Curriculum Vitae
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Planetary Surfaces
Chapter 4 PLANETARY SURFACES 4.1 The Absence of Bedrock A striking and obvious observation is that at full Moon, the lunar surface is bright from limb to limb, with only limited darkening toward the edges. Since this effect is not consistent with the intensity of light reflected from a smooth sphere, pre-Apollo observers concluded that the upper surface was porous on a centimeter scale and had the properties of dust. The thickness of the dust layer was a critical question for landing on the surface. The general view was that a layer a few meters thick of rubble and dust from the meteorite bombardment covered the surface. Alternative views called for kilometer thicknesses of fine dust, filling the maria. The unmanned missions, notably Surveyor, resolved questions about the nature and bearing strength of the surface. However, a somewhat surprising feature of the lunar surface was the completeness of the mantle or blanket of debris. Bedrock exposures are extremely rare, the occurrence in the wall of Hadley Rille (Fig. 6.6) being the only one which was observed closely during the Apollo missions. Fragments of rock excavated during meteorite impact are, of course, common, and provided both samples and evidence of co,mpetent rock layers at shallow levels in the mare basins. Freshly exposed surface material (e.g., bright rays from craters such as Tycho) darken with time due mainly to the production of glass during micro- meteorite impacts. Since some magnetic anomalies correlate with unusually bright regions, the solar wind bombardment (which is strongly deflected by the magnetic anomalies) may also be responsible for darkening the surface [I]. -
The Mystery of Methane on Mars and Titan
The Mystery of Methane on Mars & Titan By Sushil K. Atreya MARS has long been thought of as a possible abode of life. The discovery of methane in its atmosphere has rekindled those visions. The visible face of Mars looks nearly static, apart from a few wispy clouds (white). But the methane hints at a beehive of biological or geochemical activity underground. Of all the planets in the solar system other than Earth, own way, revealing either that we are not alone in the universe Mars has arguably the greatest potential for life, either extinct or that both Mars and Titan harbor large underground bodies or extant. It resembles Earth in so many ways: its formation of water together with unexpected levels of geochemical activ- process, its early climate history, its reservoirs of water, its vol- ity. Understanding the origin and fate of methane on these bod- canoes and other geologic processes. Microorganisms would fit ies will provide crucial clues to the processes that shape the right in. Another planetary body, Saturn’s largest moon Titan, formation, evolution and habitability of terrestrial worlds in also routinely comes up in discussions of extraterrestrial biology. this solar system and possibly in others. In its primordial past, Titan possessed conditions conducive to Methane (CH4) is abundant on the giant planets—Jupiter, the formation of molecular precursors of life, and some scientists Saturn, Uranus and Neptune—where it was the product of chem- believe it may have been alive then and might even be alive now. ical processing of primordial solar nebula material. On Earth, To add intrigue to these possibilities, astronomers studying though, methane is special. -
Environmental Philosophy and the Ethics of Terraforming Mars
