Petrophysics applied in mineralizations, hydrothermal alterations and lithology mapping: a case study from the Zn‐Pb (Cu‐Ag) Epithermal Deposit of Santa Maria, Brazil

Author(s):  
Moriá Caroline Araújo ◽  
Adalene Moreira Silva ◽  
Paola Ferreira Barbosa ◽  
João Henrique Boniatti ◽  
Allan Früchting ◽  
...  
Author(s):  
Leonardo Baglioni ◽  
Federico Fallavollita

AbstractThe present essay investigates the potential of generative representation applied to the study of relief perspective architectures realized in Italy between the sixteenth and seventeenth centuries. In arts, and architecture in particular, relief perspective is a three-dimensional structure able to create the illusion of great depths in small spaces. A method of investigation applied to the case study of the Avila Chapel in Santa Maria in Trastevere in Rome (Antonio Gherardi 1678) is proposed. The research methodology can be extended to other cases and is based on the use of a Relief Perspective Camera, which can create both a linear perspective and a relief perspective. Experimenting mechanically and automatically the perspective transformations from the affine space to the illusory space and vice versa has allowed us to see the case study in a different light.


Author(s):  
Concetta Cusano ◽  
Andrea Montanino ◽  
Claudia Cennamo ◽  
Giulio Zuccaro ◽  
Maurizio Angelillo
Keyword(s):  

Author(s):  
L. Barazzetti ◽  
R. Brumana ◽  
D. Oreni ◽  
M. Previtali ◽  
F. Roncoroni

This paper presents a photogrammetric methodology for true-orthophoto generation with images acquired from UAV platforms. The method is an automated multistep workflow made up of three main parts: (i) image orientation through feature-based matching and collinearity equations / bundle block adjustment, (ii) dense matching with correlation techniques able to manage multiple images, and true-orthophoto mapping for 3D model texturing. It allows automated data processing of sparse blocks of convergent images in order to obtain a final true-orthophoto where problems such as self-occlusions, ghost effects, and multiple texture assignments are taken into consideration. <br><br> The different algorithms are illustrated and discussed along with a real case study concerning the UAV flight over the Basilica di Santa Maria di Collemaggio in L'Aquila (Italy). The final result is a rigorous true-orthophoto used to inspect the roof of the Basilica, which was seriously damaged by the earthquake in 2009.


2013 ◽  
Vol 3 (4) ◽  
pp. 142-154
Author(s):  
P. SCHRIPPE ◽  
F.S.B. MEDEIROS ◽  
C.D. SCHIMITH ◽  
A.D. WEISE

