1,721,019 research outputs found
Data from: Energy-mediated responses to changing prey size and distribution in marine top predator movements and population dynamics
No full textAccompanying scripts and data included in: Gallagher, C.A., Chimienti, M., Grimm, V., & Nabe-Nielsen, J. 2021. Energy‐mediated responses to changing prey size and distribution in marine top predator movements and population dynamics. Journal of Animal Ecology. DOI: 10.1111/1365-2656.1362
Design of Experiment for a Cryogenic Drilling of Polyethylene Components
No full textThe paper presents an optimisation study for a standard machining operation on polyethylene components. The main
problem of such kind of machining is the chip removal, which can be critical also for safety reasons. Fluent chips may also represent
a critical issue to face for process time reduction, that can bring sometimes non optimal solutions from the sustainability point of
view. The design of experiment performed aims at showing how cryogenic machining operations is a viable alternative to such a kind
of problems, addressing either the ecological footprint goal or the economic issue as well. A test case based on real industrial
operating conditions were performed to this aim
A layout-analysis based system for document image retrieval
No full textThis paper presents new system for document image retrieval, based on layout-analysis. The system, that is well suited for commercial form retrieval, uses Radon Transform for layout description and Dynamic Time Warping for document image matching. The experimental results, that were conducted using real and simulated data sets, demonstrate the proposed approach is effective and robust with respect to different classes of commercial forms and shifted/rotated document images
Progress of tool condition monitoring in drilling
Full text linkThe capability of drill status monitoring has a strong economic potential, since large benefits can be obtained when exploiting tools up to their real end-of-life; this can be done once the decay mechanism is clearly defined and understood. A large amount of research activities has been devoted so far in the last decades, particularly for drilling operations, since tool management, usually, relies on a conservative evaluation of tool-life, because of the empirical approach in evaluating the effects of failure mechanisms bringing to sudden failures or decay; this fact leads to an unnecessarily high number of changes and to increase of cost impacts. For this reasons, particularly in automated production systems, efforts in research should be devoted on the measurement of drill-status, which reflects directly on surface features and indirectly on the quality of the holes manufactured. This paper presents a benchmark of a large number of existing drill-decay measurement techniques (DDMT) proposed so far in scientific papers and contributions, providing an up-to-date analysis of main factors which characterized the applicability of DDMT to automated production systems as well as the pro and cons of principal technologies available. The outcome of the work is thus a technical requirement specification useful to provide new hints for realising a reliable wear monitoring system for drilling operations, potentially applicable to automated production system
Evaluation of Ontology Building Methodologies: a Method based on Balanced Scorecards
No full textOntology building methodologies concern techniques and methods related to ontology creation that starts from capturing ontology users' requirements and concludes by releasing the final ontology. Despite the several ontology building methodologies (OBMs) developed, endowed with different characteristics, there is not yet a method to evaluate them. This paper describes an evaluation method of OBMs based on Balanced Scorecards (BSCs), a novel approach for strategic management of enterprises that we apply to the assessment of OBMs. Then, as a case study, the proposed evaluation method is applied to the UPON OBM. Finally, we show the major strengths of the BSCs' multi-disciplinary approach
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
Variations 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
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