1,721,500 research outputs found
Alauro Orlando d'. — Ligurie
No full textL. F. Alauro Orlando d'. — Ligurie. In: Population, 16ᵉ année, n°3, 1961. p. 543
A novel noise jamming detection algorithm for radar applications
No full textIn this letter, we devise and assess a new algorithm to detect a platform equipped with self-screening jamming systems. The latter illuminates the victim radar by means of noiselike signals leading to an increase of the constant false alarm rate threshold (at the detection stage) and a reduction of radar sensitivity. The problem is formulated in terms of a binary hypothesis test exploiting the rank-onemodification of the interference covariance matrix introduced by the jammer and the generalized likelihood ratio test is derived. Performance analysis is conducted on simulated data and is aimed at highlighting the effectiveness of this new approach
ERCC1-XPF endonuclease-positioned to cut
No full textTo counteract damage to our genomes, numerous endo-and exonucleases incise the DNA backbone to remove damaged and aberrant DNA structures. It is imperative that such incisions be very tightly controlled, as unwanted DNA breaks are a key source of genome instability. Two new papers in The EMBO Journal shed light on how the activity of one such nuclease-ERCC1-XPF, an enzyme involved in various DNA repair pathways-is regulated to perform incision in the vicinity of DNA interstrand crosslinks
Feature article: A survey on two-stage decision schemes for point-like targets in Gaussian interference
No full textIn recent years, the design of so-called tunable detectors has raised significant interest in the radar community. The class of tunable detectors has been shown to be an effective means to attack detection of mainlobe targets or rejection of coherent repeater interferers in the presence of clutter and/or possible noise-like in-terferers. Tunable detectors allow adjustment of the rate at which the probability of detection Pd decreases as the received signal departs from the nominal one. In this case, a mismatch between the nominal and the actual steering vector is present. We refer to the capability of rejecting or detecting signals as directivity. Existing architectures can be classified according to their directivity as follows [1]: ▸ Robust decision schemes provide good detection performance in the presence of echoes containing signal components not aligned with the nominal (transmitted) signal (as shown in Figure 1, where target returns lie on a direction that is not aligned with the antenna beam boresight). ▸ Selective decision schemes are capable of rejecting signals whose signature is unlikely to correspond to the signal of interest to avoid false alarm
Polarimetric Covariance Eigenvalues Classification in SAR Images
No full textThis letter proposes a novel technique for automatic classification of the dominant scattering mechanisms associated with the pixels of polarimetric SAR images. Focusing on the heterogeneous scenario wherein the polarimetric image pixels share the same covariance but different power levels, the original data are replaced by a maximal invariant statistic in order to remove the dependence on the scaling factors. Then, the classification problem is formulated as a multiple hypothesis test which is addressed by applying the model order selection rules. The performance analysis is conducted on both simulated and measured data and points out the effectiveness of the proposed approach
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
From academia to courtroom: Perception of and expectations from the legal translator's role
No full textThis paper aims at investigating the perception of legal translators in both academia and the professional environment, based on the findings of a survey carried out within the QUALETRA project and a study carried out at the University of Trieste on the role of translators in local criminal proceedings
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