1,720,956 research outputs found
Synthesis of Graphene Derivatives and The Designing of Hybrid Filter For Water Purification
No full textRecognizing the significance of graphene and its derivatives, the overarching goal is to develop advanced composites based on graphene derivatives that have improved properties for treating wastewater containing a variety of organic, inorganic, and /or pathogenic pollutants using various techniques. We have successfully synthesized graphene derivatives, including GO and rGO, from various organic sources like graphite, coal, and rice husk (G-GO, G-rGO, C-GO, C- rGO, RH-GO, RH-rGO). Our primary objective was to assess the effectiveness and quality of these synthesized materials for wastewater treatment. Subsequently, we employed the most efficient graphene derivatives (G-GO, G-rGO) in combination with a polyurethane (PU) polymer substrate to create a cost-effective material called GOPU. We further enhanced the performance of this graphene polyurethane composite by adjusting the size of the polyurethane substrate into micro-sized GOPU granules and by substituting GO or rGO with a highly efficient novel GO-Fe3O4-PEI composite for adsorptive removal of various organic, inorganic, and pathogenic pollutants. Additionally, wastewater treatment was performed using a ternary photocatalyst, TiO2@Gd2O3@g-C3N4, to promote photocatalytic destruction of a broad spectrum of organic, inorganic, and pathogenic pollutants. Further, to enhance the catalyst's efficiency and make it functional even without light, we introduced carbon nanotubes (CNT). We developed an innovative day-night photocatalyst through a hydrothermal method called g- C3N4@Gd2O3@CNT, which exhibited a post-illumination catalytic effect. Furthermore, we designed a unique photoreactor called a Flatplate photoreactor, featuring a flat glass reactor panel loaded with a polymeric day-night photocatalyst, g-C3N4@Gd2O3@CNT@PU. This photoreactor was employed for efficient wastewater treatment. This current study explores an innovative approach and route for wastewater treatment by leveraging newly developed composites based on graphene derivatives. It offers valuable insights into the effectiveness of multifunctional graphene derivative-based day-night catalysts in wastewater treatment and their versatile application in other fields
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
IoT-Enabled Stretchable Piezoresistive Sensor for Real-Time Monitoring of Fruit Growth and Human Physiology
No full textEnsuring quality control by identifying issues such as nutrient deficiencies and pest infestations helps in crop yield estimation for effective planning and resource management. However, the development of sensors for real-time continuous monitoring of fruit growth in an open environment has been a challenge. Herein, we propose a hydrophobic and stretchable piezoresistive sensor to monitor real-time fruit growth using graphene-silicone-based screen-printable paste (GSiCP) remotely. Graphene has been synthesized with a green approach utilizing an electrochemical exfoliation process, wherein no hazardous or strong acids were employed. The synthesized graphene has been characterized using X-ray (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Raman spectroscopy, and dynamic light scattering. The developed (GSiCP) sensors have shown a high sensitivity, stretchability, and cyclic durability of 2050, 125%, and 5000 cycles, respectively. The sensors show an exceptional minimal detection limit of 0.04%, which shows the capability of monitoring the slowest fruit growth. The GSiCP sensors have been used to monitor on-field the continuous real-time growth of fruit (brinjal) for 15 days using the Internet of Things (IoT). Further, the impact of an excess amount of fertilizer (urea) on fruit growth and plants has been investigated. Owing to the sensor’s merits, GSiCP sensors have shown applicability in monitoring physiological signals (radial artery pulse rate) and physical activities
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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