Estimativa de Recursos de Carvão Utilizando Métodos Geoestatísticos

This paper presents a geostatical method for resources estimation of a coal seam. The coal seam is refered to as “I” and belongs to Leão-Butiá coal deposit, located at central east region of Rio Grande do Sul State, southernmost Brazil. data set are composed by 182 measures of coal seam thickness obtained by drill holes. To evaluate seam thickness, initially in this work, was approached the basic descriptive statistic about the sampled data set. To continue, spatial continuity analysis was performed and to conclude was carried out an ordinary kriging estimation process. Considering the tree previous process was accomplished a block kriging that allowed estimate mean and variance of seam thickness and extension of sampled total area. With this data it was possible to calculate the coal seam volume. Knowing coal local density and multiplying it by the volume determines coal seam quantities (ton) for which a confidence interval was estimated. To compare estimate and true values a cross validation was made, using the model of kriging and the sampled data set. A histogram is presented to show the average error for the model that should be null to confirm the process.

Autonomous RPCs for a Cosmic Ray ground array

We report on the behaviour of Resistive Plate Chambers (RPC) developed for muon detection in ultra-high energy cosmic ray (UHECR) experiments. The RPCs were developed for the MARTA project and were tested on field conditions. These RPCs cover an area of $1.5 \times 1.2\,{m^2}$ and are instrumented with 64 pickup electrodes providing a segmentation better than $20\,$cm. By shielding the detector units with enough slant mass to absorb the electromagnetic component in the air showers, a clean measurement of the muon content is allowed, a concept to be implemented in a next generation of UHECR experiments. The operation of a ground array detector poses challenging demands, as the RPC must operate remotely under extreme environmental conditions, with limited budgets for power and minimal maintenance. The RPC, DAQ, High Voltage and monitoring systems are enclosed in an aluminium-sealed case, providing a compact and robust unit suited for outdoor environments, which can be easily deployed and connected. The RPCs developed at LIP-Coimbra are able to operate using a very low gas flux, which allows running them for few years with a small gas reservoir. Several prototypes have already been built and tested both in the laboratory and outdoors. We report on the most recent tests done in the field that show that the developed RPCs have operated in a stable way for more than 2 years in field conditions.Comment: To appear in the proceedings of the 35th International Cosmic Ray Conference (ICRC2017), Busan, South Korea. Presented by R. Concei\c{c}\~{a}o. 8 page

LEVANTAMENTO DE SEIO MAXILAR UTILIZANDO OSSO AUTÓGENO E OSSO LIOFILIZADO COM PRP

 Levantamento de seio maxilar tem se mostrado uma eficiente alternativa para devolver sitio cirúrgico para posterior reabilitação com implantes. O PRP quando misturado com osso particulado, transforma o material de enxertia em algo mecanicamente mais fácil de manipular, com maior volume e estabilidade.  Propriedades osteogênicas sempre foram citadas como vantagens do PRP, porém a literatura atual nos leva a desacreditar em tais propriedades. Paciente procurou a Universidade Federal do Paraná com objetivo de enxertia para posterior distribuição de implantes para confecção de um protocolo superior. Devido a pequena disponibilidade de enxerto autógeno em ramo e mento, a equipe optou para retirada de um pequeno bloco em ramo mandibular e misturar com osso liofilizado. O tratamento foi complementado com a utilização de PRP. Após seis meses, podemos constatar uma excelente imagem radiografia que nos sugerem um ótimo sítio para colocação de implantes. Além do que foi citado anteriormente, a técnica cirúrgica utilizada desde a retirada do sangue do paciente pelo farmacêutico até a obtenção do meio adequado para osseointegração de futuros implantes

Distribution of alien tetrapods in the Iberian Peninsula

We present a dataset that assembles occurrence records of alien tetrapods (amphibians, reptiles, birds and mammals) in the Iberian Peninsula, a coherent biogeographically unit where introductions of alien species have occurred for millennia. These data have important potential applications for ecological research and management, including the assessment of invasion risks, formulation of preventive and management plans, and research at the biological community level on alien species. This dataset summarizes inventories and data sources on the taxonomy and distribution of alien tetrapods in the Iberia Peninsula, comprising known locations from published literature, expert knowledge and citizen science platforms. An expert-based assessment process allowed the identification of unreliable records (misclassification or natural dispersion from native range), and the classification of species according to their status of reproduction in the wild. Distributional data was harmonized into a common area unit, the 10 × 10 km Universal Transverse Mercator (UTM) system (n = 6,152 cells). The year of observation and/or year of publication were also assigned to the records. In total, we assembled 35,940 unique distribution records (UTM × species × Year) for 253 species (6 amphibians, 16 reptiles, 218 birds and 13 mammals), spanning between 1912 and 2020. The species with highest number of distribution records were the Mediterranean painted frog Discoglossus pictus (n = 59 UTM), the pond slider Trachemys scripta (n = 471), the common waxbill Estrilda astrild (n = 1,275) and the house mouse Mus musculus (n = 4,043), for amphibians, reptiles, birds and mammals, respectively. Most alien species recorded are native to Africa (33%), followed by South America (21%), Asia (19%), North America (12%) and Oceania (10%). Thirty-six species are classified by IUCN as threatened in their native range, namely 2 Critically Endangered (CR), 6 Endangered (EN), 8 Vulnerable (VU), and 20 species Near Threatened (NT). Species maps are provided in DataSet1, as well R code and GIS layers to update them as new records are obtained.Fundação para a Ciência e a Tecnologia BPD/115968/2016, UIDB/50027/2020, UID/AMB/50017/201

