1,741 results on '"Cristiano, F"'
Search Results
2. A Study on Binary Asteriod System Deflection
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Meireles, Lucas G., Prado, Antonio F. B. de A., Pereira, Maria Cecília, and de Melo, Cristiano F.
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Astrophysics - Earth and Planetary Astrophysics - Abstract
The study of asteroids, its composition and trajectories, has been a persistent interest in the space exploration community. In addition, they are also perceived as a great threat to life on Earth, considering the possibility of an impact with our planet. A considerable portion, around 15%, of the asteroid population are believed to be part of a double or triple asteroid system.
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- 2023
3. Topological engineered 3D printing of Architecturally Interlocked Petal-Schwarzites
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Ambekar, Rushikesh S., Bastos, Leonardo V., Galvao, Douglas S., Tiwary, Chandra S., and Woellner, Cristiano F.
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Condensed Matter - Materials Science - Abstract
The topologically engineered complex Schwarzites architecture has been used to build novel and unique structural components with a high specific strength. The mechanical properties of these building blocks can be further tuned, reinforcing with stronger and high surface area architecture. In the current work, we have built six different Schwarzites structures with multiple interlocked layers, which we named architecturally interlocked petal-schwarzites (AIPS). These complex structures are 3D printed into macroscopic dimensions and compressed using uniaxial compression. The experimental results show a strong dependency of mechanical response on the number of layers and topology of the layers. Fully atomistic molecular dynamics compressive simulations were also carried out, and the results are in good agreement with experimental observations. They can explain the underlying AIPS mechanism of high specific strength and energy absorption. The proposed approach opens a new perspective on developing new 3D-printed materials with tunable and enhanced mechanical properties., Comment: 22 pages and 9 figures
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- 2023
4. Mechanical Energy Absorption of Architecturally Interlocked Petal-Schwarzites
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Bastos, Leonardo V., Ambekar, Rushikesh S., Tiwary, Chandra S., Galvao, Douglas S., and Woellner, Cristiano F.
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Condensed Matter - Materials Science - Abstract
We carried out fully atomistic reactive molecular dynamics simulations to study the mechanical behavior of six newly proposed hybrid schwarzite-based structures (interlocked petal-schwarzites). Schwarzites are carbon crystalline nanostructures with negative Gaussian curvature created by mapping a TPMS (Triply Periodic Minimal Surface) with carbon rings containing six to eight atoms. Our simulations have shown that petal-schwarzite structures can withstand uni-axial compressive stress up to the order of GPa and can be compressed past 50 percent strain without structural collapse. Our most resistant hierarchical structure has a calculated compressive strength of 260~GPa and specific energy absorption (SEA) of 45.95 MJ/kg, while possessing a mass density of only 685 kg/m$^3$. These results show that these structures could be excellent lightweight materials for applications that require mechanical energy absorption.
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- 2023
5. Transforming 2D carbon allotropes into 3D ones through topological mapping: The case of biphenylene carbon (graphenylene)
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Tromer, Raphael M., Felix, Levi C., Baughmann, Ray H., Galvao, Douglas S., and Woellner, Cristiano F.
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Condensed Matter - Materials Science - Abstract
In this work, we propose a new methodology for obtaining 3D carbon allotrope structures from 2D ones through topological mapping. The idea is to select a 3D target structure and 'slice' it along different structural directions, creating a series of 2D structures. As a proof of concept, we chose the Tubulane structure 12-hexa(3,3) as a target. Tubulanes are 3D carbon allotropes based on cross-linked carbon nanotubes. One of obtained 2D 'sliced' structures was mapped into the biphenylene carbon (BPC). We showed that compressing BPC along different directions can generate not only the target Tubulane 12-hexa(3,3) but at least two other structures, bcc-C6 and an unreported member of the Tubulane family, which we called Tubulane X. The methodology proposed here is completely general, it can be used coupled with any quantum method. Considering that new 2D carbon allotropes, such as the biphenylene carbon network, which is closely related to BPC, have been recently synthesized, the approach proposed here opens new perspectives to obtain new 3D carbon allotropes from 2D structures.
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- 2023
6. Hydrogen atom/molecule adsorption on 2D metallic porphyrin: A first-principles study
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Tromer, Raphael M., Felix, Isaac M., Felix, Levi C., Machado, Leonardo D., Woellner, Cristiano F., and Galvao, Douglas S.
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Condensed Matter - Materials Science - Abstract
Hydrogen is a promising element for applications in new energy sources like fuel cells. One key issue for such applications is storing hydrogen. And, to improve storage capacity, understanding the interaction mechanism between hydrogen and possible storage materials is critical. This work uses DFT simulations to comprehensively investigate the adsorption mechanism of H/H$_2$ on the 2D metallic porphyrins with one transition metal in its center. Our results suggest that the mechanism for adsorption of H (H$_2$) is chemisorption (physisorption). The maximum adsorption energy for atomic hydrogen was $-3.7$ eV for 2D porphyrins embedded with vanadium or chromium atoms. Our results also revealed charge transfer of up $-0.43$ e to chemisorbed H atoms. In contrast, the maximum adsorption energy calculated for molecular hydrogen was $-122.5$ meV for 2D porphyrins embedded with scandium atoms. Furthermore, charge transfer was minimal for physisorption. Finally, we also determined that uniaxial strain has a minimal effect on the adsorption properties of 2D metallic porphyrins.
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- 2023
7. Capítulo 25: Hemiptera Linnaeus, 1758
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Grazia, Jocélia, primary, Takiya, Daniela Maeda, additional, Wolff, Vera Regina dos Santos, additional, Schwertner, Cristiano F., additional, Mejdalani, Gabriel, additional, Cavichioli, Rodney Ramiro, additional, Peronti, Ana Lucia B. G., additional, Queiroz, Dalva Luiz de, additional, Burckhardt, Daniel, additional, Fernandes, José A. M., additional, Moreira, Felipe F. F., additional, Gil-Santana, Hélcio R., additional, Ferreira, Paulo S. Fiuza, additional, Carrenho, Renan, additional, Brugnera, Ricardo, additional, and Guidoti, Marcus, additional
