Kyung-Chang Lee

ORCID: 0000-0002-9749-8022
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About
Contact & Profiles
Research Areas
  • Real-Time Systems Scheduling
  • Network Time Synchronization Technologies
  • Embedded Systems Design Techniques
  • Petri Nets in System Modeling
  • IoT-based Smart Home Systems
  • Fault Detection and Control Systems
  • Energy Efficient Wireless Sensor Networks
  • Embedded Systems and FPGA Design
  • Wireless Networks and Protocols
  • Context-Aware Activity Recognition Systems
  • Sensor Technology and Measurement Systems
  • Indoor and Outdoor Localization Technologies
  • Advanced Sensor and Energy Harvesting Materials
  • Metal-Catalyzed Oxygenation Mechanisms
  • Internet of Things and Social Network Interactions
  • Real-time simulation and control systems
  • Vehicular Ad Hoc Networks (VANETs)
  • Risk and Safety Analysis
  • Flexible and Reconfigurable Manufacturing Systems
  • Educational Systems and Policies
  • Engineering Applied Research
  • Vehicle Dynamics and Control Systems
  • Tactile and Sensory Interactions
  • Metalloenzymes and iron-sulfur proteins
  • Software Reliability and Analysis Research

Pukyong National University
2013-2025

Pusan National University
2001-2024

Seoul National University
2008-2022

Ann Arbor Center for Independent Living
2022

University of Richmond
2022

Oregon Medical Research Center
2022

Lindsay Unified School District
2022

New York Proton Center
2022

Communities In Schools of Orange County
2022

Yeungnam University
2015-2020

Smart home is expected to offer various intelligent services by recognizing residents along with their life style and feelings. One of the key issues for realizing smart how detect locations residents. Currently, research effort focused on two approaches: terminal-based non-terminal-based methods. The method employs a type device that should be carried resident while requires no such device. This paper presents novel approach using an array pyroelectric infrared sensors (PIR sensors) can...

10.1109/tce.2006.273150 article EN IEEE Transactions on Consumer Electronics 2006-11-01

The industrial network, often referred to as fieldbus, becomes an indispensable component for intelligent manufacturing systems. Thus, in order satisfy the real-time requirements of field devices such sensors, actuators, and controllers, numerous fieldbus protocols have been developed. But, application has limited due high cost hardware difficulty interfacing with multivendor products. As alternative Ethernet (IEEE 802.3) technology is being adapted environment. However, crucial technical...

10.1109/tie.2006.881986 article EN IEEE Transactions on Industrial Electronics 2006-10-01

The suf operon encoding a Fe-S assembly system is induced by peroxides through activators OxyR and IscR in Escherichia coli. For apo-IscR to bind, oxidation-mediated dissociation of Fur required. Therefore, peroxide-responsive signal transduced OxyR, IscR, achieve oxidation-sensitive maximal induction this operon.

10.1128/jb.01161-08 article EN Journal of Bacteriology 2008-10-11

Intelligent home service systems consist of ubiquitous sensors, a network, and context-aware computing system that together collect residential environment information provide intelligent services such as controlling the or lighting. Determining resident's location in smart office is key to system. This correspondence presents an enhanced location-recognition algorithm using Bayesian classifier for pyroelectric infrared sensor-based indoor location-aware nonterminal-based proposed previous...

10.1109/tsmcc.2008.2008099 article EN IEEE Transactions on Systems Man and Cybernetics Part C (Applications and Reviews) 2009-02-20

The accurate detection of tire tread wear plays an important role in preventing tire-related accidents. In previous studies, is performed by interpreting mathematical models and characteristics. However, this approach may not accurately reflect the real driving environment. study, we propose a system that utilizes machine learning to provide results under real-road conditions. proposed comprises (1) intelligent samples measured acceleration signals processes them dataset, (2) preprocessing...

10.1109/access.2023.3263727 article EN cc-by-nc-nd IEEE Access 2023-01-01

This paper presents a network-based fire-detection system via the controller area network (CAN) to evaluate feasibility of using such home automation protocol in smart home. In general, conventional has several shortcomings, as weakness noise, because it uses an analog transmission with 4-20 mA current lines. Hence, alternative system, this describes structure CAN-based and design method CAN communication network. The performance proposed is evaluated through experimental tests. advantages,...

10.1109/tce.2004.1362504 article EN IEEE Transactions on Consumer Electronics 2004-11-01

The dependence of intelligent vehicles on electronic devices is rapidly increasing the concern over fault tolerance due to safety issues. For example, an x-by-wire system, such as electromechanical brake system in which rigid mechanical components are replaced with dynamically configurable elements, should be fault-tolerant because a critical failure could arise without warning. Therefore, order guarantee reliability safety-critical systems, functions have been studied detail. This paper...

10.1109/tii.2009.2020566 article EN IEEE Transactions on Industrial Informatics 2009-05-27

This paper focuses on the feasibility of fuzzy logic control for networked systems (NCSs). In order to evaluate its feasibility, a system servo motor is implemented Profibus-DP network. The NCS consists several independent, but interacting, processes running two separate stations. By using this NCS, network-induced delay analyzed find cause delay. Furthermore, controller's performance compared with that conventional proportional-integral-derivative controllers. Based experimental results, it...

