The Greatest Journey of Their Lives Will Not Only Be
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Seasonality and Surface Properties of Slope Streaks
51st Lunar and Planetary Science Conference (2020) 2556.pdf SEASONALITY AND SURFACE PROPERTIES OF SLOPE STREAKS. K. M. Primm, R. H. Hoover, H. H. Kaplan, and D. E. Stillman, Dept. of Space Studies, Southwest Research Institute, 1050 Walnut St. #300, Boulder, CO 80302, USA ([email protected]). Background: Slope streaks are large (up to 200 m Methods: We used images from the High wide, up to a few km long), relatively low-albedo Resolution Imagining Science Experiment (HiRISE) to streaks that occur in the dustiest locations on Mars [1]. study the fading rate of slope streaks, Context Camera They are one of the few currently active and (CTX) to create Digital Terrain Models (DTMs) to widespread geologic processes on the surface of Mars. study the slope angles, and lastly the Compact Many slope streaks have persisted for >15 Mars years Reconnaissance Imaging Spectrometer (CRISM) to and others have been observed to form, but many evaluate the mineralogy of slope streaks and the fewer have been seen to completely fade/disappear surrounding terrain. (e.g., [2]). This inconsistency leads us to believe Results: Preliminary observations show that hypothesize that slope streaks might have different within one area (within a few kms), there are slope formation and fading mechanisms depending on their streaks that completely fade within 1 Mars Year and environment. some that form within that same time frame (Fig. 1). There have been several studies of slope streaks The green circles in Fig. 1B shows the newly formed that examine a combination of parameters: slope angles [1,3], mineralogy [4-6], environmental factors, slope streaks and the red circle show the areas where and seasonality [2,7,8] but none have combined all the slope streaks have completely disappeared. -
Lexiconordica
LexicoNordica Forfatter: Hannu Tommola og Arto Mustajoki [Den förnyade rysk-finska storordboken] Anmeldt værk: Martti Kuusinen, Vera Ollikainen og Julia Syrjäläinen. 1997. Venäjä- suomi-suursanakirja (Bol ´šoj russko-finskij slovar´) yli 90.000 hakusanaa ja sanontaa. Porvoo/Helsinki/Juva: WSOY og Moskva: Russkij jazyk, 1997. Kilde: LexicoNordica 5, 1998, s. 239-260 URL: http://ojs.statsbiblioteket.dk/index.php/lexn/issue/archive © LexicoNordica og forfatterne Betingelser for brug af denne artikel Denne artikel er omfattet af ophavsretsloven, og der må citeres fra den. Følgende betingelser skal dog være opfyldt: Citatet skal være i overensstemmelse med „god skik“ Der må kun citeres „i det omfang, som betinges af formålet“ Ophavsmanden til teksten skal krediteres, og kilden skal angives, jf. ovenstående bibliografiske oplysninger. Søgbarhed Artiklerne i de ældre LexicoNordica (1-16) er skannet og OCR-behandlet. OCR står for ’optical character recognition’ og kan ved tegngenkendelse konvertere et billede til tekst. Dermed kan man søge i teksten. Imidlertid kan der opstå fejl i tegngenkendelsen, og når man søger på fx navne, skal man være forberedt på at søgningen ikke er 100 % pålidelig. 239 Hannu Tommola & Arto Mustajoki Den förnyade rysk-finska storordboken Martti Kuusinen, Vera Ollikainen, Julia Syrjäläinen: Venäjä-suomi- suursanakirja (Bol´soj russko-finskij slovar´) yli 90.000 hakusanaa ja sanontaa. Toim. M. Kuusinen. Porvoo, Helsinki, Juva: WSOY & Moskva: Russkij jazyk, 1997, XXXI + 1575 s. Pris: FIM 554. The dictionary reviewed in this article is a revised edition of a Russian-Finnish dictionary compiled by scholars in the former Soviet Karelia. The dictionary was first published in 1963 in Moscow, then reprinted twice by the Finnish publishing house WSOY. -
Martian Crater Morphology
