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Suprapapillary puncture of the common bile duct for selective biliary access: a revival of an old technique.
No full textEnhancing Deep Sequence Generation with Logical Temporal Knowledge
Full text linkDespite significant advancements in deep learning for sequence forecasting, neural models are typically trained only on data, and the incorporation of high-level prior logical knowledge in their training is still an hard challenge. This limitation hinders the exploitation of background knowledge, such as common sense or domain-specific information, in predictive tasks performed by neural networks. In this work, we propose a principled approach to integrate prior knowledge in Linear Temporal Logic over finite traces (\ltlf) into deep autoregressive models for multistep symbolic sequence generation (i.e., suffix prediction) at training time. Our method involves representing logical knowledge through continuous probabilistic relaxations and employing a differentiable schedule for sampling the next symbol from the network. We test our approach on synthetic datasets based on background knowledge in Declare, inspired by Business Process Management (BPM) applications. The results demonstrate that our method consistently improves the performance of the neural predictor, achieving lower Damerau-Levenshtein (DL) distances from target sequences and higher satisfaction rates of the logical knowledge compared to models trained solely on data
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Service-Oriented Computing - ICSOC 2013 Workshops - CCSA, CSB, PASCEB, SWESE, WESOA, and PhD Symposium, Berlin, Germany, December 2-5, 2013. Revised Selected Papers
No full textVariations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Monitoring Arithmetic Temporal Properties on Finite Traces
Full text linkWe study monitoring of linear-time arithmetic properties against finite traces generated by an unknown dynamic system. The monitoring state is determined by considering at once the trace prefix seen so far, and all its possible finite-length, future continuations. This makes monitoring at least as hard as satisfiability and validity. Traces consist of finite sequences of assignments of a fixed set of variables to numerical values. Properties are specified in a logic we call ALTLf, combining LTLf (LTL on finite traces) with linear arithmetic constraints that may carry lookahead, i.e., variables may be compared over multiple instants of the trace. While the monitoring problem for this setting is undecidable in general, we show decidability for (a) properties without lookahead, and (b) properties with lookahead that satisfy the abstract, semantic condition of finite summary, studied before in the context of model checking. We then single out concrete, practically relevant classes of constraints guaranteeing finite summary. Feasibility is witnessed by a prototype implementation
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