1,721,197 research outputs found
Thematic Video Indexing to support video database retrieval and query processing
No full textThis paper presents a novel video database system, which caters for complex and long videos, such as documentaries, educational videos, etc. As compared to relatively structured format videos like CNN news or commercial advertisements, this database system has the capacity to work with long and unstructured videos. A video's metadata is stored in a database. This metadata is used for indexing and querying the video. In this model, metadata contains information about segments (combinations of frames) and scenes (collections of segments that represent the same content). The metadata is organised in such a way that it can be used to navigate a theme (concept or idea). Annotations describing scenes are linked in hierarchical manner to create a story line in the video, where thematic indexing is used to develop a video catalogue. Thematic indexing is a novel way to track a story in a video. A video contains many themes, which are implicitly related to each other. In order to resolve queries about particular scenes in a video, the scenes are stored in hierarchically, which provide "is-a" or "have-part" relations between them. We have tested our model on one of the hour-long documentaries made for television by the Earl Mountbatten of Burma. The results show that a user can easily query for natural scenes or events such as Japanese Soldiers landing in Burma in World War 2, Allied forces defending the border, air bombings, soldiers marching in fields etc. The database system has been designed to ensure MPEG-4 compatibility. The metadata and other information is kept in such a format that it could be easily converted as captions to Audio Video Objects (AVOs) at the access unit layer in the MPEG-4 System Layer Model
tvDBMS - A video database management system incorporating a thematic indexing model
No full textThis demonstration presents a novel video database system, tvDBMS, which caters for complex and long videos, such as documentaries, educational videos, etc. As compared to relatively structured format videos like CNN news or commercial advertisements, this database system has the capacity to work with long and unstructured videos. tvDBMS metadata contains information about segments (combinations of frames) and scenes (collections of segments that represent the same content). This metadata is organized in such a way that it can be used to navigate a theme (concept or idea). Annotations describing scenes are linked in hierarchical manner to create a story line in the video, where thematic indexing is used to develop a video catalogue. Thematic indexing is a novel way to track a story in a video. A video contains many themes, which are implicitly related to each other. In order to resolve queries about particular scenes in a video, the scenes are stored hierarchically, which provides 'is-a' or 'have-part' relations between them. We have tested our model on one of the hour-long documentaries made for television by the Earl Mountbatten of Burma. The results show that a user can easily query for natural scenes or events such as Japanese Soldiers landing in Burma in World War 2, Allied forces defending the border, air bombings, soldiers marching in fields etc. tvDBMS is divided into three basic components. The Composer, which provides a user with tools to generate metadata for videos, create thematic indices and database connectivity of metadata and video data, as shown in figure (1). The Query Processor deals with all the queries to be performed and how to track a particular story line for an event or an object, whereas the Query Output Window provides twelve best searched portions of videos of a query
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
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
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
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