Spin-valve, weak localization/antilocalization, and scanned probe microscopy measurements are used to investigate the influence of sulfur-based surface treatments and electrically insulating barrier layers on spin injection into, and spin transport within, the two-dimensional electron layer at the surface of p-type InAs at 4.2 K. An electrically insulating barrier layer is found to be required ...

Municipal water disinfection systems in some areas are not always able to meet water consumer needs, such as ensuring distributed water quality, because household water management can be a contributing factor in water re-contamination. This fact is related to the storage options that are common in places where water is scarce or is distributed over limited time periods. The aim of this study is...

background: coordination is a critical factor in successful organization and appropriate response to disasters. in this regard, a centralized coordination mechanism is the first step towards an effective, efficient, and sustainable response in order to be ensured of the short- and long-term recovery. thus, this study aimed to identify and prioritize the barriers and facilitators of coordination...

Systematic ensemble photoluminescence studies have been performed on type-I InP-quantum dots in Al0.20Ga0.80InP barriers, emitting at approximately 1.85 eV at 5 K. The influence of different barrier configurations as well as the incorporation of additional tunnel barriers on the optical properties has been investigated. The confinement energy between the dot barrier and the surrounding barrier ...

Barriers are a fundamental synchronization primitive, underpinning the parallel execution models of many modern shared-memory parallel programming languages such as OpenMP, OpenCL or Cilk, and are one of the main challenges to scaling. State-of-the-art barrier synchronization algorithms differ in tradeoffs between critical path length, communication traffic patterns and memory footprint. In thi...

We examine the reduction in efficiency in a system where each processor has a sequence of tasks and must synchronize with other processors after each task is done. This occurs, for example, in many stepwise simulations. In OpenMP, the only explicit synchronization is the barrier, which causes all processors to wait for the slowest one. This is problematic when the tasks take variable amounts of...

Toxic and harmful gases may follow evacuees into the mine refuge chamber, endangering their life during disaster. Gases from outside environment are successfully kept out of chamber by air curtains. The effect curtain installation position, jet velocity, angle, structural parameters on CO barrier efficiency is studied using numerical simulation computational fluid dynamics (CFD) in this paper. ...

The performance of AlGaN-based light-emitting diodes (LEDs) emitting at UVA–UVC regions can be severely compromised due to the polarization difference (ΔP) between last quantum barrier (LQB) and electron blocking layer (EBL). In this work, different situations bandgap (ΔE g ) ΔP InAlN/AlGaN AlGa...