Author(s):  
Tainara Da Silva Guimarães ◽  
Rita de Cássia Pistóia Mariani

ResumoO presente trabalho parte da seguinte questão: quais entendimentos são mobilizados por estudantes surdxs em tarefas sobre números racionais utilizando o material manipulável tangram? Diante disso, tem-se por objetivo analisar registros de representação semiótica mobilizados por estudantes surdxs do 1º ano do Ensino Médio, em uma escola estadual bilíngue de Santa Maria/RS, considerando uma sequência de tarefas envolvendo números racionais nas interpretações parte-todo, medida e operador. Para tanto, caracteriza-se como uma pesquisa qualitativa na forma de um estudo de caso com produção de dados orientada pelos princípios da análise de conteúdo. Nessa perspectiva constitui-se quatro categorias: parte-todo, equivalência, medida e operador. Quanto a parte-todo constata-se que a partir da conversão da representação figural icônica para numérica fracionária, sua compreensão deu-se principalmente. Na equivalência de números racionais verifica-se a relevância de tratamentos figurais na representação icônica, por meio da mobilização de registros das peças do tangram. Em relação a medida conclui-se que houve compreensão no espaço unidimensional, ao identificar os números racionais correspondentes aos valores das áreas abordadas como a distância de um certo ponto até a origem na reta numérica, e no espaço bidimensional, a partir da medida da área de figuras. No operador, observa-se reduções de áreas de figuras geométricas quadradas, evidenciando tratamentos figurais na representação icônica. Por fim, destaca-se ampliação do repertório linguístico dxs estudantes referentes aos conceitos/conteúdos matemáticos, tendo em vista a convenções de sinais institucionalizados durante a dinamização da sequência. Palavras-chave: Educação de Surdos. Ensino Médio. Tangram. Parte-Todo. Medida. Operador. AbstractThe present paper starts from the following question: what understandings are mobilized by deaf students in tasks about rational numbers using the manipulable tangram material? Therefore, the objective is to analyze semiotic representation records mobilized by deaf students of the first year of high school, in a bilingual state school in Santa Maria/RS, considering a sequence of tasks involving rational numbers in the interpretations part-whole, measure and operator. For this purpose, it is characterized as a qualitative research in the form of a case study with data production guided by the principles of content analysis. From this perspective, four categories are constituted: part-whole, equivalence, measure and operator. As for the whole-part it is found that from the conversion of the iconic figural representation to fractional numerical, its understanding took place mainly. In the equivalence of rational numbers, the relevance of figurative treatments in iconic representation is verified through the mobilization of records of tangram pieces. With respect the measurement, it can be concluded that there was understanding in one-dimensional space, by identifying the rational numbers corresponding to the values of the approached areas as the distance from a certain point to the origin in the numerical line, and in two-dimensional space, from the measurement of the area of figures. In the operator, there are reductions in areas of square geometric figures, showing figurative treatments in the iconic representation. Finally, we highlight the expansion of the linguistic repertoire of students referring to mathematical concepts/contents, in view of the conventions of institutionalized signals during the dynamization of the sequence. Keywords: Deaf Education. High School. Tangram. Part Whole. Measure. Operator.


Leonardo ◽  
2019 ◽  
Vol 52 (1) ◽  
pp. 44-53 ◽  
Author(s):  
Justin Underhill

This essay explores the relationship between pictures and the lighting conditions in which they were originally viewed. The theoretical interrelationship between brightness, illumination and depiction is explored in a case study of Leonardo da Vinci’s Last Supper mural at the refectory of Santa Maria delle Grazie in Milan. Advanced rendering software allows for the reconstruction of the refectory as it stood when Leonardo painted The Last Supper and demonstrates the complex interaction between light and space in the mural. This analysis illustrates how digital humanities might bridge traditional art-historical methods and forensic visualization.


2019 ◽  
Vol 9 (23) ◽  
pp. 5148 ◽  
Author(s):  
Alessandro Grazzini

Diagnostics is a very important tool of knowledge in the field of historical buildings. In particular, non-destructive techniques allow to deepen the study of the mechanical characteristics of the historical walls without compromising the artistic value of the monumental building. A case study of the use of sonic and impact tests was described, performed using the same instrumented hammer, for the characterization of the masonry walls at the Sanctuary of Santa Maria delle Grazie at Varoni, one of the churches damaged in the 2016 Amatrice earthquake. Sonic tests showed the presence of a discontinous masonry texture, as well as confirming the ineffectiveness of the strengthening work made by injections of lime mortar. The impact test allowed us to obtain the elastic modulus of the omogeneous stones of the masonry. The results obtained from the non-destructive techniques were confirmed by the flat jacks test carried out on the building, confirming the great potential of the non-destructive diagnostics suitable for analyzing important structural parameters without affecting the preservation of historical masonry structures.


2012 ◽  
Vol 55 (4) ◽  
pp. 939-959
Author(s):  
LIISE LEHTSALU

ABSTRACTEighteenth-century convents are little studied, and women's third order houses even less so, despite the growing numbers of the latter. Through a case-study, this article explores the origins and functions of one eighteenth-century third order house in an Italian urban community. Relying on the rich meeting minutes of Santa Maria Egiziaca in Bologna, the article analyses the everyday realities and the changing perceptions of women's religious institutions among the urban elites connected to the house. Santa Maria Egiziaca emerges as neither only a convent nor a shelter, the two institutional types recognized in current scholarship, but rather as both. The diverse goals of the house's administrators and benefactors suggest why third order houses thrived in the eighteenth century when more traditional convents came under increasing criticism and declined.


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