por microscopia eletrónica de varrimento de forma a serem submetidos mais tarde aos ensaios de eficiência faradaica. Os resultados de eficiência faradaica revelaram que na realidade existem processos de condução mista cuja importância depende das condições de operação da membrana.

Optimization of Li-ion solid electrolytes

The synthesis and optimization of two Li-ion solid electrolytes were studied in this work. Different combinations of precursors were used to prepare La0.5Li0.5TiO3 via mechanosynthesis. Despite the ability to form a perovskite phase by the mechanochemical reaction it was not possible to obtain a pure La0.5Li0.5TiO3 phase by this process. Of all the seven combinations of precursors and conditions tested, the one where La2O3, Li2CO3 and TiO2 were milled for 480min (LaOLiCO-480) showed the best results, with trace impurity phases still being observed. The main impurity phase was that of La2O3 after mechanosynthesis (22.84%) and Li2TiO3 after calcination (4.20%). Two different sol-gel methods were used to substitute boron on the Zr-site of Li1+xZr2-xBx(PO4)3 or the P-site of Li1+6xZr2(P1-xBxO4)3, with the doping being achieved on the Zr-site using a method adapted from Alamo et al (1989). The results show that the Zr-site is the preferential mechanism for B doping of LiZr2(PO4)3 and not the P-site. Rietveld refinement of the unit-cell parameters was performed and it was verified by consideration of Vegard’s law that it is possible to obtain phase purity up to x = 0.05. This corresponds with the phases present in the XRD data, that showed the additional presence of the low temperature (monoclinic) phase for the powder sintered at 1200ºC for 12h of compositions with x ≥ 0.075. The compositions inside the solid solution undergo the phase transition from triclinic (PDF#01-074-2562) to rhombohedral (PDF#01-070-6734) when heating from 25 to 100ºC, as reported in the literature for the base composition. Despite several efforts, it was not possible to obtain dense pellets and with physical integrity after sintering, requiring further work in order to obtain dense pellets for the electrochemical characterisation of Li Zr2(PO4)3 and Li1.05Zr1.95B0.05(PO4)3.

Gerenciamento de impressões e qualidade dos serviços em hotéis da Paraíba

The present study has got as its aim to show how the impressions management is being used by the hotels in Paraiba State. For that, the dramma or role play perspective has been adopted as a model for service management. From the theater metaphor, the physical environment and its components can be seen as a scenery of the service show. We conduct the reader to notice the importance of the consummer about the service quality demand and its influence on his satisfaction. A methodology with exploring and qualifying nature has been adopted by using the analyses of content technique in interviews applied to hotel managers lebeled as having 4 and 5 stars in the State, trying to check how impression management takes place, identifying impression management tools used in relation to the physical evidences and to contacting people, as well as checking managers views in the survey about the use of impression management for client satisfaction make. The information revealed that managers, maybe for being unaware about impression management theory, haven t considered neither the physical evidences yet, nor contacting people as marketing tools. About the physical evidences, we could see that hotels take actions in a pulverized way referring to environment decoration and colors, however there isn t a global usage of physical evidences to highlight the service. Contacting people by their turn, receive better importance and attention. It was possible to make sure that managers are aware about the influence of the employee over the attendance quality. This way, we may come into a conclusion that impression management at Paraiba hotels has been under used, as long as managers seem to be, most times, turned to actions related to contacting people, not having realized the planning importance and national-wide use of service scenery in a genaral way yet

Devem as porcelanas serem re-silanizadas após a contaminação?

Dissertação (mestrado)—Universidade de Brasília, Faculdade de Ciências da Saúde, Programa de Pós-Graduação em Ciências da Saúde, 2015.

Relatório de Estágio

O Relatório de Estágio apresentado espelha todo um percurso de formação profissional e pessoal desenvolvido ao longo do Mestrado em Ensino do 1.º e 2.º ciclo do Ensino Básico com a finalidade de obter a habilitação para a docência. Do percurso experienciado salienta-se a importância da Prática Educativa Supervisionada realizada no âmbito da Unidade Curricular de Integração Curricular: Prática Educativa e Relatório de Estágio. Na base da Prática Educativa Supervisionada encontram-se um conjunto de pressupostos teóricos e legais que sustentaram toda a trajetória e que são apresentados neste Relatório. Do mesmo modo, são caracterizados os contextos onde se desenvolveu a prática educativa, visto que é fulcral que a ação do professor tenha em conta as especificidades dos mesmos. Assim, é apresentada uma descrição das experiências e vivências concretizadas ao longo da prática educativa. Esta descrição é acompanhada de uma forte dimensão reflexiva que advém de uma postura crítica e indagadora em que as bases teóricas, didáticas e pedagógicas adquiridas se encontram espelhadas. As singularidades mencionadas e das quais o professor se deve capacitar, contribuem para o desenvolvimento de uma prática pedagógica com características de investigação-ação, tendo como finalidade melhorar o ambiente educativo. Importa referir que esta etapa, apoiada numa dinâmica de supervisão que contribuiu significativamente para a construção da identidade profissional, constitui apenas o início de um longo caminho do “ser professor”.