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- 2024
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8. Catálogo Taxonômico da Fauna do Brasil: Setting the baseline knowledge on the animal diversity in Brazil
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Walter A. Boeger, Michel P. Valim, Hussam Zaher, José A. Rafael, Rafaela C. Forzza, Alexandre R. Percequillo, Cristiana S. Serejo, André R.S. Garraffoni, Adalberto J. Santos, Adam Slipinski, Adelita M. Linzmeier, Adolfo R. Calor, Adrian A. Garda, Adriano B. Kury, Agatha C.S. Fernandes, Aisur I. Agudo-Padrón, Alberto Akama, Alberto M. da Silva Neto, Alejandro L. Burbano, Aleksandra Menezes, Alessandre Pereira-Colavite, Alexander Anichtchenko, Alexander C. Lees, Alexandra M.R. Bezerra, Alexandre C. Domahovski, Alexandre D. Pimenta, Alexandre L.P. Aleixo, Alexandre P. Marceniuk, Alexandre S. de Paula, Alexandre Somavilla, Alexandre Specht, Alexssandro Camargo, Alfred F. Newton, Aline A.S. da Silva, Aline B. dos Santos, Aline D. Tassi, Allan C. Aragão, Allan P.M. Santos, Alvaro E. Migotto, Amanda C. Mendes, Amanda Cunha, Amazonas Chagas Júnior, Ana A.T. de Sousa, Ana C. Pavan, Ana C.S. Almeida, Ana L.B.G. Peronti, Ana L. Henriques-Oliveira, Ana L. Prudente, Ana L. Tourinho, Ana M.O. Pes, Ana P. Carmignotto, Ana P.G. da Silva Wengrat, Ana P.S. Dornellas, Anamaria Dal Molin, Anderson Puker, André C. Morandini, André da S. Ferreira, André L. Martins, André M. Esteves, André S. Fernandes, André S. Roza, Andreas Köhler, Andressa Paladini, Andrey J. de Andrade, Ângelo P. Pinto, Anna C. de A. Salles, Anne I. Gondim, Antonia C.Z. Amaral, Antonio A.A. Rondón, Antonio Brescovit, Antônio C. Lofego, Antonio C. Marques, Antonio Macedo, Artur Andriolo, Augusto L. Henriques, Augusto L. Ferreira Júnior, Aurino F. de Lima, Ávyla R. de A. Barros, Ayrton do R. Brito, Bárbara L.V. Romera, Beatriz M.C. de Vasconcelos, Benjamin W. Frable, Bernardo F. Santos, Bernardo R. Ferraz, Brunno B. Rosa, Brunno H.L. Sampaio, Bruno C. Bellini, Bruno Clarkson, Bruno G. de Oliveira, Caio C.D. Corrêa, Caleb C. Martins, Camila F. de Castro-Guedes, Camilla Souto, Carla de L. Bicho, Carlo M. Cunha, Carlos A. de M. Barboza, Carlos A.S. de Lucena, Carlos Barreto, Carlos D.C.M. de Santana, Carlos E.Q. Agne, Carlos G.C. Mielke, Carlos H.S. Caetano, Carlos H.W. Flechtmann, Carlos J.E. Lamas, Carlos Rocha, Carolina S. Mascarenhas, Cecilia B. Margaría, Cecilia Waichert, Celina Digiani, Célio F.B. Haddad, Celso O. Azevedo, Cesar J. Benetti, Charles M.D. dos Santos, Charles R. Bartlett, Cibele Bonvicino, Cibele S. Ribeiro-Costa, Cinthya S.G. Santos, Cíntia E.L. Justino, Clarissa Canedo, Claudia C. Bonecker, Cláudia P. Santos, Claudio J.B. de Carvalho, Clayton C. Gonçalves, Cleber Galvão, Cleide Costa, Cléo D.C. de Oliveira, Cristiano F. Schwertner, Cristiano L. Andrade, Cristiano M. Pereira, Cristiano Sampaio, Cristina de O. Dias, Daercio A. de A. Lucena, Daiara Manfio, Dalton de S. Amorim, Dalva L. de Queiroz, Daniara Colpani, Daniel Abbate, Daniel A. Aquino, Daniel Burckhardt, Daniel C. Cavallari, Daniel de C. Schelesky Prado, Daniel L. Praciano, Daniel S. Basílio, Daniela de C. Bená, Daniela G.P. de Toledo, Daniela M. Takiya, Daniell R.R. Fernandes, Danilo C. Ament, Danilo P. Cordeiro, Darliane E. Silva, Darren A. Pollock, David B. Muniz, David I. Gibson, David S. Nogueira, Dayse W.A. Marques, Débora Lucatelli, Deivys M.A. Garcia, Délio Baêta, Denise N.M. Ferreira, Diana Rueda-Ramírez, Diego A. Fachin, Diego de S. Souza, Diego F. Rodrigues, Diego G. de Pádua, Diego N. Barbosa, Diego R. Dolibaina, Diogo C. Amaral, Donald S. Chandler, Douglas H.B. Maccagnan, Edilson Caron, Edrielly Carvalho, Edson A. Adriano, Edson F. de Abreu Júnior, Edson H.L. Pereira, Eduarda F.G. Viegas, Eduardo Carneiro, Eduardo Colley, Eduardo Eizirik, Eduardo F. dos Santos, Eduardo M. Shimbori, Eduardo Suárez-Morales, Eliane P. de Arruda, Elisandra A. Chiquito, Élison F.B. Lima, Elizeu B. de Castro, Elton Orlandin, Elynton A. do Nascimento, Emanuel Razzolini, Emanuel R.R. Gama, Enilma M. de Araujo, Eric Y. Nishiyama, Erich L. Spiessberger, Érika C.L. dos Santos, Eugenia F. Contreras, Eunice A.B. Galati, Evaldo C. de Oliveira Junior, Fabiana Gallardo, Fabio A. Hernandes, Fábio A. Lansac-Tôha, Fabio B. Pitombo, Fabio Di Dario, Fábio L. dos Santos, Fabio Mauro, Fabio O. do Nascimento, Fabio Olmos, Fabio R. Amaral, Fabio Schunck, Fábio S. P. de Godoi, Fabrizio M. Machado, Fausto E. Barbo, Federico A. Agrain, Felipe B. Ribeiro, Felipe F.F. Moreira, Felipe F. Barbosa, Fenanda S. Silva, Fernanda F. Cavalcanti, Fernando C. Straube, Fernando Carbayo, Fernando Carvalho Filho, Fernando C.V. Zanella, Fernando de C. Jacinavicius, Fernando H.A. Farache, Fernando Leivas, Fernando M.S. Dias, Fernando Mantellato, Fernando Z. Vaz-de-Mello, Filipe M. Gudin, Flávio Albuquerque, Flavio B. Molina, Flávio D. Passos, Floyd W. Shockley, Francielly F. Pinheiro, Francisco de A.G. de Mello, Francisco E. de L. Nascimento, Francisco L. Franco, Francisco L. de Oliveira, Francisco T. de V. Melo, Freddy R.B. Quijano, Frederico F. Salles, Gabriel Biffi, Gabriel C. Queiroz, Gabriel L. Bizarro, Gabriela Hrycyna, Gabriela Leviski, Gareth S. Powell, Geane B. dos Santos, Geoffrey E. Morse, George Brown, George M.T. Mattox, Geraldo Zimbrão, Gervásio S. Carvalho, Gil F.G. Miranda, Gilberto J. de Moraes, Gilcélia M. Lourido, Gilmar P. Neves, Gilson R.P. Moreira, Giovanna G. Montingelli, Giovanni N. Maurício, Gláucia Marconato, Guilherme E.L. Lopez, Guilherme L. da Silva, Guilherme Muricy, Guilherme R.R. Brito, Guilherme S.T. Garbino, Gustavo E. Flores, Gustavo Graciolli, Gustavo S. Libardi, Heather C. Proctor, Helcio R. Gil-Santana, Henrique R. Varella, Hermes E. Escalona, Hermes J. Schmitz, Higor D.D. Rodrigues, Hilton de C. Galvão Filho, Hingrid Y.S. Quintino, Hudson A. Pinto, Hugo L. Rainho, Igor C. Miyahira, Igor de S. Gonçalves, Inês X. Martins, Irene A. Cardoso, Ismael B. de Oliveira, Ismael Franz, Itanna O. Fernandes, Ivan F. Golfetti, Ivanklin S. Campos-Filho, Ivo de S. Oliveira, Jacques H.C. Delabie, Jader de Oliveira, Jadila S. Prando, James L. Patton, Jamille de A. Bitencourt, Janaina M. Silva, Jandir C. Santos, Janine O. Arruda, Jefferson S. Valderrama, Jeronymo Dalapicolla, Jéssica P. Oliveira, Jiri Hájek, João P. Morselli, João P. Narita, João P.I. Martin, Jocélia Grazia, Joe McHugh, Jorge J. Cherem, José A.S. Farias Júnior, Jose A.M. Fernandes, José F. Pacheco, José L.O. Birindelli, José M. Rezende, Jose M. Avendaño, José M. Barbanti Duarte, José R. Inácio Ribeiro, José R.M. Mermudes, José R. Pujol-Luz, Josenilson R. dos Santos, Josenir T. Câmara, Joyce A. Teixeira, Joyce R. do Prado, Juan P. Botero, Julia C. Almeida, Julia Kohler, Julia P. Gonçalves, Julia S. Beneti, Julian P. Donahue, Juliana Alvim, Juliana C. Almeida, Juliana L. Segadilha, Juliana M. Wingert, Julianna F. Barbosa, Juliano Ferrer, Juliano F. dos Santos, Kamila M.D. Kuabara, Karine B. Nascimento, Karine Schoeninger, Karla M. Campião, Karla Soares, Kássia Zilch, Kim R. Barão, Larissa Teixeira, Laura D. do N.M. de Sousa, Leandro L. Dumas, Leandro M. Vieira, Leonardo H.G. Azevedo, Leonardo S. Carvalho, Leonardo S. de Souza, Leonardo S.G. Rocha, Leopoldo F.O. Bernardi, Letícia M. Vieira, Liana Johann, Lidianne