10.1109/tie.2003.814761 article EN IEEE Transactions on Industrial Electronics 2003-07-29

This paper focuses on a method to integrate mobile devices such as robot, automated guided vehicle, and unmanned container transporter form an material handling system. In this paper, the stationary are connected via Profibus network while communicating IEEE 802.11 wireless LAN. order these two networks, protocol converter is developed PC platform that runs interacting processes with shared internal buffers. The performs role of translator between different protocols by converting format...

10.1109/tie.2002.1005397 article EN IEEE Transactions on Industrial Electronics 2002-06-01

As vehicles become intelligent for the convenience and safety of drivers, in-vehicle networking (IVN) systems smart modules are essential components vehicles. However, there obstacles wide acceptance modules. First, exist numerous IVN protocols that a module should be able to support. Second, whole has replaced when only sensor fails. In order overcome these obstacles, is implemented as two units; one responsible network communication other sensor/actuator operations. addition, use an...

10.1109/tie.2004.837879 article EN IEEE Transactions on Industrial Electronics 2004-11-22

There are many kinds of façade shading designs which provide optimal indoor daylighting conditions. Thus, considering combinations different types systems is an essential aspect in the optimization building design process. This study explores (1) how pattern and characteristics evaluated by varying their impact on metrics; (2) relative relationships between Daylight Autonomy (DA) Useful Illuminance (UDI) with changes types, input parameters, azimuth orientations. A typical high-school...

10.3390/en10050635 article EN cc-by Energies 2017-05-10

This paper focuses on a quality-of-service (QoS)-based remote control scheme for networked systems via the Profibus token passing protocol. Typically, experiences random network delay due to uncertainties in circulation, but protocol has in-built upper and lower bounds of delay. Thus, ensure performance protocol, should be maintained below allowable level. As is affected by parameters, such as target rotation time, we present here an algorithm selection time using genetic QoS information. We...

10.1109/tii.2005.852064 article EN IEEE Transactions on Industrial Informatics 2005-08-01

Shading design to optimize daylighting is in many cases achieved through a designer’s sense based on prior knowledge and experience. However, computer-assisted parametric techniques can be utilized for an easy much more accurate way. If such tools are the early stages of project, this effective sustainable design. This study compares conventional approach, which depends judgment create optimal indoor lighting conditions by adjusting louver shapes window patterns, with approach making use...

10.3390/su8121220 article EN Sustainability 2016-11-24

Smart home is expected to offer various intelligent services by recognizing residents along with their life style and feelings. One of the key issues for realizing smart how detect locations residents. Currently, research effort focused on two approaches: terminal-based non-terminal-based method. The method employs a type device that should be carried resident while requires no such device. This paper presents novel approach using an array pyroelectric infrared sensors (PIR sensors) can...

10.1109/sice.2006.315642 article EN 2006 SICE-ICASE International Joint Conference 2006-01-01

A stretchable pressure sensitive piezoresistive film was fabricated through the polymerization of a mixture containing an ionic liquid (IL, 1-ethyl-3-methyl-imidazolium tetrafluoroborate) and commercially available 3D printable photopolymer. This layer placed between two carbon-nanotube (CNT)-based electrodes encapsulated with top bottom insulating layers to form multilayer sensor. The intersecting create sensing unit, referred as taxel. sensor connected Wheatstone half-bridge circuit,...

10.1109/jsen.2019.2911859 article EN IEEE Sensors Journal 2019-04-25

Matrix metalloproteinases 1 (MMP-1) energetically triggers the enzymatic proteolysis of extracellular matrix collagenase (ECM), resulting in progressive skin aging. Natural flavonoids are well known for their antioxidant properties and have been evaluated inhibition metalloproteins human. Recently, (-)-epicatechin proanthocyanidin B2 were reported as essential flavanols from various natural reservoirs potential anti-inflammatory free radical scavengers. However, molecular interactions...

10.3390/biom10101379 article EN cc-by Biomolecules 2020-09-28

This study investigates the optimization of traffic scheduling in autonomous vehicle networks using time-sensitive networking (TSN), a type deterministic Ethernet. Ethernet has high bandwidth and compatibility to support various protocols, its application range is expanding from office environments smart factories, aerospace, automobiles. TSN representative technology composed standards such as time synchronization, stream reservation, seamless redundancy, frame preemption, scheduled...

10.3390/electronics13142837 article EN Electronics 2024-07-18

We show that Bieberbach's rigidity theorem for flat manifolds still holds true any continuous maps on infra-nilmanifolds.Namely, every endomorphism of an almost crystallographic group is semi-conjugate to affine endomorphism.Applying this result Fixed-point theory, we obtain a criterion the Lefschetz number and Nielsen map infra-nilmanifolds be equal.0. Infra-nilmanifolds.Let G connected Lie group.Consider semi-group Endo(G), set all endomorphisms G, under composition as operation.We form...

10.2140/pjm.1995.168.157 article EN Pacific Journal of Mathematics 1995-03-01

A possible interaction between aconitase and a mitochondrial ribosomal protein was suggested in genome-wide interactome study. In fission yeast Schizosaccharomyces pombe, the aco2(+) gene encodes fusion putative bL21 (Mrpl49). Two types of transcripts are generated via alternative poly (A) site selection, producing both single domain form. The bL21-fused Aco2 resides mitochondria as well cytosol nucleus. viability defect aco2 mutation is complemented not by but domain, which enables translation.

10.1016/j.febslet.2015.02.015 article EN FEBS Letters 2015-02-25
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