22 results on '"Jong Hyun Jeon"'
Search Results
2. Experimental and Molecular Dynamics Studies on Tensile Properties of Nylon 6/Graphene Composite Filaments
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Tae Hwan Oh, Dong Soo Shin, Yeongmin Im, Youngho Seo, A. J. Nathanael, Young Jin Kim, Jong Hyun Jeon, Ki Hyun Kim, Jae-Hun Jung, and Ik Sung Choi
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Polymers and Plastics ,General Chemical Engineering ,General Chemistry - Published
- 2022
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3. Anti-N-methyl-D-aspartate receptor encephalitis after coronavirus disease 2019: A case report and literature review
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Hyesun Lee, Jong Hyun Jeon, Hojin Choi, Seong-Ho Koh, Kyu-Yong Lee, Young Joo Lee, and Hyuk Sung Kwon
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Adult ,Anti-N-Methyl-D-Aspartate Receptor Encephalitis ,Young Adult ,COVID-19 ,Humans ,Immunoglobulins ,Female ,General Medicine ,Methylprednisolone ,Receptors, N-Methyl-D-Aspartate - Abstract
Coronavirus disease 2019 (COVID-19) has become a global pandemic and COVID-19-associated anti-N-methyl-D-aspartate receptor (NMDAR) encephalitis may occur through an immune-mediated pathomechanism.A 21-year-old woman with a history of COVID-19 presented to our hospital with memory decline and psychiatric symptoms.The patient was diagnosed with anti-NMDAR encephalitis.Intravenous methylprednisolone (1 g/day over 5 days) followed by immunoglobulin (0.4 g/kg/day over 5 days) were administered. The patient underwent laparoscopic salpingo-oophorectomy to remove an ovarian teratoma.The patient was discharged with sequelae of short-term memory impairment, without other neuropsychiatric symptoms.Cases of previously reported anti-NMDAR encephalitis with COVID-19 were reviewed and compared with the present case. Clinicians should be aware of the occurrence of anti-NMDAR encephalitis in patients who present with neuropsychiatric complaints during or after exposure to COVID-19. Further studies are required to determine the causal relationship between the 2 diseases and predict the prognosis of anti-NMDAR encephalitis after COVID-19 exposure.
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- 2022
4. Multi-axis shoulder abduction splint in acute burn rehabilitation: a randomized controlled pilot trial
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Ji Soo Choi, Jong Hyeon Kim, Cheong Hoon Seo, Ki Un Jang, Jong Hyun Jeon, and Jeong Hyeon Mun
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Adult ,Male ,Shoulder ,medicine.medical_specialty ,Contracture ,Multi axis ,medicine.medical_treatment ,Pilot Projects ,Physical Therapy, Sports Therapy and Rehabilitation ,medicine ,Humans ,Range of Motion, Articular ,Rehabilitation ,business.industry ,Pilot trial ,Equipment Design ,Middle Aged ,medicine.anatomical_structure ,Splints ,Shoulder abduction ,Axilla ,Physical therapy ,Female ,Shoulder joint ,medicine.symptom ,Burns ,Splint (medicine) ,Range of motion ,business - Abstract
Objective: The traditional thermoplastic aeroplane splint for axillary burn contracture is heavy, uncomfortable, and time consuming and difficult to put on and off. The present study tested the effectiveness of a newly designed multi-axis shoulder abduction splint with an easy-to-change angle. Design: Randomized controlled parallel assessor blinded pilot. Setting: Inpatient rehabilitation center in a general hospital. Subjects: Twenty-four patients with recent (< 30 days) burns around the shoulder joint were randomized into two groups. After two dropouts, 11 patients used the new splint for four weeks and 13 patient were left unsplinted for four weeks. Interventions: The newly designed multi-axis shoulder abduction splint keeps the shoulder abducted at the highest possible angle. Main outcomes: The range of motion of the shoulder joint was measured at 0, 1, 2, 3, and 4 weeks. Active abduction, flexion, and external rotation were measured according to the zero position method by placing the axis of the goniometer ventral to the shoulder joint. Results: Repeated-measure ANOVA revealed that the splint group developed significantly better abduction ( P = 0.020) and flexion ( P = 0.036) over 4 weeks than the non-splint group. ANCOVA using the initial (0 week) angle and Shoulder Burn Depth Index as covariates revealed that the splint group had significantly better abduction than the non-splint group ( P = 0.013). Conclusion: The new multi-axis shoulder abduction splint resulted in a significant improvement in shoulder abduction angle compared to unsplinted patients.
