120 research outputs found

    NASA 2018 Green Propulsion Roadmap

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    The Green Propulsion Working Group (GPWG) is a technical guidance working group formed April 2017 under the Agency's Capability Leadership Team The GPWG was tasked with recommending an agency road map and providing guidance to NASA on green propulsion technology development and infusion The GPWG's efforts focus on ionic liquid propellants and related technologies The GPWG was chartered with three representatives from NASA Centers currently exploring green propulsion technologies As other Centers may explore programs that utilize green propulsion, membership of the working group can be expanded to include more interested parties Working group also solicits and coordinates with other government agencies (e.g. AFRL, MDA) In 2015, JANNAF hosted a Technical Interchange Meeting (TIM) on Green Monopropellant Alternatives to Hydrazine (GMAH) Included both Government and non-Government contributions on the State-of-the-Art in Green Propulsion Technology Following the TIM, a Government-only session (USAF/AFRL/NASA/MDA/DLA) reviewed and identified remaining technical gaps in Green Propulsion In 2016, an inter-agency team (AFRL/NASA/MDA) worked together to develop an informal inter-agency "roadmap" based on the outcome of the TIM Approach consisted of near-term, mid-term, and long-term technology advancement areas, approaching incrementally larger thrust classes The NASA Green Propulsion Working Group reviewed the work of the 2016 Inter-Agency Working Group, and concurs that the identified technical gaps and technology development areas are still relevant and necessary to see green propulsion technology advanced The GPWG recommends the 2016 roadmap be adopted as baseline for NASA needs, with some additions The focus of the 2016 inter-agency roadmap was primarily on the thruster technology. The Agency must also invest in understanding the broader propulsion system-level technology gaps in parallel. Timeframes are considered suggested from a priority standpoint, but are also flexible as some efforts will need to occur in the nearer term or concurrently in order to meet specific mission requirements The GPWG developed 2018 roadmap breaks down the technology development goals into Technology Development Areas (TDA's), and identifies the near-, mid, and long-term sub-goals within those areas. Those TDA's are: Thruster Hardware Development Modeling & Tools Development Materials Properties and Compatibility Propellant Development

    Comparison of Attractiveness and Reaction of Melon Cultivars to the Striped Cucumber Beetle and Bacterial Wilt, 2015

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    This is a compilation of 21 research trial reports from four land-grant universities in the Midwestern United States. Crops include cantaloupe, pickling cucumber, pepper, potato, pumpkin, summer squash and zucchini, sweet corn, tomato, and watermelon. Somecrops were evaluated in high tunnels or hoophouses. Most trials evaluated different cultivars or varieties. One report addressed plant spacing for sweet corn and one addressed soil block for production of tomato seedlings. A list of vegetable seed sources and a list of other online sources of vegetable trial reports are also included

    Nitrogen Release and Disease Suppressive Activity of Four Compost Amendments on Three Vegetable Farms

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    This is a compilation of 30 research trial reports from four land-grant universities in the Midwestern United States. Crops include cantaloupe, pickling cucumber, pepper, potato, pumpkin, summer squash and zucchini, sweet corn, tomato, and watermelon. Somecrops were evaluated in high tunnels or hoophouses. Most trials evaluated different cultivars or varieties. One report addressed plant spacing for sweet corn and one addressed soil block for production of tomato seedlings. A list of vegetable seed sources and a list of other online sources of vegetable trial reports are also included

    Mortality Risk Associated with Short-Term Exposure to Traffic Particles and Sulfates

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    BACKGROUND: Many studies have shown that airborne particles are associated with increased risk of death, but attention has more recently focused on the differential toxicity of particles from different sources. Geographic information system (GIS) approaches have recently been used to improve exposure assessment, particularly for traffic particles, but only for long-term exposure. OBJECTIVES: We analyzed approximately 100,000 deaths from all, cardiovascular, and respiratory causes for the years 1995–2002 using a case–crossover analysis. METHODS: Estimates of exposure to traffic particles were geocoded to the address of each decedent on the day before death and control days, with these estimates derived from a GIS-based exposure model incorporating deterministic covariates, such as traffic density and meteorologic factors, and a smooth function of latitude and longitude. RESULTS: We estimate that an IQR increase in traffic particle exposure on the day before death is associated with a 2.3% increase [95% confidence interval (CI), 1.2 to 3.4%] in all-cause mortality risk. Stroke deaths were particularly elevated (4.4%; 95% CI, −0.2 to 9.3%), as were diabetes deaths (5.7%; 95% CI, −1.7 to 13.7%). Sulfate particles are spatially homogeneous, and using a central monitor, we found that an IQR increase in sulfate levels on the day before death is associated with a 1.1% (95% CI, 0.1 to 2.0%) increase in all-cause mortality risk. CONCLUSIONS: Both traffic and powerplant particles are associated with increased deaths in Boston, with larger effects for traffic particles

