So Yeon Lee, Hee Jin Park, Hyon Joo Kwag, Hyun‐Pyo Hong, Hae-Won Park, Yong-Rae Lee, Kyung Jae Yoon, Yong‐Taek Lee,
The purpose of this study was to investigate whether ultrasound (US) elastography is useful for the early diagnosis of plantar fasciitis.We retrospectively reviewed US elastography findings of 18 feet with a clinical history and physical examination highly suggestive of plantar fasciitis but with normal findings on conventional US imaging as well as 18 asymptomatic feet.Softening of the plantar fascia was significantly greater in the patient than in the control group [Reviewers 1 and 2: 89% (16/18) ...
Tópico(s): Streptococcal Infections and Treatments
2014 - Elsevier BV | Clinical Imaging
Yong-Rae Lee, Hyun-Joon Kang, Mun-Kyeom Kim,
Photovoltaic (PV) energy generation in microgrids (MGs) is increasing. Battery energy storage systems (BESSs) reduce the fluctuations in PV outputs caused by the intermittent availability of solar energy. Although BESSs are advantageous for stable MG operation, they are still relatively expensive. By remaining within the operational limits during normal and contingency operation, optimal sizing of BESS is required to maintain security considering cost of MG system. This paper proposes a BESS sizing ...
Tópico(s): Electric Vehicles and Infrastructure
2022 - Institute of Electrical and Electronics Engineers | IEEE Access
Yong-Rae Lee, Hyung Joon Kim, Mun-Kyeom Kim,
As renewable penetration increases in microgrids (MGs), the use of battery energy storage systems (BESSs) has become indispensable for optimal MG operation. Although BESSs are advantageous for economic and stable MG operation, their life degradation should be considered for maximizing cost savings. This paper proposes an optimal BESS scheduling for MGs to solve the stochastic unit commitment problem, considering the uncertainties in renewables and load. Through the proposed BESS scheduling, the life ...
Tópico(s): Smart Grid Energy Management
2021 - Multidisciplinary Digital Publishing Institute | Energies
Tae-Eun Chung, Yong-Rae Lee, Chang-Soo Kim, Han-Sung Kim,
Tópico(s): High-Velocity Impact and Material Behavior
1996 - | SAE technical papers on CD-ROM/SAE technical paper series
Yoo-Jin Jeon, Jin-Seok Lee, Yong-Rae Cho, Sung Bae Lee, Won Young Kim, Seong‐Soo Roh, Jin‐Yong Joung, Hwa- Dong Lee, Sung-Ok Moon, Jung‐Hyo Cho, Chang‐Gue Son,
Banha-sasim-tang (BST; Hange-shashin-to in Kampo medicine; Banxia xiexin tang in traditional Chinese medicine) is a traditional Chinese harbal medicine that has been commonly used for gastrointestinal disorders. To investigate the pharmacological effects of BST, a standardized herbal drug, on main symptoms of functional dyspepsia including delayed gastric emptying, and underlying mechanisms of action in mouse model. Balb/C mice were pretreated with BST (25, 50, 100 mg/kg, po) or mosapride (3 mg/kg, ...
Tópico(s): Whipple's Disease and Interleukins
2019 - Elsevier BV | Journal of Ethnopharmacology
Chang-Soo Kim, Yong-Rae Lee, Tae-Eun Chung, Young-Joon Song, Shin-You King, E C Chirwa,
Abstract In this paper the bending collapse characteristics of steel square and rectangular steel tubes are studied using a test machine which applies pure bending moment without imposing shear and tensile forces. Under pure bending moment, delayed buckling modes occur and dependent on the deformation test length and shape of section. For delayed mode, the strain energy absorbed through bending of the tubes is also verified by finite element analysis. Overall, the theory developed here shows the ...