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- 2014
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5. Stereo Matching Method using Directional Feature Vector
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Jong-Hyun Jeon, Chul-Soo Ye, and Chang-Gi Moon
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Matching (statistics) ,Pixel ,business.industry ,Template matching ,Feature vector ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,Pattern recognition ,Interval (mathematics) ,Geography ,Feature (computer vision) ,Computer Science::Computer Vision and Pattern Recognition ,Range (statistics) ,Computer vision ,Artificial intelligence ,business ,Second derivative - Abstract
In this paper we proposed multi-directional matching windows combined by multi-dimensional feature vector matching, which uses not only intensity values but also multiple feature values, such as variance, first and second derivative of pixels. Multi-dimensional feature vector matching has the advantage of compensating the drawbacks of area-based stereo matching using one feature value, such as intensity. We define matching cost of a pixel by the minimum value among eight multi-dimensional feature vector distances of the pixels expanded in eight directions having the interval of 45 degrees. As best stereo matches, we determine the two points with the minimum matching cost within the disparity range. In the experiment we used aerial imagery and IKONOS satellite imagery and obtained more accurate matching results than that of conventional matching method.
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- 2007
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6. Improvement of the Light Extraction Efficiency of InGaN/GaN Blue Light Emitting Diodes Using ZnO Nanostructures
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Seung Jong Oh, Ja-Yeon Kim, Pan-Ju Choi, Jong-Hyun Jeon, Min-Ki Kwon, and Youngjin Kang
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Materials science ,Nanostructure ,business.industry ,Extraction (chemistry) ,Biomedical Engineering ,Finite-difference time-domain method ,Bioengineering ,General Chemistry ,Condensed Matter Physics ,law.invention ,law ,Optoelectronics ,General Materials Science ,Nanorod ,business ,Light-emitting diode ,Diode ,Blue light - Abstract
Herein, we report the effects of geometric morphology of ZnO nanostructures on the extraction efficiency of GaN-based light emitting diodes (LEDs). We performed numerical analysis based on the two-dimensional (2D) finite difference of time domain (FDTD) method that was utilized to calculate the light extraction efficiency of the LEDs. We found that the extraction efficiency of the LED increased upon changing the shape of ZnO nanostructure from nanorods to pencil-likenanorods. The current-voltage characteristics of the LED with ZnO nanorods or pencil-like nanorods were similar to those of the LED that did not contain any ZnO nanostructures. The light output power of the LEDs containing ZnO nanorods or pencil-like nanorods at 100 mA increased additionally to 28% and 39%, respectively, relative to that of the LED that did not contain any ZnO nanostructures. These results confirm that the geometric morphology of the ZnO nanostructure plays an important role in improving the extraction efficiency of the LEDs.
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- 2015
7. Indium Tin Oxide-Free Transparent Conductive Electrode for GaN-Based Ultraviolet Light-Emitting Diodes
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Jong-Hyun Jeon, Min-Ki Kwon, and Ja-Yeon Kim
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Materials science ,business.industry ,engineering.material ,medicine.disease_cause ,law.invention ,Indium tin oxide ,Coating ,law ,Electrode ,medicine ,engineering ,Optoelectronics ,General Materials Science ,business ,Sheet resistance ,Ultraviolet ,Transparent conducting film ,Diode ,Light-emitting diode - Abstract
Transparent conducting electrodes are important components of highly efficient ultraviolet light-emitting diodes (UV LEDs). Indium tin oxide (ITO) is commonly used to form a current spreading layer, but its UV-range optical transparency is limited with a low sheet resistance. We demonstrate a simple solution-based coating technique to obtain large-area, highly uniform, and conductive silver-nanowire-based electrodes that exhibit UV-range optical transparency better than that of ITO for the same sheet resistance. The UV LEDs fabricated using this current spreading layer showed improved optical power emission as well as improvement in electrical properties.
