1,720,955 research outputs found
A Cr2O3-doped graphene sensor for early diagnosis of liver cirrhosis: a first-principles study
No full textLiver cirrhosis is among the leading causes of death worldwide. Because of its asymptomatic evolution, timely diagnosis of liver cirrhosis via non-invasive techniques is currently under investigation. Among the diagnostic methods employing volatile organic compounds directly detectable from breath, sensing of limonene (C10H16) represents one of the most promising strategies for diagnosing alcohol liver diseases, including cirrhosis. In the present work, by means of state-of-the-art Density Functional Theory calculations including the U correction, we present an investigation on the sensing capabilities of a chromium-oxide-doped graphene (i.e., Cr2O3-graphene) structure toward limonene detection. In contrast with other structures such as g-triazobenzol (g-C6N6) monolayers and germanane, which revealed their usefulness in detecting limonene via physisorption, the proposed Cr2O3-graphene heterostructure is capable of undergoing chemisorption upon molecular approaching of limonene over its surface. In fact, a high adsorption energy is recorded (∼−1.6 eV). Besides, a positive Moss-Burstein effect is observed upon adsorption of limomene on the Cr2O3-graphene heterostructure, resulting in a net increase of the bandgap (∼50%), along with a sizeable shift of the Fermi level toward the conduction band. These findings pave the way toward the experimental validation of such predictions and the employment of Cr2O3-graphene heterostructures as sensors of key liver cirrhosis biomarkers
Hardware Design with Real-Time Implementation for Security of Medical Images and EPMR
No full textIn this article, an FPGA-based hardware prototype design has been proposed and implemented in real time for the security of the Electronic Patient Medical Record. This proposed hardware can be integrated into various medical image scanning instruments like X-ray, ultrasonography, magnetic resonance imaging, and computed tomography machines, which can embed the health record of a patient into his/her scanned medical images in real time. The FPGA prototype was implemented using Xilinx Spartan-3E FPGA. The hardware resource utilization results have been observed to be low and practically viable. High operating speed up to 245 MHz (for joint embedding-cum-encryption process) and up to 252 MHz (for joint decoding-cum-decryption process) is achieved, with a respective low power consumption of 95 mW and 82 mW. Extracting the medical data is possible using a key, generated within the proposed algorithm using the patient’s fingerprint. The proposed hardware architecture is the first architecture for the algorithm proposed in this article to the best of our knowledge
Modeling of Thermal Properties of Semiconducting Monolayer MoSe2and WSe2
No full textIn this work, first-principles based calculations of thermal properties of monolayer group-6 transition metal dichalcogenides (TMDs) viz. MoSe2 and WSe2 are reported. Owing to the distinctive electronic, optical, and thermal properties, the TMDs have emerged as the suitable candidates for designing next-generation ultra-thin nanodevices. Thus, accurate estimation of heat dissipation across any two-dimensional (2D) atomically thin layer has become crucial. In order to determine thermal transport, we need to assess different intrinsic properties of the 2D materials. A large value of thermal conductivity will ensure better heat transmission across the channel of any high-performance device. Therefore, modeling of different parameters such as mode dependent group velocities, phonon mean free path, etc. has become extremely important.In this study, we adopt a multi-scale modeling approach for determining phonon group velocities of semiconducting MoSe2 and WSe2 crystals. Room temperature air stability of single layer MoSe2 and single layer WSe2 are comparable with that of the other group-6 TMDs. Moreover, the semiconducting 2H phases of both the crystals are dynamically stable. The results reported in this work will be useful for developing closed-form expression of specific heat and thermal conductivity of semiconducting TMDs which are the potential channel materials for sub-10 nm channel length transistors
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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