45 research outputs found
Tra melancolia e disciplina. Per una storia costituzionale delle dottrine politiche. Festschrift für Pierangelo Schiera
No full textLa Festschrift per Pierangelo Schiera vuole essere soprattutto un confronto su alcuni temi che lui continua ad affrontare. I contributi qui raccolti da amici e allievi ripercorrono, da prospettive diverse e originali, alcuni di quei temi: il nesso tra legittimazione e rappresentazione dell’ordine (Vincenzo Calì, Giuseppe Olmi); la melancolia e le forme della disciplina (Luigi Lombardi, Gianfranco Borrelli, Angela De Benedictis, Luca Cobbe, Eleonora Cappuccilli, Paola Rudan); il nesso modernista tra scienze sociali e costituzione della società (Matteo Battistini, Niccolò Cuppini, Roberta Ferrari, Maurizio Ricciardi); il liberalismo, l'amministrazione e la “degenerazione” dello Stato moderno (Carla De Pascale, Giuseppe Duso); le autonomie e la disciplina delle costituzioni (Luigi Blanco, Anna Gianna Manca, Renato Mazzolini); la storia costituzionale e le dottrine politiche (Isabella Consolati, Gustavo Gozzi)
Youths on labour market.Features. Particularities. Pro-mobility factors for graduates. Elements of a balanced policy for labour migration
No full textThe youths’ labour market, and especially insertion employment has a series of particularities defined by aspects such as: flexibility, efficient employment, interest for career but also informal employment, external mobility, including brain drain, segmentation, employment precariousness, income disadvantages, etc. Therefore, also the labour market policy and particularly managing labour mobility especially through the economic and social effects that might be triggered on the local labour market in the origin country, presents a special importance under the conditions of the economic turnaround stage, by promoting new and sustainable jobs, based on knowledge and competences. In the present paper an analysis is made about the youths’ labour market features, and the outcomes of an empirical analysis about graduates’ migration propensity are presented. Suggestions are made for developing a balanced policy for youths’ labour mobility to the benefit of the country of origin.youth employment, labour force mobility, labour migration/mobility management
On the Behavior of RObust Header Compression U-mode in Channels with Memory
No full textThe existing studies of RObust Header Compression (ROHC) have provided some understanding for memoryless channel, but the behavior of ROHC for correlated wireless channels is not well investigated in spite of its practical importance. In this paper, the dependence of ROHC against its design parameters for the Gilbert Elliot channel is studied by means of three analytical models. A first more elaborated approach accurately predicts the behavior of the protocol for the single RTP flow profile, while a simpler, analytically tractable model yields clear and insightful mathematical relationships that explain the qualitative trends of ROHC. The results are validated against a real world implementation of this protocol. Moreover, a third model studies also the less conventional yet practically relevant setting of multiple RTP flows
Structural identification for heritage buildings: an HBIM-based approach applied to cultural masonry structures
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Civil , Florianópolis, 2020.A avaliação estrutural de edifícios históricos é uma atividade multidisciplinar desafiadora que envolve diferentes tarefas, como pesquisa histórica e documental, levantamento geométrico, inspeção direta, complementada por testes experimentais, e análise numérica. O diagnóstico do estado de construção das estruturas do patrimônio cultural deve resultar de uma investigação experimental que deve ser não destrutiva (END), na medida do possível. A maioria dos procedimentos de END pode fornecer apenas resultados essencialmente qualitativos. O analista é solicitado a selecionar os ensaios necessários e a interpretar os resultados obtidos. A avaliação estrutural envolve a coleta de dados de uma ampla variedade de fontes e o subsequente processo de seleção. Um alto nível de informação é necessário para simular com precisão o comportamento global do edifício histórico. As informações adquiridas para a avaliação estrutural podem ser armazenadas em um banco de dados para simplificar as análises de pesquisa, prevenindo uma possível perda de informações. Incertezas críticas relacionadas a geometrias e propriedades dos materiais precisam ser minuciosamente investigadas para a obtenção de modelos numéricos confiáveis. Para simular o comportamento estrutural global de um edifício histórico, pode se aplicar uma investigação