This Special Issue of Mathematics and Computers in Simulation collects a selection of peer-reviewed original articles on research topics developed in connection with IMACS2023, the IMACS World Congress, held in Rome (Italy) at the Faculty of Engineering, Sapienza University of Rome on September 11 - 15, 2023, that we organized, in the role of Local Scientific Committee, together with Rosa Maria Spitaleri, Congress Chair.

In this editorial the historical premises of the world Congress IMACS2023 are delineated in order to appreciate the development of IMACS as a scientific association keeping up with the ultimate scientific aspirations of society in the fields of Applied Mathematics and Scientific Computing. The World Congress, IMACS2023, the last considered step, celebrates successfully such a prestigious story.

This booklet contains all the abstracts of the results which are going to be presented at the IMACS World Congress taking place in Rome at theEngineering Faculty of University 'La Sapienza', September 11-15, 2023.This is the 21st one in a series of World Conferences whose complete list goes back to 1955 and covered the whole continents. The subsequent World Conferences, usually, take place every three years. Unfortunately, due to the COVID pandemics, IMACS2023, initially scheduled in 2020, had to be postponed also in order to follow the spirit of the IMACS World Conference which prescribes to gather scientists in presence from all over the world. So, in the present occasion, the whole participants are expected to convene in Rome for exchanging their works, ideas and experiences.This Book of Abstracts, reflecting the Congress structure, is organized in sections: Keynote Lectures, General Session, Mini-symposia, Special Sessions and Posters. According to the IMACS philosophy, different aspects of applied mathematics are represented with a special interest towards the numerical methods and solutions.

This Special Issue collects peer-reviewed original articles dealing with further developments of research results presented at MASCOT2018, the 15th IMACS/ISGG International Workshop. This one is the last edition in time of the MASCOT series of meetings, yearly organized since 2001 under the auspices of the Istituto per le Applicazioni del Calcolo (IAC) of the Consiglio Nazionale delle Ricerche (CNR), the principal organizer and co-sponsor. For a straightforward browsing of the Issue Contents all the articles are shortly introduced according to the following thematic Sections: Mathematical modeling in thermodynamics, Numerical methods for approximation, Numerical solution of partial differential equations, Data and signal processing, Subdivision schemes. Main advancements are delineated.

This Special Issue collects peer-reviewed original articles dealing with further developments of research results presented at MASCOT2018, the 15th IMACS/ISGG International Workshop. This one is the last edition in time of the MASCOT series of meetings, yearly organized since 2001 under the auspices of the Istituto per le Applicazioni del Calcolo (IAC) of the Consiglio Nazionale delle Ricerche (CNR), the principal organizer and co-sponsor.

The IMACS Series in Computational and Applied Mathematics collects refereed papers on research results presented in scientific events held under the auspices of the International Association for Mathematics and Computers in Simulation (IMACS). The MASCOT2018 Proceedings Book refers to the 15th IMACS/ISGG International Workshop of the MASCOT series of meetings which is yearly organised since 2001. The latest MASCOT 2018, 15th Meeting on Applied Scientific Computing and Tools, Grid Generation, Approximation and Visualization, dealt with mathematical modelling, methodologies and advanced applications, which are the themes of the contributions here collected.

MASCOT2018 is the 15th edition of the IMACS/ISGG workshop focused on methods and tools for the complete cycle of numerical modelling and simulation, from the development of theoretically well based models and methods to the deep investigation of crucial applications, from geometry and model construction to its implementation, from data analysis and powerful design of computational tools, with advanced capabilities. Aim of the workshop is the presentation and discussion of innovative technologies dealing with all aspects of computational processes. We recall, but without limiting to them, methodologies for effective grid generation, advanced approximation methods, identification and application of efficient PDE numerical solution algorithms, the development of powerful tools for image processing and scientific visualization. The workshop would bring together developers and users of computational methods and software tools to go deeper into advantages of new methodologies, discuss applications and results, illustrate educational approaches, identify new needs and innovative development directions in a growing variety of problems in applied mathematics

Prefazione al numero speciale della rivista dedicato agli articoli selezionati successivi al workshop MASCOT2015

volume speciale dedicato ad articoli selezionati e risultanti dal workshop MASCOT2015

Book of proceedings of the workshop MASCOT 2015, 14th Meeting on Applied Scientific Computing and Tools, held in Rome on June 9 - 12, 2015, at IAC (CNR). The program of the meeting, in each presentations, and the contents of this volume, in each paper, show advanced expertise matured in several countries, both in west and east Europe and overseas, all speakers and authors coming from high qualified universities and research centers. The large spectrum of topics approached by the applied scientific computing works deals with numer- ical methods and computational tools (i.e. approximation theory, grid genera- tion, unstructured grids, ...) for modelling a variety of fundamental problems, approximate and simulate important applicative problems in: fluid dynamics, granular materials and materials with memory, chemotaxis, crowd dynamics, environmental problems, urban heat islands, grinding wheels, imaging, image segmentation and data analysis. Raccolta degli atti del workshop internazionale MASCOT 2015, 14th Meeting on Applied Scientific Computing and Tools, tenutosi a Roma nel periodo 9 - 12 giugno 2015 presso l'IAC (CNR).

The segmentation of speckled images, as the synthetic aperture radar (SAR) images, is usually recognized as a very complex problem, because of the speckle, multiplicative noise, which produces granular images. In segmentation problems, based on level set method, the evolution of the curve is determined by a speed function, which is fundamental to achieve a good segmentation. In this paper we propose a study of the new speed function obtained by the linear combination of image average intensity and image gradient speed functions. Thus the aim is tuning the combined speed in the segmentation process. We segmented synthetic images by tuning parameters of the new speed function and we evaluated the best computed results. Then we applied this experimental setup to real SAR images, which are PRecision Images, acquired during European Remote Sensing mission, and a Cosmo-SkyMed image. In particular, we are interested in monitoring complex areas with low light covered by clouds, as coastlines and polar regions may be. In Earth Observation, the acquisition of SAR data becomes fundamental, since the SAR sensor can work in the night/day and in all weather conditions.

In document image analysis the task of segmenting images of ancient printed documents in distinct elements is known to be a very complex problem. In general, these documents are of low quality and can present skew and degradations because of old printing or ink stains. To face these problems we will show and discuss the validity of the Mumford and Shah variational method, based on the ? convergence theory, along with its numerical handling. In particular, we segment and extract the interest regions, constituted by textual and non-textual blocks, from page images of ancient books, combining the variational approach with morphological operations. Study case is the first edition of 'Scienza Nuova' (1725) of Giambattista Vico.