We apply the 3D-orientation tensor representation to construct an object tracking algorithm. 2D-line normal ow is estimated by computing the eigenvector associated with the largest eigenvalue of 3D (two spatial dimensions plus time) tensors with a planar structure. Object's true 2D velocity is computed by averaging tensors with consistent normal ows, generating a 3D line represention that corre...

Moment tensors derived from seismic measurements during earthquakes are related to stress tensors and keep important information about surface displacement in the earth’s mantle. We present methods facilitating an interactive visualization of scattered moment data to support earthquake and displacement analysis. For this goal, we combine and link visualizations of spatial location and orientati...

We present a sub-symbolic wall representation system, based on low-level distance sensors, that permits to endow a robot vehicle with a wall-following behavior which exhibits the most basic cognitive capabilities: detecting walls, estimating the orientation of a wall through averaging of sensory data, robustness against noisy sensory information and wall selection. To generate these abstract fo...

Several wearable computing or ubiquitous computing research projects have detected and distinguished user motion activities by attaching accelerometers in known positions and orientations on the user’s body. This paper observes that the orientation constraint can probably be relaxed. An estimate of the constant gravity vector can be obtained by averaging accelerometer samples. This gravity vect...

This paper presents a new method for warping of diffusion tensor fields. The proper reorientation of a tensor field requires knowledge of the underlying fiber orientation, which is not known a priori. Accordingly, a probabilistic representation of the fiber direction is adopted and used in a Procrustean estimation of the rotational component of the warping field. The estimated rotational compon...

In the Fraser phase-illusion [Popple & Sagi. Vision Research, 40 (2000) 873-878] rows of Gabor patches appear tilted because successive elements are shifted in phase. We measured this bias in global orientation judgment, while varying the number of patches in each row, and their separation. We found that illusory tilt increases with the number of patches, at least up to ten patches for a separa...

This study discusses some variants of Ordered WeightedAveraging (OWA) operators and related information aggregation methods. Indetail, we define the Extended Ordered Weighted Sum (EOWS) operator and theExtended Ordered Weighted Averaging (EOWA) operator, which are applied inscientometrics evaluation where the preference is over finitely manyrepresentative works. As...

The road safety performance of countries is conducted by combining seven main risk indicators into one index using a particular weighting and aggregation method. Weights can be determined with respect to the assumed importance of the indicator, whereas aggregation operators can be used to stress better performances differently from worse performances irrespective of the indicator’s meaning. In ...

The conventional method of aggregating the satisfaction of transport projects with respect to multiple attributes is commonly some variant of Simple Additive Weighting (SAW), which involves the sum of products of standardized outcomes of projects with respect to attributes and attribute importance weights. It is suggested that alternative forms of aggregation might be more useful, in particular...

We consider the acoustic flow field of rotationally symmetric systems, like an annular combustor and in a round duct, absence mean azimuthal field. focus on instabilities, which manifest as either spinning (rotating) waves or standing waves, linear combination two. These instabilities are often excited by some level background noise that makes system randomly change between states, undergo ampl...