Using light to measure an object’s motion is central operating mechanical sensors that probe forces and fields. Cavity optomechanical systems embed resonators inside optical resonators. This enhances the sensitivity of measurements, but only if resonator does not spoil properties cavity. For example, cavity detection made from optically absorbing materials, or whose geometry possess suitable sp...

This paper is concerned with a lattice dynamical system modeling the evolution of susceptible and infective individuals at discrete niches. We prove the existence of traveling waves connecting the disease-free state to non-trivial leftover concentrations. We also characterize the minimal speed of traveling waves and we prove the non-existence of waves with smaller speeds.

This paper proposes a real-time traffic surveillance system for the detection, recognition, and tracking of multiple vehicles in roadway images. Moving vehicles can be automatically separated from the image sequences by a moving object segmentation method. Since CCD surveillance cameras are typically mounted at some distance from roadways, occlusion is a common and vexing problem for traffic su...

An optimal maximum-likelihood technique for computing point-source image centroids from many, slightly o set, CCD frames is presented. The method is especially useful for measuring stellar proper motions from data taken with the Wide Field and Planetary Camera aboard the HST, and also provides a means to identify very compact non-stellar sources. We work though the example problem of obtaining ...

Many physical systems exhibit rapid motion coupled to a slowly varying motion. Often the rapid motion is associated with a stii contribution in the potential energy function. In this context, the situation typically considered in the literature is the one with a strictly convex potential. Under some technical assumptions, one can then show that the slow motion is reproduced by a properly constr...

Soft-sphere discrete element method (DEM) and Navier-Stokes equations were coupled with equations of energy for gas and solids to investigate the process of agglomeration in fluidized bed of polyethylene particles at high temperature. The Newton’s second law of motion was adapted for translational and rotational motion of particles and agglomerates. The cohesive force for polyethylene particles...

The authors examined how timing accuracy in tapping sequences is influenced by sequential effects of preceding finger movements and biomechanical interdependencies among fingers. Skilled pianists tapped sequences at 3 rates; in each sequence, a finger whose motion was more or less independent of other fingers’ motion was preceded by a finger to which it was more or less coupled. Less independen...

[Purpose] The purpose of this study was to investigate thoracic coupled motions of 20 Korean young individuals. [Methods] Thoracic motion of twenty healthy male college students aged 23.2±3.1 was examined. The coupled motions of the thoracic regions T1-4, T4-8, T8-12 were measured using a three dimensional motion capture system. [Results] Coupled axial rotation in the same direction as lateral ...

Analysis of an aeroelastic bridge system consisting of the fundamental vertical and torsional modes of vibration offers an expeditious assessment of bridge flutter performance. It also produces valuable insight into the multimode coupled bridge response to strong winds. This paper presents closed-form formulations for estimating the modal frequencies, damping ratios, and coupled motions of the ...

Proteins are flexible molecules that undergo structural changes to function. The Protein Data Bank contains multiple entries for identical proteins determined under different conditions, e.g. with and without a ligand molecule, which provides important information for understanding the structural changes related to protein functions. We gathered 839 protein structural pairs of ligand-free and l...