In this study, a pulse jet engine that operates without a shutter valve was developed using a reflector. The pulse jet engine has the disadvantage of being noisy and low in efficiency compared to other engines, but has the advantage of a simple structure and no significant limitations on the fuel used, so research is being conducted to apply this engine to industrial fields such as biomass fuel conversion and boiler systems. Various research is being conducted as it becomes the basis of a pulse detonation engine. In this study, a pulse jet engine is designed, manufactured and tested successfully. The developed pulse jet engine can be used as a power source for various transportation methods such as vehicles and hovercraft through improvement.

This study aims to optimize the SDC (Spinning Dust Collector) system in amphibious assault vehicle engines through numerical analysis of dust and moisture particle separation efficiency using CFD-DPM. Focusing on an axial cyclone structure, the research evaluates separation efficiency across various particle sizes and flow conditions. The results demonstrate that vortices generated by cyclone blades play a critical role in influencing particle trajectories and improving separation performance. Additionally, the study highlights the significant impact of engine flow conditions and housing design, emphasizing that their careful optimization enhances the system's efficiency in separating dust and water. These findings offer valuable insights into optimizing inlet and outlet flow paths and cyclone housing design, providing a solid foundation for advancing SDC system performance in high-efficiency engines.

본 연구는 생성적 AI와 언리얼 엔진의 MetaHuman 기술을 통합하여 고급 실시간 디지털 휴먼 시스템을 구현하는 것을 탐구한다. Inworld AI의 NPC 시스템 및 NVIDIA의 Avatar Cloud Engine과 같은 기존 기술 통합 사례를 분석하여 연구에 참고하였으며, MetaHuman의 시각적 사실성과 생성적 AI의 동적 행동을 결합한 새로운 아키텍처를 제안한다. 연구 방법론은 캐릭터 제작, AI 모델 통합, 실시간 성능 최적화를 다루고 있다. 시스템은 렌더링 품질, AI 응답 정확 도, 사용자 경험을 기준으로 평가되었으며, 그 결과 이러한 통합이 보다 반응성 높고 사실적인 디지털 휴먼을 구현할 잠재력을 입증했다. 본 연구는 게임, 교육, 가상 비서 분야에서의 시사점 을 논의하고, 현재의 한계점과 향후 연구 방향을 제시한다. 이를 통해 첨단 AI 기능과 최첨단 실시간 렌더링을 결합한 프레임워크를 제공하여 지능형 가상 캐릭터 개발을 한 단계 발전시키 는 데 기여하고자 한다.

Recently, with the development of industrial technology and the increase of young consumers, engine monitoring devices for small ships are rapidly changing from analog devices to LCD-based digital devices. In addition, consumers’ product selection criteria are gradually increasing in favor of luxurious and emotional products rather than price attractiveness. Therefore, in order to develop differentiated products in marketing, it is necessary to find and improve emotionally attractive quality elements. The purpose of this study is to collect 11 customer requirements related to the emotional quality of DGP (Digital Gauge Panel) for small ships through customer interviews and to find attractive quality elements among the emotional qualities of DGP for small ships. 17 design elements were derived by applying QFD to the collected customer requirements, and they were classified into one-dimensional quality, must be quality, and attractive quality through Kano model analysis, and 6 attractive quality elements were confirmed using Timko customer satisfaction index.

19세기 사진의 등장은 화가들의 리얼리즘과 빛, 색채에 대한 탐구를 심화시켰으며, 모네는 인 상주의의 대표 화가로 빛과 시간의 변화를 통한 새로운 미학을 모색하였다. <Lotus Garden, 1899>(2023)는 게임 엔진으로 활용되고 있는 언리얼 엔진 5를 활용하여 모네의 빛 표현을 디 지털 영상으로 재현한 작품으로, Epic Games Unreal Challenge 학생부 우수작, 2024 GDC Unreal Creator Showcase에 선정되었다. 본 연구는 모네 회화와 사진 매체의 접점을 ‘빛’으 로 정의하고 작품에서 드러난 영상 특성을 분석한 강석범, 전병호(2006)의 연구를 바탕으로, <Lotus Garden, 1899>의 사례를 통해 모네의 주요 빛 표현 특성을 네 가지로 분류하여 언리 얼 엔진 5로 구현하는 방법을 제시하였다. 주요 구현 방식은 첫째, 시간에 따른 빛의 표현 : Ultra Dynamic Sky 시스템을 활용해 시간대별 대기와 태양의 고도 변화를 시뮬레이션하였 다, 둘째, 빛의 산란 : Post Processing Layer를 통해 빛 산란 효과를 적용하여 강렬한 태양 빛의 극적 효과를 구현하였다, 셋째, 사진 기법을 통한 움직임의 포착 : 아웃포커싱과 풀샷 기 법을 통해 움직임이 있는 인상을 포착하고, Cine Camera를 활용해 이를 구현하였다. 넷째, 영상화 : ‘Sequencer’를 통한 빛 표현의 영상화이다.

