Agency: National Science Foundation | Branch: | Program: STTR | Phase: Phase I | Award Amount: 150.00K | Year: 2007
This Small Business Technology Transfer (STTR) Phase I project aims to develop the technology for the manufacture of complex 3-D micro-devices from an array of metal and ceramic nanometer-scale particulates. In a novel lithographic gelcasting (LGC) process, multilayer molds will be made using standard photolithography techniques used in the semiconductor industry, and each mold layer cast with nanometer-scale particulate materials. The resulting multilayer parts will then be sintered to fuse the particles into a dense solid. The innovation will expand the suite of available micro-manufacturing processes, allowing more complex parts to be made from a much wider variety of materials. The broad impact of this research will be the manufacture of micro-surgical instruments to enable the next generation of minimally invasive surgical procedures. The technology developed under the NSF STTR funding will be transferred to industry via commercialization. The technology could also have profound implications in a wide range of industries where ceramic and metal microscale devices are needed. For example, all the micro-mechanical systems being proposed such as micro air and land vehicles, micro robots, and micro surveillance system must be assembled from robust micro-components that can withstand the environments, stresses, and fatigue lives of their macroscopic counterparts.
Illoul H.,Campus University Bois des Cars |
Hernandez F.R.,FARO |
Vila M.,CSIC - Institute of Marine Sciences |
Adjas N.,Applied |
And 6 more authors.
Cryptogamie, Algologie | Year: 2012
This work describes the first toxic event (human intoxications and sea urchin mortality) related to Ostreopsis bloom in Algerian coastal waters. The distribution of Ostreopsis is presented in three rocky beaches of Algiers Wilaya, where several cases of human intoxications were registered during July 2009. The maximum abundances attained by Ostreopsis in other stations of the network established by the Agency for the Protection and Promotion of Algiers Wilaya coasts (APPL) for monitoring HABs species are also presented. We discuss some of the factors that could explain this toxic episode. © 2012 Adac. Tous droits réservés. Source
Sanders H.,Applied |
IPAC 2012 - International Particle Accelerator Conference 2012 | Year: 2012
Most switches used for high current, high voltage accelerator applications are vacuum or gas switches, such as spark gaps and thyratrons. Recently, high voltage IGBT based switches have become common, but are limited in current and are not compact. This paper will describe a compact, high current, high voltage solid state switch. These switches have been tested to 50kV, to greater than 12kA, to greater than 50kA/μs, to 360Hz, and to 3x108 pulses, without failure. They have been used in accelerators to drive klystrons and kickers, and have been used as crowbars while offering advantages over thyratron switches for cost, lifetime, size and weight. The switches are based on series connected fast thyristors with 3cm2 die in a 20cm2 package. This package is more compact than TO-200 Puk sized devices, and does not require compression for proper operation. Each package is rated for 4kV, 14kA and 30kA/μs. One example, a 48kV switch which includes the trigger and snubber circuits, fits in a volume of 200mm x 85mm x 65mm, and requires only a fiber-optic trigger input. Such switches have been used on SRS and EMMA at Daresbury Laboratory in the UK, and at several US national laboratories. Copyright © 2012 by IEEE. Source