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Upgrading Sustainable Polyurethane Foam Based on Greener Polyols: Succinic-Based Polyol and Mannich-Based Polyol
Get PDFIt is well known that the traditional synthetic polymers, such as Polyurethane foams, require raw materials that are not fully sustainable and are based on oil-feedstocks. For this reason, renewable resources such as biomass, polysaccharides and proteins are still recognized as one of the most promising approaches for substituting oil-based raw materials (mainly polyols). However, polyurethanes from renewable sources exhibit poor physical and functional performances. For this reason, the best technological solution is the production of polyurethane materials obtained through a partial replacement of the oil-based polyurethane precursors. This approach enables a good balance between the need to improve the sustainability of the polymer and the need to achieve suitable performances, to fulfill the technological requirements for specific applications. In this paper, a succinic-based polyol sample (obtained from biomass source) was synthesized, characterized and blended with cardanol-based polyol (Mannich-based polyol) to produce sustainable rigid polyurethane foams in which the oil-based polyol is totally replaced. A suitable amount of catalysts and surfactant, water as blowing reagent and poly-methylene diphenyl di-isocyanate as isocyanate source were used for the polyurethane synthesis. The resulting foams were characterized by means of infrared spectroscopy (FTIR) to control the cross-linking reactions, scanning electron microscopy (SEM) to evaluate the morphological structure and thermal gravimetric analysis (TGA) and thermal conductivity to evaluate thermal degradation behavior and thermal insulation properties
Mercados de Abasto : patrimonio turismo gentrification
No full textSupply markets have emerged as a central theme in the urban policies of many cities around the world. After decades of relative neglect, largely due to the increase in other commercial formats (self-service stores, supermarkets and now digital internet shopping), markets are re-emerging on the urban agenda of local governments and have become the focus of interest for various investors and international institutions, such as the UN Habitat programme or the Inter-American Development Bank. The transformation, reconversion and even destruction of markets is not new. In the relatively recent past several markets were relocated and destroyed (Les Halles in Paris in 1971) or reconverted into cultural and commercial centers in the 1980s (Convent Garden in London and El Abasto in Buenos Aires). This book presents the contemporary problems and challenges of markets, as well as the recent projects, policies, trends and forms of management carried out to confront these challenges in various cities in Europe, Latin America and the Middle East. Several chapters of the book discuss the visions of the end of a "natural" life cycle of markets and whether the only way to modernize them in order to confront the competition of supermarket chains and online commerce is their reconversion into gourmet gastronomic and cultural consumption centers for tourists. The book, through the contribution of different sciences and disciplines, analyzes transversal themes such as cultural tourism, urban and architectural heritage, urban decline and revitalization, gentrification, memories and collective identities, and the circulation of urban policies and paradigms
The ArchaeoBIM method and the role of digital models in archaeology
Get PDFThe paper deals with the development of a novel methodology, named ArchaeoBIM, aimed at the creation of digital models representing no longer existing buildings, starting from the available information collected from the archaeological contexts. The process is inferred by the Building Information Modeling used in the contemporary building industry, where different disciplines converge into digital models. The achieved models meet some of the cutting-edge issues of the Virtual Archaeology, i.e. validation, management of data, simulation. These products answer to important needs in the fields of research, conservation and dissemination and could be considered as archaeological records themselves
Rule-based inferencing diagnosis in HBIM
Get PDFThe aim of this paper is the implementation of a methodological workflow for the diagnosis of masonry settlings, within the HBIM approach, developing a rule-based logical inference tool in Visual Programming Language. The rule-based inferencing diagnosis is a guided process, which increases the confidence factor about settlings and actual causes, on the basis of surveyors’ technical insights and evidences. The final step is the suggestion of appropriate interventions. The results show that inference logic is directly applicable to the diagnosis problem; their efficacy depends on i) the structured parametric and data modelling of decay patterns in the HBIM model and ii) the knowledge base training. The application has been validated on a case study, Masseria Don Cataldo (Bari, South Italy)
L'amore dei libri. Prima edizione con traduzione italiana a cura di Luigi M. Reale
Get PDFPrima edizione con traduzione italiana dell’opera del critico francese Jules Janin (1804-1874). Pubblicata su rivista nel 1860 (e in opuscolo nel 1866) in forma di lettera ad un giovane amico, a cui fornisce consigli per allestire la propria biblioteca, è dedicata alla “passione per i libri”, ovvero la bibliofilia, definita da Mouravit “branca della letteratura attiva e militante”. Il testo è corredato da un fitto apparato di note e dall’indice dei nomi. Completano il volume la notizia biografica e la bibliografia completa dell'autore
The Coastal Sustainability Standard method: a case study in Calabria (Southern Italy)