Salvatierra, Livia de M. Oliveira, Lourdes M.A. El-moor Loureiro, Luana B. Barreto, Luana M. Barros, Lucas Lecci, Lucas M. de Camargos, Lucas R.C. Lima, Lucia M. Almeida, Luciana R. Martins, Luciane Marinoni, Luciano de A. Moura, Luciano Lima, Luciano N. Naka, Lucília S. Miranda, Lucy M. Salik, Luis E.A. Bezerra, Luis F. Silveira, Luiz A. Campos, Luiz A.S. de Castro, Luiz C. Pinho, Luiz F.L. Silveira, Luiz F.M. Iniesta, Luiz F.C. Tencatt, Luiz R.L. Simone, Luiz R. Malabarba, Luiza S. da Cruz, Lukas Sekerka, Lurdiana D. Barros, Luziany Q. Santos, Maciej Skoracki, Maira A. Correia, Manoel A. Uchoa, Manuella F.G. Andrade, Marcel G. Hermes, Marcel S. Miranda, Marcel S. de Araújo, Marcela L. Monné, Marcelo B. Labruna, Marcelo D. de Santis, Marcelo Duarte, Marcelo Knoff, Marcelo Nogueira, Marcelo R. de Britto, Marcelo R.S. de Melo, Marcelo R. de Carvalho, Marcelo T. Tavares, Marcelo V. Kitahara, Marcia C.N. Justo, Marcia J.C. Botelho, Márcia S. Couri, Márcio Borges-Martins, Márcio Felix, Marcio L. de Oliveira, Marco A. Bologna, Marco S. Gottschalk, Marcos D.S. Tavares, Marcos G. Lhano, Marcus Bevilaqua, Marcus T.T. Santos, Marcus V. Domingues, Maria A.M. Sallum, María C. Digiani, Maria C.A. Santarém, Maria C. do Nascimento, María de los A.M. Becerril, Maria E.A. dos Santos, Maria I. da S. dos Passos, Maria L. Felippe-Bauer, Mariana A. Cherman, Mariana Terossi, Marie L.C. Bartz, Marina F. de C. Barbosa, Marina V. Loeb, Mario Cohn-Haft, Mario Cupello, Marlúcia B. Martins, Martin L. Christofersen, Matheus Bento, Matheus dos S. Rocha, Maurício L. Martins, Melissa O. Segura, Melissa Q. Cardenas, Mércia E. Duarte, Michael A. Ivie, Michael M. Mincarone, Michela Borges, Miguel A. Monné, Mirna M. Casagrande, Monica A. Fernandez, Mônica Piovesan, Naércio A. Menezes, Natalia P. Benaim, Natália S. Reategui, Natan C. Pedro, Nathalia H. Pecly, Nelson Ferreira Júnior, Nelson J. da Silva Júnior, Nelson W. Perioto, Neusa Hamada, Nicolas Degallier, Ning L. Chao, Noeli J. Ferla, Olaf H.H. Mielke, Olivia Evangelista, Oscar A. Shibatta, Otto M.P. Oliveira, Pablo C.L. Albornoz, Pablo M. Dellapé, Pablo R. Gonçalves, Paloma H.F. Shimabukuro, Paschoal Grossi, Patrícia E. da S. Rodrigues, Patricia O.V. Lima, Paul Velazco, Paula B. dos Santos, Paula B. Araújo, Paula K.R. Silva, Paula R. Riccardi, Paulo C. de A. Garcia, Paulo G.H. Passos, Paulo H.C. Corgosinho, Paulo Lucinda, Paulo M.S. Costa, Paulo P. Alves, Paulo R. de O. Roth, Paulo R.S. Coelho, Paulo R.M. Duarte, Pedro F. de Carvalho, Pedro Gnaspini, Pedro G.B. Souza-Dias, Pedro M. Linardi, Pedro R. Bartholomay, Peterson R. Demite, Petr Bulirsch, Piter K. Boll, Rachel M.M. Pereira, Rafael A.P.F. Silva, Rafael B. de Moura, Rafael Boldrini, Rafaela A. da Silva, Rafaela L. Falaschi, Ralf T.S. Cordeiro, Ramon J.C.L. Mello, Randal A. Singer, Ranyse B. Querino, Raphael A. Heleodoro, Raphael de C. Castilho, Reginaldo Constantino, Reinaldo C. Guedes, Renan Carrenho, Renata S. Gomes, Renato Gregorin, Renato J.P. Machado, Renato S. Bérnils, Renato S. Capellari, Ricardo B. Silva, Ricardo Kawada, Ricardo M. Dias, Ricardo Siewert, Ricaro Brugnera, Richard A.B. Leschen, Robert Constantin, Robert Robbins, Roberta R. Pinto, Roberto E. dos Reis, Robson T. da C. Ramos, Rodney R. Cavichioli, Rodolfo C. de Barros, Rodrigo A. Caires, Rodrigo B. Salvador, Rodrigo C. Marques, Rodrigo C. Araújo, Rodrigo de O. Araujo, Rodrigo de V.P. Dios, Rodrigo Johnsson, Rodrigo M. Feitosa, Roger W. Hutchings, Rogéria I.R. Lara, Rogério V. Rossi, Roland Gerstmeier, Ronald Ochoa, Rosa S.G. Hutchings, Rosaly Ale-Rocha, Rosana M. da Rocha, Rosana Tidon, Rosangela Brito, Roseli Pellens, Sabrina R. dos Santos, Sandra D. dos Santos, Sandra V. Paiva, Sandro Santos, Sarah S. de Oliveira, Sávio C. Costa, Scott L. Gardner, Sebastián A. Muñoz Leal, Sergio Aloquio, Sergio L.C. Bonecker, Sergio L. de S. Bueno, Sérgio M. de Almeida, Sérgio N. Stampar, Sérgio R. Andena, Sergio R. Posso, Sheila P. Lima, Sian de S. Gadelha, Silvana C. Thiengo, Simone C. Cohen, Simone N. Brandão, Simone P. Rosa, Síria L.B. Ribeiro, Sócrates D. Letana, Sonia B. dos Santos, Sonia C.S. Andrade, Stephane Dávila, Stéphanie Vaz, Stewart B. Peck, Susete W. Christo, Suzan B.Z. Cunha, Suzete R. Gomes, Tácio Duarte, Taís Madeira-Ott, Taísa Marques, Talita Roell, Tarcilla C. de Lima, Tatiana A. Sepulveda, Tatiana F. Maria, Tatiana P. Ruschel, Thaiana Rodrigues, Thais A. Marinho, Thaís M. de Almeida, Thaís P. Miranda, Thales R.O. Freitas, Thalles P.L. Pereira, Thamara Zacca, Thaynara L. Pacheco, Thiago F. Martins, Thiago M. Alvarenga, Thiago R. de Carvalho, Thiago T.S. Polizei, Thomas C. McElrath, Thomas Henry, Tiago G. Pikart, Tiago J. Porto, Tiago K. Krolow, Tiago P. Carvalho, Tito M. da C. Lotufo, Ulisses Caramaschi, Ulisses dos S. Pinheiro, Ulyses F.J. Pardiñas, Valéria C. Maia, Valeria Tavares, Valmir A. Costa, Vanessa S. do Amaral, Vera C. Silva, Vera R. dos S. Wolff, Verônica Slobodian, Vinícius B. da Silva, Vinicius C. Espíndola, Vinicius da Costa-Silva, Vinicius de A. Bertaco, Vinícius Padula, Vinicius S. Ferreira, Vitor C.P. da Silva, Vítor de Q. Piacentini, Vivian E. Sandoval-Gómez, Vivian Trevine, Viviane R. Sousa, Vivianne B. de Sant’Anna, Wayne N. Mathis, Wesley de O. Souza, Wesley D. Colombo, Wioletta Tomaszewska, Wolmar B. Wosiacki, Ximena M.C. Ovando, and Yuri L.R. Leite
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Biodiversity ,knowledge management ,taxonomy ,web services ,zoology ,Zoology ,QL1-991 - Abstract
ABSTRACT The limited temporal completeness and taxonomic accuracy of species lists, made available in a traditional manner in scientific publications, has always represented a problem. These lists are invariably limited to a few taxonomic groups and do not represent up-to-date knowledge of all species and classifications. In this context, the Brazilian megadiverse fauna is no exception, and the Catálogo Taxonômico da Fauna do Brasil (CTFB) (http://fauna.jbrj.gov.br/), made public in 2015, represents a database on biodiversity anchored on a list of valid and expertly recognized scientific names of animals in Brazil. The CTFB is updated in near real time by a team of more than 800 specialists. By January 1, 2024, the CTFB compiled 133,691 nominal species, with 125,138 that were considered valid. Most of the valid species were arthropods (82.3%, with more than 102,000 species) and chordates (7.69%, with over 11,000 species). These taxa were followed by a cluster composed of Mollusca (3,567 species), Platyhelminthes (2,292 species), Annelida (1,833 species), and Nematoda (1,447 species). All remaining groups had less than 1,000 species reported in Brazil, with Cnidaria (831 species), Porifera (628 species), Rotifera (606 species), and Bryozoa (520 species) representing those with more than 500 species. Analysis of the CTFB database can facilitate and direct efforts towards the discovery of new species in Brazil, but it is also fundamental in providing the best available list of valid nominal species to users, including those in science, health, conservation efforts, and any initiative involving animals. The importance of the CTFB is evidenced by the elevated number of citations in the scientific literature in diverse areas of biology, law, anthropology, education, forensic science, and veterinary science, among others.
