The design and development of large scale, high quantum efficiency and high resolution silicon and silicon-germanium (Si/SiGe) avalanche photodiode (APD) focal plane arrays (FPAs) is an active topic of research due to the wide range of scientific, medical and industrial applications for such high sensitivity imagers. Avalanche photodiodes can attain single photon sensitive operation due the lar...

Abstract Avalanches result from an interaction of weather and terrain, where past internal snow cover processes play important roles. So far, climatology was mainly based on data, as regional instability information, such avalanche activity, is scarce climatological time scales. We present a new approach to create simulations problem types reanalysis data cluster analysis. Analyzing the winters...

the so-called phytoextraction in which hyperaccumulator plants are used to remediate the contaminated soils is proven to be an efficient method. the objective of this study was to investigate the capability of spinach for phytoremediation of cadmium from cd-contaminated soils and determine the efficiency extent of spinach for phytoremediation. for this purpose, a randomized block experimental d...

The dynamics of the avalanche width in the evolution model is described using a random walk picture. In this approach the critical exponents for avalanche distribution, τ , and avalanche average time, γ, are found to be the same as in the previous mean field approximation but SOC appear at λ critical = 2/3, which is very close to numerical value. A continuous time random walk is studied numeric...

Several years ago, my buddy Steve died in an avalanche. It was a stormy day and the avalanche danger was high, but Steve and his partners felt that by choosing a familiar route and carefully managing their exposure, they could stay out of trouble. After all, they were experienced backcountry skiers with avalanche training. Steve, the most skilled of the group, had just visited the area less tha...

We present a silicon avalanche photodetector (APD) fabricated with standard complementary metal-oxide-semiconductor (CMOS) technology without any process modification or special substrates. The CMOS-APD is based on N+/P-well junction, and its current-voltage characteristics, responsivity, avalanche gain, and photodetection frequency response are measured. Gain-bandwidth product over 1 THz is ac...

We assess the predictive capabilities of various classes of avalanche models for solar flares. We demonstrate that avalanche models cannot generally be used to predict specific events due to their high sensitivity to their embedded stochastic process. We show that deterministically driven models can nevertheless alleviate this caveat and be efficiently used for large events predictions. Our res...

trehalose is the alpha, alpha-1,1-linked glucose disaccharide. its metabolism is found in a wide variety of organisms and is seen as evolutionary old. trehalose metabolites are however present at only very low concentrations and their role in plants are not understood. the physiological effects of 100 mm trehalose on growth and carbon allocation in seedlings are characterized in this paper. tre...

In this study, Stability analysis of snow slab which is under detonation has developed in the present model. The model has been studied by using the basic concepts of non-detonation model and concepts of underwater explosions with appropriate modifications to the present studies. The studies have also been extended to account the effect of critical length variations at the time of detonation an...