Search

Your search keyword '"da Silva, Rodrigo José"' showing total 17 results
Start Over Author "da Silva, Rodrigo José"
17 results on '"da Silva, Rodrigo José"'

10. Parasitic infections, hematological and biochemical parameters suggest appropriate health status of wild coati populations in anthropic Atlantic Forest remnants

Author

Bernal-Valle, Sofía, Teixeira, Miriam Nogueira, de Araújo Neto, Antônio Rodrigues, Gonçalves-Souza, Thiago, Feitoza, Bárbara Feliciano, dos Santos, Sybelle Montenegro, da Silva, Andreza Jocely, da Silva, Rodrigo José, de Oliveira, Maria Adélia Borstelmann, and de Oliveira, Jaqueline Bianque

Published
2022
Full Text
View/download PDF

14. Demonstrações matemáticas como fator de aprimoramento para o ensino de astronomia

Author

Da Silva, Rodrigo José and Gonzaga, Edson Pereira

Subjects
demonstrações matemáticas, interdisciplinaridade, ensino de astronomia
Abstract

Disponível em A Física na Escola, v. 19, n. 2, 2021. RESUMO: Partindo-se da intrínseca interdisciplinaridade presente na astronomia e assumindo o relevante papel das demonstrações matemáticas no processo de construção mental, o presente artigo tem por objetivo a proposição de duas demonstrações matemáticas, de própria autoria, a serem utilizadas como ferramentas de ensino, as quais possuem como base a interdisciplinaridade e a meta de maior assimilação e concretização, por parte do alunado, de conceitos abstratos. A primeira demonstração recai sobre o cálculo da distância entre observador e horizonte, em função da altura à qual o observador encontra-se posicionado em relação à superfície terrestre. A segunda demonstração é uma adaptação matemática para a efetiva explicação da ocorrência de maiores temperaturas quando os raios solares incidem a pino (perpendicularmente) em determinada região do planeta., R.J. Silva, E.P. Gonzaga, "Demonstrações matemáticas como fator de aprimoramento para o ensino de astronomia," A Física na Escola (Online), ISSN 1983-6430, vol. 19, n. 2, pp. 85-89, 2021. Disponível em: www1.fisica.org.br/fne/edicoes/category/55-volume-19-n-2-outubro

Published
2021
Full Text
View/download PDF

16. Statistical evaluation of three-point bending properties of sustainable aluminium sandwich panels with arched-core geometry

Author

Lopes, Rogério Teixeira, da Silva, Rodrigo José, Santos Freire, Rodrigo Teixeira, dos Santos, Júlio Cesar, Christoforo, André Luis, Panzera, Tulio Hallak, and Scarpa, Fabrizio

Abstract

This study presents the first assessment of sustainable aluminium sandwich panels with an arched-core geometry. The arches are constructed from recycled aluminium obtained from drink container cans and bonded to aluminium skins using a polymer system. Through statistical analysis, the research aims to investigate the influence of the adhesive system (castor-oil or epoxy), adhesive layer thickness (0.8 mm or 1.5 mm), and core arch configuration (aligned or alternated pattern) on the mechanical performance of the sandwich panels, evaluated through a three-point bending test. The Al-arched-core panels, with a support span of 150 mm and a width of 75 mm, achieve a maximum load of 500 N, equivalent to 51 kg per 150 × 75 mm2. Additionally, the panels exhibit a core shear modulus of up to 10 MPa, while the flexural modulus under pure bending is estimated to be approximately 7 GPa. The mechanical performance of the panels is further enhanced by utilising thicker adhesive layers. Employing alternated arches in the core improves the distribution of flexural stress along the panel. These Al-arched-core panels demonstrate suitable mechanical performance for secondary structural applications, offering a cost-effective and environmentally friendly fabrication process.

Published
2024
Full Text
View/download PDF

17. Efeito da substância húmica na germinação de sementes de Myracrodruon urundeuva Fr. All.

Author

da Mota, Alexandre Ribeiro, da Silva, Rodrigo José, de Souza, Priscila Bezerra, de Oliveira, Lucicléia Mendes, and dos Santos, Antônio Carlos Martins

Abstract

Humic substances are originated from the oxidation and polymerization of the organic matter, with high molecular weights and diverse functional groups. Depending of the solubility aqueous environment humic substances are divided in humic acid, fulvic acid and humin. There are few researches related to the humic substances effects on seeds germination, and were not found researches using species Myracrodruon urundeuva Fr. A11. Humic substances compositions are varied that makes it hard to understand its effects. The work intended to analyse the effects of different concentrations of humic substances on Myracrodruon urundeuva Fr. All seed germination. The work was developed in the seed laboratory in the Federal University of Tocantins, where the seeds were kept emerged for 12 hours within a solution containing 0.00; 0.25; 0.50; 0.75 and 1.00% of humic substance concentration, were subsequently germinated in B.O.D regulated at 25 °C. These samples have been evaluated by percentage measures, average time and germination speed index. Humic substances application in concentration 0 and 0.25% might provide positive effect on germination and on Myracrodruon urundeuva Fr. All. seeds germination speed index and higher concentrations cause phytotoxic effect. [ABSTRACT FROM AUTHOR]

Published
2015
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results