Marina Carla Serio

Marina Carla Serio
Università degli Studi di Torino | UNITO · Department of Physics

Professor

About

68
Publications
17,181
Reads
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3,553
Citations
Citations since 2017
8 Research Items
1242 Citations
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2017201820192020202120222023050100150200
2017201820192020202120222023050100150200
2017201820192020202120222023050100150200

Publications

Publications (68)
Article
Full-text available
Purpose Digital or computerised eye charts are becoming standard in the examination of visual acuity. Each instrument allows the selection of different optotypes, presentation modalities, and crowding. The aim of this study was to examine the differences in visual acuity (VA) measurement using a digital eye chart, comparing different optotypes and...
Poster
Full-text available
Le cheratiti microbiche dovute all’uso improprio delle lenti a contatto (lac) rappresentano la causa più comune di cheratiti. A 49 persone con esiti di cheratite grave (infezione corneale con riduzione della prestazione visiva) è stato somministrato un questionario. Lo scopo del questionario era di indagare le abitudini degli utilizzatori e determi...
Conference Paper
Full-text available
This project, specifically designed for high school teaching purposes, is aimed at exploring the physical processes underlying the atmospheric phenomena and includes several important physical concepts. The project was proposed in two versions. The first one involved 5 high school students at the end of the fourth year, participating to a one-week...
Article
Full-text available
After the investigation on students' perception towards the laboratory activities, presented at GIREP-MPTL International Conference 2014 (Marocchi & Serio 2015), we conducted a new analysis concerning the aspects of support and enhancement of the teaching activity in laboratory. We investigate i) how students prepare the laboratory activities, ii)...
Conference Paper
Full-text available
After the investigation on students' perception towards the laboratory activities, presented at GIREP-MPEL International Conference 2014 (Marocchi, D., Serio, M., 2015), we conducted a new analysis concerning the aspects of support and enhancement of the teaching activity in laboratory. We investigate i) how students prepare the laboratory activiti...
Conference Paper
Full-text available
After the investigation on students’ perception towards the laboratory activities, presented at GIREP-MPTL International Conference 2014 (Marocchi, D. & Serio, M., 2015), we conducted a new analysis concerning the aspects of support and enhancement of the teaching activity in laboratory. We investigate i) how students prepare the laboratory activit...
Article
Full-text available
Some theoretical and numerical studies highlighted that the occurrence of rogue waves could increase in the presence of crossing sea. This sea state is characterized by the coexistence of two wave systems with different directions of propagations and is considered one of the most common causes of ship accidents in bad weather conditions. In particu...
Conference Paper
Full-text available
The perception students have towards laboratory activities has been analyzed on the basis of the results of a questionnaire. It has been examined a sample of 99 High School students and about 270 university students, the latter attending the three years of the Physics Bachelor degree course at the University of Turin. It has been considered interes...
Article
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We analyze the sea state conditions during which the accident of the cruise ship Louis Majesty took place. The ship was hit by a large wave that destroyed some windows at deck number five and caused two fatalities. Using the wave model (WAM), driven by the Consortium for Small-Scale Modelling (COSMO-ME) winds, we perform a detailed hindcast of the...
Article
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We study wind-driven surface wave data taken on an offshore platform in 16 m of water, about 20 km from Venice in the Northern Adriatic Sea. The data are investigated for the effects of chaos and to this end they are subjected to a variety of time series analysis techniques from the field of dynamical systems theory. For certain data sets we find a...
Article
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We present an experimental and numerical investigation on the statistical properties of the surface elevation in crossing sea conditions. Experiments are performed in a very large wave basin (70 m × 50 m × 3 m) and numerical results are obtained using a higher order method for solving the Euler equations. Both experimental and numerical results ind...
Article
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A wave basin experiment has been performed in the MARINTEK laboratories, in one of the largest existing three-dimensional wave tanks in the world. The aim of the experiment is to investigate the effects of directional energy distribution on the statistical properties of surface gravity waves. Different degrees of directionality have been considered...
Article
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We discuss two independent, large scale experiments performed in two wave basins of different dimensions in which the statistics of the surface wave elevation are addressed. Both facilities are equipped with a wave maker capable of generating waves with prescribed frequency and directional properties. The experimental results show that the probabil...
Article
Full-text available
A wave basin experiment has been performed in the MARIN-TEK laboratories, in one of the largest existing three-dimensional wave tanks in the world. The aim of the experiment has been to investigate the effects of directional energy distribution on the statistical properties of surface gravity waves. Different degrees of directionality have been con...
