Dissertations / Theses on the topic 'Cavaletti'
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Almeida, Sandra Isabel Antunes. "Conservação e restauro de pintura de cavalete." Master's thesis, Instituto Politécnico de Tomar, 2012. http://hdl.handle.net/10400.26/5896.
Full textCavaletto, Stefano Michele [Verfasser], and Christoph Helmut [Akademischer Betreuer] Keitel. "Quantum control of x-ray spectra / Stefano Michele Cavaletto ; Betreuer: Christoph Helmut Keitel." Heidelberg : Universitätsbibliothek Heidelberg, 2013. http://d-nb.info/1177810395/34.
Full textAguiar, Amanda Ruth Dafoe de. "Lina Bo Bardi e a atualidade do cavalete de cristal." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/16/16134/tde-07032016-143624/.
Full textThis project undertakes an analysis of the Crystal Easel, exhibition apparatus created in the late 1950s by the Italian-Brazilian architect Lina Bo Bardi as the central element in the expographic composition of the Museu de Arte de São Paulo, MASP. Taking the spatial solution for which the apparatus was planned and the curatorial discourse embedded in it as starting point, the study will show that the design of this object created a singular expographic grammar that, even after its extinction in 1996, continues to reverberate forcefully in international discussions about the challenges of displaying art in museums today. This research relects the need to turn our attention to Lina Bo Bardi\'s proposal, evidencing the validity of resuming the museum\'s original proposal as a way to recover a fundamental space for cultural experience in the city of São Paulo - a museum which, like few others, was born of a deep understanding of the particularities of Brazilian culture.
Sulzbacher, Adair Luiz. "Monitoramento da secagem de milho em secador intermitente de coluna e cavalete." Universidade Federal de Pelotas, 2012. http://repositorio.ufpel.edu.br:8080/handle/prefix/3095.
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O processo de secagem de grãos e sementes é etapa fundamental no recebimento dos produtos agrícolas e sua correta aplicação permite menores perdas qualitativas durante os períodos de beneficiamento e armazenamento. Diante deste cenário, é importante que se domine e se planeje as operações de secagem, tirando o máximo proveito dos equipamentos sem prejudicar a qualidade do grão ou semente, escolhendo o equipamento e processo que melhor se adaptem a sua necessidade e realidade. O objetivo deste trabalho foi avaliar a qualidade dos grãos (trincas relacionadas a variação de temperatura) grãos de milho em dois secadores: intermitente de colunas e cavalete, variando a temperatura de secagem do ar durante a secagem. Durante o processo foram monitorados os parâmetros físicos (amostras, umidade, temperatura ar de secagem, temperatura da massa de grãos). Foi utilizado o sistema Sitrad para monitoramento da temperatura do ar de secagem, e foram coletadas amostras para analise. Observou-se que o aumento da temperatura na entrada do secador na câmara quente, não e proporcional na torre de secagem, ou seja, que à partir de uma determinada temperatura o adicional de temperatura é lançado para atmosfera pelos ventiladores. Com software de monitoramento de temperatura constatou-se que, durante a noite, tem-se muito picos de temperatura, ou seja, leva-se a temperatura ao máximo para demorar mais tempo para alimentação da fornalha e, assim não se mantem uma temperatura constante. Pode-se concluir que há uma tendência de menos trincas no secador de cavalete utilizando o resfriamento da massa de grãos.
The drying process of grains and seeds is a fundamental step for agricultural products and its correct application allows smaller qualitative losses during periods of processing and storage. Given this scenario, it is important to master the drying process, taking full advantage of equipment without harming the quality of the grain or seed, choosing the equipment and process that best suit the needs. The main objective of this study was to evaluate the grain quality (cracks related to temperature variation) of corn in two dryers: intermittent columns and trestle, varying the temperature of the drying air. During the process it was monitored physical parameters ( moisture, drying air temperature, temperature of the seed). Sitrad system was used to monitor the temperature of the drying air, and samples were collected for analysis. It was observed that increasing the inlet temperature of the dryer hot chamber is not proportional to the drying tower, that is, starting from a certain temperature the temperature is further released to the atmosphere by the fans. Temperature monitoring software showed that during the night, there is plenty peak temperatures,and so does not maintain a constant temperature . It can be concluded that there is a trend of fewer cracks using a seed mass cooling system.
