The difficulty of locating and identifying radiological sources over large areas is well known. The signal strength of a small-volume source diminishes according to the familiar “inverse square law” as the detector is moved away from the source. Ever-present fluctuating background levels exacerbate the problem when the source strength is weak compared to the background count rates from other so...

We formulate the data analysis problem for the detection of the Newtonian waveform from an inspiraling compact-binary by a network of arbitrarily oriented and arbitrarily distributed laser interferometric gravitational wave detectors. We obtain for the first time the relation between the optimal statistic and the magnitude of the network correlation vector, which is constructed from the matched...

Because of the major impact of the radioactive materials on the environment, their characterization methods have to be well defined, complete and agreed by the control bodies and the civil society. The paper presents measurements of certified etalon gamma emitting radiation sources, in order to perform the energy and the efficiency calibration of a new HPGe spectrometric system, and to determin...

The challenge of interest point detectors is to find, in an unsupervised way, keypoints easy to extract and at the same time robust to image transformations. In this paper, we present a novel set of saliency features that takes into account the region inhomogeneity in terms of intensity and shape. The region complexity is estimated at real-time by means of the entropy of the grey-level informat...

Results of a search for dark-matter induced annual modulation using 830.5 kg·days of data collected at the Sierra Grande underground laboratory with a germanium detector are presented. The analysis of the data does not show ∗Present address: Laboratory for High Energy Physics, University of Bern, Sidlerstrasse 5, CH 3012, Bern, Switzerland. †Present address: Department of Physik E15, Technische...

The development and tests results of a I monitoring system prototype designed for the CMS Muon Spectrometer alignment are described. The system, using a sweeping laser beam, defines a light reference plane to be used for the continuous monitoring of the Muon detectors. The performance of the system in the Laboratory was satisfactory. It showed good stability and linearity response behaviour. Wi...