104,946 research outputs found
Water temperature mooring (M1-M20) data along the central California inner shelf
No full text<p>Water emperature Mooring Data M1-M1 (ten minute averages)</p>
<p>The data were collected as part of the Office of Naval Research Inner Shelf DRI in the Fall of 2017</p>
<p>The data are used in the manuscript entitled</p>
<p>"Statistical analysis of vertical and alongshore temperature variability in the subtidal, diurnal, and semidiurnal frequency bands along the central California inner shelf"</p>
<p>by </p>
<p>Jamie H. MacMahan, Falk Feddersen, Thomas M. Freismuth, Matt K. Gough, and Michael Kovatch</p>
<p> </p>
QUANTUM CHAOLOGY IN THE DISCRETE SELF-TRAPPING EQUATION IN THE PRESENCE OF ARNOLD DIFFUSION
No full textThe presence of Arnold diffusion enables a numerical test of a semiclassical conjecture by Berry and Robnik. Our results confirm the conjecture in almost regular and strongly chaotic regions of phase space. In the weakly chaotic regions a possible failure of the conjecture should not be overlooked
Impact of tropical SST variations on the linear predictability of the atmospheric circulation in the Atlantic/European region
No full textSeasonal mean values of tropical Sea Surface Temperature (SST) and Atlantic/European Mean Sea Level Pressure (MSLP) from a 301-year coupled ocean/atmosphere model run are analysed statistically. Relations between the two fields are identified on both interannual and interdecadal timescales. It is shown that tropical SST variability affects Atlantic/European MSLP in winter. In particular, there appears to be a statistically significant relation, between the leading modes of variability, the El Niño/Southern Oscillation (ENSO) and the North Atlantic Oscillation (NAO). During cold ENSO (La Niña) years the NAO tends to be in its positive phase, while the opposite is the case during warm ENSO (El Niño) years, although to a lesser extent. Similar analyses that are presented for gridded observational data, confirm this result, although here tropical Atlantic SST appears to be stronger related to the NAO than tropical Pacific SST. The linear predictability of a model simulated NAO index is estimated by making statistical predictions that are based on model simulated tropical SST. It is shown that the predictive skill is rather insensitive to the length of the training period. On the other hand, the skill score estimate can vary significantly as a result of interdecadal variability in the climate system. These results are important to bear in mind when making statistical seasonal forecasts that are based on observed SST.PublishedJCR Journalope
Den Tod Jhres teuersten Freundes und Lieblings, Des Hochaedlen und Wolgelarten Herrn Herrn Johann Georg Hänschens Der Rechte rümlichst Beflissenen klagten unter den Empfindungen der zärtlichen Wemut Desselben tiefgebeugte Freunde und Vererer. Joannes Aegidius Bendixen aus Schleswig, d. H. G G. Beflissener. Christian Clausen aus Flensburg, d. H. G. G. Beflissener. Peter Feddersen aus Flensburg, d. H. G. G. Beflissener
No full textGoing 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
Classical and quantum analysis of chaos in the discrete self-trapping equation
No full textWe study the discrete self-trapping model, for three degrees of freedom. The fraction of the energy shell of the phase space that is chaotic is evaluated directly from the classical motion and also from the exact energy levels of the corresponding quantum system. The correspondence between classical and quantum results is discussed
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe 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
No full textWe 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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