An HPSG-Annotated Test Suite for Polish

The paper presents both conceptual and technical issues related to the construction of an HPSG test-suite for Polish. The test-suite consists of sentences of written Polish --- both grammatical and ungrammatical. Each sentence is annotated with a list of linguistic phenomena it illustrates. Additionally, grammatical sentences are encoded in HPSG-style AVM structures. We describe also a technical organization of the database, as well as possible operations on it. 1. Aims and Design Constraints The aim of this paper 1 is to describe Baza Rozbiorow Gramatycznych (Database of Grammatical Parses) --- a test-suite of written Polish sentences, created as a part of the European Union CRIT-2 project. The idea is based on the TSNLP project (Lehmann et al., 1996; Oepen et al., 1998), which resulted in creating test-suites for various European languages. As a test-suite, BRG contains not only grammatical sentences but also ungrammatical ones, violating various linguistic rules. At the moment, ..

Characterization of Charge Spreading and Gain of Encapsulated Resistive Micromegas Detectors for the Upgrade of the T2K Near Detector Time Projection Chambers

International audienceAn upgrade of the near detector of the T2K long baseline neutrino oscillation experiment is currently being conducted. This upgrade will include two new Time Projection Chambers, each equipped with 16 charge readout resistive Micromegas modules. A procedure to validate the performance of the detectors at different stages of production has been developed and implemented to ensure a proper and reliable operation of the detectors once installed. A dedicated X-ray test bench is used to characterize the detectors by scanning each pad individually and to precisely measure the uniformity of the gain and the deposited energy resolution over the pad plane. An energy resolution of about 10% is obtained. A detailed physical model has been developed to describe the charge dispersion phenomena in the resistive Micromegas anode. The detailed physical description includes initial ionization, electron drift, diffusion effects and the readout electronics effects. The model provides an excellent characterization of the charge spreading of the experimental measurements and allowed the simultaneous extraction of gain and RC information of the modules