Advanced search in
Research products
arrow_drop_down
Searching FieldsTerms
Any field
arrow_drop_down
includes
arrow_drop_down
Include:
44 Research products, page 1 of 5

  • Publications
  • Research data
  • Open Access
  • Conference object
  • ES
  • Flore (Florence Research Repository)

10
arrow_drop_down
Date (most recent)
arrow_drop_down
  • Open Access
    Authors: 
    Biagini, Carlo; Bongini, Andrea; Ottobri, Paolo; Verdiani, Giorgio;
    Publisher: Universidad Politécnica de Cartagena
    Countries: Spain, Italy

    The implementation of BIM methodologies for historical buildings presupposes not only the collection of data and information related to its geometric configuration and to the technical parameters of its constituent elements, but more generally the identification of those semantic values which make it part of the historical-cultural heritage shared in a specific context. It is therefore essential that the modelling objectives are explicitly defined in relation to the specific BIM uses required, in order to avoid risks of over-modelling. This paper proposes a process of geometric validation of building information models of high morphological complexity implemented through Scan-to-BIM procedures. By means of a controlled and interoperable workflow, a chain of software applications is defined that is able to determine the level of geometric accuracy (LOA) of the information model with respect to the numerical model derived from the point cloud. Two case studies of H-BIM modelling of historical monumental complexes dating back to the Romanesque period in Sardinia (Italy) are illustrated: the churches of Sant'Efisio a Nora (Cagliari) and Santa Maria del Regno (Sassari). In the discussion of the results, the need for a prior definition of modelling strategies in relation to the expected BIM uses is highlighted. The digital survey was carried out as a part of the research project titled, “The Romanesque and the territory. Construction materials of the Sardegna Giudicale”, and coordinated by prof. Stefano Columbu. The BIM model was developed by a students’ team as part of the teaching activities of the Architectural Drawing course at the School of Engineering, University of Florence. The imagines are extracted from the drawings of the students, Valeria Siddi, Elena Pastorelli, Liuba Gabrielli, Simone Riccio, Elisa Ricotti.

  • Open Access English
    Authors: 
    Grazia Tucci; E. I. Parisi; Valentina Bonora; Lidia Fiorini; Alessandro Conti; M. Corongiu; Juan Ortiz-Sanz; Mariluz Gil-Docampo; T. Rego-Sanmartín; Marcos Arza-García;
    Publisher: Copernicus Publications
    Country: Italy

    Abstract. The democratization and accessibility of low-cost devices for image acquisition and the development of highly automated procedures for orientation and dense image matching allow almost every person to be a potential producer of photogrammetric models. The diffusion of image-based technologies to produce 3D models amongst wider audiences entails however some risks, as the lack of critical awareness of the final quality of the outputs. Information and education about potentialities and limitations of reality-based digitization by photogrammetry may help spreading procedures and methods for the correct use of this technology. This paper presents the results of one of the funded projects within the 2018 ISPRS Capacity Building Initiatives “Education and training resources on digital photogrammetry”. The production of multimedia material for supporting smart educational teaching and learning approaches will be reported, as well as experiences on their application on case studies. Blended innovative teaching and learning pedagogical approaches have been tested, as Flipped Classroom (FC), Learning-by-doing (LBD), Collaborative Learning (CL), and Challenge-Based Learning (CBL), supported by multimedia tools for capacity-building and knowledge transfer. The implementation of multimedia materials for supporting teaching strategies resulted in the production of updated and engaging resources, as videos, tutorials, and datasets to be used during courses, workshops, and seminars targeted to different user groups. The combination of teaching strategies and multimedia supporting materials were tested within national and international projects, from academic courses to complete non-experts, from activities on the field to online and distance learning.

  • Publication . Article . Conference object . Other literature type . 2020
    Open Access English
    Authors: 
    M. Crosetto; L. Solari; L. Solari; J. Balasis-Levinsen; N. Casagli; M. Frei; A. Oyen; D. A. Moldestad;
    Country: Italy

    Abstract. The Persistent Scatterer Interferometry is a powerful technique for ground motion detection and monitoring over wide areas. In the recent years, PSI has undergone a rapid evolution, largely thanks to the launch of the Copernicus Sentinel-1 constellation, the refinement of algorithms, and the increased computational capabilities. These factors allow for using Sentinel-1 interferometric data to develop ground deformation services for wide-area monitoring. Firstly, we review examples of services for national or regional deformation monitoring. The paper then describes the European Ground Motion Service (EGMS), part of the Copernicus Land Monitoring Service. The EGMS represents a unique initiative for performing ground deformation monitoring on a European scale.

