Journal of the Korea Academia-Industrial cooperation Society最新文献

An Analysis of Important Factors in Apartment Housing Satisfaction Using AHP 利用 AHP 分析公寓住房满意度的重要因素

Journal of the Korea Academia-Industrial cooperation Society Pub Date : 2024-01-31 DOI: 10.5762/kais.2024.25.1.419

Eai-Sook Ra, Yeon-Soo Shin

引用次数: 0

Proposal of Occupant Dynamics for Validating the Feasibility of Resource Allocation in the Space Programming Process 空间规划过程中验证资源分配可行性的占用者动态建议

Journal of the Korea Academia-Industrial cooperation Society Pub Date : 2024-01-31 DOI: 10.5762/kais.2024.25.1.686

Suk-Tae Kim

引用次数: 0

Utilization of Drone LiDAR for Route Planning of Forest Road and Construction Inspection 利用无人机激光雷达进行林道路线规划和施工检查

Journal of the Korea Academia-Industrial cooperation Society Pub Date : 2024-01-31 DOI: 10.5762/kais.2024.25.1.767

J. Park, Dae-Yong Um

引用次数: 0

Analysis of Technical Efficiency of Sericulture Farmers Using Stochastic Frontier Analysis 利用随机前沿分析法分析养蚕农民的技术效率

Journal of the Korea Academia-Industrial cooperation Society Pub Date : 2024-01-31 DOI: 10.5762/kais.2024.25.1.79

Jaehong Park

引用次数: 0

Evaluation of Stress Intensity Factor at Mode II condition by J integral 通过 J 积分评估模式 II 条件下的应力强度因子

Journal of the Korea Academia-Industrial cooperation Society Pub Date : 2024-01-31 DOI: 10.5762/kais.2024.25.1.611

Won-Beom Kim

引用次数: 0

Development of Sensor Fusion-based Obstacle Detection and Collision Avoidance Technology for Autonomous Tractor 为自主拖拉机开发基于传感器融合的障碍物检测和碰撞规避技术

Journal of the Korea Academia-Industrial cooperation Society Pub Date : 2024-01-31 DOI: 10.5762/kais.2024.25.1.780

Y. Hwang, Chang-Ho Yun, Yong-Hyun Kim, Hak-Jin Kim

{"title":"Development of Sensor Fusion-based Obstacle Detection and Collision Avoidance Technology for Autonomous Tractor","authors":"Y. Hwang, Chang-Ho Yun, Yong-Hyun Kim, Hak-Jin Kim","doi":"10.5762/kais.2024.25.1.780","DOIUrl":"https://doi.org/10.5762/kais.2024.25.1.780","url":null,"abstract":"For the practical implementation of autonomous agricultural machinery, reliable obstacle recognition and collision prevention systems are essential in agricultural environments. This study aimed to develop a collision prevention system for autonomous tractors capable of real-time obstacle recognition and responsive collision avoidance using video sensor fusion technology. Emphasizing human safety as the top priority, the system targeted obstacle recognition specifically for humans and operated within designed risk and warning zone ranges aligned with the tractor's direction. The developed sensor fusion system integrated the robust object classification capabilities of an RGB camera with a lidar sensor for precise distance measurement, achieving synchronization through camera-lidar calibration. The recognition algorithm, based on the YOLO model applied to RGB images, identified humans, while the lidar data projected onto the image measured the relative distance from the tractor. The collision prevention system, relying on the relative distance of recognized obstacles, halted the tractor in hazardous areas, resuming operation once the obstacle cleared. Validation in static and dynamic situations on flat farmland demonstrated a recognition rate exceeding 99% in collision risk zones, a 24 cm RMSE for distance measurement, and a success rate of over 98% in collision prevention and response.","PeriodicalId":112431,"journal":{"name":"Journal of the Korea Academia-Industrial cooperation Society","volume":"494 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140472492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Study on the Prediction of Vibration Characteristics of EMU High-Speed Trains by Speed 按速度预测动车组高速列车振动特性的研究

Journal of the Korea Academia-Industrial cooperation Society Pub Date : 2024-01-31 DOI: 10.5762/kais.2024.25.1.132