Coronary Obstruction Following Transcatheter Aortic Valve Implantation for Degenerative Bioprosthetic Surgical Valves: a Systematic Literature Review

ABSTRACTBackgroundVery few data exist on coronary obstruction following transcatheter aortic valve implantation (TAVI) for degenerative bioprosthetic valves (valve-in-valve [ViV]). The present trial evaluated, through a systematic review of the literature, the clinical characteristics, management and clinical outcomes of patients with coronary obstruction after ViV-TAVI.MethodsStudies published between 2002 and 2013 evaluating coronary obstruction as a complication of ViV-TAVI were identified using a systematic electronic search. Data on the clinical and procedural characteristics, management of the complication, and clinical outcomes were analyzed.ResultsA total of four publications describing seven patients were identified. Most patients (71%) were women, with mean age of 82±5 years, and STS-PROM score of 9.4±2.6%. Mean left coronary artery (LCA) ostium height and aortic root width were 8.8±1.5mm and 28.0±5.0mm, respectively. Most patients had stented bioprosthetic valves with externally mounted leaflets or stentless aortic bioprosthesis, and the LCA was involved in all patients. Percutaneous coronary intervention (PCI) was attempted in all patients and was successful in four (57%). In-hospital mortality was 42.9% (three cases), all of them after failed PCI.ConclusionsCoronary obstruction following ViV-TAVI occurred more frequently in women with stented bioprosthetic valves with externally mounted leaflets or with stentless bioprosthesis. The LCA was involved in all cases and PCI was successful in 60% of them. Continued efforts may help identify the factors associated with this complication so that appropriate prevention measures may be implemented

UTILIZAÇÃO DE ENXERTOS ÓSSEOS AUTÓGENOS EM CIRURGIA E TRAUMATOLOGIA BUCO-MAXILO-FACIAIS

A falta de osso nos rebordos alveolares tem sido um grande problema na recuperação estético-funcional em pacientes que tenham sofrido traumatismos dentoalveolares, extrações dentárias traumáticas, ausências dentárias congênita, patologias que envolvam os maxilares, além de infecções, sendo esta falta de osso uma das limitações para a reabilitação com implantes, por apresentar um volume ósseo inadequado para a estabilidade inicial. Os enxertos ósseos autógenos são geralmente indicados em combinação com implantes para restauração desses pacientes. Além disso, os pacientes com reabsorção moderada e objetivos protéticos ideais também podem exigir um aumento ósseo. Segundo MISCH (2000), o objetivo habitual dos enxertos ósseos autógenos é fornecer osso disponível suficiente para permitir a inserção dos implantes endósseos nos maxilares comprometidos, ou sanar as necessidades e os desejos estéticos e/ou protético do paciente com reabsorção moderada. Os enxertos autógenos permitem a inserção do implante endósseo com maior área de superfície, altura, quantidade e localização melhor, sendo obtido de sítios doadores diferentes do próprio corpo e de diferentes formas

ENUCLEAÇÃO DE CISTO DO DUCTO NASOPALATINO E IMPLANTE EM MESMA SESSÃO

O cisto do ducto nasopalatino é a variedade mais comum de cistos fissurais, originando-se de restos epiteliais aprisionados durante o desenvolvimento do conducto nasopalatino, podendo abranger toda a sua extensão. São descobertos exclusivamente nos exames radiográficos como área radiolúcida, redonda ou oval de bordos bem definidos localizados na linha média. Normalmente são assintomáticos a não ser que sofram infecção secundária, apresentam pequenas dimensões não existindo relatos de transformações malignas, o que justifica apenas a proservação, quando indicado, a remoção cirúrgica deve ser procedida. Os autores descrevem um caso de cisto do ducto nasopalatino em paciente do sexo feminino, leucoderma, 30 anos, saudável no qual foi indicada a remoção cirúrgica devido a instalação de implante osteointegrável na região de incisivo central ausente. Foi realizada a cirurgia de enucleação do cisto sob anestesia local e preenchimento da cavidade com osso autógeno removido do ramo mandibular e imediata instalação do implante osteointegrável. Após um ano do procedimento cirúrgico, constatou-se total neoformação óssea na região do cisto e sucesso na estabilidade do implante, conseguindo suprir a necessidade estética causada pela ausência do incisivo central

