Vinicius Da Silva - Academia.edu (original) (raw)
Papers by Vinicius Da Silva
This work investigates the use of neural networks admitting high-order derivatives for modeling d... more This work investigates the use of neural networks admitting high-order derivatives for modeling dynamic variations of smooth implicit surfaces. For this purpose, it extends the representation of differentiable neural implicit surfaces to higher dimensions, which opens up mechanisms that allow to exploit geometric transformations in many settings, from animation and surface evolution to shape morphing and design galleries. The problem is modeled by a kkk-parameter family of surfaces ScS_cSc, specified as a neural network function f:mathbbR3timesmathbbRkrightarrowmathbbRf : \mathbb{R}^3 \times \mathbb{R}^k \rightarrow \mathbb{R}f:mathbbR3timesmathbbRkrightarrowmathbbR, where ScS_cSc is the zero-level set of the implicit function f(cdot,c):mathbbR3rightarrowmathbbRf(\cdot, c) : \mathbb{R}^3 \rightarrow \mathbb{R} f(cdot,c):mathbbR3rightarrowmathbbR, with cinmathbbRkc \in \mathbb{R}^kcinmathbbRk, with variations induced by the control variable ccc. In that context, restricted to each coordinate of mathbbRk\mathbb{R}^kmathbbRk, the underlying representation is a neural homotopy which is the solution of a general partial differential equation.
We introduce a neural implicit framework that bridges discrete differential geometry of triangle ... more We introduce a neural implicit framework that bridges discrete differential geometry of triangle meshes and continuous differential geometry of neural implicit surfaces. It exploits the differentiable properties of neural networks and the discrete geometry of triangle meshes to approximate them as the zero-level sets of neural implicit functions. To train a neural implicit function, we propose a loss function that allows terms with high-order derivatives, such as the alignment between the principal directions, to learn more geometric details. During training, we consider a non-uniform sampling strategy based on the discrete curvatures of the triangle mesh to access points with more geometric details. This sampling implies faster learning while preserving geometric accuracy. We present the analytical differential geometry formulas for neural surfaces, such as normal vectors and curvatures. We use them to render the surfaces using sphere tracing. Additionally, we propose a network opt...
2021 34th SIBGRAPI Conference on Graphics, Patterns and Images (SIBGRAPI), 2021
This survey presents methods that use neural networks for implicit representations of 3D geometry... more This survey presents methods that use neural networks for implicit representations of 3D geometry — neural implicit functions. We explore the different aspects of neural implicit functions for shape modeling and synthesis. We aim to provide a theoretical analysis of 3D shape reconstruction using deep neural networks and introduce a discussion between researchers interested in this research field.
Visualization of individual CNVs within the CNVRs with the lowest P-value in the association test... more Visualization of individual CNVs within the CNVRs with the lowest P-value in the association tests. Visualization of individual CNVs within the CNVR on ECA10:12,948,489-13,075,518 (association test including both gains and losses), ECA20:30,624,048-30,689,273 (association test including gains only) and ECA20:30,743,179-30,775,429 (association test including losses only). Each row represents one horse and the X-axis is the position on the chromosome. The black line marks the location of the CNVR. Blue lines represent controls, red lines cases. A dotted line represents a deletion (stateâ =â 0n), a striped line represents a CNV with state equals 1n and a solid line represents a duplication (3n). (DOCX 50 kb)
CNVs randomly selected based on incidence and size validated through qPCR. CNVR identification, c... more CNVs randomly selected based on incidence and size validated through qPCR. CNVR identification, chromosome (ECA), start and end position (in bp) and size of the CNVs in the investigated Friesians horse sample is presented, including information on whether the CNV concerned a private (present in 1 horse) or shared (present in 2 horses; the exact same breakpoints were observed) CNV. The designed primers, state of the CNV and results of the qPCR are given. (DOCX 14 kb)
Multidimensional scaling plot of 276 genotyped Friesian horses. Multidimensional scaling plot of ... more Multidimensional scaling plot of 276 genotyped Friesian horses. Multidimensional scaling plot of 276 genotyped Friesian horses calculated with cluster and mds-plot commands in PLINK software v1.07 [28, 29] using autosomal SNPs. (DOCX 31 kb)
International cooperation, or internationalization more broadly, is a key aspect of fundamental r... more International cooperation, or internationalization more broadly, is a key aspect of fundamental research and graduate studies in law, being present more and more in strategic plans of law schools across Canada. There is no doubt COVID-19 will influence internationalization, in fact it is already affecting ongoing projects and the recruitment of graduate students. As most scholars, we had to alter our immediate plans for international conferences, summer schools and research collaborations with colleagues abroad. Last February, when borders started to close in Europe and the effects of the COVID-19 reached Canada, we were both celebrating grants for two South American visiting professors and putting on hold the planning of their visits next year. We put in applications for international mobility grants to help financing the fieldworks of graduate students in the Summer 2021, but we were a bit sceptical on how this would unfold in practice. After the universities closed in Canada, we ...
