High Efficiency Collector for Laser Plasma EUV Source.

Collector optics for an EUV radiation source for collecting EUV radiation. The collector optics includes an elliptical dish reflector where light generated at a focal point of the reflector and is directed to a collection location. A frustal annual reflector is positioned around an outer edge of the dish reflector to collect more of the EUV radiation that may otherwise be lost. The radiation reflected by the annual reflector is directed to a center axicon reflector positioned between the focal point of the dish reflector and the collection location to redirect the radiation reflected by the annual reflector to be within a predetermined collection angle

Monolithic Silicon EUV Collector

A collector optic assembly for a EUV radiation source. The collector optic assembly includes an elliptical meniscus having a reflective Si/Mo coating for collecting and reflecting EUV radiation generated by the source. The meniscus is machined from a single piece of silicon. The collector optic assembly further includes a heat exchanger that includes cooling channels through which flows a liquid coolant. The heat exchanger is fabricated from a plurality of machined silicon sections fused together by a glass frit bonding process. The meniscus is fused to a front side of the heat echanger by a glass frit bonding process. A liquid coolant inlet manifold and a liquid coolant outlet manifold are also each machined from a single silicon block and are mounted to a back side of the heat exchange

Interview with Rich Arenberg by Brien Williams

Biographical NoteRichard A. “Rich” Arenberg, the son of Bernard and Mary Arenberg, was born on October 16, 1945, in Norwich Connecticut. He was a campus activist during his undergraduate years at Boston University, and worked on some local campaigns, including the campaign of Tom Atkins, the first African American city councilor in Boston. He received a Ph.D. in political science also from Boston University and has a background in survey research. He worked as the issues director for Paul Tsongas’s first congressional campaign in Massachusetts and continued on Tsongas’s congressional and Senate staff until Tsongas retired from the Senate in 1984. At that point he was hired as Senator Mitchell’s chief of staff and was involved with the Congressional Committee Investigating the Iran-Contra Affair. He later collaborated with Senators Mitchell and Cohen to write the book Men of Zeal. At the time of this interview he was working for Senator Carl Levin of Michigan. SummaryInterview includes discussion of: experiences as a staffer on Capitol Hill; Senator Mitchell’s decision-making style, in particular as compared to Senator Tsongas’s style; the role of a senator’s chief of staff; Democratic leadership positions in the Senate; the advantages of being a senator from a small state; Senator Mitchell’s ascent to the position of majority leader; the Iran-Contra Committee, Oliver North’s testimony, and Senator Mitchell’s questioning; the tension between pursuing justice and the public’s right to know regarding public scandals; collaborating with Senators Mitchell and Cohen on their book Men of Zeal and the two men’s distinct writing styles; the role of the deputy president pro tempore in the Senate; the tension between covert intelligence and democratic values, and the emphasis Mitchell placed on opening those issues up; the “Gang of Eight;” the congressional bunker at the Greenbrier Hotel; and the importance of pursuing solutions over partisan issues and the work Senator Mitchell did in that direction

Breaking the Cost Curve: Applying Lessons Learned from the James Webb Space Telescope Development to Build More Cost-Effective Large Space Telescopes in the Future

This paper looks at the key programmatic and technical drivers of the James Webb Space Telescope and assesses ways to building more cost-effective telescopes in the future. The paper evaluates the top level programmatics for JWST along with the key technical drivers from design through integration and testing. Actual data and metrics from JWST are studied to identify what ultimately drove cost on JWST. Finally, the paper assesses areas where applying lessons learned can reduce costs on future observatories and will provide better insights into critical areas to optimize for cost

Image directed lymph node sampling for lung cancer staging

http://deepblue.lib.umich.edu/bitstream/2027.42/117374/1/40644_2014_Article_102.pd

The effect of increased channel interaction on speech perception with cochlear implants.

Cochlear implants (CIs) are neuroprostheses that partially restore hearing for people with severe-to-profound hearing loss. While CIs can provide good speech perception in quiet listening situations for many, they fail to do so in environments with interfering sounds for most listeners. Previous research suggests that this is due to detrimental interaction effects between CI electrode channels, limiting their function to convey frequency-specific information, but evidence is still scarce. In this study, an experimental manipulation called spectral blurring was used to increase channel interaction in CI listeners using Advanced Bionics devices with HiFocus 1J and MS electrode arrays to directly investigate its causal effect on speech perception. Instead of using a single electrode per channel as in standard CI processing, spectral blurring used up to 6 electrodes per channel simultaneously to increase the overlap between adjacent frequency channels as would occur in cases with severe channel interaction. Results demonstrated that this manipulation significantly degraded CI speech perception in quiet by 15% and speech reception thresholds in babble noise by 5 dB when all channels were blurred by a factor of 6. Importantly, when channel interaction was increased just on a subset of electrodes, speech scores were mostly unaffected and were only significantly degraded when the 5 most apical channels were blurred. These apical channels convey information up to 1 kHz at the apical end of the electrode array and are typically located at angular insertion depths of about 250 up to 500°. These results confirm and extend earlier findings indicating that CI speech perception may not benefit from deactivating individual channels along the array and that efforts should instead be directed towards reducing channel interaction per se and in particular for the most-apical electrodes. Hereby, causal methods such as spectral blurring could be used in future research to control channel interaction effects within listeners for evaluating compensation strategies