Estratigrafía de Sr y evolución sedimentaria de los depósitos marinos del Mioceno temprano en el antepaís del norte de la Cuenca Austral (o Magallanes), Argentina

Early Miocene shallow marine deposits in the region of Lago Posadas-Meseta Belgrano (Argentina) represent part of the “Patagoniense” transgression, an Atlantic marine incursion that flooded large part of Patagonia, including the Austral (foreland) Basin (southern Patagonia). These deposits, referred as El Chacay (Argentina) or Guadal (Chile) formations, and the transition to the overlying Santa Cruz Formation were divided into six facies: subtidal sandbars, shallow marine sandy deposits, muddy shelf deposits, estuarine complex deposits, fluvial channels and fluvial floodplains. These are arranged in a general transgressive-regressive cycle, subdivided into two stratigraphic sequences, separated by a major erosional surface. 87Sr/86Sr ages from shell carbonate in eight oysters yielded an age range of 20.3 to 18.1 Ma for these “Patagoniense” deposits. Correlation with other dated “Patagoniense” sections in southern Patagonia, like those at Lago Argentino or Comodoro Rivadavia, indicates that they belong to a single transgression that flooded several Patagonian basins approximately at the same time. Eustasy, flexural subsidence created by tectonic loading in the adjacent fold-and-thrust belt, and basin floor paleo-topography controlled the duration of the depositional event and the sedimentation style of these shallow marine deposits.Los depósitos marino-someros del Mioceno temprano de la región del Lago Posadas-Meseta Belgano representan parte de la transgresión “Patagoniense”, una incursión marina atlántica que invadió gran parte de la Patagonia, incluyendo la Cuenca de antepaís Austral (Patagonia austral). Estos depósitos, referidos como formaciones El Chacay (Argentina) y Guadal (Chile), y su transición a la suprayacente Formación Santa Cruz, fueron divididos en seis facies: barras submareales, depósitos arenosos marino-someros, depósitos fangosos de plataforma, complejo estuarino, canales fluviales y planicie de inundación. Estas facies muestran un arreglo general transgresivo-regresivo, el que puede ser subdividido en dos secuencias estratigráficas separadas por una superficie erosiva. Resultados de ocho edades 87Sr/86Sr de carbonato tomado de valvas de ostras dieron un rango entre 20,3 Ma y 18,1 Ma para estos depósitos Patagonienses. La correlación con sucesiones equivalentes de edad conocida en la Patagonia Austral, como las del Lago Argentino o Comodoro Rivadavia, indican que estas pertenecen a una misma transgresión que inundó gran parte de la Patagonia aproximadamente al mismo tiempo. La eustacia, la subsidencia flexural creada por carga tectónica en la faja corrida y plegada adyacente, y la paleotopografía del fondo de la cuenca, controlaron la duración del evento depositacional y el estilo de sedimentación estos depósitos marino-someros.Fil: Cuitiño, José Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Ventura Santos, Roberto. Universidade de Brasília; BrasilFil: Alonso Muruaga, Pablo Joaquin. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; ArgentinaFil: Scasso, Roberto Adrian. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentin

Street luminosity influence on reported thefts from vehicles during night-time

Dissertation submitted in partial fulfilment of the requirements for the Degree of Master of Science in Geospatial TechnologiesCriminality across many urban settings has created the need to develop tools that help better understand the social and physical determinants of crime. One specific aspect is how certain urban characteristics may influence criminal activities. One facet of the built environment, street lighting, influences the perception of safety for a potential victim, and it also influences a perpetrator´s risk analysis, affecting how it envisions both costs and rewards for committing a crime. The study looked into the relationship between street illuminance levels, through street light pole density as a proxy, and other crime determinants and the prevalence of reported Night-Time Theft from Vehicle crimes in Vancouver, BC, Canada, through exploratory spatial data analysis and by fitting Geographically Weighted Poisson Regressions. To test if street lighting pole density is a usable proxy for street illuminance it also modeled the relationship between street lighting pole and tree densities and measured night time street illuminance by fitting an Ordinary Least Squares regression. Night time street illuminance was measured using a specially built georeferenced mobile illuminance collection station based on the senseBox. Findings suggest that while a citywide effect is evident for some of the explanatory variables, there is an evident nonstationary relation between the explanatory variables and Night-Time Theft from Vehicle crimes in Vancouver. Regarding street lighting, regressions suggest it may not be an important covariate with Night-Time Theft from Vehicle crime. Coefficients are quite heterogenous throughout with most of the study area showing a mix of weak to mild positive association, specially on the East side, and weak to mild negative associations. The OLS regression showed a moderately weak relation between light poles and tree densities to collected street illuminance. The question of street lighting pole density being a usable proxy for street illuminance could not be answered with confidence

Real-time evaluation and management of extreme traffic load risk on main road’s bridges