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- 2015
8. Meniscal Extrusions on a Non-Traumatic and Young Knee: Magnetic Resonance Imaging Study
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Tae-Seok Nam, Yi Rak Seo, Jae Chun Sim, Daewon Park, and Jong-Hyun Jeon
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030203 arthritis & rheumatology ,030222 orthopedics ,03 medical and health sciences ,0302 clinical medicine ,medicine.diagnostic_test ,business.industry ,Non traumatic ,medicine ,Magnetic resonance imaging ,Nuclear medicine ,business - Published
- 2018
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9. Surgical Techniques for Percutaneous Intramedullary Fixation with Steinmann Pins for Clavicle Shaft Fractures
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Jae Chun Sim, Min Chul Sung, Sung Sik Ha, Jong Hyun Jeon, and Yi Rak Seo
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Intramedullary rod ,medicine.medical_specialty ,Fixation (surgical) ,medicine.anatomical_structure ,Percutaneous ,Clavicle ,law ,business.industry ,medicine ,business ,Surgery ,law.invention - Published
- 2017
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10. The effect of burn rehabilitation massage therapy on hypertrophic scar after burn: a randomized controlled trial
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Aram Hong, Jong H. Kim, Yong Suk Cho, Jong Hyun Jeon, Yoon Soo Cho, Cheong Hoon Seo, Dohern Kim, Hyeong Tae Yang, Haejun Yim, Boung Chul Lee, Jun Hur, and Wook Chun
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Adult ,Male ,medicine.medical_specialty ,Erythema ,Cicatrix, Hypertrophic ,Visual analogue scale ,medicine.medical_treatment ,Distension ,Critical Care and Intensive Care Medicine ,law.invention ,Hypertrophic scar ,Randomized controlled trial ,law ,Medicine ,Humans ,Single-Blind Method ,Pain Measurement ,Skin ,Ultrasonography ,Massage ,Rehabilitation ,integumentary system ,business.industry ,Pruritus ,General Medicine ,Middle Aged ,medicine.disease ,Elasticity ,Surgery ,Treatment Outcome ,Emergency Medicine ,Itching ,Female ,medicine.symptom ,business ,Burns - Abstract
a b s t r a c t Objective: To evaluate the effect of burn rehabilitation massage therapy on hypertrophic scar after burn. Method: One hundred and forty-six burn patients with hypertrophic scar(s) were randomly divided into an experimental group and a control group. All patients received standard rehabilitation therapy for hypertrophic scars and 76 patients (massage group) additionally received burn scar rehabilitation massage therapy. Both before and after the treatment, we determined the scores of visual analog scale (VAS) and itching scale and assessed the scar characteristics of thickness, melanin, erythema, transepidermal water loss (TEWL), sebum, and elasticity by using ultrasonography, Mexameter 1 , Tewameter 1 , Sebumeter 1 , and Cutometer 1 , respectively. Results: The scores of both VAS and itching scale decreased significantly in both groups, indicating a significant intragroup difference. With regard to the scar characteristics, the massage group showed a significant decrease after treatment in scar thickness, melanin, erythema, TEWL and a significant intergroup difference. In terms of scar elasticity, a significant intergroup difference was noted in immediate distension and gross skin elasticity, while the massage group significant improvement in skin distensibility, immediate distension, immediate retraction, and delayed distension. Conclusion: Our results suggest that burn rehabilitation massage therapy is effective in improving pain, pruritus, and scar characteristics in hypertrophic scars after burn.
