215 research outputs found

    Radar sounder evidence of thick, porous sediments in Meridiani Planum and implications for ice‐filled deposits on Mars

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    Meridiani Planum is one of the most intensely studied regions on Mars, yet little is known about the physical properties of the deposits below those examined by the Opportunity rover. We report the detection of subsurface echoes within the Meridiani Planum deposits from data obtained by the Mars Advanced Radar for Subsurface and Ionospheric Sounding (MARSIS) instrument. The delay time between the surface and subsurface returns is indicative of materials with a real dielectric constant of 3.6 ± 0.6. The real dielectric constant is strongly modulated by bulk density. Newly derived compaction relationships for Mars indicate that the relatively low dielectric constant of the Meridiani Planum deposits is consistent with a thick layer of ice‐free, porous, basaltic sand. The unique physiographic and hydrologic setting of Meridiani Planum may have provided an ideal sediment trap for eolian sands. The relatively low gravity and the cold, dry climate that has dominated Mars for billions of years may have allowed thick eolian sand deposits to remain porous and only weakly indurated. Minimally compacted sedimentary deposits may offer a possible explanation for other nonpolar region units with low apparent bulk dielectric constants

    The Grizzly, February 13, 2003

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    Iraqi Speaker Describes his Country as a Prison of Suffering • Ursinus Student Heroes 30 Years Ago • To Fight or not to Fight: You May not Have the Option • Opinions: Skiing Fun Close to Home; Lonely this Valentine\u27s Day? • Female Pride, Guerrilla Warfare • First of Pew Fellows Speaks • Francis Moore Lappe to Visit Ursinus on February 19th • Ursinus Swimmers Look Towards Champions Meet • Men\u27s Basketball Dominate Centennial Conference • Track Handling Business Indoors • Women\u27s Basketball Can\u27t Find the Right Touchhttps://digitalcommons.ursinus.edu/grizzlynews/1529/thumbnail.jp

    Mapping Shallow Coastal Ecosystems: A Case Study of a Rhode Island Lagoon

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    In order to effectively study, manage, conserve, and sustain shallow-subtidal ecosystems, a spatial inventory of the basic resources and habitats is essential. Because of the complexities of shallow-subtidal substrates, benthic communities, geology, geomorphology, and water column attributes, few standard protocols are fully articulated and tested that describe the mapping and inventory processes and accompanying interpretations. In this paper, we describe a systematic approach to map Rhode Island’s shallow-subtidal coastal lagoon ecosystems, by using, integrating, and reconciling multiple data sets to identify the geology, soils, biological communities, and environments that, collectively, define each shallow-subtidal habitat. We constructed maps for these lagoons via a deliberate, step by step approach. Acoustics and geostatistical modeling were used to create a bathymetric map. These data were analyzed to identify submerged landforms and geologic boundaries. Geologic interpretations were verified with video and grab samples. Soils were sampled, characterized, and mapped within the context of the landscape and geologic boundaries. Biological components and distributions were investigated using acoustics, grab samples, video, and sediment profile images. Data sets were cross-referenced and ground-truthed to test for inconsistencies. Maps and geospatial data, with Federal Geographic Data Committee (FGDC)-compliant metadata, were finalized after reconciling data set inconsistencies and made available on the Internet. These data allow for classification in the revised Coastal and Marine Ecological Classification Standard (CMECS). With these maps, we explored potential relationships among and between physical and biological parameters. In some cases, we discovered a clear match between habitat measures; in others, however, relationships were more difficult to distinguish and require further investigation

    The Grizzly, November 8, 2001

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    Construction on Campus Continues as Scheduled • UC Leadership Scholars Attend Annual Halloween Concert • An Evening with Alice Parker a Musical Success • Peace Corps and City Year Representatives Speak About Careers in Common Good • Anthrax Vaccine at Center of Controversy • Opinions: Closed Courses and Wait Lists: Nightmares of Registration; Pop Goes the Quiz! • Gospel Choir Sings out for Peace, Prayer and Healing; Concert a Great Success • Judy Chicago is Coming! World-famous Artist to Visit Ursinus • Influenza Season is Upon Us • Comparative Prices on Museums • Self Protection Facts: What You Need to Know • Power of Dance • Rushing Season Begins Again • Gettysburg Becomes New CC Men\u27s Soccer Champion • UC Women\u27s Rugby Fighting the Good Fight • NCAA Volleyball Semi-finals • UC Downs FDUhttps://digitalcommons.ursinus.edu/grizzlynews/1500/thumbnail.jp

