In recent years, several studies have demonstrated that machine learning and deep systems can be very useful to accurately predict brain age. this work, we propose a novel approach based on complex networks using 1016 T1-weighted MRI scans (in the age range 7−64years). We introduce structural connectivity model of human brain: are divided in rectangular boxes Pearson's correlation is measured among them order obtain network model. Brain then characterized through few easy-to-interpret...

Abstract. The VLF/LF radio signals method for studying preseimic activity is applied to the Abruzzo earthquake (M=6.3, 6 April 2009). data collected by three receivers located in Moscow (Russia), Graz (Austria) and Bari (Italy) at about 3000 km, 1000 km 500 from epicenter were used. received Sardinia (20.27 kHz) Sicily (45.9 transmitters, both Italy, compared with those Iceland (37.5 kHz), Great Britain (19.58 Germany (23.4 transmitters. propagation paths of two Italian transmitters cross...

Diffusion tensor imaging (DTI) is a promising technique that provides insight into white matter microstructure integrity and it has greatly helped identifying regions affected by Alzheimer's disease (AD) in its early stages. DTI can therefore be valuable source of information when designing machine-learning strategies to discriminate between healthy control (HC) subjects, AD patients subjects with mild cognitive impairment (MCI). Nonetheless, several studies have reported so far conflicting...

Recent works have extensively investigated the possibility to predict brain aging from T1-weighted MRI scans. The main purposes of these studies are investigation subject-specific mechanisms and development accurate models for age prediction. Deviations between predicted chronological known occur in several neurodegenerative diseases; as a consequence, reaching higher levels prediction accuracy is paramount importance develop diagnostic tools. In this work, we propose novel complex network...

We apply a versatile numerical technique to establishing the existence of cavity solitons (CS) in semiconductor microresonator with bulk GaAs or multiple quantum well GaAs/AlGaAs as its active layer. Based on Newton method, our approach implies evaluation linearized operator describing deviations from exact stationary state. The eigenvalues this determine dynamical stability CS. A typical eigenspectrum contains zero eigenvalue which "neutral mode" CS is associated. Such neutral modes are...

Cavity solitons are stationary self-organized bright intensity peaks which form over a homogeneous background in the section of broad area radiation beams. They generated by shining writing/erasing laser pulse into nonlinear optical cavity, driven holding beam. The ability to control their location and motion introducing phase or amplitude gradients beam makes them interesting as mobile pixels for all-optical processing units. We show generation number cavity broad-area vertical...

Abstract. In the last years disturbances in VLF/LF radio signals related to seismic activity have been presented. The data were collected by receivers located on ground or satellites. ground-based research implies systematic collection a network of receivers. Since 2000 "Pacific VLF network", conducted Japanese researchers, has operation. During 2008 receiver was developed Italian factory Elettronika (Palo del Colle, Bari). is equipment working and LF bands. It can monitor 10 frequencies...

Signal processing and machine learning techniques are changing the clinical practice based on medical imaging from many perspectives. A major topic is related to (i) development of computer aided diagnosis systems provide clinicians with novel, non-invasive low-cost support-tools, (ii) new methodologies for analysis biomedical data finding disease biomarkers. Advancements have been recently achieved in context Alzheimer’s (AD) through use diffusion weighted (DWI) data. When combined...

Cavity solitons (CSs) are localized structures appearing as intensity peaks in the homogeneous background of field emitted by a nonlinear microresonator. We experimentally and theoretically study switch-on process cavity semiconductor amplifiers. The switching time has two contributions: lethargic lapse following application pulse characteristic buildup time. While latter is not significantly affected control parameters, former crucially depends on them. Optimization parameters leads to less...

Analysis and quantification of brain structural changes, using Magnetic Resonance Imaging (MRI), are increasingly used to define novel biomarkers pathologies, such as Alzheimer's disease (AD). Several studies have suggested that topological organization can reveal early signs AD. Here, we propose a model which captures both intra- inter-subject information within multiplex network approach. This localizes atrophy effects summarizes them with diagnostic score. On an independent test set, our...

We consider the paraxial model for a nonlinear resonator with saturable absorber beyond mean-field limit. For accessible parametric domains we observe total radiation confinement and formation of 3D localized bright structures. Different from freely propagating light bullets, here self-organization proceeds feedback, combined diffraction nonlinearity. Such ``cavity'' bullets can be independently excited erased by appropriate pulses, once created, they endlessly travel cavity round-trip.

