Zobrazeno 1 - 10
of 44
pro vyhledávání: '"F. Carvalho-Rodrigues"'
Publikováno v:
Optics and Lasers in Engineering. 46:55-61
Modelling high-speed laser lap welding of thermoplastic films has been accomplished and the influence of laser beam spot shape, dimensions, and position relative to sample displacement was analysed. Engineering parameters predicted by the model were
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::38f68193b7c516cb97f6e9f351e76e1b
https://doi.org/10.1016/j.optlaseng.2007.07.001
https://doi.org/10.1016/j.optlaseng.2007.07.001
Publikováno v:
Optics and Lasers in Engineering. 42:27-39
Common thermoplastic films used in the packaging industry have a thickness lower than 100 μm, and present low absorption to CO2 laser radiation. This characteristic renders the use of cutting parameters, predicted by models developed for thicker the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::062d373b3e50c1b2508cfb7cc79a489b
https://doi.org/10.1016/s0143-8166(03)00071-x
https://doi.org/10.1016/s0143-8166(03)00071-x
Publikováno v:
Polymer Testing. 23:307-312
A set of simple methodologies is presented so that optical parameters relevant to 10.6 μm CO2 laser radiation processing of thermoplastics films are obtained. These methodologies are applied to transparent and white polyethylene and transparent poly
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ab1e8c301a9975d433d39f9c3372c54d
https://doi.org/10.1016/j.polymertesting.2003.07.001
https://doi.org/10.1016/j.polymertesting.2003.07.001
Autor:
F Carvalho-Rodrigues
Publikováno v:
Technology in Society. 23:375-381
The universalism and objectivity inherent in the scientific process endow science and scientific communities with a natural potential for international cooperation. To harness this potential and transfer it into a flow of useful results for internati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::26f9181df091a997a9a0760d9a0eaa12
https://doi.org/10.1016/s0160-791x(01)00020-3
https://doi.org/10.1016/s0160-791x(01)00020-3
Autor:
F. Carvalho-Rodrigues, J. Dockery
Publikováno v:
Biosystems. 38:229-234
We take the occasion of the workshop to examine a proposition that systems may be better defined in terms of interactions based on information exchange rather than on atomic elements. Although speculative, the paper is in the spirit of exploration wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f593cc75ffb99e488e75ce153e03851
https://doi.org/10.1016/0303-2647(95)01595-7
https://doi.org/10.1016/0303-2647(95)01595-7
Publikováno v:
Applied optics. 42(31)
Schlieren interferometry is found to be an alternative tool for temperature measurement during thermoplastic laser welding with regard to methods based on thermocouples or optical pyrometers. In fact, these techniques are not easily applied when mate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0016a95afc25ff9721dc662a75367703
https://pubmed.ncbi.nlm.nih.gov/14649275
https://pubmed.ncbi.nlm.nih.gov/14649275
Publikováno v:
Acta Médica Portuguesa, Vol 1, Iss 4 (1979)
The analysis of images obtained in the electron microscope is made mostly through subjective mechanisms, using the observers experience to recognize morphologic patterns which will allow the identification of the structures. The development of techni
Externí odkaz:
https://doaj.org/article/1b9649e696d04c3dac456da50a0eea5b
Publikováno v:
Optical Engineering. 46:064301
The characteristics of thermoplastic films, like low conductivity and high transparency, allow simplifying the prediction of the necessary engineering parameters in CO2 laser lap welding by the application of an energy balance approximation. The ener
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0c232a9c6b875be5219e4786abd323d5
https://doi.org/10.1117/1.2747639
https://doi.org/10.1117/1.2747639
Publikováno v:
Optical Engineering. 42:3365
The low absorption presented by thermoplastic films to 10.6-μm CO 2 laser radiation makes the engineering use of welding parameters, predicted by models developed for thicker thermoplastics, very difficult. A new theoretical model is developed descr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc4633838c22f37116da3150dc43dc2c
https://doi.org/10.1117/1.1615260
https://doi.org/10.1117/1.1615260
Autor:
F. Carvalho Rodrigues
Publikováno v:
Journal of the Operational Research Society. 40:789-793
This paper describes a method for assessing the combat degradation of an army, based on the Shannon entropy measure. It is shown that this measure is useful for analysing combat degradation due to casualties, since it is in broad agreement with the v
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a57886e1ea9a118359557d442dbd8a8
https://doi.org/10.1057/palgrave.jors.0400810
https://doi.org/10.1057/palgrave.jors.0400810