Although school libraries have existed in Israel for several decades, some of them dating back to the 50's, issue censorship has not been studied. The objective this full-blown study was empirically assess current state a large sample high Israel, following an exploratory study. comprised 98 schools, from both 'religious' and `nonreligious' sectors. main research tool two-parts questionn...

A general multi-user undo/redo model must satisfy several requirements It must be compatible with an existing single-user undo/redo model, give individual users autonomy in executing undo/redo commands, support undo/redo of remote commands and the remote effects of local commands, be independent of the coupling, multicast, and concurrency control model, and allow undo/redo of arbitrary commands...

Future Lunar missions will require significant and speedy traverses of the terrain by robotic vehicles. Because of the Moon’s proximity to the Earth it is very tempting to tele-operate robotic vehicles from the Earth, rather than have them operate autonomously. We have found that operators quickly develop the ability to predict the effect of their commands but have difficulty synchronizing thei...