Article
Full-text available
Quasi-resonant four-wave interactions may influence the statistical properties of deep water long-crested surface gravity waves. As a consequence, the wave height exceedance probability can substantially deviate from the expected distribution obtained by assuming that waves are linear. Here the occurrence probability of extreme events recently deri...
Article
Full-text available
Recently two numerical spectral methods, based on the use of the Fast Fourier Transform algorithm, have been found to be useful for studying the statistical properties of a large number of interacting random waves: the first one is known as the Higher Order Spectral (HOS) method and the second is based on the computation of the dynamical equation a...
Article
We study sequences of times between successive arrivals of air showers detected in the EAS-TOP experiment (primary energy between 70 and 1000 TeV) in order to establish their nature, whether stochastic or chaotic.
Article
Full-text available
Here we discuss the statistical properties of the surface elevation for long crested waves characterized by Jonswap spectra with random phases. Experiments are performed in deep water conditions in one of the largest wave tank facilities in the world. We show that for long-crested waves and for large values of the Benjamin–Feir index, the second or...
Article
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Here we consider a simple weakly nonlinear model that describes the interaction of two-wave systems in deep water with two different directions of propagation. Under the hypothesis that both sea systems are narrow banded, we derive from the Zakharov equation two coupled nonlinear Schrödinger equations. Given a single unstable plane wave, here we sh...
Article
Full-text available
Recently it has been shown theoretically, numerically and experimentally that the statistical properties (probability density function of wave amplitude and wave height) of long crested surface gravity waves depend not only on steepness but also on the Benjamin-Feir Index (BFI), which is the ratio between wave steepness and spectral bandwidth. The...
Article
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We study random, long-crested surface gravity waves in the laboratory environment. Starting with wave spectra characterized by random phases we consider the development of the modulational instability and the consequent formation of large amplitude waves. We address both dynamical and statistical interpretations of the experimental data. While it i...
Article
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Here we discuss some issues concerning the statistical properties of ocean surface waves. We show that, using the approach of weak turbulence theory, deviations from Gaussian statistics can be naturally included. In particular we discuss the role of bound and free modes for the determination of the statistical properties of the surface elevation. G...
Article
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We study random surface gravity wave fields and address the formation of large-amplitude waves in a laboratory environment. Experiments are performed in one of the largest wave tank facilities in the world. We present experimental evidence that the tail of the probability density function for wave height strongly depends on the Benjamin-Feir index...
Article
Full-text available
We compare the statistical properties of long crested sur-face gravity waves recorded in a long wave tank with numerical results obtained from a modified kinetic equation derived from the Dysthe equa-tion. We find experimentally and theoretically that the statistical prop-erties of the surface elevation depend on the ratio between the steepness and...
Article
Full-text available
We discuss the formation of large amplitude waves for sea states characterized by JONSWAP spectra with random phases. In this context we discuss experimental results performed in one of the largest wave tank facilities in the world. We present experimental evidence that the tail of the cumulative probability function of the wave heights for random...
Article
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We study the nonlinear interaction of waves propagating in the same direction in shallow water characterized by a double-peaked power spectrum. The starting point is the prototypical equation for weakly nonlinear unidirectional waves in shallow water, i.e., the Korteweg-de Vries equation. In the framework of envelope equations, using a multiple-sca...
Article
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We study the modulational instability in surface gravity waves with random phase spectra. Starting from the nonlinear Schrödinger equation and using the Wigner-Moyal transform, we study the stability of the narrow-banded approximation of a typical wind-wave spectrum, i.e., the JONSWAP spectrum. By performing numerical simulations of the nonlinear S...
Article
We study the spontaneous emission and formation of rogue hole states in shallow water ocean waves. Long wave components in the sea state, normally generated by shoaling effects as waves propagate in from deep water, can spontaneously disintegrate into negatively displaced holes in the wave field. Although apparently rare, these negative states form...
Article
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We discuss fundamental instabilities that may occur between two quasi-monochromatic interacting wave-trains. For the case of deep water we derive from the Zakharov equation a system of coupled NLS equation (CNLS). In shallow water the CNLS equation is also derived from the KdV equation. We then study the stability of a bimodal discrete spectrum. In...
Article
