130,800 research outputs found
Case report -Cavernoma involving substantia nigra and nigrostriatal pathway as a rare cause of secondary parkinsonism with a 5 year follow up
No full textMeSH term explosion and author rank improve expert recommendations
Get PDFInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
Hypo-hyperparathyroidism with normal 1,25 dihydroxycholecalciferol.
No full textVitamin D deficiency and primary hyperparathyroidism (PHPT) are two common conditions, especially in postmenopausal women. Vitamin D deficiency is said to be even more frequent in PHPT patients than in the general population due to an accelerated conversion of 25-hydroxy vitamin D (25OHD) into calcitriol or 24-hydroxylated compounds
Preparing narrow velocity distributions for quantum memories in room-temperature alkali-metal vapors
Get PDFQuantum memories are a crucial technology for enabling large-scale quantum networks through synchronization of probabilistic operations. Such networks impose strict requirements on quantum memory, such as storage time, retrieval efficiency, bandwidth, and scalability. On- and off-resonant ladder protocols on warm atomic vapor platforms are promising candidates, combining efficient high-bandwidth operation with low-noise on-demand retrieval. However, their storage time is severely limited by motion-induced dephasing caused by the broad velocity distribution of atoms composing the vapor. In this paper, we demonstrate velocity selective optical pumping to overcome this decoherence mechanism. This will increase the achievable memory storage time of vapor memories. This technique can also be used for preparing arbitrarily shaped absorption profiles, for instance, preparing an atomic frequency comb absorption feature
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
"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.
University-student relations: dynamic framework in offline and digital environments
No full textThe purpose of this chapter is to present a university-student relationship framework for the student life cycle. A summary of research in relationship management from public relations, marketing, and related fields is provided as grounds for the new framework. Discussion of this framework is then extended in terms of its applicability for both offline and digital interactions. The later of which is becoming increasingly significant to the university-student relationship and a variety of research related to its growth and importance is presented. The chapter closes with a discussion of the implications of the framework and digital relationship building for practitioners, which highlights both some key skills practitioners will need and beneficial ways to utilize the information the framework provides
Corrigendum: The longitudinal progression of autonomic dysfunction in Parkinson\u27s disease: a 7-year study (Front. Neurol., (2023), 14, 1155669, 10.3389/fneur.2023.1155669)
Get PDFCopyright \ua9 2023 Stewart, Ledingham, Foster, Anderson, Sathyanarayana, Galley, Pavese and Pasquini.In the published article, there was an error in the author list as published. The Parkinson\u27s Progression Markers Initiative was erroneously excluded. The author list has now been updated. In addition, an Author\u27s note was missing from the published article. The updated Author\u27s note appears below: Members of Parkinson\u27s Progression Markers Initiative (PPMI) are listed in the Supplementary material. In addition, a Supplementary material file listing the members of The Parkinson\u27s Progression Markers Initiative was erroneously excluded from the publication. The Supplementary material has now been published alongside the original article. In addition there was an error in the Acknowledgments statement as published. The date of data download, the full address of the PPMI database and the RRID number was missing. The updated Acknowledgments statement appears below. Data used in the preparation of this article were obtained on September, 2nd 2022 from the Parkinson\u27s Progression Markers Initiative (PPMI) database (www.ppmi-info.org/access-data-specimens/download-data), RRID:SCR_006431. For up-to-date information on the study, visit www.ppmi-info.org. The authors apologize for these errors and state that this does not change the scientific conclusions of the article in any way. The original article has been updated
In situ characterization of an optically thick atom-filled cavity
Get PDF A means for precise experimental characterization of the dielectric susceptibility of an atomic gas inside an optical cavity is important for the design and operation of quantum light-matter interfaces, particularly in the context of quantum information processing. Here we present a numerically optimized theoretical model to predict the spectral response of an atom-filled cavity, accounting for both homogeneous and inhomogeneous broadening at high optical densities. We investigate the regime where the two broadening mechanisms are of similar magnitude, which makes the use of common approximations invalid. Our model agrees with an experimental implementation with warm caesium vapor in a ring cavity. From the cavity response, we are able to extract important experimental parameters, for instance the ground-state populations, total number density, and the magnitudes of both homogeneous and inhomogeneous broadening. </p
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