The design of the flexure mount recently submitted to NASA Ames for the structural support of the primary mirror of the Space Infrared Telescope Facility (SIRTF) is presented. The flexure system must passively accommodate the differential thermal contraction between the glass mirror and the aluminum structure of the telescope during cryogenic cooldown. Further, it must support the one meter diameter, 116 kilogram (258 pound) primary mirror during a severe launch to orbit. Procedures used to establish the required radial compliance using computer programs NASTRAN and FRINGE are discussed. The parametric design program developed to study early concepts is presented. Methods of combining modal responses resulting from a displacement response spectrum analysis are discussed, and a combination scheme called MRSS, Modified Root of Sum of Squares, is presented. Modal combination schemes using MRSS, SRSS, and ABS are compared to the results of a Modal Frequency Response analysis.

Ng Yat Chiu Patrick. / "Architecture Department, Chinese University of Hong Kong, Master of Architecture Programme 1997-98, design report." / Includes bibliographical references (leaves 112-113). / Synopsis / Existing State / Background of Hong Kong --- p.2-3 / Background of Astronomy --- p.4-7 / Astronomy in Hong Kong --- p.8 / Client Profile & Users Group --- p.9-11 / Site Selection --- p.12 / Site Analysis --- p.13-18 / Constraints --- p.19 / Opportunities --- p.20-21 / Discussion of Issues --- p.22-24 / Future State / Formulatoin of Program --- p.25-33 / List of Activities --- p.34 / Schedule of Accommodation --- p.35-36 / Design Proposal / Design Philosophy --- p.37 / Site Aspect --- p.38-41 / Design Development --- p.42-66 / Final Design / Site Approach --- p.67 / Site Zoning --- p.68 / Site Setting out --- p.69 / Museum Sequence --- p.70 / Modern Astronomy & Space Science Museum --- p.71 / Star Odyssey --- p.72 / Myth and Legend --- p.73 / Zodiac --- p.74 / Ancient Astronomical Instrument --- p.75 / Cosmology and Observatory --- p.76 / Reservoir and Water Edge --- p.77 / "Cafeteria, Internet Cafe & Contemporary Interest Topic" --- p.78 / Astronomical Observatory & Star Gazing Classroom --- p.79-80 / Environmental / Use of Energy --- p.81-86 / Lighting --- p.87-88 / Natural Ventilation --- p.89 / HVAC System --- p.90-91 / Plumping & Drainage --- p.92-93 / Life Safety / Means of Escape --- p.94-95 / Construction / General Structure --- p.96 / Special Structure --- p.97-98 / Construction Sequence --- p.99-101 / Cost Analysis Appendices --- p.102-103 / Appendices / Precedents Studies --- p.104-111 / Bibliography --- p.112-113 / Acknowledgement --- p.114