Tópico(s): Mechanical Behavior of Composites
1997 - Taylor & Francis | International Journal of Crashworthiness
Jung‐Hoon Kim, Min Seuk Kim, Hong‐Geun Oh, Hak-Yong Lee, Jeong‐Woo Park, Bong Gun Lee, Sang‐Hoon Park, Dae-In Moon, Eun-Hye Shin, Eun-kyeong Oh, Munkhsoyol Erkhembaatar, Okjin Kim, Yong-Rae Lee, Han‐Jung Chae,
It has been generally accepted that calcium intake prevents bone loss, and frequent fracture resulted from osteoporosis. However, it is still elusive as to how effective sole calcium intake is in preventing or attenuating the severity of osteoporosis. Here, we demonstrate the effects of eggshell-casein phosphopeptide (ES-CPP), and compared these effects those of calcium supplement, for restoring ovariectomy-mediated bone loss. CPP, synthesized from the hydrolysis of casein (0.5%) using trypsin, was ...
Tópico(s): Vitamin D Research Studies
2013 - BioMed Central | Laboratory Animal Research
Hyeon-Muk Oh, Jin‐Seok Lee, Seo-Woo Kim, Young-Taeck Oh, Wonyong Kim, Sung Bae Lee, Yong-Rae Cho, Yoo-Jin Jeon, Jung‐Hyo Cho, Chang‐Gue Son,
Uwhangchungsimwon (UCW) is one of the most representative standardized herbal drugs for the treatment of central nervous system diseases, including mood disorders, and has been used for over 600 years in Korea and China. In spite of the long clinical application of UCW, no experimental evidence for its use against depressive disorders exists. Here, we performed an animal study to investigate the anti-depressive effect of UCW and the underlying mechanisms.A social isolation-induced depressive-like ...
Tópico(s): Tryptophan and brain disorders
2020 - Frontiers Media | Frontiers in Pharmacology
Seong-Woo Hong, Jiyoung Yoon, Seong-Hwan Kim, Sun-Kon Lee, Yong–Rae Kim, Yu‐Jin Park, Gi‐Woo Kim, Seung‐Bok Choi,
In this study, a soft structure with its stiffness tunable by an external field is proposed. The proposed soft beam structure consists of a skin structure with channels filled with a magnetorheological fluid (MRF). Two specimens of the soft structure are fabricated by three-dimensional printing and fused deposition modeling. In the fabrication, a nozzle is used to obtain channels in the skin of the thermoplastic polyurethane, while another nozzle is used to fill MRF in the channels. The specimens ...
Tópico(s): Polymer composites and self-healing
2019 - Multidisciplinary Digital Publishing Institute | Micromachines
Sun Kon Lee, Yong Rae Kim, Su Hyun Kim, Joo Hyung Kim,
Tópico(s): Manufacturing Process and Optimization
2018 - Korean Society of Manufacturing Process Engineers | Journal of the Korean Society of Manufacturing Process Engineers
Seung-Jun Hong, Yong-Rae Lee, Young-Joon Song, Tae-Eun Chung, Byoung-Kee Han,
Abstract This paper presents results of quasi-static and dynamic axial collapse tests on extruded 6061T6, 6063T6, 6005A thick aluminum prismatic tubes. The force-shortening curves from experiments are compared with those calculated using explicit code and CRASH CAD. The estimate of the maximum crippling force is expressed as a function of section geometry and material property by using dimensional analysis. The approximate results of dimensional analysis are in good agreement with the experiments.
Tópico(s): Mechanical Behavior of Composites
1998 - Taylor & Francis | International Journal of Crashworthiness
Yong Rae Hong, Hyun Tae Kim, Seung‐Chul Lee, Seonggu Ro, Joong Myung Cho, In Su Kim, Young Hoon Jung,
A new series of PHD (HIF prolyl 4-hydroxylase) inhibitors was designed based on the X-ray co-crystal structure of FG-2216. Using a lead generation process, a series of [(4-Hydroxyl-benzo[4,5]thieno[3,2-c]pyridine-3-carbonyl)-amino]-acetic acid derivatives was developed as potent PHD2 inhibitors. This class of compounds also showed the ability to stabilize HIF-α, to stimulate EPO secretion in in vitro studies, and to increase hematocrit, red blood cell count, and hemoglobin levels in an animal efficacy ...
