Castil-Blaze troubadour

Matt Blaze

STIS Echelle Blaze Shift Correction

Planned offsets of the STIS Mode Select Mechanism (MSM) result in changes to the nominal calibration curves, particularly noticeable in the echelle modes. The spectral wave calibration exposures (wavecals) obtained with each observation can be used to predict a simple, linear offset of the nominal calibration curve to be used for each MSM shift. In addition, a time dependent variation has been ...

The Blaze Family of Languages Programming Parallel Architectures: T H E Blaze Family of Languages

Programming multiprocessor architectures is a critical research issue. This paper gives a n overview of the various approaches to programming these architectures that are currently being explored. We argue that two of these approaches, interactive programming environments and functional parallel languages, are particularly attractive, since they remove much of the burden of exploiting parallel ...

Degenerate four-wave interferences and perfect blaze

We present a simple model for understanding the perfect blaze for diffraction with echelle gratings. Littrow diffraction at grating profiles with rectangular apexangles implicates two pairs of counterpropagating light waves. The four waves show a rectangular pattern of interference fringes. Integer numbers of such fringes along both facets of a groove ensure perfect blazing with echelle gratings.

Actin hotspots blaze a trail along axons

Actin's role in guiding axonal growth cones towards their target is relatively well understood, but the cytoskeletal protein's function further back in the axonal shaft remains uncertain. Indeed, even the organization of actin in this part of the neuron is unclear. Ganguly et al. now describe how " hotspots " along the axon produce dynamic " trails " of actin fi laments that deliver actin to sy...