Threshold Bound States

Relationships between the coupling constant and the binding energy of threshold bound states are obtained in a simple manner from an iterative algorithm for solving the eigenvalue problem. The absence of threshold bound states in higher dimensions can be easily understood

Virtually Telling Robots What to Do

This paper describes a distributed virtual environment application that combines robotics in both virtual and real worlds. The motivation for this system comes from research in virtual and augmented reality, autonomous robotics and computer vision. The system combines graphical immersiveenvironments with the live video from a robot working in a real environment. The worlds are synchronized and updated based on both the operator selections, commands and robot actions. This system allows the user to have apowerful tool to create and control autonomous robots, thus making possible the realization of single and multiple autonomous robot applications

Tangible Teleconferencing

This paper describes a teleconferencing application that uses real objects to interact with virtual on-screen content. A variety of tangible interaction techniques can be used to load, translate, rotate and scale shared virtual models. In addition, snapshots of real documents can be easily introduced into the system and enlarged using a tangible lens. We describe the teleconferencing interface and present results from a pilot user study

THE 43Δg4^{3} \Delta_{g} STATE IN K2K_{2} - INVESTIGATING A POSSIBLE GATEWAY TO CORE NON-PENETRATING RYDBERG STATES

Author Institution: Department of Physics, United States Military Academy; Department of Physics, Temple University; Department of Chemistry, University of Illinois at Chicago; Key Lab Atom and Molecular Nanoscience, Tsinghua University; Laboratoire de Physique des Atomes, Lasers, Mol\'{e}cules et Surfaces, (PALMES), CNRS et Universit\'{e}; Laboratoire de Spectrom\'etrie Ionique et Moleculaire (L.A.S.I.M), CNRS et Universit\'e Lyon (UMR5579)Core non-penetrating Rydberg states can give useful information on the electronic structure of the ion core; however, core non-penetrating states are difficult to observe since these states hardly penetrate the more accessible ion core and the electronic angular momentum quantum number, l, is large, for the core non-penetrating states thus the transition dipole moment to the core non-penetrating states is small. The core penetrating $4^{3} \Delta_{g}$ state (atomic limit: $4s+5d$) and the core non-penetrating $3^{3}\Delta_{g}$ state (atomic limit: $4s+4f$) perturb each other since they have the same symmetry and overlapping energy states thus creating the possibility of a gateway to other core non-penetrating states

Non perturbative approach for a polar and polarizable linear molecule in an inhomogeneous electric field: Application to molecular beam deviation experiments

A non perturbative approach is used to solve the problem of a rigid linear molecule with both a permanent dipole moment and a static dipole polarizability, in a static electric field. Eigenenergies are obtained and compared to perturbative low field and high field approximations. Analytical expressions for the orientation parameters and for the gradient of the energy are given. This non perturbative approach is applied to the simulation of beam deviation experiments in strong electric field. Results of simulations are given for inhomogeneous alkali dimers. For LiNa, the simulations are compared to experimental data. For LiK, deviation profiles have been simulated in order to prepare future experiments on this molecule

Providing Full Awareness to Distributed Virtual Environments Based on Peer-To-Peer Architectures

Abstract. In recent years, large scale distributed virtual environments (DVEs) have become a major trend in distributed applications, mainly due to the enormous popularity of multiplayer online games in the entertainment industry. Since architectures based on networked servers seems to be not scalable enough to support massively multiplayer applications, peer-to-peer (P2P) architectures have been proposed as an efficient and truly scalable solution for this kind of systems. However, the main challenge of P2P architectures consists of providing each avatar with updated information about which other avatars are its neighbors. We have denoted this problem as the awareness problem. Although some proposals have been made, none of them provide total awareness to avatars under any situation. This paper presents a new awareness method based on unicast communication that is capable of providing awareness to 100 % of avatars, regardless of both their location and their movement pattern in the virtual world. Therefore, it allows large scale DVEs based on P2P architectures to properly scale with the number of users while fully providing awareness to all of them.