Security Sector Reform: a Nordic – Baltic Agenda
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Quantitative Composition and Granulometry of Aeolian Bedforms in Endeavour and Gale Craters Inferred from Visible Near-Infrared Spectra
45th Lunar and Planetary Science Conference (2014) 1431.pdf QUANTITATIVE COMPOSITION AND GRANULOMETRY OF AEOLIAN BEDFORMS IN ENDEAVOUR AND GALE CRATERS INFERRED FROM VISIBLE NEAR-INFRARED SPECTRA. Mathieu G.A. Lapotre1, Bethany L. Ehlmann1,2, Raymond E. Arvidson3. 1Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA. 2Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA, 3Department of Earth & Planetary Sciences, Washington University in St. Louis, MO, USA. Introduction: Modern Mars is a wind world. Its ing Spectrometer for Mars (CRISM) visible near- surface hosts a variety of aeolian features, such as line- infrared spectra (VISIR). The goal of this study is to ar, barchan and star dunes, ripples, granule ripples, compare inversions made from orbit to ground truth yardangs and ventifacts [1]. Even though active sand provided by instruments aboard Opportunity at En- transport was observed at the surface [2], it is not clear deavour Crater, Terra Meridiani and Curiosity in Gale whether all of the preserved aeolian bedforms are ac- crater. tive. In particular, transverse aeolian ridges have been We use Hapke’s bidirectional reflectance spectros- suggested to be remnant dunes that formed under past copy theory [6] to invert for optical constants of miner- climatic conditions [3]. als from laboratory spectra [e.g., 7, 8]. These are used Sand transport is largely controlled by the size and to compute single scattering albedos of mineral the density of the grains [4]. Moreover, dunes and rip- endmember components of varying grain sizes. We use ples form in unimodally distributed sand particles from an atmospheric radiative transfer approach, DISORT different instabilities, and the wavelengths of these [9], to correct the CRISM spectra for the effects of the different bedforms do not have the same dependence Martian atmosphere. -
Acidic Fluids Across Mars: Detections of Magnesium-Nickel Sulfates
ACIDIC FLUIDS ACROSS MARS: DETECTIONS OF MAGNESIUM-NICKEL SULFATES. A. S. Yen1, D. W. Ming2, R. Gellert3, D. W. Mittlefehldt2, E. B. Rampe4, D. T. Vaniman5, L. M. Thompson6, R. V. Morris2, B. C. Clark7, S. J. VanBommel3, R. E. Arvidson8, 1JPL- Caltech ([email protected]), 2NASA-JSC, 3University of Guelph, 4Aerodyne Industries, 5Planetary Science Institute, 6University of New Brunswick, 7Space Science Insti- tute, 7Washington University in St. Louis. Introduction: Calcium, magnesium and ferric iron sulfates have been detected by the instrument suites on the Mars rovers. A subset of the magnesium sulfates show clear associations with nickel. These associations indicate Ni2+ co-precipitation with or substitution for Mg2+ from sulfate-saturated solutions. Nickel is ex- tracted from primary rocks almost exclusively at pH values less than 6, constraining the formation of these Mg-Ni sulfates to mildly to strongly acidic conditions. There is clear evidence for aqueous alteration at the rim of Endeavour Crater (Meridiani Planum), in the Murray formation mudstone (Gale Crater), and near Home Plate (Gusev Crater). The discovery of Mg-Ni sulfates at these locations indicates a history of fluid- rock interactions at low pH. Fig 1: Histogram showing significant concentrations Mars Rovers: The Mars Exploration Rovers of sulfur in APXS analyses by the three Mars rovers (MER), Spirit and Opportunity, landed in January 2004 (mean value: 6.6%). at Gusev Crater and Meridiani Planum, respectively. Spirit traversed over 7.7 km through 2210 sols of sur- face operations, and Opportunity is currently on the degraded rim of Endeavour Crater after 4600 sols and 44 km of traverse. -
Mars Reconnaissance Orbiter and Opportunity Observations Of