ENVIRONMENTAL PHILOSOPHY AND THE ETHICS OF TERRAFORMING MARS: ADDING THE VOICES OF ENVIRONMENTAL JUSTICE AND ECOFEMINISM TO THE ONGOING DEBATE Robert Heath French Thesis Prepared for the Degree of MASTER OF ARTS UNIVERSITY OF NORTH TEXAS August 2013 APPROVED: Robert Figueroa, Committee Chair Eugene Hargrove, Committee Member Adam Briggle, Committee Member Patricia Glazebrook, Chair of the Department of Philosophy and Religion Studies Mark Wardell, Dean of the Toulouse Graduate School French, Robert Heath. Environmental Philosophy and the Ethics of Terraforming Mars: Adding the Voices of Environmental Justice and Ecofeminism to the Ongoing Debate. Master of Arts (Philosophy), August 2013, 133 pp., 1 table, bibliography, 78 titles. Questions concerning the ethics of terraforming Mars have received some attention from both philosophers and scientists during recent decades. A variety of theoretical approaches have been supplied by a number of authors, however research pursuant to this thesis has indicated at least two major blindspots in the published literature on the topic. First, a broad category of human considerations involving risks, dangers, and social, political, and economic inequalities that would likely be associated with efforts to terraform Mars have been woefully overlooked in the published literature to date. I attempt to rectify that oversight by employing the interpretive lens of environmental justice to address questions of environmental colonialism, equality in terms of political participation and inclusion in decision making structures, risks associated with technological progressivism, and responses to anthropogenic climate change. Only by including the historically marginalized and politically disenfranchised “voices,” of both humans and nonhumans, can any future plan to terraform Mars be deemed ethical, moral or just according to the framework provided by environmental justice. -
TIME Space Newsletter September 10, 2019
TIME Space Newsletter September 10, 2019 Dear readers, Not a lot of people would want to go back to the Paleocene Epoch. For one thing, the dinosaurs were only beginning to die out, and while they'd be nifty to see, they were murder on mammals. It would be a good 65 million years before humans got a literal toe-hold on the world. The Eocene wouldn't be much better. It was around that time that what is now the Indian subcontinent crashed into Asia, and while all that produced some lovely mountains, there was a lot of slo-mo violence of clashing plates before things settled down. As far as epochs go, the Holocene is everyone's favorite. It started close to 12,000 years ago, as the last Ice Age was ending, and produced the conditions that allowed all the species we love best—ourselves, and charismatic megafauna like the bald eagle, the panda and the tiger—to thrive. From humanity's perspective, it would be perfectly fine if the Holocene went on forever. But it won't. It's ending now—it may have already ended in the 1950s, according to some scientists—to be replaced by the Anthropocene. The name says it all: it's an epoch in which one species—ours, anthro—became the leading driver of the state of the planet, more powerful, at least in the short-term, than the larger forces of geology, meteorology, even biology. We have, of course, abused that power, fouling the air, annihilating species, wiping out forests and distorting the climate. -
The Search for Extreme Life
BIOCHEMIST_BARUCH S. BLUMBERG The Search for Extreme Life ofile If microorganisms exist on other worlds, the head of NASA’s fledgling Astrobiology Institute plans to find them he relentless heat cooks the the space agency aims to someday find “Technology is available to decipher Pr Badwater region of California’s on other worlds. the intricacies of this cause-and-effect Death Valley so thoroughly that “I always liked the idea of doing field- chain” that wasn’t available even five some expanses are textured like work, exploring, going out and finding years ago, Blumberg notes, citing in par- Tdry serpent skin. At some 284 feet below new things,” Blumberg says back at NAI ticular advances achieved through the sea level—North America’s lowest point— headquarters, which is nestled near Sili- Human Genome Project. The 1996 an- it is perhaps the hottest place on the sur- con Valley at the NASA Ames Research nouncement of potential fossilized life in face of the earth: the temperature once Center at Moffett