1,303 research outputs found
Toxic Shock-like Syndrome Associated with Necrotizing Streptococcus Pyogenes Infection
Two patients with toxic shock-like syndrome are presented. Both patients had necrotizing cellulitis due to Streptococcus pyogenes, and both patients required extensive surgical debridement. The association of Streptococcus pyogenes infection and toxic shock-like syndrome is discussed
Purpura Fulminans Secondary to Serratia Marcescens Septicemia
A 35-year-old woman developed Serratia marcescens septicemia and purpura fulminans with evidence of disseminated intravascular coagulation. She was successfully treated with heparin sodium and antibiotics
A Consumer Test of Canned Seasoned Salad Tomatoes
Consumer, Canned Tomatoes, Salad Tomatoes, Seasoned Tomatoes, Consumer/Household Economics, Food Consumption/Nutrition/Food Safety,
Transportation Behavior Among Older Vietnamese Immigrants in the Dallas-Fort Worth Metroplex: Well-Being, Geospatial Mobility, and Potential Indicators for Ride Providersâ Geospatial Burden
Nearly 4.6 million immigrants aged 65 and older live in the United States. This population is expected to more than triple in size by 2050. A lack of culturally appropriate transportation solutions for older immigrants creates disparities in access to services for older immigrant populations, increasing their risk of social isolation and reduced physical and mental health. A growing number of older immigrants live in low-density urban environments, which are characterized by high automobile dependency and limited public transportation. In these environments, older immigrants are likely to depend on others to provide private transportation. Negative aspects of this reliance on others are that the private transportation providers may be at risk for caregiver burden and stress, and older immigrants may lack transportation to social or health opportunities if their ride providers are unavailable.
This survey research examines the mobility; activity spaces; transportation patterns, resources, and needs; transportation-related support networks; and health and well-being among older Vietnamese adults in the Dallas-Fort Worth metroplex. It also investigates the provision of rides from private transportation providers and the impact of providing rides to an older Vietnamese adult in an urban area. It uses geographic information systems (GIS) to construct regular activity spaces for the older adults and their ride providers, and ride-provision activity spaces for the ride providers. Using the ride providers\u27 activity spaces, it proposes three indicators of geospatial burden for providing rides.
Findings indicate that the older adults and their ride providers rely on automobiles for transportation. Most of the older adults receive rides for transportation and their ride providers are also Vietnamese and primarily speak Vietnamese. The GIS analyses suggest that constructing activity spaces with self-reports of regular and ride-provision routine activities and locations may be an appropriate assessment tool to provide valuable insights into the burden of providing rides. The best performing burden indicator was the percentage of the ride-provision activity space that was not within the boundaries of the ride providersâ regular activity spac
Modeling and Control Design for a Turboelectric Single Aisle Aircraft Propulsion System
A nonlinear dynamic model with full flight envelope controller is developed for the propulsion system of a partially turboelectric single-aisle aircraft. The propulsion system model consists of two turbofan engines with a large percentage of power extraction, feeding an electric tail fan for boundary layer ingestion. The dynamic model is compared against an existing steady state design model. An electrical system model using a simple power flow approach is integrated into existing modeling tools used for dynamic simulation of the turbomachinery of the vehicle. In addition to the simple power flow model of the electrical system, a more detailed model is used for comparison at a key vehicle transient flight condition. The controller is a gain scheduled proportional-integral type that is examined throughout the flight envelope for performance metrics such as rise time and operability margins. Potential improvements in efficiency for the vehicle are explored by adjusting the power split between the energy used for thrust by the turbofans and that extracted to supply power to the tail fan. Finally, an operability study of the vehicle is conducted using a 900 nautical mile mission profile for a nominal vehicle configuration, a deteriorated propulsion system at the end of its operating life, and an optimized power schedule with improved efficiency