ANALYSIS OF THE DEPTH-DIAMETER RELATIONSHIP OF MARTIAN CRATERS A Capstone Experience Thesis Presented by Jared Howenstine Completion Date: May 2006 Approved By: Professor M. Darby Dyar, Astronomy Professor Christopher Condit, Geology Professor Judith Young, Astronomy Abstract Title: Analysis of the Depth-Diameter Relationship of Martian Craters Author: Jared Howenstine, Astronomy Approved By: Judith Young, Astronomy Approved By: M. Darby Dyar, Astronomy Approved By: Christopher Condit, Geology CE Type: Departmental Honors Project Using a gridded version of maritan topography with the computer program Gridview, this project studied the depth-diameter relationship of martian impact craters. The work encompasses 361 profiles of impacts with diameters larger than 15 kilometers and is a continuation of work that was started at the Lunar and Planetary Institute in Houston, Texas under the guidance of Dr. Walter S. Keifer. Using the most ‘pristine,’ or deepest craters in the data a depth-diameter relationship was determined: d = 0.610D 0.327 , where d is the depth of the crater and D is the diameter of the crater, both in kilometers. This relationship can then be used to estimate the theoretical depth of any impact radius, and therefore can be used to estimate the pristine shape of the crater. With a depth-diameter ratio for a particular crater, the measured depth can then be compared to this theoretical value and an estimate of the amount of material within the crater, or fill, can then be calculated. The data includes 140 named impact craters, 3 basins, and 218 other impacts. The named data encompasses all named impact structures of greater than 100 kilometers in diameter. -
Pioneering the Red Planet
RVD NASA PIONEERING THE RED PLANET Adventures on Martian soil Mars has always obsessed humankind - the Red planet, the ‘New Earth’. And with the recent successful landing of NASA’s Curiosity rover, Mars is closer than ever. Ever since 1960, we have actively been sending probes and rovers to observe the planet, but not without defeat. The road to the red planet is long, and the landing is rough. And since we do not have the technology yet to bring pieces of Mars to our laboratories, we’ll have to bring the laboratories to Mars. TEXT Ivo van der Peijl and Marijn Veraart, Students Aerospace Engineering, President and Treasurer of the 27th Space Department. THE EARLY DAYS ther attempts, the Mars 4 through 7, were velocity of 1cm/s. The main task of the rov- Between October 10, 1960 and 1967, six all partially successful. They all gathered er was to examine rocks nearby the land- Mars missions were undertaken, ! ve by some data, but none of them were able to ing site. Equipped with an Alpha Particle the USSR and one by USA. This was maybe either enter the intended orbit, or make a X-ray Spectrometer (APXS), the composi- too ambitious for the early days, because successful landing. tion of rocks could be determined. two failed to reach earth orbit, two failed It was NASA who had the next success. The oldest Mars-related spacecraft that is to leave it and two had problems en route. The Viking 1 landed on the Martian sur- still in use today is the 2001 Mars Odys- It was December 20, 1967 when the Mari- face July 20, 1976, shortly followed by the sey. -
Separating Fact from Fiction in the Aiolian Migration
hesperia yy (2008) SEPARATING FACT Pages399-430 FROM FICTION IN THE AIOLIAN MIGRATION ABSTRACT Iron Age settlementsin the northeastAegean are usuallyattributed to Aioliancolonists who journeyed across the Aegean from mainland Greece. This articlereviews the literary accounts of the migration and presentsthe relevantarchaeological evidence, with a focuson newmaterial from Troy. No onearea played a dominantrole in colonizing Aiolis, nor is sucha widespread colonizationsupported by the archaeologicalrecord. But the aggressive promotionof migrationaccounts after the PersianWars provedmutually beneficialto bothsides of theAegean and justified the composition of the Delian League. Scholarlyassessments of habitation in thenortheast Aegean during the EarlyIron Age are remarkably consistent: most settlements are attributed toAiolian colonists who had journeyed across the Aegean from Thessaly, Boiotia,Akhaia, or a combinationof all three.1There is no uniformityin theancient sources that deal with the migration, although Orestes and his descendantsare named as theleaders in mostaccounts, and are credited withfounding colonies over a broadgeographic area, including Lesbos, Tenedos,the western and southerncoasts of theTroad, and theregion betweenthe bays of Adramyttion and Smyrna(Fig. 1). In otherwords, mainlandGreece has repeatedly been viewed as theagent responsible for 1. TroyIV, pp. 147-148,248-249; appendixgradually developed into a Mountjoy,Holt Parker,Gabe Pizzorno, Berard1959; Cook 1962,pp. 25-29; magisterialstudy that is includedhere Allison Sterrett,John Wallrodt, Mal- 1973,pp. 360-363;Vanschoonwinkel as a companionarticle (Parker 2008). colm Wiener, and the anonymous 1991,pp. 405-421; Tenger 1999, It is our hope that readersinterested in reviewersfor Hesperia. Most of trie pp. 121-126;Boardman 1999, pp. 23- the Aiolian migrationwill read both articlewas writtenin the Burnham 33; Fisher2000, pp. -
