Kinematical analysis of the nutation speed reducer

This paper discusses the development of a Nutating Speed Reducer (NSR) which is characterized by high reduction ratio, high tooth contact ratio, very high torque to weight/volume ratio, quiet and smooth operation under load and very high efficiency. All of these advantages are due to the presence of conjugate face-gear pairs, which incorporate each other, which called nutating/rotating gear mechanism. Details of the NSR, its kinematics, gear tooth load capacity, and mesh efficiency are explained. The NSR component speeds and speed reduction ratios of the NSR are calculated. Effect of the varying nutation angles on the geometry of the NSR is discussed and compared

Speakers and the Spotlight: Explaining Media Coverage of Leadership in the House of Representatives

Previous scholarship has described how members of Congress struggle to attract media attention. The Speaker of the House, however, is uniquely positioned to drive media agendas. That position may be conditioned though by the framework in which the Speaker operates, shocks to the system of leadership in the House, and the process of legislating. We inquire into the conditions under which the Speaker of the House receives increased or decreased attention from newspapers, network newscasts, and cable newscasts. We also examine the contraction and expansion of the gap between levels of presidential and Speaker coverage. We find that Speaker coverage is often shaped by increases in House polarization, changes in which party holds the position, Speaker scandal, and turning bills into laws.Yeshttps://us.sagepub.com/en-us/nam/manuscript-submission-guideline