1,745 research outputs found
The RTA Betatron-Node Experiment: Limiting Cumulative BBU Growth In A Linear Periodic System
The successful operation of a Two-Beam accelerator based on extended
relativistic klystrons hinges upon decreasing the cumulative dipole BBU growth
from an exponential to a more manageable linear growth rate. We describe the
theoretical scheme to achieve this, and a new experiment to test this concept.
The experiment utilizes a 1-MeV, 600-Amp, 200-ns electron beam and a short
beamline of periodically-spaced rf dipole-mode pillbox cavities and solenoid
magnets for transport. Descriptions of the beamline are presented, followed by
theoretical studies of the beam transport and dipole-mode growth.Comment: 3 pages, 3 figures. Submitted to XX Int'l. LINAC Conferenc
Improving Care and Outcomes for the Late Preterm Infant
Abstract The late preterm infant population is the fastest growing and largest segment of preterm infants delivered on a global level. Neonatal Intensive Care Unit transfer and Pediatric unit re-admission rates were examined at a regional medical center in the context of providing an evidence-based practice guideline designed specifically for this cohort of newborns. Prior to instituting the Association of Women\u27s Heath, Obstetric, and Neonatal Nurses Assessment and care of the late preterm infant: Evidence-based clinical practice guideline at a regional medical center, NICU transfer and Pediatric re-admission rates were retrospectively examined. After instituting the guideline for a six-month period, the rates were re-examined for comparison. The results included a significant decrease in Pediatric re-admissions and a slight increase in NICU transfers. These findings suggest a specialized pathway and increased surveillance may reduce costly preventable rehospitalization
OAO-2 observations of beta Lyrae and a provisional interpretation
Six-color ultraviolet photoelectric observations of beta Lyrae obtained with OAO-2 are presented. These observations, made at 1380, 1500, 1920, 2460, 2980 and 3330 A, represent the first truly continual coverage of the light changes of beta Lyrae during one orbital revolution and were obtained in November 1970. The photometric data are supplemented by spectral scans in the wavelength intervals 3800-1800 A and 2000-1050 A; the latter interval was scanned at 10 A resolution once during every OAO-2 orbit, i.e., about 100 minutes. Anomalous features, such as asymmetries and short and long term variations, are present in the light curves. A tentative discussion of solutions of the light curves is given
Pilot Data: Are Vertical and Lateral Hop Tests Appropriate for Patients Post-Ankle Fracture?
Ankle fractures effect 5 out of 10,000 individuals (van Staa, 2001). A recent study shows rapid functional gains over the first 6 months after an ankle fracture, but there are little or no gains 18-24 months into the recovery cycle (Beckenkamp, 2014). Similarly, other studies have shown that ankle fracture patients are categorized as having good recovery outcomes on popular measures such as the modified Olerud Molander scale (Egol, 2006), yet are unable to return to previous level of sport (Hong, 2013), indicating there may be persisting higher level performance deficits. This brings up the issue of whether there are performance based tests that would be appropriate for ankle fracture patients to determine return to sport or higher level activity without risk of injury. The purpose of this project is to determine the biomechanical load and side to side comparisons of vertical and lateral hopping tests that may be used in ankle fracture patients
Detection of sulphur in the galactic center
A strong detection at the (SIII) 18.71 micron line is reported for the Galactic Center region, Sgr A West. A line flux of 1.7 + or - 0.2x10 to the -17th power W cm(-2) is found for a 20-arc second beam-size measurement centered on IRS 1. A preliminary analysis indicates that the SIII abundance relative to hydrogen is consistent with the cosmic abundance of sulfur, 1.6x10 to the -5th power, if a filling factor of unity within the known clumps is assumed. However, the sulfur abundance in the Galactic Center may be as much as a factor of 3 overabundant if a filling factor of 0.03 is adopted, a value found to hold for some galactic HII regions
The mission oriented terminal area simulation facility
The Mission Oriented Terminal Area Simulation (MOTAS) was developed to provide an ATC environment in which flight management and flight operations research studies can be conducted with a high degree of realism. This facility provides a flexible and comprehensive simulation of the airborne, ground-based and communication aspects of the airport terminal area environment. Major elements of the simulation are: an airport terminal area environment model, two air traffic controller stations, several aircraft models and simulator cockpits, four pseudo pilot stations, and a realistic air-ground communications network. MOTAS has been used for one study with the DC-9 simulator and a series of data link studies are planned in the near future
- …