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- 2024
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9. Estudo Randomizado Comparando a Ablação por Cateter com o PVAC Gold vs. Tratamento com Fármacos Antiarrítmicos em Pacientes Idosos com Fibrilação Atrial Sintomática
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Luiz Claudio Berhmann Martins, Cristiano F. Pisani, Fabio K. Dorfman, Francisco C. C. Darrieux, Tan C. Wu, Alberto P. Ferraz, Denise T. Hachul, Claudio Campi de Castro, Rogério Ruscitto do Prado, Luciana V. F. Souza, Luciana Sacilloto, Gabrielle D. A. Pessente, Cesar J. Grupi, Muhieddine Omar Chokr, Cesar H. Nomura, Kátia Rodrigues de Oliveira, Conrado P. Balbo, Sissy L. Melo, Pedro Veronese, and Mauricio I. Scanavacca
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Fibrilação Atrial ,Ablação por Cateter ,Antiarrítmicos ,Qualidade de Vida ,Acidente Vascular Cerebral ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Resumo Fundamento Não existem estudos randomizados comparando a manutenção do ritmo sinusal após ablação por cateter (AC) em relação ao tratamento com fármacos antiarrítmicos (AA) em pacientes idosos portadores fibrilação atrial (FA) paroxística. Objetivos Comparar os resultados clínicos do isolamento das veias pulmonares (VPs) com o cateter PVAC Gold de segunda geração com o uso de AA em idosos com FA paroxística sintomática, recorrente, apesar do uso de fármacos AA. Métodos Sessenta pacientes com FA paroxística ≥ 65 anos e sem cardiopatias estruturais foram randomizados para duas formas de tratamento: grupo 1: AC e grupo 2: AA. O desfecho primário foi a taxa livre de recorrência de FA após pelo menos um ano de seguimento. Os desfechos secundários foram: progressão para formas persistentes de FA, impacto na qualidade de vida (QVFA) e complicações. O nível de significância adotado na análise estatística foi de 5% (p
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- 2024
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10. The Effect of Element Composition on the Structural and Electronic Properties of Carbon, Silicon, Silicon Carbide, and Boron Nitride Gyroid Schwarzites
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Tromer, Raphael M., Felix, Levi C., Woellner, Cristiano F., and Galvao, Douglas S.
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Condensed Matter - Materials Science - Abstract
Schwarzites are porous structures that present negative Gaussian curvatures. Although initially proposed for carbon, in principle, schwarzites of other elements are possible. In this work, we have carried out a detailed investigation of the effect of element composition (C, Ge, Si, SiC, and BN) on the structural, electronic and optical properties of a gyroid schwarzite structure, the so-called G688. The DFT simulations were carried out using the well-known SIESTA code. Our results showed that formation energy values are in similar range of other related allotrope structures and are thermally stable (up to 1000~K). From the electronic analyses, our results indicate that all structures, except the carbon one, present semiconductor characteristics. From the optical properties, except for the infrared region where only silicon and germanium show some absorption, the other structures exhibit optical activity only in the visible and ultra-violet regions, and all of them have large refractive index values. For reflectivity, except for Si and Ge schwarzites that reflect almost 40\% of light, the other schwarzites exhibit low reflectivity. These characteristics make them good candidates for optoelectronic applications, such as infrared/ultraviolet absorbers, and ultraviolet blockers.
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- 2022
11. Low-cost Mars transfer from the Earth using solar sails and lunar swing-bys
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Meireles, Lucas G., Ribeiro, Rebeca S., de Melo, Cristiano F., and Prado, Antonio F. B. A.
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- 2023
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12. Optimal geometry for lunar swing-by maneuvers aided by solar sails in the restricted four-body problem
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Ribeiro, Rebeca S., Meireles, Lucas G., de Melo, Cristiano F., and Prado, Antonio F. B. A.
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- 2023
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13. Initial experience on cardiac magnetic resonance-aided VT ablation in South America
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Pisani, Cristiano F., Alexandre, Felipe Kalil, Kulchetscki, Rodrigo, Mayrink, Marina, Wu, Tan Chen, Chokr, Muhieddine, Hardy, Carina, Melo, Sissy Lara, Rochitte, Carlos, Nomura, Cesar, and Scanavacca, Mauricio
- Published
- 2023
- Full Text
- View/download PDF
14. Enhancing the taxonomic delimitation of Lippia origanoides Kunth (Verbenaceae) by analyzing volatile terpenes and molecular markers in micropropagated accessions
- Author
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Frattini, Laís M., Oliveira, Arthur A., Kotsubo, Jhoão S., Gorne, Íris B., Silva, Isabel C., Freitas, Jober C. E., Resende, Cristiano F., Mezzonato-Pires, Ana C., Matos, Elyabe M., Lopes, Juliana M. L., Viccini, Lyderson F., Grazul, Richard M., and Peixoto, Paulo H. P.
- Published
- 2024
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- View/download PDF
15. In silico analysis of non-structural protein 12 sequences from SARS-COV-2 found in Manaus, Amazonas, Brazil, reveals mutations linked to higher transmissibility
- Author
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FERNANDO B. ZANCHI, GABRIEL EDUARDO M. FERREIRA, LUIS ANDRÉ M. MARIÚBA, JULIANE C. GLÓRIA, VALDINETE A. DO NASCIMENTO, VICTOR C. DE SOUZA, ANDRÉ DE LIMA G. CORADO, FERNANDA O. DO NASCIMENTO, ÁGATHA KÉLLY A. DA COSTA, DÉBORA CAMILA G. DUARTE, GEORGE ALLAN V. DA SILVA, MATILDE DEL CARMEN C. MEJÍA, KARINA P. PESSOA, LUCIANA MARA F. GONÇALVES, MARIA JÚLIA P. BRANDÃO, MICHELE S. DE JESUS, MARINEIDE S. DA SILVA, CRISTIANO F. DA COSTA, and FELIPE G. NAVECA
- Subjects
coronavirus ,COVID 19 ,Modeling of 3D structures ,NSP12 ,SARS-CoV-2 ,polymorphism ,Science - Abstract
Abstract The disease coronavirus COVID-19 has been the cause of millions of deaths worldwide. Among the proteins of SARS-CoV-2, non-structural protein 12 (NSP12) plays a key role during COVID infection and is part of the RNA-dependent RNA polymerase complex. The monitoring of NSP12 polymorphisms is extremely important for the design of new antiviral drugs and monitoring of viral evolution. This study analyzed the NSP12 mutations detected in circulating SARS-CoV-2 during the years 2020 to 2022 in the population of the city of Manaus, Amazonas, Brazil. The most frequent mutations found were P323L and G671S. Reports in the literature indicate that these mutations are related to transmissibility efficiency, which may have contributed to the extremely high numbers of cases in this location. In addition, two mutations described here (E796D and R914K) are close and have RMSD that is similar to the mutations M794V and N911K, which have been described in the literature as influential on the performance of the NSP12 enzyme. These data demonstrate the need to monitor the emergence of new mutations in NSP12 in order to better understand their consequences for the treatments currently used and in the design of new drugs.
- Published
- 2024
- Full Text
- View/download PDF
16. Heteroptera research in Latin America and the Caribbean (Insecta, Hemiptera): status and perspectives in the 21st century
- Author
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DIMITRI FORERO, VALENTINA CASTRO-HUERTAS, HERNÁN MORALES-DEVIA, KIM R. BARÃO, FILIPE MICHELS BIANCHI, LUIZ ALEXANDRE CAMPOS, PABLO M. DELLAPÉ, MARÍA CECILIA MELO, and CRISTIANO F. SCHWERTNER
- Subjects
Bibliometrics ,Neotropical region ,databases ,knowledge gaps ,historical trends ,community networks ,Science - Abstract
Abstract Latin American and the Caribbean regions (LAC) harbor one of the most biodiverse areas of the world, the Neotropics. True bugs (Hemiptera: Heteroptera) are a diverse lineage of insects, with more than 45,000 species, particularly speciose in the Neotropical region. True bugs are fundamental in the dynamics of natural and modified ecosystems, with several species critical to agriculture and public health. We compiled Heteroptera research in LAC from 1998–2022 using bibliographic databases. Productivity, collaborative networks, and the main topics studied were analyzed. A total of 1,651 Heteroptera studies from LAC were found, with continuous growth being 2021 the most prolific. Four categories (Taxonomy of extant species, Faunistic inventories and new records, Pest species biology, and Community ecology) represent most of the published research. About 60 percent of the records evaluated correspond to five families (Pentatomidae, Reduviidae, Coreidae, Miridae, and Rhyparochromidae). We emphasize the need to keep working on Heteroptera taxonomy because it will allow further advances in other areas such as phylogenetic analyses, biogeography, ecology, and natural history, among others. The results of our analyses characterize the current state of heteropterology in the region, establishing a baseline for future studies and efforts to broaden the knowledge of the group.