We study the nonlinear dynamics of unstable modes in the nonlinear Schroedinger equation (NLS). These modes have been identified with certain types of rogue waves which may occur in deep water wave trains and are here studied as a basic spectral component in the inverse scattering transform (IST) of NLS for periodic boundary conditions. Perspective...
Article
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We study the long-time evolution of deep-water ocean surface waves in order to better understand the behavior of the nonlinear interaction processes that need to be accurately predicted in numerical models of wind-generated ocean surface waves. Of particular interest are those nonlinear interactions which are predicted by weak turbulence theory to...
Article
Recently the Benjamin-Feir instability has been considered as a possible mechanism for the formation of freak waves. Today the most used models for wave forecasting are based on the nonlinear energy transfer process that is ruled by the kinetic wave equa- tion which has been derived independently by K. Hasselmann and by V. Zakharov . The theory is...
Article
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Freak waves are very large, rare events in a random ocean wave train. Here we study their generation in a random sea state characterized by the Joint North Sea Wave Project spectrum. We assume, to cubic order in nonlinearity, that the wave dynamics are governed by the nonlinear Schrödinger (NLS) equation. We show from extensive numerical simulation...
Article
Full-text available
We discuss the effects of the directional spreading on the occurrence of extreme wave events. We numerically integrate the envelope equation recently proposed by Trulsen et al., Phys of Fluids 2000, as a weakly nonlinear model for realistic oceanic gravity waves.Initial conditions for numerical simulations are characterized by the spatial JONSWAP p...
Article
Full-text available
Freak waves are very large, rare events in a random ocean wave train. Here we study the numerical generation of freak waves in a random sea state characterized by the JONSWAP power spectrum. We assume, to cubic order in nonlineariry, that the wave dynamics are governed by the nonlinear Schroedinger (NLS) equation. We identify two parameters in the...
Article
Rogue waves are rare “giant”, “freak”, “monster” or “steep wave” events in nonlinear deep water gravity waves which occasionally rise up to surprising heights above the background wave field. Holes are deep troughs which occur before and/or after the largest rogue crests. The dynamical behavior of these giant waves is here addressed as solutions of...
Article
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We present some preliminary results on the probability density functions of the increments of air transmittency time series which confirm the presence of small scale intermittency, previously observed with multifractal and wavelet methods. A relation to simultaneous measurements on wind intensity is also established.
Article
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We analyze shallow-water surface wave data from the Adriatic Sea using a nonlinear generalization of Fourier analysis based upon the periodic inverse scattering transform in the θ-function representation for the Korteweg-de Vries (KdV) equation. While linear Fourier analysis superposes sine waves, the nonlinear Fourier approach superposes cnoidal w...
Article
Full-text available
Shallow water waves are studied using a nonlinear wave equation (W2) derived from Euler's equations by Whitham's method: W2 is the Korteweg-de Vries (KdV) equation plus higher-order correction terms. By projecting numerical simulations of W2 onto the soliton and radiation modes of the inverse scattering transform for the KdV equation we (i) general...
Article
The fluctuations of air transmittency over small time scales (20-500 s), in the presence and the absence of fog, are analyzed from different points of view: Fourier and wavelet transforms, multiscaling exponents, the multifractal spectrum and structure functions. All results indicate a multifractal structure associated with intermittency, and whose...
Article
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We outline here the logical flow of papers that attack the problem of estimating the wave conditions in front of and at the Venetian littoral. We start from the determination of the wind fields, followed by that of the wave fields. The wave data are then transferred to the coast. We end by analysing the wave conditions inside the main inlet to the...
Article
The search for low-dimensional chaos in ocean surface waves is nowadays a very active field. The interpretation of the results, however, is not always straightforward. The issue addressed in this paper is how time series analysis tools from dynamical systems theory behave for a class of Gaussian processes often used in the study of ocean surface wa...
Article
Full-text available
We study nonlinear interactions in measured surface wave trains obtained in the Northern Adriatic Sea about 16 kilometres from Venice, Italy.Nonlinear Fourier analysis is discussed in terms of the exact spectral solution to the Korteweg-deVries (KdV) equation as given by theinverse scattering transform (IST). For the periodic and/or quasi-periodic...
Article
We report the results of four laboratory experiments on surface water waves generated with the Pierson-Moskowitz power spectrum, and characterized by different values of the ratiof p/f N and of the water depthh. The scope of the experiments was to test the dependence of the chaotic and fractal properties of the data on the parameterf p/f N, which h...
Article
This paper investigates the influence of high-frequency filtering the background white noise on the determination of the coloured-random-noise properties of cosmic-ray experimental signals. We consider fractal methods (Grassberger-Procaccia method, scaling exponent method and fractal length method) and statistical methods (comparison with the Gauss...
Article
Full-text available
