People are extremely good at hitting falling balls with a baseball bat. Despite the ball's constant acceleration, they have been reported to time hits with a standard deviation of only about 7 ms. To examine how people achieve such precision, we compared performance when there were no added restrictions, with performance when looking with one eye, when vision was blurred, and when various parts...

The Guideline for Good Clinical Practice (GCP) of the International Conference of Harmonisation (ICH) is an international standard for the ethical and scientific quality of the designing, conducting, recording and reporting of trials that involve the participation of human subjects. Today, most regulators and funding agencies follow the ICH guidelines. These were drawn up by a small number of r...

PURPOSE This study aimed to investigate the effect of changing the kilovoltage peak (kVp) on the radiographic assessment of dental caries. MATERIALS AND METHODS Seventy-five extracted posterior teeth with proximal caries or apparently sound proximal surfaces were radiographed with conventional E-speed films and a photostimulable phosphor system using 60 kVp and 70 kVp for the caries assessmen...