Present limits on the top mass from LEP1 and Tevatron point to a top quark that is considerably heavier than the W vector boson in the standard model. Hence, ee colliders with √ s ≃ 300 GeV (the c.m. energy foreseen at the first phase of the Next Linear ee Collider) could be well below the energy threshold for real top-pair production. We argue that, if this is the case, single top production t...

Assembly plays an important role in any production system as it constitutes a significant portion of the lead time and cost of a product. Virtual computer-integrated manufacturing (VCIM) system is a modern production system being conceptually developed to extend the application of traditional computer-integrated manufacturing (CIM) system to global level. Assembly scheduling in VCIM systems is ...

This study takes a chemical fiber factory’s spinning production line as the prototype to realize a threedimensional virtual simulation system. Geometric threedimensional models are constructed by exploiting the imagebased three dimension reconstruction technology, in which Harris algorithm is utilized to detect corners of the modeling objects. 3DSMAX is used to give each model a highly imitativ...

This review covers selected results from the LEP experiments on the structure of quasi-real and virtual photons. The topics discussed are the total hadronic cross-section for photon-photon scattering, hadron production, jet cross-sections, heavy quark production for photon-photon scattering, photon structure functions, and crosssections for the exchange of two virtual photons.

in recent years, virtual communities have been significantly popular and almost all of them are targeted for business profitability. in our study, the profitability of these communities for businesses has been analyzed from a commercial perspective. the study considers virtual community as a business model which can have a great impact on consumer purchase decision process. with respect to refe...

Electron-positron pair production via real and virtual photons is signi cant to the design of linear colliders, especially in the deep quantum regime (i.e., beamstrahlung parameter >> 1). In this regime, pair production via a virtual photon (the trident process) can become comparable in rate to pair production via a real beamstrahlung photon. We derive characteristics of the e+epairs produced v...

In this paper, we demonstrate an immersive and interactive broadcasting production system with a new haptically enhanced multimedia broadcasting chain. The system adapts Augmented Reality (AR) techniques, which merges captured videos and virtual 3D media seamlessly through multimedia streaming technology, and haptic interaction technology in near real-time. In this system, viewers at the haptic...