No full textCoastal regions and river basins hold a great variety of geological, ecological, social and economic roles mutually dependent and interacting. So, a global approach of these sensitive and transitional areas should include their seaward and landward sides. By this way, the Organization of United Nations has suggested a new management pattern of littoral zones named Integrated Coastal Area and River basin Management, able to merge, into the same landscape unit, marine, coastal and riverine systems. However, in italian seaboard areas, there is a total lack of an overall strategy to carry out national and/or regional plans for a sustainable development of coastal regions. In this regard, also in the Calabria region (Southern Italy) the suggested new kind of holistic approach is totally neglected although its coastline shows a broad extent of 715 km and the hydrographic network is made up by 1003 catchments forming a complex drainage system. This new kind of coastal management was verified through the application of a Coastal Sustainability Standard method applied, for the first time in Italy, in a study area in the western seaside of Calabria. The results of the field survey highlight a total failure of an inclusive coastal management process capable to realize a comprehensive landscape planning of marine, coastal and riverine systems. Instead, Calabria could be the leader coastal region in Italy where landward and seaward sides could be connected along the ecological corridors of their river basins
Relazione tecnica sulle attività svolte dal gruppo di lavoro CNR DIITET per il progetto OT4CLIMA - Decreto MUR n.1735/2017
Get PDFLa relazione tecnica ha permesso di illustrare lo stato di avanzamento del progetto nei primi 3 SAL dal punto di vista del coordinamento delle U.O. CNR (n.17), per un'agevolazione pari a euro 1.639.295,91, e la metodologia di lavoro pensata e creata specificatamente per il progetto. Il campione di dati economico-finanziari raccolti ed analizzati ha permesso un'elaborazione puntuale dei costi distribuiti in base ai criteri della territorialità degli Istituti e dei relativi OR di afferenza
Scavo e scuola a Tarquinia. Internazionalizzazione e formazione a difesa della fragilità di un sito UNESCO
Get PDFTarquinia is a site of high relevance for the themes of this conference, from fragility to internationalisation, which can be explored on evidence gathered through uninterrupted and systematic presence of researchers from the University of Milan, since 1982. The site has attracted interdisciplinary initiatives and scholars from Universities and research institutes throughout Europe and the world. Today the ancient Etruscan city, buffer zone of the UNESCO site (2004), i.e. the necropolis of painted tombs, is threatened by various geomorphological phenomena and by the risk of abandonment of active research, hindered by current legal-administrative conditions. However, the continuity can counteract this two-faced fragility. This research is based on an established tradition and it is constantly renewed, with obvious advantages for the UNESCO site, which is always under the spotlight. The Tarquinian territory is one of the fields in which the interdisciplinary collaboration immediately yields high returns, especially focusing on a complete and defined survey, through the recent acquirements of topographic research (LiDAR, GIS, geophysical prospections) combined with archaeological investigation. This includes a thorough study of how the ancient city is integrated in the current town plan and in urban planning for the territory: the rules of archaeological, environmental and landscape safeguards the UNESCO Buffer zone vary considerably for specific land plots. However, if on the one hand it is right to think in terms of agricultural development and productivity, this must be done in a way that is respectful of the Etruscan metropolis, whose immense buried archaeological potential is as yet little known
Pericardial Fluid in a COVID-19 Patient: Is It Exudate or Transudate?
Get PDFBackground: Very limited information is available on pericardial effusion as a complication of COVID-19 infection. There are no reports regarding pericardial fluid findings in COVID-19 patients. Case description: We describe a 41-year-old woman, with confirmed COVID-19, who presented with a large pericardial effusion. The
pericardial fluid was drained. We present the laboratory findings to improve knowledge of this virus. Discussion: We believe this is the first such reported case. Findings suggested the fluid was exudative, with remarkably high lactate dehydrogenase and albumin levels. We hope our data provide additional insight into the diagnosis and therapeutic options for managing this infection
Late Pulmonary Embolism after COVID-19 Pneumonia despite Adequate Rivaroxaban Treatment
Get PDFIntroduction: SARS-CoV-2 infection may predispose patients to thrombotic disease. Patients with COVID-19 pneumonia who are receiving non-vitamin K antagonists or direct oral anticoagulants for chronic disease are usually switched to heparin treatment during hospitalization. However, information about the most appropriate antithrombotic therapy after the acute infection phase is lacking.Case Description: We report the case of a patient with chronic atrial fibrillation who was recently hospitalized for severe COVID-19 pneumonia. Four weeks after discharge he experienced an episode of an acute pulmonary embolism while on rivaroxaban therapy with adequate drug plasma levels, and in the absence of strong predisposing risk factors.Conclusion: This case highlights the risk of thrombotic complications after COVID-19 infection, raises some concern about their underlying mechanisms, and supports the use of effective anti-thrombotic therapy