PUBLICATIONS Journal of Geophysical Research: Planets RESEARCH ARTICLE Mars Reconnaissance Orbiter and Opportunity 10.1002/2014JE004686 observations of the Burns formation: Crater Key Point: hopping at Meridiani Planum • Hydrated Mg and Ca sulfate Burns formation minerals mapped with MRO R. E. Arvidson1, J. F. Bell III2, J. G. Catalano1, B. C. Clark3, V. K. Fox1, R. Gellert4, J. P. Grotzinger5, and MER data E. A. Guinness1, K. E. Herkenhoff6, A. H. Knoll7, M. G. A. Lapotre5, S. M. McLennan8, D. W. Ming9, R. V. Morris9, S. L. Murchie10, K. E. Powell1, M. D. Smith11, S. W. Squyres12, M. J. Wolff3, and J. J. Wray13 1 2 Correspondence to: Department of Earth and Planetary Sciences, Washington University in Saint Louis, Missouri, USA, School of Earth and Space R. E. Arvidson, Exploration, Arizona State University, Tempe, Arizona, USA, 3Space Science Institute, Boulder, Colorado, USA, 4Department of [email protected] Physics, University of Guelph, Guelph, Ontario, Canada, 5Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California, USA, 6U.S. Geological Survey, Astrogeology Science Center, Flagstaff, Arizona, USA, 7 8 Citation: Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, Massachusetts, USA, Department Arvidson, R. E., et al. (2015), Mars of Geosciences, Stony Brook University, Stony Brook, New York, USA, 9NASA Johnson Space Center, Houston, Texas, USA, Reconnaissance Orbiter and Opportunity 10Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USA, 11NASA Goddard Space Flight Center, observations of the Burns formation: Greenbelt, Maryland, USA, 12Department of Astronomy, Cornell University, Ithaca, New York, USA, 13School of Earth and Crater hopping at Meridiani Planum, J. -
The Degradational History of Endeavour Crater, Mars. J. A
The Degradational History of Endeavour Crater, Mars. J. A. Grant1, T. J. Parker2, L. S. Crumpler3, S. A. Wilson1, M. P. Golombek2, and D. W. Mittlefehldt4, Smithsonian Institution, NASM CEPS, 6th at Independence SW, Washington, DC, 20560 ([email protected]), 2Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, 3New Mexico Museum of Natural History & Science, 1801 Mountain Rd NW, Albuquerque, NM, 87104, 4Astromaterials Research Office, NASA Johnson Space Center, 2101 NASA Parkway, Houston, TX 77058. Endeavour crater (2.28°S, 354.77°E) is a Noachian-aged 22 km-diameter impact structure of complex morphology in Meridiani Planum. The degradation state of the crater has been studied using Mars Reconnaissance Orbiter and Opportunity rover data. Exposed rim segments rise ~10 m to ~100 m above the level of the embaying Burns Formation and the crater is 200-500 m deep with the southern interior wall exposing over ~300 m relief. Both pre-impact rocks (Matijevic Formation) and Endeavour impact ejecta (Shoemaker Formation) are present at Cape York, but only the Shoemaker crops out (up to ~140 m) along the rim segment from Murray Ridge to Cape Tribulation. Study of pristine complex craters Bopolu and Tooting, and morphometry of other martian complex craters, enables us to approximate Endeavour’s pristine form. The original rim likely averaged 410 m ±200 m in elevation and a 250-275 m section of ejecta (±50-60 m) would have composed a significant fraction of the rim height. The original crater depth was likely between 1.5 km and 2.2 km. -
Atti Rss 2010
PREMESSA AGLI ATTI DELLO OTTAVO REGIONAL SEAPOWER SYMPOSIUM DI VENEZIA del Capo di Stato Maggiore della Marina Il Capo di Stato Maggiore della Marina Il Regional Seapower Symposium (RSS) di Venezia è l’evento che da ormai quattordici anni rappresenta uno dei principali strumenti utilizzati dalla Marina Militare per contribuire allo sviluppo della partnership internazionale e contribuire alla sicurezza marittima globale. Se è vero che il numero ed il livello dei partecipanti costituiscono un’indicazione attendibile dell’importanza di un evento, l’ottava edizione del RSS - che ha visto rappresentanti di 44 Marine che operano nel Mediterraneo Allargato e 20 Organizzazioni Internazionali e realtà militari e civili incontrarsi nella cornice lagunare – può senza dubbio essere definita un successo. Partendo dalla convinzione che il Dialogo e la Cooperazione conferiscano alla Maritime Security un valore aggiunto, rappresentandone un vero e proprio fattore abilitante, i lavori delle sessioni hanno analizzato, da differenti prospettive, il contributo di questo fondamentale binomio a concetti di grande attualità nello scenario marittimo internazionale: la Maritime Situational Awareness, le Maritime Security Operations e la Maritime Capacity Building. L’efficace combinazione di tali concetti consente di conseguire la Maritime Security in senso lato, fattore – quest’ultimo - che sta influenzando e condizionando l’organizzazione operativa delle Marine di tutto il mondo. Le discussioni, gli interventi e gli eventi collaterali di questo Simposio hanno evidenziato l’importanza di una partnership forte ed attiva - sul versante internazionale come su quello nazionale - per un’efficace risposta e contrasto alle sfide che l’attuale ambiente marittimo in continua evoluzione ci pone: la pirateria, il terrorismo e tutte le altre attività illecite che trovano in mare il proprio spazio di manovra rappresentano gli esempi più attuali. -