dinâmica estrutural. Em condições operacionais, é possível obter informações quantitativas globais, como frequências ressonantes e modos vibracionais. Essas informações são representativas da condição estrutural e contribuem notavelmente para o percurso do conhecimento do edifício, reduzindo a incerteza do problema. A proposta da tese foi desenvolver uma metodologia para avaliação estrutural de edifícios do patrimônio cultural, que parte de uma pesquisa histórica e arquitetônica registradas por meio do Historical Building Information Modelling (H-BIM) e complementada pelo levantamento dinâmico. A identificação estrutural baseada em análise modal operacional contribui para o aumento do conhecimento sobre o comportamento estrutural do edifício de patrimônio histórico e a subsequente atualização dos parâmetros do modelo de elementos finitos para uma aprimorada representação numérica. A validação da metodologia é feita através de dois estudos de caso de edifícios de patrimônio histórico. O primeiro estudo de caso é a Galleria degli Antichi, na cidade de Sabbioneta (Itália). Este edifício monumental, construído no século XVI, pertence à lista de Patrimônio Mundial da UNESCO desde 2008. O segundo estudo de caso é o Quartel da Tropa, edifício do século XVIII, que é um dos principais edifícios da Fortaleza de Santa Cruz, localizado na Ilha Anhatomirim, município de Governador Celso Ramos, Estado de Santa Catarina, Brasil. A avaliação das informações, coletadas pela pesquisa histórica e arquitetônica, o H-BIM e os testes dinâmicos, permitiram a validação da metodologia, reduzindo as principais incertezas quanto à definição de modelos numéricos e à avaliação do estado de preservação da estrutura do edifício, de maneira totalmente não destrutiva. A compreensão do comportamento estrutural da estrutura foi aprimorada pela avaliação do modelo numérico atualizado, aumentando o nível de conhecimento ao respeito dos edifícios patrimoniais analisados. Assim, foi desenvolvida uma metodologia para identificação estrutural de edifícios do patrimônio cultural, que otimiza a gestão de informações através do H-BIM favorecendo a colaboração multidisciplinar necessária para projeto e ações de intervenção em patrimônio.Abstract: The structural assessment of heritage buildings is a challenging multidisciplinary activity involving different tasks, e.g. historical and documentary research, geometric survey, direct inspection supplemented by experimental tests, numerical analysis. Moreover, the diagnosis of the as-built state of the cultural heritage structures should result from an experimental in-situ investigation that must be a non-destructive test (NDT) as far as possible, still giving consistent information. However, most of the NDTs provide results which are essentially qualitative. The designer is asked to select the necessary tests and to interpret the obtained results. Therefore, structural assessment involves the collection of data from a wide range of sources and the subsequent selection process. The information acquired for the structural evaluation can be stored in a database to simplify the research analysis, preventing a possible loss of information. Hence, a high level of information is required to accurately simulate the global behaviour of the heritage building. However, such input data are not easily available. Critical uncertainties related to geometries and material properties must be sufficiently investigated to obtain reliable numerical models. Furthermore, dynamic investigation in operational conditions provides global quantitative information, i.e. resonant frequencies, mode shapes. Such information is3 representative of the structural condition and remarkably contribute to the path to knowledge of the building, reducing the uncertainty of the problem. In this research, the author develops a methodology involving historical and architectural research complemented by H-BIM and dynamic survey for the structural assessment of cultural heritage buildings. A threedimensional informative model is created through the Heritage Building Information Model (H-BIM). Moreover, vibration-based structural identification through operational modal analysis allows increasing the knowledge of the heritage building structural behaviour and the subsequent Finite Element model tuning for an improved numerical representation of the structural behaviour of the heritage building. The development and validation of the methodology are proposed through two heritage building case studies. The first is the Galleria degli Antichi in the historic town of Sabbioneta (Italy). This monumental building, built in the 16th-century, belongs to the UNESCO World Heritage list since 2008. The second is