386 research outputs found
Smokejumper Magazine, April 2012
This issue of the National Smokejumper Association (NSA) Smokejumper Magazine contains the following articles: Evolution of Parachutes and Related Gear (Jeff R. Davis), Wasser Hangs Up His Parachute, Operation Bolo—Jumper Shoots Down MiG-21 (Historic), Feature on Ted Andersen, Features Carl Rosselli. Smokejumper Magazine continues Static Line, which was the original title of the NSA quarterly magazine.https://dc.ewu.edu/smokejumper_mag/1078/thumbnail.jp
Smokejumper Magazine, July 2001
This issue of the National Smokejumper Association (NSA) Smokejumper Magazine contains the following articles: Kickin’ Cargo/Bum Pilot (Jeff R. Davis), Log of Rookie Smokejumper (Herb Hidu), profiles Phil Stanley, Mike Kreidler, Doug Sutherland and Gregg Phifer, Smokejumper Thwarts Hijacking of Pam-Am Clipper 73 (Chuck Sheley), Anything for a Jump (Chuck Mansfield). Smokejumper Magazine continues Static Line, which was the original title of the NSA quarterly magazine.https://dc.ewu.edu/smokejumper_mag/1031/thumbnail.jp
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River Restoration to Achieve a Stage 0 Condition: Summary of a Workshop Held November 5-6, 2020
Restoration to achieve Stage 0 is a valley-scale, process-based (hydrologic, geologic and biological) approach that aims to reestablish stream depositional environments to maximize longitudinal, lateral, and vertical connectivity at base flows and facilitate development of dynamic, self-formed and self-sustaining wetland-stream complexes. The term Stage 0 originally described complex multi-channel conditions and wider floodplains that evidence suggests were common when Euro-Americans arrived. Stage 0 is one stage in a 9-stage stream channel evolution model. Stage 0 is now also more broadly used to describe stream restoration projects aimed at changing the current condition and future evolution of incised, single-channel streams to achieve those multi-channel and wider floodplain conditions.
The Stage 0 approach has generated excitement among restoration practitioners and researchers. It is seen as an action on a scale commensurate with past impacts; potentially capable of putting streams and their floodplains on a trajectory to recovery that is sustainable with minimal future intervention. Projects that reset the valley surface elevation may include the transfer of large amounts of sediment into incised channels from adjacent terraces using heavy machinery, and placement of logs and boulders to create structure across the resulting floodplain. Recreating expanded, complex and resilient stream and floodplain habitats over the longer term may involve considerable short-term disturbance of existing stream environments. Because some of these streams currently support sensitive populations of focal or endangered species (most notably salmonids) projects designed to achieve a Stage 0 condition have raised some questions and concerns among land managers and regulators charged with recovering those species. The approach is relatively new, so there are also questions regarding terminology, implementation and monitoring approaches, and appropriate sites and scale for these projects.
In this science and policy context, a Stage 0 Stream Restoration Workshop was held on November 5-6, 2020 with the goal to bring together practitioners, researchers, regulators and other stakeholders to discuss current topics and data gaps related to implementing and monitoring restoration projects intended to achieve a Stage 0 condition. The online workshop included expert presentations, questions and discussions during plenary sessions, and smaller breakout groups. This document summarizes the workshop proceedings
Integrated Testing Approaches for the NASA Ares I Crew Launch Vehicle
