Search Results - "Lee, Jaesun"

Journal Article

Evaluation of Interface Defects in Inaccessible Reactor Shrink Fit Nozzle Welds Using Ultrasonic Waves

by Lee, Jaesun Cho, Younho Published in Energies (Basel) (25.04.2017)

“...This study proposes an effective method to inspect inaccessible nuclear power reactor head nozzles using interface waves that propagate along the shrink fit...”

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Journal Article

A Study on Fatigue State Evaluation of Rail by the Use of Ultrasonic Nonlinearity

by Zhu, Bo Lee, Jaesun Published in Materials (23.08.2019)

“...Nonlinear ultrasonic testing has been accepted as a promising manner for evaluating material integrity in an early stage. Stress fatigue is the main threats to...”

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Journal Article

First-Place Loving and Last-Place Loathing: How Rank in the Distribution of Performance Affects Effort Provision

by Gill, David Kissova, Zdenka Lee, Jaesun Prowse, Victoria Published in Management science (01.02.2019)

“...Rank-order relative-performance evaluation, in which pay, promotion, symbolic awards, and educational achievement depend on the rank of individuals in the...”

Journal Article

Design and Development of Smart Semi Active Suspension for Nonlinear Rail Vehicle Vibration Reduction

by Sharma, Sunil Kumar Lee, Jaesun Published in International journal of structural stability and dynamics (01.10.2020)

“...In this paper, the semi-active suspension in railway vehicles based on the controlled magnetorheological (MR) fluid dampers is examined, and compared with the...”

Journal Article

An Application Study on Road Surface Monitoring Using DTW Based Image Processing and Ultrasonic Sensors

by Sharma, Sunil Kumar Phan, Haidang Lee, Jaesun Published in Applied sciences (29.06.2020)

“...Road surface monitoring is an essential problem in providing smooth road infrastructure to commuters. This paper proposed an efficient road surface monitoring...”

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Journal Article

Defects Inspection in Wires by Nonlinear Ultrasonic-Guided Wave Generated by Electromagnetic Sensors

by Park, Junpil Lee, Jaesun Min, Junki Cho, Younho Published in Applied sciences (28.06.2020)

“...Steel wires are widely used as raw materials for spring valves in engines. Considering the quality and safety issues of their structure, there is a demand to...”

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Journal Article

High-Precision Noncontact Guided Wave Tomographic Imaging of Plate Structures Using a DHB Algorithm

by Park, Junpil Lee, Jaesun Le, Zong Cho, Younho Published in Applied sciences (25.06.2020)

“...The safety diagnostic inspection of large plate structures, such as nuclear power plant containment liner plates and aircraft wings, is an important issue...”

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Journal Article

Rayleigh wave motions in an orthotropic half-space under time-harmonic loadings: A theoretical study

by Dao, Duy Kien Ngo, VanTrung Phan, Haidang Pham, Chi Vinh Lee, Jaesun Bui, Tinh Quoc Published in Applied mathematical modelling (01.11.2020)

“...•Reciprocity is used to obtain Rayleigh wave motions in an orthotropic half-space.•Surface waves due to a time-harmonic load are found by Fourier transform...”

Journal Article

A study on guided wave propagation in a long distance curved pipe

by Park, Junpil Lee, Jaesun Jeong, Seong-Gyun Cho, Younho Published in Journal of mechanical science and technology (01.09.2019)

“...Guided ultrasound is effective for inspecting long-range structures and inaccessible areas. Large structures such as long-distance piping contain curved tubes,...”

Journal Article

A 3-dimensional group management MAC scheme for mobile IoT devices in wireless sensor networks

by Ryoo, Intae Ryoo, Intae Sun, Kyunghee Sun, Kyunghee Lee, Jaesun Lee, Jaesun Kim, Seokhoon Kim, Seokhoon
edited by Yen, Neil Yuwen Park, Jong Hyuk
Published in Journal of ambient intelligence and humanized computing (01.08.2018)

“...We are truly entering the era of Internet of Things (IoT) in which all things are connected and can be used in a variety of ways regardless of time and place...”

