1,720,978 research outputs found
Microscopic Image Dataset of Coated Carbon Fiber/Epoxy Composites
No full textThis dataset includes microscopic image data of cross-sectional cuts prepared from fiber-composite samples composed of carbon fiber and epoxy matrix, coated with a polymer. The fiber composite did not undergo compaction during curing of the matrix, and the polymer coating was applied after curing. The cuts were made orthogonal to the fiber orientation. The cut surfaces were not polished after sawing. Multiple specimen were sampled at random positions. The images were acquired using a digital microscope and stored in TIF file format. The files are numbered to avoid duplicate filenames, but the numbering order is random. Each image includes an embedded scale bar
Supplemental Materials for: Exploring the Sustainability Potential of Lightweight Structures made from Phormium Tenax Fibers by Hybrid Coreless Filament Winding
No full textThis dataset includes geometrical, structural, and physical data on lattice fiber-composite structures made from different fiber materials using hybrid coreless filament winding. In total, 20 samples were manufactured and tested under axial compression, with 5 samples per fiber material. The material-invariant geometrical model of the samples was used for process simulation and is based on a network modeling approach. The dataset consists of three TSV files: coordinates, graph, and samples.
The coordinates file lists the Cartesian coordinates in mm for 16 nodes used in the computational design of the samples. Each node is identified by a unique integer and has x, y, and z coordinates, with the z-axis pointing upward. Nodes 1 to 4 represent the bottom corner points of the sample geometry, nodes 5 to 8 are the top corner points, and nodes 9 to 16 are intermediate crossing points at the outer edges. Additional crossing points within the structure are not included, as no fiber deflection occurs there. While the nominal edge length of the samples is 110 mm, the coordinates require more decimal places due to scaling applied to align the total fiber length with empirically determined values.
The graph file describes the connectivity between nodes, representing the fiber net as an undirected graph. It includes the node identifier as given in the coordinates file and lists the connected nodes as comma-separated integers. Each connection is bidirectional and mentioned twice in the file. Together with the coordinates file, this file allows reconstruction of the spatial configuration of the samples, as shown in Figure 3 of the associated paper.
The samples file contains single-source-of-truth data on the structural performance and physical composition of the 20 samples, labeled by material and sample ID number, with "H" indicating heavy yarn Phormium tenax and "L" indicating light yarn Phormium tenax. It includes the structural stiffness in N/mm, the maximum force in N sustained during destructive axial compression testing before initial structural collapse, and the masses of fiber and resin in g per sample. The composite mass is the sum of fiber and resin masses, and the fiber mass ratio can be calculated by dividing fiber mass by composite mass. The global warming potential (GWP) of each sample can be calculated by adding the GWP of fiber and resin components, determined by multiplying the fiber or resin mass by their material-specific mass-specific GWP values given in Section 3 of the associated paper.</p
Fiber-optic Strain Sensor Data Collected from Loop Specimens under Various Loading Conditions
No full textThis dataset includes strain and cross-sectional data from two CFRP loop specimens fabricated using coreless filament winding (CFW).
Specimen 1 features both anchors positioned in the same plane, resulting in a “straight” configuration, while specimen 2 has one anchor elevated, creating an “angled” configuration.
Both specimens contain fiber-optic sensors (FOS) operating on the Rayleigh backscattering principle. As the specimens are loops, both sides contain sensors.
The specimens were mechanically tested under different clamping conditions and at various non-destructive load levels. During testing, strain signals were obtained along the entire sensor length, mapped to the geometry, and resampled to 100 measurement points per segment. After testing, the specimens were cut, and their cross-sectional shapes, cut thicknesses, and FOS cross-sectional positions were measured.
The dataset contains 504 text files with strain data, each including a header indicating the measurement location and configurations. All strain values are provided in microstrain. Additionally, the dataset contains 76 text files with the coordinates of each cut (cut 1 of specimen 1 was removed). Each file includes the y and z coordinates in mm of one contour. To estimate the x coordinate, the thickness of the cuts, measured in µm, is provided in a tabular file. Another tabular file contains the positions of the FOS within each cross-section.
To aid understanding of the process and FOS implementation, two illustrative photos are included. To better visualize the sensor locations and configurations during testing, two additional figures are also provided in this dataset.</p
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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