Field. Out of his desert a Martian meteorite known as ALH84001 peaked at a record 53.01 degrees Celsius garb, the outdoors-loving Blumberg looks boosted enthusiasm worldwide. Even (127.4 degrees Fahrenheit). Out here, a good decade younger than his 75 years. Congress, which had quashed NASA’s blood-pumping mammals are scarce. It At the job only since last September, Blum- search for extraterrestrial intelligence may seem unfitting to find a Nobel Prize berg is trying to marshal gaggles of as- (SETI) program in 1993, became recep- winner, renowned for hepatitis B work, tronomers, chemists, ecologists, geologists, tive. -
Strategies for Detecting Biological Molecules on Titan
ASTROBIOLOGY Volume 18, Number 5, 2018 ª Mary Ann Liebert, Inc. DOI: 10.1089/ast.2017.1758 Strategies for Detecting Biological Molecules on Titan Catherine D. Neish,1 Ralph D. Lorenz,2 Elizabeth P. Turtle,2 Jason W. Barnes,3 Melissa G. Trainer,4 Bryan Stiles,5 Randolph Kirk,6 Charles A. Hibbitts,2 and Michael J. Malaska5 Abstract Saturn’s moon Titan has all the ingredients needed to produce ‘‘life as we know it.’’ When exposed to liquid water, organic molecules analogous to those found on Titan produce a range of biomolecules such as amino acids. Titan thus provides a natural laboratory for studying the products of prebiotic chemistry. In this work, we examine the ideal locales to search for evidence of, or progression toward, life on Titan. We determine that the best sites to identify biological molecules are deposits of impact melt on the floors of large, fresh impact craters, specifically Sinlap, Selk, and Menrva craters. We find that it is not possible to identify biomolecules on Titan through remote sensing, but rather through in situ measurements capable of identifying a wide range of biological molecules. Given the nonuniformity of impact melt exposures on the floor of a weathered impact crater, the ideal lander would be capable of precision targeting. This would allow it to identify the locations of fresh impact melt deposits, and/or sites where the melt deposits have been exposed through erosion or mass wasting. Determining the extent of prebiotic chemistry within these melt deposits would help us to understand how life could originate on a world very different from Earth. -
Slope - Geologic Age Relationships in Complex Lunar Craters C
49th Lunar and Planetary Science Conference 2018 (LPI Contrib. No. 2083) 2399.pdf SLOPE - GEOLOGIC AGE RELATIONSHIPS IN COMPLEX LUNAR CRATERS C. Rojas1, P. Mahanti1, M. S. Robinson1, LROC Team1, 1LROC Science Operation Center, School of Earth and Space Exploration, Arizona State University, Tempe, Arizona ([email protected]) Table 1: List of complex craters. *Copernican craters Introduction: Impact events leading to formation Crater D (km) Model Age (Ga) Lon Lat of basins and large craters dominate the early history Moore F* 24 0.041∓0.012 [8] 37.30 185.0 of the Moon [1] leading to kilometer scale topographic Wiener F* 30 0.017∓0.002 149.9740.90 variations on the lunar surface, with smaller crater [2], Klute W* 31 0.090∓0.007 216.7037.98 progressively introducing higher frequency topography. Necho* 37 0.080∓0.024 [8] 123.3 –5.3 Crater wall slopes represent most of the overall topo- Aristarchus* 40 0.175∓0.0095 312.5 23.7 graphic variation since many locations on the Moon are Jackson* 71 0.147∓0.038 [9] 196.7 22.1 craters. While impact events lead to the formation of McLaughlin 75 3.7∓0.1 [10] 267.1747.01 steep slopes [3], they are also primarily responsible for Pitiscus 80 3.8∓0.1 [10] 30.57 -50.61 landform degradation [4]. During crater formation, tar- Al-Biruni 80 3.8∓0.1 [10] 92.62 18.09 get properties and processes controlling structural sta- La Pérouse 80 3.6∓0.1 [10] -10.66 76.18 bility limit maximum slopes [4]. -
1876-09-09.Pdf