Enfermagem contemporânea: construindo novos saberes, 2021
Acta Physica Sinica, 2021
Computers & Graphics, 2020
This paper presents a novel path tracer algorithm for immersive visualization of Riemannian manif... more This paper presents a novel path tracer algorithm for immersive visualization of Riemannian manifolds. To do this, we introduce Riemannian illumination, a generalization of classical Computer Graphics illumination models. In this context, global light transport is expressed by extending the rendering equation to Riemannian manifolds. Using Monte Carlo integration to solve this equation results in the novel path tracer for Non-Euclidean spaces. We discuss its basic principles, as well as the general CPU algorithm. Additionally, we discuss in detail how to implement a GPU version, using the RTX pipeline. Finally, we apply the algorithm to render "photorealistic" inside views of the flat torus, Poincaré sphere, and the hyperbolic mirrored dodecahedron. These are examples of Euclidean, spherical, and hyperbolic spaces: the Thurston classical geometries.
Produção em Foco, 2012
O objetivo deste trabalho é demonstrar as condições de trabalho da atividade de jardinagem e pais... more O objetivo deste trabalho é demonstrar as condições de trabalho da atividade de jardinagem e paisagismo de uma empresa localizada em Florianópolis-SC, um setor de serviços ainda pouco explorado em pesquisas nacionais. Para tanto, utilizou-se como ferramenta metodológica a Análise Ergonômica do Trabalho (AET), aplicada em dois trabalhadores da empresa de paisagismo e jardinagem analisada. Pode-se verificar que o ambiente de trabalho característico deste tipo de atividade, que se difere a cada serviço prestado, bem como os equipamentos utilizados, são fatores que podem contribuir e comprometer a saúde destes trabalhadores. Assim sendo, buscou-se não somente identificar e diagnosticar os problemas ergonômicos através da análise da tarefa e das atividades destes profissionais como também propor recomendações quem venham a prevenir possíveis riscos ocupacionais ou acidentes de trabalho com consequentes afastamentos da atividade laboral.
XXXII Congresso Brasileiro de Neurocirurgia, 2018
XXXII Congresso Brasileiro de Neurocirurgia, 2018
Journal of Thoracic Oncology, 2017
Nephron, 2016
Aichi cohort study of prognosis in patients newly initiated into dialysis (AICOPP) group (Nagoya)... more Aichi cohort study of prognosis in patients newly initiated into dialysis (AICOPP) group (Nagoya) 44 Influence of Gender and Repeated Urine Sampling on the Association of Albuminuria with Coronary Events
Sports biomechanics / International Society of Biomechanics in Sports, Jan 5, 2016
Reaction time and response time are considered important abilities and can potentially affect com... more Reaction time and response time are considered important abilities and can potentially affect combat performance. This study investigated the effect of a specific fatigue protocol on reaction time, response time, performance time, and kick impact. Seven male athletes reported to the laboratory on two different days. During day one, athletes performed a specific progressive taekwondo test, and on day two, a protocol for determining reaction time, response time, performance time, and kick impact before and after a time to exhaustion test at an intensity level corresponding to the maximal kick frequency obtained during the specific progressive taekwondo test. Muscle activation from rectus femoris and kick impact of the preferred limb were assessed. No differences were observed for response time and performance time. However, kick impact decreased (43 ± 27 to 13 ± 10 g, p < 0.01) while reaction time increased (145 ± 51 to 223 ± 133 ms, p < 0.05). Moderate correlation was observed ...
Priscilla Cristina Cabral Ribeiro Universidade Federal de Ouro Preto Escola de Minas DEPRO Ca... more Priscilla Cristina Cabral Ribeiro Universidade Federal de Ouro Preto Escola de Minas DEPRO Campus Universitário Morro do Cruzeiro Bauxita Ouro Preto Minas Gerais CEP 35400-00 priscri@em.ufop.br ... Gustavo Peixoto Silva Universidade Federal de Ouro ...