Journal Article

Underground Object Classification for Urban Roads Using Instantaneous Phase Analysis of Ground-Penetrating Radar (GPR) Data

by Park, Byeongjin Kim, Jeongguk Lee, Jaesun Kang, Man-Sung An, Yun-Kyu Published in Remote sensing (Basel, Switzerland) (06.09.2018)

“...Ground-penetrating radar (GPR) has been widely used to detect subsurface objects, such as hidden cavities, buried pipes, and manholes, owing to its noncontact...”

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Journal Article

Aircraft component defect monitoring by the use of patch magnetostrictive EMAT

by Jeong, Kyoungsik Lee, Jaesun Kim, Taekyoung Cho, Younho Published in Journal of visualization (01.11.2017)

“...Health monitoring of crack initiation and growth is a major concern of aircraft inspection. The important part of health monitoring of structure is transducer...”

Journal Article

by Kim, Byung Chul Kim, Byung Chul Lee, Jaesun Lee, Jaesun Kim, Hyungki Kim, Hyungki Cheon, Sanguk Cheon, Sanguk Jun, Hongbae Jun, Hongbae Mun, Duhwan Mun, Duhwan Published in Journal of marine science and technology (01.09.2018)

“...In an offshore plant construction project, engineering, procurement, and construction (EPC) companies need to deliver plant design results to the owner in the...”

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Journal Article

A study on nondestructive evaluation technique by the use of interface guided waves on shrink fit structure

by Lee, Jaesun Cho, Younho Park, Jun-Pil Rose, Joseph L Huh, Hyung Park, Keun-Bae Kim, Dong-Ok Published in AIP conference proceedings (18.02.2014)

“...Guided wave was widely studied for plate and pipe due to the great application area. Guided wave has advantage on long distance inspection for an inaccessible...”

Journal Article

Elevated-Temperature Annealing Effects on AlGaN/GaN Heterostructures

by Ofuonye, Benedict Lee, Jaesun Yan, Minjun Fareed, Qhalid Ahmad, Iftikhar Khan, Asif Adesida, Ilesanmi Published in Journal of electronic materials (01.12.2011)

“...The effect of high-temperature annealing of undoped AlGaN/GaN heterostructures on different substrates was systematically studied between 1100°C and 1230°C. An...”

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Journal Article

The impact of post gate annealing on microwave noise performance of AlGaN/GaN HEMTs

by Liu, Dongmin Lee, Jaesun Lu, Wu Published in Solid-state electronics (01.01.2007)

“...The effects of post gate annealing on microwave noise performance of AlGaN/GaN HEMTs on SiC substrate were investigated. The results show that post Schottky...”

Journal Article

Passivation of Surface and Interface States in AlGaN/GaN HEMT Structures by Annealing

by Kim, Hyeongnam Schuette, Michael L Lee, Jaesun Lu, Wu Mabon, James C Published in Journal of electronic materials (01.09.2007)

“...The Ni/AlGaN interfaces in AlGaN/GaN Schottky diodes were investigated to explore the physical origin of post-annealing effects using electron beam induced...”

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Journal Article

Using Lamb Waves to Monitor Moisture Absorption in Thermally Fatigued Composite Laminates

by Jaesun Lee Younho Cho Published in 비파괴검사학회지 (2016)

“...Nondestructive evaluation for material health monitoring is important in aerospace industries. Composite laminates are exposed to heat cyclic loading and humid...”

Journal Article

Use of the reciprocity theorem for a closed form solution of scattering of the lowest axially symmetric torsional wave mode by a defect in a pipe

by Lee, Jaesun Achenbach, Jan D Cho, Younho Published in Ultrasonics (01.03.2018)

“...•The scattering of the lowest torsional mode is analyzed by the reciprocity theorem.•The solution of wave scattering amplitude ratio is presented in simple...”

Journal Article

Influence of annealed ohmic contact metals on polarisation of AlGaN barrier layer

by Zhaojun Lin Wu Lu Jaesun Lee Dongmin Liu J S Flynn G R Brandes Published in Electronics letters (18.09.2003)

“... The influence of annealed ohmic contact metals on the polarisation of the AlGaN barrier layer has been investigated by the Schottky contacts on the AlGaN/GaN...”

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