org, under "UFOs and ETs"), a rectangular, rigid object
of negligible depth passed almost directly over my head at a constant speed of about 15 mph, with no visible means of propulsion or support.
In the present work, a sliding mode controller is modeled and designed to simultaneously control the position-force of 3- DOF dual cooperative arm that manipulates a rigid object
One of these designs is embedded optical fibers within a rigid object
In an experiment on a mixture of water, surfactant (soap) and an organic salt, two researchers from the Pritchard Fluid Mechanics Laboratory at Penn State show that a rigid object
like a knife passes through the mixture at slow speeds as if it were a liquid, but rips it up as if it were a rubbery solid when the knife moves rapidly.
They cover physics and measurement, motion and its laws, vectors, circular motion and other notions from Newton, the energy of a system conservation of energy, linear momentum and collisions, rotation of a rigid object
about a fixed axis, angular momentum, static equilibrium and elasticity, universal gravitation, fluid mechanics, oscillatory motion, wave motion, sound waves, superposition and standing waves, temperature, the first and second laws of thermodynamics, the kinetic theory of gases, heat engines, and entropy.
Second, the string does not overlap any solid rigid object
Bottle class, rigid object
, and giraffle class, non-rigid object
, are chosen for evaluation.
While existing frame-by-frame techniques can produce relatively realistic movement of rigid objects
, they remain unable to recreate the elegant and fluid movements of a non-rigid object
, such as a Sumo wrestler falling to the floor, a sea lion playing on a beach, or a bowl of Jello salad being set on a picnic table.
Many years of work in the field have led to several reliable approaches for reconstruction of rigid , multiple rigid  and articulated rigid objects
(such as a hammer, pliers, screwdriver, or a belt buckle) are more likely than flexible objects (such as a whip or shoe) to leave a readily apparent imprint.
They are more appropriate for representing simple rigid objects
2011, Tracking rigid objects
using integration of model-based and model-free cues.