1,720,966 research outputs found
Characterization of the 3M Scotch-WeldTM 7260 B/A epoxy adhesive by cohesive damage models and application to a full-scale bonded sub-structure
Full text linkDetection of tricuspid valve prolapse by M-mode, two-dimensional and Doppler echocardiography.
No full textAccuracy of Doppler echocardiographic estimates of pulmonary-to-systemic flow ratios in patients with atrial septal defects.
No full textAssessment of pulmonary regurgitation by continous wave and pulsed Doppler echocardiography.
No full textExperiments on the combined use of a double-sided pressure-sensitive tape and an epoxy adhesive to reduce handling time
Full text linkIn many industrial assemblies with structural adhesives, the handling time, i.e. the time to safely move adhesively bonded parts, may slow down manufacturing process and result into additional costs. For that reason, in some cases, the traditional mechanical connections (rivets, bolts, welds) are still preferable when the structure must be completed in a short time. In this work a new type of hybrid joint, characterized by the combined use of an epoxy adhesive and a double-sided pressure-sensitive tape, is proposed and characterized by experimental tests on single-lap joints with a large overlap. The results showed that these hybrid joints allow for reducing the handling time of the joint, preserving approximately the same strength. The proposed solution exploits the non-uniform stress distribution in the bondline of a single-lap joint, resulting in a low stress area at the centre of the overlap. The presence of an adhesive tape in this region produced either a negligible or minor drop (~20%) in strength depending on the epoxy used, while provided the joint with sufficient strength for being handled before the full cure of the epoxy
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
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
The prediction of topologically partitioned intra-atomic and inter-atomic energies by the machine learning method kriging
No full textThe construction of a novel protein force field called FFLUX, which uses topological atoms, is founded on high-rank and fully polarizable multipolar electrostatics. The machine learning method kriging successfully predicts multipole moments of a given atom with as only input the nuclear coordinates of the atoms surrounding this given atom. Thus, trained kriging models accurately capture the polarizable multipolar electrostatics of amino acids. Here we show that successful kriging models can also be constructed for non-electrostatic energy contributions. As a result, the full potential energy surface of the (molecular) system trained for can be predicted by the corresponding set of atomic kriging models. In particular, we report on the performance of kriging models for each atom's (A) (1) total atomic energy (E-IQA), (2) intra-atomic energy (E-intra(A)) (both kinetic and potential energy), (3) exchange energy (V-XC(AA')) and (4) electrostatic energy (V-cl(AA')) of atom A with the rest of the system (A'), and (5) interatomic energy (V-inter(AA')). The total molecular energy can be reconstructed from the kriging predictions of these atomic energies. For the three case studies investigated (i.e. methanol, N-methylacetamide and peptide-capped glycine), the molecular energies were produced with mean absolute errors under 0.4, 0.8 and 1.1 kJ mol(-1), respectively
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