1,721,020 research outputs found
UK earthquake monitoring 2007/2008
Full text linkThe British Geological Survey (BGS) operates a network of seismometers
throughout the UK in order to acquire seismic data on a long-term basis.
The aims of the Seismic Monitoring and Information Service are to develop
and maintain a national database of seismic activity in the UK for use in
seismic hazard assessment, and to provide near-immediate responses to
the occurrence, or reported occurrence, of significant events. The project is
supported by a group of organisations under the chairmanship of the
Department of Communities and Local Government (DCLG) with major
financial input from the Natural Environment Research Council (NERC).
In the 19th year of the project, five new broadband seismograph stations
were established, giving a total of nineteen broadband stations. Real-time
data from all broadband stations are being transferred directly to Edinburgh
for archival and storage. Near real-time data from broadband stations
operated by a number of partner agencies in northern Europe have also
been incorporated into our automatic data processing system to improve
detection and location capability in offshore areas, particularly the North
Sea. Upgrade of the monitoring network remains our primary goal. We have
purchased a further ten broadband sensors and high dynamic range
digitisers.
Both the largest British earthquake in 25 years (Market Rasen, 5.2 MBLB) and
also the most damaging British earthquake in many decades (Folkestone,
4.3 MBLB) occurred in 2007/2008. Local authorities invoked emergency
measures for the latter. As a result of improvements in both data acquisition
and data processing made over the last few years, data of unprecedented
quality and quantity was collected for both these earthquakes. This included
both digital waveform data and also near real-time macroseismic data.
Nine papers have been published in peer-reviewed journals and seven
presentations were made at international conferences. Eight BGS internal
reports were prepared along with two confidential reports. Two PhD
studentships, partially funded by the project, were completed
UK earthquake monitoring 2006/2007 : BGS Seismic Monitoring and Information Service : 18th annual report
Full text linkThe British Geological Survey (BGS) operates a network of seismometers throughout the UK to reliably detect seismic events on a long-term basis. The aims of the Seismic Monitoring and Information Service are to develop and maintain a national database of seismic activity in the UK for use in seismic hazard assessment, and to provide near-immediate responses to the occurrence, or reported occurrence, of significant events. The project is supported by a group of organisations under the chairmanship of the Department of Communities and Local Government (DCLG) with major financial input from the Natural Environment Research Council (NERC).
In the 18th year of the project five new broadband seismograph stations were established, giving a total of fourteen broadband stations. Real-time data from all broadband stations are transferred directly to Edinburgh for archival and storage. Near real-time data from broadband stations operated by a number of partner agencies in northern Europe are also incorporated into our automatic data processing systems to improve detection and location capability in offshore areas, particularly the North Sea. Upgrade of the monitoring network remains our primary goal. We have purchased a further eighteen broadband sensors and high dynamic range digitisers
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
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Seismogenesis and state of stress in the UK
Full text linkIn this paper I present a compilation of focal mechanisms for earthquakes with magnitudes greater than 3.0 ML in the British Isles that can be used to help constrain our understanding of seismicity and it's driving forces in the British Isles. The fault plane solutions consist of both previously published mechanisms for significant British earthquakes, and new solutions calculated from regional and local data for more recent and smaller earth- quakes that were previously unpublished. Focal mechanisms for earthquakes in the UK are dominantly strike-slip with northwest-southeast compression and northeast-southwest tension,or reverse, with northwest-southeast com- pression. In many cases there is also an oblique component to the slip. P and T axes from individual solutions are relatively well constrained in azimuth, though less so in dip, with P-axes orientation for most events clustering between north and north-west, indicating sub-horizontal compression. However, some spatial variation in P- and T-axes orientation is also apparent, with near north/northeast compression and east-west extension in north- west Scotland, changing to northwest-southeast compression in England and Wales.
I estimate a best-fitting stress tensor, under the assumption of uniform stress using two different inversion methods for both the entire focal mechanism data set and two different subsets of the data. The results from the two different datasets suggest that there is a significant difference in the stress state between northwest Scotland and England and Wales. Calculated σ1 directions for England and Wales are northwest-southeast, consistent both with existing stress data and expected stresses from first order plate motions. By contrast, the inversion results for northwest Scotland show near east-west extension with possible σ1 and σ2 directions lying in a north south band, and that the magnitudes of σ1 and σ2 are similar. The relative magnitude of the principal stresses, R, determined for England and Wales suggests that the intermediate stress σ2 is close to the average value of σ1 and σ3 .
The clear difference in the stress inversion results between northwest Scotland and England and Wales suggests that the principal stress directions expected from first order plate motions have been modified in Scotland by local stress conditions due to glacio-isostatic adjustment
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