With the increasing applications based on location, the researches on spatiotemporal data, especially queries of spatiotemporal data have attracted a lot of attention. XML, as a standard language of information exchanging over the Web, should have the ability to query spatiotemporal data. In this paper, we propose an algorithm, TwigSPFast, for matching a spatiotemporal XML query twig pattern. W...

In this paper, we present a spatiotemporal information integrated RDF data management system, called g-Store. In g-Store, some entities have spatiotemporal features, and some statements have valid time intervals and occurring locations. We introduce some spatiotemporal assertions into the SPARQL query language to answer the spatiotemporal range queries and join queries. Some examples are listed...

Modeling moving objects has become a topic of increasing interest in the area of video databases. Two key aspects of such modeling are spatial and temporal relationships. In this paper we introduce an innovative way to represent the trajectory of a single moving object and the relative spatio-temporal relations between multiple moving objects. The representation supports a rich set of spatial t...

A quantitative model of auditory learning is presented to predict how auditory patterns are stored in the songbird auditory forebrain. This research focuses on the caudomedial nidopallium (NCM) in the songbird telencephalon, a candidate site for song perception and the formation of song auditory memories. The objective is to introduce simplified features of bird song that could be used by the a...

Automatically understanding human actions from video sequences is a very challenging problem. This involves the extraction of relevant visual information from a video sequence, representation of that information in a suitable form, and interpretation of visual information for the purpose of recognition and learning. In this paper, we first present a view-invariant representation of action consi...

Question: Previous interpretations of the variance plot of paired quadrat variance method (PQV) have been incomplete. The objective of this study was to clarify the interpretation of PQV, and to shed additional light on how different quadrat variance methods can be used, in concert, to measure scale in transect data. Methods: We used artificial and real data to examine how the PQV method elucid...

Dynamic scenes with many different objects and interrelations changing over time demand complex representations. The identification of frequent patterns and prediction rules in such scenes would be very valuable as associations in the data could be discovered or a system’s performance could even be improved by utilizing the new information in the behavior decision process. In this work, a novel...

* Department of Biology, Duke University, Phytotron Building, Science Drive, Box 90340, Durham, NC 27708-0340, USA, ‡ Área de Biodiversidad y Conservación, ESCET, Universidad Rey Juan Carlos, 28933 Móstoles, § Departamento de Agroquímica y Medio Ambiente, Universidad Miguel Hernández, 03202 Elche, and ¶ Departamento de Silvopascicultura, ETSI Montes, Universidad Politécnica de Madrid, 28040 Mad...

Spatiotemporal helixes constitute a novel method we developed for modeling changes in an object over time. Changes in both an object’s trajectory and its outline can be represented with these helixes. In addition, spatiotemporal helixes can be compared to determine whether multiple objects have undergone similar changes. In this paper, we present a method by which these helixes may be compared,...

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