130,872 research outputs found
Two UNIDENTIFIED Men Standing in Lateral Constructed in the Spring of 1946 and Seeded to Kobe Lespedeza on the D. N. and W. L. Koll Farm
No full textPhotograph of two UNIDENTIFIED men standing in lateral constructed in the spring of 1946 and seeded to Kobe Lespedeza on the D. N. and W. L. Koll farm. The back of the photograph proclaims, "Lateral constructed in spring of 1946. Seeded to Kobe Lespedeza. Maintained by mowing 3 to 5 times per year.
A B\'{e}koll\`{e}-Bonami Class of Weights for Certain Pseudoconvex Domains
No full textWe prove the weighted regularity of the ordinary Bergman projection on
certain pseudoconvex domains where the weight belongs to an appropriate
generalization of the B\'{e}koll\`{e}-Bonami class. The main tools used are
estimates on the Bergman kernel obtained by McNeal and B\'{e}koll\`{e}'s
original approach of proving a good-lambda inequality.Comment: 24 page
Interaction of Alkaline Metal Cations with Oxidic Surfaces: Effect on the Morphology of SnO2 Nanoparticles
No full textReaction pathways to SnO2 nanomaterials through the hydrolysis of hydrated tin tetrachloride precursors were investigated. The products were prepared solvothermally starting from hydrated tin tetrachloride and various (e.g., alkali) hydroxides. The influence of the precursor base on the final morphology of the nanomaterials was studied. X-ray powder diffraction (XRD) data indicated the formation of rutile-type SnO2. Transmission electron microscopy (TEM) studies revealed different morphologies that were formed with different precursor base cations. Data from molecular dynamics (MD) simulations provide theoretical evidence that the adsorption of the cations of the precursor base to the faces of the growing SnO2 nanocrystals is crucial for the morphology of the nanostructures. RI Birkel, Alexander/D-6123-2011; Tremel, Wolfgang/D-8125-2011; Mugnaioli, Enrico/E-6237-2011; Loges, Niklas/F-2479-201
Alternate View of Two UNIDENTIFIED Men Standing in Lateral Constructed in the Spring of 1946 and Seeded to Kobe Lespedeza on the D. N. and W. L. Koll Farm
No full textPhotograph of two UNIDENTIFIED men standing in lateral constructed in the spring of 1946 and seeded to Kobe Lespedeza on the D. N. and W. L. Koll farm. The back of the photograph proclaims, "Lateral constructed in spring of 1946. Seeded to Kobe Lespedeza. Maintained by mowing 3 to 5 times per year.
Gemstone: Empowering Decentralized Social Networking with High Data Availability
No full textSocial networking platforms such as Facebook, MySpace, and Twitter have seen a significant increase in user population and user provided information. However, users are increasingly concerned about identity and data privacy since information is controlled by single companies. To address this issue researchers investigated alternative solutions, where the users' data, e.g. profile information, comments and messages, is stored at user-controlled nodes. Although these solutions provide a plausible means for avoiding privacy leaking in central instances, they raise a new challenge to design a cost-effective storage replica scheme which ensures a high data availability even when some users are offline. In this paper we present Gemstone, a social network platform where the data replication scheme leverages a learning mechanism based on social relationships, online patterns of peers and user experiences. Our preliminary evaluation shows that compared to related works, it achieves higher data availability while requiring a smaller number of data replicas
MeSH term explosion and author rank improve expert recommendations
No full textInformation 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
Structure analysis of titanate nanorods by automated electron diffraction tomography
No full textA hitherto unknown phase of sodium titanate, NaTi3O6(OH)center dot 2H(2)O, was identified as the intermediate species in the synthesis of TiO2 nanorods. This new phase, prepared as nanorods, was investigated by electron diffraction, X-ray powder diffraction, thermogravimetric analysis and high-resolution transmission electron microscopy. The structure was determined ab initio using electron diffraction data collected by the recently developed automated diffraction tomography technique. NaTi3O6(OH)center dot 2H(2)O crystallizes in the monoclinic space group C2/m. Corrugated layers of corner- and edge-sharing distorted TiO6 octahedra are intercalated with Na+ and water of crystallization. The nanorods are typically affected by pervasive defects, such as mutual layer shifts, that produce diffraction streaks along c*. In addition, edge dislocations were observed in HRTEM images. RI Tremel, Wolfgang/D-8125-2011; Andrusenko, Iryna/E-6239-2011; Mugnaioli, Enrico/E-6237-2011; Kolb, Ute/A-2642-201
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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"
No full textBoth 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.
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