Joo‐Ho Lee

ORCID: 0000-0003-1015-5615
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About
Contact & Profiles
Research Areas
  • Robotics and Automated Systems
  • Robotics and Sensor-Based Localization
  • Robotic Path Planning Algorithms
  • Modular Robots and Swarm Intelligence
  • Plasma Diagnostics and Applications
  • Video Surveillance and Tracking Methods
  • Advanced Image and Video Retrieval Techniques
  • Semiconductor materials and devices
  • Advanced Vision and Imaging
  • Interactive and Immersive Displays
  • Teleoperation and Haptic Systems
  • Augmented Reality Applications
  • Context-Aware Activity Recognition Systems
  • GaN-based semiconductor devices and materials
  • Face recognition and analysis
  • Thin-Film Transistor Technologies
  • Gaze Tracking and Assistive Technology
  • Human Pose and Action Recognition
  • Metal and Thin Film Mechanics
  • Indoor and Outdoor Localization Technologies
  • Silicon Carbide Semiconductor Technologies
  • 3D Surveying and Cultural Heritage
  • Stroke Rehabilitation and Recovery
  • Underwater Vehicles and Communication Systems
  • Plasma Applications and Diagnostics

Ritsumeikan University
2016-2025

Pohang Iron and Steel (South Korea)
2023-2024

Seoul National University
1998-2024

Samsung (South Korea)
2006-2024

Pusan National University
2011-2024

Chungbuk National University
2005-2024

Hanbat National University
2024

Sangmyung University
2023-2024

Purdue University West Lafayette
2024

Daelim University College
2024

We report the presence of defects in CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub>, which is one main factors that deteriorates performance perovskite solar cells.

10.1039/c7ee00303j article EN Energy & Environmental Science 2017-01-01

Optogenetics refers to a technique that uses light modulate neuronal activity with high spatiotemporal resolution, which enables the manipulation of learning and memory functions in human brain. This strategy controlling using can be applied for development intelligent systems, including neuromorphic in-memory computing systems. Herein, flexible van der Waals (vdW) optoelectronic synapse is reported, core component optogenetics-inspired fabricated on 2D vdW layered rhenium disulfide (ReS2 )...

10.1002/adma.202102980 article EN Advanced Materials 2021-08-22

This paper describes our concept of Intelligent Space. Spaces are rooms or areas that equipped with sensors, which enable the spaces to perceive and understand what is happening in them. With such features, people systems Space can use additional functions afforded by space. research field itself not particularly related robotics, but we believe robots under have many interesting features. expected a broad range applications as homes, offices, factories, etc. Thus, consider robot, will be...

10.1163/156855302760121936 article EN Advanced Robotics 2002-01-01

The robots that will be needed in the near future are human-friendly able to coexist with humans and support effectively. To realize this, need close proximity each other as much possible. Moreover, it is necessary for their interactions occur naturally. It desirable a robot carry out human following, one of human-affinitive movements. human-following requires several techniques: recognition target human, environment around robot, control strategy following stably. In this research, an...

10.1109/tie.2003.821894 article EN IEEE Transactions on Industrial Electronics 2004-02-01

Mobile robots need sufficient sensors and information on the environment in order to navigate. In this paper, we propose a system of mobile robots, which is controlled distributed intelligent sensor network. such networked space, divided by sensors. Each area monitored device, connects with other devices throughout As result, are able accomplish tasks simply following orders from environment, although not self-contained for self-positioning control. We test several situations verify proposed system.

10.1109/tie.2003.817488 article EN IEEE Transactions on Industrial Electronics 2003-10-01

Multi-valued logic (MVL) technology that utilizes more than two states has recently been reconsidered because of the demand for greater power saving in current binary systems. Extensive efforts have invested developing MVL devices with multiple threshold voltages by adopting negative differential transconductance and resistance. In this study, a reconfigurable, negative-differential-resistance (m-NDR) device an electric-field-induced tunability is reported, which comprises BP/ReS2...