LAYERED SULFATE-BEARING TERRAINS on MARS: INSIGHTS from GALE CRATER and MERIDIANI PLANUM. K.E. Powell1,2, R.E. Arvidson3, and C.S
Ninth International Conference on Mars 2019 (LPI Contrib. No. 2089) 6316.pdf LAYERED SULFATE-BEARING TERRAINS ON MARS: INSIGHTS FROM GALE CRATER AND MERIDIANI PLANUM. K.E. Powell1,2, R.E. Arvidson3, and C.S. Edwards1, 1Department of Physics & Astrono- my, Northern Arizona University, 2School of Earth & Space Exploration, Arizona State University, 3Department of Earth & Planetary Sciences, Washington University in St. Louis. Introduction: Sulfate species have been detected ronment, with episodes of diagenesis and weathering in late Noachian and Hesperian terrains on Mars lying to form a crystalline hematite lag deposit [4, 5]. The stratigraphically above clay minerals, which has been lag deposit masks the CRISM spectral signature of interpreted as documenting a shift from wetter to more sulfate in most locations. Sulfate minerals including arid environments on the surface. Sulfate detections kieserite and gypsum have been detected in impact are associated with layered deposits in numerous loca- crater walls and windswept regions [6]. The Oppor- tions including Gale Crater, Meridiani Planum, Vallis tunity rover explored southern Meridiani Planum Marineris, and Terra Sirenum, and Aram Chaos [1]. through a campaign of crater-hopping, using craters as These sulfates and clays been identified using their a natural drill to expose strata [6]. The deepest expo- diagnostic absorption features in visible and near- sures explored by Opportunity directly are ~10 meters infrared reflectance (VNIR) data acquired from Mars thick at Victoria Crater. Opportunity results indicate orbit. Additionally, two rover missions have explored that the top layers of Burns formation contain up to sites with massive sulfate deposits. The first, the MER 40% sulfate and included Mg, Ca, and Fe species. -
Opening a New Chapter in the Martian Chronicles
California Institute of Technology Volume 2., No.• ~emlMr1"2 B•• ed on d.t. from the 1975 Viking ml ••lon , the Explore". Guide to MoIr • .... pon Arden Albee'. w a ll will be In for . ome updating once Ma ,. Ob.erve r be g in. It ••urv e v of the planet late ne xt vear. Albee ke ep. a replica of the .pacecraft In Caltech'. Office of Graduate Studle., w" .. e In addition to hi. role a. Ob.e rver project .clentl.t, he'. been dean . lnce1984. Opening a new chapter in the Martian Chronicles BV Heidi Aapaturlan Speaking this past August at a many Mars aficionados ever since the working in concert like an interplan "It's not cleat what sort of geologic NASA press conference called to herald Viking Lander's soil experimencs came etary one-man band, will monitor and dynamics might have produced this che upcoming launch of Mars Observer, up empty in 1975: has life ever map Mars with a sweep and precision dichotomy," says Albee, alchough he Cal tech Professor of Geology Arden evolved on Mars? Did the planet once that is expected to yield more informa suspects that the answer may start to Albee sounded ar rimes like a man who harbor a bacterial Atlantis that van tion abour the planer's composition, emerge once ic's determined whether had jusc been commissioned to write ished, along with its water, aeons ago? climate, geology, and evolutionary Mars, like Earth, has a magnetic field. the lyrics for the Marcian version of Although no one expects the Mars history than all previous miss ions co Currenc theory holds that a planet'S "America che Beauciful." "We know Observer, launched September 25 from Mars put together. -
Mineralogy of the Martian Surface
