1,721,664 research outputs found
Navigating the Freshwaters of Patagonia... and This Book
No full textA number of distinctive features characterise the Patagonian region, fromgeological history to present geography and climate, signed by the presence of the Andesridge. Patagonia can be thus best analysed from an eco-regional viewpoint, which hasbeen applied to terrestrial ecosystems as well as to freshwaters and, in Argentina,specifically to wetlands. If landscapes can be read as palimpsests on which successivemodifications have been produced by both natural and human forces, inland waterecosystems carry strong signals of such changes, which account for the characteristics ofthose in a more pristine status but also for those of heavily intervened and submitted tofast changes in land use in their catchments. Thus, in addition to the order in which thechapters of this book are presented, the manifold interactions between the biotic, abioticand anthropic spheres of the environment in Patagonia invite a number of differentpossible organisations of the reading, one of which we offer in this chapter, with the finalobjective of discussing the regional prospects of achieving the water-related goals of theUN 2030 Agenda for Sustainable Development.Fil: Mataloni, Maria Gabriela. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e Ingeniería Ambiental; ArgentinaFil: Quintana, Ruben Dario. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e Ingeniería Ambiental; Argentin
Integrated waveguide photonics circuits for quantum simulation and beyond (Conference Presentation)
No full textQuantum simulators are getting to the level of real devices, constituted by a quantum system which can be controlled in its preparation, evolution and measurement and whose dynamics can implement that of the target quantum system we want to simulate. In this context, photonics quantum technologies are expected to play an instrumental role in the realization of controlled quantum systems capable, in their evolution, to simulate a given complex system. I will present some of the main results obtained in this field in our laboratory by using integrated waveguide optical circuits that represent the hardware of a quantum simulator. These systems are constituted by interferometer arrays of beam splitters and phase shifters fabricated on single integrated platforms by femtosecond laser writing technique and have the potential of speeding-up the evolution from lab systems to the next generation of quantum optical devices for real-world applications. Using the mobility of photons we are able to create arbitrary interconnections within these systems and to mimic the main features of quantum phenomena of increasing complexity
Generation and Applications of n-Qubit Hyperentangled Photon States
No full textIn recent years, a number of theoretical and experimental demonstrations regarding the use of photonic entangled states based on many qubits, spanning a large size Hilbert space has been provided. The entanglement of two particles in more than one degree of freedom, namely hyperentanglement, is a useful technique which allows to take full advantage of the possibilities offered by quantum mechanics. Compared to multiphoton entangled states, hyperentangled states offer important advantages as far as purity and generation/detection rate are concerned. The present work is intended to survey the most relevant examples of hyperentangled multiqubit photon states aimed at the verification of fundamental tests of quantum mechanics and the realization of important quantum information protocols
Hippodonta lange-bertalotii Van de Vijver, Mataloni & Vinocur sp.nov. and related small-celled Hippodonta taxa
Full text linkHippodonta lange-bertalotii Van de Vijver, Mataloni & Vinocur sp. nov. is described from Crater Lake, Deception Island (South Shetland Islands). Present paper reports a detailed morphological description of this species by means of light and scanning electron microscopy. The main diagnostic criteria include the rhombic outline of the valves, the comparatively narrow striae and the presence of two shortened striae delimiting the central area. The adscription of this new species to the genus Hippodonta and the differences with related taxa are briefl y discussed. Additionally, the morphological variability of the similar H. pseudacceptata is examined analyzing the valvar ultrastructure of different populations collected from Western Europe or published in the literature. Hippodonta pumila is presented as a heterotypic synonym of H. pseudacceptata.Fil: Blanco, Saúl. Universidad de León; España. Public Research Centre – Gabriel Lippmann. Department of Environment and Agro-Biotechnologies; LuxemburgoFil: Van de Vijver, Bart. National Botanic Garden; BélgicaFil: Vinocur, Alicia Liliana. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental; ArgentinaFil: Mataloni, Maria Gabriela. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e Ingeniería Ambiental; ArgentinaFil: Gomá, Joan. Universidad de Barcelona; EspañaFil: Novais, María Helena. Universidade de Évora; PortugalFil: Ector, Luc. Public Research Centre – Gabriel Lippmann. Department of Environment and Agro-Biotechnologies; Luxemburg
Are wetlands freshwaters?
