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Automatic object recognition using deep learning for legacy waste treatment
Get PDFJAEA is addressing the back-end issues with the steadfast promotion of sustainable measures. Research and development plans on the back-end are being rationally pursued by considering priorities based on indicators such as bottleneck issues in waste streams, relevance to WAC settings, and effectiveness of cost reduction. In addition, the future vision (JAEA 2050+) has been formulated to
promote cross-disciplinary research and development through a new approach that cannot be reached by conventional R&D methods, and active incorporation of information technologies, such as AI technologies. With regard to back-end issues, we are developing intelligent sensing that combines sensing and information processing technologies to realize automatic sorting technology, and non-destructive evaluation technology using high-energy X-ray CT for legacy wastes. The core technology common to all of these technologies is image evaluation technology using deep learning models, which was confirmed to perform very well in the evaluation of waste object recognition
Proposal of a compact VHEE-linac for FLASH radiotherapy
Get PDFThe present study regards the design of a Very High Electron Energy (VHEE) machine for use in radiotherapy to treat deep tumors in a FLASH regime. The proposed system includes a low energy, high current injector linac followed by high acceleration gradient structures capable of reaching 60–130 MeV energy range. We used the CST code to define the linac’s RF parameters and the codes TSTEP and ASTRA in beam dynamics simulations to optimize the accelerated current and the delivered dose. Preliminary results show a compact VHEE-linac system reaching a peak current of 200 mA, equivalent to 600 nC per pulse. The realization of the prototype for vacuum and brazing tests is ongoing to evaluate the strength and integrity of the joints and connections in the linac and to perform the low-power RF tests. The outcome of these tests helps to make any necessary design adjustments or improvements before developing the final structure
On a theory of the Antikythera Mechanism
Get PDFIn this paper we sketch some elements of a new reconstruction
of the theory underlying the design of the Antikythera Mechanism based on the mathematical knowledge available at the time of its construction
A didactic experiment to measure the angular correlation between
Get PDFA didactic experiment carried out by a group of Physics masters’ students at Bari University is presented. The purpose was the study of the angular correlation between the two gamma rays of 1.17 MeV and 1.33 MeV emitted in typical 60Co decays by means of two NaI(Tl) scintillators equipped with photomultiplier tubes read out by a digital oscilloscope. Several runs were performed with the Co
source at different angles between the two scintillators. Additional runs were performed removing the source, to study the backgrounds from cosmic rays and from gamma rays emitted by the radioactive isotopes 208Tl and 40K. Our results showed that the signal rate changes with the angular separation in agreement with the theoretical expectations by Hamilton dating back to 1940 and with recent measurements
documented in the literature. Students learned to plan and set up an experiment, to take data and to perform basic analysis. Care was taken to understand the limits of our experimental apparatus and possible improvements
Study of a B meson decay with X(3872) at the CMS experiment
Get PDFThis article is based on the talk I delivered on 16 September 2022,
in the “Sezione Giovani” of the 108th National Congress of the Italian Physical
Society, organized jointly with the Italian Association of Physics Students. A study of the exotic resonance X(3872) is presented, its production in the decay of neutral mesons is investigated using a sample of proton-proton collisions collected at Vs = 13 TeV with the CMS detector at the CERN LHC. This measurement, combined with analogue studies of the X(3872) production in charged B meson decays, can help to shed light on the puzzling nature of the X(3872) particle and in understanding QCD theory. The present analysis is currently under development and not yet approved by the CMS Collaboration
Dark Personality and police workers: analysis of an Italian sample
