1,720,976 research outputs found
Data for 'Integrated switching circuit for low-noise self-referenced mid-infrared absorption sensing using silicon waveguides'
No full textRaw data in .csv form for the figures in the paper, Yanli Qi et al. (2021)
'Integrated switching circuit for low-noise self-referenced mid-infrared absorption sensing using silicon waveguides', which is published in IEEE Photonics Journal.</span
Silicon mid-infrared waveguide-based bio-chemical sensors
No full textThe MIR spectral region contains strong absorption bands for many molecules and substances such as gases, liquids, proteins or drugs. Photonic devices operating in the MIR can be used, for example, in the treatment of aspirin and paracetamol overdose patients to identify and measure the concentrations of drugs in the body. The main aim of the project is to develop the MIR silicon photonic circuits for absorption spectroscopy, to be able to detect the quality and quantity of samples. By analysing the absorption spectra, identifiable absorption peaks and troughs at certain wavelengths can give knowledge of the composition of the sample present and the level of absorption can give information about the samples concentration. In the first part of this work, a preliminary demonstration of a silicon-on-insulator (SOI) device with a microfluidic channel is carried out in which the absorption spectra of different concentrations of water-IPA solutions are measured at wavelengths between 3.725 µm and 3.888 µm. The devices were used to detect an expected IPA absorption peak at 3.77 µm, and a concentration as low as 1.5% IPA in water (by volume) was detected. The second part of this work aims to reduce the noise floor. A new on-chip liquid sensor in the mid-infrared wavelength region was demonstrated, which uses Si waveguide switches and a microfluidic channel to allow for the circuit transmission to be switched between a reference waveguide and a sensing waveguide faster than fluctuations due to the noise. The results of this study show that the switch sensor can reduce the noise floor by a factor of 11 compared to a simple waveguide absorption sensor, which would ultimately allow the switch sensor to measure lower concentrations of a target analyte, and to reach a lower limit of detection. In future work, different methods of achieving longer wavelength (7-10 µm) sensing are discussed, with the current progress outlined
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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