1,720,958 research outputs found
Implementation of an IoT Node for Biomedical Applications
No full textThe Internet of Things is an inter-networking of physical devices that communicate with each other through the Internet. The technological progress of the last few decades and more efficient wireless protocols led to an exponential growth of devices connected with an increasing amount of data exchanged across the globe. The birth of the IoT caused significant changes in different sectors, among which e-Health, involving big innovations in medical care, prevention and remote diagnosis. The goal of our project is to plan and implement an IoT node to collect clinical data and to detect atrial fibrillation through the analysis of electrocardiogram. We chose to focus on this particular arrhythmia because it represents one of the most common heart diseases. Additionally, it is often asymptomatic and associated with more dangerous illnesses. The device validation has been realized on a sample of patients affected by atrial fibrillation and other heart diseases, in order to evaluate the reliability of the obtained data and the efficiency of the algorithm. Finally, we have analyzed the advantages and limitations of the device, introducing potential future adjustments that could improve its functionality
From red to green: Smart thiol-porphyrin cryogels combining high mercury efficiency removal and visual material saturation alert
No full textA novel and smart methacrylic acid (MAA) based macroporous material functionalized with thiol groups (− SH) was developed to achieve highly efficient and selective removal of toxic Hg(II) ions from water. With the aim of visualizing the saturation of the active sites of the material in real-time, a porphyrin-based co-monomer was synthesized and included (only 0.25 % w/w) as a part of the co-polymeric structure. The porphyrin ring can capture Hg(II) ions, causing a color change from red to green. However, due to the higher affinity of Hg(II) towards thiol groups, the porphyrin will be able to interact with free Hg(II) only when the adjacent thiols are no longer available and, therefore, close to the complete saturation of − SH sites. The color shift alerts that the material is approaching saturation, hence, a regeneration step is necessary for subsequent adsorption cycles. The typical interconnected macroporous (3–23 μm) network of the cryogel allows fast water diffusion and easy access to the − SH and PORPH sites. Such design achieves an exceptional Hg(II) adsorption capacity (Qmax >1200 mg/g), calculated from the Langmuir isotherm model. The synthesized material shows high selectivity towards Hg(II) (S% > 95 %) in a solution with the simultaneous presence of other metal cation species. The kinetics of Hg(II)
capture, pH behavior, material dosage, and regeneration cycles were tested, highlighting its potential applicability across a broad pH range and its reusability for at least five cycles. These combined features underscore the superior performance of this advanced material compared to current state-of-the-art competitors
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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