Procedia Manufacturing, 2015
Since the 1990s, higher education institutions have introduced initiatives regarding environmenta... more Since the 1990s, higher education institutions have introduced initiatives regarding environmental management, given that higher education institutions play a significant role in the instruction and the mentality of current generations. In this regard, we have environmental education, which aims to, continually and actively, develop mindfulness, awareness of the need to keep the environment as sustainable as possible, seeking alternatives to prevailing problems, thus creating means to sustain and intensify actions of improvement and maintenance towards nature's preservation. Therefore, in this context, this article has demonstrated, through a bibliographical investigation, the dynamic by which the Higher Education Institutions present the Environmental Management subject as well as to locate in the literature authors who study this theme and the HEIs which already apply the protection and the concern for the environment in which they are inserted in their quotidian. These actions influence directly and indirectly the awareness of all the people involved in the process. In this research, we also present ideas and suggestions from authors, analyzing themes such as solid and organic residue, the proper use of water and the matter of recycling, among others. We have attempted to present this data through a chart that represents our findings. As a main result, we have identified that some HEIs present in their daily routine some indicators, which induce the preservation of the environment, engendering a dayby-day commitment with the cause.
Diet and Nutrition in Palliative Care, 2011
Bulletin et mémoires de l'Académie royale de médecine de Belgique, 2000
Interleukin-5 produced by Th2-type lymphocytes is involved in the pathogenesis of several hypereo... more Interleukin-5 produced by Th2-type lymphocytes is involved in the pathogenesis of several hypereosinophilic disorders. We have identified clonal Th2 cells in the peripheral blood of three patients with the idiopathic hypereosinophilic syndrome. Costimulatory signaling through B7/CD28 and LFA-3/CD2 pathways cooperates with an autocrine interleukin-2/interleukin-2 receptor loop for the survival and proliferation of these Th2 cells, as well as their production of cytokines, independently of T cell receptor engagement. The high-level of spontaneous apoptosis displayed by these cells was inhibited by interleukin-2 and interferon-g. New therapeutic strategies could result from our observations. Indeed, the hypereosinophilic syndrome may represent an unexpected indication for new immunomodulatory molecules such as CTLA4-Ig and anti-il-2 receptor antibodies.
This work investigates the use of neural networks admitting high-order derivatives for modeling d... more This work investigates the use of neural networks admitting high-order derivatives for modeling dynamic variations of smooth implicit surfaces. For this purpose, it extends the representation of differentiable neural implicit surfaces to higher dimensions, which opens up mechanisms that allow to exploit geometric transformations in many settings, from animation and surface evolution to shape morphing and design galleries. The problem is modeled by a kkk-parameter family of surfaces ScS_cSc, specified as a neural network function f:mathbbR3timesmathbbRkrightarrowmathbbRf : \mathbb{R}^3 \times \mathbb{R}^k \rightarrow \mathbb{R}f:mathbbR3timesmathbbRkrightarrowmathbbR, where ScS_cSc is the zero-level set of the implicit function f(cdot,c):mathbbR3rightarrowmathbbRf(\cdot, c) : \mathbb{R}^3 \rightarrow \mathbb{R} f(cdot,c):mathbbR3rightarrowmathbbR, with cinmathbbRkc \in \mathbb{R}^kcinmathbbRk, with variations induced by the control variable ccc. In that context, restricted to each coordinate of mathbbRk\mathbb{R}^kmathbbRk, the underlying representation is a neural homotopy which is the solution of a general partial differential equation.
We introduce a neural implicit framework that bridges discrete differential geometry of triangle ... more We introduce a neural implicit framework that bridges discrete differential geometry of triangle meshes and continuous differential geometry of neural implicit surfaces. It exploits the differentiable properties of neural networks and the discrete geometry of triangle meshes to approximate them as the zero-level sets of neural implicit functions. To train a neural implicit function, we propose a loss function that allows terms with high-order derivatives, such as the alignment between the principal directions, to learn more geometric details. During training, we consider a non-uniform sampling strategy based on the discrete curvatures of the triangle mesh to access points with more geometric details. This sampling implies faster learning while preserving geometric accuracy. We present the analytical differential geometry formulas for neural surfaces, such as normal vectors and curvatures. We use them to render the surfaces using sphere tracing. Additionally, we propose a network opt...