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- 2013
11. The effect of extracorporeal shock wave therapy on myofascial pain syndrome
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Ki Un Jang, Jong Hyun Jeon, Ju Youn Lee, Won Yong Park, Ji Soo Choi, Cheong Hoon Seo, Jeong Hyeon Mun, and Yun Jae Jung
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congenital, hereditary, and neonatal diseases and abnormalities ,medicine.medical_specialty ,Extracorporeal shock wave therapy ,Trigger points ,business.industry ,Rehabilitation ,nutritional and metabolic diseases ,High-Energy Shock Waves ,Myofascial pain syndrome ,medicine.disease ,Myofascial pain syndromes ,Pain threshold ,Threshold of pain ,Physical therapy ,medicine ,High-energy shock waves ,Original Article ,skin and connective tissue diseases ,business - Abstract
Objective To investigate the effect of extracorporeal shock wave therapy (ESWT) on myofascial pain syndrome (MPS). Method Thirty patients with MPS in trapezius muscle were randomly divided into two groups, ESWT group (n=15), and trigger point injections (TPI)+transcutaneous electrical nerve stimulation (TENS) group (n=15). For a total of 3 weeks, ESWT was undertaken with 1,500 pulse each time at one week interval totaling 4,500 pulse, TPI for once a week totaling three times and TENS for five times a week totaling three weeks. Results The changes in pain threshold (lb/cm2) showed the values of 6.86±1.35 before first therapy, 11.43±0.27 after first therapy, and 12.57±0.72 after third therapy, while TPI+TENS group showed the values of 6.20±1.92 before first therapy, 8.80±0.48 after first therapy, and 9.60±2.19 after third therapy, and the changes between the groups were significantly different (p=0.045). The changes in visual analog scale were estimated to be 6.86±0.90 before first therapy, 2.86±0.90 after first therapy, and 1.86±0.69 after third therapy in case of ESWT group, whereas the figures were estimated to be 7.20±1.30 before first therapy, 4.60±0.55 after first therapy, and 2.80±0.84 after third therapy in case of TPI+TENS group, and the changes between the groups were significantly different (p=0.010). The changes in McGill pain questionnaire (p=0.816) and pain rating scale (p=0.644) between the groups were not significantly different. The changes in neck ROM were also not significantly different between the groups (p>0.05). Conclusion The ESWT in patients with MPS in trapezius muscle are as effective as TPI and TENS for the purpose of pain relief and improving cervical range of motion.
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- 2012
12. The factors associated with contact burns from therapeutic modalities
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Yong Suk Cho, Jong-Hyun Jeon, Jeong-Hyeon Mun, Dohern Kim, Jong Hyun Kim, Cheong Hoon Seo, Wook Chun, Hae Jun Lim, Jun Hur, Hyeong Tae Yang, Yun Jae Jung, and Ki-Un Jang
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Pathology ,medicine.medical_specialty ,genetic structures ,business.industry ,Physical therapy modalities ,Rehabilitation ,Alternative medicine ,Therapeutic modalities ,Diabetes mellitus ,otorhinolaryngologic diseases ,Physical modalities ,Medicine ,Original Article ,business ,Intensive care medicine ,Burns ,psychological phenomena and processes - Abstract
Objective To understand the injury pattern of contact burns from therapeutic physical modalities. Method A retrospective study was done in 864 patients with contact burns who discharged from our hospital from January 2005 to December 2008. The following parameters were compared between patients with contact burns from therapeutic modalities and from other causes: general characteristics, burn extent, cause of burn injury, place of occurrence, burn injury site, treatment methods, prevalence of underlying disease, and length of hospital stay were compared between patients with contact burns. Results Of the 864 subjects, 94 patients were injured from therapeutic modalities. A hot pack (n=51) was the most common type of therapeutic modality causing contact burn followed by moxibustion (n=21), electric heating pad (n=16), and radiant heat (n=4). The lower leg (n=31) was the most common injury site followed by the foot & ankle (n=24), buttock & coccyx (n=9), knee (n=8), trunk (n=8), back (n=6), shoulder (n=4), and arm (n=4). Diabetes mellitus was associated with contact burns from therapeutic modalities; the odds ratio was 3.99. Injuries took place most commonly at home (n=56), followed by the hospital (n=33), and in other places (n=5). Conclusion A hot pack was the most common cause of contact burns from therapeutic modalities, and the lower leg was the most common injury site. Injuries took place most commonly at home. The patients with contact burns from therapeutic modalities showed high correlation to presence of diabetes mellitus. These results would be helpful for the prevention of contact burns due to therapeutic modalities.
