7,741 research outputs found
A study for development of aerothermodynamic test model materials and fabrication technique
A literature survey, materials reformulation and tailoring, fabrication problems, and materials selection and evaluation for fabricating models to be used with the phase-change technique for obtaining quantitative aerodynamic heat transfer data are presented. The study resulted in the selection of two best materials, stycast 2762 FT, and an alumina ceramic. Characteristics of these materials and detailed fabrication methods are presented
Low altitude temperature and humidity profile data for application to aircraft noise propagation
A data search of the weather statistics from 11 widely dispersed geographical locations within the continental United States was conducted. The sites, located long both sea-coasts and in the interior, span the northern, southern, and middle latitudes. The weather statistics, retrieved from the records of these 11 sites, consist of two daily observations taken over a 10-year period. The data were sorted with respect to precipitation and surface winds and classified into temperature intervals of 5 C and relative humidity intervals of 10 percent for the lower 1400 meters of the atmosphere. These data were assembled in a statistical format and further classified into altitude increments of 200 meters. The data are presented as sets of tables for each site by season of the year and include both daily observations
Noise characteristics of the O-1 airplane and some approaches to noise reduction
A brief study of the O-1A airplane to determine possible means for reducing the aircraft aural detection distance was conducted. This effort involved measuring the noise signature of the basic airplane, devising methods to attenuate the noise, and then estimating the effect of several selected modifications on the aural detection distance of the aircraft. A relatively simple modification utilizing a 6.5 ft diameter, six-blade propeller and including a muffler having a volume of 0.725 cu ft is indicated to reduce the aural detection distance of the O-1 aircraft from about 6 miles at an altitude of 1,000 ft and 2 to 3 miles at an altitude of 300 ft to approximately half these values. The flyover noise data suggest that routing the exhaust stacks up and over the wing would provide immediate noise reduction of about 5 dB with an attendant reduction in detection distance. Furthermore, all these studies confirm the work of other investigators that the 1/3 octave band (center frequency=125 cps) is the most critical in reducing aural detection distance
Dental safety net capacity: An innovative use of existing data to measure dentistsâ clinical engagement in state Medicaid programs
Background
The demand for dentists available for state Medicaid populations has long outpaced the supply of such providers. To help understand the workforce dynamics, this study sought to develop a novel approach to measuring dentistsâ relative contribution to the dental safety net and, using this new measurement, identify demographic and practice characteristics predictive of dentistsâ willingness to participate in Indiana's Medicaid program.
Methods
We examined Medicaid claims data for 1,023 Indiana dentists. We fit generalized ordered logistic regression models to measure dentistsâ level of clinical engagement with Medicaid. Using a partial proportional odds specification model, we estimated proportional adjusted odds ratios for covariates and separate estimates for each contrast of nonproportional covariates.
Results
Though 75% of Medicaidâenrolled dentists were active providers, only 27% of them had 800 or more claims during fiscal year 2015. As has been shown in previous studies, our findings from the proportional odds model reinforced certain demographic and practice characteristics to be predictive of dentistsâ participation in state Medicaid programs.
Conclusions
In addition to confirming predictive factors for Medicaid enrollment, this study validated the clinical engagement measure as a reliable method to assess the level of Medicaid participation. Prior studies have been limited by selfâreported data and variations in Medicaid claims reporting
A definitive merger-AGN connection at z~0 with CFIS: mergers have an excess of AGN and AGN hosts are more frequently disturbed
The question of whether galaxy mergers are linked to the triggering of active
galactic nuclei (AGN) continues to be a topic of considerable debate. The issue
can be broken down into two distinct questions: 1) Can galaxy mergers trigger
AGN? 2) Are galaxy mergers the dominant AGN triggering mechanism? A complete
picture of the AGN-merger connection requires that both of these questions are
addressed with the same dataset. In previous work, we have shown that galaxy
mergers selected from the Sloan Digital Sky Survey (SDSS) show an excess of
both optically-selected, and mid-IR colour-selected AGN, demonstrating that the
answer to the first of the above questions is affirmative. Here, we use the
same optical and mid-IR AGN selection to address the second question, by
quantifying the frequency of morphological disturbances in low surface
brightness r-band images from the Canada France Imaging Survey (CFIS). Only ~30
per cent of optical AGN host galaxies are morphologically disturbed, indicating
that recent interactions are not the dominant trigger. However, almost 60 per
cent of mid-IR AGN hosts show signs of visual disturbance, indicating that
interactions play a more significant role in nuclear feeding. Both mid-IR and
optically selected AGN have interacting fractions that are a factor of two
greater than a mass and redshift matched non-AGN control sample, an excess that
increases with both AGN luminosity and host galaxy stellar mass.Comment: Accepted for publication in MNRA
Policy Report: 2013 Indiana's Nursing Workforce
As Indiana plans for the development of a strong nursing workforce, data should be used to inform decisions that are able to 1) accurately describe the current workforce and 2) identify challenges and emerging issues. Data informed decisions will result in workforce policies and planning efforts that closely align with the actual health workforce needs. This report provides a âsnapshotâ of the most recent data on Indianaâs nursing workforce, identifies emerging issues, and presents information pertinent to workforce planning and policy
Policy Report: 2012 Indiana Pharmacist Workforce
In order to fully leverage the pharmacist workforce in primary
care delivery, which is focused more and more on cost-effective
and team-based models, the pharmacist workforce must be
clearly understood. Policymakers and health professionals
must examine data that depicts the practice characteristics,
demographics, capacity, and even the evolving role of
pharmacists. Furthermore, these data must influence policy
discussions that may lead to a more efficient health system. This report provides a âsnapshotâ of the most recent data on
Indianaâs pharmacist workforce, identifies emerging issues,
and presents information pertinent to workforce planning
and policy
- âŠ