985 resultados para Palazzo vecchio (Florence, Italy)
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CO2 Emission from two old mine drillings (Mt. Amiata, Central Italy) as a possible example of storage and leakage of deep-seated CO2
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Along the Apulian Adriatic coast, in a cliff south of Trani, a succession of three units (superimposed on one another) of marine and/or paralic environments has been recognised. The lowest unit I is characterised by calcareous/siliciclastic sands (css), micritic limestones (ml), stromatolitic and characean boundstones (scb), characean calcarenites (cc). The sedimentary environment merges from shallow marine, with low energy and temporary episodes of subaerial exposure, to lagoonal with a few exchanges with the sea. The lagoonal stromatolites (scb subunit) grew during a long period of relative stability of a high sea level in tropical climate. The unit I is truncated at the top by an erosion surface on which the unit II overlies; this consists of a basal pebble lag (bpl), silicicla - stic sands (ss), calcareous sands (cs), characean boundstones (cb), brown paleosol (bp). The sedimentary environment varies from beach to lagoon with salinity variations. Although there are indications of seismic events within the subunits cs, unit II deposition took place in a context of relative stability. The unit II is referable to a sea level highstand. Unit III, trangressive on the preceding, consists of white calcareous sands (wcs), calcareous sands and calcarenites (csc), phytoclastic calcirudite and phytohermal travertine (pcpt), mixed deposits (csl, m, k, c), sands (s) and red/brown paleosols (rbp). The sedimentation of this unit was affected by synsedimentary tectonic, attested by seismites found at several heights. Also the unit III is referable to a sea level highstand. The scientific literature has so far generally attributed to the Tyrrhenian (auct.) the deposits of Trani cliff. As part of this work some datings were performed on 10 samples, using the amino acid racemization method (AAR) applied to ostracod carapaces. Four of these samples have been rejected because they have shown in laboratory recent contamination. The numerical ages indicate that the deposits of the Trani cliff are older than MIS 5. The upper part of the unit I has been dated to 355±85 ka BP, thus allowing to assign the lowest stromatolitic subunit (scb) at the MIS 11 peak and the top of the unit I at the MIS 11-MIS 10 interval. The base of the unit II has been dated to 333±118 ka BP, thus attributing the erosion surface that bounds the units I and II to the MIS 10 lowstand and the lower part of the unit II to MIS 9.3. The upper part of the unit II has been dated to 234±35 ka BP, while three other numerical ages come from unit III: 303±35, 267±51, 247±61 ka BP. At present, the numerical ages cannot distinguish the sedimentation ages of units II and III, which are both related to the MIS 9.3- MIS 7.1 time range. However, the position of the units, superimposed one another, and their respective age, allows us to recognise a subsidence phase between MIS 11 and MIS 7, followed by an uplift phase between the MIS 7 and the present day, which led the deposits in their current position. This tectonic pattern is not in full agreement with what is described in the literature for the Apulian foreland.
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The Mt. Amiata volcano (Tuscany, central Italy) hosts the second largest geothermal field of Italy. Its SW and NE sectors are characterized by the presence of several CO2-rich (mayor que95% by vol.) gas discharges. An intense Hg mining activity had taken place from the 19th century up to the end of the ?70s, particularly close to Abbadia San Salvatore, during which two drillings (Acqua Passante and Ermeta) intercepted a CO2-rich gas fertile horizon. The related gases are emitted in the atmosphere since 1938 and 1959, respectively, causing severe concerns for the local air quality. In this work the results of a geochemical and isotopic survey carried out on these gas emissions from March 2009 to January 2014 are presented. CO2 fluxes from both the two wells and soil from an area of about 653,500 m2 located between them were measured. The two wells are emitting up to 15,000, 92 and 8 tons y-1 of CO2, CH4 and H2S, respectively, while the computed soil CO2 output was estimated at 4,311 ton y-1. The spatial distribution of the CO2 soil flux suggests the presence of preferential patterns, indicating sites of higher permeability. Since the local municipality is evaluating the possibility to plug the Ermeta vent, a temporarily closure should first be carried out to test the possible influence of this operation on the diffuse soil degassing of deep-originated CO2 in the surrounding area. This implies that diffuse soil gases should carefully be monitored before proceeding with its definitive closure.
