https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/9817 Sun, 03 May 2026 02:43:25 GMT 2026-05-03T02:43:25Z https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/11012 Title: CFD 기반 자항 해석의 격자 민감도 정량 평가 Authors: 안준범; 김백현; 이상봉; 심민경; 손석호; 김정중 Abstract: This study performs resistance and self-propulsion simulations for four ship types using computational fluid dynamics(CFD) and evaluates the impact of grid resolution on prediction accuracy and numerical convergence. A total of 56 cases were analyzed by applying coarse, medium, and fine mesh systems. Convergence behavior was assessed based on the Grid Convergence Index(GCI) methodology. Among the 56 cases, 42 were included in the GCI analysis, showing order of convergence(p) greater than 1.5 and grid uncertainty(UG) below 3% in most conditions. In particular, when over 10 million cells were used, simulation results showed consistent trends across different speeds within the same hull form, indicating robust convergence and reliability. Although a few cases were excluded due to irregular convergence behavior, their impact on the overall tendency was negligible. The findings provide practical guidelines for grid arrangement and uncertainty quantification in CFD-based ship performance predictions. Mon, 01 Dec 2025 00:00:00 GMT https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/11012 2025-12-01T00:00:00Z https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/10962 Title: Acoustic characterization of fish and macroplankton communities in the seychelles-chagos thermocline ridge of the southwest Indian ocean Authors: Kang, Myounghee; Oh, Sunyoung; Oh, Wooseok; Kang, Dong-Jin; Nam, SungHyun; Lee, Kyounghoon Abstract: In this study, we describe the dynamics of the sound scattering layers (SSLs), particularly those of fish and macroplankton communities in the epipelagic layer, in the Seychelles-Chagos Thermocline Ridge (SCTR) of the southwest Indian Ocean using hydroacoustic data, net sampling, and oceanographic information. Overall, the acoustic backscattering values of the fish community were considerably higher than those of the macroplankton. Both communities were more densely distributed in the SCTR than in its surrounding region. On the vertical profile, the acoustic peak of the fish community was at 17 m during the day; however, considerably high values of up to 82 m were observed at night. Below 26 m, macroplankton was seldom found, regardless of the time. Hydrographic properties, such as temperature, salinity, dissolved oxygen (DO), and chlorophyll fluorescence, in the SCTR, were similar; however, an area at 5？8°S, 67°E was cooler, saltier, and had slightly lower DO. Weak or moderate positive correlations were observed between acoustic and hydrographic features. Based on all net samples, the most abundant taxon in terms of the total number of samples was found to be krill (Euphausiacea, 81%), followed by lantern fish (Myctophum punctatum, 12%). Understanding the dynamics of SSLs, particularly epipelagic organisms, will help to better clarify the important ecological roles of these organisms and their ability to facilitate vertical incorporation into marine food webs. ？ 2023 Tue, 01 Oct 2024 00:00:00 GMT https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/10962 2024-10-01T00:00:00Z https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/10996 Title: Reliable Fabrication Techniques of SiNW Based Nanosensors Authors: Kim, Bruce; Aleem, M.; Selvarathinam, T.; Kundu, S.; 이정희; Park, J. Abstract: This paper provides silicon nanowire based nanosensors with fabrication techniques that would reduce contamination due to intrinsic properties of silicon nanowires. We provide surface functionalization for explosive analytes such as TNT and RDX analytes. We provide FTIR characterizations of functionalized silicon nanowires to validate surface modification. ？ 2023 IEEE. Wed, 01 Nov 2023 00:00:00 GMT https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/10996 2023-11-01T00:00:00Z