Lourenço, Ana Patrícia Bidarra dos Santos Lourenço. "Potencialidade da aplicação de pigmentos estruturados em conservação e restauro de pintura de cavalete." Master's thesis, Universidade de Aveiro, 2007. http://hdl.handle.net/10773/2706.
Full textNo início do século XIX, devido à Revolução Industrial, surgiram novos materiais para pintura. Desenvolveram-se pigmentos sintéticos, que substituíram em grande parte os pigmentos tradicionais, mais caros e mais difíceis de obter. Os novos pigmentos, com origem em indústrias paralelas à do mercado de belas artes, nem sempre se revelaram como a melhor opção, porém, o facto de serem mais baratos e acessíveis, para além de possuírem uma maior paleta de cores, globalizou a sua utilização. Actualmente a indústria das tintas, nomeadamente para belas artes, é mais rigorosa, no entanto, a distância entre conservadores e artistas é maior do que há algumas décadas, onde muitas vezes os dois mundos se cruzavam. O principal objectivo deste trabalho, é o de encontrar uma alternativa aos pigmentos brancos utilizados actualmente em restauro, bem como encontrar um pigmento capaz de ser utilizado em arte contemporânea, possuindo versatilidade de aplicação - capacidade de utilização em camadas mais ou menos espessas, criando empastes. Esta pesquisa consiste na aplicação de pigmentos oriundos das indústrias do plástico e papel, no restauro de policromias. Foram testados os seguintes pigmentos: carbonato de cálcio precipitado (PCC), carbonato de cálcio natural (GCC), caulino natural, caulino calcinado, talco, dióxido de titânio e um pigmento comercial, existente no mercado e destinado especificamente para reintegração. Os pigmentos caracterizaram-se relativamente às suas propriedades físicas e tecnológicas, tendo sido testados isoladamente e entre si, com o objectivo de melhorar características individuais. Os pigmentos foram aglutinados em diferentes ligantes: medium para restauro, verniz de retoque e Paraloid B72® a 3% em xileno. A aplicação foi feita sobre uma camada de preparação tradicional. Foram estudadas diversas características dos pigmentos: facilidade de aplicação (a pincel e espátula), facilidade de mistura, poder de cobertura e facilidade de aquisição. Testou-se também a capacidade de mistura com um pigmento colorido – ocre – cujas características foram analisadas de acordo com os parâmetros definidos anteriormente. Após a fase experimental, os pigmentos e misturas seleccionados foram estudados recorrendo a diferentes análises: estratigrafia, análise da superfície, testes de envelhecimento, Hunter-Lab, microscopia electrónica de varrimento (SEM) e difracção de raios X (XRD). A análise dos resultados permitiu o estudo das diferentes características dos pigmentos e garantir a estabilidade da mistura seleccionada. Os resultados demonstraram que o pigmento com maior potencialidade de aplicação consiste na mistura de dióxido de titânio (TiO2) e carbonato de cálcio natural (GCC), na proporção de 25:75. ABSTRACT: In the beginning of the 19th century and mainly due to the Industrial Revolution, new materials for painting were developed. New synthetic pigments emerged, putting aside the classical ones, which were difficult to obtain and very expensive. These new pigments were not always the best choice, but they were easy to get and much cheaper. Nowadays the pigment industry is much more reliable and accurate, however the distance between industry, conservators and artists is larger then a few decades – with few exceptions. The main goal of this work was to find an alternative to the existing white pigments for restoration, but also to find pigments that can be applied by contemporary artists, due to its multiple characteristics: ability to be used in a thin transparent layer or in a thick one, creating an impasto effect. The purpose of this research consisted on applying new white pigments, mainly used by plastic and paper industries, in the restoration of polychrome layers. The following pigments were tested: precipitated calcium carbonates (PCC), ground calcium carbonates (GCC), kaolin, calcined kaolin, talc, titanium dioxide and a commercial pigment. These pigments were characterized mainly in terms of physical and technological properties and were applied alone and with other pigments with the main goal to find synergies. The pigments and mixtures were blended with different mediums: medium for restoration, retouching varnish and Paraloid B72® (3%) in xylene and applied over the ground layer. Several characteristics were studied such has an easy application (with brush and spatula), an easy medium blending, a good covering power and simple buying access. Then a coloured pigment was added - yellow ochre - to the selected pigments and mixtures, which were again analysed for the characteristic above specified. After the experimental phase, the selected pigments and their mixtures were studied by different techniques: cross-section, surface analysis, aging tests, Hunter-Lab, SEM (scanning electron microscopy) and XRD (X-ray diffraction). Finally, all the results were carefully analysed and it was possible to understand the different behaviours and to guarantee the stability of the selected pigments. The results showed that the best pigments were titanium dioxide and ground calcium carbonate (GCC), applied in a blending formulation of 25% TiO2: 75% GCC.
