OBJECTIVE To document infrastructure, personnel, procedures performed, and supplies and equipment available at all county hospitals in Liberia using the World Health Organization Tool for Situational Analysis of Emergency and Essential Surgical Care. DESIGN Survey of county hospitals using the World Health Organization Tool for Situational Analysis of Emergency and Essential Surgical Care. ...

BACKGROUND To determine if edentulism, controlling for other known factors, is associated with subjective self-report health status (SRH) in Mexican adults. MATERIAL AND METHODS We examined the SRH of 13 966 individuals 35 years and older, using data from the National Survey of Performance Assessment, a cross-sectional study that is part of the technical collaboration between the Ministry of ...

With the rapid development of virtual reality (VR) technology, VR glasses, a.k.a. Head-Mounted Displays (HMDs) are widely available, allowing immersive 3D content to be viewed. A natural need for truly immersive VR is to allow bidirectional communication: the user should be able to interact with the virtual world using facial expressions and eye gaze, in addition to traditional means of interac...

This paper describes the development of an Immersive Learning Virtual Reality Environment (ILVRE) system that can be used as a teaching and learning tool. The system consists of four major components; hardware, interaction technique, software development tool, and teaching/learning content. The fourth component i.e. teaching/learning content has three sub-components; Instructor/Administrator Mo...

A series of virtual reality based educational modules are being developed to explore the capabilities of this emerging technology, and to determine how and where virtual reality can provide the greatest benefits to engineering educators. The most advanced application, Vicher, has been significantly expanded and split into two modules. Student evaluations of a newly developed safety analysis mod...

This paper introduces prominent topics of our Mixed Reality (MR) project and states what kind of role computer vision and graphics play in the project. MR is a part of VR in broader sense, but it treats the physical space as well as the virtual space created in computers. Here we use the term “mixed reality” instead of often used “augmented reality (AR).” This is because MR is not only the mixt...

This paper aims to introduce the concept of using a combination of virtual reality (VR) and video technologies in order to provide a shared environment for video conferencing and to address some important but different problems that have been pinpointed with both types of system. The paper begins by briefly reviewing these two technologies. Following this, a prototype system called Vivid is pre...

With the growth of the World Wide Web (WWW), the needs of representing 3D world on Internet have increased rapidly. To this VRML97 has played an important role in the growth. The present time, there are a many VRML browser based on OpenGL and Direct3D rendering libraries, and Sun Microsystems has already prototyped a 3D browser. We describe a certain event model is used to implement our Java3D-...