179,559 research outputs found
Electroencephalogram signal recording and processing for subjects’ engagement analysis with visual content
No full textSince attention affects cognitive performance, it is essential to identify and keep track of students' attention during learning. The ability of interactive learning systems to modify tutoring content, provide efficient help strategies, and enhance learning outcomes may thus be made possible by getting a detailed understanding of a learner's mental state. In computer-based learning environments, keeping track of students' mental states is vital. This research is an investigation into the viability of using active learning to enhance student engagement index when exposed to varied visual stimuli. The study involves gathering EEG data from twenty participants (ten men and ten women) while they rest and interact with various virtual learning tools. The Allengers Neuro PLOT, a 28-channel wet electrode system, was used to collect the EEG data. EEG data under resting and audio-visual stimuli, both raw and pre-processed, are included in the work that follows. The research community will have access to the recorded data, which is supported by an advanced EEG data pre-processing pipeline.Note: The recorded EEG data uploaded here are referred to by the following abbreviations:Sub: SubjectN: Non-Processed/Raw DataP: Processed DataBL: BaselineIT: InfotainmentET: EntertainmentAL: Active LearningEC: Educational ContentAP: Absolute PowerRP: Relative PowerSpect: Spectral ImageExample: Sub1N_ET: Subject 1, Non-Processed, ET: Entertainmen
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
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
Get PDFBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
Chaos to order: Role of Toxin producing phytoplankton in aquatic systems, Nonlinear Analysis: Modelling
No full textAbstract. Toxin producing phytoplankton (TPP) plays an important role in aquatic systems. To observe the role of TPP, we consider a three species food chain model consisting of TPP-zooplankton-fish population. The similar type of model considered by Upadhyay et al
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
Letter from R. R. Zellick, Assistant Trust Officer, Anglo California National Bank of San Francisco, to Joseph R. Goodman, October 2, 1942
No full textLetter from R. R. Zellick, Assistant Trust Officer at The Anglo California National Bank of San Francisco, to Joseph R. Goodman, regarding property owned by Dave Tatsuno. Zellick mentions a dispute between current tenants and Tatsuno, and that Tatsuno has asked Goodman to help locate trustworthy tenants.Personal correspondence, organizational records, government documents, publications, and other papers created or collected by Joseph R. Goodman documenting the forced removal and incarceration of Japanese Americans during World War II, as well as organized resistance to incarceration. Included in the collection are records of the Japanese Young Men's Christian Association and the Japanese American Citizens' League in San Francisco, including papers of the Japanese YMCA's executive secretary Lincoln Kanai; Sakai family papers; Goodman's correspondence to and from Japanese American incarcerees, organizations opposing forced removal and incarceration of Japanese Americans, the War Relocation Authority, and others; publications, photographs, and ephemera from the Topaz Relocation Center, where Goodman taught high school; War Relocation Authority records and publications; and newspaper clippings, pamphlets, and reports about forced removal and incarceration created by various government, religious, and civic organizations, in California and nationwide
Barium isotope abundances in meteorites and their implications for early Solar System evolution
No full textSeveral nucleosynthetic processes contributed material to the Solar System, but the relative contributions of each process, the timing of their input into the solar nebula, and how well these components were homogenized in the solar nebula remain only partially constrained. The Ba isotope system is particularly useful in addressing these issues because Ba isotopes are synthesized via three nucleosynthetic processes (s-, r-, p-process). In this study, high precision Ba isotope analyses of 22 different whole rock chondrites and achondrites (carbonaceous chondrites, ordinary chondrites, enstatite chondrites, Martian meteorites, and eucrites) were performed to constrain the distribution of Ba isotopes on the regional scale in the Solar System. A melting method using aerodynamic levitation and CO2-laser heating was used to oxidize SiC, a primary carrier of Ba among presolar grains in carbonaceous chondrites. Destruction of these grains during the fusion process enabled the complete digestion of these samples. The Ba isotope data presented here are thus the first for which complete dissolution of the bulk meteorite samples was certain. Enstatite chondrites, ordinary chondrites, and all achondrites measured here possess Ba isotope compositions that are not resolved from the terrestrial composition. Barium isotope anomalies are evident in most of the carbonaceous chondrites analyzed, but the Ba-135 anomalies are generally smaller than previously reported for similarly sized splits of CM2 meteorites. Variation in the size of the Ba-135 anomaly is also apparent in fused samples from the same parent body (e.g., CM2 meteorites) and in different pieces from the same meteorite (e.g., Orgueil, CI). Here, we investigate the potential causes of variability in Ba-135, including the contribution of radiogenic Ba-135 from the decay of Cs-135 and incomplete homogenization of the presolar components on the <0.8 g sample scale. (C) 2015 Elsevier Ltd. All rights reserved
Towards a Tailored Sensor Network for Fire Emergency Monitoring in Large buildings
Get PDFPresentation by Dr. Rochan R. Upadhyay at IEEE-WRECOM on joint work carried out with Dr. Athanasia Tsertou.In this presentation, we describe some of the ongoing efforts in developing a wireless sensor network tailored specifically for fire emergency monitoring. Network simulations of a dense sensor network with a flat architecture and using off the shelf protocols such as Wi-fi and Zigbee reveals the serious performance degradtion due to power consumption and packet losses caused by simultaneous collisions. By performing computational simulations of several fire scenarios, we show that spatio-temporal collisions exist in the sensed data. These can be leveraged in communication protocols for more efficient transmissions. While we do not propose algorithms for achieving this, our study highlights the need to consider statistical properties of the fire data in the communication protocols
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
sj-docx-1-jiapac-10.1177_23259582211073393 - Supplemental material for A Primary Care Intervention to Increase HIV Pre-Exposure Prophylaxis (PrEP) Uptake in Patients with Syphilis
No full textSupplemental material, sj-docx-1-jiapac-10.1177_23259582211073393 for A Primary Care Intervention to Increase HIV Pre-Exposure Prophylaxis (PrEP) Uptake in Patients with Syphilis by Ryan Bonner, Jessica Stewart, Ashish Upadhyay, R. Douglas Bruce and Jessica L. Taylor in Journal of the International Association of Providers of AIDS Care (JIAPAC)</p
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