    The Grizzly, October 4, 2001

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    Campus-Wide Coin Drive Raises over $1,500 for Red Cross Fund • Tri Sigma Colony Established on the Ursinus Campus • Sisters of Omega Chi Organize Campus Blood Drive • Banned Book Week at UC • American Studies Major Offers Students Interdisciplinary Study • Ursinus Students Excited about Grand Opening of Local Kohls Department Store • Opinions: Exploring the Difference in Communication Between Men and Women; Student Response to Facilities in New Fitness Center; CAB Talks Back: Use it; Don\u27t Reduce it; Feeling Awkward in New Gym; Crossing and Construction Complaints on Main Street • Ghouls, Ghosts, Thrills and Chills: Area Amusement Parks Celebrate Halloween in Spooky Style • Author Lorene Cary Launches the Pew Fellow Lecture Series • Poem-palooza set to Arrive at Ursinus • Oktoberfest and Then Some • Polignano puts a new Spin on Fitness • Club Drugs: What you may not Know • Comparing Prices on Film Development • The Roaring Twenties? Perhaps not at Ursinus • Women\u27s Soccer Annihilates Washington, Shutout by Hopkins • UC Cross Country at Dickinson Invitational: Did They Just run out of Juice? • West Chester Wins Snell Cup Against UC Field Hockey, 4-1 • Volleyball Defeats Washington, but Falls to Haverford and Gettysburg • Men\u27s Soccer Takes out Washington • UC Women\u27s Rugby Kicks off Fall Seasonhttps://digitalcommons.ursinus.edu/grizzlynews/1496/thumbnail.jp

    The Grizzly, October 25, 2001

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    Food and Fun at Family Day 2001 • UC Field Hockey Players React to Move from Division I to Division III • Phi Psi Promotes Breast Cancer Awareness Month with Pink Ribbon Fundraiser • Fall Fun and Friendship with UC Best Buddies • Truth About Dr. Fritz • Gay Straight Alliance Walks for AIDS Fund • First Year Student Coordinator Ed Gildea Helps Students Work to their Fullest Potential • Take Advantage of the Upcoming Internship Fair • Students Learn the Truth about Drinking • Opinions: Athletic Scholarships at Ursinus; Listen up Insurance Companies: Give me my Birth Control! • Stunned in Awe: It\u27s all in the Name • Birth Control Basics • Bears Take Down Wooster • UC Field Hockey Takes on The Capital • Bears Volleyball Falls into a Slump after Beating DeSales • Women\u27s Soccer Builds up Momentum to Beat Villa Julie • Veteran\u27s Day for UC Men\u27s Soccer • Penderghest and Dougherty Run to Bear Pack Victory! • Splish, Splash, UC is Back in a Flash • Outlook for 2002 Lacrosse • Ursinus Cheerleadinghttps://digitalcommons.ursinus.edu/grizzlynews/1498/thumbnail.jp

    The Grizzly, December 6, 2001

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    UC Students: Dancin\u27 The Night Away • Celebrating the Holidays Around the World • Pomenti Wins World History Association / Phi Alpha Theta Essay Competition • US Economy Faces Economic Recession • Campus Residence Halls Compete in a Holiday Decorating Contest • Opinions: Wismer\u27s Fantastic Harvest Moon Festival; Lancaster not Just for the Amish • Final Exam Schedule • Christmas Price Comparison: Lights, Cards and Wrapping Paper • How to Make Your Own Christmas Gifts • \u27Twas the Night Before Finals • Fun Activities in Philly • UC Swim Teams Maintain Winning Streak Over Arcadia and Goucher • Women\u27s Hoops Knock Off the Devils • Bears Finally Find First Victory • UC Track & Field Indoor Once More at Dickinson Holiday Meet • Wrestlers Finish 6th at Petrofes Invitationalhttps://digitalcommons.ursinus.edu/grizzlynews/1503/thumbnail.jp

    The Grizzly, November 29, 2001

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    UC Blueskies Calls for Help with Recycling • AIDS Legacy Continues in Poor Countries • Economics and Business Administration Panel Discussion Offers Students Advice on Finding Job Connections • Volunteers Wanted for NBA League Jam Session • UC Group Makes Plans for Alternative Spring Break • New California Law Enables Women to Obtain Emergency Contraceptive Pills without a Prescription • Opinions: So This is Christmas?; Family Bonding is Better than Trip to Spain; Letter of Apology • Messiah to Hit the Stage • Jazz Ensemble Keeps it Swinging • Comparative Pricing: Local Gasoline • Dougherty Finishes 123rd at Nationals • 8+6+9 = Success for UC Wrestling Team • Lady Bears Knocked off by Susquehanna • Duncan Selected as a Finalist for the Gagliardi Trophy • Captains Leading the Way to Victory for Bears Swimming • Bears Basketball Still Looking for First Winhttps://digitalcommons.ursinus.edu/grizzlynews/1502/thumbnail.jp
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