記録された日時: July 14 2011

Duration: 56 minutes 22 seconds

In this webinar we'll consider the background to the manufacture of the NASA/USGS lunar simulant NU-LHT-1M and the characterization of this material by the Malvern Mastersizer 2000 and Morphologi G3 instruments.
Table of contents
1. Introduction
01:07
2. Overview
01:00
3. One small step…
00:49
4. The wonder of science
00:43
5. Obligatory opening quotation
00:39
6. Why?
00:51
7. “Dust is the number one concern in returning to the moon”
00:36
8. Lunar ‘Dust’ http://www.hq.nasa.gov/alsj/TM-2005-213610.pdf
01:16
9. Space – the final frontier
00:47
10. What is regolith?
01:25
11. Lunar regolith – what’s different from the perspective of a particle
01:29
12. The real thing
01:48
13. Size range of lunar regolith and simulant http://www.lpi.usra.edu/lunar/strategies/jsc_lunar_simulant.pdf
01:00
14. Lunar Simulant Why?
02:13
15. The Regolith Challenge
01:45
16. http://thelaunchpad.xprize.org/2009_10_18_archive.html
00:36
17. http://isru.msfc.nasa.gov/lib/Documents/Simulant-listing.pdf
01:36
18. Anorthosite on the lunar surface
00:14
19. Care!
01:19
20. NU-LHT-1M
00:55
21. USGS/NASA lunar regolith simulant
00:44
22. Consider the difficulty of the issues…
01:15
23. Abrasion – the real final frontier…
00:39
24. Abrasion
01:15
25. Wm. Mackie ”On the laws that govern the rounding of grains of sand” Transactions of the Edinburgh Geological Society 7(3), 298-311, (1897) April 28th 1856 - July 15th 1932 Place of Birth: Loanends of Durno, Chapel of Garioch, Aberdeenshire
01:05
26. Chester K Wentworth – 1919 A laboratory and field study of cobble abrasion
01:00
27. Chester Wentworth – 1919 A laboratory and field study of cobble abrasion
00:39
28. Chester Wentworth – 1919 (May 7th, 1891 – January 1969) A laboratory and field study of cobble abrasion
00:42
29. Wentworth – 1922 Early use of scattergrams?
00:38
30. Shapometer Allen C Tester Science, 1931
01:08
31. R Dana Russell & Ralph E Taylor 1937 – Mississippi River Sands
01:07
32. Krumbein, 1941
00:53
33. Krumbein, 1941
00:29
34. Krumbein, 1941
00:55
35. Krumbein, 1941
01:08
36. Krumbein, 1938 Surface texture, S
00:53
37. W C Krumbein & F J Pettijohn Manual of Sedimentary Petrography (1938) Chapter 12 “Surface textures of sedimentary fragments and particles” pp 303-308 5½ pages only Chapter 11 is “Shape and Roundness” (recommended for history)
00:43
38. W C Krumbein & F J Pettijohn Manual of Sedimentary Petrography (1938) Chapter 12 “Surface textures of sedimentary fragments and particles”
00:40
39. Quick shape
00:48
40. Wadell
00:22
41. Wadell – from Krumbein/Pettijohn
01:05
42. Harold Heywood
00:29
43. Heywood Factor
01:29
44. ISO 9276-6: 2008 Representation of results of particle size analysis -- Part 6: Descriptive and quantitative representation of particle shape and morphology
01:04
45. ISO13322-x
00:22
46. Shape – the real thing? Based on definition and resolution
01:14
47. The size distribution - wet and dry See: http://isru.msfc.nasa.gov/lib/Documents/particlesize/LHT-1M/Malvern/Size/LHT-1Msize_Malvern2102_Report.pdf
01:03
48. Minimum Mass (based on Gy statistics)
01:04
49. Best Fundamental Sampling Error (FSE)
01:43
50. Number distribution
00:37
51. The shape distribution
00:42
52. Eric Pirard Personal communication October 5th, 2010 06:21 AM
00:50
53. Shape distribution
00:41
54. Pictures – 103 (or 1E3) words? NU-LHT-1M (Batch 26)
00:37
55. Pictures – 103 (or 1E3) words? NU-LHT-1M (Batch 121; 75 – 300mm fraction)
00:42
56. Fines fraction – 4 bar dispersion
00:16
57. Figures of Merit for simulant
00:37
58. ISO standard
00:10
59. One example – particle size
00:32
60. Standardization ISO/CD 10788 Space systems -- Lunar dust simulant From: ISO TC 20/SC 14 Space Systems and Operations Standardization
00:13
61. From the draft…
00:12
62. Summary
01:03
63. Acknowledgments and thank you
00:26