KVOL. VI. DOVER, MORRIS COUNTY, NEW JERSJEY, SATURDAY, SEPTEMBER U, 1870. NO. 39 Curds. POKTIC. 1 E'IVIK'II l»:n I. i THE IRON ERA A few mouths ago two gen'lcmen wenl A family on Pine strciit oo a jiup o Perhaps the uwat ftimilinr of inybtori- IS VAIX. xcerr THAT ^OUE WORE IIUDI; OIIS'A A fumily named Smith ban recently (niflHfuirids nro tlirm protlnciul liv Uiu fCDUauiffi Busy SATCIDAT I t K. A. BENNETT, Af. D , .HIVIJI] toOenminlowiJ, uml Mr, Brown s"[iut to fiKbt a duel upropus of an nclrcss, the KcnTouQdliitid brand—ono of U.HSI Ah, paldoti nith tliu Iruntlng njljn, AND OT1IEI13 WEIIB TATTOOI'D. add 11)13 ia Iiotr inntturs p:mai!tl: 51.libyful creatures with misehkvaitH even, Yi'Dtrifaqniat; fitniiliar, 1JUC.IIIHB ulfiioat .J.V, <m Saturday, leaned ovor tbo fence every country fair ia vitritcid liy one ur BENJ.II.VOGT. HOMCEOPATHIC Tlii.ii; ii. M luiili:Lire sivain! nmt Riive to our rejinricir nia im|»reHsiooH Fcuillit-rndo and OHiviur, tbe flnt "*w- Vhv. family are very niucj ultachuil to it. Yon may wait till the cnm',03 Hrlligbl diou, y nn tb b tinted" by MM. Peilcller and Gitillurd. Iu tbetio hard tiuiiu tu become uttncli n dUit'r of tha-e exbibitorii, niyhterifius, EDITOR i«o pr.oniF.Tor,. nf Mr. Hinitb'abuy, a li'd ubuutfmirtocu bcL-aiiMo tlio r«nl Knurco of suUnd d<ip« PHYSICIAN & SUKGKOX, Till Ilia fliry stjin tlnHli nut hi tbo ekk-a, 187C, iirnviuE ul H*tug KOUK yeiii-H old: tbcRPCond by MM. -
All Roads in County (Updated January 2020)
All Roads Inside Deschutes County ROAD #: 07996 SEGMENT FROM TO TRS OWNER CLASS SURFACE LENGTH (mi) <null> <null> 211009 Other Rural Local Dirt-Graded <null> County Road Length: 0 101ST LN ROAD #: 02265 SEGMENT FROM TO TRS OWNER CLASS SURFACE LENGTH (mi) 10 0 101ST ST 0.262 END BULB 151204 Deschutes County Rural Local Macadam, Oil 0.262 Mat County Road Length: 0.262 101ST ST ROAD #: 02270 SEGMENT FROM TO TRS OWNER CLASS SURFACE LENGTH (mi) 10 0 HWY 126 0.357 MAPLE LN, NW 151204 Deschutes County Rural Local Macadam, Oil 0.357 Mat 20 0.357 MAPLE LN, NW 1.205 95TH ST 151203 Deschutes County Rural Local Macadam, Oil 0.848 Mat County Road Length: 1.205 103RD ST ROAD #: 02259 SEGMENT FROM TO TRS OWNER CLASS SURFACE LENGTH (mi) <null> <null> 151209 Local Access Road Rural Local AC <null> <null> <null> 151209 Unknown Rural Local AC <null> 40 2.75 BEGIN 3.004 COYNER AVE, 141228 Deschutes County Rural Local Macadam, Oil 0.254 NW Mat County Road Length: 0.254 105TH CT Page 1 of 975 \\Road\GIS_Proj\ArcGIS_Products\Road Lists\Full List 2020 DCRD Report 1/02/2020 ROAD #: 02261 SEGMENT FROM TO TRS OWNER CLASS SURFACE LENGTH (mi) 10 0 QUINCE AVE, NW 0.11 END BUBBLE 151204 Deschutes County Rural Local Macadam, Oil 0.11 Mat County Road Length: 0.11 10TH ST ROAD #: 02188 SEGMENT FROM TO TRS OWNER CLASS SURFACE LENGTH (mi) <null> <null> 151304 City of Redmond City Collector AC <null> <null> <null> 151309 City of Redmond City Local AC <null> <null> <null> 151304 City of Redmond City Collector Macadam, Oil <null> Mat <null> <null> 141333 City of Redmond Rural -
Planetary Protection Issues in the Human Exploration of Mars Final Report May 9, 2005
NASA/CP—2005-213461 Planetary Protection Issues in the Human Exploration of Mars Final Report May 9, 2005 Editors: M. E. Criswell M. S. Race J. D. Rummel A. Baker Report of a Workshop held June 20-23, 2001 at Pingree Park Mountain Campus Colorado State University Fort Collins, Colorado Workshop sponsored by NASA Ames Research Center Moffett Field, CA 94035 June 2005 The NASA STI Program Office . in Profile Since its founding, NASA has been dedicated to the • CONFERENCE PUBLICATION. Collected advancement of aeronautics and space science. The papers from scientific and technical confer- NASA Scientific and Technical Information (STI) ences, symposia, seminars, or other meetings Program Office plays a key part in helping NASA sponsored or cosponsored by NASA. maintain this important role. • SPECIAL PUBLICATION. Scientific, technical, The NASA STI Program Office is operated by or historical information from NASA programs, Langley Research Center, the Lead Center for projects, and missions, often concerned with NASA’s scientific and technical information. The subjects having