Korea Maritime and Ocean University

Multi-tracer evaluation of cesium-137 bioaccumulation and trophic transfer in marine organisms off Jeju Island, Korea

Radionuclides accidentally released from nuclear facilities into the marine environment may affect ecosystems far from their original sources, yet their ecological behavior in such regions remains poorly understood. Using a multi-tracer approach, we evaluated 137 Cs bioaccumulati...

Plateau–Rayleigh Instability–Driven Shell-First Growth of (Ge, Si1– x Ge x )–AlN Core–Shell Crystals Exhibiting Telecom E-Band Photoluminescence

Abstract Si and Ge are technologically important semiconductors for electronic, photovoltaic, and optoelectronic applications. Herein, we report mixed-source hydride vapor phase epitaxial growth of (Ge, Si1–xGex)–AlN core–shell crystals on Al-based nanoabsorbers. Nano-CT and micr...

Enhancing shale gas production forecasting performance using bidirectional gated recurrent unit with integration of attention mechanism and Fourier analysis networks

Recurrent Neural Networks (RNNs) often lose initial training information and treat all time-series data as continuously periodic, which limits their ability to account for production changes in shale gas caused by sporadic non-periodic features. This study aimed to overcome the l...

A New Branchipolynoe (Aphroditiformia: Polynoidae) Scale Worm from the Onnuri Deep-sea Hydrothermal Vent Field, Northern Central Indian Ridge

. Phylogenetic analyses support close relationships between the Indian Ocean and Western Pacific hydrothermal polychaetes. Our data provide a foundation for exploring the evolutionary relationship between scale worms and bathymodiolin mussels.

Shipboard Noise, Sleep Disturbance and Perceived Operational Safety in Maritime Cadets: A Two-Factor Model and Mediation Analysis with Implications for the Review of IMO Noise Limits

Seafarers inhabit acoustically hostile environments continuously across deployment rotations of four to six months, yet how shipboard noise relates to operational-safety risk is poorly characterised. We surveyed 242 maritime cadets with sea-service experience at Korea Maritime an...

Decomposing ship carbon intensity under fuel-intensity regulation: Separating fuel decarbonization from operational energy efficiency

International shipping requires performance indicators that distinguish reductions in operational energy demand from reductions in the life-cycle greenhouse gas (GHG) intensity of marine fuels. The Carbon Intensity Indicator (CII) is emission-based but is often interpreted as a p...

Standards-Attributed Reuse–Retrofit–Replacement Method to Assess Offshore Platform Electrical Power Systems for Repurposing to LNG Regasification or CO2 Injection

Repurposing aging offshore platforms into liquefied natural gas (LNG) regasification or CO2 injection facilities has been gaining attention as a viable alternative in the energy transition. However, a single systematic criterion for determining which equipment of the existing pow...

Stability-Aware Dynamic Load-Shaping Energy Management Strategy for Improving Diesel Generator Operational Stability in Hybrid Shipboard Power Systems

This study proposes a stability-aware load-shaping energy management system (EMS) for a hybrid electric shipboard power system. The proposed EMS uses the energy storage system (ESS) as a dynamic load-shaping buffer to reduce active diesel-generator (DG) low-load exposure and elec...

CFD Analysis of Drag and Internal Volume Tradeoffs in a Compact AUV with a Myring Forebody and Flat Stern

Low-slenderness-ratio, flat-ended autonomous underwater vehicles must balance hydrodynamic resistance against internal volume retention, yet classical slender-body criteria do not fully represent their coupled forebody wake response. A generalized Myring forebody was assessed for...

Instability control and emission characteristics of methane/hydrogen non-premixed flames under DC electric fields

This study experimentally investigated the Kelvin–Helmholtz instability in methane/hydrogen non-premixed flames induced by velocity differences between the fuel jet and co-flow. Using a co-flow burner, various fuel and co-flow velocity conditions were tested to identify the regim...

Inter‐Seasonal In Situ Datasets of Important Physicochemical Parameters Adjacent to the Newly Declared Naf MPA of Bangladesh

ABSTRACT Physicochemical data acquisition was carried out within the northeastern Bay of Bengal (BoB), adjacent to the newly declared Naf Marine Protected Area (Naf MPA) of Bangladesh. A total of 21 sampling locations were covered over shallow coastal water for the study during t...