Under the action of a complex and harsh working environment, damage IGBT power module's packaging interconnection structure is primary failure mode. The crack propagation bonding interface bond point shedding in wires will seriously affect device's electrical function heat dissipation ability, resulting its performance degradation failure. In this work, formulation application multiscale approa...

Abstract Dry-snow slab avalanches result from crack propagation in a highly porous weak layer buried within stratified and metastable snowpack. While our understanding of avalanche mechanisms improved with recent experimental numerical advances, fundamental micro-mechanical processes remain poorly understood due to lack non-invasive monitoring techniques. Using novel discrete model, we reproduc...

The very low frequency (VLF) propagation mapper (VPM) is a 6U CubeSat designed to measure VLF radio waves in Low-Earth Orbit. science goals of the VPM mission are signals broadcast by DSX mission, and study natural anthropogenic (from lightning transmitters) near-Earth space environment. primary payload consists an electric field dipole antenna deployed 2 meters length, magnetic search coil 50 ...

The article deals with the study on inclusion of biotechnology in selection roses. Roses are heterozygous plants and by seed propagation give splitting. Therefore, to accelerate reproduction new existing starting material, clonal micropropagation was included study. vitro process is influenced various factors. It should be noted that, initial stages it age mother plant season material isolation...

The tough bulk of dentin in teeth supports enamel, creating cutting and grinding biostructures with superior failure resistance that is not fully understood. Synchrotron-based diffraction methods, utilizing micro- and nanofocused X-ray beams, reveal that the nm-sized mineral particles aligned with collagen are precompressed and that the residual strains vanish upon mild annealing. We show the l...

Abstract To clarify the effect of Hindered amine light stabilizer (HALS) on ultraviolet (UV) aging behavior asphalt binder, evolution history and characteristics UV induced micro-structure modified were characterized. Scanning Electron Microscope (SEM) Atomic Force (AFM) used to analyze microscopic morphology stabilizer-modified during aging. By defining in joints by UV, identification classifi...