방대한 빅데이터를 기반으로 발전한 인공지능 기술은 창작과 영상 예술, 인간의 고유 영역으로 여겨졌던 분야에 큰 영향을 미치기 시작했다. 전통적으로 선형적이었던 3D 애니메이션 제작 방식은 AI 이미지 생성 모델을 활용해 초기 기획, 컨셉 및 아이디어를 빠르게 비주얼화하고, 실시간 게임 엔진을 통해 실시간으로 수정 및 개선 작업을 반복하며 완성도를 높이는 비선형 적 방식으로 변화하고 있다. 본 논문에서는 Stable Diffusion의 노드 기반 비주얼 스크립트인 ComfyUI를 활용한 사전 제작 과정과 iClone 및 언리얼 엔진을 통해 디지털 휴먼을 제작하고 구체화하는 일련의 파이프라인을 분석한다. 이를 통해 전통적인 파이프라인을 넘어서는 새로운 예술적 표현의 가능성을 모색한다.

In this article, improvement of heat screen failure for battle tank is proposed. The heat screen applied to protect a cam sensor from engine heat was cracked by vibrations generated in the engine. To solve this problem, the configuration of the heat screen was changed to a structure that can avoid engine vibration levels. The improved heat screen has first mode frequency at 4,000 RPM band outside the main operating range of the engine, and heat dissipation is at the same level as conventional heat screen. As a result, the improved heat screen secured reliability by improving vibration effects by approximately 163% while maintaining heat dissipation performance.

Cars using diesel have always had problems with reducing exhaust fumes, and have been studied steadily in this regard. There were studies on the remanufacturing effect of DOC catalyst deactivated by diesel vehicle smoke reduction device, analysis of vehicle fire accident cases caused by damage to diesel vehicle smoke reduction device, and related studies on the remanufacturing effect of diesel vehicle smoke reduction device DPF. This study also developed a burner system in a smoke reduction device suitable for exhaust engines to completely burn smoke generated by institutions using diesel engines in low-temperature exhaust gases. Following the development of the existing high-performance heater, burner structure capable of maintaining ignition state in exhaust flow, pulsation generated by diesel engines, and exhaust flow control unit, the actual configuration, function and effect of the device, development contents, basic data and abnormalities of the vehicle, and comparison with other developed products.

Cars using diesel have always had problems with reducing exhaust fumes, and have been studied steadily in this regard. There were studies on the remanufacturing effect of DOC catalyst deactivated by diesel vehicle smoke reduction device, analysis of vehicle fire accident cases caused by damage to diesel vehicle smoke reduction device, and related studies on the remanufacturing effect of diesel vehicle smoke reduction device DPF. This study is also to develop an exhaust flow control unit suitable for an exhaust engine to completely burn smoke generated by an engine using a diesel engine in a low temperature exhaust gas. The main systems to be developed are high-performance heaters, burner structures that can maintain ignition in exhaust flows, and exhaust flow control units that reduce exhaust gas backflow effects caused by diesel engines.

ars using diesel have always had problems with reducing exhaust fumes, and have been studied steadily in this regard. There were studies on the remanufacturing effect of DOC catalyst deactivated by diesel vehicle smoke reduction device, analysis of vehicle fire accident cases caused by damage to diesel vehicle smoke reduction device, and related studies on the remanufacturing effect of diesel vehicle smoke reduction device DPF. This study also developed an optimized system for complete combustion of smoke generated by institutions using diesel engines in low-temperature exhaust gases. The main systems to be developed are high-performance heaters, burner structures that can maintain ignition in exhaust flows, and exhaust flow control units that reduce exhaust gas backflow effects caused by diesel engines.

선박 발전기의 여자기는 출력 단자 전압을 일정하게 유지하기 위하여 여자전류 제어를 통해 자속을 조정한다. 여자기 내부에 있는 전압제어기는 통상적으로 비례 적분 제어방식이 사용되는데 게인과 시정수에 의해 결정되는 응답 특성은 적절치 못한 설정값에 의 해 원하지 않는 출력을 내며 이로 인해 선내 전력의 품질과 안정성을 떨어뜨릴 수 있다. 본 논문에서는 IEEE에서 제공하는 AC4A 타입의 여자기 모델을 통해 얻을 수 있는 안정적인 입출력 데이터를 활용하여 신경망 회로를 학습시킨 후 기존의 비례 적분 제어방식의 전압제 어기를 학습된 신경망 회로 제어기로 대체하여 시뮬레이션을 수행하였다. 그 결과 기존 대비 최대 9.63%까지 오버슈팅이 개선되었으며, 안정적인 응답 특성에 대한 우수성을 확인하였다.

Cars using diesel have always had problems with reducing exhaust fumes, and have been studied steadily in this regard. There were studies on the remanufacturing effect of DOC catalyst deactivated by diesel vehicle smoke reduction device, analysis of vehicle fire accident cases caused by damage to diesel vehicle smoke reduction device, and related studies on the remanufacturing effect of diesel vehicle smoke reduction device DPF. This study also developed a burner system in a smoke reduction device suitable for exhaust engines to completely burn smoke generated by institutions using diesel engines in low-temperature exhaust gases. The main systems to be developed are high-performance heaters, burner structures that can maintain ignition in exhaust flows, and exhaust flow control units that reduce exhaust gas backflow effects caused by diesel engines.