134,144 research outputs found
The effect of the impact of comet Shoemaker Levy‐9 on Jupiter's aurorae
No full textWe present infrared spectra and images of the jovian aurorae taken at wavelengths sensitive to the H-3(+) molecular ion during the period around the impact of Comet Shoemaker Levy-9. The spectra were obtained using CGS4 on the United Kingdom Infrared Telescope and the images using NSF cam on NASA's Infrared Telescope Facility. Comparison with spectra obtained in May, 1993, shows that while the relative intensities of the northern and southern auroral zones prior to and during impact week (July 16 - 22, 1994) were broadly comparable with those of 1993, a few days after the last collision the northern aurora was considerably enhanced and its southern counterpart somewhat depressed. The north/south auroral ratio was returning to more normal values a week later. The effect of material drifting from the impact sites to the southern auroral zone is discussed in relation to these results
Far‐UV emissions from the SL9 impacts with Jupiter
No full textObservations with the International Ultraviolet Explorer (IUE) during the impacts of the fragments of comet D/Shoemaker-Levy 9 with Jupiter show far-UV emissions from the impact sites within a similar to 10 min time scale. Positive detections of H-2 Lyman and Werner band (1230-1620 Angstrom) and H-Ly alpha emissions are made for impacts K and S, and marginally for P2. No thermal continuum is observed. The radiated far-UV output was >10(21) ergs. The H-2 spectrum is consistent with electron collisional excitation if significant CH4 absorption is included. Such emissions could result from plasma processes generated by the impacts. Non-thermal excitation by the high altitude entry and explosion shocks may also be relevant. Emissions by Al+ (1671 Angstrom) and C (1657 Angstrom) of cometary origin are tentatively identified
Letter From Ira D. Landis to Alfred L. Shoemaker, October 29, 1949
No full textA handwritten letter from Ira D. Landis addressed to Alfred L. Shoemaker, dated October 29, 1949. Within, Landis encloses his paper entitled, The Dutch-Calcium Carbonate Compound , with hopes of it finding a home within Shoemaker\u27s Dutchman newspaper.https://digitalcommons.ursinus.edu/shoemaker_documents/1021/thumbnail.jp
Letter From Helen D. Witmer to Alfred L. Shoemaker, November 17, 1948
No full textA typed letter from Helen D. Witmer addressed to Alfred L. Shoemaker, dated November 17, 1948. Within, Witmer details her favorite all story about asking for directions in Columbia, Pennsylvania. She also details her family\u27s experiences growing up with Pennsylvania Dutch expressions and suggests Shoemaker look into the use of the word wonderful by people in Lancaster County.https://digitalcommons.ursinus.edu/shoemaker_documents/1031/thumbnail.jp
Letter From D. Edward Elder to Alfred L. Shoemaker, July 10, 1958
No full textA handwritten letter from D. Edward Elder of Harrisburg, Pennsylvania addressed to Alfred L. Shoemaker, dated July 10, 1958. Within, Elder informs Shoemaker of a rough drawing of a broadside of Adam and Eve that is enclosed within the letter.https://digitalcommons.ursinus.edu/shoemaker_documents/1010/thumbnail.jp
Letter From Willis D. Faust to Alfred L. Shoemaker, May 3, 1954
No full textA handwritten letter from Willis D. Faust addressed to Alfred L. Shoemaker, dated May 3, 1954. Within, Faust writes in response to an inquiry made on Shoemaker\u27s radio program involving Peter and Paul\u27s day on the church calendar and relates other stories from his childhood.https://digitalcommons.ursinus.edu/shoemaker_documents/1154/thumbnail.jp
Letter from William D. Pattison to Alfred L. Shoemaker, September 20, 1959
No full textA letter from William D. Pattison to Alfred L. Shoemaker, dated September 20, 1959. Within, Pattison informs Shoemaker of Walter Horn\u27s lectures about the history of Western barns and how they may relate to Pennsylvania barns.https://digitalcommons.ursinus.edu/shoemaker_documents/1222/thumbnail.jp
Letter From D. W. Thompson to Alfred L. Shoemaker, April 3, 1956
No full textA typed letter from D. W. Thompson addressed to Alfred L. Shoemaker, dated April 3, 1956. Within, Thompson provides a recipe for Scotch Cake, discusses the Pennsylvania Dutch term for taffy and speculates about sugar rings.https://digitalcommons.ursinus.edu/shoemaker_documents/1204/thumbnail.jp
