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您的检索式：作者名="Roger Angel"
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| 1 | Stretched membranee with electrostatic curvature (SMEC) mirrors:A new technology for large lightweight space telescopes显示文摘 | Simona Errico Roger Angel Brian Stamper | 2002 | SPIE2002，41，8： | 1 |
| 2 | CLT Fabricated with Gmelina arborea and Tectona grandis Wood from Fast-Growth Forest Plantations: Physical and Mechanical Properties显示文摘Fabrication and use of Cross Laminated Timber(CLT)using tropical woods is still limited at present.Therefore objective of the present study aims to determine the possibility of using CLT panels of 3 and 5 layers,fabricated withTectona grandis and Gmelina arborea wood using adhesive of isocyanate polymer emulsion system catalyzed with polymeric isocyanate.Delamination,water absorption,density,flexure test,compression and glue-line shear were evaluated using ANSI/APA PRG320-2012 ASTM D198 and ASTM D4761 standard.The results showed that CLT panels of T.grandis presented higher values of density,less water absorption and lower delamination,with no evident differences between the CLT of 3 and 5 layers.The high density of T.grandis resulted in higher values of the mechanical properties.The flatwise and edgewise flexure tests in 5-layer CLT panels of both species pre-sented higher values of bending stiffness compared to those of 3-layer CLT panels.Further the bending stress values in 3-layer CLT panels were higher than for 5-layer CLT panels.As for shear stress in bending flatwise,in both species,3-layer CLT surpassed 5-layer CLT panels,but in the edgewise test no differences were observed.The MOE and Fc in the compression test were superior in relation to the edgewise test.MOE and Fc in compres-sion flatwise in 3-layer CLT was greater than in 5-layer CLT in both species,but edgewise these values were higher in 5-layer CLT panels.The most common failures were stress and delamination in the flexure test,whereas in the compression test these were:shearing,splitting and crushing.In the glue-line shear test no differences were observed between CLT panels of 3 and 5 layers for both species. | Freddy Munoz Carolina Tenorio Roger Moya Angel Navarro-Mora | 2022 | Journal of Renewable Materials2022，10，1： | 1 |
| 3 | Wave-front sensing with time-of-flight phase diversity显示文摘 | Michael Lloyd Hart Stuart M Jefferies J Roger P Angel | 2001 | Optics Letter2001，26，7： | 1 |
| 4 | Flat membrane mirrors for space telescopes 显示文摘 | Brian Stamper Roger Angel James Burge | 2000 | Proceedings of SPIE2000，4091，： | 1 |
| 5 | 重量特轻的空间光学部件显示文摘空间天文望远镜和防卫系统都需要重量极轻的大块镜子(反射镜).哈勃太空望远镜的口径是由一块呈蜂窝状结构的玻璃制成的,直径为2.4 m,表面重量密度为250kg/m2.对于口径比它大得多的其它仪器来说,其重量则会更重,所以采用新技术来减轻重量则是最根本的出路.现在需要的是具有快速聚焦比(~f/1.25)的8 m等级的空间镜子,其表面重量密度要非常低,而且衍射依然要受光学波长的限制. | Roger Angel 贡树行 | 2001 | 红外2001，22，6： | 0 |
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