2023년 6월 19일 유엔해양법협약의 세 번째 이행협정인 「해양법에 관한 국 제연합협약에 따른 국가관할권 이원지역의 해양생물다양성 보전 및 지속가능 한 이용에 대한 협정(BBNJ협정)이 채택되었다. BBNJ협정은 현존하는 해양질서의 권한을 저해하지 않는다고 규정하고 있으나, 기존 해양법 질서와의 권한 중 첩 또는 충돌이 발생할 가능성은 존재한다. 따라서 이를 예방하고 해결하기 위 해서는 BBNJ협정과 기존 질서와의 관계에 대한 분석이 필요할 것으로 생각된다. BBNJ협정은 UNCLOS와 일관적인 방법으로 이행되어야 하며, 특히 해양환경 에 대하여 규정하고 있는 제12부와 밀접한 연관성을 가지고 있다. 최근 국제해 양법재판소는 기후변화와 관련하여 권고적 의견에서 UNCLOS와 타 협약과의 관계에 대한 문제와 협약 제12부에 대한 해석을 제시하였다. UNCLOS 제12부 에 대한 ITLOS의 권고적 의견은 BBNJ협정을 포함하여 향후 해양환경 보호 및 보존과 관련된 많은 국제 규범에 영향을 미칠 것으로 예상된다. 이에 본 논문은 기후변화에 대한 권고적 의견에서 보여준 ITLOS의 해석 태 도를 바탕으로 BBNJ협정과 해양환경보호 및 보전에 대한 일반적인 의무관계와 관련 타 국제협약과의 관계, 지역수산기구와의 관계에 대해 분석하였다. 또한 권고적 의견에서 ITLOS가 언급한 UNCLOS의 개방성 및 헌법성과 엄격한 상당 한 주의의무에 대한 문제는 BBNJ협정도 가질 수밖에 없다. 따라서 이에 대해서 도 살펴보았다. 이러한 문제점들은 적용범위에 대한 기준이 부존재하다는 점에 서 출발한다. 따라서 관련 다자조약의 지속적인 체결 및 국제판례의 축적, 관 련 규범들간의 협력을 통하여 최소한의 기준을 마련하는 것이 중요하다고 보여 진다.

As the capacity of renewable power generation facilities rapidly increases, the variability of electric power system and gas turbine power generation is also increasing. Therefore, problems may occur that require urgent repair while the gas turbine rotor is stopped. When the gas turbine rotor turning is stopped and then restarted, if the turning period is not appropriate, severe vibration may occur due to rotor bending. As a result of the experiment, it was confirmed that normal operation is possible when the gap data measured at the start of rotor turning after maintenance work is similar to the existing value. And the vibration value at the start of rotor turning was lower as the rotor temperature was lower or the stop period was shorter.

The tubular link chain conveyor works under very extreme conditions such as high tensile load, friction, and dangerous operating environments. In this study, we propose an optimal design plan for reducing cost and improving performance through weight reduction of tubular link chain conveyors for sludge transport. For light weight of tubular link chain conveyor, the optimization software using SHERPA algorithms, HEEDS was used in conjunction with ANSYS Mechanical V14.5, which is widely used in structural analysis, to achieve optimal tubular link chain. Through the optimization process, 19% light weight was achieved.

A study on the weight reduction of a motor shaft in electric vehicle by using optimum design technique was carried out. The structural analysis of a motor shaft was performed by using ANSYS to investigate the structural safety. We also used HEEDS to find the optimal hollow shaft thickness. When the material of the hollow shaft is changed to SCM822H by using ANSYS 14.5 and HEEDS MDO, the weight could be reduced by about 53 % compared to the conventional solid one. From this study, the optimized dimensions of a hollow shaft were determined for light weight design.

In this study, the TRIZ methods were used to solve the main cause of the ink splashing phenomenon in a tattoo machine. To solve the ink splashing phenomenon that occurs when a tattoo machine is operated, a flow analysis of the needle unit was performed using ANSYS CFX V14.5. From the flow analysis result, it was confirmed that the ink splashing phenomenon of the tattoo machine can be supplemented by the hole leading to the outside to the needle unit of a tattoo machine. In order to diagnose the natural frequencies of the tattoo machine and the resonance phenomenon caused by the excitation of the motor, the natural frequency analysis was performed using the Abaqus/standard frequency analysis technique. From the results of the natural vibration analysis, it was confirmed that no resonance occurred. It is expected that it will contribute to improve the efficiency of the semi permanent cosmetic device with removable ink cartridge.

Currently, the cutting oil supply device is not equipped to cool the cutting oil. Therefore, additional cooling device should be connected to cool the cutting oil. This has the disadvantage of increasing the size of the device and reducing its cooling capability. To overcome these shortcomings, cooling coils are applied to the outside of the cutting oil filtering device to develop a heat exchanger filter for simultaneous coolant filtering and cooling to improve the compactness of the cutting oil supply device and cooling capability of the cutting oil. For the development of heat exchanger filter, flow and heat transfer analysis were performed. Due to the small heat transfer area of 10 cooling coils, less heat exchange occurred. In the 20 cooling coils, the coolant cooling coils prevented smooth flow of the cooling oil in the heat exchanger filter. The cooling efficiency of the 15 cooling coils were best, and the cooling temperature decreased non-linearly as the supply flow rate of the cutting oil increased.

As the demand for high-speed and high-precision machining increases, the need for cooling and filtering of cutting oil is high. A new concept of coolant heat exchange filter is developed by installing cooling coil through which refrigerant(R410-a) passes through the coolant filtering device. For structural safety evaluation of the heat exchanger filter for cutting oil suppling device of machine tool, thermal stress and vibration analysis were performed using ANSYS program. The results of structural and thermal stress analyses have led to the conclusion that the cooling system has structural stability. From modal analysis, first natural frequency is 12.37 hz and deformation is 22.041 mm. Sixth natural frequency is 26.887 hz and deformation is 25.563 mm.