Lying in the medicolegal field: Malingering and psychodiagnostic assessment

The simulation of mental illness, so-called “Malingering”, is a very difficult phenomenon for professionals to identify when making an assessment, especially in the medicolegal and forensic psychology and psychiatry fields. When malingering, the subject implements strategies that mimic the symptoms related to a possible psychiatric disease, with the aim of misleading the operator. It is necessary, therefore, to elicit a complete medical history and make a close clinical examination and, especially, to be able to rely on appropriate diagnostic tools. Another important aspect, in the legal medicine, and forensic psychology and psychiatry fields, is the opposite strategy, namely that of dissimulating, or masking, a disease.Several diagnostic tools that the professional clinician can employ to identify dissembling strategies are considered in this article, namely the MMPI- 2, PAI, M- Fast, the SIRS and, finally, the SIMS. Clin Ter 2019; 170(2):e134-141. doi: 10.7417/CT.2019.212

Unveiling radio halos in galaxy clusters in the LOFAR era

Giant radio halos are mega-parsec scale synchrotron sources detected in a fraction of massive and merging galaxy clusters. Radio halos provide one of the most important pieces of evidence for non-thermal components in large scale structure. Statistics of their properties can be used to discriminate among various models for their origin. Therefore, theoretical predictions of the occurrence of radio halos are important as several new radio telescopes are about to begin to survey the sky at low frequencies with unprecedented sensitivity. In this paper we carry out Monte Carlo simulations to model the formation and evolution of radio halos in a cosmological framework. We extend previous works on the statistical properties of radio halos in the context of the turbulent re-acceleration model. First we compute the fraction of galaxy clusters that show radio halos and derive the luminosity function of radio halos. Then, we derive differential and integrated number count distributions of radio halos at low radio frequencies with the main goal to explore the potential of the upcoming LOFAR surveys. By restricting to the case of clusters at redshifts <0.6, we find that the planned LOFAR all sky survey at 120 MHz is expected to detect about 350 giant radio halos. About half of these halos have spectral indices larger than 1.9 and substantially brighten at lower frequencies. If detected they will allow for a confirmation that turbulence accelerates the emitting particles. We expect that also commissioning surveys, such as MSSS, have the potential to detect about 60 radio halos in clusters of the ROSAT Brightest Cluster Sample and its extension (eBCS). These surveys will allow us to constrain how the rate of formation of radio halos in these clusters depends on cluster mass.Comment: 12 pages, 12 figures, accepted for publication in Astronomy and Astrophysic

Space charge effects in a vacuum thermionic diode

Temperature effects on thermionic diode with space charge model including emitter and accumulator electrode emission

Pressure measuring systems for closed cycle liquid metal facilities Ninth quarterly report, Mar. 1 - May 31, 1966

Thermionic diode pressure transducer for liquid metal application

Pressure measuring systems for closed cycle liquid metal facilities fifth quarterly report, 1 mar. - 31 may 1965

Pressure transducer system with thermionic diode sensor for closed cycle liquid metal applicatio

Pressure measuring systems for closed cycle liquid metal facilities Eighth quarterly report, 1 Dec. 1965 - 28 Feb. 1966

Thermionic diode pressure transducer for liquid metal applications and thermionic sensor desig

Pressure measuring systems for closed cycle liquid metal facilities Seventh quarterly report, 1 Sep. - 30 Nov. 1965

Thermionic diode pressure transducer for closed cycle liquid metal application

Pressure measuring systems for closed cycle liquid metal facilities Final report

Thermionic diode pressure sensor for liquid, vapor, and two phase potassium flow measurements at high temperature

Pressure measuring systems for closed cycle liquid metal facilities fourth quarterly report, 1 dec. 1964 - 28 feb. 1965

Pressure transducer system for liquid metal applications - fabrication of test pressure capsules, and deflection tests using optical measurement techniqu

First evidence of diffuse ultra-steep-spectrum radio emission surrounding the cool core of a cluster

Diffuse synchrotron radio emission from cosmic-ray electrons is observed at the center of a number of galaxy clusters. These sources can be classified either as giant radio halos, which occur in merging clusters, or as mini halos, which are found only in cool-core clusters. In this paper, we present the first discovery of a cool-core cluster with an associated mini halo that also shows ultra-steep-spectrum emission extending well beyond the core that resembles radio halo emission. The large-scale component is discovered thanks to LOFAR observations at 144 MHz. We also analyse GMRT observations at 610 MHz to characterise the spectrum of the radio emission. An X-ray analysis reveals that the cluster is slightly disturbed, and we suggest that the steep-spectrum radio emission outside the core could be produced by a minor merger that powers electron re-acceleration without disrupting the cool core. This discovery suggests that, under particular circumstances, both a mini and giant halo could co-exist in a single cluster, opening new perspectives for particle acceleration mechanisms in galaxy clusters