https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/109 2026-05-06T03:09:47Z https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/8297 Title: Effective connectivity alteration according to recurrence in transient global amnesia Authors: Lee, Dong Ah; Lee, Sungjoon; Kim, Due Won; Lee, Ho-Joon; Park, Kang Min Abstract: Purpose This study aimed to evaluate alterations in structural covariance network and effective connectivity of the intrahippocampal circuit in patients with transient global amnesia (TGA). We also investigated whether there were differences of them according to recurrence. Methods We enrolled 88 patients with TGA and 50 healthy controls. We classified patients with TGA into two groups: the single event group (N = 77) and recurrent events group (N = 11). We performed volumetric analysis using the FreeSurfer program and structural covariance network analysis based on the structural volumes using a graph theoretical analysis in patients with TGA and healthy controls. The effective connectivity of the intrahippocampal circuit was also evaluated using structural equation modeling. Results There were no significant differences between patients with all TGA events/a single TGA event and healthy controls with regard to global structural covariance network. However, patients with recurrent events had significant alterations in global structural covariance network with a decrease in the small-worldness index (0.907 vs. 0.970, p = 0.032). In patients with all events/a single, there were alterations in effective connectivity from the entorhinal cortex to CA4, only. However, in patients with recurrent events, there were alterations in effective connectivity from the subiculum to the fimbria as well as from the entorhinal cortex to CA4 in bilateral hemispheres. Conclusion Our study revealed significant alterations in structural covariance network and disruption of the intrahippocampal circuit in patients with TGA compared to healthy controls, which is more prominent when amnestic events recurred. It could be related to the pathogenesis of TGA. 2021-09-01T00:00:00Z https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/9632 Title: Analysis of Monohull Design Characteristics as Supporting Vessel for the COVID-19 Medical Treatment and Logistic Authors: Febrianto, R.A.; Prabowo, A.R.; Baek, S.J.; Adiputra, R. Abstract: The world is being hit by a health crisis by the COVID-19 pandemic which has infected peoples across the globe. The cases of COVID-19 in Indonesia itself continue to increase every day. The transportation sector is one of the sectors that have experienced numbers of direct impacts as a result of large-scale social restriction in form of preventive regulation. Furthermore, this phenomenon causes health agencies to experience difficulties in distributing logistics for handling COVID-19, especially in water areas. In the era of the Industrial Revolution 4.0, various society aspects and industrial processes are digitally connected to increase productivity, especially for COVID-19 treatment and logistic handling. This research was conducted to analyze several proposed monohull-unmanned ship prototypes which are expected to be a proposed solution to assist COVID-19 countermeasure. A series of stability and motion analyses is conducted, then the results are assessed to conclude the best design among the proposed design options. Results of the study indicated that compared to three variations of hull types, design of the Model III has excellent characterisics of ship stability, hull resistance and seakeeping. These analysis parameters are considered as main criteria in the ship's requirements since patient and logistic have to be transported safely to the designated location according to the given mission in assisting COVID-19 handling and treatment. ？ 2021 Elsevier B.V.. All rights reserved. 2021-07-01T00:00:00Z https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/9647 Title: 공기윤활에 의한 액화천연가스운반선의 마찰저항저감 평가 및 공기 분사부 배치에 대한 연구 Authors: 김희택; 김형태; 김현조; 김정중 Abstract: Brake Horse Power (BHP) reduction ratios by air injection to the underside of the hull surface in an actual ship are predicted using an unstructured finite-volume CFD solver and compared with the sea trial results. In addition, air lubrication system installed on the existing vessel is investigated to find a good solution for additional drag reduction. As a results, it is found that the thickness of the air layer should be minimized within a stable range while securing the area covered by the air layer as much as possible. Furthermore, the amount of frictional drag reduced by air injection is found to be independent of surface roughness and still effective on rough surface. Based on the results of this study, it is expected that systematic and reliable air lubrication system can be designed and evaluated using the proposed method. 2021-06-01T00:00:00Z https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/8330 Title: Safety-zone layout design for a floating LNG-Fueled power plant in bunkering process Authors: Park, Sung-In; Kim, Su-Kyeong; Paik, Jeom Kee Abstract: The use of natural gas (NG) as an energy source is increasing. This paper studies the safety-zone layout design of a floating power plant fueled by NG. Hazards from the unwanted release of liquefied NG (LNG) in bunkering or NG in operation always exist, and it is thus important to reduce the associated risk to an acceptable level. One engineering technique used to reduce this risk involves the design of a safety zone to prevent and minimize exposure to unwated release of LNG or NG that may occur during the bunkering process. Industry practices are available for the design of the layout of such safety-zones, but their applicability to floating power plants is uncertain, and a more intuitive approach is required. The objective of this study is to discuss the challenges of establishing safety zones on floating power plants by reviewing and comparing existing industrial practices and to propose a hybrid approach for the design of a safety-zone layout. The applicability of the proposed hybrid approach is discussed with an applied example. 2020-01-15T00:00:00Z