Gateway Modeling and Simulation Plan

This plan institutes direction across the Gateway Program and the Element Projects to ensure that Cross Program M&S are produced in a manner that (1) generate the artifacts required for NASA-STD-7009 compliance, (2) ensures interoperability of M&S exchanged and integrated across the program and, (3) drives integrated development efforts to provide cross-domain integrated simulation of the Gateway elements, space environment, and operational scenarios. This direction is flowed down via contractual enforcement to prime contractors and includes both the GMS requirements specified in this plan and the NASASTD- 7009 derived requirements necessary for compliance. Grounding principles for management of Gateway Models and Simulations (M&S) are derived from the Columbia Accident Investigation Board (CAIB) report and the Diaz team report, A Renewed Commitment to Excellence. As an outcome of these reports, and in response to Action 4 of the Diaz team report, the NASA Standard for Models and Simulations, NASA-STD-7009 was developed. The standard establishes M&S requirements for development and use activities to ensure proper capture and communication of M&S pedigree and credibility information to Gateway program decision makers. Through the course of the Gateway program life cycle M&S will be heavily relied upon to conduct analysis, test products, support operations activities, enable informed decision making and ultimately to certify the Gateway with an acceptable level of risk to crew and mission. To reduce risk associated with M&S influenced decisions, this plan applies the NASA-STD-7009 requirements to produce the artifacts that support credibility assessments and ensure the information is communicated to program management

Session B6- Installation of Denil fishways and eel ladders at brownfield sites

EA Engineering, Science, and Technology, Inc., the U.S. Department of Agriculture Natural Resources Conservation Service, and the Woonasquatucket River Watershed Council have successfully designed, permitted, and constructed Denil fishways and eel ladders at the Rising Sun Mills and Atlantic Mills Dams, the first and third dams on the Woonasquatucket River, a federally designated American Heritage River. The Woonasquatucket River has a number of low head dams from former industrial uses that prevent passage of diadromous fish. The fish ways at these two dams, combined with the two dam removals at Paragon Mills and Dyerville Dams, thesecond and fourth dams, opened over linear miles and 150 acres of habitat to diadromous fish, including American shad, blueback herring, alewife, and American eel. Providing fish passage at these two urban river settings presented numerous engineering and permitting challenges to address historical and archaeological considerations, contaminated sediment management, and state and federal regulatory requirements. Rising Sun Mills Dam and Atlantic Mills Dam are located adjacent to capped Brownfield sites, and the Denil fishways had to be designed to maintain the integrity of the Brownfield caps. Both fish ways required modifications to the existing dam structures after installation of cofferdams to address unknown conditions. The Rising Sun Mills fish way required modification to the deteriorated timber gate for the fishway exit channel and stabilization of the timber spillwayapron for construction of the fishway entrance. The spillwayabutment at Atlantic Mills Dam was found unstable and had to be replaced with a new concrete abutment between the spillway and the fishway exit channel. Both projects included design and installation of eel fish ways subsequent to completion of the Denil fishways. Solar panels were used to operate the attraction water pumps since there were no nearby power sources

Southern Cascadia Episodic Slow Earthquakes

Continuous GPS and seismic data from northern California show that slow earthquakes periodically rupture the Gorda-North America plate interface within southern Cascadia. On average, these creep events have occurred every 10.9±1.2 months since at least 1998. Appearing as week-long GPS extensional transients that reverse secular forearc contraction, the data show a recurrence interval 22% shorter than slow events recognized to the north. Seismic tremor here accompanies the GPS reversals, correlated across as many as 5 northern California seismometers. Tremor occurs sporadically throughout the year, but increases in duration and intensity by a factor of about 10 simultaneous with the GPS reversals. Beneath west-central Oregon, three reversals are also apparent, but more stations are needed to confirm sporadic slip on the plate interface here. Together, these measurements suggest that slow earthquakes likely occur throughout the Cascadia subduction zone and add further evidence for the role of fault-fluid migration in controlling transient slow-slip events here