GLOBAL HISTORY of WATER and CLIMATE. M. H. Carr, U.S. Geological Survey, 345 Middlefield Road, Menlo Park CA 94025, USA ([email protected])
Fifth International Conference on Mars 6030.pdf GLOBAL HISTORY OF WATER AND CLIMATE. M. H. Carr, U.S. Geological Survey, 345 Middlefield Road, Menlo Park CA 94025, USA ([email protected]). Introduction: Despite acquisition of superb new ages.(05803,08205, 51304). In addition, areas that altimetry and imagery by Mars Global Surveyor, most appear densely dissected in Viking images commonly aspects of the water and climate story are likely to have poorly organized drainage patterns when viewed remain controversial. The relative roles of surface at the MOC scale (04304, 08905, 09306). Through- runoff and groundwater seepage in the formation of going valleys and an ordered set of tributaries are dif- valley networks are yet to be resolved as are the cli- ficult to discern. These areas more resemble terrestrial matic conditions required for their formation. Simi- thermokarst terrains than areas where fluvial proc- larly, the fate of the floodwaters involved in formation esses dominate. A few areas do, have more typical of the outflow channels remains unresolved. While the fluvial erosion patterns. At 26S, 84W numerous MOC images provide little supporting evidence for closely spaced tributaries feed larger valleys to form a proposed shorelines around an extensive global ocean dense, well integrated valley system (07705). Such [1], the altimetry suggests the presence of a bench at examples, are however, rare. constant altitude around the lowest parts of the north- Debates about the origin of valley networks have ern plains [2]. Here I describe some of the attributes of focused mainly on (1) the role of fluvial erosion versus the channels and valleys as seen in the early MOC other processes, (2) the relative roles of groundwaer images, summarize the evidence for climate change sapping and surface runoff, and (3) the climatic con- on Mars, and discuss some processes that might have ditions required for valley formation. -
Obituary "C" Index
Obituary "C" Index Copyright © 2004 - 2021 GRHS DISCLAIMER: GRHS cannot guarantee that should you purchase a copy of what you would expect to be an obituary from its obituary collection that you will receive an obituary per se. The obituary collection consists of such items as a) personal cards of information shared with GRHS by researchers, b) www.findagrave.com extractions, c) funeral home cards, d) newspaper death notices, and e) obituaries extracted from newspapers and other publications as well as funeral home web sites. Some obituaries are translations of obituaries published in German publications, although generally GRHS has copies of the German versions. These German versions would have to be ordered separately for they are kept in a separate file in the GRHS library. The list of names and dates contained herein is an alphabetical listing [by surname and given name] of the obituaries held at the Society's headquarters for the letter combination indicated. Each name is followed by the birth date in the first column and death date in the second. Dates may be extrapolated or provided from another source. Important note about UMLAUTS: Surnames in this index have been entered by our volunteers exactly as they appear in each obituary but the use of characters with umlauts in obits has been found to be inconsistant. For example the surname Büchele may be entered as Buchele or Bahmüller as Bahmueller. This is important because surnames with umlauted characters are placed in alphabetic order after regular characters so if you are just scrolling down this sorted list you may find the surname you are looking for in an unexpected place (i.e. -
