In this paper we present a prototype of a Strip Resistive Thick GEM (S-RETGEM) photosensitive gaseous detector filled with Ne and ethylferrocene (EF) vapours at a total pressure of 1 atm for an early forest fire detection system. Tests show that it is one hundred times more sensitive than the best commercial ultraviolet (UV) flame detectors; and therefore, it is able to reliably detect a flame ...

PURPOSE The aim of this study was to measure the image quality of a digital breast tomosynthesis (DBT) system quantitatively. MATERIALS AND METHODS The signal transfer property (STP), modulation transfer function (MTF), noise power spectrum (NPS), and detective quantum efficiency (DQE) of the Hologic Selenia Dimensions breast tomosynthesis system were measured according to established methods...

The hybrid Pierre Auger Observatory, consisting of fluorescence detector with 24 telescopes and of surface detector with more than 1600 water Cherenkov stations, has been collecting high quality data since January 2004. In this contribution we present namely current results of studies of ultra-high energy cosmic ray composition and related results concerning the energy spectrum of these particl...

This paper introduces a robust method for performing active actuator fault detection and diagnostics (FDD) in heating ventilation and air conditioning (HVAC) systems. The proposed actuator FDD strategy, for testing whether an actuator is stuck in a given position, is designed on using an invariant hypothesis testing approach and is an improvement of a previous strategy that employed an adaptive...

The primary goal of the Stockholm Educational Air Shower Array (‘SEASA’) project is to bring the intellectual and technical challenge of scientific research to high-school (16 – 18 years old) students. The focus of the project is the high energy cosmic radiation which continually bombards the earth’s atmosphere, generating showers of secondary particles. These showers can be detected by a netwo...

The Roma International Conference on Astroparticle Physics covered gamma-ray astronomy, air shower experiments and neutrino astronomy on three successive days. I organize my brief summary comments into four topics that cut across these three techniques. They are detector calibration, galactic sources, extra-galactic sources and cosmology.

ARGO−YBJ is a “full coverage” air shower detector under construction at the YangBaJing Laboratory (4300 m a.s.l., Tibet, P.R. of China). Its main goals are γ-ray astronomy and cosmic ray studies. In this paper we present the capabilities of ARGO−YBJ in detecting the emission from Gamma Ray Bursts (GRBs) at energies E > 10 GeV .

With the recent successes of gamma-ray astronomy an obvious question is raised: where is this field going next? At present we have a network of similar air Cerenkov telescope arrays throughout the world and a large water detector in the USA. Here we try to identify which practical paths exist to newer, more sensitive instruments and what these might hold for the future.

A cosmic ray detection system, consisting of standardized detector stations connected through the Internet, is described. The system can be used for detecting air showers that arrive over a wide area with correlated time. The data at each site are exchanged in (quasi) real time, which makes the system suitable for displaying cosmic ray arrivals at museums and schools.