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- 2012
13. ChemInform Abstract: Synthesis of a New Fluorescent Small Molecule Probe and Its Use for in vivo Lipid Imaging
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Jong Hyun Jeon, Jae Hong Lee, Young-Tae Chang, Jin Hee Ahn, Juhoon So, Myung Ae Bae, Cheol-Hee Kim, Yu-Ri Lee, and Eun Bok Choi
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animal structures ,biology ,In vivo ,Chemistry ,Cell culture ,Lipid droplet ,Biophysics ,General Medicine ,biology.organism_classification ,Small molecule ,Fluorescence ,Zebrafish ,eye diseases - Abstract
The compound (III), named LipidGreen, stains lipid droplets in 3T3L1 pre-adipocyte cell lines and fat deposits in zebrafish.
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- 2011
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14. Synthesis of a new fluorescent small molecule probe and its use for in vivo lipid imaging
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Cheol-Hee Kim, Juhoon So, Jae Hong Lee, Young-Tae Chang, Eun Bok Choi, Jin Hee Ahn, Jong Hyun Jeon, Yu-Ri Lee, and Myung Ae Bae
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Catalysis ,Mice ,In vivo ,Lipid droplet ,3T3-L1 Cells ,Materials Chemistry ,Animals ,Zebrafish ,Fluorescent Dyes ,biology ,Chemistry ,Adipose tissue metabolism ,Metals and Alloys ,Lipid metabolism ,General Chemistry ,biology.organism_classification ,Lipid Metabolism ,Fluorescence ,Molecular biology ,Small molecule ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Molecular Imaging ,Adipose Tissue ,Cell culture ,Ceramics and Composites ,Biophysics - Abstract
A new small molecule probe for in vivo lipid imaging, LipidGreen (compound 5), was developed. LipidGreen stained lipid droplets in 3T3L1 cell lines and fat deposits in zebrafish without apparent toxicity up to 100 μM. The utility of LipidGreen as a drug screening platform for fat regulation was also demonstrated in live zebrafish.
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- 2011
15. Effects of modified dynamic metacarpophalangeal joint flexion orthoses after hand burn
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Ji Soo Choi, Yun Jae Jung, Jeong Hyeon Mun, Ju Youn Lee, Ki Un Jang, Cheong Hoon Seo, and Jong Hyun Jeon
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Hand deformity ,medicine.medical_specialty ,Rehabilitation ,business.industry ,medicine.medical_treatment ,Hand therapy ,Metacarpophalangeal joint ,Acquired ,medicine.disease ,Orthotic device ,Grip strength ,medicine.anatomical_structure ,Hand deformities ,Physical therapy ,Medicine ,book.journal ,Original Article ,Orthotic devices ,business ,Splint (medicine) ,Range of motion ,Burns ,book - Abstract
Objective To assess the effectiveness of modified dynamic metacarpophalangeal joint flexion orthoses for treatment of post-burn hand contractures. Method We enrolled 42 hand burn patients with limited range of motion at the metacarpophalangeal joints in this study. The patients were randomly assigned into either a control or an orthotic group. Both groups received the standard rehabilitation therapy focused on hand therapy; 21 subjects in the orthotic group wore a splint for 3 hours per day for 8 weeks. Hand function was measured by active range of motion, grip strength and other assessment tools. All parameters were estimated using the Mann-Whitney U test at the beginning and the end of the treatment after 8 weeks. Results The 21 subjects that had an orthotic intervention showed significant improvement in the range of motion at 2nd, 3rd, 4th and 5th metacarpophalangeal joints (p0.05). There was a significant difference in the hand function scales between the 2 groups (p
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- 2011
16. Treatment of Olecranon Fractures with Proximal Ulna Comminution Using Locking Compression Plates
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Tae Ho Kim, Jong-Hyun Jeon, Jae-Cheon Sim, Sung-Sik Ha, Min-Chul Sung, and Ki-Do Hong
