1,720,976 research outputs found
Lenain Luc, Poinsot Charles, Roger Monique et Stekelorom Catherine, Etho-écologie humaine du littoral dunkerquois, avril 1977
No full textDewailly Jean-Michel. Lenain Luc, Poinsot Charles, Roger Monique et Stekelorom Catherine, Etho-écologie humaine du littoral dunkerquois, avril 1977. In: Hommes et Terres du Nord, 1978/2. p. 107
Lenain Luc, Poinsot Charles, Roger Monique et Stekelorom Catherine, Etho-écologie humaine du littoral dunkerquois, avril 1977
No full textDewailly Jean-Michel. Lenain Luc, Poinsot Charles, Roger Monique et Stekelorom Catherine, Etho-écologie humaine du littoral dunkerquois, avril 1977. In: Hommes et Terres du Nord, 1978/2. p. 107
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
Variations on the Author
Get PDF“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
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
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Spatial and temporal structure of the fog life cycle over Atlantic Canada and the Grand Banks
Get PDFMarine fog impacts human health, naval strategy, and biological productivity. Despite itsimportance, the skill of operational and global environmental models in forecasting marine fog
and its optical properties remain limited due to our incomplete understanding of the physical
processes that drive fog, particularly over its broad range of temporal and spatial scales. The
Gulf Stream and the Labrador Sea currents meet in Atlantic Canada and the Grand Banks off
Newfoundland, Canada, making it a productive region for biodiversity with a wide range of
physical oceanographic features present. This region has one of the two highest fog occurrences
in the world (Dorman et al., 2020). In this work, we present findings from a 71-year climatological
analysis covering a broad range of spatial and temporal scales. Using ICOADS observations
from 1950-2020, ERA5 reanalysis products, and satellite imagery, we discuss fog formation and
annihilation in this region. Spatially, the Atlantic Canada continental shelf induces submesoscale
ocean features along its rapid variation in bathymetry. These structures influence the fog life
cycle. Sharp sea surface temperature gradients and air-sea temperature differences coincide with
the over-the-shelf fog maxima in summer (June, July and August). The air-sea temperature
differences show a clear signal that fog occurrence is higher with negative air-sea temperature
differences (SST - air temperature). This higher occurrence of fog is mainly isolated on the
continental shelf, where colder SST typically exists. Temporally, climatological trends confirm
correlations between air-sea temperature differences and high fog occurrence within sample
regions on and off-shelf. Satellite imagery of a fog event during the 2022 ONR FATIMA
MURI campaign highlights the complicated interplay of shelf break dynamics and near-surface
atmospheric conditions. A fog bank is shown to form in the colder water regions over the shelf,
outlining the shelf break and pointing to boundary layer and smaller-scale processes that are
driving fog formation. These observations are crucial in characterizing the spatial and temporal
structure of the fog life cycle and provide a better understanding of fog occurrence in this region
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Mid-frequency acoustic localization of breaking waves and propagation in the upper ocean
Get PDFIndividual wave breaking events were localized on the ocean surface from a vertical planar hydrophone array 130 m deep. Beamformer output from the array was projected onto the ocean surface to create an acoustic map of mid-frequency surface noise. Despite the array’s depth and small (1 m) horizontal aperture, large whitecaps in images collected from an airplane aligned well with concentrated spots of high acoustic intensity. The trajectories of breaking crests were estimated by cross-correlating conventional beamformer output of vertically and horizontally offset sub-arrays. The velocities estimated acoustically matched the aerial images. These methods could be used to collect velocity and source level information about large breaking waves. During the same field experiment, a mid-frequency source transmitted 5.5 kHz tones that propagated through the upper ocean to the hydrophone array. Drifting Thermistor Chains and a Wave Glider equipped with a conductivity-temperature-depth (CTD) winch provided estimates of the local sound speed profile (SSP) as it changed over time. The combined oceanographic and acoustic measurements showed that persistent surface and subsurface ducts were important propagation paths for the longest-range transmissions. A “shadow zone” boundary for direct path acoustic energy that did not propagate through the ducts was identified. Large fluctuations in the amplitude of this direct path were observed near the boundary, the location of which changed over time due to vertical advection of the sound speed profile
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
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