The base-line frequency of micronucleated cells was measured in g111 tissue of Mytilus ga l loprov~nc~ahs Lmk. from 2 ~Mediterranean areas (northern Tyrrhenian and northern Adriatic Seas), and turned out to be a function of water temperature and age of the animals.

We present a novel technique to identify calendar-based (annual, monthly and daily) periodicities of an interval-based temporal pattern. An interval-based temporal pattern is a pattern that occurs across a time-interval, then disappears for some time, again recurs across another time-interval and so on and so forth. Given the sequence of time-intervals in which an interval-based temporal patter...

Explosive growth in geospatial and temporal data as well as the emergence of new technologies emphasize the need for automated discovery of spatiotemporal knowledge. Spatiotemporal data mining studies the process of discovering interesting and previously unknown, but potentially useful patterns from large spatiotemporal databases. It has broad application domains including ecology and environme...

In order to eliminate data redundancy of spatiotemporal database, and flexibly create spatiotemporal association patterns, and fast discover spatiotemporal association rules, firstly, this paper adopts event-coverage to create spatiotemporal mining database; the method can divide the spatiotemporal domain into some spatiotemporal transaction cells, where each cell is made of attribute values an...

Concentration is one of the most important factor in determining the efficiency of learning. There has not been, however, much systematic research on controlling the level of concentration. We therefore examined the effect of an external factor, namely playing music, on the performance on a task that requires much attention. We compared three conditions: music that the subject likes, music that...

Despite being commonly credited with initiating the field of cavitation in elastomers, famed poker-chip experiments Gent and Lindley (1959) have yet to be fully explained. One likely reason for their elusiveness is that it had long been presumed elastomers was a phenomenon could explained solely on basis elasticity elastomer at hand. Of late, full-field analyses carried out high spatiotemporal ...

Previously we studied the effect of spatiotemporal pattern of transients on perceptual organization. Transient synchrony/asynchrony was critical in novel illusions of contextual motion (Likova & Tyler, 2001, 2002a,b, 2003a,b, 2004). We found that strong image segmentation can be generated from transient asynchronies in fields of homogeneous visual noise, a phenomenon that we term ‘Structure-fro...

PURPOSE The frequency-doubling (FD) phenomenon describes the increase in apparent spatial frequency occurring when low-spatial-frequency sine wave gratings undergo rapid counterphase flicker. It is unclear whether the visual mechanisms isolated when pattern appearance is used as a threshold criterion are the same as when a simple detection criterion (as in FD perimetry) is used. It is also uncl...

Among other operations, a spatiotemporal DBMS should efficiently answer the spatiotemporal join. This paper presents an evaluation of spatiotemporal join algorithms using these new structures, particularly a partially persistent R-Tree called Temporal R-Tree and the 2+3D R-Tree. Starting from spatial join algorithms, we present algorithms for processing spatiotemporal joins over time instants a...

sand and dust storms are natural events that occur widely around the world, mostly in dry and bare lands. over thepast decade a large part of iran has been affected by this phenomenon, and tehran has not been excluded from thisevent. therefore, having knowledge of spatiotemporal frequency variations can aid us in future management andstorm trajectory assessment. in this study the synoptic anemo...