comparison

Системи дистанційного навчання: огляд, аналіз, вибір

Розглянуто основні дидактичні принципи дистанційної та традиційної форм нав- чання. За цими принципами виведено основні функціональні модулі сучасних систем управління дистанційним навчанням. Відповідно до сформульованих модулів здійснено огляд та порівняння щодо наявності та реалізації модулів у системах дистанційного навчання Moodle, Claronline, ATutor, SharePointLMS, Live@EDU, eFront.

RESEARCH ON THE CHARACTERISTICS OF GEAR-CUTTING PROCESSES FOR EXTERNAL AND INTERNAL MESHING USING THE POWER SKIVING METHOD

The results of modelling and investigation of external and internal gear-cutting processes using the power skiving method are presented. The principles of constructing a geometric model of undistorted chip formation are described, based on parameters from which cutting forces are calculated. It is found that, under identical conditions, the cutting force is three times greater when internal gears are cut than when external gears are cut. The influence of this force on the machining error is determined by the gear pitch parameter.

Processing of the length measuring results during comparisons or calibrations the distance meters and total stations on a field comparator

A method has been developed for the adjustment of the results of measurements of length during calibration of a field comparator for verification (calibration) of distance meters and distance metric parts of total stations. The method of processing the results of comparisons of distance meters to the field comparator using the least squares method (LSM) was also developed on its basis. The additive biases of length measurements by each distance meter are evaluated according to the LSM, as well as the biases that are entered to the results of length measurements by each reflector.