Gestão do marketing de relacionamento: um estudo em empresas hoteleiras de Natal - RN

The present study it analyzes the Management of the Marketing of strategy Relationship as distinguishing for the host s companies of the city of Natal - RN. To carry through this analysis interviews with managers had been carried through, as well as the direct comment of processes, documents, actions and strategies developed for the hotels, with intention to know the level of perception and valuation of the relationship with customers, to verify resources and technologies used in the Management of the Relationship Marketing, identification, segmentation and differentiation of customers, personalization of products and services, and results of the emphasis in the relationship with customers for the host s companies. The research can be classified as exploratory - descriptive, and its universe is limited to the city of Natal, having enclosed hotels that have carried through tourist activity in 2005 and 2006. Still on the criteria of election of the sample, the study it investigated host s companies who if fit in the category superior luxury, or either, five stars, pertaining the national nets and international. How much to the treatment and analysis of the data the was made to leave of the theoretical support of the authors who work the thematic one and of the analysis of the interviews with managers, documents and processes observed for the researcher in the studied hotels. The research sample that the interviewed ones understand the importance to work the Management of the Marketing of Relationship in the host s companies me intention to get sustainable competitive advantage. One still evidenced that the searched hotels make use of strategies and instruments of Management of the Marketing of Relationship, however without an ample theoretical knowledge and yes only as base in the experience of the managers and spread processes already, generating one moment competitive advantage and not relationships of long duration

Síntese de zeólitas e argilas ácidas pilarizadas a partir de matérias primas naturais

Structural changes in waste for zeolites synthesis are subject of many studies carried out in the synthesis of molecular sieves. These materials are named molecular sieves because they have well defined pore sizes and they have the capacity of select molecules by its size. In this work, it was studied the synthesis processes of two types of molecular sieves: pillared acid clays using as starting material one natural montmorillonite clay and the synthesis of zeolites from a silico-aluminous residue. This residue is a byproduct of the extraction of lithium -spodumene. The preparation of pillared acid clays was performed in two steps: 1° acid treatment of clay samples (time and temperature studies) and 2°pilarization of them with Al13 (Keggin ion). The temperature and acid concentration affect the removal of cations in the structure and porosity of the material obtained. The analysis of X-ray diffraction (XRD) and infrared spectroscopy (IR), showed that increasing the severity of the acid treatment compromises the structural material. Also the pore size distribution is approximately uniform. Despite presenting a structural disorganization, the samples were pillared. As evidenced by XRD increasing the basal spacing, specific area and uniform porosity by adsorption of N2. Regarding the microporous molecular sieves were synthesized zeolites A and NaP1 from a silico-aluminous residue, a byproduct of extracting lithium. The temperature and time of agitation during the synthesis were the most important factors for obtaining zeolite A. The aging of the gel and the highest crystallization time promoted the formation of zeolite NaP1 using a Si / Al ratio = 3.2

Desporto e turismo : caraterização dos serviços desportivos e perceção da procura turística em unidades de alojamento do Algarve

O turismo desportivo é um fenómeno que tem sido estudado a partir da segunda metade do século XX, começando a existir uma oferta mais diversificada e planeada de férias em conjunto com a prática desportiva que, segundo Pereira & Carvalho (2004), favoreceu a consolidação do conceito Desporto e Turismo. Segundo Higham (2005), os destinos turísticos são lugares que atraem e satisfazem as necessidades dos visitantes, nomeadamente ao nível: dos recursos, das infra-estruturas e dos serviços necessários para facilitar as viagens para o destino, e da realização de experiências satisfatórias. Neste âmbito, os objetivos deste estudo são identificar a perceção dos gestores quanto à procura desportiva e analisar a oferta desportiva nas unidades de alojamento de 4 e 5 estrelas da região do Algarve. Para este estudo foi feita uma recolha de dados em 43 unidades de alojamento, através de um inquérito por questionário e utilizado como método de análise de dados a estatística descritiva para tratamento de questões fechadas e a análise de conteúdo nas questões abertas. Os resultados mostram que o perfil do turista do Algarve mudou, revelando que os turistas de nacionalidade inglesa pertencentes ao segmento de famílias se apresenta valores mais elevados de procura na época alta, enquanto que na época baixa o segmento de turismo sénior é o que surge em primeiro lugar da procura, sendo o tipo de turismo de sol e mar mais procurado em ambas as épocas. Conclui-se que não existem valores elevados de procura por parte de turistas cuja principal motivação seja a prática desportiva. Verificou-se ainda que tem havido uma evolução ao nível dos serviços desportivos com a existência de mais instalações e responsáveis de seção desportiva nas unidades de alojamento. Os gestores afirmam ter uma oferta adequada em matéria de desporto e que nos próximos 6 meses não irão investir. Relativamente à frequência de utilização das instalações é muito baixa. Ser pago ou gratuito também é um fator influenciador para haver uma maior frequência de utilização.

Cosmologia e astrofísica no ensino secundário

Dissertação de mest. em Física - área de especialização em Física para Ensino, Faculdade de Ciências e Tecnologia, Univ. do Algarve, 2003

Parques de campismo. Uma proposta de projeto para a Mata Nacional do Urso

Dissertação de Mestrado, Arquitetura Paisagista, Faculdade de Ciências e Tecnologia, Universidade do Algarve, 2016

As redes sociais online na hotelaria

Dissertação de Mestrado, Direção e Gestão Hoteleira, Escola Superior de Gestão, Hotelaria e Turismo, Universidade do Algarve, 2016