Ensaios sísmicos de reflexao rasa em rochas fraturadas do Grupo Itararé - Bacia do Paraná

Orientador: Augustinho RigotiCo-orientadores: Sidnei Pires Rostirolla e Ciro Jorge AppiDissertaçao (mestrado) - Universidade Federal do Paraná, Setor de Ciencias da Terra, Programa de Pós-Graduaçao em Geologia. Defesa: Curitiba, 2004Inclui bibliografiaÁrea de concentraçao: Geologia exploratóri

Further evidence of tetragonality in bainitic ferrite

There is growing evidence that bainitic ferrite which retains a substantial amount of carbon in solid solution does not have cubic symmetry. We provide additional data on a different nanostructured bainitic steel to support this evidence, based on synchrotron X-ray diffraction experiments. The data are consistent only with a displacive transformation mechanism for bainite.We would like to thank Rolls-Royce plc and the Engineering and Physical Sciences Research Council for their support during this project.This is the final version of the article. It first appeared from Maney Publishing via http://dx.doi.org/10.1179/1743284714Y.000000069

Different Deformation Mechanisms Leading to Auxetic Behavior Exhibited by Missing Rib Square Grid Structures

This is the author accepted manuscript. The final version is available from Wiley via the DOI in this recordAn extensive investigation is carried out on the missing rib square grid structure using finite element simulations. This showed that, in the cases considered in this study, the type of deformation is primarily dependent on the ratio of the thickness of different ribs with the structure behaving like an anti-tetrachiral at particular ratios. The analysis also showed that the ability of the structure to deform predominantly through the bending of the ligament allows it to achieve much more negative values of the Poisson's ratio than previously reported. Confirmation of the numerical results is obtained through experimental methods involving the 3D printing of representative structures which are subsequently subjected to compression.European Regional Development Fun

SHALLOW REFLECTION SEISMIC SURVEY: A STUDY OF THE VILA VELHA SANDSTONE IN THE STATE OF PARANÁ, BRAZIL

A técnica de sísmica de reflexão rasa é analisada como aplicação no imageamento de potencialreservatório fraturado. Os métodos, procedimentos e equipamentos utilizados neste tipo de trabalho sãodescritos de forma crítica. O levantamento sísmico passou inicialmente pela aquisição de dados de refraçãoe análise de ruído para prover informações da resposta sísmica da área. Assim, definiram-se os parâmetrosa ser empregados na aquisição dos dados de sísmica de reflexão rasa de alta resolução, que constitui oobjeto principal da pesquisa. O processamento dos dados é feito de forma expedita, apenas para possibilitara correlação com a geologia e validar a escolha dos parâmetros de aquisição. Os resultados sísmicos sãocorrelacionados com os de poço e mapeamento. A sísmica de reflexão rasa é assim pioneiramente utilizadacomo ferramenta no imageamento de arenitos fraturados do Grupo Itararé, gerando imagens sísmicas queauxiliam no entendimento da geologia da área e subsidiam o estudo de modelagem de uma situaçãoaflorante, análoga a potenciais reservatórios fraturados.Shallow depth reflection seismic is analyzed with respect to its applicability to imaging a fracturedpotential reservoir. Methods, procedures and equipments used in this type of survey are critically discussed.Initially, refraction and walkaway data were acquired to provide information on the seismic response of thestudy area and so determining the high resolution, shallow depth reflection seismic acquisition parameters,which constitutes the main target of the research. A quick data processing is carried out simply to allow for thecorrelation of the seismic data with geological information and to validate the choice of the acquisitionparameters. Seismic results are correlated with borehole and surface geology data. The use of shallow depthreflection seismic is so applied for the first time to make the image of the fractured sandstones of the ItararéGroup, generating seismic images which contribute to the geological knowledge of the study area and givesupport to the study of outcrops which resemble fractured potential reservoirs

Deformation mechanisms in bulk nanostructured aluminum obtained after cryomilling and consolidation by spark plasma sintering

Bimodal bulk nanocristalline (nc)/ultrafine (UF) aluminum was produced after cryomilling and spark plasma sintering consolidation process. The samples obtainedwere plastically deformed in uniaxial compression. We show that there is a significant fraction of plastic strain (11%) that can be recovered after unloading. High-energy synchrotron X-ray diffraction experiments revealed that, there is a correlation between plastic strain recovery and microstructural evolution detected during in-situ loading-unloading experiments. Using a deconvolution approach, the nanostructured volume fraction (grain size below 100 nm) and the UF counterpart (grain size above 100-150 nm)were separated in terms of lattice strain, microstrain, crystallite size and crystallographic texture. During loading-unloading cycles we observe a lattice strain splitting between nc and UF volume fractions, a complete recovery of the peak broadening and a recovery of texture. These intriguing phenomena were explained to be strictly correlated with the lattice strain splitting behavior which act as the driving force for dislocation recombination

Eficácia no uso de "PRF" (Platelet-Rich Fibrin) no tratamento de quistos odontogénicos: revisão narrativa

Esta tese pretende examinar a eficácia do uso do Fibrina Rica em Plaquetas no tratamento de quistos odontogénicos. A utilização de Fibrina Rica em Plaquetas é uma terapia regenerativa que utiliza o próprio sangue do paciente para promover a cicatrização e regeneração de tecidos. Nesta revisão narrativa, vamos analisar estudos e evidências disponíveis sobre o uso do Fibrina Rica em Plaquetas em locas de quistos odontogénicos, explorando sua capacidade de acelerar a recuperação pós-cirúrgica, reduzir a inflamação e melhorar os resultados clínicos. Os resultados sugerem que o Fibrina Rica em Plaquetas pode ser uma opção promissora noa cicatrização após tratamento de quistos odontogénicos, oferecendo em alguns casos benefícios significativos em comparação com abordagens convencionais.This thesis aims to examine the effectiveness of using Platelet Rich Fibrin in the treatment of odontogenic cysts. The use of Platelet Rich Fibrin is a regenerative therapy that uses the patient's own blood to promote healing and tissue regeneration. In this narrative review, we will analyze studies and available evidence on the use of Platelet Rich Fibrin at odontogenic cyst sites, exploring its ability to accelerate postsurgical recovery, reduce inflammation, and improve clinical outcomes. The results suggest that Platelet Rich Fibrin may be a promising option in the healing after treatment of odontogenic cysts, bringing in some cases benefits compared to conventional approaches

Ensaios sísmicos de reflexao rasa em rochas fraturadas do Grupo Itararé - Bacia do Paraná

Orientador: Augustinho RigotiCo-orientadores: Sidnei Pires Rostirolla e Ciro Jorge AppiDissertaçao (mestrado) - Universidade Federal do Paraná, Setor de Ciencias da Terra, Programa de Pós-Graduaçao em Geologia. Defesa: Curitiba, 2004Inclui bibliografiaÁrea de concentraçao: Geologia exploratóri