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Lugar y fecha de imp. tomados de tít
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A BOX OPEN TO THE SKY = UNA CAJA ABIERTA AL CIELO
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This house was born in response to an international competition organized in Italy; la Casa piú bella del Mondo (the most beautiful house in the world).
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Entre 1966 y 1967 un pequeño grupo de jóvenes arquitectos recién titulados en la Facultad de Arquitectura de Florencia escenifican en dos actos programados en las ciudades de Pistoia y Módenala exposición Superarchitettura, con la que sin saberlo inauguran un corto pero intenso periodo de experimentación arquitectónica que convulsionaría Italia durante los 10 años posteriores, dinamitados por multitud de propuestas que darán lugar a la última arquitectura con aspiraciones socio-políticas responsable de un vibrante legado teórico que proclamaba la vuelta a las raíces olvidadas de la profesión y que se mostraba más preocupada por reflexionar sobre sus fundamentos que por perpetuar la práctica de un oficio ahora puesto en crisis. Ambos eventos suponen también el nacimiento simultáneo de Superstudio y Archizoom, dos de los colectivos más influyentes de la arquitectura experimental italiana de estos años, convertidos en protagonistas de un agitado periodo de transición en el que una generación estaba dando paso a la siguiente a través de la sustitución de los principios doctrinarios recibidos de la modernidad por una jugosa incertidumbre desmitificadora ligada a una nueva realidad económica, política y social que marcaría los inicios de la posmodernidad. La experiencia italiana surge aprovechando la efervescencia de un fenómeno que posteriormente algunos críticos etiquetaron como Arquitectura Radical con la intención de unificar el trabajo de un heterogéneo y atomizado grupo de arquitectos fundamentalmente europeos – individualmente comprometidos con el replanteamiento total de la definición y objetivos de la disciplina, al tiempo que participaban en una particular cruzada existencial mediante la que pretendían, si no cambiar el mundo, al menos romper la dinámica estéril de la arquitectura profesional y tecnológica heredada. La presente tesis fomenta la recuperación interesada de este breve momento radical como un ambicioso proyecto de modernización inacabado, pero no solo para analizar las causas de su precipitado final, sino sobre todo para mostrar las razones de su gran éxito internacional, convirtiendo para ello el trabajo de Superstudio, ejemplo paradigmático de la actitud crítica compartida por el resto de operadores contemporáneos, en el catalizador adecuado a partir del cual interpretar y extrapolar su legado con el fin de narrar el cambio trascendental que este episodio supuso para la práctica arquitectónica, alejándola del diseño de edificios y centrándola en la adopción y aplicación de multitud de actividades no tectónicas en un intento por separarse de lo que era percibido como una disciplina corrupta. A lo largo de su corta carrera en común, los seis miembros de Superstudio sustituyeron la construcción convencional por la explotación intensiva de medios alternativos desde el diseño de mobiliario e iluminación y algunos experimentos en torno a la “arquitectura eléctrica”, hasta la expansión mediática de su trabajo a través de revistas, películas, exposiciones y conferencias contribuyendo así a una provocativa destrucción y posterior expansión de los límites dentro de los que hasta ese momento se había mantenido cómodamente instalada la arquitectura. Esta investigación descubre la trascendencia de considerar aquello que ocupó gran parte de la actividad de Superstudio y de sus colegas radicales (muebles, revistas, instalaciones, películas, labor teórica y docente, etc.) como nuevas formas de arquitectura con las que construir un nuevo lenguaje crítico, en un intento por contribuir a renovar y reforzar la relevancia y responsabilidad social de una profesión llamada a expandirse más allá de lo construido para nutrirse e interactuar con todos los ámbitos de nuestro entorno diario. ABSTRACT Between 1966 and 1967 a small group of newly qualified young architects from the Faculty of Architecture of Florence staged in two events planned in the cities of Pistoia and Modena the Superarchitettura exhibition, with which unwittingly inaugurated a short but intense period of architectural experimentation that convulse Italy during the following 10 years, blown up by a multitude of proposals that will result in the latest architecture with socio political aspirations responsible for a vibrant theoretical legacy proclaiming a return to forgotten roots of the profession and that was more concerned with reflect on its fundamentals than perpetuate the practice of a profession now put into crisis. Both events also involve the simultaneous birth of Superstudio and Archizoom, two of the most influential groups of Italian experimental architecture of these years, turned into protagonists of an hectic period of transition in which a generation was giving way to the next through replacing the received doctrinal principles of modernity by a juicy demystifying uncertainty linked to a new reality economic, political and social that would mark the beginning of postmodernism. The