EXTRAÇÃO SEMI-AUTOMÁTICA DE RODOVIAS EM UM PAR DE IMAGENS AÉREAS DIGITAIS UTILIZANDO GEOMETRIA EPIPOLAR E PROGRAMAÇÃO DINÂMICA

The purpose of this paper is to introduce a methodology for semi-automatic road extraction from aerial digital image pairs by using dynamic programming and epipolar geometry. The method uses both images from where each road feature pair is extracted. The operator identifies the corresponding road features and s/he selects sparse seed points along them. After all road pairs have been extracted, epipolar geometry is applied to determine the automatic point-to-point correspondence between each correspondent feature. Finally, each correspondent road pair is georeferenced by photogrammetric intersection. Experiments were made with rural aerial images. The results led to the conclusion that the methodology is robust and efficient, even in the presence of shadows of trees and buildings or other irregularities.O objetivo deste trabalho é propor uma metodologia de extração semi-automática de rodovias em um par de imagens aéreas digitais utilizando programação dinâmica e geometria epipolar. Este processo é aplicado em ambas as imagens para extrair cada par de feições (rodovias), cabendo ao operador identificar as rodovias correspondentes e fornecer esparsos pontos sementes ao longo das mesmas. Após a extração de todos os pares de rodovias, o conceito de geometria epipolar é usado para a determinação automática de correspondência ponto a ponto entre cada par de feições correspondentes. Finalmente, a conhecida metodologia de intersecção fotogramétrica é utilizada para georreferenciar cada par de rodovias correspondentes. Experimentos foram realizados com imagens aéreas rurais, sendo que os resultados obtidos permitiram concluir que a metodologia é robusta e eficaz, mesmo em situações que envolvem obstruções por sombras de árvores, edificações ou outras irregularidades

Autonomous RPCs for a Cosmic Ray ground array

We report on the behaviour of Resistive Plate Chambers (RPC) developed for muon detection in ultra-high energy cosmic ray (UHECR) experiments. The RPCs were developed for the MARTA project and were tested on field conditions. These RPCs cover an area of $1.5 \times 1.2\,{m^2}$ and are instrumented with 64 pickup electrodes providing a segmentation better than $20\,$cm. By shielding the detector units with enough slant mass to absorb the electromagnetic component in the air showers, a clean measurement of the muon content is allowed, a concept to be implemented in a next generation of UHECR experiments. The operation of a ground array detector poses challenging demands, as the RPC must operate remotely under extreme environmental conditions, with limited budgets for power and minimal maintenance. The RPC, DAQ, High Voltage and monitoring systems are enclosed in an aluminium-sealed case, providing a compact and robust unit suited for outdoor environments, which can be easily deployed and connected. The RPCs developed at LIP-Coimbra are able to operate using a very low gas flux, which allows running them for few years with a small gas reservoir. Several prototypes have already been built and tested both in the laboratory and outdoors. We report on the most recent tests done in the field that show that the developed RPCs have operated in a stable way for more than 2 years in field conditions.Peer Reviewe

REABILITAÇÃO DE MAXILA UTILIZANDO ENXERTO AUTÓGENO INTRABUCAL - RELATO DE CASO

O planejamento protético de um rebordo alveolar edêntulo muitas vezes prevê a reconstrução óssea visando a otimização de fatores estéticos, funcionais e biomecânicos. Dentro desse raciocínio, para todo rebordo que sofre atrofia considera-se tal possibilidade. O rebordo alveolar deficiente leva freqüentemente ao posicionamento incorreto dos implantes, acarretando margem gengival imperfeita e, conseqüentemente, resultados insatisfatórios (FRANCISCHONE, 2006). Este trabalho tem o objetivo de apresentar o caso clínico da paciente que apresenta ausência dentária na arcada superior em região de incisivos, com perda óssea considerável do rebordo. Dessa forma, optou-se por reabilitação do rebordo maxilar com suficiente quantidade de osso na região de incisivos, utilizando enxerto autógeno de ramo mandibular em bloco. Concluímos que, o cirurgião deve elaborar um bom planejamento em reconstruções para a reabilitação com implantes, com o objetivo de obter informações sobre os limites de cada técnica frente à necessidade do caso, e, com isso, garantir previsibilidade e êxito das técnicas de enxertia na região bucomaxilofacial