2021 34th SIBGRAPI Conference on Graphics, Patterns and Images (SIBGRAPI), 2021
This survey presents methods that use neural networks for implicit representations of 3D geometry... more This survey presents methods that use neural networks for implicit representations of 3D geometry — neural implicit functions. We explore the different aspects of neural implicit functions for shape modeling and synthesis. We aim to provide a theoretical analysis of 3D shape reconstruction using deep neural networks and introduce a discussion between researchers interested in this research field.
Visualization of individual CNVs within the CNVRs with the lowest P-value in the association test... more Visualization of individual CNVs within the CNVRs with the lowest P-value in the association tests. Visualization of individual CNVs within the CNVR on ECA10:12,948,489-13,075,518 (association test including both gains and losses), ECA20:30,624,048-30,689,273 (association test including gains only) and ECA20:30,743,179-30,775,429 (association test including losses only). Each row represents one horse and the X-axis is the position on the chromosome. The black line marks the location of the CNVR. Blue lines represent controls, red lines cases. A dotted line represents a deletion (stateâ =â 0n), a striped line represents a CNV with state equals 1n and a solid line represents a duplication (3n). (DOCX 50 kb)
CNVs randomly selected based on incidence and size validated through qPCR. CNVR identification, c... more CNVs randomly selected based on incidence and size validated through qPCR. CNVR identification, chromosome (ECA), start and end position (in bp) and size of the CNVs in the investigated Friesians horse sample is presented, including information on whether the CNV concerned a private (present in 1 horse) or shared (present in 2 horses; the exact same breakpoints were observed) CNV. The designed primers, state of the CNV and results of the qPCR are given. (DOCX 14 kb)
Multidimensional scaling plot of 276 genotyped Friesian horses. Multidimensional scaling plot of ... more Multidimensional scaling plot of 276 genotyped Friesian horses. Multidimensional scaling plot of 276 genotyped Friesian horses calculated with cluster and mds-plot commands in PLINK software v1.07 [28, 29] using autosomal SNPs. (DOCX 31 kb)
International cooperation, or internationalization more broadly, is a key aspect of fundamental r... more International cooperation, or internationalization more broadly, is a key aspect of fundamental research and graduate studies in law, being present more and more in strategic plans of law schools across Canada. There is no doubt COVID-19 will influence internationalization, in fact it is already affecting ongoing projects and the recruitment of graduate students. As most scholars, we had to alter our immediate plans for international conferences, summer schools and research collaborations with colleagues abroad. Last February, when borders started to close in Europe and the effects of the COVID-19 reached Canada, we were both celebrating grants for two South American visiting professors and putting on hold the planning of their visits next year. We put in applications for international mobility grants to help financing the fieldworks of graduate students in the Summer 2021, but we were a bit sceptical on how this would unfold in practice. After the universities closed in Canada, we ...
Enfermagem contemporânea: construindo novos saberes, 2021
Acta Physica Sinica, 2021
Computers & Graphics, 2020
This paper presents a novel path tracer algorithm for immersive visualization of Riemannian manif... more This paper presents a novel path tracer algorithm for immersive visualization of Riemannian manifolds. To do this, we introduce Riemannian illumination, a generalization of classical Computer Graphics illumination models. In this context, global light transport is expressed by extending the rendering equation to Riemannian manifolds. Using Monte Carlo integration to solve this equation results in the novel path tracer for Non-Euclidean spaces. We discuss its basic principles, as well as the general CPU algorithm. Additionally, we discuss in detail how to implement a GPU version, using the RTX pipeline. Finally, we apply the algorithm to render "photorealistic" inside views of the flat torus, Poincaré sphere, and the hyperbolic mirrored dodecahedron. These are examples of Euclidean, spherical, and hyperbolic spaces: the Thurston classical geometries.
Produção em Foco, 2012
O objetivo deste trabalho é demonstrar as condições de trabalho da atividade de jardinagem e pais... more O objetivo deste trabalho é demonstrar as condições de trabalho da atividade de jardinagem e paisagismo de uma empresa localizada em Florianópolis-SC, um setor de serviços ainda pouco explorado em pesquisas nacionais. Para tanto, utilizou-se como ferramenta metodológica a Análise Ergonômica do Trabalho (AET), aplicada em dois trabalhadores da empresa de paisagismo e jardinagem analisada. Pode-se verificar que o ambiente de trabalho característico deste tipo de atividade, que se difere a cada serviço prestado, bem como os equipamentos utilizados, são fatores que podem contribuir e comprometer a saúde destes trabalhadores. Assim sendo, buscou-se não somente identificar e diagnosticar os problemas ergonômicos através da análise da tarefa e das atividades destes profissionais como também propor recomendações quem venham a prevenir possíveis riscos ocupacionais ou acidentes de trabalho com consequentes afastamentos da atividade laboral.