  • Publication . Article . Conference object . Preprint . 2020
    Open Access English
    Authors: 
    Alessandra De Rosa; Cristian Vignali; Tamara Bogdanovic; Pedro R. Capelo; Maria Charisi; Massimo Dotti; Bernd Husemann; Elisabeta Lusso; Lucio Mayer; Zsolt Paragi; +20 more
    Publisher: HAL CCSD
    Countries: Italy, United Kingdom, Hungary, Hungary, Italy, United Kingdom, Spain, France, Spain, Italy ...
    Project: SNSF | Massive black holes as gr... (178949), NWO | Genes for Seed Quality (2300149325), EC | DIFERENS2 (609412), NSF | Collaborative Research: M... (1715661), EC | imbh (647208), NSF | NANOGrav Physics Frontier... (1430284), EC | B Massive (818691), SNSF | Massive black holes as gr... (178949), NWO | Genes for Seed Quality (2300149325), EC | DIFERENS2 (609412),...

    All authors acknowledge the hospitality of the Lorentz Center for international workshops (Leiden, The Netherlands), where the idea of this work was born, and acknowledge the support of the International Space Science Institute (ISSI Bern, Switzerland), where the collaboration was originated. We thank the reviewers for having provided valuable and constructive comments that improved the clarity of the manuscript, and J.E. Barnes, L. Blecha, M. Eracleous, B.D. Farris, H. Fu, X. Liu, R. Pfeifle, L.C. Popovic, C. Ricci, S. Rodriguez, S. Tang, G. B. Taylor for their kind permission to reuse figures from their publications. ADR, CV and SB acknowledge financial support from ASI under grant ASI-INAF I/037/12/0 , and from the agreement ASI-INAF n. 2017-14-H.O . TB acknowledges support by the National Aeronautics and Space Administration under Grant No. NNX15AK84G and 80NSSC19K0319 issued through the Astrophysics Theory Program and by the Research Corporation for Science Advancement through a Cottrell Scholar Award. SF and KÉG thank the Hungarian National Research, Development, and Innovation Office ( OTKA NN110333 ) for support. KÉG was supported by the János Bolyai Research Scholarship of the Hungarian Academy of Sciences and by the ÚNKP-19-4 New National Excellence Program of the Ministry for Innovation and Technology. BH acknowledges financial support by the DFG grant GE625/17-1 . EL is supported by a European Union COFUND/Durham Junior Research Fellowship (under EU grant agreement no. 609412). DL acknowledges support from the European Research Council (ERC) under grant 647208 (PI Jonker). AS is supported by the ERC CoG grant 818691 (B Massive). MGi is supported by the “Programa de Atracción de Talento” of the Comunidad de Madrid grant 2018-T1/TIC-11733 for the project: “Unveiling Black Hole Winds from Space”, and by the Spanish State Research Agency (AEI) grant MDM-2017-0737 Unidad de Excelencia “María de Maeztu” - Centro de Astrobiología (INTA-CSIC). PRC and LM acknowledge support from the Swiss National Science Foundation under the Grant 200020_178949 . MC acknowledges support from the National Science Foundation (NSF) NANOGrav Physics Frontier Center, award number 1430284 . NHR acknowledges support from the BMBF Verbundforschung under FKZ: 05A17PC1 and FKZ: 05A17PC2. ZH acknowledges support from NASA grants NNX17AL82G and 80NSSC19K0149 and NSF grant 1715661 . KI acknowledges support by the Spanish MINECO under grant AYA2016-76012-C3-1-P and MDM-2014-0369 of ICCUB (Unidad de Excelencia ’María de Maeztu’). MPT acknowledges financial support from the Spanish MCIU through the “Center of Excellence Severo Ochoa” award for the Instituto de Astrofísica de Andalucía ( SEV-2017-0709 ) and through the MINECO grants AYA2012-38491-C02-02 and AYA2015-63939-C2-1-P . The quest for binary and dual supermassive black holes (SMBHs) at the dawn of the multi-messenger era is compelling. Detecting dual active galactic nuclei (AGN) -- active SMBHs at projected separations larger than several parsecs -- and binary AGN -- probing the scale where SMBHs are bound in a Keplerian binary -- is an observational challenge. The study of AGN pairs (either dual or binary) also represents an overarching theoretical problem in cosmology and astrophysics. The AGN triggering calls for detailed knowledge of the hydrodynamical conditions of gas in the imminent surroundings of the SMBHs and, at the same time, their duality calls for detailed knowledge on how galaxies assemble through major and minor mergers and grow fed by matter along the filaments of the cosmic web. This review describes the techniques used across the electromagnetic spectrum to detect dual and binary AGN candidates and proposes new avenues for their search. The current observational status is compared with the state-of-the-art numerical simulations and models for formation of dual and binary AGN. Binary SMBHs are among the loudest sources of gravitational waves (GWs) in the Universe. The search for a background of GWs at nHz frequencies from inspiralling SMBHs at low redshifts, and the direct detection of signals from their coalescence by the Laser Interferometer Space Antenna in the next decade, make this a theme of major interest for multi-messenger astrophysics. This review discusses the future facilities and observational strategies that are likely to significantly advance this fascinating field.© 2020 Elsevier B.V. 69 pages, 21 figures. Accepted for publication in New Astronomy Reviews © 2020 Elsevier B.V.