Branco, Ana Filipa do Rosário. "Utilização e caracterização de anticorpos para identificação de ligandos proteicos em pinturas de cavalete." Master's thesis, Universidade de Évora, 2014. http://hdl.handle.net/10174/13001.
Full textGonçalves, Susana Cavaleiro Ferreira Nobre. "André Gonçalves e a pintura de cavalete em Portugal no tempo de D. João V (1706-1750)-o caminho da internacionalização." Master's thesis, Instituições portuguesas -- UL-Universidade de Lisboa -- -Faculdade de Letras, 2002. http://dited.bn.pt:80/30125.
Full textHÄUSL, VAD Soňa. "PEDAGOGIKA MARIE MONTESSORIOVÉ A JEJÍ VYUŽITÍ V NÁBOŽENSKÉ VÝUCE." Master's thesis, 2008. http://www.nusl.cz/ntk/nusl-47365.
Full textDias, Pedro Miguel Miranda. "Reabilitação da Estrutura de Betão Armado do Cavalete de S. Vicente." Master's thesis, 2019. https://hdl.handle.net/10216/121980.
Full textTrindade, António Oriol. "Um olhar sobre a perspectiva linear em Portugal nas pinturas de cavalete, tectos e abóbadas : 1470-1816." Doctoral thesis, 2008. http://sibul.reitoria.ul.pt/F/?func=item-global&doc_library=ULB01&type=03&doc_number=000539355.
Full textResumo alargado em português e em inglês disponível no documento
Carvalho, Carina Real. "Proposta de um novo consolidante para suporte de madeira em pintura de cavalete com solventes de baixa toxicidade." Master's thesis, 2020. http://hdl.handle.net/10451/44210.
Full textSantos, Helena Ferreira Pinto Pinheiro de Melo Dias dos. "O pintor Francisco João (Act.1563-1595) : materiais e técnicas na pintura de cavalete em Évora na segunda metade do século XVI." Doctoral thesis, 2012. http://hdl.handle.net/10400.14/14977.
Full textCaetano, Joaquim Inácio 1951. "Motivos decorativos de estampilha na pintura a fresco dos séculos XV e XVI no norte de Portugal : relações entre pintura moral e de cavalete." Doctoral thesis, 2010. http://hdl.handle.net/10451/2829.
Full textEsta dissertação tem como matéria de trabalho as pinturas a fresco dos séculos XV e XVI no Norte de Portugal, com o objectivo de estudar os padrões decorativos executados com estampilha. É um trabalho que tem como ponto de partida a conservação e restauro de pintura mural, nas oportunidades de observação que esta permite, actividade que desenvolvemos desde o início dos anos 80. A identificação dos padrões e seu cotejo com padrões de outras pinturas, permitiu-nos identificar vários grupos de pinturas com afinidades entre si, tendo-se vindo a verificar que cada um destes grupos constitui o corpus de várias oficinas activas neste período e território. Simultaneamente, apercebemo-nos da existência, nos espaços religiosos, de vestígios de outras “modas” decorativas, como a cor directamente aplicada na arquitectura ou o modo de tratar as juntas dos aparelhos construtivos, que consideramos serem manifestações decorativas anteriores ao período de grande produção da pintura mural a fresco, por volta da primeira metade do século XVI, fazendo com esta um caminho, em termos de gosto, que antecede as primeiras construções românicas sendo, precisamente, sintetizado na pintura a fresco através da sua representação na própria pintura, imitando também os brocados e panos de armar que revestiram as paredes e que, sendo um dos momentos deste percurso, já só os podemos avaliar por essas representações pictóricas. Na análise das suas formas, percebemos que a maioria dos padrões inventariados tem um referente visual, podendo-se encontrar semelhanças com formas de outras gramáticas decorativas como o Românico, Gótico, Mudéjar ou imitam desenhos de brocados. Neste cotejo constante com padrões de outras proveniências, encontrámos o mesmo padrão, batido com a mesma estampilha, em pintura a fresco e em pintura de cavalete, deduzindo tratar-se de produção da mesma oficina. Identificámos, assim, algumas oficinas que pintam os dois géneros, o que seria prática comum.
