Hak-Jin Kim
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View article: Development of CNN-Based Semantic Segmentation Algorithm for Crop Classification of Korean Major Upland Crops Using NIA AI HUB
Development of CNN-Based Semantic Segmentation Algorithm for Crop Classification of Korean Major Upland Crops Using NIA AI HUB Open
Accurately estimating crop cultivation areas is critical for predicting yields and managing overproduction, particularly for staple crops grown in regions like Jeju Island, South Korea, where reporting cultivation areas is mandatory. This …
View article: Development of a Circular Nutrient Solution Management System Using a Cost Function
Development of a Circular Nutrient Solution Management System Using a Cost Function Open
In this study, an ion monitoring system using ion-selective electrodes (ISEs) was developed to maintain nutrient solutions in closed-loop hydroponic systems within plant factories. Based on this monitoring system, an algorithm and individu…
View article: Estimation of Strawberry Canopy Volume in Unmanned Aerial Vehicle RGB Imagery Using an Object Detection-Based Convolutional Neural Network
Estimation of Strawberry Canopy Volume in Unmanned Aerial Vehicle RGB Imagery Using an Object Detection-Based Convolutional Neural Network Open
Estimating canopy volumes of strawberry plants can be useful for predicting yields and establishing advanced management plans. Therefore, this study evaluated the spatial variability of strawberry canopy volumes using a ResNet50V2-based co…
View article: Machine Learning-Powered Forecasting of Climate Conditions in Smart Greenhouse Containing Netted Melons
Machine Learning-Powered Forecasting of Climate Conditions in Smart Greenhouse Containing Netted Melons Open
The greenhouse environment plays a crucial role in providing favorable conditions for crop growth, significantly improving their quality and yield. Accurate prediction of greenhouse environmental factors is essential for their effective co…
View article: Autonomous Robot Racing Competitions: Truly Multivehicle Autonomous Racing Competitions [Competitions]
Autonomous Robot Racing Competitions: Truly Multivehicle Autonomous Racing Competitions [Competitions] Open
based on the teams design choices
View article: Development of Sensor Fusion-based Obstacle Detection and Collision Avoidance Technology for Autonomous Tractor
Development of Sensor Fusion-based Obstacle Detection and Collision Avoidance Technology for Autonomous Tractor Open
자율주행 농기계가 실용화되기 위해서는 농업 환경에서 신뢰할 수 있는 장애물 인식 시스템과 충돌을 방지하는 시스템이 필수적이지만, 카메라나 라이다, 레이더 등의 단일 센서로는 다양한 환경에서도 신뢰할 수 있는 장애물 인식에 한계가 있다. 본 연구에서는 영상 센서 융합기술을 이용하여 실시간으로 장애물을 인식하고 실제 상황에서 충돌 대응이 가능한 자율주행 트랙터의 충돌 방지 시스템을 개발하고자 하였다. 안전의 최우선이 되는 인명 …
View article: Decision-tree-based ion-specific dosing algorithm for enhancing closed hydroponic efficiency and reducing carbon emissions
Decision-tree-based ion-specific dosing algorithm for enhancing closed hydroponic efficiency and reducing carbon emissions Open
The maintenance of ion balance in closed hydroponic solutions is essential to improve the crop quality and recycling efficiency of nutrient solutions. However, the absence of robust ion sensors for key ions such as P and Mg and the couplin…
View article: Quick Turn-based Headland-Turning Control Strategy for an Autonomous Rice Transplanter
Quick Turn-based Headland-Turning Control Strategy for an Autonomous Rice Transplanter Open
Rice transplanters are mechanically designed to sharply enter the adjacent row by disengaging the power of the turning-side rear wheel; thus, a headland-turning method for an autonomous rice transplanter, designed to fit this condition is …
View article: Heterogeneity Assessment of Kenaf Breeding Field through Spatial Dependence Analysis on Crop Growth Status Map Derived by Unmanned Aerial Vehicle
Heterogeneity Assessment of Kenaf Breeding Field through Spatial Dependence Analysis on Crop Growth Status Map Derived by Unmanned Aerial Vehicle Open
The investigation of quantitative phenotypic traits resulting from the interaction between targeted genotypic traits and environmental factors is essential for breeding selection. Therefore, plot-wise controlled environmental factors must …
View article: Short Communication: Spatial Dependence Analysis as a Tool to Detect the Hidden Heterogeneity in a Kenaf Field
Short Communication: Spatial Dependence Analysis as a Tool to Detect the Hidden Heterogeneity in a Kenaf Field Open
Ever since research attention was first paid to phenomics, it has mainly focused on the use of high throughput phenotyping for characterizing traits in an accurate and fast manner. It was recently realized that its use has huge potential i…
View article: Estimation of Greenhouse Lettuce Growth Indices Based on a Two-Stage CNN Using RGB-D Images
Estimation of Greenhouse Lettuce Growth Indices Based on a Two-Stage CNN Using RGB-D Images Open
Growth indices can quantify crop productivity and establish optimal environmental, nutritional, and irrigation control strategies. A convolutional neural network (CNN)-based model is presented for estimating various growth indices (i.e., f…
View article: Improved Position Estimation Algorithm of Agricultural Mobile Robots Based on Multisensor Fusion and Autoencoder Neural Network
Improved Position Estimation Algorithm of Agricultural Mobile Robots Based on Multisensor Fusion and Autoencoder Neural Network Open
High-precision position estimations of agricultural mobile robots (AMRs) are crucial for implementing control instructions. Although the global navigation satellite system (GNSS) and real-time kinematic GNSS (RTK-GNSS) provide high-precisi…
View article: Correction: RGB images-based vegetative index for phenotyping kenaf (Hibiscus cannabinus L.)
