870 research outputs found
Boundary effects on the scaling of the superfluid density
We study numerically the influence of the substrate (boundary conditions) on
the finite--size scaling properties of the superfluid density in
superfluid films of thickness within the XY model employing the Monte Carlo
method. Our results suggest that the jump at the
Kosterlitz--Thouless transition temperature depends on the boundary
conditions.Comment: 2 pages, 1 Latex file, 1 postscript figure, 2 style file
Red and orange laser operation of Pr:KYF4 pumped by a Nd:YAG/LBO laser at 469.1nm and a InGaN laser diode at 444nm
We report the basic luminescence properties and the continuous-wave (CW) laser operation of a Pr3+-doped KYF4 single crystal in the Red and Orange spectral regions by using a new pumping scheme. The pump source is an especially developed, compact, slightly tunable and intra-cavity frequency-doubled diode-pumped Nd:YAG laser delivering a CW output power up to about 1.4 W around 469.1 nm. At this pump wavelength, red and orange laser emissions are obtained at about 642.3 and 605.5 nm, with maximum output powers of 11.3 and 1 mW and associated slope efficiencies of 9.3% and 3.4%, with respect to absorbed pump powers, respectively. For comparison, the Pr:KYF4 crystal is also pumped by a InGaN blue laser diode operating around 444 nm. In this case, the same red and orange lasers are obtained, but with maximum output powers of 7.8 and 2 mW and the associated slope efficiencies of 7 and 5.8%, respectively. Wavelength tuning for the two lasers is demonstrated by slightly tilting the crystal. Orange laser operation and laser wavelength tuning are reported for the first time
All-solid-state electrochromic reflectance device for emittance modulation in the far-infrared spectral region
All-solid-state electrochromic reflectance devices for thermal emittance modulation were designed for operation in the spectral region from mid- to far-infrared wavelengths (2–40 μm). All device constituent layers were grown by magnetron sputtering. The electrochromic (polycrystalline WO3), ion conductor (Ta2O5), and Li+ ion-storage layer (amorphous WO3), optimized for their infrared (IR) optical thicknesses, are sandwiched between a highly IR reflecting Al mirror, and a 90% IR transmissive Al grid top electrode, thereby meeting the requirements for a reversible Li+ ion insertion electrochromic device to operate within the 300 K blackbody emission range. Multicycle optical switching and emittance modulation is demonstrated. The measured change in emissivity of the device is to 20%
Quality of Life among Cancer Survivors: Comparison of Multiple Cancers Using iCaRe2
Background: The number of cancer survivors continues to increase due to dramatic improvements in cancer treatment, accounting for approximately 5% of the entire population. As cancer survivors continue to live longer, it is important to understand their quality of life (QoL) in order to maximize supportive care efforts.
Objectives: In this study, the quality of life (QoL) among patients with different types of cancer was examined. The objectives were to: 1) compare patient-reported outcome measures of QoL using the Short-Form (SF-36) Health Survey scores among patients of different cancer types and 2) identify demographic, oncologic, and clinical factors that are associated with SF-36 QOL scores.
Methods: We performed a retrospective review of prospectively collected data from a multi-center cancer registry data collected between January 2007 and February 2020. Multiple linear regression analysis was conducted to identify demographic and clinical factors that are associated with SF-36 Physical Component Score (PCS) and Mental Component Score (MCS).
Findings: Both mental and physical aspects of QoL were affected in all cancer patients, regardless of the type, prognosis, and time since diagnosis and treatment. Individual, socioeconomic, disease, and treatment-related variables were associated with QoL among different cancer populations and should be addressed as part of shared treatment decision-making
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