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299 results on '"Viguier, J."'

1. Heat treatment of poplar plywood: modifications in physical, mechanical and durability properties

Author

Marcon B, Viguier J, Candelier K, Thevenon M-F, Butaud J-C, Pignolet L, Gartili A, Denaud L, and Collet R

Subjects
Heat Treatment, Plywood, Poplar, Bending Modulus of Elasticity, Bending Strength, Bond Quality, Forestry, SD1-669.5
Abstract

Plywood made of poplar are limited to indoor usages since poplar exhibits a rather low natural durability. Recently, wood heat treatments have been applied to improve properties such as decay susceptibility and dimensional stability. This study examines the potential of exposing poplar plywood to heat treatment to extend the potential of applications of this engineered wood product to outdoor end uses, and new markets accordingly. Plywood panels were glued with two different adhesive formulations based on the same melamine-urea-formaldehyde (MUF) resin to compare their respective ability to resist to the heat treatment. These different plywoods were thermally modified in saturated steam conditions at 215 °C for 2 hours following the ThermoWood® process, up to reach 14% in mass loss. The durability improvement brought by the heat treatment was assessed in order to evaluate any possible outdoor uses for such plywood. After all the conducted analyses, the potential to use heat treated poplar plywoods in humid interior and protected exterior service conditions was confirmed.

Published
2023
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11. Performance of timber board models for prediction of local bending stiffness and strength-with application on douglas fir sawn timber

Author

Olsson, Anders, Pot, G., Viguier, J., Hu, Min, Oscarsson, Jan, Olsson, Anders, Pot, G., Viguier, J., Hu, Min, and Oscarsson, Jan

Abstract

Efficient utilization of structural timber requires accurate methods for machine strength grad-ing. One of the most accurate methods presented this far is based on data of local fiber orientation on board surfaces, obtained from laser scanning. In this paper, two potential improvements of this method are exam-ined. The first one consists of replacing a model based on simple integration over cross sections of boards for calculation of local bending stiffness by a 3D solid finite element (FE) model from which local bending stiffness is derived. The second improvement concerns replacement of a simple model for the fiber orienta-tion in the interior of board by a more advanced one taking location of pith and growth direction of knots into account. Application of the alternative models on a sample of more than 200 Douglas fir boards, size 40 mm x 100 mm x 3000 mm, cut from large logs, show that each of the evaluated model improvements contributes to improved grading accuracy. When local bending stiffness is calculated utilizing the herein suggested FE model in combination with the improved model of fiber orientation in the interior of boards, a coefficient of determination to bending strength as high as 0.76 is obtained. For comparison, a coefficient of determination of 0.71 is obtain using the simpler original models.

Published
2022
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39. A New Adjuvant Treatment with PolyadenyliC-Polyuridylic Acid in Operable Breast Cancer

Author

Lacour, F., Lacour, J., Spira, A., Michelson, M., Delage, G., Petit, J. Y., Viguier, J., Allfrey, V. G., editor, Allgöwer, M., editor, Berenblum, I., editor, Bergel, F., editor, Bernard, J., editor, Bernhard, W., editor, Blokhin, N. N., editor, Bock, H. E., editor, Braun, W., editor, Bucalossi, P., editor, Chaklin, A. V., editor, Chorazy, M., editor, Cunningham, G. J., editor, Porta, G. Della, editor, Denoix, P., editor, Dulbecco, R., editor, Eagle, H., editor, Eker, R., editor, Good, R. A., editor, Grabar, P., editor, Harris, R. J. C., editor, Hecker, E., editor, Herbeuval, R., editor, Higginson, J., editor, Hueper, W. C., editor, Isliker, H., editor, Kieler, J., editor, Kirsten, W. H., editor, Klein, G., editor, Koprowski, H., editor, Koss, L. G., editor, Macbeth, R. A., editor, Martz, G., editor, Mathé, G., editor, Mühlbock, O., editor, Old, L. J., editor, Potter, V. R., editor, Sabin, A. B., editor, Sachs, L., editor, Saxén, E. A., editor, Schmidt, C. G., editor, Spiegelman, S., editor, Szybalski, W., editor, Tagnon, H., editor, Tissières, A., editor, Uehlinger, E., editor, Wissler, R. W., editor, Rentchnick, P., editor, Senn, H. J., editor, Bonadonna, G., editor, and Salmon, S., editor

Published
1982
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48. Cancer occurrence and cure: the power of the mind

Author

Eisinger, F., primary, Pivot, X., additional, Greillier, L., additional, Touboul, C., additional, Blay, J.-Y., additional, Couraud, S., additional, Lhomel, C., additional, Cortot, A.B., additional, Morère, J.-F., additional, and Viguier, J., additional

Published
2016
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49. Current or former smokers: Who wants to be screened?

Author

Couraud, S., primary, Greillier, L., additional, Pivot, X., additional, Guibaudet, L., additional, Blay, J.-Y., additional, Lhomel, C., additional, Viguier, J., additional, Morère, J.-F., additional, Eisinger, F., additional, and Cortot, A.B., additional

Published
2016
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