Correction: RGB images-based vegetative index for phenotyping kenaf (Hibiscus cannabinus L.) Open
[This corrects the article DOI: 10.1371/journal.pone.0256978.].
View article: RGB images-based vegetative index for phenotyping kenaf (Hibiscus cannabinus L.)
RGB images-based vegetative index for phenotyping kenaf (Hibiscus cannabinus L.) Open
Kenaf ( Hibiscus cannabinus L.) is an industrial crop used as a raw material in various fields and is cultivated worldwide. Compared to high potential for its utilization, breeding sector is not vigorous partially due to laborous breeding …
View article: Water Nitrate Remote Monitoring System with Self-Diagnostic Function for Ion-Selective Electrodes
Water Nitrate Remote Monitoring System with Self-Diagnostic Function for Ion-Selective Electrodes Open
The detection of nitrate pollutants is a widely used strategy for protecting water sources. Although ion-selective electrodes (ISEs) have been considered for the determination of ion concentrations in water, the accuracy of ISE technology …
View article: Deep Learning-Based Cattle Vocal Classification Model and Real-Time Livestock Monitoring System with Noise Filtering
Deep Learning-Based Cattle Vocal Classification Model and Real-Time Livestock Monitoring System with Noise Filtering Open
The priority placed on animal welfare in the meat industry is increasing the importance of understanding livestock behavior. In this study, we developed a web-based monitoring and recording system based on artificial intelligence analysis …
View article: Application of a Spectroscopic Analysis-Based Portable Sensor for Phosphate Quantitation in Hydroponic Solutions
Application of a Spectroscopic Analysis-Based Portable Sensor for Phosphate Quantitation in Hydroponic Solutions Open
Hydroponic plant culturing requires the concentration of nutrients in the supplied solution to be maintained at a constant level. For example, phosphate ion concentration directly affects crop growth, which necessitates the development of …
View article: Design Optimization of Proportional Plus Derivative Band Parameters Used in Greenhouse Ventilation by Response Surface Methodology
Design Optimization of Proportional Plus Derivative Band Parameters Used in Greenhouse Ventilation by Response Surface Methodology Open
Ventilation is one of the most important factors in greenhouse cultivation because the inside temperature of greenhouses rises rapidly in warm climates, and this high temperature may be detrimental to plant growth. The ventilation system i…
View article: Real-time Nutrient Monitoring of Hydroponic Solutions Using an Ion-selective Electrode-based Embedded System
Real-time Nutrient Monitoring of Hydroponic Solutions Using an Ion-selective Electrode-based Embedded System Open
본 연구는 양액 내 존재하는 다량 영양소의 농도를 실시간으로 측정하기 위해 이온 선택 전극 (ISE) 으로 구성된 임베디드 시스템의 개발을 보여준다. NO3, K 및 Ca 이온을 감지하기위한 PVC ISE, H2PO4를 감지하기위한 코발트 전극, 기준 전극, 샘플 용액이 담기는 챔버, 펌프 및 밸브를 사용하여 측정하는 시스템으로 구성된다. 양액 샘플 양 조절과 데이터 수집을 위해서 데이터 Due 보드가 사용되었고, 각각의 샘…
View article: Model Predictive Control via Output Feedback Neural Network for Improved Multi-Window Greenhouse Ventilation Control
Model Predictive Control via Output Feedback Neural Network for Improved Multi-Window Greenhouse Ventilation Control Open
Maintaining environmental conditions for proper plant growth in greenhouses requires managing a variety of factors; ventilation is particularly important because inside temperatures can rise rapidly in warm climates. The structure of the w…
View article: Review: Cost-Effective Unmanned Aerial Vehicle (UAV) Platform for Field Plant Breeding Application
Review: Cost-Effective Unmanned Aerial Vehicle (UAV) Platform for Field Plant Breeding Application Open
Utilization of remote sensing is a new wave of modern agriculture that accelerates plant breeding and research, and the performance of farming practices and farm management. High-throughput phenotyping is a key advanced agricultural techno…
View article: Hybrid Signal-Processing Method Based on Neural Network for Prediction of NO3, K, Ca, and Mg Ions in Hydroponic Solutions Using an Array of Ion-Selective Electrodes
Hybrid Signal-Processing Method Based on Neural Network for Prediction of NO3, K, Ca, and Mg Ions in Hydroponic Solutions Using an Array of Ion-Selective Electrodes Open
In closed hydroponics, fast and continuous measurement of individual nutrient concentrations is necessary to improve water- and nutrient-use efficiencies and crop production. Ion-selective electrodes (ISEs) could be one of the most attract…
View article: Sustainable Agriculture by Increasing Nitrogen Fertilizer Efficiency Using Low-Resolution Camera Mounted on Unmanned Aerial Vehicles
Sustainable Agriculture by Increasing Nitrogen Fertilizer Efficiency Using Low-Resolution Camera Mounted on Unmanned Aerial Vehicles Open
Nitrogen use efficiency in modern agriculture is very low. It means that a lot of synthetic chemicals are wasted rather than utilized by crops. This can cause more problems where the soil surface is thin and rocky like Jeju Island in the R…
View article: Fusion of Spectroscopy and Cobalt Electrochemistry Data for Estimating Phosphate Concentration in Hydroponic Solution
Fusion of Spectroscopy and Cobalt Electrochemistry Data for Estimating Phosphate Concentration in Hydroponic Solution Open
Phosphate is a key element affecting plant growth. Therefore, the accurate determination of phosphate concentration in hydroponic nutrient solutions is essential for providing a balanced set of nutrients to plants within a suitable range. …