35 research outputs found
Larval application of sodium channel homologous dsRNA restores pyrethroid insecticide susceptibility in a resistant adult mosquito population
Heat/mass transfer from a neutrally buoyant sphere by mixed natural and forced convection in a simple shear flow
Building on the work of Yang et al. in 2011, the finite difference method and the Boussinesq approximation were applied to solve the time-dependent Navier-Stokes, convection diffusion and continuity equations in spherical coordinates. An idealized condition, the mass transfer from a neutrally buoyant sphere in a horizontal simple shear flow with natural convection was numerically simulated for the first time in this work. In the hybrid transfer case, the outwardly spiraling streamlines enhanced the transfer process, but the counter-gravity spiraling streamlines near the sphere hindered the natural convection and the spatial dilution action weakened the natural convection transfer process. These competing effects led to nonmonotonic behavior of the Nusselt number with Reynolds number. Results from these previously undocumented cases were summarized into correlations for predicting Nusselt numbers at finite Reynolds numbers for various Grashof and Prandtl numbers. (c) 2018 American Institute of Chemical Engineers AIChE J, 64: 2816-2827, 201
Friction and Wear Behavior of TiAl Matrix Composites Incorporated with Silver and Molybdenum Disulfide
Computer-aided design of carbon nanotubes with the desired bioactivity and safety profiles
Influence of welded hollow spherical joints on the mechanical behavior of single-layer reticulated shell structures
Spatial characteristics of ecological stoichiometry and their driving factors in farmland soils in Poyang Lake Plain, Southeast China
On Intuitionistic Fuzzy Copula Aggregation Operators in Multiple- Attribute Decision Making
Effects of combined menaquinone-4 and PTH1–34 treatment on osetogenesis and angiogenesis in calvarial defect in osteopenic rats
Room-Temperature Continuous-Wave Operation of InGaN-Based Blue-Violet Laser Diodes with a Lifetime of 15.6 Hours
We report our recent progress of investigations on InGaN-based blue-violet laser diodes (LDs). The room-temperature (RT) cw operation lifetime of LDs has extended to longer than 15.6 h. The LD structure was grown on a c-plane free-standing (FS) GaN substrate by metal organic chemical vapor deposition (MOCVD). The typical threshold current and voltage of LD under RT cw operation are 78 mA and 6.8 V, respectively. The experimental analysis of degradation of LD performances suggests that after aging treatment, the increase of series resistance and threshold current can be mainly attributed to the deterioration of p-type ohmic contact and the decrease of internal quantum efficiency of multiple quantum well (MQW), respectively