BRL-CAD interactively displaying, editing, and interrogating geometric models. This suite became known as BRL-CAD. Development on BRL-CAD as a package subsequently began in 1983; the first public release was made in 1984. BRL-CAD became an open-source project in December 2004. The BRL-CAD source code repository is the oldest known public version-controlled codebase in the world that's still under active development, dating back to 1983-12-16 00:10:31 UTC. BRL-CAD BRL-CAD is a constructive solid geometry (CSG) solid modeling computer-aided design (CAD) system. It includes an interactive geometry editor, ray tracing support for graphics rendering and geometric analysis, computer network distributed framebuffer support, scripting,
Computer-assisted personal interviewing may be because wearing headphones increases the insulation of the respondent for external stimuli, and also may be explained by the fact that the recorded human voice in the audio component evokes a more personalized interaction between the respondent and the instrument. Computer-assisted interviewing methods such as CAPI, CATI, or CASI, have been the focus of systematic reviews on the effects of computer-assisted interviewing on data quality. Those reviews indicate that computer-assisted methods are accepted by both interviewers and respondents, and these methods tend to improve data quality. In a study that compared Audio-CASI with paper SAQs and Video-CASI, researchers