The Ares I crew launch vehicle is being developed by the U.S. National Aeronautics and Space Administration (NASA) to provide crew and cargo access to the International Space Station (ISS) and, together with the Ares V cargo launch vehicle, serves as a critical component of NASA's future human exploration of the Moon. During the preliminary design phase, NASA defined and began implementing plans for integrated ground and flight testing necessary to achieve the first human launch of Ares I. The individual Ares I flight hardware elements - including the first stage five segment booster (FSB), upper stage, and J-2X upper stage engine - will undergo extensive development, qualification, and certification testing prior to flight. Key integrated system tests include the upper stage Main Propulsion Test Article (MPTA), acceptance tests of the integrated upper stage and upper stage engine assembly, a full-scale integrated vehicle ground vibration test (IVGVT), aerodynamic testing to characterize vehicle performance, and integrated testing of the avionics and software components. The Ares I-X development flight test will provide flight data to validate engineering models for aerodynamic performance, stage separation, structural dynamic performance, and control system functionality. The Ares I-Y flight test will validate ascent performance of the first stage, stage separation functionality, validate the ability of the upper stage to manage cryogenic propellants to achieve upper stage engine start conditions, and a high-altitude demonstration of the launch abort system (LAS) following stage separation. The Orion 1 flight test will be conducted as a full, un-crewed, operational flight test through the entire ascent flight profile prior to the first crewed launch
State of Utah Space Environment & Contamination Study (SUSpECS) MISSE-6 Payload to Investigate Their Effects on Electron Emission and Resistivity of Spacecraft Materials
A study of the effects of prolonged exposure to the space environment and of charge-enhanced contamination on the electron emission and resistivity of spacecraft materials, the State of Utah Space Environment & Contamination Study (SUSpECS), is planned for flight aboard the MISSE-6 payload. The Materials International Space Station Experiment (MISSE-6) program is designed to characterize the performance of candidate new space materials over the course of approximately four to eight month exposure periods on-orbit on the International Space Station, with a target flight date of mid-2006. The study is conducted by the Utah State University Materials Physics Group, in cooperation with the USU Get-Away Special Program and ATK Thiokol. Electron emission and transport properties of materials are key in determining the likelihood of deleterious spacecraft charging effects and are essential parameters in modeling these effects with engineering tools like NASCAP-2K code. While preliminary ground-based studies have shown that contamination can lead to catastrophic charging effects under certain circumstances, little direct information is presently available on the effects of sample deterioration and contamination on emission properties for materials flown in space. Approximately 40 samples will be mounted on panels on both the ram and wake sides of the ISS. They have been carefully chosen to provide needed information for different ongoing studies and a broad cross-section of prototypical materials used on the exteriors of spacecrafts. Much of the pre-flight testing has already been done in conjunction with previous studies through the NASA Space Environments and Effects Program and other projects. The materials will be tested for resistivity and dielectric strength, and for electron-, ion-, and photon-induced electron emission yield curves and emission spectra. Characterization measurements include optical and electron microscopy, reflection spectroscopy, resistivity and Auger electron spectroscopy. In addition, studies of the service life of composite and ceramic materials of the ATK Thermal Protection Systems and Lightweight Structure System
SUSpECTS- State of Utah Space, Environment & Contamnation Study- MISSE VI
A Study of the effects of prolonged exposure to the space environment and of charge-enhanced contamination on the electron emission and resistivity of spacecraft materials, the State of Utah Space Environment & Contamination Study (SUSpECTS), is planned for flight aboard the MISSE-6 payload. the Materials International Space month exposure periods on-orbit on the International Space Station, with a target flight date of mid-2006. The study is conducted by the Utah State University Materials that contamination can lead to catastrophic charging effects under certain circumstances, little direct information is presently available on the effects of sample deterioration and on emission properties for materials flown in space.