the Quartel da Tropa, which is the largest among Brazilian military fortifications of the 18th-century. It is one of the main buildings of the Fortress of Santa Cruz, located on Anhatomirim Island, municipality of Governador Celso Ramos, State of Santa Catarina, Brazil. The information collected by historical and architectural investigations, H-BIM and dynamic tests allowed validating the methodology, reducing the main uncertainties associated with the numerical models and assessing the structural state of preservation of the building, in a fully nondestructive way. Moreover, the understanding of the overall structural behaviour was improved by the evaluation of the updated numerical model, increasing the level of knowledge of the analysed heritage buildings. Thus, a methodology was developed for the structural identification of cultural heritage buildings, which optimizes information management through H-BIM, improving the multidisciplinary collaboration necessary for heritage projects and intervention actions
Transcatheter edge‐to‐edge mitral valve repair for post‐myocardial infarction papillary muscle rupture and acute heart failure: A systematic review
No full textPapillary muscle rupture (PMR) is a rare complication of acute myocardial infarction (AMI) associated with high mortality and morbidity. Surgery is the gold-standard treatment for these patients, but it is burdened by a high perioperative risk due to hemodynamic instability. Mitral transcatheter edge-to-edge repair (M-TEER) was reported to be safe and effective in unstable patients with significant mitral regurgitation. However, data in patients with post-AMI PMR are limited to a few case reports. In this review, we summarized all data available regarding percutaneous treatment of post-AMI PMR. These results show that M-TEER is safe and effective in this setting with low in-hospital mortality and complications and high rate of significant mitral regurgitation reduction
Human-in-the-loop methods for occupant-centric building design and operation
No full textA comfortable indoor environment should be one of the main services buildings provide. However, technical building systems are typically designed and operated according to fixed set-point temperatures determined by the ‘one-size-fits-all’ principle assuming universal thermal comfort requirements, which has been questioned in the last fifty years. Designing and implementing comfortable set-point modulations that consider occupant feedback would be beneficial in terms of increasing comfort, potentially reduce energy consumption and significantly support the clean energy transition. An exploratory study aimed at predicting the thermal preferences of human subjects exposed to a dynamic thermal environment is presented. Using data acquired from a laboratory experiment where subjects were exposed to precisely controlled thermal ramps in an ‘office-like’ climatic chamber, cluster-specific and population-averaged methods are designed to handle the group-level residual during the prediction of the thermal preference votes. The results show that both approaches are valid strategies for modelling thermal preference votes and are effective in supporting a concrete occupant-centric building design and the building’s operation. Furthermore, the population-averaged approach is suitable for the occupant-centric building design phase, where the target is an ‘average’ occupant. The cluster-specific method is best suited to meet the needs of a specific occupant and is suitable for implementation in the operational phase of the building.<br/
Exposing open street map in the linked data cloud
No full textAfter the mobile revolution, geographical knowledge has getting more and more importance in many location-aware application scenarios. Its popularity influenced also the production and publication of dedicated datasets in the Linked Data (LD) cloud. In fact, its most recent representation shows Geonames competing with DBpedia as the largest and most linked knowledge graph available in the Web. Among the various projects related to the collection and publication of geographical information, as of today, Open Street Map (OSM) is for sure one of the most complete and mature one exposing a huge amount of data which is continually updated in a crowdsourced fashion. In order to make all this knowledge available as Linked Data, we developed LOSM: a SPARQL endpoint able to query the data available in OSM by an on-line translation form syntax to a sequence of calls to the OSM overpass API. The endpoint makes also possible an on-the-fly integration among Open Street Map information and the one contained in external knowledge graphs such as DBpedia, Freebase or Wikidata
