In this work, rising of a single bubble in a quiescent liquid under microgravity condition was simulated. The related unsteady incompressible full Navier-Stokes equations were solved using a conventional finite difference method with a structured staggered grid. The interface was tracked explicitly by connected marker points via hybrid front capturing and tracking method. One field approximatio...

In this paper, we describe a planning and control approach in terms of sampling using Rapidly-exploring Random Trees (RRTs), which were introduced by LaValle. We review RRTs for motion planning and show how to use them to solve standard nonlinear control problems. We extend them to the case of hybrid systems and describe our modifications to LaValle’s Motion Strategy Library to allow for hybrid...

In this paper, we describe a planning and control approach in terms of sampling using Rapidlyexploring Random Trees (RRTs), which were introduced in [7, 9]. We review RRTs for motion planning and show how to use them to solve standard nonlinear control problems. We extend them to the case of hybrid systems and describe our modifications to LaValle’s Motion Strategy Library to allow for hybrid m...

Newer glenoid components that allow for hybrid cement fixation via traditional cementation of peripheral pegs and bony ingrowth into an interference-fit central peg introduce the possibility of long-term biological fixation. However, little biomechanical work has been done on the initial stability of these components and the various fixation options. We conducted a study in which all-polyethyle...

In this paper a segmented video codec with hybrid motion estimation and inherent bit rate control capability is presented. The first frame in the data is always encoded in intraframe mode, while the rest of the frames are encoded in interframe mode. The interframe encoding is based on (1) hybrid conventional/perspective block motion vector estimation and coding, and (2) coding of the prediction...

2D motion field is the velocity field which presents the apparent motion from one image to another in an image sequence. In this paper, with the objective of accurate estimation of 2D dense motion field, a hybrid diffusion model is proposed. The present approach differs from those in the literature in that the diffusion model and its associated objective functional are driven by both the flow f...

Visual motion detection in insects is mediated by three-input detectors that compare inputs of different spatiotemporal properties. A new modeling study shows that only a small subset of possible arrangements of the input elements provides high direction-selectivity.

Two hybrid error concealment schemes based on application of forward error control (FEC) coding in combination with passive error concealment techniques to diierent layers of coded data in a video transmission system are evaluated. It is shown that use of passive error concealment schemes alone generally does not provide suucient protection against channel errors, especially in the case of vide...

To compare the biomechanical characters of three-level anterior cervical fusion and hybrid constructs by measuring coupled motion changes of the cervical spine, Eighteen adult human cadaveric cervical spines were biomechanically investigated under eccentric displacement control in lateral bending and axial rotation by measuring vertebral motion (X, Y, Z -axis).The 3DPD condition displayed simil...

This paper proposes a new method for block motion estimation based on center-biased hybrid search (CBHS) that employ a hybrid of a compact X-shaped search and a diamond search. It has only 9 search points per block for the best case and, on average, 10.2 search points. CBHS is about 22.2 times faster than the fullsearch algorithm. This paper compares the popular suboptimal block-matching techni...