Tópico(s): Metabolomics and Mass Spectrometry Studies
2013 - Elsevier BV | Bioorganic & Medicinal Chemistry Letters
Tae-Eun Chung, Yong-Rae Lee, Chang-Soo Kim,
Tópico(s): Structural Analysis and Optimization
1995 - | SAE technical papers on CD-ROM/SAE technical paper series
Woojin Lee, Sung Deok, Yong Rae Kwon,
It is well known that requirements engineering plays a critical role in software quality. The use case approach is a requirements elicitation technique commonly used in industrial applications. Software requirements are stated as a collection of use cases, each of which is written in the user's perspective and describes a specific flow of events in the system. The use case approach offers several practical advantages in that use case requirements are relatively easy to describe, understand, and ...
Tópico(s): Model-Driven Software Engineering Techniques
1998 - IEEE Computer Society | IEEE Transactions on Software Engineering
Yong Rae Hong, Hyun Tae Kim, Seonggu Ro, Joong Myung Cho, Sang Hwi Lee, In Su Kim, Young Hoon Jung,
The design, synthesis, and capacity to inhibit HIF prolyl 4-hydroxylases (PHDs) are described for 2-[2-(3-hydroxy-pyridin-2-yl)-thiazol-4-yl]-acetamide analogs. These analogs revealed two kinds of novel scaffolds as PHD2 inhibitors. Synthetic routes were developed for the preparation of their analogs containing the new scaffolds. In addition, the structure-activity relationship (SAR) of the 2-[2-(3-hydroxy-pyridin-2-yl)-thiazol-4-yl]-acetamide derivatives and their biological activities were reported. ...
Tópico(s): ATP Synthase and ATPases Research
2014 - Elsevier BV | Bioorganic & Medicinal Chemistry Letters
Yong-Rae Lee, Hyung Joon Kim, Mun-Kyeom Kim,
In the original publication [...]
Tópico(s): Electric Vehicles and Infrastructure
2022 - Multidisciplinary Digital Publishing Institute | Energies
Sung‐Rae Cho, Yong Rae Kim, Hoi-Sung Kang, Sun Hee Yim, Chang-il Park, Yoo Hong Min, Bae Hwan Lee, Ji Cheol Shin, Jong‐Baeck Lim,
This study was designed to investigate functional recovery after the transplantation of mesenchymal stem cells (MSCs) or neurally differentiated MSCs (NMSCs) derived from bone marrow in a rat model of spinal cord injury (SCI). Sprague-Dawley rats were subjected to incomplete SCI using an NYU impactor to create a free drop contusion at the T9 level. The SCI rats were then classified into three groups; MSCs, NMSCs, and phosphate-buffered saline (PBS)-treated groups. The cells or PBS were administrated ...
Tópico(s): Nerve injury and regeneration
2016 - SAGE Publishing | Cell Transplantation
Sung‐Rae Cho, Yong Rae Kim, Hoi-Sung Kang, Sun Hee Yim, Chang-il Park, Yoo Hong Min, Bae Hwan Lee, Ji Cheol Shin, Jong‐Baeck Lim,
This study was designed to investigate functional recovery after the transplantation of mesenchymal stem cells (MSCs) or neurally differentiated MSCs (NMSCs) derived from bone marrow in a rat model of spinal cord injury (SCI). Sprague-Dawley rats were subjected to incomplete SCI using an NYU impactor to create a free drop contusion at the T9 level. The SCI rats were then classified into three groups; MSCs, NMSCs, and phosphate-buffered saline (PBS)-treated groups. The cells or PBS were administrated ...
