4,4-Dimethyl-2-[3-nitro-2-phenyl-1-(phenyl­sulfan­yl)prop­yl]-4,5-dihydro-1,3-oxazole

In the title compound, C20H22N2O3S, the oxazoline ring is planar (r.m.s. deviation = 0.045 Å) and forms dihedral angles of 47.24 (8) and 10.11 (8)° with the S- and C-bound phenyl rings, respectively. The nitro group lies to the same side of the mol­ecule as the oxazoline ring but is orientated so as not to inter­act with the ring. Linear supra­molecular chains along [010] are formed via C—H⋯O and C—H⋯S contacts. Chains are consolidated into a three-dimensional architecture by C—H⋯π and van der Waals inter­actions

Defect formation during binder removal in ethylene vinyl acetate filled system

This paper focuses on determining the criteria for defect formation during the early stages of thermal binder removal within an ethylene vinyl acetate (EVA) polymer filled with submicron SiC ceramic powder. The only product of the early stage thermal degradation reaction of EVA within an inert atmosphere is acetic acid. This single component and well characterized organic reaction product has allowed the defect forming criteria to be definitively examined. It will be shown that bloating occurs in the early stages of binder removal as a result of pressure build-up in the specimen resulting from acetic acid formed from the thermal elimination reaction of EVA. The first part of this paper examines defect formation occurring in the pure polymer within a hot-stage optical microscope. Bubble formation is observed in the pure polymer. Next, bloating occurring in the molded system is examined. The affect of mineral oil on bloating is also discussed as well as the effect that molding pressure has on bloating. It was found that molding pressure effects defect formation. Finally, this paper presents binder removal maps that were developed for specimens up to 8 mm thick. These bloating maps indicate the existence of two primary bloating regimes.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/44754/1/10853_2004_Article_232418.pd

Construction, test and commissioning of the triple-GEM tracking detector for COMPASS

The Small Area Tracking system of the COMPASS experiment at CERN includes a set of 20 large area, fast position-sensitive Gas Electron Multiplier (GEM) detectors, designed to reliably operate in the harsh radiation environment of the experiment. We describe in detail the design, choice of materials, assembly procedures and quality controls used to manufacture the devices. The test procedure in the laboratory, the performance in test beams and in the initial commissioning phase in the experiment are presented and discussed

cis-2-Tri-n-butylstannylvinyl cuprates: a new synthon for the cis-1,2-ethene dianion

Conjugate additions of lower order and higher order cyano cuprates containing the cis-2-tri-n-butylstannylvinyl group to cycloalkenones have been studied. The higher order cuprates were more reactive towards hindered enones such as 4,4- dimethylcyclohexenone and 2,4,4-trimethylcyclohexenone, and produced higher yields with the base-sensitive acetonide of cis-4,5-dihydroxycyclohexenone.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/30275/1/0000676.pd

Proposal of heuristic regression method applied in descriptive data analysis: case studies

The purpose of this paper is to use the hybridized optimization method in order to find mathematical structures for analysis of experimental data. The heuristic optimization method will be hybridized with deterministic optimization method in order to that structures found require not knowledge about data generated experimentally. Five case studies are proposed and discussed to validate the results. The proposed method has viable solution for the analysis of experimental data and extrapolation, with mathematical expression reduced