In real-world networks, information from source to destination does not only flow along the shortest path connecting them, but can any alternative route. Communicability is a network metric that accounts for this issue and, especially in diffusion-like processes, provides reliable measure of ease communication between node pairs. Accordingly, communicability appears be promising highlighting disruption connectivity among brain regions, caused by white matter degeneration due Alzheimer's...

Echocardiography is a fundamental tool in cardiovascular diagnostics, providing radiation-free real-time assessments of cardiac function. However, its accuracy strongly depends on operator expertise, resulting inter-operator variability that affects diagnostic consistency. Recent advances artificial intelligence have enabled new applications for image classification and probe guidance, but these typically rely large datasets specialized hardware such as GPU-based or embedded accelerators,...

Abstract. On 6 April 2009 a strong (Mw=6.3) earthquake occurred in the Abruzzo region (central Italy). Since 1996, intensity of CLT (f=189 kHz, Sicily, Italy), MCO (f=216 France) and CZE (f=270 Czech Republic) broadcast signals has been collected with ten minutes sampling rate by receiver operating place located about 13 km far from epicenter. During March 2009, old was substituted new one able to measure, minute rate, five VLF LF radiated transmitters different zones Europe. The mentioned...

Robotized laser beam welding of closed-square-butt joints is sensitive to the positioning with respect joint since even a small offset may result in detrimental lack sidewall fusion. An evaluation system using photodiode aligned coaxial processing confirms ability detect variations process conditions, such as when there an evolution between and joint. Welding different robot trajectories operating both continuous pulsed mode provided data for this evaluation. The detection method uses...

The Coronavirus disease 2019 (COVID-19) pandemic has officially spread all over the world since beginning of 2020. Although huge efforts are addressed by scientists to shed light several questions raised novel SARS-CoV-2 virus, many aspects need be clarified, yet. In particular, studies have pointed out significant variations between countries in per-capita mortality. this work, we investigated association COVID-19 mortality with climate variables and air pollution throughout European using...

We analyze numerically the microscopic model formulated in a companion paper [J. Opt. Soc. Am. B16, 2083 (1999)] to describe an externally driven broad-area bulk GaAs microcavity. predict formation of patterns transverse profile output field. In particular, we find existence stable cavity solitons, which appear as self-organized light peaks embedded homogeneous background. study characteristics such structures and specifically possibility switching them on off at desired locations field...

The existence of localized structures, including so-called cavity solitons, in driven optical systems is discussed. In theory, they should exist only below the threshold a subcritical modulational instability, but experiment often appear spontaneously on parameter variation. addition nonlocal nonlinearity may resolve this discrepancy by tilting “snaking” bifurcation diagram characteristic such problems.

We consider a broad-area vertical microresonator with an active layer constituted by bulk GaAs driven external coherent homogeneous electromagnetic field, and we adopt microscopic model that describes the field carrier dynamics in quasi-equilibrium regime. The theory is developed within free-carrier approximation, some relevant effects, such as Urbach tail bandgap renormalization, which are taken into account phenomenological way. include description of paraxial diffraction diffusion. A...

Abstract. In February 2002, a receiver was put into operation at the Department of Physics Bari University (Southern Italy) to record VLF-LF radio signals. The intensity and phase signals transmitted by GB (f=16 kHz, United Kingdom), FR (f=20.9 France), GE (f=23.4 Germany), IC (f=37.5 Island) IT (f=54 Sicily, has been monitored with 5 s sampling rate. raw data averaged over 10 min, from 2002 April 2006, have analysed. Several decreases electric field duration some days were revealed,...

A system generating 1.8 GHz electromagnetic fields for bio-medical and behavioral study on laboratory animals was designed implemented.The is based a reverberation chamber.An input power up to 5 W can be sent an indoor transmitting antenna electric field strength (E) more than 90 V/m reached inside the chamber.The characterized at different powers measuring E in points by means of miniature sensor.Then, boxes with 300 cc physiological liquid were realized as simple phantoms simulating (rats)

In this paper, we investigate the connectivity alterations of subcortical brain network due to Alzheimer's disease (AD). Mostly, literature investigated AD abnormalities at whole level or cortex level, while very few studies focused on sub-network composed only by regions, especially using diffusion-weighted imaging (DWI) data. work, examine a mixed cohort including 46 healthy controls (HC) and 40 patients from Disease Neuroimaging Initiative (ADNI) data set. We reconstruct connectome...