- Published
- 2024
- Full Text
- View/download PDF
17. Multifold enhancement in magnetization of atomically thin Cobalt Telluride
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Demiss, Solomon, Tromer, Raphael, Siddique, Saif, Woellner, Cristiano F., Femi, Olu Emmanuel, Palit, Mithun, Roy, Ajit K., Pandey, Prafull, Galvao, Douglas S., Kumbhakar, Partha, and Tiwary, Chandra Sekhar
- Subjects
Physics - Applied Physics ,Condensed Matter - Materials Science - Abstract
Magnetism in semiconductor two-dimensional (2D) materials is gaining popularity due to its potential application in memory devices, sensors, spintronic and biomedical applications. Here, 2D Cobalt Telluride (CoTe) has been synthesized from its bulk crystals using a simple and scalable liquid-phase exfoliation method. The atomically thin CoTe shows over four hundred times enhancement in its magnetic saturation values compared to the bulk form. The UV-Vis absorption spectra reveal superior absorption in the high energy region, suggesting a semiconducting nature. Furthermore, we explain bandgap and origin of high magnetic behavior by density functional theory (DFT) calculations. The 2D CoTe shows a larger magnetism compared to bulk CoTe due to the reduced coordination number of the surface atoms, shape anisotropy and surface charge effect.
- Published
- 2021
18. Alternative approach to the DART mission by the use of gravity assist maneuvers with the Moon and solar sails
- Author
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Ribeiro, Rebeca S., Meireles, Lucas G., Prado, Antônio F. B. A., and de Melo, Cristiano F.
- Published
- 2023
- Full Text
- View/download PDF
19. High-flow nasal therapy: a game-changer in anesthesia and perioperative medicine?
- Author
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Desire T. Maioli, Cristiano F. Andrade, Clovis T. Bevilacqua Filho, and André P. Schmidt
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Anesthesiology ,RD78.3-87.3 - Published
- 2024
- Full Text
- View/download PDF
20. Ressonância Magnética Cardíaca para Avaliar a Eliminação Completa do Substrato após a Ablação Endocárdica da Taquicardia Ventricular na Doença de Chagas
- Author
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Mauricio I. Scanavacca, Rodrigo M. Kulchetscki, Carlos E. Rochitte, and Cristiano F. Pisani
- Subjects
Doença de Chagas ,Taquicardia Ventricular ,Espectroscopia de Ressonância Magnética ,Técnicas de Ablação/métodos ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Published
- 2024
- Full Text
- View/download PDF
21. Mechanical Properties of 3D-Printed Pentadiamond
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Felix, Levi C., Ambekar, Rushikesh S., Woellner, Cristiano F., Kushwaha, Brijesh, Pal, Varinder, Galvao, Douglas S., and Tiwary, Chandra S.
- Subjects
Physics - Applied Physics ,Condensed Matter - Materials Science - Abstract
In this work, We combined fully atomistic molecular dynamics and finite elements simulations with mechanical testings to investigate the mechanical behavior of atomic and 3D-printed models of pentadiamond. Pentadiamond is a recently proposed new carbon allotrope, which is composed of a covalent network of pentagonal rings. Our results showed that the stress-strain behavior is almost scale-independent. The stress-strain curves of the 3D-printed structures exhibit three characteristic regions. For low-strain values, this first region presents a non-linear behavior close to zero, followed by a well-defined linear behavior. The second regime is a quasi-plastic one and the third one is densification followed by structural failures (fracture). The Young's modulus values decrease with the number of pores. The deformation mechanism is bending-dominated and different from the layer-by-layer deformation mechanism observed for other 3D-printed structures. They exhibit good energy absorption capabilities, with some structures even outperforming kevlar. Interestingly, considering the Ashby chart, 3D-printed pentadiamond lies almost on the ideal stretch and bending-dominated lines, making them promising materials for energy absorption applications.
- Published
- 2021
- Full Text
- View/download PDF
22. Mechanical Response of Pentadiamond: A DFT and Molecular Dynamics Study
- Author
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Felix, Levi C., Tromer, Raphael M., Woellner, Cristiano F., Tiwary, Chandra S., and Galvao, Douglas S.
- Subjects
Condensed Matter - Materials Science - Abstract
Pentadiamond is a recently proposed new carbon allotrope consisting of a network of pentagonal rings where both sp$^2$ and sp$^3$ hybridization are present. In this work we investigated the mechanical and electronic properties, as well as, the thermal stability of pentadiamond using DFT and fully atomistic reactive molecular dynamics (MD) simulations. We also investigated its properties beyond the elastic regime for three different deformation modes: compression, tensile and shear. The behavior of pentadiamond under compressive deformation showed strong fluctuations in the atomic positions which are responsible for the strain softening at strains beyond the linear regime, which characterizes the plastic flow. As we increase temperature, as expected, Young's modulus values decrease, but this variation (up to 300 K) is smaller than 10\% (from 347.5 to 313.6 GPa), but the fracture strain is very sensitive, varying from $\sim$44\% at 1K to $\sim$5\% at 300K.
- Published
- 2021
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- View/download PDF
23. Stress concentration targeted reinforcement using multi-material based 3D printing
- Author
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Singh, Himanshu, Santos, Aelton B, Das, Diptava, Ambekar, Rushikesh S., Saxena, Prateek, Woellner, Cristiano F., Katiyar, Nirmal Kumar, and Tiwary, Chandra Sekhar
- Published
- 2024
- Full Text
- View/download PDF
24. Hydrogen atom/molecule adsorption on 2D metallic porphyrin: A first-principles study
- Author
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Tromer, Raphael M., Felix, Isaac M., Felix, Levi C., Machado, Leonardo D., Woellner, Cristiano F., and Galvao, Douglas S.
- Published
- 2024
- Full Text
- View/download PDF
25. Alternative approach to the DART mission by the use of gravity assist maneuvers with the Moon and solar sails
- Author
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Rebeca S. Ribeiro, Lucas G. Meireles, Antônio F. B. A. Prado, and Cristiano F. de Melo
- Subjects
Medicine ,Science - Abstract
Abstract The formation of our Solar System and planetary defense strategies are among the priorities to be investigated in the next years by the space science community. As in-situ missions to small bodies (as comets and asteroids) are options to conduct these investigations, this paper proposes a combination of methodologies to produce low-cost transfers to near-earth asteroids (NEAs). Low-cost trajectories derived from retrograde periodic orbits around $${L}_{1}$$ L 1 are taken as a starting point for the escape of the Earth-Moon system and, as the vehicle exits the sphere of influence of Earth, the deployment of an adjustable solar sail guarantees the interception of the target in a predetermined position and time of flight. Different sail loadings (164, 61 and 30 g/m2) are tested and a case study to the NEA 65,803 Didymos is presented. The results show economies in the velocity increments required by the mission up to 8.48%, although a longer time of flight might be needed depending on the sail loading.
- Published
- 2023
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- View/download PDF
26. A DFT Investigation of the Electronic and Optical Properties of Pentadiamond
- Author
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Tromer, Raphael M., Felix, Levy C., Woellner, Cristiano F., and Galvao, Douglas S.
- Subjects
Condensed Matter - Materials Science - Abstract
Recently, a new carbon 3D carbon allotrope named pentadiamond was proposed. Pentadiamond is composed of carbon atoms in mixed sp$^2$ and sp$^3$-like hybridization. In this work, we have carried out a detailed investigation of the electronic and optical properties of pentadiamond structure using first-principles (DFT) methods. Our results show that pentadiamond has an indirect bandgap semiconductor of $2.50$ eV with GGA-PBE and $3.31$ eV with HSE06. Its static dielectric constant is $4.70$ and the static refractive index is $2.16$. Pentadiamond presents low reflectivity, almost 40$\%$, for all-optical spectrum, making it a good structure to be used as a UV collector. Also, pentadiamond exhibits optical activity in the UV range where other carbon allotropes, such as diamond and 8-tetra(2,2) tubulane show no activity.
