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...

the virtual space of internet social networks is one of the most important devices to exert the influence of globalization. this virtual space creates a vast quantity of information and meaning representations. faced with this space and the profusion of sources, people experience suspension (i.e. confusion and indecision) in shaping their identity. the loss of the concepts of time and place and...

Virtual Reality technology is becoming an increasingly popular in diverse areas from scientific data analysis to entertainment. An important feature of this technology is the Stereoscopic display of computer-generated images to produce three-dimensional visual effects. The visualization tool is an ASCII text file driven system to visually simulate the modeled operation in 3D virtual space. Ster...

We report an electro-optic image shifter to enhance the resolution of display devices with a Pancharatnam-Berry phase deflector (PBD). The switching time of our PBD is less than 1 ms. Through synchronizing and computational factorization, we are able to double the display resolution for reducing the screen door effect. Such a thin and lightweight PBD image shifter can be easily integrated into ...

An on-line computer system was developed for issuing histopathology reports as part of an integrated hospital information system. Input is through a Cossor visual display unit with a typewriter keyboard to a Univac 418 III computer. Stored information is available to authorised hospital staff via similar visual display units located in the wards and laboratories. Existing programs and computer ...

In the next future, 3D-CAD methods will be extensively employed in conjunction with 3D immersive displays, so called Virtual Environments (VE). These may dramatically improve the possibilities of visualization and interaction offered by common 2D display CAD workstations. Thus, ergonomic evaluation needs to be made as to how the computer-generated object is represented on 3D immersive display (...

We describe a virtual sculpture environment suited to the needs of artists. In this approach, the user is immersed in a virtual environment by the use of haptic devices and immersive display. The project is focused around four main research topics: the sculpture model, the tools and their actions on the model, the display of the sculpture, and the interface between the artist and its virtual wo...

The Web is a large collection of heterogeneous pages. Web documents are not always descriptive and accurate in content. In addition, a significant difference between the problems of Web search and traditional text search is the availability of hyperlinks between pages. A page on the Web might possibly be cited by or cite other pages. When evaluating a page, the neighborhood of the page might be...

Augmented reality requires accurate alignment of virtual objects with objects in the real world. This requires extremely low endto-end latency from tracking to display. For mobile use these requirements are even more difficult to achieve when one considers the unrestricted situation of a user walking around and using a wireless, wearable unit that should be small and have low power consumption....