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Interpolating and Using Most Likely Trajectories in Moving-Objects Databases

by Byunggu Yu, Seon Ho Kim
"... Abstract. In recent years, many emerging database applications deal with large sets of continuously moving data objects. Since no computer system can commit continuously occurring infinitesimal changes to the database, related data management techniques view a moving object’s trajectory as a sequenc ..."
Abstract - Cited by 3 (0 self) - Add to MetaCart
sequence of discretely reported spatiotemporal points. For each pair of consecutive committed trajectory points, a spatiotemporal uncertainty region representing all possible in-between trajectory points is defined. To support trajectory queries with a non-uniform probability distribution model, the query

Clustering Point Trajectories with Various Life-Spans

by Matthieu Fradet, Patrick Pérez
"... Abstract—Motion-based segmentation of a sequence of images is an essential step for many applications of video analysis, including action recognition and surveillance. This paper introduces a new approach to motion segmentation operating on point trajectories. Each of these trajectories has its own ..."
Abstract - Cited by 18 (2 self) - Add to MetaCart
Abstract—Motion-based segmentation of a sequence of images is an essential step for many applications of video analysis, including action recognition and surveillance. This paper introduces a new approach to motion segmentation operating on point trajectories. Each of these trajectories has its own

Continuity and discontinuity of behavioral inhibition and exuberance: Psychophysiological and behavioral influences across the first four years of life.

by Nathan A Fox , Heather A Henderson , Kenneth H Rubin , Susan D Calkins , Louis A Schmidt Fox , N Henderson , H Rubin , K Calkins , S D & Schmidt , L - Child Development, , 2001
"... Abstract: Four-month-old infants were screened (N = 433) for temperamental patterns thought to predict behavioral inhibition, including motor reactivity and the expression of negative affect. Those selected (N = 153) were assessed at multiple age points across the first 4 years of life for behavior ..."
Abstract - Cited by 124 (47 self) - Add to MetaCart
Abstract: Four-month-old infants were screened (N = 433) for temperamental patterns thought to predict behavioral inhibition, including motor reactivity and the expression of negative affect. Those selected (N = 153) were assessed at multiple age points across the first 4 years of life

EFFICIENT CIS-LUNAR TRAJECTORIES

by E. Post, Edward Belbruno
"... Twenty years ago, the theoretical notions of low-energy transfers were put to test with the Japanese spacecraft, Hiten. With the successful implementation of the low-energy transfer trajectory discovered by Belbruno, Hiten exposed the available option space for mission designers seeking efficient tr ..."
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Twenty years ago, the theoretical notions of low-energy transfers were put to test with the Japanese spacecraft, Hiten. With the successful implementation of the low-energy transfer trajectory discovered by Belbruno, Hiten exposed the available option space for mission designers seeking efficient

Constructing popular routes from uncertain trajectories.

by Ling-Yin Wei , Yu Zheng , Wen-Chih Peng - In KDD’12, , 2012
"... ABSTRACT The advances in location-acquisition technologies have led to a myriad of spatial trajectories. These trajectories are usually generated at a low or an irregular frequency due to applications' characteristics or energy saving, leaving the routes between two consecutive points of a sin ..."
Abstract - Cited by 22 (3 self) - Add to MetaCart
ABSTRACT The advances in location-acquisition technologies have led to a myriad of spatial trajectories. These trajectories are usually generated at a low or an irregular frequency due to applications' characteristics or energy saving, leaving the routes between two consecutive points of a

Trajectory Fusion for Multiple Camera Tracking

by Ariel Amato, Murad Al Haj, Mikhail Mozerov
"... Summary. In this paper we present a robust and efficient method to overcome the negative effects of occlusion in the tracking process of multiple agents. The proposed approach is based on the matching of multiple trajectories from multiple views using spatial and temporal information. These trajecto ..."
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. These trajectories are represented as consecutive points of a joint ground plane in the world coordinate system that belong to the same tracked agent. We introduce an integral distance between compared trajectories, which allows us to avoid mismatches, due to the possible measurement outliers in one frame

Adult Work Commitment, Financial Stability, and Social Environment as Related to Trajectories of Marijuana Use Beginning in Adolescence

by EdD Judith S Brook , PhD Jung Yeon Lee , PhD Stephen J Finch , Nathan Seltzer , David W Ba , MD Brook
"... ABSTRACT. Background: The objective of this study is to examine trajectories of marijuana use among African Americans and Puerto Ricans from adolescence to adulthood, with attention paid to work commitment, financial stability, drug use, and violence. Methods: Participants (N = 816) completed in-cl ..."
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ABSTRACT. Background: The objective of this study is to examine trajectories of marijuana use among African Americans and Puerto Ricans from adolescence to adulthood, with attention paid to work commitment, financial stability, drug use, and violence. Methods: Participants (N = 816) completed in

The multi-agent rendezvous problem.

by J Lin , A S Morse , B D O Anderson - In Proceedings of the IEEE Conference on Decision and Control, , 2003
"... Abstract-This paper is concerned with the collective behavior of a group of n > 1 mobile autonomous agents, labelled 1 through n, which can all move in the plane. Each agent is able to continuously track the positions of all other agents currently within its "sensing region" where by a ..."
Abstract - Cited by 103 (5 self) - Add to MetaCart
;stop-and-go" maneuvers. A stop-and-go maneuver takes place within a time interval consisting of two consecutive sub-intervals. The first, called a sensing period, is an interval of fixed length during which the This research was supported by the National Science Foundation and by the Australia Government Department

Reducing Uncertainty of Low-Sampling-Rate Trajectories

by Kai Zheng, Yu Zheng, Xing Xie, Xiaofang Zhou - In ICDE , 2011
"... Abstract—The increasing availability of GPS-embedded mobile devices has given rise to a new spectrum of location-based services, which have accumulated a huge collection of location trajectories. In practice, a large portion of these trajectories are of low-sampling-rate. For instance, the time inte ..."
Abstract - Cited by 14 (6 self) - Add to MetaCart
interval between consecutive GPS points of some trajectories can be several minutes or even hours. With such a low sampling rate, most details of their movement are lost, which makes them difficult to process effectively. In this work, we investigate how to reduce the uncertainty in such kind

Tracking Feature Points: a New Algorithm

by Dmitry Chetverikov, Judit Verestóy - Proc. Int. Conf. on Pattern Recognition , 1998
"... A new algorithm is presented for feature point based motion tracking in long image sequences. Dynamic scenes with multiple, independently moving objects are considered in which feature points may temporarily disappear, enter and leave the view field. The existing approaches to feature point tracking ..."
Abstract - Cited by 32 (3 self) - Add to MetaCart
tracking [6, 3, 5, 4] have limited capabilities in handling incomplete trajectories, especially when the number of points and their speeds are large, and trajectory ambiguities are frequent. The proposed algorithm was designed to efficiently resolve these ambiguities. 1 1. Introduction Feature point
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