This dissertation focuses on the fresco paintings of the XV and XVI centuries in the North of Portugal with the aim of studying decorative patterns executed with transfer print. It is a study which generates from the conservation and restoration of mural painting and the observational opportunities it offers, an activity we have been developing since the beginning of the 1980s. The identification and collation of patterns in regard to patterns in other paintings have allowed us to identify various groups of paintings which share affinities. We later found each of these groups constituted the corpus of several mural painting studios working actively in this time period and location. We were simultaneously aware of the existence of traces, particularly in religious spaces, of other decorative “fads” such as colour directly applied onto architecture or the manner in which the joints of the construction systems were handled. We find these “fads” to be prior to the period of great production of fresco mural painting around the first half of the XVI century, preceding the first romanesque constructions, whose nature is synthesized in fresco painting through its representation in painting itself, through the imitation of brocade and wall hanging tapestry which would cover walls, vestiges of which exist only in pictorical representation. We also noted the majority of the patterns taken into inventory have a visual referent and show similarities with other forms of decorative grammar such as the romanesque, gothic or mudejar styles, or imitation of brocade design. In this constant collation with patterns of other origins we found the same pattern, stamped with the same stamp on fresco panting and easel painting, therefore deducing it all to be produced by the same studio. We also referenced other cases of studios that paint both genres, which would be common practice.
Yin, Ooi Su. "Labelling of proteinaceous binders in art." Doctoral thesis, 2019. http://hdl.handle.net/10174/25920.
Full textMorais, Rita Machado Maltieira de Almeida. "A tela na pintura portuguesa : materiais e técnicas, do século XV ao século XIX." Doctoral thesis, 2016. http://hdl.handle.net/10400.14/24174.
Full textThis thesis addresses canvas as a support for painting in Portugal. Concerning the area of conservation, this pictorial support is investigated from a material and technical point of view, through a set of ninety and six existing works in museums and other institutions where the Portuguese painting is well represented. Covering both religious and civil typologies, this research focuses on the evolution of the use of canvas, initially with the distemper technique, through an exemplar of late fifteenth century, and then with the oil painting technique, through paintings from late sixteenth century to late eighteenth century, when the industrial revolution promotes a new period to painting on canvas. From the technical and material point of view, the investigation focused on direct and detailed in situ observation of the reverse of paintings and involved a quantitative and qualitative analysis of the canvas. These were carried out with the support of visible light, digital photography of the front and reverse of paintings and with the use of a thread-count. The formal characteristics of the canvas were examined and micro-samples of it were collected and analysed by optical microscopy, to identify the material present. In relation to the distemper painting on canvas, the opportunity to analyse some of the constituent materials by optical microscopy, SEM-EDS and μ-FTIR, allowed to identify the raw material of the canvas, as well as some of the pigments, grounds and binder present. The approach confirmed the uniqueness of this painting, whose pictorial technique preceded the use of oil in this weaved support. For a better understanding of canvas, the traditional process of weaving in a handloom was discussed and fibres and traditional fabrics used as paintings supports were related with specific international and national artistic periods. The information gathered in this interdisciplinary approach was contextualized through coeval treatises and national and European custom of the use of canvas in the painting. It sought, with that, answer to questions about the choice of certain materials and woven structures, about cloth sizes and paintings’ dimensions, about marks and stamps on canvas over the period investigated and, therefore, relate them with preferences of local artists and also insert them in European pictorial practice. The presentation of these results allowed outlining a first idea of the distinguishing features of the canvas as fundamental elements for national painting, a subject that matters to deepen in the future, given to its influence on pictorial technique.
Alves, Stefan Ferreira. "Radiografia-X de pintura : fundamentos radiológicos, parâmetros radiográficos e potencialidades interpretativas." Master's thesis, 2015. http://hdl.handle.net/10400.14/23670.
Full textThis study aims to develop the knowledge about the application of X-radiographs to easel painting, focusing on those with wood and canvas supports. An historical perspective is drawn, from the discovery of X-rays by Wilhelm Röntgen, through the following radiological and radiographic impact, to the implementation in the field of art works. It is described the radiological basis involved in this type of examination, concerning the nature of electromagnetic radiation, the way X-rays are produced and the resultant phenomena of its interaction with matter. Every radiographic factor is evaluated such as the nature of the radiation, the instrumental parameters, geometrical and placements issues or the inclusion of additional structures, and then proceed to the systematic description of its impact on image quality, whether in analogic film, as on digital support. In the reading component of the data, it is outlined a specific methodology of image interpretation, being described and explored specific case studies that illustrate the ability to supply new information on easel painting, by this non-destructive exam.