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medicine.medical_specialty ,medicine.anatomical_structure ,business.industry ,General surgery ,Olecranon ,Orthopedic surgery ,medicine ,Creative commons ,business ,Proximal ulna - Abstract
59 Copyright c 2015 The Korean Fracture Society. All rights reserved. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/ by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Received December 12, 2014 Revised December 24, 2014 Accepted December 24, 2014 Address reprint requests to: Tae-Ho Kim, M.D. Department of Orthopedic Surgery, Sahmyook Medical Center, 82 Mangu-ro, Dongdaemun-gu, Seoul 130-711, Korea Tel: 82-2-2210-3324ᆞFax: 82-2-2212-2673 E-mail: crash1401@naver.com
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- 2015
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17. Outcomes of Ultrasound-Guided Extracorporeal Shock Wave Therapy for Painful Stump Neuroma
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Jong Hyun Jeon, Ah Young Jun, Won Yong Park, Jeong Hyeon Mun, Ki Un Jang, Yun Jae Jung, Cheong Hoon Seo, and Yoon Soo Cho
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medicine.medical_specialty ,Amputation stumps ,Extracorporeal shock wave therapy ,business.industry ,Visual analogue scale ,medicine.medical_treatment ,Rehabilitation ,Ultrasound ,Neuroma ,medicine.disease ,Transcutaneous electrical nerve stimulation ,Ultrasound guided ,Surgery ,law.invention ,Amputation ,law ,McGill Pain Questionnaire ,medicine ,Original Article ,sense organs ,business ,Ultrasonography - Abstract
Objective To investigate the effect of extracorporeal shock wave therapy (ESWT) on painful stump neuroma. Methods Thirty patients with stump neuroma at the distal end of an amputation site were assigned randomly to the ESWT group (n=15) and the transcutaneous electrical nerve stimulation (TENS)+desensitization+pharmacological treatment group (n=15). For 3 weeks, the ESWT group received a weekly session involving 1,500 pulses at 0.10 mJ/mm2, while the control group was treated 10 times each, 40 minutes per day with TENS and desensitization treatment, and daily medication for 3 weeks. ESWT stimulation was given by focusing on the area at the neuroma site clearly identified by ultrasound. Results The changes in the McGill pain questionnaire were 38.8±9.0 prior to treatment and 11.8±3.1 following the treatment. The corresponding values for the control group were 37.2±7.7 and 28.5±10.3. The changes between groups were significantly different (p=0.035). The change in visual analog scale prior to and after treatment was 7.0±1.5 and 2.8±0.8 in the ESWT group, respectively, and 7.2±1.4 and 5.8±2.0 in the control group. These changes between the groups were also significantly different (p=0.010). The outcome in the pain rating scale also showed significant differences between groups (p0.05). Conclusion The study findings imply that ESWT for stump neuroma is superior to conventional therapy.
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- 2014
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18. Synthesis of LipidGreen2 and its application in lipid and fatty liver imaging
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Myoung Joo Park, Jin Hee Ahn, Myung Ae Bae, Hee-Chung Chung, Jae Hong Lee, Cheol-Hee Kim, Jae-Ho Ryu, Jong Hyun Jeon, Juhoon So, Hang-Suk Chun, and Haushabhau S. Pagire
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Fatty liver ,Biology ,medicine.disease ,biology.organism_classification ,Lipids ,Fluorescence ,Small molecule ,Cell Line ,Molecular Imaging ,Fatty Liver ,Mice ,Biochemistry ,Cell culture ,Molecular Probes ,medicine ,Animals ,Humans ,Molecular Biology ,Zebrafish ,Fluorescent Dyes ,Biotechnology - Abstract
We have developed LipidGreen2, a second generation small molecule probe for lipid imaging. LipidGreen2 has a better fluorescence signal compared with the previous LipidGreen, and selectively stains neutral lipids in cells and fat deposits in live zebrafish. We also demonstrate the application of LipidGreen2 for detecting fatty liver.
