In ubiquitous environments, many applications need to process data with time and space dimensions. Because of this, there is growing attention not only on gathering spatiotemporal data in ubiquitous environments, but also on processing such data in databases. In order to obtain the full benefits from spatiotemporal data, we need a data model that naturally expresses the properties of spatiotemp...

Propagation-invariant or nondiffracting optical beams have received considerable attention during the last two decades. However, pulsed nature of light waves and structured property media like waveguides are often overlooked. We here present a four-dimensional spatiotemporal approach that extends unifies both concepts conical helicon beams, mainly studied in bulk media. By taking advantage tigh...

This article compares the current states of science and practice regarding spatiotemporal (space+time) crime analysis within intermediateto large-size law enforcement agencies in the Northeastern United States. The contributions of the presented research are two-fold. First, a comprehensive literature review was completed spanning the domains of Criminology/Crime Analysis and GIScience/Cartogra...

Spatiotemporal turbulence or defect-mediated turbulence exists quite generally in excitable and oscillatory media such as chemical turbulence in reaction-diffusion systems and electrical turbulence in cardiac muscle. In many situations spatiotemporal turbulence is very undesirable. For example, ventricular fibrillation, the major reason behind sudden cardiac death, is a turbulent cardiac electr...

A spatiotemporal network is a spatial network (e.g., road network) along with the corresponding time-dependent travel-time for each segment of the network. Design and analysis of policies and plans on spatiotemporal networks (e.g., for path planning with locationbased services) require realistic models that accurately represent the temporal behavior of such networks. In this paper, for the firs...

It's a well-known fact that the new GIS applications need to keep track of temporal information. Among other operations, a spatiotemporal DBMS should efficiently answer the spatiotemporal join. The best-known spatial index structure, the R-Tree (and its variants), does not preserve the MBRs’ evolution. New indexing structures were proposed in the literature that allows the retrieving of present...

Repetitive spatiotemporal patterns in spontaneous brain activities have been widely examined in non-human studies. These studies have reported that such patterns reflect past experiences embedded in neural circuits. In human magnetoencephalography (MEG) and electroencephalography (EEG) studies, however, spatiotemporal patterns in resting-state brain activities have not been extensively examined...