EA42CH14-Ehlmann ARI 30 April 2014 7:21 Mineralogy of the Martian Surface Bethany L. Ehlmann1,2 and Christopher S. Edwards1 1Division of Geological & Planetary Sciences, California Institute of Technology, Pasadena, California 91125; email: [email protected], [email protected] 2Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109 Annu. Rev. Earth Planet. Sci. 2014. 42:291–315 Keywords First published online as a Review in Advance on Mars, composition, mineralogy, infrared spectroscopy, igneous processes, February 21, 2014 aqueous alteration The Annual Review of Earth and Planetary Sciences is online at earth.annualreviews.org Abstract This article’s doi: The past fifteen years of orbital infrared spectroscopy and in situ exploration 10.1146/annurev-earth-060313-055024 have led to a new understanding of the composition and history of Mars. Copyright c 2014 by Annual Reviews. Globally, Mars has a basaltic upper crust with regionally variable quanti- by California Institute of Technology on 06/09/14. For personal use only. All rights reserved ties of plagioclase, pyroxene, and olivine associated with distinctive terrains. Enrichments in olivine (>20%) are found around the largest basins and Annu. Rev. Earth Planet. Sci. 2014.42:291-315. Downloaded from www.annualreviews.org within late Noachian–early Hesperian lavas. Alkali volcanics are also locally present, pointing to regional differences in igneous processes. Many ma- terials from ancient Mars bear the mineralogic fingerprints of interaction with water. Clay minerals, found in exposures of Noachian crust across the globe, preserve widespread evidence for early weathering, hydrothermal, and diagenetic aqueous environments. Noachian and Hesperian sediments include paleolake deposits with clays, carbonates, sulfates, and chlorides that are more localized in extent. -
Ceramics from Wet-Processing of Martian Soil Simulant Using Slip Casting Or Additive Manufacturing for In-Situ Resource Utilization
DOI: 10.13009/EUCASS2019-769 Ceramics from wet-processing of Martian soil simulant using slip casting or Additive Manufacturing for in-situ resource utilization on Mars David Karl # *, Franz Kamutzki*, Andrea Zocca**, Pedro Lima**, Oliver Goerke*, Jens Guenster** and Aleksander Gurlo* * Fachgebiet Keramische Werkstoffe / Chair of Advanced Ceramic Materials, TU Berlin, Germany. ** Bundesanstalt für Materialforschung und –prüfung (BAM), Berlin, Germany. # Corresponding author. E-mail: [email protected] Abstract For future colonization of Planet Mars, the most realistic approach for the production of parts on site is in situ resource utilization (ISRU). In this study, we demonstrate the feasibility of this concept by producing objects of varying complexity exclusively using resources that can be found on the surface of Mars. The established production routes using slip casting and Additive Manufacturing via wet- processing of Mars simulant material are simple, robust and easily transferable even to the harsh conditions on Mars. After sintering our slip cast parts have mechanical properties comparable to commercially available porcelain, making them suitable for everyday use. 1. Introduction A promising concept for the exploration and subsequent colonization of Moon and Mars is in-situ resource utilization (ISRU) - collecting, processing and storing of native materials that are encountered during human or robotic space exploration [1]. Early colonization scenarios suggest the direct use of rock-covering loose granular surface media (including dust, soil and rubble) consisting of various oxide minerals called lunar and Mars regoliths. The chemical composition of lunar and Mars regolith makes the extraction of metals and ceramics conceivable. The availability of ceramic tools is an important prerequisite for melting regolith in blast furnaces and bloomeries for the production of base metals. -
Scientific Acivities 2013 – 2018