The risk induced by extreme traffic loads on bridges was rarely investigated and the existing methods require computationally expensive elaborations that are not compatible with a real time risk management. Traditional approaches to reduce risk suggested the optimisation of bridge maintenance plans. Conversely, approaches that real-time evaluate and manage the risk are missing. Moreover, the integration of emerging prediction models, such as Artificial Neural Networks, was never explored. This study fills the previous gaps by proposing a three-block methodology. It adopts Weight-In-Motion systems to collect site-traffic load data, formulates a probabilistic Risk Prediction Model to estimate frequency and severity of bridge failure events according to Eurocodes, and simulates an Intelligent Transportation System (ITS) architecture to apply real time management actions. The methodology was tested on 2.5M+ vehicles raw WIM data gathered along the ring road of Brescia (Italy). Bridge failure events resulted significantly more frequent than that prescribed by Eurocode, and factors of compliance with Traffic Code mass limits prescriptions had the more significant effect on risk predictions. The findings suggest a greater attention when permits for extremely overweighed vehicles are issued, as well as the implementation of enforcement strategies and ITS-based architectures for the real time risk management

Development of a rapid LC-MS/MS Method for the determination of emerging fusarium mycotoxins enniatins and beauvericin in human biological fluids

A novel method for the simultaneous determination of enniatins A, A1, B and B1 and beauvericin, both in human urine and plasma samples, was developed and validated. The method consisted of a simple and easy pretreatment, specific for each matrix, followed by solid phase extraction (SPE) and detection by high performance liquid chromatography-tandem mass spectrometry with an electrospray ion source. The optimized SPE method was performed on graphitized carbon black cartridges after suitable dilution of the extracts, which allowed high mycotoxin absolute recoveries (76%-103%) and the removal of the major interferences from the matrix. The method was extensively evaluated for plasma and urine samples separately, providing satisfactory results in terms of linearity (R² of 0.991-0.999), process efficiency (>81%), trueness (recoveries between 85% and 120%), intra-day precision (relative standard deviation, RSD < 18%), inter-day precision (RSD < 21%) and method quantification limits (ranging between 20 ng·L(-)¹ and 40 ng·L(-)¹ in plasma and between 5 ng·L(-)¹ and 20 ng·L(-)¹ in urine). Finally, the highly sensitive validated method was applied to some urine and plasma samples from different donors

Library between language and representation. A philosophical investigation of library science

L'autore esplora l'universo bibliografico attraverso un approccio che utilizza strumenti mutuati dalla filosofia e dalle scienze cognitive. Gli studi sul funzionamento del linguaggio e della mente umana possono presentare analisi valide anche per le realtà rappresentate dal catalogo, dalla raccolta documentaria e dagli utenti. Il linguaggio naturale è stato assimilato da alcune branche della filosofia del linguaggio ad un "gioco" che segue determinate regole, le quali hanno a loro volta uno stretto rapporto con il contesto sociale in cui tale gioco è giocato. Allo stesso modo, il catalogo richiede normative e standard catalografici che tengano conto delle finalità della biblioteca in cui il catalogatore opera e delle caratteristiche dell'utenza a cui la biblioteca si rivolge. Non esiste catalogo che possa rappresentare l'universo dei documenti, ma cataloghi che rappresentano diversi "universi", multiformemente collegati. La classificazione del sapere non è una classificazione della realtà e la sua struttura è solo uno dei possibili indici finalizzati a un'organizzazione delle informazioni contenute nei documenti. Piuttosto che alla scoperta di modelli unici del sapere l'indagine sulla catalogazione dovrebbe indirizzarsi verso la comprensione profonda della natura, della funzione e delle fruizioni possibili della biblioteca, senza rinunciare alla valenza identitaria della biblioteca in quanto istituto sociale e della biblioteconomia in quanto disciplina accademica.The article explores the bibliographic universe using philosophical and cognitive science medium. The studies on the operation of language and human mind can offer valid analysis for the realities represented in library catalogues, documentation collections, and users. Natural language has been ingested by some branches of Philosophy of Language as a "game" which follows specific rules in a very close relation with the respective social contest. In the same way, the catalogue requires standards that takes into account the purposes of a library and the peculiarity of its users. A research on cataloguing should consider a deep understanding on the functions and on the use of a library (rather than looking for unique models), without renouncing to the role of the library as a social institution, and of the library science as an academic subject

Canudos como cidade iletrada: Euclides da Cunha na urbs monstruosa

Euclides da Cunha interpreted the Canudos war (1896-7) on the basis of oral sources to establish the messianic character of the movement. He relied on folk poems and apocalyptic prophecies, that he attributed to Antônio Conselheiro, in order to create, in Os sertões (Rebellion in the backlands), a gloomy portrait of the leader of the community. Conselheiro's sermons, collected in two manuscript volumes to which Euclides da Cunha did not have access, reveal a religious leader very different from the mystical fanatic presented in Os sertões. These sermons indicate that the leader of Canudos was a learned backlander, capable of expressing his political and religious views, that were related to a traditional Catholicism common among the clergymen of the 19th-century.Euclides da Cunha interpretou o conflito de Canudos (1896-7) a partir de fontes orais, para afirmar o caráter sebastianista e messiânico do movimento. Baseou-se em poemas populares e em profecias apocalípticas, que atribuiu a Antônio Conselheiro, para criar, em Os sertões (1902), um retrato sombrio do líder da comunidade. Os sermões do Conselheiro, recolhidos em dois volumes manuscritos a que Euclides da Cunha não teve acesso, mostram um líder religioso, muito diferente do fanático místico retratado em Os sertões. Revelam um setanejo letrado, capaz de exprimir suas concepções políticas e religiosas, vinculadas a um catolicismo tradicional, corrente na igreja do século XIX