Letter From Elizabeth D. Naftzinger to Alfred L. Shoemaker, February 10, 1948
No full textA handwritten letter from Elizabeth D. Naftzinger addressed to Alfred L. Shoemaker, dated February 10, 1948. Within, Naftzinger details how the last boy to arrive at school on Ash Wednesday was dubbed Esha Puddle and rolled in the school\u27s ash pile by the other boys.https://digitalcommons.ursinus.edu/shoemaker_documents/1124/thumbnail.jp
Interview of Mort D. Turner by Brian Shoemaker
No full textKey Individuals Mentioned
1. Edwin Hubble – p.2
2. Dr. Edgerton – p.2
3. Dr. Goddard – p.3
4. Dr. Werner von Braun – p.4
5. Laura Pérezy Mendez – p.4, 20
6. Tom Jones – p.6, 8, 16, 21, 34, 36, 41, 42
7. George Toney – p.7, 8, 41
8. Phil Smith – p.7, 8, 41, 42
9. President Eisenhower – p.7
10. John Mullingan – p.10, 29
11. Ed Zeller – p.10, 11, 15, 17, 19, 29
12. Ernie Angino – p.10
13. Bob Nichols – p.11
14. Charles Bentley – p.13
15. John Behrendt – p.13, 30
16. Cassidy – p.13
17. Harry Hess – p.17, 23
18. Frank Foley – p.17
19. Berty Crary – p.19, 20, 21, 25, 26, 42
20. George Llano – p.17, 41
21. Bernie Lettow – p.19
22. Joanne Church Dort – p.20
23. Lamont – p.21, 23, 25
24. Bob Dietz – p.23
25. Ed Thiel – p.24
26. Chet Langley – p.26
27. Gorden Robin – p.27
28. Lyle McGinnis – p.31
29. David Elliott – p.33, 35
30. Ned Colbert – p.33
31. Scott – p.36
32. Larry Frakes – p.36, 40
33. John Crowell – p.36
34. Finn Ronne – p.38
35. Jerry Huffman – p.41
36. Helen Gerasimou – p.42
37. Cruxent – p.45
38. Mary Alice McWhinney – p.46Dr. Turner graduated from the University of California, Berkeley, with a major in Geology in the Department of Mining in the College of Engineering. The Army Reserve permitted him to complete his college degree before going to Aberdeen Proving Grounds. At Aberdeen, Edwin Hubble assigned Mort to the exterior ballistics division, where his primary task was to photograph projectiles flying through the air. Later, he worked with Dr. Goddard in tracking rockets. Dr. Turner helped survey the White Sands Proving Ground and worked with Dr. Werner von Braun.
After leaving the army, Dr. Turner earned an M.S. in Geology and did the field work in Puerto Rico. Before completing his thesis, he accepted a position with the State Geological Survey in San Francisco. After a few years, he accepted a position as the State Geologist of Puerto Rico.
In 1959, Dr. Turner joined the National Science Foundation, Office of Polar Programs as a project officer. He served in many capacities until his retirement in 1985. It was considered desirable for him to have a Ph.D. He studied in the Department of Geology at Kansas and used his Puerto Rico work for part of the thesis. Upon return to NSF, he was in charge of geology and geophysics and recruited many of the important scientists during this time.
Dr. Turner discusses the problems of maintaining research projects when the budget is cut. He also discusses some of the ice core storage problems. In the 1960s and 1970s, the research projects tended toward large groups. It became difficult to convince scientists to do projects in Antarctic. The Bureau of Mines was interested in identifying and locating mineral deposits.
Dr. Turner observed that bureaucracy increased under the Nixon administration. The Navy resisted the sending of women scientists to Antarctica. The Navy did not want a scientist from the University of Venezuela to go because he was on the wrong side in the Spanish Civil War.
Upon Dr. Turner’s retirement from NSF in 1985, he went to the University of Colorado in Boulder.
Major Topics
1. Dr. Turner’s educational background.
2. His work for Edwin Hubble at the Aberdeen Proving Ground.
3. He photographed the flights of rockets developed by Dr. Goddard.
4. As an employee of California State Geological Survey he worked on industrial minerals.
5. His position as State Geologist in Puerto Rico.
6. National Science Foundation Office of Antarctic Programs.
7. The pressure to earn a Ph.D. the selection of Kansas, and how his work was handled at NSF are described.
8. The discovery of various fossils in Antarctica supported the continental drift theory.
9. Bureaucracy grew under President Nixon.
10. The transition from Navy to NSF funding is discussed.Funded by a grant from the National Science Foundation
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