- Published
- 2020
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- View/download PDF
27. Thiophene-Tetrathia-Annulene monolayer (TTA-2D): A new 2D semiconductor material with indirect bandgap
- Author
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Tromer, Raphael M., Machado, Leonardo D., Woellner, Cristiano F., and Galvao, Douglas S.
- Subjects
Condensed Matter - Materials Science - Abstract
We propose a new 2D semiconductor material (TTA-2D) based on the molecular structure of Thiophene-Tetrathia-Annulene (TTA). The TTA-2D structural, electronic, and optical properties were investigated using \textit{ab initio} methods. Our results show that TTA-2D is a small indirect bandgap semiconductor ($0.6$ eV). A semiconductor-metal transition can be induced by applying a uniaxial strain. Our results also show that TTA-2D is thermally stable up to $T=1000$ K. TTA-2D absorbs in a large spectral range, from infrared to ultraviolet regions. Values of refractive index and reflectivity show that TTA-2D reflects only $10\%$ of the incident light in the visible region. These results suggest that TTA-2D is a promising material for solar cell applications., Comment: 28 pages, 9 figures
- Published
- 2020
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- View/download PDF
28. Mechanical Properties of Diamond Schwarzites: From Molecular Dynamics Simulations to 3D Printing
- Author
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Felix, Levi C., Gaál, Vladimir, Woellner, Cristiano F., Rodrigues, Varlei, and Galvao, Douglas S.
- Subjects
Physics - Applied Physics - Abstract
Schwarzites are porous crystalline structures with Gaussian negative curvature. In this work, we investigated the mechanical behavior and energy absorption properties of two carbon-based diamond schwarzites (D688 and D8bal). We carried out fully atomistic molecular dynamics (MD) simulations. The optimized MD atomic models were used to generate macro-scale models for 3D-printing (PolyLactic Acid (PLA) polymer filaments) through Fused Deposition Modelling (FDM). Mechanical properties under uniaxial compression were investigated for both the atomic models and the 3D-printed ones. Mechanical testings were performed on the 3D-printed schwarzites where the deformation mechanisms were found to be similar to those observed in MD simulations. These results are suggestive of a scale-independent mechanical behavior that is dominated by structural topology. The structures exhibit high specific energy absorption and crush force efficiency ~0.8, which suggest that the 3D-printed diamond schwarzites are good candidates as energy-absorbing materials.
- Published
- 2020
29. On the Structural Stability and Optical Properties of Germanium-based Schwarzites: A Density Functional Theory Investigation
- Author
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Tromer, Raphael M., Felix, Levi C., Woellner, Cristiano F., and Galvao, Douglas S.
- Subjects
Condensed Matter - Materials Science - Abstract
Since graphene was synthesized the interest for building new 2D and 3D structures based on the carbon allotropes has been growing every day. One of these 3D structures is know as carbon schwarzites. Schwarzites consist of carbon nanostructures possessing the shape of Triply-Periodic Minimal Surfaces (TPMS), which is characterized by a negative Gaussian curvature introduced by the presence of carbon rings with more than six atoms. Some examples of schwarzite families include: primitive (P), gyroid (G) and diamond (D). Previous studies considering different element species of schwarzites have investigated the mechanical, electrical and thermal properties. In this work, we investigated the stability of germanium (Ge) schwarzites using density functional theory with GGA exchange-correlation functional. We chose one structure of each family (P8bal), (G688) and (D688). It was observed that regions usually flat in carbon schwarzites acquires buckled configurations as previously observed on silicene and germanene monolayers. The investigated structures presented a semiconducting bandgap ranging from $0.13$ to $0.27$ eV. We also performed calculations of optical properties within the linear regime, where it was shown that Ge schwarzites structures absorb light from infrared to ultra-violet frequencies. Therefore, our results open new perspectives of materials that can be used in optelectronics devices application., Comment: 23 pages, 6 figures
- Published
- 2020
- Full Text
- View/download PDF
30. Carbon Schwarzites Behavior Under Ballistic Impacts
- Author
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Felix, Levi C., Woellner, Cristiano F., and Galvao, Douglas S.
- Subjects
Condensed Matter - Materials Science - Abstract
Schwarzites are 3D crystalline porous materials exhibiting the shape of Triply Periodic Minimal Surfaces (TPMS). They possess negative Gaussian curvature, created by the presence of rings with more than six sp2-hybridized carbon atoms. Recently, new routes to their synthesis have been proposed. Due to its foam-like structure, schwarzites are interesting for mechanical energy absorption applications. In this work, we investigate through fully atomistic reactive molecular dynamics the mechanical response under ballistic impacts of four structures from primitive (P) and gyroid (G) families (two structures within each family). The two structures in the same family differ mainly by the ratio of hexagons to octagons, where this ratio increases the 'flatness' of the structures. Although the penetration depth values are higher in the 'flatter' structures (P8bal and G8bal), the absorbed kinetic energy by them is considerably higher, which yields them a better energy-absorption performance.
- Published
- 2020
31. Mechanical Properties of a Diamond Schwarzite: From Atomistic Models to 3D-Printed Structures
- Author
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Felix, Levi C., Gaal, Vladimir, Woellner, Cristiano F., Rodrigues, Varlei, and Galvao, Douglas S.
- Subjects
Physics - Applied Physics ,Condensed Matter - Materials Science - Abstract
Triply Periodic Minimal Surfaces (TPMS) possess locally minimized surface area under the constraint of periodic boundary conditions. Different families of surfaces were obtained with different topologies satisfying such conditions. Examples of such families include Primitive (P), Gyroid (G) and Diamond (D) surfaces. From a purely mathematical subject, TPMS have been recently found in materials science as optimal geometries for structural applications. Proposed by Mackay and Terrones in 1991, schwarzites are 3D crystalline porous carbon nanocrystals exhibiting the shape of TPMS. Although their complex topology poses serious limitations on their synthesis with conventional nanoscale fabrication methods, such as Chemical Vapour Deposition (CVD), TPMS can be fabricated by Additive Manufacturing (AM) techniques, such as 3D Printing. In this work, we used an optimized atomic model of a schwarzite structure from the D family (D8bal) to generate a surface mesh that was subsequently used for 3D-printing through Fused Deposition Modelling (FDM). This D schwarzite was 3D-printed with thermoplastic PolyLactic Acid (PLA) polymer filaments. Mechanical properties under uniaxial compression were investigated for both the atomic model and the 3D-printed one. Fully atomistic Molecular Dynamics (MD) simulations were also carried out to investigate the uniaxial compression behavior of the D8bal atomic model. Mechanical testings were performed on the 3D-printed schwarzite where the deformation mechanisms were found to be similar to those observed in MD simulations. These results are suggestive of a scale-independent mechanical behavior that is dominated by structural topology.
- Published
- 2020
32. Mechanical energy absorption of architecturally interlocked petal-schwarzites
- Author
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Leonardo V. Bastos, Rushikesh S. Ambekar, Chandra S. Tiwary, Douglas S. Galvao, and Cristiano F. Woellner
- Subjects
Molecular dynamics ,Stress-strain ,Energy absorption ,Schwarzite ,Interlocked structure ,Chemistry ,QD1-999 - Abstract
We carried out fully atomistic reactive molecular dynamics simulations to study the mechanical behavior of six newly proposed hybrid schwarzite-based structures (interlocked petal-schwarzites). Schwarzites are carbon crystalline nanostructures with negative Gaussian curvature created by mapping a TPMS (Triply Periodic Minimal Surface) with carbon rings containing six to eight atoms. Our simulations have shown that petal-schwarzite structures can withstand uni-axial compressive stress up to the order of GPa and can be compressed past 50 percent strain without structural collapse. Our most resistant hierarchical structure has a calculated compressive strength of 260 GPa and specific energy absorption (SEA) of 45.95 MJ/kg, while possessing a mass density of only 685 kg/m3. These results show that these structures could be excellent lightweight materials for applications that require mechanical energy absorption.
- Published
- 2023
- Full Text
- View/download PDF
33. Exploring the relationship between interfacial adhesion, molecular dynamics, and the brill transition in fully bio-based polyamide 1010 nanocomposites reinforced by two-dimensional materials
- Author
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Pinto, Gabriel M., Santos, Aelton B., Helal, Emna, Ribeiro, Hélio, David, Eric, Woellner, Cristiano F., Demarquette, Nicole R., and Fechine, Guilhermino J.M.