Silva, Joana Santos Lima da. "Ângelo de Sousa’s photographic and film collection: strategies for the preservation of colour slide-based artworks." Doctoral thesis, 2019. http://hdl.handle.net/10362/87080.
Full textBranco, Carolina de Bruges Bettencourt Meneses. "Tratamento de rasgões e lacunas em suporte de tela : retrato equestre de D. Miguel e representação de São josé." Master's thesis, 2016. http://hdl.handle.net/10400.14/21535.
Full textThis dissertation had as objectives to develop two aspects: on the one hand, the study historical, artistic, technical and material of two paintings on canvas, as well as performing an intervention of conservation and restoration, planned in advance, undertake a review of the methodology used for the treatment of tear mending and testing for the comparison of different adhesives and its application in cotton and linen canvas. As regards the two paintings, from Terceira Island, in the Azores islands, the first one refers to an equestrian representation of D. Miguel I, oil on canvas, probably painted around 1802-1866. The second painting portrays St Joseph with the child at his breast, painted probably with a binder aqueous medium, signed Valentina and dated 1926. Both were studied from a historical, stylistic, formal and iconographic point of view. In view of the material and technical study of the works of art, began a photographic documentation and observation of their organoleptic characteristics, having been this complemented, only in the case of the equestrian portrait of D. Miguel I, with an analytical study. The laboratorial study had as objective the identification of pigments, loads and binders, using a variety of analytical techniques; optical microscopy (OM), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX) and Fourier transform infrared spectroscopy (μ-FTIR). After the analytical information collected that enabled a better knowledge of the constituent materials, a strategy of conservation and restoration was planned, appropriate to each case, which has been carried out, as it is exposed in this dissertation. Relating to the treatment of tear mending, which is the case of study of this paper, had as objectives to understand the most suitable techniques for the success of this kind of procedures, taking as a starting point the cotton canvas, which constitutes the support of the two paintings. For such, there were prepared test pieces in cotton and linen, which were submitted to tests with several adhesives, aqueous non aqueous, whose results were compared with the information available in previous studies.
Dias, Alfredo Manuel Ramos. "O retrato de D. Frei António de Sousa, Bispo do Porto : 1758 – 1766 : sistema de tensão de suporte têxtil." Master's thesis, 2020. http://hdl.handle.net/10400.14/33603.
Full textThe present work is the result of the study and intervention of conservation and restoration of an oil painting on canvas, dated between the end of the 18th century and the beginning of the 19th century, portraying the Bishop of Porto, D. Frei António de Sousa. Included in a collection of portraits of bishops from the diocese of Porto, it is exhibited in the Gallery of Bishops, in the Paço do Bispo do Porto, presently at the chapel antechamber. The painting presented pathologies essentially associated with constant fluctuations in relative humidity (HR) of the air, such as blooming varnish, cracking and structural deformations. The latter were defined by uneven tensions throughout the painting, stretcher marks and an inadequate setting system. During the process of varnish removal it was possible to identify elements and colours of the composition until then, imperceptible or misinterpreted and with the construction of a humidity chamber it was possible to flatten the painting structure, with the support of a temporary working stretcher. Challenged by the difficulty of controlling environmental conditions, which cause conservation problems common to all the paintings found in this building and in many others in similar institutions due to the architectural characteristics and/or budget constraints, we developed a textile support tension system that could minimize the negative effects on the canvas. Conceived to be accessible to all, at low cost and able to be used in any conservation and restoration workshop; capable of responding to the needs of tension changes, due to the action of humidity and with constant presentation of the real value of the forces exerted in the painting, in N (newtons). The final prototype was the result of several tests of different models, which allowed to evaluate and improve the system that allows tensioning a canvas without static attachment points, at low tension values and guaranteeing constant tension. Despite the disinterested contribution, to all those who want to use this construction solution in a workshop, a technical design was developed for mass production of a final model, hoping to obtain funding for patent registration, matrix production and commercialization of this product. This production can be carried out using metallurgical extrusion or, in a new approach that we intend to continue to develop, through 3D printing. Thus, the aim is to provide the market with a solution capable of responding to most works of art and without the need for the conservator-restorer to be limited to personalized orders and production times.