1,789 research outputs found
Tracking and Retexturing Cloth for RealTime Virtual Clothing Applications
Abstract. In this paper, we describe a dynamic texture overlay method from monocular images for real-time visualization of garments in a virtual mirror environment. Similar to looking into a mirror when trying on clothes, we create the same impression but for virtually textured garments. The mirror is replaced by a large display that shows the mirrored image of a camera capturing e.g. the upper body part of a person. By estimating the elastic deformations of the cloth from a single camera in the 2D image plane and recovering the illumination of the textured surface of a shirt in real time, an arbitrary virtual texture can be realistically augmented onto the moving garment such that the person seems to wear the virtual clothing. The result is a combination of the real video and the new augmented model yielding a realistic impression of the virtual piece of cloth
Spin polarization of Auger- and of photoelectrons from barium atoms exposed to circularly polarized radiation and their cross comparison
Kuntze R, Salzmann M, Böwering N, Heinzmann U. Spin polarization of Auger- and of photoelectrons from barium atoms exposed to circularly polarized radiation and their cross comparison. Zeitschrift für Physik D: Atoms, Molecules and Clusters. 1994;30(2-3):235-237.New results of spin polarization of both photoelectrons and Auger electrons are reported after 5[Rho] photoionization of free Ba atoms with circularly polarized light. A substantial polarization transfer from the spin polarized photons to the spin polarized photoelectrons and via the hole state orientation to the spin polarized Auger-electrons is observed. The cross comparison of the results for photoelectrons and Auger-electrons allows a quantitative test of the assumed two step model where both electron-emission processes occur in sequence
Pediatric Dentists’ Silver Diamine Fluoride Education, Knowledge, Attitudes, and Professional Behavior: A National Survey
Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/153647/1/jddjde019020.pd
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Quantum Zeno Effect in Open Quantum Systems
We prove the quantum Zeno effect in open quantum systems whose evolution,
governed by quantum dynamical semigroups, is repeatedly and frequently
interrupted by the action of a quantum operation. For the case of a quantum
dynamical semigroup with a bounded generator, our analysis leads to a
refinement of existing results and extends them to a larger class of quantum
operations. We also prove the existence of a novel strong quantum Zeno limit
for quantum operations for which a certain spectral gap assumption, which all
previous results relied on, is lifted. The quantum operations are instead
required to satisfy a weaker property of strong power-convergence. In addition,
we establish, for the first time, the existence of a quantum Zeno limit for the
case of unbounded generators. We also provide a variety of physically
interesting examples of quantum operations to which our results apply
Microfield distributions in strongly coupled two-component plasmas
The electric microfield distribution at charged particles is studied for
two-component electron-ion plasmas using molecular dynamics simulation and
theoretical models. The particles are treated within classical statistical
mechanics using an electron-ion Coulomb potential regularized at distances less
than the de Broglie length to take into account the quantum-diffraction
effects. The potential-of-mean-force (PMF) approximation is deduced from a
canonical ensemble formulation. The resulting probability density of the
electric microfield satisfies exactly the second-moment sum rule without the
use of adjustable parameters. The correlation functions between the charged
radiator and the plasma ions and electrons are calculated using molecular
dynamics simulations and the hypernetted-chain approximation for a
two-component plasma. It is shown that the agreement between the theoretical
models for the microfield distributions and the simulations is quite good in
general.Comment: 18 figures. Submitted to Phys. Rev.
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