A universal joint is a device that transmits the power of a combat vehicle engine to a cooling fan. The power of the engine is transmitted to the universal joint as it is without buffering, and play occurs at the joint between the drive shaft connected to the engine and the driven shaft connected to the cooling fan according to the usage time. Accordingly, the universal joint is periodically replaced, and the criterion for this is the degree of torsion of the universal joint. However, if the universal joint is not properly maintained during the replacement cycle, damage to the universal joint as well as damage to the surrounding power supply may occur. Accordingly, a backlash measuring device was developed to determine the limit of durability of the universal joint, and the limit of durability was derived through regression analysis of the backlash value according to the use time obtained from the accelerated life test.

Over the past decade, the backlash against investment arbitration has become worldwide and correspondingly the investment treaty reform has been undertaken at multiple levels. In this context, a multilateral investment agreement (“MIA”) has been called for as a global effort to address the global backlash. Arguably, the current condition for a MIA might be more favorable than before, as the interests of developed countries and developing countries have changed. After examining the need of a MIA for the global backlash, this paper attempts to explore China’s recent practice in this aspect, including that (1) China’s changing interest in outward foreign direct investment and investment treaty practice reflect the changing landscape of international investment law; (2) the 2016 G20 under China’s presidency achieved the Guiding Principles for Global Investment Policymaking; and (3) China has joined to work on a multilateral framework on investment facilitation at the WTO.

In robotic surgery, a surgeon checks only a surgical site of patient in the progress of surgery by vision and sound information. In order to solve this limited information, the haptic function is necessary. And haptic surgical robot is also necessary to design a haptic master device. The master device for laparoscope operation with cable-conduit was developed in previous research to give haptic function. It suggested a possibility of developing a master device by using the cable-conduit. However, it is very inconvenient to use. Therefore, this paper suggests a new mechanism design structure to solve the problems of the previous work by new forming a new master device. And it has proved that it’s usability is better than previous one. Furthermore it has also experimented and analyzed that a backlash of new master device is compensated by smooth backlash inverse algorithm.