1,720,955 research outputs found
Enhancing Bubble Nucleation Analysis in Scintillating Bubble Chambers Through Ultrasonic Ping and Echo Signal Processing
No full textAt Northwestern University\u27s Physics and Astronomy Department, the Scintillating Bubble Chamber (SBC) team collaborates with Fermilab to detect dark matter using superheated noble liquids. Bubbles in these chambers emit acoustic chirps, often before they visibly form. Experimenters analyze these signals\u27 frequency and intensity to help identify bubble nucleation from dark matter interactions. Instead of relying solely on bubble-generated pulses, we aim to ultrasonically “ping” bubbles and analyze their echoes, distinguishing them from background noise to refine dark matter detection.
Using a Red Pitaya with piezo drivers and piezoelectrics for emission and reception, we generated and recorded arbitrary sinusoidal waveforms or chirps to capture echoes from bubbles. A high-voltage pulse from an ultrasonic emitter strikes the bubbles, producing echoes influenced by acoustic impedance differences. An ultrasonic sensor detects these weak signals, then pre-amplifies and filters to reduce noise. Although many range finders include built-in amplifiers, we added an external ultrasonic driver to boost performance. The Red Pitaya digitizes the amplified echoes for analysis, enhancing our understanding of how echo characteristics vary with environmental conditions—mirroring the bubble nucleation observed in the SBC’s chamber and representing potential dark matter interactions
Product Development in Airline Heavy Maintenance Planning
No full textAerostrat\u27s heavy maintenance planning solution, Aerros, assists airlines and MROs with heavy maintenance planning to maximize efficiency, forecast budgets, and aid in various decision-making for optimal yield and vendor support. Airlines must manage C-checks by tracking vendor updates, maintenance statuses, and deadlines, ensuring operational readiness and optimal fleet management. This is where Aerros tracks vendor updates, maintenance statuses, and optimal yields to assist customers. Over the course of six months, Aerostrat provided intensive training on MRO planning, airline etiquette, Aerros\u27 offerings, past clients, pricing information, data metrics, and opportunities to join customer meetings and sessions with United Airlines. After narrowing down research topics from faulty metrics, pricing strategies, and telemetry data for possible interface improvements, I focused on notifications and a simple metric display within the Aerros interface for customer summaries and customizable widgets to improve workflow efficiency. While focusing on product development, we conducted a research survey and organized stages from research to UI/UX implementation, refining product offerings for all scenarios through Figma wireframes sent to engineers. Customers will be able to use toggle buttons to customize dashboards and notifications to receive summarized updates, including change logs, progress digests, KPIs, unscheduled requirements, and real-time schedule changes
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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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