Get PDFThe Dark Triad of Personality consists of three negative and maladaptive traits: Machiavellianism, narcissism, and psychopathy. Although these traits are positively correlated, they represent distinct aspects of personality. On another note, a career in law enforcement is known to be particularly stressful, and the experiences in this profession can have an impact on an individual's personality. While psychopathy traits have been observed in police officers, less attention has been given to the other Dark Triad traits. The aim of this exploratory study is to investigate the Dark Triad traits in a sample of Italian police workers, categorized by age and years of service. We administered the Italian translation of the Short Dark Triad to the sample, which consisted of 121 Police Workers (experimental group) and 541 civilian individuals (control group). The collected data was analyzed using SPSS v25 software. An independent sample t-test was conducted to examine any differences in dark triad traits between police workers and civilian individuals. Additionally, a point-biserial correlation was used to explore any correlations between work-related dangerous experiences or exposure to violence scenes and dark triad traits in the experimental group. The results of the t-test indicate that the police workers sample had lower levels of both machiavellianism and psychopathy traits compared to civilian individuals, with no significant differences noted in the narcissism trait. Regarding police workers, the statistical results show a positive association between exposure to work-related violence scenes and the psychopathy trait. Furthermore, work-related dangerous experiences do not influence any of the dark triad traits
Gli attori del monitoraggio delle prigioni: tra indipendenza, formalità e rappresentazioni della pena
Get PDFParallelamente all’espansione dei tassi di carcerizzazione, nell’era del mass imprisonment, a livello globale si è assistito a una crescente attenzione al tema della tutela dei diritti delle persone detenute, sia da un punto di vista normativo, che attraverso un crescente coinvolgimento delle corti internazionali in questo ambito. In tale scenario, una pluralità di attività di monitoraggio delle condizioni di detenzione si stanno progressivamente consolidando. Dal punto di vista istituzionale, l’approvazione del Protocollo opzionale alla Convenzione delle Nazioni Unite contro la tortura (OPCAT) nel 2002 ha previsto che ciascuno stato si dotasse di un Meccanismo di Prevenzione Nazionale (NPM). In Italia tale ruolo è svolto dal Garante Nazionale, che rappresenta il principale attore istituzionale del monitoraggio delle carceri, insieme alla Magistratura di Sorveglianza, che ha, tra i suoi mandati, precisamente quello di vigilare sull’applicazione della legge nel contesto penitenziario. Accanto a tali ruoli istituzionali, figurano poi attori non istituzionali che osservano e descrivono le condizioni strutturali e il clima detentivo che possono contribuire alla violazione di diritti dentro al penitenziario.
Il presente contributo intende esplorare norme e prassi delle varie attività di monitoraggio, per riflettere su come diversi livelli di indipendenza, formalità e rappresentazioni sociali della pena e del penitenziario possano produrre effetti diversi in termini di tutela dei diritti delle persone detenute, con un focus particolare sulle rappresentazioni della violenza in carcere e degli strumenti per prevenirla e contrastarla
The SAND detector at the DUNE near site
Get PDFDUNE is a next-generation long baseline experiment for neutrino oscillation physics. The SAND detector at the Near Detector complex is designed to perform on-axis beam monitoring, constrain uncertainties in the oscillation analysis and perform precision neutrino physics measurements. SAND exploits a 0.6 T super conductive magnet, an electromagnetic calorimeter made of lead scintillating fibres, a 1-ton novel liquid argon detector (GRAIN) and a modular low-density straw tube target tracker system. In this article, the major components of the SAND detector
and their role in the measurements of ν/ν interactions are presented
Enhancing the response to ammonia and nitrogen dioxide of bare graphene through NiPc functionalization
Get PDFIn this work, in order to enhance the sensing capability of bare graphene, nickel phthalocyanine (NiPc) powder has been sublimated through a ther- mal evaporator in ultra-high vacuum, and deposited as a monolayer on a graphene on silicon carbide substrate. After characterization, the functionalized sample and a bare graphene layer have been settled on a properly designed platform, able to monitor the sensor response of both chemiresistors, allowing for a direct compar- ison of their performances under the same working condition. The results clearly demonstrate that the NiPc functionalization improves the response of bare graphene to ammonia and nitrogen dioxide by 40% and 30%, respectively, at 10 ppm concen- tration