Ji-Hwan Shin

{"title":"A Study on the Prediction of Vibration Characteristics of EMU High-Speed Trains by Speed","authors":"Ji-Hwan Shin","doi":"10.5762/kais.2024.25.1.132","DOIUrl":"https://doi.org/10.5762/kais.2024.25.1.132","url":null,"abstract":"An increase in speed of train operation has been planned to prepare for the end of the KTX service life in accordance with the \"400-km/h Master Plan.\" The development of high-speed railway vehicles exceeding 350 km/h is necessary, and it is important to analyze vibration characteristics, which have a significant impact on passenger safety and riding comfort. Also, it is essential to set a direction for improvement. A prediction study was carried out for the vibration characteristics that may occur in electric multiple unit (EMU) high-speed trains at running speeds exceeding 350 km/h. To this end, EMU high-speed trains consisting of two coaches and six locomotives were modeled using SIMPACK software. Measured data during a test run were used to verify this model. Using the verified analysis model, vibration characteristics were predicted and analyzed for each speed from 200 km/h to 400 km/h. Vibration increased linearly with speed, but even at a speed of 400 km/h, the vibration characteristics were much lower than the limit values specified in the EN 14363 standard. In addition, it was confirmed that riding comfort could be achieved using the mean comfort method of EN 12299.","PeriodicalId":112431,"journal":{"name":"Journal of the Korea Academia-Industrial cooperation Society","volume":"10 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140474857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of dam’s parity on growth performance, carcass characteristics and economic efficacy of Hanwoo steers 母牛奇偶性对汉乌牛生长性能、胴体特征和经济效益的影响

Journal of the Korea Academia-Industrial cooperation Society Pub Date : 2024-01-31 DOI: 10.5762/kais.2024.25.1.70

So-Hee Lee, Jong-Suh Shin, S. Cho, G. Son, Eui-Kyung Lee, Nam-Oh Kim, Byoung-Ki Park

引用次数: 0

Flight Trajectory simulation of Low Altitude Glide Maneuvering Missile using pitchturn rate and Impact Point estimation analytics 利用俯仰转弯率和撞击点估计分析法模拟低空滑翔操纵导弹的飞行轨迹

Journal of the Korea Academia-Industrial cooperation Society Pub Date : 2024-01-31 DOI: 10.5762/kais.2024.25.1.714

Dong-Wg Hong, Ju-Hyun Kim

{"title":"Flight Trajectory simulation of Low Altitude Glide Maneuvering Missile using pitchturn rate and Impact Point estimation analytics","authors":"Dong-Wg Hong, Ju-Hyun Kim","doi":"10.5762/kais.2024.25.1.714","DOIUrl":"https://doi.org/10.5762/kais.2024.25.1.714","url":null,"abstract":"Ballistic missiles have an elliptical ballistic trajectory and fall at high speed, so the defence system was able to predict the point of impact. In the paper, the trajectory of a low-altitude glide maneuver type ballistic missile was simulated by adjusting the flight path angle using the pitch turn rate for each flight stage and entering the desired glide altitude during fall. As a result of the analysis, the flight time was longer as the peak altitude was lower and shorter as the peak altitude was higher, which was judged to be because the higher the altitude, the higher the average speed. In addition, the root mean squre error for the impact point of the simulated trajectory and the prediction result of the impact point was obtained. As a result of the prediction, the rmse is more than tens of km, and it was found that it is difficult to predict the point of impact when the missile is in the glide section. The results of this study are expected to be used for threat assessment of ballistic missiles of various trajectories, and for judging and selecting the possibility of engagement of response systems in the future.","PeriodicalId":112431,"journal":{"name":"Journal of the Korea Academia-Industrial cooperation Society","volume":"61 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140476594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The education for Long-Term Care Workers required to use Care Robots: Focusing on Japan Case Review 使用护理机器人所需的长期护理人员教育：聚焦日本案例回顾

Journal of the Korea Academia-Industrial cooperation Society Pub Date : 2024-01-31 DOI: 10.5762/kais.2024.25.1.450

Kyongok Park, Sun-young Lee

引用次数: 0