Italian experience arises taking advantage of the commotion of a phenomenon that later some critics labeled as Radical Architecture with the intention of unifying the work of a diverse and fragmented group of architects mainly European individually committed to the total rethinking of the definition and objectives of the discipline, while participating in a particular existential crusade with which they sought to, if not change the world, at least break out of the sterile dynamic of professional and technological architecture inherited. This doctoral thesis promotes an interested recovery of in this short radical time as an ambitious modernization project unfinished, but not only to analyze the causes of its precipitous end, but above all to show the reasons for it’s international success, turning the work of Superstudio, a paradigmatic example of the critical attitude shared by the rest of contemporary operators, into the suitable catalyst from which to interpret and extrapolate it’s legacy in order to recount the significant change that this episode marked for architectural practice, moving it away from building and focusing it on the adoption and implementation of many nonLtectonic activities in an attempt to separate from what was perceived as a corrupt discipline. Throughout their short career in common, the six members of Superstudio replaced conventional construction by intensive exploitation of alternative means L from furniture and lighting design and some experiments around the "electric architecture", to the media expansion of their work through magazines, films, exhibitions and lectures thus contributing to a provocative destruction and subsequent expansion of the limits within which architecture had remained ensconced until then. This dissertation finds out the importance of considering what occupied much of the activity of Superstudio and their radical colleagues (furniture, magazines, installations, films, theoretical and educational work, etc.) as new forms of architecture that build a new critical language, in an attempt to help renew and reinforce the relevance and social responsibility of a profession call to expand beyond the built to nourish and interact with all areas of our everyday environment.
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10th President 1931-1937
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Gaines studied History and Education at Lincoln and was frequently seen in Memorial Hall chatting with his mentors in the History Department, Drs. W. Sherman Savage and Lorenzo Greene about his future after graduation.
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Toxoplasma gondii is a coccidian parasite with a global distribution. The definitive host is the cat (and other felids). All warm-blooded animals can act as intermediate hosts, including humans. Sexual reproduction (gametogony) takes place in the final host and oocysts are released in the environment, where they then sporulate to become infective. In intermediate hosts the cycle is extra-intestinal and results in the formation of tachyzoites and bradyzoites. Tachyzoites represent the invasive and proliferative stage and on entering a cell it multiplies asexually by endodyogeny. Bradyzoites within tissue cysts are the latent form. T. gondii is a food-borne parasite causing toxoplasmosis, which can occur in both animals and humans. Infection in humans is asymptomatic in more than 80% of cases in Europe and North-America. In the remaining cases patients present fever, cervical lymphadenopathy and other non-specific clinical signs. Nevertheless, toxoplasmosis is life threatening if it occurs in immunocompromised subjects. The main organs involved are brain (toxoplasmic encephalitis), heart (myocarditis), lungs (pulmonary toxoplasmosis), eyes, pancreas and parasite can be isolated from these tissues. Another aspect is congenital toxoplasmosis that may occur in pregnant women and the severity of the consequences depends on the stage of pregnancy when maternal infection occurs. Acute toxoplasmosis in developing foetuses may result in blindness, deformation, mental retardation or even death. The European Food Safety Authority (EFSA), in recent reports on zoonoses, highlighted that an increasing numbers of animals resulted infected with T. gondii in EU (reported by the European Member States for pigs, sheep, goats, hunted wild boar and hunted deer, in 2011 and 2012). In addition, high prevalence values have been detected in cats, cattle and dogs, as well as several other animal species, indicating the wide distribution of the parasite among different animal and wildlife species. The main route of transmission is consumption of food and water contaminated with sporulated oocysts. However, infection through the ingestion of meat contaminated with tissue cysts is frequent. Finally, although less frequent, other food products contaminated with tachyzoites such as milk, may also pose a risk. The importance of this parasite as a risk for human health was recently highlighted by EFSA’s opinion on modernization of meat inspection, where Toxoplasma gondii was identified as a relevant hazard to be addressed in revised meat inspection systems for pigs, sheep, goats, farmed wild boar and farmed deer (Call for proposals -GP/EFSA/BIOHAZ/2013/01). The risk of infection is more highly associated to animals reared