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533 results on '"Kim, Myung Joon"'

105. Transforming growth factor‐beta 1 in humidifier disinfectant‐associated children's interstitial lung disease

Author

Kim, Yoon Hee, Kim, Kyung Won, Lee, Kyung Eun, Lee, Mi‐Jung, Kim, Sang Kyum, Kim, Se Hoon, Shim, Hyo Sup, Lee, Chang Young, Kim, Myung‐Joon, Sohn, Myung Hyun, and Kim, Kyu‐Earn

Subjects
Male, Vascular Endothelial Growth Factor A, lung disease, wound healing, transforming growth factor beta1, Outcomes, Humidifiers, Humans, Chemokine CCL5, Lung, Chemokine CCL2, Inflammation, child, Interleukin-13, Interleukin-8, interstitial, Granulocyte-Macrophage Colony-Stimulating Factor, Infant, Original Articles, Lung Injury, Prognosis, Fibrosis, Matrix Metalloproteinase 9, Child, Preschool, Original Article, Female, Lung Diseases, Interstitial, Tomography, X-Ray Computed, Cell Adhesion Molecules, Disinfectants
Abstract

Summary Background Humidifier disinfectant‐associated children's interstitial lung disease has an unpredictable clinical course with a high morbidity and mortality. Objectives To evaluate the differences in clinical findings between survivors and non‐survivors of humidifier disinfectant‐associated children's interstitial lung disease. To evaluate dynamic changes in serum cytokines related to inflammation and fibrosis in lung injury, and to determine whether these changes are predictive of survival in this disease. Methods We evaluated 17 children with humidifier disinfectant‐associated children's interstitial lung disease, from whom serum samples were obtained weekly during hospitalization. The severity of chest tomographic and lung pathologic findings was scored. Levels of several cytokines were measured in the serial serum samples. Results Seven of the 17 children were survivors. Compared to survivors, non‐survivors had greater ground‐glass attenuation on follow‐up chest tomography, higher admission neutrophil counts, and more macrophages on pathologic findings. Transforming growth factor‐beta 1 persisted at an elevated level (1,000–1,500 pg/ml) in survivors, whereas it decreased abruptly in non‐survivors. At the time of this decrease, non‐survivors had clinical worsening of their respiratory failure. Transforming growth factor‐beta 1 was positively correlated with PaO2/FiO2 (r = 0.481, P

Published
2015

107. Shear wave velocity measurements using acoustic radiation force impulse in young children with normal kidneys versus hydronephrotic kidneys

Author

Sohn, Beomseok, Kim, Myung-Joon, Han, Sang Won, Im, Young Jae, and Lee, Mi-Jung

Subjects
Pathology, medicine.medical_specialty, lcsh:Medical technology, business.industry, Wave velocity, Hydronephrosis, Impulse (physics), Kidney, medicine.disease, Elasticity Imaging Techniques, Elasticity imaging techniques, lcsh:R855-855.5, Ultrasound elastography, medicine, Original Article, Radiology, Nuclear Medicine and imaging, Ultrasonography, Child, business, Acoustic radiation force, Nuclear medicine, Normal kidneys
Abstract

Purpose: To measure shear wave velocities (SWVs) by acoustic radiation force impulse (ARFI) ultrasound elastography in normal kidneys and in hydronephrotic kidneys in young children and to compare SWVs between the hydronephrosis grades. Methods: This study was approved by an institutional review board, and informed consent was obtained from the parents of all the children included. Children under the age of 24 months were prospectively enrolled. Hydronephrosis grade was evaluated on ultrasonography, and three valid ARFI measurements were attempted using a high-frequency transducer for both kidneys. Hydronephrosis was graded from 0 to 4, and high-grade hydronephrosis was defined as grades 3 and 4. Results: Fifty-one children underwent ARFI measurements, and three valid measurements for both kidneys were obtained in 96% (49/51) of the patients. Nineteen children (38.8%) had no hydronephrosis. Twenty-three children (46.9%) had unilateral hydronephrosis, and seven children (14.3%) had bilateral hydronephrosis. Seven children had ureteropelvic junction obstruction (UPJO). Median SWVs in kidneys with high-grade hydronephrosis (2.02 m/sec) were higher than those in normal kidneys (1.75 m/sec; P=0.027). However, the presence of UPJO did not influence the median SWVs in hydronephrotic kidneys (P=0.362). Conclusion: Obtaining ARFI measurements of the kidney is feasible in young children with median SWVs of 1.75 m/sec in normal kidneys. Median SWVs increased in high-grade hydronephrotic kidneys but were not different between hydronephrotic kidneys with and without UPJO.

Published
2014

113. Reply

Author

Hur, Jin, Yoon, Choon-Sik, Kim, Myung-Joon, and Kim, Ok-Hwa

Published
2007
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120. The Streaming Method using Multiple Description Coding for cluster-based server with shared-nothing storage

Author

Kim Myung-Joon, Bak Yu-Hyeon, Kim Kyong-Sok, and Kim Hag-Young

Subjects
File server, System failure, Computer science, Distributed computing, Multiple description coding, Shared nothing architecture, Load balancing (computing), Cluster based
Abstract

The cluster system with shared-nothing storage cannot escape from the problem of skewed request toward specific contents. This paper, therefore, suggests streaming method using MDC (Multiple Description Coding) instead of using single original content; this method is able to cope with skewed request in shared-nothing storage server as well as to continue to provide services in case of the system failure. Also, the system can support adaptive streaming service according to user player type, network status, the load of server, and client.

Published
2006

121. Modified Receding Horizon Guidance Law with Information on Small Accurate Time-to-Go

Author

KIM, KI BAEK, KIM, MYUNG-JOON, and CHOI, JAE WEON

Subjects
Guided missiles -- Control systems, Simulation methods -- Usage, Target acquisition -- Research, Aerospace and defense industries, Business, Computers, Electronics, Electronics and electrical industries
Abstract

A modified receding horizon guidance law (MRHG), which is useful when the accurate time-to-go is available only for a short time before the final time, is proposed. The proposed MRHG is based on the receding horizon strategy and optimal control theory. In the presence of arbitrary target maneuvers and an initial lateral miss distance (MD) rate between a target and a missile, it is shown that the proposed MRHG guarantees not i only to keep the lateral MD less than a given value, within which the warhead of the missile is detonated, from the appropriately selected time to the intercept time, but also to render the terminal MD zero. Through simulations when the time-to-go is accurate only for a short time, the performance of MRHG is compared with the optimal guidance law (OGL) and the receding horizon guidance law (RHG) in terms of the terminal MD, the lateral MD, and the missile acceleration.

Published
2000

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