Macroporous silicon has been etched from n-type Si, using a vertical etching cell where no rear side contact on the silicon wafer is necessary. The resulting macropores have been characterised by means of Scanning Electron Microscopy (SEM). After etching, SiO2 was thermally grown on the top of the porous silicon as an insulating layer and Si3N4 was deposited by means of Low Pressure Chemical Va...

from both philosophers and physicists, is its use in cosmology to explain the apparent fine-tuning of our universe. “Fine-tuning” refers to the supposed fact that there is a set of cosmological parameters or fundamental physical constants that are such that had they been very slightly different, the universe would have been void of intelligent life. For example, in the classical big bang model,...

Morse 2-functions and trisections of 4-manifolds (Room 1.316) Robion Kirby (University of California, Berkeley) I’ll talk about work with David Gay which extends the notion of a Morse function f : M → R to a function from a 4-manifold X to a 2-dimensional surface. Just as the former gives an existence and uniqueness theorem for Heegaard splittings of a 3-manifold M , the latter gives existence ...

Introduction Previous research has suggested that stalkers who are ex-partners are more likely to be violent towards their victims than acquaintance or stranger stalkers. A survey was conducted in Britain of 95 individuals who had contacted the Suzy Lamplugh Trust because they were being stalked. Method Eighty-seven of the victims were female and seven were male. They were put into three catego...

In this research work an attempt has been made to minimize flank wear of uncoated carbide inserts while machining AISI 1045 steel by finite element analysis. Tool wear is the predominant factor that causes poor surface finish and is responsible for the dimensional accuracy of the machined surface. The quality of component produced decides the effectiveness and competitiveness of any manufacturi...

The presence of Eurasian watermilfoil ( Myriophyllum spicatum L.) in aquatic systems has resulted in adverse impacts to native plant communities, ecosystem function, and water resource uses. Eurasian watermilfoil in Hayden Lake, Idaho, has spread rapidly, impacting the native plant community and recreational uses of the lake. Point intercept surveys were conducted to determine the current compo...

Eight 2-deoxystreptamine-negative (DOS-) mutants were isolated from various strains of Bacillus circulans, normally producing butirosin, xylostasin and ribostamycin. These mutants were classified into two groups (converter and secretor) by the simple method of cosynthesis using agar plate culture. One of the cosynthetic pairs, strain S-11, an intermediate of DOS biosynthesis, S-11-P, was isolat...

In some operational circumstances a fast evaluation of landfill leachate anaerobic treatability is necessary, and neither Biochemical Methane Potential nor BOD/COD ratio are fast enough. Looking for a fast indicator, this work evaluated the anaerobic treatability of landfill leachate from São Carlos-SP (Brazil) in a pilot scale Anaerobic Sequence Batch Biofilm Reactor (AnSBBR). The experiment w...

Since the grain boundaries (GBs) within the semiconductor layer of organic field-effect transistors (OFETs) have a strong influence on device performance, a substantial number of studies have been devoted to controlling the crystallization characteristics of organic semiconductors. We studied the intrinsic effects of GBs within 5,11-bis(triethylsilylethynyl) anthradithiophene (TES-ADT) thin fil...