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- 2013
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19. CFD Study on Aerodynamic Power Output Changes with Inter-Turbine Spacing Variation for a 6 MW Offshore Wind Farm
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Nak Joon Choi, Sang Hyun Nam, Jong Hyun Jeong, and Kyung Chun Kim
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aerodynamic power output ,CFD (computational fluid dynamics) ,inter-turbine spacing ,layout ,offshore wind farm ,Technology - Abstract
This study examined the aerodynamic power output change of wind turbines with inter-turbine spacing variation for a 6 MW wind farm composed of three sets of 2 MW wind turbines using computational fluid dynamics (CFD). The wind farm layout design is becoming increasingly important as the use of wind energy is steadily increasing. Among the many wind farm layout design parameters, the inter-turbine spacing is a key factor in the initial investment cost, annual energy production and maintenance cost. The inter-turbine spacing should be determined to maximize the annual energy production and minimize the wake effect, turbulence effect and fatigue load during the service lifetime of wind turbines. Therefore, some compromise between the aerodynamic power output of wind turbines and the inter-turbine spacing is needed. An actuator disc model with the addition of a momentum source was not used, and instead, a full 3-dimensional model with a tower and nacelle was used for CFD analysis because of its great technical significance. The CFD analysis results, such as the aerodynamic power output, axial direction wind speed change, pressure drop across the rotor of wind turbine, and wind speed deficit due to the wake effect with inter-turbine spacing variation, were studied. The results of this study can be applied effectively to wind farm layout design and evaluation.
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- 2014
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20. Clinical and Polysomnographic Comparison between Narcolepsy without Cataplexy and Idiopathic Hypersomnia
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Tae Won Kim, Se Yeon Chang, Soo Hyun Joo, Ho Jun Seo, Jong Hyun Jeong, Jin Hee Han, Emmanuel Mignot, and Seung Chul Hong
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Narcolepsy ,Cataplexy ,Idiopathic hypersomnia ,HLA ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Background and Objective The aim of this study is to compare the clinical, electrophysiological (Polysomnography, PSG; Multiple Sleep Latency Test, MSLT) and biological data (HLA DQB1*0602 typing) in idiopathic hypersomnia with narcolepsy without cataplexy. Methods 80 patients with narcolepsy without cataplexy and 71 patients with idiopathic hypersomnia without a long sleep time were recruited at the Sleep Center of St. Vincent’s Hospital. MSLT data and PSG findings from the time of their diagnosis were reviewed. HLA typing was performed. Results Results indicated that the idiopathic hypersomnia group showed a significant longer mean sleep latency in MSLT compared with the narcolepsy without cataplexy group. But there was no significant difference in the Epworth Sleepiness Scale (ESS) scores between the two groups. Although HLA positivity of both groups was not statistically significant (p = 0.065), HLA positivity tended to be higher in the narcolepsy without cataplexy group than the idiopathic hypersomnia group. The number of awakenings was slightly higher in the idiopathic hypersomnia group, but there was no statistical significance. The number of spontaneous arousal and total arousal indices was not significantly different between the groups. For the PSG, the idiopathic hypersomnia group showed a significantly longer sleep latency than the narcolepsy without cataplexy group (p = 0.009). REM sleep latency (REML) was significantly shorter in the narcolepsy without cataplexy group compared to the idiopathic hypersomnia group. The percentage of REM (SREM) was significantly higher in the narcolepsy without cataplexy group, and the percentage of the wake time during sleep period (SWT) was significantly lower in the narcolepsy without cataplexy group. Conclusions There were no significant differences of subjective sleep measures such as ESS, disturbed nocturnal sleep, number of naps, age of onset of hypnagogic hallucination, and age of onset of sleep paralysis between patients with narcolepsy without cataplexy and idiopathic hypersomnia. So, the use of objective tests such as the PSG and MSLT may be inevitable for the differential diagnosis of narcolepsy without cataplexy from idiopathic hypersomnia.