Approximately 145 samples will be mounted on panels on both the ram and wake sides of the ISS. They have been carefully chosen to provide needed information for different ongoing studies and broad cross-section of prototypical materials used on the exteriors of spacecrafts. Characterization measurements include optical and electron microscopy, reflection spectroscopy, resistivity and Auger electron spectroscopy. In addition, studies of the service life of composite and ceramic materials of the ATK Thermal Protection Systems and Lightweight Structure Systems will evaluate chemical and mechanical properties as a function of depth from the AO and UV exposure surface. This poster will chronicle the design, construction, and assembly of the sample holders and also the characterization of each of the material samples
Doping-enhanced radiative efficiency enables lasing in unpassivated GaAs nanowires
Nanolasers hold promise for applications including integrated photonics, on-chip optical interconnects and optical sensing. Key to the realization of current cavity designs is the use of nanomaterials combining high gain with high radiative efficiency. Until now, efforts to enhance the performance of semiconductor nanomaterials have focused on reducing the rate of non-radiative recombination through improvements to material quality and complex passivation schemes. Here we employ controlled impurity doping to increase the rate of radiative recombination. This unique approach enables us to improve the radiative efficiency of unpassivated GaAs nanowires by a factor of several hundred times while also increasing differential gain and reducing the transparency carrier density. In this way, we demonstrate lasing from a nanomaterial that combines high radiative efficiency with a picosecond carrier lifetime ready for high speed applications
Prospectus, December 2, 1975
PC NEWS IN BRIEF: 1975 FALL SEMESTER GRADS, PRESIDENT REPORTS, TRAFFIC STUDY AT PARKLAND; Campus FM Radio A Reality; StuGo proposes ; editorials; Letters to the Editor; Roots & Radicals; Forum; Seniors visit P/C; Far Out Planet; Counseling Services Available at P/C; Questions, Just ask Bob; Karate Club; Phi Beta Lambda; Parkland, Sangamon combination; Library Report; Baby born to Reids; Distaff Side; Skylines: Secrets of Life; Parkland teacher stars in musical; Snow Queen contest, dance planned by StuGo; Wright accepts new Chevy; Christmas Music; Swingles Swing; Aw, c\u27mon, Denice; Public StuGo Meeting set for Dec. 6; Cardwell reports to Faculty Senate; Library Security System; Senator Resigns; Parkland Events; Dinner set for December 4; Staerkel scores lack of state funding; If Snow comes, can flu be far behind?; Library Hours; Prospectus Photo Contest; Attend StuGo Meeting: Students protest further cuts in StuGo budget; Ooops!; Two Plays set for Dec. 4 and &; Fly Navy; Snow Queen Candidates named; Good News; Vinyl Love; Foto-Funny\u27s; Country Bouquet: Chicano country ; Dear Bonnie; Art Works for P/C; Classified; U.S. returns vs. Illini; Cobras host Wabash in season opener; Sports Views: Parkland football may be in danger; 1975-76 Cobras Parkland Basketball Roster; 1975-1976 Parkland College Basketball Schedulehttps://spark.parkland.edu/prospectus_1975/1001/thumbnail.jp
The Vehicle, 1973
Vol. 15, No. 1
Table of Contents
Hail to the Cheeks of MenNancy Broom Brownpage 1
Sister Eleanor\u27s Gray FriendsGina Morganpage 2
The Typing TeacherAnne Hubbardpage 3
Pensive AgainPeter McCullarpage 7
The Defense ManKathryn Majorpage 9
Wedding PreparationKathryn R. Leesmanpage 10
Reflections on BathingChris Benignuspage 14
Home: Bed of DustHelen Matternpage 14
One TimeChris Benignuspage 15
CombineRuth Ann Meyerpage 16
Park SitterEric H. Synderpage 17
The Sole TortoiseDennis Kroftpage 18
Blind SocietyMike Cordtspage 19
Black DreamPeter McCullarpage 21
The Poetry ReadingRay Schmuddepage 22
The FuneralMarsha Halfordpage 23
She and HerRosanne Davispage 24
The Cane Pole LungfishJeff Kayserpage 26
Du, stille WeltMary Bassettpage 27
ComradesNancy Broom Brownpage 29
Photography and Art Credits
Dann Girecover, page 18
Mark McKinneypage 2, 17, 25
John Gravespage 8
Sally Brotherspage 13
Normal Le Clercqpage 28
Wm. Murawskipage 30https://thekeep.eiu.edu/vehicle/1029/thumbnail.jp
Autonomous global sky surveillance with real-time robotic follow-up: Night Sky Awareness through Thinking Telescopes Technology
Abstract We discuss the development of prototypes for a global grid of advanced "thinking" sky sentinels and robotic followup telescopes that observe the full night sky to provide real-time monitoring of the night sky by autonomously recognizing anomalous behavior, selecting targets for detailed investigation, and making real-time, follow-up observations. The layered, fault-tolerant, network uses relatively inexpensive robotic EO sensors to provide persistent autonomous monitoring and real-time anomaly detection to enable rapid recognition and a swift response to transients as they emerge. This T3 global EO grid avoids the limitations imposed by geography and weather to provide persistent monitoring of the night sky
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