In many cases new technologies are driven by the development of novel materials providing properties or combinations of properties that were not available before. The use of polymers and silicon-based semiconductor technologies are just two examples of how the availability of certain materials revolutionized existing technologies and products, giving rise to completely new technologies and havi...

silicon nanowire (sinw) arrays were produced by electroless method on polycrystalline si substrate, in hf/ agno3 solution. although the monocrystalline silicon wafer is commonly utilized as a perfect substrate, polycrystalline silicon as a low cost substrate was used in this work for photovoltaic applications. in order to study the influence of etching time (which affects the sinws length) on d...

This brief review will be concerned with heterolytic cleavages of carbon— silicon and related bonds, and will concentrate on some more recent investigations by the author and his co-workers. The C—Si bond is fairly stable towards homolytic fission, and under free radical conditions the C—H bonds of organosilicon compounds are usually more readily attacked than the C—Si bonds1. The C—Si bond is ...

Immigrants Assimilate as Communities, Not Just as Individuals There is a large econometric literature that examines the economic assimilation of immigrants in the United States and elsewhere. On the whole immigrants are seen as atomistic individuals assimilating in a largely anonymous labour market, a view that runs counter to the spirit of the equally large literature on ethnic groups. Here we...

the sunflower caterpillar chlosyne lacinia saundersii (lepidoptera: nymphalidae) is considered a major pest in sunflower, causing severe defoliation and, thus, threatening production of oilseed. chemical control remains the most widely used method for the management of this defoliator. to manage insect pests, there is a need to use substances of low toxicity that are able to stimulate the plant...

Three decades of research in the last century developed silicon nitride (Si3N4) as one strongest and toughest ceramic material for structural applications; but this century, we newly discovered its gifted surface biochemistry. In an aqueous environment, Si3N4 undergoes hydrolysis with slow continuous elution both nitrogen. A unique environment is created, which greatly enhances healing soft oss...

This paper provides a personal perspective on our group’s efforts in building event-based vision sensors, algorithms, and applications over the period 2002-2012. Some recent advances from other groups are also briefly described. When Mahowald and Mead built the first silicon retina with asynchronous digital output around 1992 [1], conventional CMOS active pixel sensors (APS) were still research...