Laser-assisted local metal-organic vapor phase epitaxy.

Selective area epitaxial growth is an important technique, both for monolithic device integration as well as for defect reduction in heteroepitaxy of crystalline materials on foreign substrates. While surface engineering with masking materials or by surface structuring is an effective means for controlling the location of material growth, as well as for improving crystalline properties of epitaxial layers, the commonly involved integral substrate heating presents a limitation, e.g.

Direct Imaging of the Carrier Capture into Individual InP Quantum Dots of a Semiconductor Disk Laser Membrane.

We report on nanoscopic exploration of the luminescence from individual InP quantum dots (QDs) by means of highly spatially resolved cathodoluminescence (CL) spectroscopy directly performed in a scanning transmission electron microscope (STEM). A 7-fold layer stack with high-density InP quantum dots is embedded as an active medium membrane in an external-cavity surface-emitting laser. We characterize the vertical transfer of carriers within the periodic separate confinement heterostructure and determine the capture efficiency of carriers from the cladding layer into the quantum dot layers.

Predictors of Attrition Among Accelerated and Traditional Physician Assistant Students.

Purpose: Students can be admitted to a physician assistant program via an accelerated bachelor of science/master of science (BS/MS) track or by a postbaccalaureate track. The purpose of this study was to identify predictors of student attrition based on differences in modes of admission.

Methods: Student admissions and retention data were collected for 277 students in the physician assistant program at the New York Institute of Technology from the graduation years 2016 to 2020.

General Self-Efficacy and Body Weight: The Role of Race and Gender.

Overweight and obesity have become a prominent concern for policymakers, the Surgeon General, scholars, and for work organizations. The estimated annual cost of obesity in terms of lost productivity is in the tens of billions of dollars, and the estimated annual medical cost of obesity is in the hundreds of millions of dollars. Psychologists have become increasingly interested in issues related to body weight, such as ways to help people reduce body weight.

Managing the health of the eSport athlete: an integrated health management model.

Objectives: eSport is a form of electronic gaming, also known as professional or competitive video gaming, and is growing at a rapid pace worldwide. Over 50 US colleges have established varsity gaming teams over the past three years; some colleges offer eSport scholarships as they do for traditional sports. There is little objective research on the health habits of these players who are often placed under the direction of the athletics department on college campuses, and there is currently no health management model on how to treat these new athletes.

Direct imaging of Indium-rich triangular nanoprisms self-organized formed at the edges of InGaN/GaN core-shell nanorods.

Higher indium incorporation in self-organized triangular nanoprisms at the edges of InGaN/GaN core-shell nanorods is directly evidenced by spectral cathodoluminescence microscopy in a scanning transmission electron microscope. The nanoprisms are terminated by three 46 nm wide a-plane nanofacets with sharp interfaces forming a well-defined equilateral triangular base in the basal plane. Redshifted InGaN luminescence and brighter Z-contrast are resolved for these structures compared to the InGaN layers on the nanorod sidewalls, which is attributed to at least 4 % higher indium content.

Validation of the RT3 accelerometer for measuring physical activity of children in simulated free-living conditions.

This is a validation study of the RT3 accelerometer for measuring physical activities of children in simulated free-living conditions. Twenty-five children age 12-14 years completed indoor testing, and 18 of them completed outdoor testing. Activity counts from the RT3 accelerometer estimated activity energy expenditure (AEE) and the Cosmed K4b2 analyzer measured oxygen uptake.