This paper investigates the influence of background white noise on the determination of the colored random noise properties of cosmic ray experimental signals. We consider fractal methods (Grassberger and Procaccia method, scaling exponent method and fractal length method) and statistical methods (comparison with the Gaussian and Rice curves, and t...
Article
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This paper presents results obtained for the correlation dimension of cosmic ray muon time series detected at a depth underground of 570 hg/sq cm over a period of eight years. The corresponding galactic primaries have rigidities of the order of a few teravolts and are therefore at least partially under the influence of solar modulation effects. The...
Article
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We study the total carbonate profiles of three coastal cores extracted from the continental shelf in the Ionian Sea and of two deep-sea cores extracted from the Tyrrhenian abissal plane. An overall similarity between the two deep-sea profiles and among the three coastal profiles is observed, indicating the complete reproductibility of this type of...
Article
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This paper presents data on the sidereal variation of muons recorded at 570 hg/cm 2, corresponding to primary rigidities around 1.8 TV. The record investigated covers a period of five years, from September 1985, near solar minimum, to September 1990, near solar maximum. The features of the observed sidereal variation histogram are related to the ch...
Article
We analyze here the time record of total carbonate carried as CaCO 3 in a sea-bottom core from the Ionian Sea. Several major periods appear, most strongly at 1100, 690, 500, 340, 250 and 90 yr, confirmed both in the periodogram and maximum entropy estimates. The Gleissberg period appears in common with the 14 C and other records, such as the sunspo...
Article
Full-text available
Results are presented on analyses of the intensity variations of underground muons originated by primary cosmic rays with mean rigidity about 1800 GV, using data collected at a vertical depth of 570 hg/sq cm. The results of the analysis indicate that the cosmic ray primaries, during their stay in the heliosphere, are affected in different ways by t...
Article
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The markers of well-known historical eruptions in the Vesuvius area are recognized (Pompei, AD 79, Pollena, AD 472, Ischia, AD 1301), providing a precise dating which accurately tunes that obtained by the radiometric method. Three periodic components at about 206 yr, 228 yr and 179 yr may now be resolved in the carbonate series, and in close agreem...
Article
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The CaCO3 profile of the core closely resembles the radiocarbon time series as deduced from tree ring data. The two records have a correlation coefficient of about 0.8 and show strikingly similar long-term variations. This result presumably follows from the fact that both systems take part in the carbon cycle. Since the approximately 200 yr Δ14C wa...
Article
The thermoluminescence (TL) profile of the GT14 Ionian Sea core has been recently analyzed in connection with other records of solar activity. Phenomenological similarities among the TL profile, the radiocarbon record in tree-rings and the variations of the mean anuual sunspot number R z suggest a solar control of the TL signal. In this paper we co...
Article
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The particle orbits obtained by integrating the velocity field of the Eulerian Korteweg-deVries (KdV) equation and the trajectories given by the Lagrangian KdV equation are contrasted. It is shown that the two classes of orbits, while apparently equivalent, may be quite different. In particular, a spurious wave drift is generated by integrating the...
Article
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The authors briefly discuss how the thermoluminescence (TL) profile of a young marine sediment provides phenomenological information on the changes in the environmental conditions in the past 18 centuries. The main periodicities present in the TL profile are studied and the similarities between the TL variations and the fluctuations in the contempo...
Article
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The fractal and statistical properties of underground muons recorded at 570 hg/sq cm and their response to solar activity variations in the second part of solar cycle 21 are studied. A constant feature detected throughout the whole period considered is the self-affine nature of the underground muon fluctuations which display a scaling range extendi...
Article
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The calcium carbonate (CaCOâ) profile of a recent sediment core, drilled in the Ionian Sea in 1979, is studied. The CaCOâ content of the sediment has been measured at regularly spaced intervals of Îd=0.25 cm corresponding to Ît=3.87 yr from AD 170 to the present. The CaCOâ profile of the core closely resembles the radiocarbon time series as deduced...
Article
Full-text available
The Nonlinear Schroedinger Equation (NLS) and higher or-der corrections (Dysthe equation) in the envelope-equation hierarchy are considered as simple models for explaining the generation of freak waves in 1+1 dimensions. We discuss a simple analytical formula that predicts the maximum wave amplitude as a function of wave steepness and num-ber of wa...
Article
Full-text available
Unidirectional deep-water waves are studied theoretically and ex-perimentally. Theoretically we apply the theory of the nonlinear Schroedinger equation (NLS) using the inverse scattering transform, a kind of generalized, nonlinear Fourier analysis. We discover from the theoretical study that there are essentially four kinds of physical effects that...

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