Vertical Distribution of Dust in the Martian Atmosphere During Northern Spring and Summer: High‐Altitude Tropical Dust Maximum at Northern Summer Solstice N
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 116, E01007, doi:10.1029/2010JE003692, 2011 Vertical distribution of dust in the Martian atmosphere during northern spring and summer: High‐altitude tropical dust maximum at northern summer solstice N. G. Heavens,1,2 M. I. Richardson,3 A. Kleinböhl,4 D. M. Kass,4 D. J. McCleese,4 W. Abdou,4 J. L. Benson,4 J. T. Schofield,4 J. H. Shirley,4 and P. M. Wolkenberg4 Received 7 July 2010; revised 2 November 2010; accepted 12 November 2010; published 20 January 2011. [1] The vertical distribution of dust in Mars’ atmosphere is a critical unknown in the simulation of its general circulation and a source of insight into the lifting and transport of dust. Zonal average vertical profiles of dust opacity retrieved by Mars Climate Sounder show that the vertical dust distribution is mostly consistent with Mars general circulation model (GCM) simulations in southern spring and summer but not in northern spring and summer. Unlike the GCM simulations, the mass mixing ratio of dust has a maximum at 15– 25 km over the tropics during much of northern spring and summer: the high‐altitude tropical dust maximum (HATDM). The HATDM has significant and characteristic longitudinal variability, which it maintains for time scales on the order of or greater than those on which advection, sedimentation, and vertical eddy diffusion would act to eliminate both the longitudinal and vertical inhomogeneity of the distribution. While outflow from dust storms is able to produce enriched layers of dust at altitudes much greater than 25 km, tropical dust storm activity during the period in which the HATDM occurs is likely too rare to support the HATDM. -
March 21–25, 2016
FORTY-SEVENTH LUNAR AND PLANETARY SCIENCE CONFERENCE PROGRAM OF TECHNICAL SESSIONS MARCH 21–25, 2016 The Woodlands Waterway Marriott Hotel and Convention Center The Woodlands, Texas INSTITUTIONAL SUPPORT Universities Space Research Association Lunar and Planetary Institute National Aeronautics and Space Administration CONFERENCE CO-CHAIRS Stephen Mackwell, Lunar and Planetary Institute Eileen Stansbery, NASA Johnson Space Center PROGRAM COMMITTEE CHAIRS David Draper, NASA Johnson Space Center Walter Kiefer, Lunar and Planetary Institute PROGRAM COMMITTEE P. Doug Archer, NASA Johnson Space Center Nicolas LeCorvec, Lunar and Planetary Institute Katherine Bermingham, University of Maryland Yo Matsubara, Smithsonian Institute Janice Bishop, SETI and NASA Ames Research Center Francis McCubbin, NASA Johnson Space Center Jeremy Boyce, University of California, Los Angeles Andrew Needham, Carnegie Institution of Washington Lisa Danielson, NASA Johnson Space Center Lan-Anh Nguyen, NASA Johnson Space Center Deepak Dhingra, University of Idaho Paul Niles, NASA Johnson Space Center Stephen Elardo, Carnegie Institution of Washington Dorothy Oehler, NASA Johnson Space Center Marc Fries, NASA Johnson Space Center D. Alex Patthoff, Jet Propulsion Laboratory Cyrena Goodrich, Lunar and Planetary Institute Elizabeth Rampe, Aerodyne Industries, Jacobs JETS at John Gruener, NASA Johnson Space Center NASA Johnson Space Center Justin Hagerty, U.S. Geological Survey Carol Raymond, Jet Propulsion Laboratory Lindsay Hays, Jet Propulsion Laboratory Paul Schenk, -
Dikes of Distinct Composition Intruded Into Noachian-Aged Crust Exposed in the Walls of Valles Marineris Jessica Flahaut, John F
