1,721,005 research outputs found
Detecting nitrite in water using a metal organic framework paper-based analytical device
No full textDetecting nitrite in water using a metal organic framework paper-based analytical device
No full textDevelopment of an in situ droplet microfluidic autonomous sensor for total alkalinity in sea water
No full text
Long-term monitoring of relict wells: the development of a real-time acoustic-chemical lander for Project Greensand
No full textThe worldwide development of marine carbon capture and storage complexes necessitates sophisticated monitoring tools capable of detecting real-time changes. In coastal seas, there are growing tensions between wind farm developments and proposed carbon capture and storage complexes which underlie them. 3D seismic reflection surveys are not thought to be possible within the boundaries of wind farms, and while 4D seismic reflection can sometimes track large scale sub-surface gas migration, they struggle to detect small scale leaks and are expensive and environmentally unfriendly. One of the most likely leakage pathways are relict wells which could be pathways for the rapid ascent of buried CO2 to the seabed. As the location of relict wells in storage sites is well known it is possible to design a Measurement, Monitoring and Verification plan which incorporates a small number of landers to continuously monitor these “higher risk zones” throughout a complex’s life. Here we describe a lander developed as part of Project Greensand Phase 2, a large-scale CCS initiative offshore Denmark, and present results from a dockside experiment. The lander comprises chemical sensors to monitor pH, nitrate, alkalinity, local currents, and the salinity; a multibeam echosounder which can detect CO2 bubble streams; battery and communication equipment
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
Dataset for research article: New capability in autonomous ocean carbon observations using the Autosub Long-Range AUV equipped with novel pH and Total Alkalinity sensors
No full textDataset supports: Hammermeister et al. New capability in autonomous ocean carbon observations using the Autosub Long-Range AUV equipped with novel pH and Total Alkalinity sensors Environmental Science & Technology 2025</span
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
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