  • Publication . Other literature type . Article . Conference object . 2020
    Open Access English
    Authors: 
    Juan Ortiz-Sanz; Mariluz Gil-Docampo; T. Rego-Sanmartín; Marcos Arza-García; Grazia Tucci; E. I. Parisi; Valentina Bonora; Francesco Mugnai;
    Countries: Spain, Italy

    Abstract. The advent of the smartphones brought with them higher processing capabilities and improved camera specifications which boosted the applications of mobile-based imagery in a range of domains. One of them is the 3-D reconstruction of objects by means of photogrammetry, which now enjoys great popularity. This fact brings potential opportunities to develop educational procedures in high schools using smartphone-based 3-D scanning techniques. On this basis, we designed a Project Based e-Learning (PBeL) initiative to introduce secondary students to the disciplines of photogrammetry through the use of their mobile phones in an attractive and challenging way for them. The paper describes the motivation behind the project "D3MOBILE Metrology World League”, supported by ISPRS as part of the "Educational and Capacity Building Initiative 2020" programme. With this Science, Technology, Engineering and Mathematics (STEM) initiative, we implement a methodology with the format of an international competition, that can be adapted to daily classwork at the high school level anywhere in the world. Therefore, the championship is essentially structured around a collection of well-thought-out e-learning materials (text guidelines, video tutorials, proposed exercises, etc.), providing a more flexible access to content and instruction at any time and from any place. The methodology allows students to gain spatial skills and to practice other transversal abilities, learn the basics of photogrammetric techniques and workflows, gain experience in the 3-D modelling of simple objects and practice a range of techniques related to the science of measurement.

  • Publication . Other literature type . Conference object . Part of book or chapter of book . 2020
    Open Access
    Authors: 
    Stefano Bertocci; Matteo Bigongiari;
    Publisher: Universidad de Granada, Universitat Politècnica de València, Patronato de la Alhambra y Generalife
    Countries: Italy, Spain, Italy

    [EN] This paper deals with the documentation and digital survey of fortifications in the historic city of Piombino. During the Renaissance the fortified perimeter of the city was considerably enlarged, both because of the will of the Lords of Piombino, the Appiani, to build a fortified citadel, deeming the previous urban palace inadequate for the ruling family, and to improve the defenses by land with the construction of a rivellino in front of the north door and of a fortress to the east. The defenses, conquered by Valentino’s troops in 1502, were redesigned by Leonardo da Vinci, as documented in the pages of Code II of Madrid, which contains drawings and calculations for the construction of the works. The present project, started in April 2018, plans to carry out an accurate digital survey of fortifications, in order to provide the basis for graphic documentation on which to base further cognitive investigations, from archaeological ones to diagnostic ones. The survey operations were carried out with today’s digital technologies, laser scanners and cameras, creating reliable point clouds and three-dimensional models mapped with texture, from which to extract 2D drawings. The study of the sources, of the texts of Leonardo’s scholars and accurate archaeological investigations will provide the opportunity to further analyze Leonardo’s intervention on the still existing structures.

  • Open Access
    Authors: 
    Sandro Parrinello; Francesca Picchio; Anna Dell'Amico; Chiara Malusardi;
    Publisher: Universitat Politàcnica de València
    Countries: Italy, Italy, Spain

