1,720,988 research outputs found
Dynamic Bayesian Networks in Modelling Cellular Systems: a Critical Appraisal on Simulated Data.
No full textInfluence of heat-treated Cu-Be electrode on machining accuracy in ECMM with Monel 400 alloy
Get PDFMonel 400 is a nickel-copper alloy utilized in marine and oil refining industries owing to its high corrosion resistance and fire withstanding property. The machining of such higher strength material with complex shapes is possible with electrochemical micromachining (ECMM) process, since it can machine with less wear, better precision, micro-level hole profiles, no heat-affected zone and no thermal stresses. The present study was performed with machining of Monel 400 alloy in ECMM process with copper-beryllium wire electrode under various heat treatments, such as annealing, quenching and normalizing. The lower overcut can be obtained using quenched tool electrode when compared to the other treated tools and untreated tool electrode owing to its fine grain structure which restricts the flow of electrons to side of the tool. The conicity with normalized tool electrode is lower, since it exhibits high electrical conductivity by decreasing the distraction of electrons. Circularity with quenched tool electrode is lower due to its fine grain structure and higher electrical conductivity, since its localization effect increases causing uniform stray current
Influence of additive manufactured stainless steel tool electrode on machinability of beta titanium alloy
Get PDFAdditive manufacturing technology provides a gateway to completely new horizons for producing a wide range of components, such as manufacturing, medicine, aerospace, automotive, and space explorations, especially in non-conventional manufacturing processes. The present study analyzes the influence of the additive manufactured tool in electrochemical micromachining (ECMM) on machining beta titanium alloy. The influence of different machining parameters, such as applied voltage, electrolytic concentration, and duty ratio on material removal rate (MRR), overcut, and circularity was also analyzed. It was inferred that the additive manufactured tool can produce better circularity and overcut than a bare tool due to its higher corrosion resistance and localization effect. The additive manufactured tool can remove more material owing to its strong atomic bond of metals and higher electrical conductivity
Bayesian approaches for reverse engineering of cellular networks: a performance evaluation on simulated data.
No full textGoing Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Variations on the Author
Get PDF“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
Knowledge acquisition based on an epistemological model of medical reasoning
No full textThis paper describes a framework for medical knowledge acquisition able to help a domain expert to build a knowledge-based system. It is based on an epistemological model of medical reasoning and exploits different knowledge representation formalisms
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