1,720,954 research outputs found
Hybrid Organic-Inorganic Sol-Gel-Based Textile Finishing for Real-Time Sweat pH Monitoring in Wearable Health Systems
No full textFlexible wearable sweat sensors are advancing health monitoring by enabling continuous, non-invasive analysis of biomarkers. Advances in chemistry, materials science, and electronics have enabled the development of skinconformal devices with significant potential in diagnostics, athletic performance, and personalized care. Cellulosic textiles are optimal substrates due to their softness, breathability, and compatibility with functional coatings. This study reports the development of a durable, pH-responsive smart textile obtained by covalently grafting a halochromic dye onto cotton through sol-gel chemistry. Litmus, a naturally derived, non-toxic halochromic dye, was chemically functionalized via epoxy ring-opening of 3-glycidoxypropyltrimethoxysilane to produce a hybrid silane-dye molecule. The functionalized dye was placed onto cotton using a paddry-cure sol-gel process optimized for coating stability and laundering durability. Morphological and spectroscopic analyses implied uniform deposition and chemical integrity. FTIR and UV-vis spectroscopy verified the formation of siloxane linkages and the retention of the dye’s pH responsiveness within the physiological range (pH 4–8). SEM imaging revealed a continuous xerogel layer, indicating robust chemical anchoring. Colorimetric measurements demonstrated a pronounced
and reversible chromatic transition, with ΔE values exceeding 20 units
between acidic and slightly basic condition. The obtained coating maintained its pH responsiveness after a one washing cycle and demonstrated high repeatability, with colour deviation of less than 5% across five pH cycles. These findings highlight the potential of this halochromic textile platform for reliable, reusable, and wearable sensing applications
Siloxane-Based Sol-Gel Coatings for Fluorine-Free Water-Repellent Textiles
No full textThe growing global restriction of long-chain per- and polyfluoroalkyl substances (PFASs), a class of persistent, bioaccumulative chemicals widely used for water and stain repellency, has accelerated the search for safer, fluorine-free alternatives that maintain comparable water-repellent performance with lower environmental impact. In this study, a scalable sol-gel-based fluorine-free waterrepellent coating derived from triethoxy(octyl)silane (OS) and amino-terminated polydimethylsiloxane (APT-PDMS) was reported. The hybrid formulation was applied to cotton fabrics via a conventional pad-dry-cure process. The treated textiles showed high water contact angles (≥130°). Surface morphology and chemistry were evaluated using SEM-EDS, ATR-FTIR, and Raman spectroscopy, confirming uniform coating coverage and covalent bonding with the substrate. The treatment provides a non-toxic, fluorine-free, and industry-friendly solution for water-repellent textile finishing. These results confirm that the proposed one-step, water-based sol-gel method offers a sustainable and scalable approach for producing high-performance water-repellent finishes on natural textiles, offering a promising alternative to PFAS-based chemistries for outdoor apparel and technical textiles
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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