10.1002/adma.202202799 article EN Advanced Materials 2022-07-20

The origins of the high device performance and degradation in air are greatest issues for commercialization perovskite solar cells. Here this study investigates possible mixed cells by monitoring defect states compositional changes layer over time. results deep-level transient spectroscopy analysis reveal that a newly identified formed Br atoms exists at deep levels film, its state shifts when film is aged air. change originated from loss methylammonium molecules layer, which decreased JSC ,...

10.1002/adma.201805438 article EN Advanced Materials 2019-01-07

Abstract Gait analysis has been studied for a long time and applied to fields such as security, sport, medicine. In particular, clinical gait played significant role in improving the quality of healthcare. With growth machine learning technology recent years, deep learning-based approaches have become popular. However, large number samples are required training models when using learning, where amount available gait-related data may be limited several reasons. This paper discusses certain...

10.1093/jcde/qwab054 article EN cc-by-nc Journal of Computational Design and Engineering 2021-09-12

Traditional methods for visualizing dynamic human expressions, particularly in medical training, often rely on flat-screen displays or static mannequins, which have proven inefficient realistic simulation. In response, we propose a platform that leverages 3D interactive facial avatar capable of displaying non-verbal feedback, including pain signals. This is projected onto stereoscopic, view-dependent display, offering more immersive and simulated patient experience assessment practice....

10.48550/arxiv.2502.08085 preprint EN arXiv (Cornell University) 2025-02-11

10.1109/iceic64972.2025.10879770 article EN 2020 International Conference on Electronics, Information, and Communication (ICEIC) 2025-01-19

Intelligent spaces are rooms or areas that equipped with sensors such as microphones cameras enable them to perceive what is happening in them. In have an intelligence of their own a world model no longer something the robot has alone but service offered by information infrastructure space. this article we show how intelligent space can generate topological map for robots looking at movements people room. We describe stereo vision system capable tracking 3D several humans real time and give...

10.1109/iros.1997.656464 article EN 2002-11-23

Previously developed discrete layer mechanics are extended to incorporate thermal effects account for the complete coupled mechanical, electrical, and response of piezoelectric composite beams. Thermal in both elastic media captured at material level. This unified representation leads an inherent capability model sensory active responses beams environments. Finite element equations implemented a beam with linear shape functions. Results from current formulation compared results conventional...

10.2514/3.13217 article EN AIAA Journal 1996-06-01

In this work, we propose a system that has the ability to reproduce imitated motions of human during continuous and online observation with humanoid robot. order achieve goal, problems for imitation have be solved. paper, treat two main issues. One is mapping between different kinematic structures other computing body pose satisfies static stability generated from motion obtained by visual capture humanoid. The experimental results based on Webots simulation subsequent execution Darwin-OP...

10.1109/sii.2012.6427340 article EN 2022 IEEE/SICE International Symposium on System Integration (SII) 2012-12-01

This paper explores the distribution and features of residual stresses formed by super duplex stainless steel pipe welding. Experimental investigations, which encompass an elevated temperature tensile test metallographic observation along with a hardness stress measurement, were first conducted to obtain mechanical properties at high base metal temperatures confirm whether or not undergoes martensitic phase development during welding process. Finally, experiments performed scrutinize...

10.3390/met14020136 article EN cc-by Metals 2024-01-23

This study utilized cellulose-based external light extraction films to enhance the outcoupling efficiency of organic light-emitting diodes (OLEDs). These were created through a straightforward fabrication employing biopolymers hydroxyethyl cellulose (HEC) and tannic acid (TA). We observed that hydrogen bonding between HEC TA could spontaneously generate random microtextured surface on HEC: films. Furthermore, morphology HECTA film can be adjusted by varying content. When applying as an...

10.1080/15980316.2024.2325357 article EN cc-by Journal of Information Display 2024-03-05
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