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- 2012
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21. The Correlation between Clinical Variables and Sleep Onset Rapid Eye Movement Period Frequencies in Narcoleptic Patients
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Jin Hwa Jeong, Jeong-Yu Kim, Bo Eun Yoo, Seung-Chul Hong, Jong Hyun Jeong, Hyun-Kook Lim, Ho-Jun Seo, Jin-Hee Han, Sung-Pil Lee, Jae-Hyun Kim, and Emmanuel Mignot
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Narcolepsy ,Sleep onset rapid eye movement periods ,Cataplexy ,Sleep paralysis ,Hypnagogic hallucination ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Background and Objective A diagnosis of narcolepsy is defined by less than 8 minutes of mean sleep latency, and two or more sleep onset rapid eye movement periods on the Multiple Sleep Latency Test. This study examined the relationship between the sleep onset rapid eye movement period frequencies during Multiple Sleep Latency Test and narcoleptic symptom severity. Methods From March 2004 to August 2009, 126 patients suffering from excessive daytime sleepiness who visited the Sleep Disorders Clinic of St. Vincent’s Hospital at the Catholic University of Korea were tested by polysomnography and Multiple Sleep Latency Test. Subjects were divided into three groups according to the number of sleep onset rapid eye movement periods that appeared on the Multiple Sleep Latency Test. Symptom severity instruments included the Epworth Sleepiness Scale and the Stanford Center for Narcolepsy Sleep Inventory, and various sleep parameters. In addition, we performed human leukocyte antigen genotyping for human leukocyte antigen-DQB1*0602 on all patients. Results Among the three groups classified by the number of sleep onset rapid eye movement periods during Multiple Sleep Latency Test, we found no significant differences in demographic features, Epworth Sleepiness Scale, and most polysomnographic findings. However, we observed cataplexy, hypnagogic hallucination, sleep paralysis, and human leukocyte antigen-DQB1*0602 positivity more frequently in groups with higher sleep onset rapid eye movement period frequencies. In addition, the proportions of stage II sleep, REM sleep latency from polysomnography, and mean sleep latency and mean REM sleep latency from the Multiple Sleep Latency Test significantly decreased with increasing sleep onset rapid eye movement period frequency. Conclusions In this study, we demonstrated that sleep onset rapid eye movement period frequency during Multiple Sleep Latency Test correlated with sleep architecture, daytime symptom severity, and frequency of human leukocyte antigen-DQB1*0602 positivity in narcolepsy. Further studies are needed to explore the pathophysiology of narcolepsy associated with sleep onset rapid eye movement periods.
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- 2010
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22. Burn Rehabilitation Massage Therapy Benefits Hypertrophic Scarring.
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Yoon Soo Cho, Jong Hyun Jeon, Aram Hong, Hyeong Tae Yang, Haejun Yim, Yong Suk Cho, Do-Hern Kim, Jun Hur, Jong Hyun Kim, Wook Chun, Boung Chul Lee, and Cheong Hoon Seo
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BURNS & scalds complications ,HYPERTROPHIC scars ,BURNS & scalds ,MASSAGE therapy ,THERAPEUTICS - Abstract
The article discusses a study involving 146 burn patients with hypertrophic scars aimed at assessing burn rehabilitation massage therapy as an option for relief. Topics discussed include the participation of patients admitted to the researchers' hospital for hypertrophic scarring rehabilitation after critical burn treatments and the conclusion that burn rehabilitation massage therapy is an option to manage post-burn hypertrophic scar characteristics.
- Published
- 2014
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