Dikes of distinct composition intruded into Noachian-aged crust exposed in the walls of Valles Marineris Jessica Flahaut, John F. Mustard, Cathy Quantin, Harold Clenet, Pascal Allemand, Pierre Thomas To cite this version: Jessica Flahaut, John F. Mustard, Cathy Quantin, Harold Clenet, Pascal Allemand, et al.. Dikes of dis- tinct composition intruded into Noachian-aged crust exposed in the walls of Valles Marineris. Geophys- ical Research Letters, American Geophysical Union, 2011, 38, pp.L15202. 10.1029/2011GL048109. hal-00659784 HAL Id: hal-00659784 https://hal.archives-ouvertes.fr/hal-00659784 Submitted on 19 Jan 2012 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. GEOPHYSICAL RESEARCH LETTERS, VOL. 38, L15202, doi:10.1029/2011GL048109, 2011 Dikes of distinct composition intruded into Noachian‐aged crust exposed in the walls of Valles Marineris Jessica Flahaut,1 John F. Mustard,2 Cathy Quantin,1 Harold Clenet,1 Pascal Allemand,1 and Pierre Thomas1 Received 12 May 2011; revised 27 June 2011; accepted 30 June 2011; published 5 August 2011. [1] Valles Marineris represents the deepest natural incision and HiRISE (High Resolution Imaging Science Experiment) in the Martian upper crust. -
Pacing Early Mars Fluvial Activity at Aeolis Dorsa: Implications for Mars
1 Pacing Early Mars fluvial activity at Aeolis Dorsa: Implications for Mars 2 Science Laboratory observations at Gale Crater and Aeolis Mons 3 4 Edwin S. Kitea ([email protected]), Antoine Lucasa, Caleb I. Fassettb 5 a Caltech, Division of Geological and Planetary Sciences, Pasadena, CA 91125 6 b Mount Holyoke College, Department of Astronomy, South Hadley, MA 01075 7 8 Abstract: The impactor flux early in Mars history was much higher than today, so sedimentary 9 sequences include many buried craters. In combination with models for the impactor flux, 10 observations of the number of buried craters can constrain sedimentation rates. Using the 11 frequency of crater-river interactions, we find net sedimentation rate ≲20-300 μm/yr at Aeolis 12 Dorsa. This sets a lower bound of 1-15 Myr on the total interval spanned by fluvial activity 13 around the Noachian-Hesperian transition. We predict that Gale Crater’s mound (Aeolis Mons) 14 took at least 10-100 Myr to accumulate, which is testable by the Mars Science Laboratory. 15 16 1. Introduction. 17 On Mars, many craters are embedded within sedimentary sequences, leading to the 18 recognition that the planet’s geological history is recorded in “cratered volumes”, rather than 19 just cratered surfaces (Edgett and Malin, 2002). For a given impact flux, the density of craters 20 interbedded within a geologic unit is inversely proportional to the deposition rate of that 21 geologic unit (Smith et al. 2008). To use embedded-crater statistics to constrain deposition 22 rate, it is necessary to distinguish the population of interbedded craters from a (usually much 23 more numerous) population of craters formed during and after exhumation. -
UNIVERSITY of PENNSYLVANIA Two Hundred Thirty-Fifth Commencement for the Conferring of Degrees
UNIVERSITY of PENNSYLVANIA Two Hundred Thirty-Fifth Commencement for the Conferring of Degrees FRANKLIN FIELD Tuesday, May 21, 1991 SEATING DIAGRAM Guests will find this diagram helpful in locating the approximate seating of the degree candidates. The seating roughly corresponds to the order by school in which the candidates for degrees are presented, beginning at top left with the College of Arts and Sciences. The actual sequence is shown in the Contents on the opposite page under Degrees in Course. Reference to the paragraph on page seven describing the colors of the candidates' hoods according to their fields of study may further assist guests in placing the locations of the various schools. STAGE Graduate Faculty Faculty Faculties Engineering Nursing Medicin College College Wharton Dentaline Arts Dental Medicine Veterinary Medicine Wharton Education Graduate Social Work Annenberg Contents Page Seating Diagram of the Graduating Students . 2 The Commencement Ceremony .. 4 Commencement Notes .. 6 Degrees in Course . 8 The College of Arts and Sciences .. 8 The College of General Studies . 17 The School of Engineering and Applied Science .. 18 The Wharton School .. 26 The Wharton Evening School .. 30 The Wharton Graduate Division .. 32 The School of Nursing .. 37 The School of Medicine .. 39 The Law School .. 40 The Graduate School of Fine Arts .. 42 The School of Dental Medicine .. 45 The School of Veterinary Medicine .. 46 The Graduate School of Education .. 47 The School of Social Work .. 49 The Annenberg School for Communication .. 50 The Graduate Faculties .. 51 Certificates .. 57 General Honors Program .. 57 Advanced Dental Education .. 57 Education .. 58 Fine Arts .. 58 Commissions .