Langhian rays (Chondrichthyes, Batomorphii) from Brielas, Lower Tagus Basin, Portugal

The Langhian Vc unit of Brielas section (Caparica road, Almada), in the marine Miocene of the Lower Tagus Basin (West Portugal), is rich in batoid species. In this study, batoids are represented by 149 isolated fossil teeth and a single fossil dental plate collected from a bulk sample of washed and sorted sediment. A total of 12 species belonging to the orders Rhinopristiformes, Rajiformes, Torpediniformes and Myliobatiformes were identified. All genera and some species are known to have extant representatives. Aetobatus cappettai Antunes and Balbino, 2006, is described now from Langhian material which suggests it is older than previously supposed. The biogeographic ranges, environmental constraints and behaviour of the species described in this study point out to an infralittoral environment characterized by the dominance of warm water conditions, where episodic upwelling contributed to the occurrence of different types of batoids coexisting in the same habitat

Fontes alternativas de fósforo no desempenho e características dos ossos de suínos em crescimento e terminação.

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Pilot, Rollout and Monte Carlo Tree Search Methods for Job Shop Scheduling

Greedy heuristics may be attuned by looking ahead for each possible choice, in an approach called the rollout or Pilot method. These methods may be seen as meta-heuristics that can enhance (any) heuristic solution, by repetitively modifying a master solution: similarly to what is done in game tree search, better choices are identified using lookahead, based on solutions obtained by repeatedly using a greedy heuristic. This paper first illustrates how the Pilot method improves upon some simple well known dispatch heuristics for the job-shop scheduling problem. The Pilot method is then shown to be a special case of the more recent Monte Carlo Tree Search (MCTS) methods: Unlike the Pilot method, MCTS methods use random completion of partial solutions to identify promising branches of the tree. The Pilot method and a simple version of MCTS, using the $\varepsilon$-greedy exploration paradigms, are then compared within the same framework, consisting of 300 scheduling problems of varying sizes with fixed-budget of rollouts. Results demonstrate that MCTS reaches better or same results as the Pilot methods in this context.Comment: Learning and Intelligent OptimizatioN (LION'6) 7219 (2012

Chatbots’ greetings to human-computer communication

In the last years, chatbots have gained new attention, due to the interest showed by widely known personalities and companies. The concept is broad, and, in this paper we target the work developed by the (old) community that is typically associated with chatbot’s competitions. In our opinion, they contribute with very interesting know-how, but specially with large-scale corpora, gathered by interactions with real people, an invaluable resource considering the renewed interest in Deep Nets.info:eu-repo/semantics/publishedVersio

Addressing health information privacy with a novel cloud-based PHR system architecture

Patient Health Records (PHRs) shift the ownership of health data from health providers to patients. Such a shift poses important challenges from the data privacy point of view. Patients would like to be able to selectively reveal information to other stakeholders and, at the same time, be assured that their health information will not be used improperly once shared. Current PHR systems partially fail to satisfy these requirements. In this paper, we show that both requirements can be satisfied fully when adopting a novel cloud-based PHR system architecture.We expain the role of remote virtual machines in this architecture and use interaction models to reason about privacy implications. Finally, we evaluate MyPHRMachines, a prototypical implementation of the architecture: we demonstrate that the system enables the execution of third party genome analysis services on patientowned genome data while ensuring that (1) such services cannot maliciously store this data and (2) patients can show the analysis results to experts without sharing along their full genome

Chronic Enteroviral Meningoencephalitis in a Boy with X-Linked Agammaglobulinemia

Os autores apresentam um caso clínico de encefalite crónica a enterovírus num rapaz de 9 anos com agamaglobulinémia congénita ligada ao cromossoma X (doença de Bruton). Apesar da terapêutica intraventricular com doses elevadas de gamaglobulina, registou-se uma progressão da doença com deterioração neurológica maciça e morte. Discutem-se os aspectos diagnósticos e terapêuticos desta situação

Cascalho de Perfuração de Poços de Petróleo e Gás. Estudo do Potencial de Aplicação em Concreto.

A perfuração de poços de petróleo gera diversos resíduos entre os quais estão os fluidos e cascalhos de perfuração. A administração desses resíduos tem sido um problema para a indústria de petróleo e gás por causa da quantidade gerada e seus contaminantes, que podem ser orgânicos e inorgânicos. Os estudos para o reuso do cascalho em materiais de construção são recentes. Eles apontam alternativas para a construção de sub-base de pavimentação, materiais cerâmicos e a base de cimento. Esta pesquisa teve como objetivo avaliar o comportamento de dois tipos de cascalhos em substituição e adição em concretos não armados. Foram realizados ensaios para caracterização dos materiais utilizados na produção dos concretos e em especial no cascalho de perfuração, além dos ensaios de controle tecnológico e ambientais nos concretos. Os resultados apontaram que o uso dos cascalhos em materiais a base de cimento é vinculado a sua caracterização prévia. A substituição dos cascalhos da primeira fase da perfuração por areia altera significativamente a reologia do concreto fresco. As proporções testadas não comprometem as propriedades mecânicas dos concretos. Alterações na microestrutura só foram observadas nos concretos com adição de cascalhos da terceira fase da perfuração. Essas se tornaram mais porosas e a formação das fases se deu de forma mais lenta. O método qualitativo de detecção de cloretos não identificou cloretos livres nas amostras de concreto. Pode-se concluir que é possível a adição e substituição de cascalhos de perfuração em concretos para fins não estruturais nos teores testados

Viabilidade econômica do Adlay na alimentação de suínos em crescimento e terminação.

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Composição química, energética e proteina discutível de alguns alimentos para suínos.

21 alimentos utilizados na alimentação de suínos foram determinados, a analise proximal, os minerais, aminoacidos, a matéria seca digestivel o coeficiente de digestibilidade da proteina bruta a energia digestivel e a energia metabolizavel.Resumo

Trophic plasticity of omnivorous fishes in natural and human‐dominated landscapes

The persistence of diverse communities and functioning ecosystems under increasing anthropogenic pressure relies on food web rewiring and the ability of animals to expand or change their diet in disturbed ecosystems. We combined a suite of diet tracing techniques to study trophic plasticity in omnivorous fishes, ecomorphologically similar species with high competition potential, across different human land uses in subtropical streams. We found that the proportion of native forest cover, associated with intensive land use, altered the isotopic composition of fishes, which were more enriched in 13C, without affecting the carbon isotope ratios of their prey and basal resources. There was also evidence for a nonlinear effect of native forest cover on the δ15N values of basal resources, macroinvertebrates, and omnivorous fishes, indicating that nutrient pollution from agriculture propagated through stream food webs. The most widely distributed fish species shifted their diet from autochthonous resources to terrestrial invertebrates and sedimentary organic matter in disturbed streams. Moreover, the isotopic niche of this fish species was broader in streams with higher fish species richness, indicating the combined impacts of environmental change and competition on species coexistence. Therefore, our findings showed that the dominance and trophic niche breadth of dominant omnivores depend not only on the availability of resources but also on the interactions with their putative competitors