    The walls of Cartagena de Indias through methodological experimentation and survey systems protocols. Digital tools comparison for the study of the Antonelli’s defense systemCartagena de Indias, one of the main Spanish commercial ports in the Caribbean Sea, was strategically built on a system of islands and peninsulas that formed a lacustrine system along the coast of Tierra Firme, known today as Colombia. For several centuries, Cartagena fortifications have been at the fore-front of Spanish military technologies. This site became the scene of action of the main military engineers at the service of the Spanish crown. In 1586 Battista Antonelli received from King Philipe II the task to design this monumental defensive system. The first project for the Cartagena wall enclosure (1595) is due to Battista and it was continued and modified by his nephew Cristoforo Roda. Nowadays, Antonelli walls still fit into the urban fabric of the city and delineate the perimeter of the historic city. The research project follows the previous research experiments conducted by the Lab DAda-LAB of the University of Pavia in the territory of Panama for the study of the Antonelli fortifications systems of Portobello and San Lorenzo del Chagres. It concerned an extensive action aimed at the documentation and to the study of the entire fortified system of the historic center of Cartagena. The perimeter walls of the old city and the fort of San Felipe de Barajas have been documented through the use of a mobile laser scanner that uses SLAM technology, evaluating the most effective performed strategies for fast survey activities. In parallel, a more specific action was conducted on the portion of the Baluarte of Santa Catalina walls, where it was possible to give a comparison between different methods and instruments, in order to verify the reliability of the 3D databases. Analysis protocols have been developed for the documentation and study of the defensive system. The paper will highlight the construction technologies that qualify the fortresses of Cartagena de Indias and the results obtained by the comparison between different data acquisition technologies to evaluate the quality of the models for the development of documentation strategies for heritage enhancement and protection.

  • Publication . Other literature type . Part of book or chapter of book . Conference object . 2020
    Open Access
    Authors: 
    Stefano Bertocci; Giovanni Pancani; Anastasia Cottini;
    Publisher: Universidad de Granada, Universitat Politècnica de València, Patronato de la Alhambra y Generalife
    Countries: Italy, Italy, Spain

    The city wall of Lastra a Signa: integrated digital survey methodologiesThe survey of the Lastra a Signa city walls (built between the second half of 1300 and the first half of 1400) is the result of three different survey campaigns made in 2006-2007-2008 and of the following data processing carried out as part of a Master thesis. It is a paradigmatic example of the overcoming of the concept of “survey as a mere measurement and graphic representation of a certain element”, by using a methodology protocol. At that time, survey operations became more complex because it was necessary to coordinate with a scientific basis the different survey phases: preliminary documentation, data taking with several instruments, data processing, data filing and cataloguing, two-dimensional representation of plans, cross-sections and elevations, wall decay interpretation and building materials analysis. The survey subject became a dynamic and ever-changing process, thanks to the introduction of digital survey and the availability of new technologies. This paper describes the methodologies that were used in each different part of the survey campaign, of the data cataloguing operations and of the representation process, underlining the importance of the strict hierarchy of the acquired and rendered data. This hierarchy allowed to manage information obtained from topographic, laser, direct and photographic survey, and then to discretise, clean, georeference and make two-dimensional representations of the acquired data. Ultimately, it allowed creating a database that contains all these elements and ensures that the archived data can be updated in the future.

  • Open Access
    Authors: 
    Lorenzo Berzi; Caterina Antonia Dattilo; Francesco Del Pero; Massimo Delogu; Manuel Ignacio Gonzalez;
    Publisher: Elsevier BV
    Country: Italy
    Project: EC | NEOHIRE (720838)

    Abstract The use of so called Rare Earth Elements (REEs) for the production of permanent magnets (PMs) is increasing worldwide due to the needs of numerous industrial sectors. REEs are described in literature as critical materials due to the uncertainties related to cost instability and due to the potential environmental and social impact associated to their production cycle. The NEOHIRE project aims at reducing the amount of critical materials installed on wind turbine generators, developing bonded magnets characterized by reduced use of REEs. The project includes the study of alternative alloys and of their specific production processes, the engineering of machines optimized for the characteristics of the newly developed magnets, the proposal of recycling processes tailored for different types of PM; life cycle analyses aimed to estimate environmental, economic and social impact are also performed to verify the sustainability of the proposed technology. This paper describes the results of the first phase of such life cycle assessment, which started with inventory definition. The steps for PM production have been characterized, identifying materials, energy use and substances used as input; sintered PMs are used as reference for a comparison with bonded PMs. The construction of the inventory has been done considering small scale processes performed during research activity, which are characterized by a different specific energy consumption in relation to industrial-scale ones. Therefore, a thermal model for the assessment of the performances of scaled-up processes is proposed, being suitable for the estimation of energy consumption during heat-treatments. A provisional scenario for new bonded PMs production is then adopted for environmental impact assessment. Results, which have to be considered as preliminary, show the main relevance of various phases in determining the impact and a brief comparison with sintered PMs-based machines.

  • Open Access
    Authors: 
    Thomas, Jung; Leszek, Orlikowski; Beatrice, Henricot; Paloma, Abad-Campos; Aday, A. G.; Olga Aguín Casal,; Joszef, Bakonyi; Santa Olga Cacciola,; Thomas, Cech; Chavarriaga, D.; +52 more
    Publisher: Dipartimento di Agraria Università degli Studi di Sassari
    Country: Italy
Send a message
How can we help?
We usually respond in a few hours.