1,721,274 research outputs found
John T. Yates Jr.
No full textJOHN T. YATES, JR.
NBS: 1963 - 1982
Birth: August 3, 1935, Winchester, Virginia
EDUCATION:
Juniata College, BS (Chemistry) 1956
Massachusetts Institute of Technology, PhD (Chemistry) 1960
PRINCIPAL FIELDS:
Chemisorption and physical adsorption; electronic excitation of surface processes; vibrational and electronic spectroscopic studies of surfaces; scanning tunneling microscopy; experimental methods development in surface science
POSITIONS HELD AT NBS:
NRC-NBS Postdoctoral
Research Chemist
Chief, Surface Chemistry Section
HONORS:
U.S. Department of Commerce: Silver Medal, 1973; Gold Medal, 1981
NBS Stratton Award (joint with T.E. Madey), 1978
MEMBERSHIPS:
American Chemical Society
American Physical Society (Fellow)
American Vacuum society (Fellow)
PUBLICATIONS:
Over 600 papers on surface science and physical chemistr
Distribuzioni lineari elastiche delle tensioni per intagli parabolici o iperbolici in alberi soggetti a torsione
No full textElastic stress distributions for hyperbolic and parabolic notches in round shafts under torsion and uniform antiplane shear loadings
No full textClosed-form Solutions are developed for the stress fields induced by circumferential hyperbolic and parabolic notches in axisymmetric shafts under torsion and uniform antiplane shear loading. The boundary Value problem is formulated by using complex potential functions and two different coordinate systems, providing two classes Of solutions. It is also demonstrated that some Solutions of linear elastic fracture and notch mechanics reported ill the literature can be derived as special cases of the general solutions proposed herein. Finally the analytical frame is Used to link the Mode III notch stress intensity factor to the maximum shear stress at the notch tip, as well as to give closed-form expressions for the strain energy averaged over a finite size volume surrounding the notch root
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
SUMO-binding motifs mediate the Rad60-dependent response to replicative stress and self-association
No full textIn fission yeast, the replication checkpoint is enforced by the kinase Cds1 ( human Chk2), which regulates both cell cycle progression and DNA repair factors to ensure that the genome is faithfully duplicated prior to mitosis. Cds1 contains a forkhead-associated domain that mediates its interaction with phosphorylated residues in target proteins. One target of Cds1 is the essential nuclear protein Rad60, which contains the unique structural feature of tandem SUMO homology domains at its C terminus. Hypomorphic mutants of Rad60 cause profound defects in DNA repair and replication stress tolerance. To explore the physiological significance of the Cds1-Rad60 interaction, we have examined the phosphorylation of Rad60 by Cds1 in vitro and the in vivo phosphorylation of Rad60 in response to replication blocks. We find that the N terminus but not the SUMO-like domain of Rad60 is phosphorylated in both conditions. Three important Rad60 phosphorylation sites were identified: Thr(72), Ser(32), and Ser(34). Rad(60) Thr(72) mediates the Cds1-Rad60 interaction and is required for the Cds1-dependent phosphorylation of Rad60 in response to replication arrest. Phosphorylation of Rad60 Ser32 and Ser34 in a putative SUMO-binding motif is critical for the survival of replication stress. In addition, mutation of Rad60 Ser32 and Ser34 to alanine is lethal in cells deleted for the RecQ DNA helicase Rqh1. Finally, we find that Rad60 self-associates via its C-terminal SUMO-like domain and putative SUMO-binding motifs
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
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