    The Grizzly, October 5, 1999

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    Bears Clobber Swarthmore During Family Day Game • Family Day A Success • Admission Rumor Proves False • Sophomore Week Set • 811 Main Street • Forget MTV: Career Services Offering UC Seniors Opportunity to Star in Real World • Opinion: Stereotypes on Campus Affect and Hurt Everyone; Letter to the Editors • Ursinus Football Crushes Swarthmore in Centennial Conference Action, 59-0 • Volleyball wins Allentown Invit. and Family Day Tourney • Monumental Changes in UC Cheerleading • Soccer Splits for 1-1 on the Weekhttps://digitalcommons.ursinus.edu/grizzlynews/1447/thumbnail.jp

    The Grizzly, November 9, 1999

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    Could Ursinus be a Target for Thieves? • Sexual Harassment at Ursinus College • John Street Elected New Mayor of Philadelphia • A Makeover for Ursinus Art on Campus • Egypt Air Flight 990 Disaster • BPS: True Student Living • Grizzly Greeks Rush to Greet New Members • Letter to the Editor: Disrespect of Women on the Ursinus Campus; Ursinus Students Fall Victim to False Sense of Security • Response: Racism • UC Baseball Players Receive Defensive Honors for 1999 Season • Football Stretches Streak to Six, Looks to Dickinson for 7 • Men\u27s Soccer Takes Tough Loss • F&M and Gettysburg in NCAA Tourneyhttps://digitalcommons.ursinus.edu/grizzlynews/1451/thumbnail.jp

    The Grizzly, October 12, 1999

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    Homecoming \u2799: Any Questions? • One America • Ursinus Grads Leave with a Diploma and a Low Financial Debt • Students Celebrate Berman Museum\u27s 10th Anniversary • Old Men\u27s at Heart of Ursinus • Opinion: Lott\u27s Lack of Responsibility is a Major Threat to the Security of the World; The Destruction of Chechnya, NATO\u27s Bloody Legacy • WVOU Offers Promising Shows That Could Even Provide Thought • Jeffrey Gaines Jams Again at UC • Field Hockey Downed in Fairfield • Bears Senior Cornerback Dealt Leg Injury; Looks to Return • UC Tackles Johns Hopkins 20-18 • Volleyball Splits Home Matcheshttps://digitalcommons.ursinus.edu/grizzlynews/1448/thumbnail.jp

    The Grizzly, November 16, 1999

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    Changes for Ursinus Campus? • UC Student Sexually Assaulted • A Case of Race? • Fire Safety on Ursinus Campus • Enjoying The Perks • Main Street House Stakes its Claim • Abstract Art Breathes Life into UC Campus • Opinion: Letter to the Editor; Editorial Discretion Does not Equal Censorship; Seniors Speak Out; The Key to the Issue of Race is Fellowship; In Response to the White Agenda • Voices in Praise Does it Again: Second Annual Gospel Choir Event a Success • Bears Head to Playoffs After Dickson Win • Volleyball Goes to ECAC\u27s • Ursinus Swimming Dives Into the Seasonhttps://digitalcommons.ursinus.edu/grizzlynews/1452/thumbnail.jp

    The Grizzly, September 28, 1999

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    Cheer on UC at Family Day! • Taking to the Ballots • Change in Ursinus Security: Good or Bad? • Family Day Has Arrived • Living Off Campus Just Like Home • Campus Unable to Check Messages on Voice Mail • Bon Appetite at Back Porch Cafe • Letter to the Editor: Censorship in the Grizzly • Editors\u27 Response to Censorship Allegations • Volleyball Continues its Winning Ways • A Weekend of Success in U.C. Field Hockey • Bears Football Suffers 1st Loss of Season to #1 W. Marylandhttps://digitalcommons.ursinus.edu/grizzlynews/1446/thumbnail.jp

    The Grizzly, September 14, 1999

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    Tragic Loss for Ursinus College • A Computer Makeover • Summer Research Experience • Freshman Orientation: Breaking in the Baby Bears • Car Owners Beware: Vehicle Cloning Criminals Multiplying to Collegeville Area • Ursinus Chapter of Best Buddies Begins Second Year • Life in Collegeville: Still Just a Rat in a Cage • Career Services Gets Connected • Opinion: Creationism is a Religious Doctrine, not a Viable Science ; What is and What Never Should be: The Rise and Fall of MTV\u27s Social Relevance • This is a Story of Obesity, Sexual Ambiguity, Self-Delusion and Madness • UC Gridders Grab First Win Over Leb Val • UC Field Hockey Under New Management • 80th Season of Bears Field Hockey Beginshttps://digitalcommons.ursinus.edu/grizzlynews/1444/thumbnail.jp
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