No full textLimnology and wetland ecology are intimately related because in both, wateris an essential factor. Despite this, wetlands are water-dependent ecosystems that areneither terrestrial nor aquatic ones. Unlike aquatic ecosystems, they have soils but theyalso have standing water, so they are not truly terrestrial. For this reason, somelimnologists have historically considered that wetlands were an object of study forterrestrial ecologists and viceversa. The International Convention on Wetlands itselfadopted an enumerative definition of wetlands that includes purely aquatic ecosystems,thus leading to further confusion around the wetland concept. Key environmentalfactors controlling wetlands include geomorphic setting, soil properties, fire frequency,hydroperiod, and water sources. In this context, Brinson´s functional wetlandclassification based on hydrogeomorphic aspects was used in the regionalisation ofArgentinean wetlands, which included a Patagonian region with three continentalwetland subregions: 1) Lakes, watercourses and mallines of the Patagonian Andes; 2)Lagunas and vegas of the extra-Andean Patagonia; and 3) Mallines and turberas ofAustral Patagonia and South Atlantic Islands. Wetlands of the Chilean Patagonia aresimilar to those of the Argentinean sector, though some peculiar wetland types such asñadis and cátricos are also found. Wetlands have been and continue to be part of manyhuman cultures in the world. These ecosystems are among the most important in theworld since they provide approximately 40% of all ecosystems contributions to people.Although these nature contributions to people are particularly important in Patagonia(e.g., freshwater sources, forage for livestock, carbon sinks, habitat for biodiversity,etc.) continental wetlands as well as aquatic ecosystems in this region are facing manythreats due to changes in land use associated with global change. Therefore, urge thenecessity of public politics focused on their conservation and sustainable use.Fil: Quintana, Ruben Dario. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e Ingeniería Ambiental; ArgentinaFil: Mataloni, Maria Gabriela. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e Ingeniería Ambiental; Argentin
Reaching out for the UNDP Sustainable Development Goals in Patagonia
No full textThe 2030 Agenda for Sustainable Development includes 17 Goals (SDGs) thatprovide a roadmap for joint action by world countries to fulfil human needs and expectations,with equity and with environmental sustainability. SDG 6 on Clean Water and Sanitation,directly focuses on freshwater, while others include different water and sanitation targets(SDG 3, 11, 12 and 15). In Patagonia, the true challenge to meet the SDGs is not related tothe availability of resources, which are plentiful, but to the wise use of them, which needs thebacking of relevant science and strong governance. We present our view of the state of the artof both fields in the region. Specifically, we analyse how Chile and Argentina are not doingvery well in implementing integrated water resource management (IWRM), a specific goalwithin the 2030 Agenda, thus indicating significant weaknesses in both science andgovernance. Both countries have been slow at developing ecosystem-level science and have atradition of natural resource management as a top-down, closed-door, and bureaucraticprocess. We analyse some of the underlying causes for these weaknesses and identifyopportunities for promoting more integrated, multidisciplinary research, based on theperspective of ecosystem services, which promotes an environmental view of water securityproblems within a socioecological framework; it also provides an ideal support forscience-based governance structures, with strong consultation mechanisms and theparticipation of multiple stakeholders, and able to deal with the uncertainties associated toecosystem level studies.Fil: Pascual, Miguel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico para el Estudio de los Ecosistemas Continentales; ArgentinaFil: Mataloni, Maria Gabriela. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e Ingeniería Ambiental; ArgentinaFil: Quintana, Ruben Dario. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e Ingeniería Ambiental; Argentin
Il rilievo della fortezza di Civitella del Tronto. Il contributo della Geomatica.
