ON THE NECESSARY BUT SUFFICIENT AMOUNT OF GREASE TO OBTAIN FULLY LUBRICATED FRETTING REGIME IN MOIST AIR FOR SUJ2 BEARING STEEL AGAINST S15C CARBON STEEL

Influence of the moist air humidity (10-70%) on the fretting characteristics of steels under grease lubrication is experimentally investigated.Ball (bearing steel, JIS SUJ2) on disk (carbon steel, JIS S15C) type fretting tests for 0-20 mg of grease supplied before each test at the punctual contact between ball and disk were conducted at 50 μm sl

Introduction.An international analysis of academic journals newly created in the period from 2011 to 2020 according to type of publisher, place of publication, their relationship with open access, and their indexing in databases.Studies of the issues of concentration of journal publisher ownership, uses of metrics, and access to titles reveal a cha

Line structured light (LSL) measurement systems can obtain high accuracy profiles, but the overall clarity relies greatly on the sampling interval of the scanning process.Photometric stereo (PS), on the other hand, is sensitive to tiny features but has poor geometrical accuracy.Cooperative measurement with these two methods is an effective way to e

Five studies demonstrated that people selectively use general moral principles to rationalize preferred moral conclusions.In Studies 1a and 1b, college students and community respondents were presented with variations on a traditional moral scenario that asked whether it was permissible to sacrifice one innocent man in order to save a greater numbe

We discuss the importance of boundary effects on fermionic matter in a rotating frame.By explicit calculations at zero temperature we show that the scalar condensate of fermion and anti-fermion cannot be modified by the rotation once the viqua-f4 boundary condition is properly implemented.The situation is qualitatively changed at finite temperature