Single-atom Pd clusters anchored on t-BaTiO3 material was synthesized using hydrothermal and ultrasonic methods for the effective piezoelectric catalytic degradation of pollutants using vibration energy. XRD patterns of BaTiO3 loaded with monoatomic Pd were obtained before and after calcining, and showed typical cubic-phase BTO. TEM and HAADF-STEM images indicated single-atom Pd clusters were successfully introduced into the BaTiO3. The piezoelectric current density of the prepared Pd-BaTiO3 binary composite was significantly higher than that of the pristine BaTiO3. Under mechanical vibration, the nanomaterial exhibited a tetracycline decomposition rate of ~95 % within 7 h, which is much higher than the degradation rate of 56.7 % observed with pure BaTiO3. Many of the piezo-induced electrons escaped to the Pd-doped BaTiO3 interface because of Pd’s excellent conductivity. Single-atom Pd clusters help promote the separation of the piezo-induced electrons, thereby achieving synergistic catalysis. This work demonstrates the feasibility of combining ultrasonic technology with the piezoelectric effect and provides a promising strategy for the development of ultrasonic and piezoelectric materials.

Indonesia is a disaster-prone archipelagic country and one of the world's largest emitters. Climate change has increased the risk of disasters in Indonesia, such as rising sea levels leading to floods. This is undoubtedly a threat to the Indonesian population in coastal areas and small islands. They will be forced to become Internally Displaced Persons (IDPs) if sea levels continue to rise and drown their houses. The number of IDPs in Indonesia has increased significantly in recent years. While IDPs have a legal status and are entitled to protection from the state, there is unfortunately no specific provision for IDPs due to climate disasters in Indonesia. This article examines the legal protection afforded to IDPs in Indonesia as a result of climate-related disasters; deals with the existing legal framework for IDPs; and assesses its adequacy in addressing the specific challenges faced by climate-related IDPs.

The legal status of Biodiversity Beyond National Jurisdiction (BBNJ) has been regulated through the High Seas Treaty as a common heritage of humankind. However, there still exist problems related to overlapping areas above the Extended Continental Shelf (ECS). In such areas, a significant continental shelf would fall within national jurisdiction, whereas the water column would be under the regime of the high seas, and BBNJ would be the common heritage of humankind. We argue that, in order to address the overlapping of areas within the superjacent waters in the ECS, a given sui generis status is required, so that the coastal state has a sovereign right to conserve the BBNJ in these areas. This study concludes that the sui generis arrangement should be implemented in the context of an overlapping ECS and its water column. The efforts of the Indonesian government to extend the continental shelf beyond 200 nautical miles constitute an important step in preserving natural resources for future generations.

Recently, China has published the “Security Assessment Measures for Outbound Data Transfers,” a crucial regulation on outbound data flows. This regulation contains strong national security considerations and produces independent and direct legal effects compared with other assessment systems in China’s laws. However, there is a possibility that conflict arises between these measures and the international commitments made by China due to the ambiguity in how "critical data" is defined, the excessive emphasis placed on self-risk assessment, and the arbitrary extension of procedures. Particularly, with China's current application to join the CPTPP, the restrictive measures of its cross-border data flow may appear to violate the obligation of CPTPP, but may be justified through CPTPP’s exception clauses. In light of this, it is necessary for China to adopt a more modest approach to balancing data security with the effort made to promote the flow of cross-border data.

본 연구는 1890년대부터 1930년대까지 한국 선교 현장에서 전도부인 들이 직면했지만 밝혀지지 않은 일상의 어려움을 밝혀내어, 토착 교회의 자립을 도모하는 개신교 선교정책인 네비어스 방법(Nevius Methods)의 포괄적인 이해를 목표로 한다. 통상적으로 지배적인 학계의 시점이 전도부 인들의 수고와 업적을 인정하는 것과는 달리, 본 연구는 전도부인들이 겪은 역경이 토착 교회의 자립을 장려했던 네비어스 방법과 밀접하게 연관되어 있음을 주장한다. 네비어스 방법은 토착 교회가 자립하도록 토착 교회가 스스로 토착 교회 사역자를 세우고 생활비를 부담해야 된다고 주장했다. 이 선교정책은 선교사들에게 한국 교회가 빠르게 성장하는 핵심 으로 여겨지고 있었지만 교회가 재정적인 어려움에 직면하게 될 때 교회 계층의 가장 낮은 위치에 있는 전도부인들이 종종 불리한 처우를 받게 되었다. 본 연구는 1차 원자료에 의존하여, 전도부인들의 경험을 철저하게 조사함으로써 토착 교회의 빠른 성장에 대한 선교사들의 열망과 가난한 선교현장의 혹독한 현실과의 격차에 대해 다룬다.