Tópico(s): Nerve injury and regeneration
2009 - SAGE Publishing | Cell Transplantation
Seung Hoon Lee, Hyeon‐Don Kim, Hyunjoo Choi, Byungsoo Kang, Yong Rae Cho, Bumki Min,
Single-layer graphene absorbs a small fraction of incident terahertz waves by intraband transition of Dirac fermions. The amounts of absorption, reflection, and transmission of terahertz waves depend on the doping level of graphene, i.e., the Fermi level, and they exhibit relatively weak frequency dependency at terahertz frequencies. By hybridizing gated single-layer graphene with a non-resonant meta-atom structure, we show that the effective surface conductivity of meta-atom hybridized graphene ...
Tópico(s): Topological Materials and Phenomena
2013 - IEEE Microwave Theory and Techniques Society | IEEE Transactions on Terahertz Science and Technology
Suk‐Hee Lee, Gigon Bae, Heung Seok Chae, Doo‐Hwan Bae, Yong Rae Kwon,
Abstract Refactoring is a widely accepted technique to improve the software quality by restructuring its design without changing its behavior. In general, a sequence of refactorings needs to be applied until the quality of the code is improved satisfactorily. In this case, the final design after refactoring can vary with the application order of refactorings, thereby producing different quality improvements. Therefore, it is necessary to determine a proper refactoring schedule to obtain as many ...
Tópico(s): Software Engineering Techniques and Practices
2010 - Wiley | Software Practice and Experience
Sun Kon Lee, Yong Rae Kim, Tae Jung Yoo, Ji Hye Park, Joo Hyung Kim,
Tópico(s): 3D Printing in Biomedical Research
2018 - Korean Society of Manufacturing Process Engineers | Journal of the Korean Society of Manufacturing Process Engineers
Yong-Rae Hong, Jeong Yong Lee, Kyungkon Kim, Jung-Il Jin, Cheol Jin Lee, Hoo Min Lee, Yongsup Park, Byung-Hee Shon, Jae-Kun Park,
New poly(p-phenylenevinylene) (PPV) derivatives (polymer 1 and 2) that carry hole-transporting carbazole and electron-transporting phenyloxadiazole pendants were synthesized and their photo- and electroluminescence properties were studied. Polymer 1 is poly[2-(N-carbazolyl)-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] that has both carbazole and 2-ethylhexyl pendant groups. And polymer 2 is poly[2-{4-[5-(4-t-butylphenyl)-1,3,4-oxadiazolyl]phenyl}-5-(2-ethylhexyloxy)-1,4-phenylenevinylene], which bears ...
Tópico(s): Organic Light-Emitting Diodes Research
2001 - Wiley | Macromolecular Symposia
Lee Kyeong Cheol, Kun-Woo Chun, Suk–Woo Kim, Ju-Ung Yun, Kim Yong Rae, Changwoo Lee, Dong-Jin Seo, Han Sang-Kyun,
Tópico(s): Biocrusts and Microbial Ecology
2019 - | Journal of Agriculture & Life Science
Ga Young Park, Cheoul‐Hong Park, Sang Kwang Lee, Chun Young Im, Soong‐Hyun Kim, Hee-Jong Hwang, Jieon Lee, Tae‐Ho Lee, Yong Rae Hong, Minsoo Song,
Abstract Derivatives of 4‐hydroxy‐1‐alkyl‐2‐oxo‐1,2‐dihydrothieno[2,3‐b:4,5‐b′]dipyridine‐3‐carbonylglycine were developed as a novel hypoxia‐inducible factor prolyl hydroxylase domain (PHD) inhibitor. The chemical space of the tricyclic 4‐hydroxypyridinyl glycines was examined thoroughly during our optimization study. One of our most potent compounds 12ar exhibits superior enzymatic activity to the known PHD inhibitors that are in the late stage of clinical studies. The functional efficacy of our ...