- Published
- 2023
- Full Text
- View/download PDF
34. Feasibility of Transatrial Access for Epicardial Ablation: Evaluation of 2 Different Techniques in Swine
- Author
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Chokr, Muhieddine O., Pinto Vandoni, Pedro Mario, de Carvalho Neto, Jose Nilo, de Moura, Lucas G., dos Santos Sousa, Italo Bruno, Aiello, Vera D., de Brito, Fabio Sandoli, Jr., Pisani, Cristiano F., Hardy, Carina A., de Melo, Sissy L., Darrieux, Francisco C.C., Hachul, Denise T., and Scanavacca, Mauricio I.
- Published
- 2023
- Full Text
- View/download PDF
35. Mechanical and Energy-absorption Properties of Schwarzites
- Author
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Felix, Levi C., Woellner, Cristiano F., and Galvao, Douglas S.
- Subjects
Condensed Matter - Materials Science - Abstract
We investigated through fully atomistic molecular dynamics simulations, the mechanical behavior (compressive and tensile) and energy absorption properties of two families (primitive (P688 and P8bal) and gyroid (G688 and G8bal)) of carbon-based schwarzites. Our results show that all schwarzites can be compressed (with almost total elastic recovery) without fracture to more than 50%, one of them can be even remarkably compressed up to 80%. One of the structures (G8bal) presents negative Poisson's ratio value (auxetic behavior). The crush force efficiency, the stroke efficiency and the specific energy absorption (SEA) values show that schwarzites can be effective energy absorber materials. Although the same level of deformation without fracture observed in the compressive case is not observed for the tensile case, it is still very high (30-40%). The fracture dynamics show extensive structural reconstructions with the formation of linear atomic chains (LACs).
- Published
- 2019
36. Utilization of two-dimensional multicomponent Quasicrystal for NO2 gas detection
- Author
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Mishra, S.S., Kumar, Sumit, Kumbhakar, Partha, Katiyar, Nirmal Kumar, Tromer, Raphael, Woellner, Cristiano F., Galvao, Douglas S., Tiwary, Chandra S., Kumar, Mahesh, and Biswas, Krishanu
- Published
- 2023
- Full Text
- View/download PDF
37. Mechanical Properties of Protomene: A Molecular Dynamics Investigation
- Author
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Oliveira, Eliezer F., Autreto, Pedro A. S., Woellner, Cristiano F., and Galvao, Douglas S.
- Subjects
Condensed Matter - Materials Science ,Condensed Matter - Mesoscale and Nanoscale Physics ,Physics - Computational Physics - Abstract
Recently, a new class of carbon allotrope called protomene was proposed. This new structure is composed of sp2 and sp3 carbon-bonds. Topologically, protomene can be considered as an sp3 carbon structure (~80% of this bond type) doped by sp2 carbons. First-principles simulations have shown that protomene presents an electronic bandgap of ~3.4 eV. However, up to now, its mechanical properties have not been investigated. In this work, we have investigated protomene mechanical behavior under tensile strain through fully atomistic reactive molecular dynamics simulations using the ReaxFF force field, as available in the LAMMPS code. At room temperature, our results show that the protomene is very stable and the obtained ultimate strength and ultimate stress indicates an anisotropic behavior. The highest ultimate strength was obtained for the x-direction, with a value of ~110 GPa. As for the ultimate strain, the highest one was for the z-direction (~25% of strain) before protomene mechanical fracture.
- Published
- 2018
- Full Text
- View/download PDF
38. Prediction of the evolution of defects induced by the heated implantation process: Contribution of kinetic Monte Carlo in a multi-scale modeling framework
- Author
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Julliard, P.L., Johnsson, A., Zographos, N., Demoulin, R., Monflier, R., Jay, A., Er-Riyahi, O., Monsieur, F., Joblot, S., Deprat, F., Rideau, D., Pichler, P., Hémeryck, A., and Cristiano, F.
- Published
- 2023
- Full Text
- View/download PDF
39. O Ecocardiograma Intracardíaco Deve Ser Utilizado em Todo Paciente Submetido a Ablação de FA?
- Author
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Cristiano F. Pisani and Mauricio Scanavacca
- Subjects
Arritmias Cardíaca ,Fibrilação Atrial ,Ecocardiografia/métodos ,Ecocardiografia/tendências ,Ablação por Cateter ,Ecocardiografia Transesofagiana/métodos ,Técnicas de Ablação/tendências ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Published
- 2023
- Full Text
- View/download PDF
40. Insecticides Efficacy to Control the Neotropical Peanut Burrower Bug Cyrtomenus mirabilis (Perty, 1830) (Hemiptera: Cydnidae) Under Laboratory Conditions
- Author
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Marcos D. Michelotto, Aline D. P. Reis, Renato M. Rodrigues, Rodolfo O. Rincão, Daniel J. Andrade, Cristiano F. Schwertner, and Ignácio J. Godoy
- Subjects
Arachis hypogaea L. ,soil pest ,seed treatment ,chemical control ,Zoology ,QL1-991 - Abstract
In this study, we evaluated the effectiveness of insecticides sprayed by contact as well as seeds treatment for controlling the burrower bug Cyrtomenus mirabilis (Perti, 1830) (Hemiptera: Cydnidae) under laboratory conditions. In the first experiment, the insecticides were sprayed onto the insects (direct contact). Insect mortality evaluation started 24h after insecticide application and repeated every two days up to 20 days. In the second experiment, peanut seeds were treated with insecticides. The mortality of insects was evaluated at 10, 15, and 20 days after installation. The mixture of fipronil and alpha-cypermethrin in direct contact was the most efficient treatment to control nymphs and adults of C. mirabilis. Regarding the seed treatment, fipronil was the most efficient for controlling adults of C. mirabilis while for nymphs, all insecticides were highly effective.
- Published
- 2023
- Full Text
- View/download PDF
41. On the mechanical properties of novamene: a fully atomistic molecular dynamics and DFT investigation
- Author
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Oliveira, Eliezer F., Autreto, Pedro A. S., Woellner, Cristiano F., and Galvao, Douglas S.
- Subjects
Condensed Matter - Materials Science - Abstract
We have investigated through fully atomistic reactive molecular dynamics and DFT simulations, the mechanical properties and fracture dynamics of novamene, a new 3D carbon allotrope structure recently proposed. Our results showed that novamene is an anisotropic structure with relation to tensile deformation. Although novamente shares some mechanical features with other carbon allotropes, it also exhibits distinct ones, such as, extensive structural reconstructions (self-healing effect). Novamene presents ultimate strength (~ 100 GPa) values lower than other carbon allotropes, but it has the highest ultimate strain along the z-direction (~ 22.5%). Although the Young's modulus (~ 600 GPa) and ultimate strength values are smaller than for other carbon allotropes, they still outperform other materials, such as for example silicon, steel or titanium alloys. With relation to the fracture dynamics, novamene is again anisotropic with the fracture/crack propagation originating from deformed heptagons and pentagons for x and y directions and broken sp3 bonds connecting structural planes. Another interesting feature is the formation of multiple and long carbon linear chains in the final fracture stages.
- Published
- 2018
42. Structural and Thermal Stability of Graphyne and Graphdiyne Nanoscroll Structures
- Author
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Solis, Daniel, Borges, Daiane D., Woellner, Cristiano F., and Galvao, Douglas S.
- Subjects
Condensed Matter - Mesoscale and Nanoscale Physics ,Condensed Matter - Materials Science - Abstract
Graphynes and graphdiynes are generic names for families of two-dimensional carbon allotropes, where acetylenic groups connect benzenoid-like hexagonal rings, with the co-existence of sp and sp2 hybridized carbon atoms. The main differences between graphynes and graphdiynes are the number of acetylenic groups (one and two for graphynes and graphdiynes, respectively). Similarly to graphene nanoscrolls, graphyne and graphdiynes nanoscrolls are nanosized membranes rolled up into papyrus-like structures. In this work we investigated through fully atomistic reactive molecular dynamics simulations the structural and thermal (up to 1000K) stability of alpha,beta,gamma-graphyne and alpha,beta,gamma-graphdiyne scrolls. Our results show that stable nanoscrolls can be formed for all the structures investigated here, although they are less stable than corresponding graphene scrolls. This can be explained as a consequence of the higher graphyne/graphdiyne structural porosity in relation to graphene, which results in decreased {\pi}-{\pi} stacking interactions.