outside, also in free-range or organic farms, where biohazard measure are less strict than in large scale, industrial farms. Here, animals are kept under strict biosecurity measures, including barriers, which inhibit access by cats, thus making soil contamination by oocysts nearly impossible. A growing demand by the consumer for organic products, coming from free-range livestock, in respect of animal-welfare, and the desire for the best quality of derived products, have all led to an increase in the farming of free-range animals. The risk of Toxoplasma gondii infection increases when animals have access to environment and the absence of data in Italy, together with need for in depth study of both the prevalence and genotypes of Toxoplasma gondii present in our country were the main reasons for the development of this thesis project. A total of 152 animals have been analyzed, including 21 free-range pigs (Suino Nero race), 24 transhumant Cornigliese sheep, 77 free-range chickens and 21 wild animals. Serology (on meat juice) and identification of T. gondii DNA through PCR was performed on all samples, except for wild animals (no serology). An in-vitro test was also applied with the aim to find an alternative and valid method to bioassay, actually the gold standard. Meat samples were digested and seeded onto Vero cells, checked every day and a RT-PCR protocol was used to determine an eventual increase in the amount of DNA, demonstrating the viability of the parasite. Several samples were alos genetically characterized using a PCR-RFLP protocol to define the major genotypes diffused in the geographical area studied. Within the context of a project promoted by Istituto Zooprofilattico of Pavia and Brescia (Italy), experimentally infected pigs were also analyzed. One of the aims was to verify if the production process of cured “Prosciutto di Parma” is able to kill the parasite. Our contribution included the digestion and seeding of homogenates on Vero cells and applying the Elisa test on meat juice. This thesis project has highlighted widespread diffusion of T. gondii in the geographical area taken into account. Pigs, sheep, chickens and wild animals showed high prevalence of infection. The data obtained with serology were 95.2%, 70.8%, 36.4%, respectively, indicating the spread of the parasite among numerous animal species. For wild animals, the average value of parasite infection determined through PCR was 44.8%. Meat juice serology appears to be a very useful, rapid and sensitive method for screening carcasses at slaughterhouse and for marketing “Toxo-free” meat. The results obtained on fresh pork meat (derived from experimentally infected pigs) before (on serum) and after (on meat juice) slaughter showed a good concordance. The free-range farming put in evidence a marked risk for meat-producing animals and as a consequence also for the consumer. Genotyping revealed the diffusion of Type-II and in a lower percentage of Type-III. In pigs is predominant the Type-II profile, while in wildlife is more diffused a Type-III and mixed profiles (mainly Type-II/III). The mixed genotypes (Type-II/III) could be explained by the presence of mixed infections. Free-range farming and the contact with wildlife could facilitate the spread of the parasite and the generation of new and atypical strains, with unknown consequences on human health. The curing process employed in this study appears to produce hams that do not pose a serious concern to human health and therefore could be marketed and consumed without significant health risk. Little is known about the diffusion and genotypes of T. gondii in wild animals; further studies on the way in which new and mixed genotypes may be introduced into the domestic cycle should be very interesting, also with the use of NGS techniques, more rapid and sensitive than PCR-RFLP. Furthermore wildlife can become a valuable indicator of environmental contamination with T. gondii oocysts. Other future perspectives regarding pigs include the expansion of the number of free-range animals and farms and for Cornigliese sheep the evaluation of other food products as raw milk and cheeses. It should be interesting to proceed with the validation of an ELISA test for infection in chickens, using both serum and meat juice on a larger number of animals and the same should be done also for wildlife (at the moment no ELISA tests are available and MAT is the reference method for them). Results related to Parma ham do not suggest a concerning risk for consumers. However, further studies are needed to complete the risk assessment and the analysis of other products cured using technological processes other than those investigated in the present study. For example, it could be interesting to analyze products such as salami, produced with pig meat all over the Italian country, with very different recipes, also in domestic and rural contexts, characterized by a very short period of curing (1 to 6 months). Toxoplasma gondii is one of the most diffuse food-borne parasites globally. Public health safety, improved animal production and protection of endangered livestock species are all important goals of research into reliable diagnostic tools for this infection. Future studies into the epidemiology, parasite survival and genotypes of T. gondii in meat producing animals should continue to be a research priority.