Expounding structures of roller compacted concrete dam specimens by means of hard conventional X-ray inspection

Autor: W.C. Godoi, G. Coraiola, S. Ribeiro Junior, V. Swinka-Filho, K. de Geus, K. Franke Portella, B.L. Medeiros, F. Cunha de Andrade, M.G. Hönnicke

Publikováno v: Heliyon, Vol 5, Iss 4, Pp e01467- (2019)

A simple solution to improve the contrast between the different concrete composites in X-ray imaging (radiography and tomography) of a highly compressed composite sample of real size roller compacted concrete (RCC) specimens is presented. This is mad

Externí odkaz: https://doaj.org/article/e50f2e097a03486c910a0b3584937b01

Lead foil in dental X-ray film: Backscattering rejection or image intensifier?

Autor: Marcelo Goncalves Hönnicke, V. Swinka-Filho, W. C. Godoi, G.J. Delben

Publikováno v: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 763:104-111

Dental X-ray films are still largely used due to sterilization issues, simplicity and, mainly, economic reasons. These films almost always are double coated (double emulsion) and have a lead foil in contact with the film for X-ray backscattering reje

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::80e38912fa3c984559916e6a07954338
https://doi.org/10.1016/j.nima.2014.06.015

Physical chemistry research of a concrete dam with over 50 years of operation Investigação físico-química de uma barragem de concreto com mais de 50 anos de operação

Autor: K. F. Portella, A. Joukoski, V. Swinka Filho, M. A. Soares, E. S. Ferreira

Publikováno v: Cerâmica, Vol 58, Iss 347, Pp 374-380 (2012)

Guaricana hydroelectric power plant concrete dam, located in the South of Brazil, was investigated after 49 years of operation. A part of the mortar was altered to ettringite, and other by-products. The inner defects in the fracture and polished samp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doajarticles::6a0c2bb5ba14c279b04b90b4f1ffaf3c
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132012000300015

Determination of crushed stone volume in concrete cores from hydroelectric power plant dams by three-dimensional tomography

Autor: W. C. Godoi, J. C. A. Galvao, P. Martins, R. Mendes, V. Swinka-Filho, A. Joukoski, K. F. Portella, K. De Geus

Publikováno v: Insight - Non-Destructive Testing and Condition Monitoring. 51:654-659

In this paper we present the results of a methodology for obtaining the volume of crushed stones using industrial tomography in concrete cores from hydroelectric power plant dams. In order to apply the appropriate voltage in the X-ray tube during rad

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2ea59c16950358085a82b429fe1e2ef4
https://doi.org/10.1784/insi.2009.51.12.654

Efeito Kelvin com corrente não-senoidal

Autor: Sérgio Luiz Meister Berleze, V. Swinka Filho, Renê Robert

Publikováno v: Revista Brasileira de Ensino de Física, Vol 27, Iss 4, Pp 583-586
Revista Brasileira de Ensino de Física v.27 n.4 2005
Revista Brasileira de Ensino de Física
Sociedade Brasileira de Física (SBF)
instacron:SBF

O objetivo deste trabalho é mostrar como o uso de um software adequado permite resolver o problema do efeito Kelvin de maneira simples em condutores cilíndricos. Calculamos a forma de onda da corrente elétrica para tensões aplicadas não senoidai

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c6e376ceaa11311dfc364e62dca75ee
https://doi.org/10.1590/s1806-11172005000400011