The tree-based data structure of -tree for propositional formulas is introduced in an improved and optimised form. The -trees allow a compact representation for negation normal forms as well as for a number of reduction strategies in order to consider only those occurrences of literals which are relevant for the satisfiability of the input formula. These reduction strategies are divided into two subsets (meaning- and satisfiability-preserving transformations) and can be used to decrease the size of a negation normal form A (...) at (at most) quadratic cost. The reduction strategies are aimed at decreasing the number of required branchings and, therefore, these strategies allow to limit the size of the search space for the SAT problem. (shrink)

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PurposeThe relation between fear of childbirth and gestational age is inconclusive, and self-reported need for help regarding this fear has never been investigated. This study aimed to determine the prevalence and course of FoC according to gestational age, to identify risk factors for the development of FoC, the influence of this fear on preferred mode of delivery, and self-reported need for help.MethodsNulliparous pregnant women of all gestational ages completed an online survey. The study consisted of a cross-sectional and a longitudinal (...) analysis. Women who completed the survey in the first or second trimester were approached again in their third trimester. The Wijma Delivery Expectancy Questionnaire Version A was used with a cut-off score ≥ 85 to define presence of fear of childbirth. Questionnaires indexing social support, anxiety, symptoms of depression, preferred mode of delivery, and self-reported need for help were included.ResultsIn total, 364 women were enrolled at T0, and 118 out of 184 eligible women were included in the longitudinal analysis. Point prevalence of FoC at T0 was 18.4% with no significant difference between trimesters. In the longitudinal sample, the prevalence of FoC decreased from 18.6% to 11.0%, p = 0.004. Although mean scores for FoC decreased significantly, p < 0.001, scores increased in 41 women. The presence of FoC was associated with elevated anxiety, less family support, prenatal care of the obstetrician by choice, preference for a cesarean section, and for pain relief. Women with FoC were more likely to actively seek for help compared to women without FoC.ConclusionWhile FoC is common in each trimester, prevalence decreases over the course of pregnancy. Women with FoC are often actively seeking for help, suggesting that this fear should be addressed better, and help should be offered accordingly. (shrink)

Context: Josef Mitterer has become known for criticizing the main exponents of analytic and constructivist philosophy for their blind adoption of a dualistic epistemology based on an alleged ontological difference between world and words. Judith Butler, who has developed an influential model of (de)constructivist feminism and has been labeled a linguistic constructivist, has been criticized for sustaining exactly what, according to Mitterer, most modern philosophy fails to acknowledge: namely that there is no ontological difference between objective facts beyond language and (...) the discourse about these facts. Problem: In the scholarly discussion on non-dualism, two main questions have been raised: Where does Mitterer’s basic consensus, i.e., the starting-point description, come from? and: What does it mean, to say that further descriptions change their object? Method: Comparative analysis of the core concepts of Mitterer’s and Butler’s work in the context of the history of ideas. Results: Butler’s conception of a performative production of objectivity through discursive and non-discursive iterated practices can be interpreted as an illustration of Mitterer’s claim that descriptions change their object. The problem of where Mitterer’s starting-point descriptions come from can be solved by adopting Butler’s concept of culturally inherited practices. (shrink)

Given its non-invasive nature, there is increasing interest in the use of transcutaneous vagus nerve stimulation across basic, translational and clinical research. Contemporaneously, tVNS can be achieved by stimulating either the auricular branch or the cervical bundle of the vagus nerve, referred to as transcutaneous auricular vagus nerve stimulation and transcutaneous cervical VNS, respectively. In order to advance the field in a systematic manner, studies using these technologies need to adequately report sufficient methodological detail to enable comparison of results between (...) studies, replication of studies, as well as enhancing study participant safety. We systematically reviewed the existing tVNS literature to evaluate current reporting practices. Based on this review, and consensus among participating authors, we propose a set of minimal reporting items to guide future tVNS studies. The suggested items address specific technical aspects of the device and stimulation parameters. We also cover general recommendations including inclusion and exclusion criteria for participants, outcome parameters and the detailed reporting of side effects. Furthermore, we review strategies used to identify the optimal stimulation parameters for a given research setting and summarize ongoing developments in animal research with potential implications for the application of tVNS in humans. Finally, we discuss the potential of tVNS in future research as well as the associated challenges across several disciplines in research and clinical practice. (shrink)

The geometric system of deduction called N-Graphs was introduced by de Oliveira in 2001. The proofs in this system are represented by means of digraphs and, while its derivations are mostly based on Gentzen's sequent calculus, the system gets its inspiration from geometrically based systems, such as the Kneales' tables of development, Statman's proofs-as-graphs, Buss' logical flow graphs, and Girard's proof-nets. Given that all these geometric systems appeal to the classical symmetry between premises and conclusions, providing an intuitionistic version of (...) any of these is an interesting exercise in extending the range of applicability of the geometric system in question. In this article we produce an intuitionistic version of N-Graphs, based on Maehara's LJ' system, as described by Takeuti. Recall that LJ' has multiple conclusions in all but the essential intuitionistic rules, e.g., implication right and negation right. We show soundness and completeness of our intuitionistic N-Graphs with respect to LJ'. We also discuss how we expect to extend this work to a version of N-Graphs corresponding to the intuitionistic logic system FIL (Full Intuitionistic Logic) of de Paiva and Pereira and sketch future developments. (shrink)

Given its non-invasive nature, there is increasing interest in the use of transcutaneous vagus nerve stimulation across basic, translational and clinical research. Contemporaneously, tVNS can be achieved by stimulating either the auricular branch or the cervical bundle of the vagus nerve, referred to as transcutaneous auricular vagus nerve stimulation and transcutaneous cervical VNS, respectively. In order to advance the field in a systematic manner, studies using these technologies need to adequately report sufficient methodological detail to enable comparison of results between (...) studies, replication of studies, as well as enhancing study participant safety. We systematically reviewed the existing tVNS literature to evaluate current reporting practices. Based on this review, and consensus among participating authors, we propose a set of minimal reporting items to guide future tVNS studies. The suggested items address specific technical aspects of the device and stimulation parameters. We also cover general recommendations including inclusion and exclusion criteria for participants, outcome parameters and the detailed reporting of side effects. Furthermore, we review strategies used to identify the optimal stimulation parameters for a given research setting and summarize ongoing developments in animal research with potential implications for the application of tVNS in humans. Finally, we discuss the potential of tVNS in future research as well as the associated challenges across several disciplines in research and clinical practice. (shrink)

Paul de Rapin-Thoyras's History of England has hitherto occupied a marginal position in most accounts of eighteenth-century historiography, despite its considerable readership and influence. This paper charts the publication history of the work, its politics and style, and the methods through which Rapin's British translators and booksellers successfully proposed the work as the model for new historical enquiry, and its author as the model for a modern historical writer. It is further argued that David Hume's writings and letters relating to (...) his History of England suggest a direct and critical engagement with Rapin's work, and with the identity of the historian, as it had been constructed through Rapin's success. By focussing on the mechanisms of production and circulation, and the impact which these had on the practice of historical writing in the eighteenth century, the paper aims to demonstrate the value of applying social–historical methods to the study of historical writing. (shrink)