The Infrared Imaging Spectrograph (IRIS) for TMT: Instrument Overview

We present an overview of the design of IRIS, an infrared (0.84 - 2.4 micron) integral field spectrograph and imaging camera for the Thirty Meter Telescope (TMT). With extremely low wavefront error (<30 nm) and on-board wavefront sensors, IRIS will take advantage of the high angular resolution of the narrow field infrared adaptive optics system (NFIRAOS) to dissect the sky at the diffraction limit of the 30-meter aperture. With a primary spectral resolution of 4000 and spatial sampling starting at 4 milliarcseconds, the instrument will create an unparalleled ability to explore high redshift galaxies, the Galactic center, star forming regions and virtually any astrophysical object. This paper summarizes the entire design and basic capabilities. Among the design innovations is the combination of lenslet and slicer integral field units, new 4Kx4k detectors, extremely precise atmospheric dispersion correction, infrared wavefront sensors, and a very large vacuum cryogenic system.Comment: Proceedings of the SPIE, 9147-76 (2014

The Autoling System

The AUTOLING system represents an attempt to replace the human linguist with a machine in the process of linguistic fieldwork with an informant. To the extent that the attempt succeeds, the analytic and heuristic methodology of live linguists can be considered formalized. The current system consists of three as yet unjained components: a morphological analyzer, a program for learning context-free phrase structure grammar, and a program for learning monolingual and bilingual transformations. All programs are written in ALGOL and operational on the Burroughs B-5500 computer. The capabilities of the system are illustrated with examples of its treatment of selected problems in English, Latin, Roglai, Indonesian, Thai, Chinese and German