substantial public interest. NASA STI Program Office provides access to the NASA STI Database, the largest collection of • TECHNICAL TRANSLATION. English- aeronautical and space science STI in the world. language translations of foreign scientific and The Program Office is also NASA’s institutional technical material pertinent to NASA’s mission. mechanism for disseminating the results of its research and development activities. These results Specialized services that complement the STI are published by NASA in the NASA STI Report Program Office’s diverse offerings include creating Series, which includes the following report types: custom thesauri, building customized databases, organizing and publishing research results . -
Summary of Sexual Abuse Claims in Chapter 11 Cases of Boy Scouts of America
Summary of Sexual Abuse Claims in Chapter 11 Cases of Boy Scouts of America There are approximately 101,135sexual abuse claims filed. Of those claims, the Tort Claimants’ Committee estimates that there are approximately 83,807 unique claims if the amended and superseded and multiple claims filed on account of the same survivor are removed. The summary of sexual abuse claims below uses the set of 83,807 of claim for purposes of claims summary below.1 The Tort Claimants’ Committee has broken down the sexual abuse claims in various categories for the purpose of disclosing where and when the sexual abuse claims arose and the identity of certain of the parties that are implicated in the alleged sexual abuse. Attached hereto as Exhibit 1 is a chart that shows the sexual abuse claims broken down by the year in which they first arose. Please note that there approximately 10,500 claims did not provide a date for when the sexual abuse occurred. As a result, those claims have not been assigned a year in which the abuse first arose. Attached hereto as Exhibit 2 is a chart that shows the claims broken down by the state or jurisdiction in which they arose. Please note there are approximately 7,186 claims that did not provide a location of abuse. Those claims are reflected by YY or ZZ in the codes used to identify the applicable state or jurisdiction. Those claims have not been assigned a state or other jurisdiction. Attached hereto as Exhibit 3 is a chart that shows the claims broken down by the Local Council implicated in the sexual abuse. -
Workshop on Lunar Crater Observing and Sensing Satellite (LCROSS) Site Selection, P
WORKSHOP PROGRAM AND ABSTRACTS LPI Contribution No. 1327 WWWOOORRRKKKSSSHHHOOOPPP OOONNN LLLUUUNNNAAARRR CCCRRRAAATTTEEERRR OOOBBBSSSEEERRRVVVIIINNNGGG AAANNNDDD SSSEEENNNSSSIIINNNGGG SSSAAATTTEEELLLLLLIIITTTEEE (((LLLCCCRRROOOSSSSSS))) SSSIIITTTEEE SSSEEELLLEEECCCTTTIIIOOONNN OOOCCCTTTOOOBBBEEERRR 111666,,, 222000000666 NNNAAASSSAAA AAAMMMEEESSS RRREEESSSEEEAAARRRCCCHHH CCCEEENNNTTTEEERRR MMMOOOFFFFFFEEETTTTTT FFFIIIEEELLLDDD,,, CCCAAALLLIIIFFFOOORRRNNNIIIAAA SSSPPPOOONNNSSSOOORRRSSS LCROSS Mission Project NASA Ames Research Center Lunar and Planetary Institute National Aeronautics and Space Administration SSSCCCIIIEEENNNTTTIIIFFFIIICCC OOORRRGGGAAANNNIIIZZZIIINNNGGG CCCOOOMMMMMMIIITTTTTTEEEEEE Jennifer Heldmann (chair) NASA Ames Research Center/SETI Institute Geoff Briggs NASA Ames Research Center Tony Colaprete NASA Ames Research Center Don Korycansky University of California, Santa Cruz Pete Schultz Brown University Lunar and Planetary Institute 3600 Bay Area Boulevard Houston TX 77058-1113 LPI Contribution No. 1327 Compiled in 2006 by LUNAR AND PLANETARY INSTITUTE The Institute is operated by the Universities Space Research Association under Agreement No. NCC5-679 issued through the Solar System Exploration Division of the National Aeronautics and Space Administration. Any opinions, findings, and conclusions or recommendations expressed in this volume are those of the author(s) and do not necessarily reflect the views of the National Aeronautics and Space Administration. Material in this volume may be copied without restraint for