Bilder über Kopf- und Fußzei Scientific Acivities 2013 – 2018 1 Scientific Activities 2013-2018 (as of 19.03.2019) This report covers scientific activities of DFD and University of Würzburg staff in the time period between January 1, 2013 and December 31, 2018. Teaching and Education ............................................................................................................................................. 3 Lectures at Universities ............................................................................................................................................ 3 Invited Guest Lectures at Universities ....................................................................................................................... 9 Non-University Courses and Tutorials ..................................................................................................................... 12 Internal Seminar Series .......................................................................................................................................... 17 Contributions ........................................................................................................................................................ 17 In-House Interns and Trainees ................................................................................................................................ 17 Academic Degrees ................................................................................................................................................... -
An Edition of Guta Saga with Introduction, Translation
An Edition ofGuta Saga with Introduction, Translation, Commentary and Glossary edited by Christine Ingegerd Peel UNIVERSITY COLLEGE LONDON Degree of MPhil 1998 ProQuest Number: U642093 All rights reserved INFORMATION TO ALL USERS The quality of this reproduction is dependent upon the quality of the copy submitted. In the unlikely event that the author did not send a complete manuscript and there are missing pages, these will be noted. Also, if material had to be removed, a note will indicate the deletion. uest. ProQuest U642093 Published by ProQuest LLC(2015). Copyright of the Dissertation is held by the Author. All rights reserved. This work is protected against unauthorized copying under Title 17, United States Code. Microform Edition © ProQuest LLC. ProQuest LLC 789 East Eisenhower Parkway P.O. Box 1346 Ann Arbor, Ml 48106-1346 Guta Saga 2 Abstract The following thesis is an edition of the text of Guta saga found in the fourteenth-century manuscript of G uta la g It is held in Kungliga Biblioteket, Stockholm and designated B64. In the manuscript the text covers the last eight leaves. It represents the only complete version of the text in Gutnish, the medieval language of Gotland. The Introduction contains a section on the historical background to the text and a discussion of the following: preservation, content, sources (both written and oral), date and place of composition, authorship, historical value, language and previous editions of the text. The principles of the current edition are described. The text of the manuscript is normalized and contains a number of emendations, which are signalled in footnotes. -
Current Issues Concerning Croatian Coast Guard Role in Marine
Current Issues Concerning Croatian Coast Guard Role in Marine Casualty Investigation Aktualna problematika uloge obalne straže Republike Hrvatske u istraživanju pomorskih nesreća Željka Primorac University of Split Faculty of Law DOI 10.17818/NM/2019/1.5 Split UDK 347.79(457.5) email: [email protected] Review / Pregledni rad Paper accepted / Rukopis primljen: 5. 11. 2018. Summary In the Republic of Croatia significant amendments of the Maritime Code are being KEY WORDS prepared. Among the provisions outlined in the Draft proposal for amending the Maritime Croatian Coast Guard Code of August 2018 there are the provisions on marine casualty investigation (defining marine casualty investigation the concept of marine casualty, dividing marine casualties on very serious marine casualties and serious marine casualties, regulating the procedure of conducting marine casualty investigations and jurisdiction for their enforcement) adopted to improve maritime safety. In view of a continuing trend towards increasing numbers of marine casualties in EU, in this paper the author points out the importance of the topic and critically analyses certain provisions of the national legal system on marine casualties safety investigation activities (Draft proposal for amending the Maritime Code of 2018, Regulation on the manner and conditions for conducting safety investigations of marine casualties and incidents of 2015 and Coast Guard Law of the Republic of Croatia of 2007). The aim of this scientific research is to detect the deficiencies in the national