Soft-and hard-tissue changes after extraction space closure with micro-screw implant

The diameters of the post extraction spaces and curvature of spee\'s curve measured at the time of 4 months after the first premolar\'s extraction were compared with that mea-sured at the time of 30 minutes after the first premolar\'s extraction.

In the frame of the revised outer gap model,study the non-thermal X-ray radiation of seven old pulsars observed by Chandra, the predicted values are consistent with the observed date, and calculate the non-thermal X-ray luminosity of old pulsars with outer gaps, and compute the gamma-ray luminosity and gamma-ray fluxes of these old pulsars with outer gaps.

This paper studies the outer gap model of pulsars,analyzes the differences between traditional outer gap model and the new one,and points out that the electric field created from the pulsar surface is very strong but the electric field along the magnetic field is almost zero,and charged particles are accelerated to relativistic energy in outer gap resulting in high energy radiation.

Study on the Automatic Testing Method for the Clearance of Automobile Transmission System;

Discusses on the Automatic Detection Method for Clearance at Wheel Hub Bearing and Kingpin;