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- 저자 : Soonil Yoo (검색결과 3 건)
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A Case of benign chondroid syringoma of external auditory canal
Soonil Yoo,Eun Hye Shin,Ji Sun Kong,KyoungHo Park 대한두개저학회 2016 대한두개저학회지 Vol.11 No.2
The chondroid syringoma, known to be a mixed tumor of the skin, is an extremely rare benign cutaneous neoplasm of the external auditory canal. We encountered a 47-year-old man with a mass in his left external auditory canal, and the mass was histologically diagnosed as chondroid syringoma, having both epithelial and mesenchymal stromal components. There were no signs of recurrence after surgery during a 15 month follow-up examination. The chondroid syringoma in the external auditory canal is an interesting case, and we discuss this benign tumor of the sweat glands in the context of the relevant literature.
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Development of 12 Meter Low Floor Fuel Cell Bus
Seo-Ho Choi,Soonil Jeon,Nam-Woo Lee,Sung-Jin Jung,Daejong Kim,Chanjin Nam,Kiho Yoo,Tae-Won Lim 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Hyundai Motor Company(HMC) developed a 12 meter long low floor fuel cell hybrid bus(FCB). For the main electric power source. the 160㎾ PEM fuel cell system. which generates only water vapor as a byproduct, was developed. As the weight of the bus is much heavier than that of passenger vehicle and the urban transit bus should decelerate and accelerate again at every bus stop. ultra-capacitor was developed as a secondary power source to maximize the amount of energy which captured during regenerative braking. The HMC’s FCB is the world first fuel cell bus that is hybridized with ultra-capacitor. A 240㎾ induction motor and an inverter were developed since they provide lower cost than PMSM(Permanent Magnet Synchronous Motor) and relatively high efficiency when the power rating is high. For the hydrogen storage system, type 2 high pressure tanks are used and they could carry 40 ㎏ of hydrogen and offer 300 ㎞ of driving range. HMC developed fuel cell system controller, vehicle controller, and hybrid controller, thus the bus can be driven in the near optimum conditions to improve the driving range. Four more FCB’s will be manufactured and driven on the road under the Korean govemment(MOCIE) funded fuel cell vehicle fleet program until 2009.
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Myung-Jin Cha,Jun Kim,Yoon Jung Park,Min Soo Cho,Hyoung-Seob Park,Soonil Kwon,Young Soo Lee,Jinhee Ahn,Hyung-Oh Choi,Jong-Sung Park,YouMi Hwang,Jin Hee Choi,Ki-Won Hwang,Yoo-Ri Kim,Seongwook Han,Seil 대한심장학회 2022 Korean Circulation Journal Vol.52 No.7
Background and Objectives: Atrial tachycardias (ATs) from noncoronary aortic cusp (NCC) uncovered after radiofrequency ablation for atrial fibrillation (AF) are rarely reported. This study was conducted to investigate the prevalence and clinical characteristics of NCC ATs detected during AF ablation and compare their characteristics with de novo NCC ATs without AF. Methods: Consecutive patients who underwent radiofrequency catheter ablation for AF were reviewed from the multicenter AF ablation registry of 11 tertiary hospitals. The clinical and electrophysiological characteristics of NCC AT newly detected during AF ablation were compared with its comparators (de novo NCC AT ablation cases without AF). Results: Among 10,178 AF cases, including 1,301 redo ablation cases, 8 (0.08%) NCC AT cases were discovered after pulmonary vein isolation (PVI; 0.07% in first ablation and 0.15% in redo ablation cases). All ATs were reproducibly inducible spontaneously or with programmed atrial stimulation without isoproterenol infusion. The P-wave morphological features of tachycardia were variable depending on the case, and most cases exhibited 1:1 atrioventricular conduction. AF recurrence rate after PVI and NCC AT successful ablation was 12.5% (1 of 8). Tachycardia cycle length was shorter than that of 17 de novo ATs from NCC (303 versus 378, p=0.012). No AV block occurred during and after successful AT ablation. Conclusions: Uncommon NCC ATs (0.08% in AF ablation cases) uncovered after PVI, showing different characteristics compared to de-novo NCC ATs, should be suspected irrespective of P-wave morphologies when AT shows broad propagation from the anterior interatrial septum.
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