From ACIS to Zamama

ACIS Absolute QE the

Update to the ACIS Contamination Model

ACIS observations of astronomical sources as well as its own external calibration source (ECS) have shown that molecular contamination has been building up on the optical/UV blocking filters since launch. Early LETG/ACIS observations of Ton S180 in Nov. 1999 and 3C 273 in Jan. 2000 showed that there was a slight reduction in the low energy ACIS QE1. A nearsimultaneous LETG/HRC-S observation of ...

Composition of the Chandra ACIS contaminant

The Advanced CCD Imaging Spectrometer (ACIS) on the Chandra X-ray Observatory is suffering a gradual loss of low energy sensitivity due to a buildup of a contaminant. High resolution spectra of bright astrophysical sources using the Chandra Low Energy Transmission Grating Spectrometer (LETGS) have been analyzed in order to determine the nature of the contaminant by measuring the absorption edge...

from linguistics to literature: a linguistic approach to the study of linguistic deviations in the turkish divan of shahriar

chapter i provides an overview of structural linguistics and touches upon the saussurean dichotomies with the final goal of exploring their relevance to the stylistic studies of literature. to provide evidence for the singificance of the study, chapter ii deals with the controversial issue of linguistics and literature, and presents opposing views which, at the same time, have been central to t...

th IEEE / ACIS International Conference on Software

#20 Functional requirement improvements through size measurement: a case study with inexperienced measurers #38 Extending the UML metamodel to provide support for crosscutting concerns #60 Privacy Protection Mechanisms for the Web Service Technology Diego Garcia #22 Stepwise design of BPEL web services compositions an Event B refinement based approach Idir Ait-Sadoune and Yamine Ait-Ameur #13 M...