vAcademia is a 3D virtual world designed for collaborative learning. It enables a new approach to educational activities in virtual worlds, which is based on a new vision of content and learning process. The most distinct feature of vAcademia is 3D recording which allows capturing everything in a given virtual world location in dynamics. The resultant recordings can be not only watched later, b...

In this paper, we present a system that combines Augmented Reality and autostereoscopic visualization. We also report a study for comparing different aspects using an autostereoscopic display and a common display, in which 44 children aged from 8 to 10 years old have participated. From our study, statistically significant differences were found between both displays for the depth perception and...

The use of virtual simulation-based training continues to expand, as organizations explore alternative methods to reduce the cost of training. While virtual simulation has been empirically validated to be effective in the transfer of skills to the live environment, what is still unknown is what effect, if any, that an individual’s sense of presence in the simulation has on their performance. In...

The concept of "presence" is a major part of the discourse of VR. Creating a sense of presence can be crucial to the effectiveness of museum exhibits and VR presentations. Sound can play various roles in technology-based presentations, by creating or enhancing a sense of presence, and providing a continuity of experience. This paper discusses these points and how presence and sonic identificati...

In this paper we describe the results of experiments whose goal is to investigate the effect of enhancing a virtual reality experience with the sound of synthetic footsteps. Results show that the sense of presence is enhanced when the sound of one’s own motion is added. Furthermore, the experiments show that the threshold for detection of latency between motion and sound is raised when visual s...

In this paper, we aim to study virtual presence in blogging communities. We argue that though some conceptualization of virtual presence has been made, this only took account of one’s presence among a community of ‘known’ others. Increasingly, however, in blogging and other online communities, users do not necessarily know ‘the others’ but yet they interact with them and develop friendships and...

a synthesis of well logs was carried out and drilling mud weight data were analyzed to figure outanomalous high fluid pressure within the triassic evaporitic cap rock (the dashtak formation) andstudy its impact on the geometry of anticlinal traps in the gas rich gavbandi province located in thesoutheast part of the zagros mountains. the results indicated that the location of anticlinal traps at...

In this paper the design, implementation and testing of the Location-Based game Passing On is explored. It is a multi-player game for mobile phones, with a focus on asymmetric and limited communication. While one player can communicate by talking, the other can answer only by knocking. This limited and asymmetric communication became one of the central gameplay resources in the game, shaping mu...

Acrophobia has been treated using exposure in imagination, exposure “in vivo”, and Virtual Reality (VR). This paper presents the development of an Augmented Reality (AR) system and a VR system that includes acrophobic scenarios. A study involving both these systems and non-phobic users has been carried out in order to compare the levels of presence and anxiety. In the acrophobic scenario, the f...