- Published
- 2018
43. Mechanical Properties of Ultralow Density Graphene Oxide/Polydimethylsiloxane Foams
- Author
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Woellner, Cristiano F., Owuor, Peter S., Li, Tong, Vinod, Soumya, Ozden, Sehmus, Kosolwattana, Suppanat, Bhowmick, Sanjit, Duy, Luong X., Salvatierra, Rodrigo V., Wei, Bingqing, Asif, Syed A. S., Tour, James M., Vajtai, Robert, Lou, Jun, Galvao, Douglas S., Tiwary, Chandra S., and Ajayan, Pulickel. M.
- Subjects
Physics - Applied Physics ,Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
Low-density, highly porous graphene/graphene oxide (GO) based-foams have shown high performance in energy absorption applications, even under high compressive deformations. In general, foams are very effective as energy dissipative materials and have been widely used in many areas such as automotive, aerospace and biomedical industries. In the case of graphene-based foams, the good mechanical properties are mainly attributed to the intrinsic graphene and/or GO electronic and mechanical properties. Despite the attractive physical properties of graphene/GO based-foams, their structural and thermal stabilities are still a problem for some applications. For instance, they are easily degraded when placed in flowing solutions, either by the collapsing of their layers or just by structural disintegration into small pieces. Recently, a new and scalable synthetic approach to produce low-density 3D macroscopic GO structure interconnected with polydimethylsiloxane (PDMS) polymeric chains (pGO) was proposed. A controlled amount of PDMS is infused into the freeze-dried foam resulting into a very rigid structure with improved mechanical properties, such as tensile plasticity and toughness. The PDMS wets the graphene oxide sheets and acts like a glue bonding PDMS and GO sheets. In order to obtain further insights on mechanisms behind the enhanced mechanical pGO response we carried out fully atomistic molecular dynamics (MD) simulations. Based on MD results, we build up a structural model that can explain the experimentally observed mechanical behavior.
- Published
- 2018
44. Mechanical Properties of Schwarzites - A Fully Atomistic Reactive Molecular Dynamics Investigation
- Author
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Woellner, Cristiano F., Botari, Tiago, Perim, Eric, and Galvao, Douglas S.
- Subjects
Condensed Matter - Mesoscale and Nanoscale Physics ,Physics - Computational Physics - Abstract
Schwarzites are crystalline, 3D porous structures with stable negative curvature formed of sp2-hybridized carbon atoms. These structures present topologies with tunable porous size and shape and unusual mechanical properties. In this work, we have investigated the mechanical behavior under compressive strains and energy absorption of four different Schwarzites, through reactive molecular dynamics simulations, using the ReaxFF force field as available in the LAMMPS code. We considered two Schwarzites families, the so-called Gyroid and Primitive and two structures from each family. Our results also show they exhibit remarkable resilience under mechanical compression. They can be reduced to half of their original size before structural failure (fracture) occurs.
- Published
- 2018
45. Structural Transformations of Carbon and Boron Nitride Nanoscrolls at High Impact Collisions
- Author
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Woellner, Cristiano F., Machado, Leonardo D., Autreto, Pedro A. S., de Sousa, Jose M., and Galvao, Douglas S.
- Subjects
Condensed Matter - Materials Science - Abstract
The behavior of nanostructures under high strain-rate conditions has been object of theoretical and experimental investigations in recent years. For instance, it has been shown that carbon and boron nitride nanotubes can be unzipped into nanoribbons at high velocity impacts. However, the response of many nanostructures to high strain-rate conditions is still not completely understood. In this work we have investigated through fully atomistic reactive (ReaxFF) molecular dynamics (MD) simulations the mechanical behavior of carbon (CNS) and boron nitride nanoscrolls (BNS) colliding against solid targets at high velocities,. CNS (BNS) nanoscrolls are graphene (boron nitride) membranes rolled up into papyrus-like structures. Their open-ended topology leads to unique properties not found in close-ended analogues, such as nanotubes. Our results show that the collision products are mainly determined by impact velocities and by two impact angles, which define the position of the scroll (i) axis and (ii) open edge relative to the target. Our MD results showed that for appropriate velocities and orientations large-scale deformations and nanoscroll fracture can occur. We also observed unscrolling (scrolls going back to quasi-planar membranes), scroll unzipping into nanoribbons, and significant reconstruction due to breaking and/or formation of new chemical bonds. For particular edge orientations and velocities, conversion from open to close-ended topology is also possible, due to the fusion of nanoscroll walls.
- Published
- 2017
- Full Text
- View/download PDF
46. Radioterapia Estereotáxica para Tratamento de Taquicardia Ventricular Recorrente na Doença de Chagas: Relato do Primeiro Caso na América Latina
- Author
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Mauricio I. Scanavacca, Cristiano F. Pisani, Bernardo Salvajoli, Rodrigo M. Kulchetscki, Marina P. Mayrink, João Victor Salvajoli, and Roberto Kalil
- Subjects
Radioterapia ,Taquicardia Ventricular ,Doença de Chagas ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Published
- 2023
- Full Text
- View/download PDF
47. Mechanical properties of 3D printed macroscopic models of schwarzites
- Author
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Vladimir Gaal, Levi C. Felix, Cristiano F. Woellner, Douglas S. Galvao, Chandra Sekhar Tiwary, Marcos Akira d'Ávila, and Varlei Rodrigues
- Subjects
additive manufacturing ,mechanical properties ,molecular dynamics ,Schwarzite ,triply periodic minimal surfaces ,Materials of engineering and construction. Mechanics of materials ,TA401-492 - Abstract
Abstract Additive manufacturing allows to produce parts with complex geometries is an essential tool in materials science. Schwarzites is a class of carbon allotropes with interesting mechanical properties. However, most of the schwarzite studies are theoretical until now because the synthesis of large schwarzite fragments remains elusive. In this work, we have carried out molecular dynamics simulations, and extensive experimental tests of 3D printed schwarzites to study their mechanical behavior. Our results show that this behavior does not strongly depend on printed used material, model size, or the number of structural unit cells. We also observed a strong correlation between the stress‐strain curves of 3D printed and the ones obtained from fully atomistic molecular dynamics simulations. Both results show the same trends for almost all investigated schwarzites, suggesting that topological features and scale‐size invariant dominate some deformation mechanisms. Our results further validate the use of atomic models of materials with complex geometries that are impractical or very difficult to synthesize, translated into macro models that can be 3D printed, and offer an innovative engineered approach to produce new materials with tunable mechanical behavior.
- Published
- 2022
- Full Text
- View/download PDF
48. Hemiptera Sampling Methods
- Author
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Schwertner, Cristiano F., Carrenho, Renan, Moreira, Felipe F. F., Cassis, Gerasimos, Santos, Jean Carlos, editor, and Fernandes, Geraldo Wilson, editor
- Published
- 2021
- Full Text
- View/download PDF
49. Mechanical response of pentadiamond: A DFT and molecular dynamics study
- Author
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Felix, Levi C., Tromer, Raphael M., Woellner, Cristiano F., Tiwary, Chandra S., and Galvao, Douglas S.
- Published
- 2022
- Full Text
- View/download PDF
50. Insights on the mechanism of water-alcohol separation in multilayer graphene oxide membranes: entropic versus enthalpic factors
- Author
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Borges, Daiane Damasceno, Woellner, Cristiano F., Autreto, Pedro A. S., and Galvao, Douglas S.
- Subjects
Condensed Matter - Mesoscale and Nanoscale Physics ,Condensed Matter - Soft Condensed Matter - Abstract
Experimental evidences have shown that graphene oxide (GO) can be impermeable to liquids, vapors and gases, while it allows a fast permeation of water molecules. The understanding of filtration mechanisms came mostly from studies dedicated to water desalination, while very few works have been dedicated to distilling alcohols. In this work, we have investigated the molecular level mechanism underlying the alcohol/water separation inside GO membranes. A series of molecular dynamics and Grand-Canonical Monte Carlo simulations were carried out to probe the ethanol/water and methanol/water separation through GO membranes composed of multiple layered graphene-based sheets with different interlayer distance values and number of oxygen-containing functional groups. Our results show that the size exclusion and membrane affinities are not sufficient to explain the selectivity. Besides that, the favorable water molecular arrangement inside GO 2D-channels forming a robust H-bond network and the fast water diffusion are crucial for an effective separation mechanism. In other words, the separation phenomenon is not only governed by affinities with the membrane (enthalpic mechanisms) but mainly by the geometry and size factors (entropic mechanisms). We verified that the 2D geometry channel with optimal interlayer distance are key factors for designing more efficient alcohol-water separation membranes. Our findings are consistent with the available experimental data and contribute to clarify important aspects of the separation behavior of confined alcohol/water in GO membranes.
- Published
- 2017
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