Coexistence of nonequilibrium density and equilibrium energy distribution of quasiparticles in a superconducting qubit
The density of quasiparticles typically observed in superconducting qubits
exceeds the value expected in equilibrium by many orders of magnitude. Can this
out-of-equilibrium quasiparticle density still possess an energy distribution
in equilibrium with the phonon bath? Here, we answer this question
affirmatively by measuring the thermal activation of charge-parity switching in
a transmon qubit with a difference in superconducting gap on the two sides of
the Josephson junction. We then demonstrate how the gap asymmetry of the device
can be exploited to manipulate its parity.Comment: Updated acknowledgements, corrected typo
Evidence for Reionization at z ~ 6: Detection of a Gunn-Peterson Trough in a z=6.28 Quasar
We present moderate resolution Keck spectroscopy of quasars at z=5.82, 5.99
and 6.28, discovered by the Sloan Digital Sky Survey (SDSS). We find that the
Ly Alpha absorption in the spectra of these quasars evolves strongly with
redshift. To z~5.7, the Ly Alpha absorption evolves as expected from an
extrapolation from lower redshifts. However, in the highest redshift object,
SDSSp J103027.10+052455.0 (z=6.28), the average transmitted flux is
0.0038+-0.0026 times that of the continuum level over 8450 A < lambda < 8710 A
(5.95<z(abs)<6.16), consistent with zero flux. Thus the flux level drops by a
factor of >150, and is consistent with zero flux in the Ly Alpha forest region
immediately blueward of the Ly Alpha emission line, compared with a drop by a
factor of ~10 at z(abs)~5.3. A similar break is seen at Ly Beta; because of the
decreased oscillator strength of this transition, this allows us to put a
considerably stronger limit, tau(eff) > 20, on the optical depth to Ly Alpha
absorption at z=6.
This is a clear detection of a complete Gunn-Peterson trough, caused by
neutral hydrogen in the intergalactic medium. Even a small neutral hydrogen
fraction in the intergalactic medium would result in an undetectable flux in
the Ly Alpha forest region. Therefore, the existence of the Gunn-Peterson
trough by itself does not indicate that the quasar is observed prior to the
reionization epoch. However, the fast evolution of the mean absorption in these
high-redshift quasars suggests that the mean ionizing background along the line
of sight to this quasar has declined significantly from z~5 to 6, and the
universe is approaching the reionization epoch at z~6.Comment: Revised version (2001 Sep 4) accepted by the Astronomical Journal
(minor changes
Return to Fort Rock Cave: Assessing the Site\u27s Potential to Contribute to Ongoing Debates about how and when Humans Colonized the Great Basin
Oregonâs Fort Rock Cave is iconic in respect to both the archaeology of the northern Great Basin and the history of debate about when the Great Basin was colonized. In 1938, Luther Cressman recovered dozens of sagebrush bark sandals from beneath Mt. Mazama ash that were later radiocarbon dated to between 10,500 and 9350 cal B.P. In 1970, Stephen Bedwell reported finding lithic tools associated with a date of more than 15,000 cal B.P., a date dismissed as unreasonably old by most researchers. Now, with evidence of a nearly 15,000-year-old occupation at the nearby Paisley Five Mile Point Caves, we returned to Fort Rock Cave to evaluate the validity of Bedwellâs claim, assess the stratigraphic integrity of remaining deposits, and determine the potential for future work at the site. Here, we report the results of additional fieldwork at Fort Rock Cave undertaken in 2015 and 2016, which supports the early Holocene occupation, but does not confirm a preâ10,500 cal B.P. human presence
Search for Point Sources of Ultra-High Energy Cosmic Rays Above 40 EeV Using a Maximum Likelihood Ratio Test
We present the results of a search for cosmic ray point sources at energies
above 40 EeV in the combined data sets recorded by the AGASA and HiRes stereo
experiments. The analysis is based on a maximum likelihood ratio test using the
probability density function for each event rather than requiring an a priori
choice of a fixed angular bin size. No statistically significant clustering of
events consistent with a point source is found.Comment: 7 pages, 7 figures. Accepted for publication in The Astrophysical
Journa
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