No full textIl contributo ripercorre le fasi delle operazioni di rilevamento, condotte nell'ambito di ricerche che hanno coinvolto aree disciplinari diverse sul borgo e sulla fortezza di Civitella del Tronto, svolte in un lungo arco temporale. La complessità e l'estensione dei luoghi e la varietà formale delle architetture civili e militari, hanno reso necessario l'utilizzo di diverse tecniche, strumenti e metodologie, per dare una risposta esauriente alle necessità del gruppo di studio di elaborati grafici di diversa natura e a scale differenti. Campagne di misura che hanno visto l'utilizzo di strumenti e tecniche della Topografia tradizionale, dei sistemi satellitari GNSS, della Fotogrammetria aerea e terrestre ed infine del Laser Scanning, sono state via via messe a sistema e georeferenziate in un unico sistema di riferimento, grazie all'impianto strutturale di base, che ha svolto la funzione di struttura portante, ha saputo tenere uniti correttamente i risultati dei vari dei rilevamenti, eseguiti in epoche diverse, con sensori attivi e passivi fino al più recente Laser scanning, introdotto per verificare i danni a seguito dei disastrosi eventi sismici del 2016
Santa Maria della neve. Laser scanning per la conservazione
No full textIl volume raccoglie le attività ed i risultati del workshop internazionale sul tema “Il rudere: ricostruzione vs conservazione?” svoltosi nel 2011 nell’ambito del programma di ricerca sottoscritto dall’Università “G. d’Annunzio” di Chieti-Pescara e l’Universitate de Arhitectura ̆ s ̧i Urbanism “Ion Mincu” di Bucarest, nonché i contributi che studiosi di diverse istituzioni, italiane e straniere, hanno voluto apportare al tema oggetto di studio. In appendice sono stati presentati gli esiti progettuali cui sono pervenuti i partecipanti al workshop su “Il restauro del tempio di S. Maria della neve a Cascia (PG)”. Il contributo descrive, le fasi, le scelte e le difficoltà incontrate, nell'applicazione delle avanzate tecniche di rilevamento, basate sulla fotogrammetria ed il laser scanning, finalizzate all'acquisizione di dati quantitativamente certi sulla geometria delle strutture e qualitativamente validi sullo stato degli affreschi in pessimo stato di conservazione. L'integrazione dei dati strumentali ha prodotto un modello 3D particolarmente efficace nel trasmettere con grande realismo le forme e le criticità; e supportare la pianificazione degli interventi e progetti
Tecnologie Geomatiche integrate per la documentazione, conservazione e valorizzazione del Patrimonio. Il caso di studio della Chiesa della Madonna della neve in località Aremogna a Roccaraso (AQ).
No full textLo studio nasce e si sviluppa all'interno del Dipartimento di Architettura di Pescara, nell'ambito di una ricerca multidisciplinare che vede impegnate la Geomatica e la Storia dell'Architettura e riguarda lo studio storico-conservativo di Beni Architettonici risalenti alla seconda metà del Novecento di chiara ispirazione corbuseriana nella zona di Sulmona e dell'Alto Sangro. Il contributo si sviluppa intorno ad un tema molto discusso e di grande attualità: la ricostruzione virtuale 3D, come valido supporto per orientare la conoscenza, la catalogazione, il restauro, la ricostruzione e la valorizzazione dei monumenti e del costruito storico. In particolare, rivolge l'attenzione all'apporto delle sempre più raffinate e accurate tecniche che fanno capo alla Geomatica per cercare andare oltre gli attuali livelli di rappresentazione visiva per sostenere l'integrazione ed il collegamento delle informazioni interdisciplinari, attraverso lo sviluppo di nuovi strumenti e metodi per la modellazione 3D. E' stato proposto un sistema di procedure tradizionali ed avanzate, economiche ed efficaci, per una modellazione facilmente comprensibile e divulgabile, realizzata sulla base di formati standard, in modo da favorire l'interoperabilità tra le varie competenze interagenti
Multiparty multilevel energy-time entanglement
No full textFranson-like setups are inadequate for multiparty Bell experiments with energy-time entanglement because postselected events can depend on the local settings, and local models can exploit this feature to reproduce the quantum predictions, even in the case of ideal devices. We extend a previously introduced interferometric scheme [ A. Cabello et al. Phys. Rev. Lett. 102 040401 (2009)] to solve this problem in the N-qubit and N-quNit cases. In addition, the proposed setups allow us to prepare and test N-qubit Greenberger-Horne-Zeilinger and (∑i=1N|i...i〉)/√N energy-time entangled states
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