XXXII Congresso Brasileiro de Neurocirurgia, 2018
XXXII Congresso Brasileiro de Neurocirurgia, 2018
Journal of Thoracic Oncology, 2017
Nephron, 2016
Aichi cohort study of prognosis in patients newly initiated into dialysis (AICOPP) group (Nagoya)... more Aichi cohort study of prognosis in patients newly initiated into dialysis (AICOPP) group (Nagoya) 44 Influence of Gender and Repeated Urine Sampling on the Association of Albuminuria with Coronary Events
Sports biomechanics / International Society of Biomechanics in Sports, Jan 5, 2016
Reaction time and response time are considered important abilities and can potentially affect com... more Reaction time and response time are considered important abilities and can potentially affect combat performance. This study investigated the effect of a specific fatigue protocol on reaction time, response time, performance time, and kick impact. Seven male athletes reported to the laboratory on two different days. During day one, athletes performed a specific progressive taekwondo test, and on day two, a protocol for determining reaction time, response time, performance time, and kick impact before and after a time to exhaustion test at an intensity level corresponding to the maximal kick frequency obtained during the specific progressive taekwondo test. Muscle activation from rectus femoris and kick impact of the preferred limb were assessed. No differences were observed for response time and performance time. However, kick impact decreased (43 ± 27 to 13 ± 10 g, p < 0.01) while reaction time increased (145 ± 51 to 223 ± 133 ms, p < 0.05). Moderate correlation was observed ...
Priscilla Cristina Cabral Ribeiro Universidade Federal de Ouro Preto Escola de Minas DEPRO Ca... more Priscilla Cristina Cabral Ribeiro Universidade Federal de Ouro Preto Escola de Minas DEPRO Campus Universitário Morro do Cruzeiro Bauxita Ouro Preto Minas Gerais CEP 35400-00 priscri@em.ufop.br ... Gustavo Peixoto Silva Universidade Federal de Ouro ...
Procedia Manufacturing, 2015
Since the 1990s, higher education institutions have introduced initiatives regarding environmenta... more Since the 1990s, higher education institutions have introduced initiatives regarding environmental management, given that higher education institutions play a significant role in the instruction and the mentality of current generations. In this regard, we have environmental education, which aims to, continually and actively, develop mindfulness, awareness of the need to keep the environment as sustainable as possible, seeking alternatives to prevailing problems, thus creating means to sustain and intensify actions of improvement and maintenance towards nature's preservation. Therefore, in this context, this article has demonstrated, through a bibliographical investigation, the dynamic by which the Higher Education Institutions present the Environmental Management subject as well as to locate in the literature authors who study this theme and the HEIs which already apply the protection and the concern for the environment in which they are inserted in their quotidian. These actions influence directly and indirectly the awareness of all the people involved in the process. In this research, we also present ideas and suggestions from authors, analyzing themes such as solid and organic residue, the proper use of water and the matter of recycling, among others. We have attempted to present this data through a chart that represents our findings. As a main result, we have identified that some HEIs present in their daily routine some indicators, which induce the preservation of the environment, engendering a dayby-day commitment with the cause.
Diet and Nutrition in Palliative Care, 2011
Bulletin et mémoires de l'Académie royale de médecine de Belgique, 2000
Interleukin-5 produced by Th2-type lymphocytes is involved in the pathogenesis of several hypereo... more Interleukin-5 produced by Th2-type lymphocytes is involved in the pathogenesis of several hypereosinophilic disorders. We have identified clonal Th2 cells in the peripheral blood of three patients with the idiopathic hypereosinophilic syndrome. Costimulatory signaling through B7/CD28 and LFA-3/CD2 pathways cooperates with an autocrine interleukin-2/interleukin-2 receptor loop for the survival and proliferation of these Th2 cells, as well as their production of cytokines, independently of T cell receptor engagement. The high-level of spontaneous apoptosis displayed by these cells was inhibited by interleukin-2 and interferon-g. New therapeutic strategies could result from our observations. Indeed, the hypereosinophilic syndrome may represent an unexpected indication for new immunomodulatory molecules such as CTLA4-Ig and anti-il-2 receptor antibodies.