Tópico(s): High Altitude and Hypoxia
2023 - Wiley | Bulletin of the Korean Chemical Society
Ji-Min Hwa, Suk Hee Lee, Yong‐Rae Kwon,
The coupling measurements of object oriented programs can be valuable information for various maintenance tasks and there exists a variety of metrics proposed by numerous researchers. Those metrics, however, cannot measure the strength of dependencies between classes, but only imply the existence of dependencies. Hence they are of limited value for assisting maintenance tasks such as refactoring and system decomposition, which requires information about the strength of dependency. In this paper, ...
Tópico(s): Advanced Software Engineering Methodologies
2008 - | Jeongbo gwahaghoe nonmunji. keompyuting ui silje
Sungil Jang, Bo-Hwa Jeong, Young-Geun Kim, Su-Bin Lee, Yong-Rae Cho, Sung‐Hae Park, Jin-Kook Lee, Mi‐Ra Kim,
The dye-sensitized solar cells (DSSCs) examine long-term stability tests were prepared to SnO2:F (FTO) glass substrates patterned by the etching method were applied to the electrode on the device using polyethyleneglycol (PEG) electrolyte. We investigated the effect of patterned SnO2:F (FTO) glass substrates on the power conversion efficiency and long-term stability of DSSCs. The patterned devices maintained over 83% of its initial overall power conversion efficiency after 720 hours aging at room temperature, ...
Tópico(s): Advanced Photocatalysis Techniques
2008 - Taylor & Francis | Molecular Crystals and Liquid Crystals
Due to problems such as fossil fuel depletion and climate change, research on microgrids is being actively conducted. Among them, the urban power network, in which multiple microgrids are connected, is regarded as the future power grid. However, these urban power network systems ensure that the output of renewable power is uncertain according to weather factors, and that the characteristics of intermittent are present as a risk in power network stability. This study analyzed the stability according ...
Tópico(s): Optimal Power Flow Distribution
2022 - Korean Institute of Electrical Engineers | The Transactions of The Korean Institute of Electrical Engineers
Ho-Sung Ryu, Yong-Rae Lee, Mun-Kyeom Kim,
Low uncertainty is essential when operating the power system in a stable state. Recently, the uncertainty in the power systems has increased due to the growth of renewable energy. This paper proposes a method to reduce the uncertainty of the power systems including renewable energy by using Long Short-term Memory (LSTM) algorithm. Through repeated simulation, the optimal LSTM model of each renewable unit is created. probabilistic scenario is created by monte-carlo simulation and k-means clustering ...
Tópico(s): Integrated Energy Systems Optimization
2020 - Korean Institute of Electrical Engineers | The Transactions of The Korean Institute of Electrical Engineers
Yong-Rae Lee, Eu-Teum Choi, Yong-Kee Jun,
항공기 시현계통은 항공기 운영에 필요한 다양한 정보를 통합하여 조종사에게 시현한다. 시현계통에서 소프트웨어 결함이 발생되면 정확하지 않은 정보가 조종사에게 시현될 수 있기 때문에 항공기의 운영에 심각한 영향을 미칠 수 있다. 따라서 시현계통의 개발 중에 지상시험과 비행시험을 통해 발생 가능한 소프트웨어 결함을 식별하고 제거하려고 노력하고 있다. 본 연구는 비행시험 자료를 이용하여 시현계통의 소프트웨어 결함 분석을 지원하는 도구인 FDR(Flight Data Replay)을 제시한다. 이 도구는 항공기 임무컴퓨터와 연동되어 실시간으로 동작한다. 그리고 시현소프트웨어에 비행시험 자료를 적용하여 시현장치에 나타나는 기능적인 오류상황을 재현한다.
Tópico(s): Simulation and Modeling Applications
2018 - Korean Society for Aeronautical and Space Science | Journal of the Korean Society for Aeronautical & Space Sciences
Kyou Sup Han, Myung Hee Park, Yoo Sung Hwang, Yong Rae Lee, Sang In Kim,
Tópico(s): Hepatitis B Virus Studies
1997 - | The Korean Journal of Blood Transfusion