Effectiveness of TED Stockings on Circulation and Blood Clotting

Circulatory issues can stem from many disease that cause blood clots specifically in the legs, adding compression is known to help reduce blood clotting. The goal of this research project is to better understand the purpose and effectiveness of TED stocking on circulation and blood clotting and whether it is still an effective practice. The outcome of this research project is to improve our practice through the use of TED stockings for circulation and blood clotting

Southern Cascadia episodic slow earthquakes

Continuous GPS and seismic data from northern California show that slow earthquakes periodically rupture the Gorda‐North America plate interface within southern Cascadia. On average, these creep events have occurred every 10.9 ± 1.2 months since at least 1998. Appearing as week‐long GPS extensional transients that reverse secular forearc contraction, the data show a recurrence interval 22% shorter than slow events recognized to the north. Seismic tremor here accompanies the GPS reversals, correlated across as many as 5 northern California seismometers. Tremor occurs sporadically throughout the year, but increases in duration and intensity by a factor of about 10 simultaneous with the GPS reversals. Beneath west‐central Oregon, three reversals are also apparent, but more stations are needed to confirm sporadic slip on the plate interface here. Together, these measurements suggest that slow earthquakes likely occur throughout the Cascadia subduction zone and add further evidence for the role of fault‐fluid migration in controlling transient slow‐slip events here

From Dawn to Desk: Finding the Sparkle in Everyday Reference Practice

Poster Presentation at NCLA oct 2019Have you seen a decline in reference questions at your service desk? Are staff skeptical about the desk’s value? The Research & Instructional Services team at East Carolina University noticed a drop in the number of questions being asked at our research desk, particularly in reference questions. Anecdotally, the questions didn’t seem as challenging as they once were, and we weren’t convinced the desk was “worth it.� Of course, anecdotes ≠ data! We opted to study our desk and phone transactions to better understand the questions asked and whether our existing staffing model aligned with the evidence. During two weeks in the fall and spring semesters, we collected the questions, answers, degree of teaching involved, how challenging we found the question, and time involved. We coded responses for difficulty using the READ scale and by content of the question to better understand what patrons were asking us. The results gave us new insight into this traditional service offering, particularly in the wake of a new student center next door to the library. This poster will present study findings, how we’ve changed our staffing model, and what we’ve done to refresh and renew our reference practice at the desk

Effect of Target Location on Dynamic Visual Acuity During Passive Horizontal Rotation

The vestibulo-ocular reflex (VOR) generates eye rotation to compensate for potential retinal slip in the specific plane of head movement. Dynamic visual acuity (DVA) has been utilized as a functional measure of the VOR. The purpose of this study was to examine changes in accuracy and reaction time when performing a DVA task with targets offset from the plane of rotation, e.g. offset vertically during horizontal rotation. Visual acuity was measured in 12 healthy subjects as they moved a hand-held joystick to indicate the orientation of a computer-generated Landolt C "as quickly and accurately as possible." Acuity thresholds were established with optotypes presented centrally on a wall-mounted LCD screen at 1.3 m distance, first without motion (static condition) and then while oscillating at 0.8 Hz (DVA, peak velocity 60 deg/s). The effect of target location was then measured during horizontal rotation with the optotypes randomly presented in one of nine different locations on the screen (offset up to 10 deg). The optotype size (logMar 0, 0.2 or 0.4, corresponding to Snellen range 20/20 to 20/50) and presentation duration (150, 300 and 450 ms) were counter-balanced across five trials, each utilizing horizontal rotation at 0.8 Hz. Dynamic acuity was reduced relative to static acuity in 7 of 12 subjects by one step size. During the random target trials, both accuracy and reaction time improved proportional to optotype size. Accuracy and reaction time also improved between 150 ms and 300 ms presentation durations. The main finding was that both accuracy and reaction time varied as a function of target location, with greater performance decrements when acquiring vertical targets. We conclude that dynamic visual acuity varies with target location, with acuity optimized for targets in the plane of motion. Both reaction time and accuracy are functionally relevant DVA parameters of VOR function