Corrigendum to: Successful reconstruction using a deepithelialized rectangular flap on a nipple necrosis site after DIEP flap-based breast reconstruction: a case report

서현준,박성오,장란숙,김연환,민경현 대한미용성형외과학회 2023 Archives of Aesthetic Plastic Surgery Vol.29 No.1

In the article entitled “Successful reconstruction using a de-epithelialized rectangular flap on a nipple necrosis site after DIEP flap-based breast reconstruction: a case report” [1], the name of one of the authors was incorrectly presented: Sung Oh Park should read Seung Oh Park

국내 자연산 명태(Gadus chalcogrammus) 집단의 바이러스 모니터링

서현준,남우화,김정호,Seo, Hyun-Joon,Nam, U-Hwa,Kim, Jeong-Ho 한국어병학회 2018 한국어병학회지 Vol.31 No.2

Wild walleye pollock were caught from Goseong, The East Sea of Korea and examined for the existence of several fish pathogenic viruses; viral hemorrhagic septicemia virus (VHSV), nervous necrosis virus (NNV) and marine birnavirus (MABV). We collected 1,253 wild walleye pollock in total during February 2015 and August 2018. 324 spleen sample sets and 259 brain sample sets were made, and examined for the existence of the viruses mentioned above by reverse transcriptase polymerase chain reaction (RT-PCR). None of the target viruses were detected by one-step PCR. When some of these samples were further examined by two-step PCR, 19.7% (36/183) of spleen sample sets were positive for VHSV, and 4.4% (8/183) of spleen sample sets and 1.2% (3/259) of brain sample sets were positive for NNV. The target sequences of these viruses were clustered with those previously reported in Korea (Genotype IVa of VHSV, RGNNV genotype of NNV) by phylogenetic analysis. The activity of these viruses are not clear because virus isolation was not attempted, but probably very low because all the positive samples were detected by two-step PCR. 2015년 2월부터 2018년 8월까지 총 1,253 마리의 자연산 명태 (Gadus chalcogrammus)를 강원도 고성 아야진항 근해에서 정치망을 사용하여 포획한 후, 바이러스 (viral hemorrhagic septicemia virus, VHSV; nervous necrosis virus, NNV; marine birnavirus, MABV) 모니터링을 RT-PCR법으로 수행하였다. One-step PCR법으로 비장시료 및 뇌시료에서는 대상 바이러스가 모두 검출되지 않았으며, 일부 시료를 two-step PCR법으로 검사한 결과 VHSV는 19.7% (36/183)의 비장시료에서 검출되었다. 또한, NNV는 4.4% (8/183)의 비장시료, 1.2% (3/259)의 뇌시료에서 검출되었다. 검출된 바이러스의 계통분석 결과, 기존의 국내에서 분리되는 바이러스의 유전형에 각각 속하는 것으로 나타났다 (Genotype IVa, RGNNV genotype). 바이러스의 분리를 시도하지 않아 검출된 바이러스의 활성은 알 수 없지만, 모든 양성 시료가 two-step PCR법으로 검출되었으므로 매우 낮을 것으로 추측된다.

Surgical outcomes of split-thickness skin grafts versus free flaps of the lateral thoracic region for incurable chronic venous ulcers

서현준,박성오,김연환 대한수부외과학회 2022 대한수부외과학회지 Vol.27 No.4

Purpose: This study conducted a comparative analysis of the effectiveness of split-thickness skin grafts (STSGs) and free flaps of the lateral thoracic region performed for coverage after extensive debridement in patients with difficult-to-treat chronic venous ulcers (CVUs) with severe symptoms. Methods: This retrospective, single-center study included 20 patients (28 cases) with CVUs. Patients who received an STSG or free-flap procedure were included in the study. Data comparing these two groups were analyzed. Results: The STSG and free-flap groups showed no significant differences in patient demographics. There was no significant difference in wound size before and after debridement between the two groups (before, 52.25±58.03 cm2 vs. 37.69±32.83 cm2, p=0.407; after, 210.92±202.80 cm2 vs. 142.63±84.01 cm2, p=0.291). Wound disruption was not significantly different between the groups (p=0.231). However, a significant difference was found in recurrence between the STSG group (n=7, 58.3%) and the free-flap group (n=1, 6.3%) (p=0.004). Conclusion: Free-flap surgery may be a good option for difficult-to-treat, recurrent CVU. Because venous ulcers require extensive debridement, a lateral thoracic region free flap, which enables the harvest of large and various forms of flaps, could be the best choice for microsurgery.

Multiple Types of Security Threats in East Asia: Regional Hegemonic Challenge and Japan’s Remilitarization

서현준,진은선 연세대학교 사회과학연구소 2023 社會科學論集 Vol.54 No.1

Is the current regional security environment suitable for Japan’s remilitarization? This paper attempts to analyze the recent security condition in East Asia to see whether the structural requirements for Japan’s remilitarization are already in place. It first looks into the existing literatures examining the issues of Japan’s remilitarization. It then adopts the hegemonic stability theory as a basis for the theoretical structure while presenting its limits to draw a more suitable framework for the current security condition in East Asia. After that, three cases of China, Russia, and North Korea in recent years are examined to see whether the security condition in East Asia fits the condition of crisis described by the theoretical argument. It is revealed that they represent long-term, immediate, and mid-term threats, respectively. Furthermore, while each of these actors did not fulfill all necessary standards to become a single challenging state, taken together, their actions have created the perception of regional hegemonic challenge in the eyes of the US and its key allies. In conclusion, this research argues that the structural requirements for Japan’s remilitarization are now present.

Successful reconstruction using a de-epithelialized rectangular flap on a nipple necrosis site after DIEP flap-based breast reconstruction: a case report

서현준,박성오,장란숙,김연환,민경현 대한미용성형외과학회 2022 Archives of Aesthetic Plastic Surgery Vol.28 No.4

Postmastectomy nipple necrosis is a factor that leads to a poor aesthetic outcome in breast reconstruction because of the unique projective structure of the nipple. We present a case of successful nipple reconstruction using a de-epithelialized rectangular flap. A 45-year-old woman was diagnosed with left breast cancer. She had a vertical scar below the nipple-areolar complex due to previous reduction mammoplasty. She underwent nipple-sparing mastectomy, breast reconstruction with a deep inferior epigastric artery perforator (DIEP) flap, and contralateral reduction. After the operation, the nipple gradually necrotized, and full-thickness nipple necrosis was observed on postoperative day 12. For nipple reconstruction, we designed a 38×23 mm rectangular flap from the DIEP flap considering the contralateral nipple diameter (12 mm), protrusion (2 mm), and ipsilateral mastectomy skin flap thickness (15 mm). The area in contact with the mastectomy skin flap was placed in the defect area after de-epithelialization. The reconstruction was successful and the nipple survived with a slight loss of projection. When unexpected nipple necrosis occurs after DIEP-based breast reconstruction, designing a de-epithelialized rectangular flap using the DIEP flap tissue is a feasible reconstructive method to consider.

AI 영상 인식 모듈을 통한 운전자 관리 감독 시스템 구현

서현준 ( Hyun Jun Suh ),김민지 ( Min Ji Kim ),심재현 ( Jae Hyun Shim ),이승돈 ( Seung Don Lee ),나정은 ( Jeongeun Nah ) 한국정보처리학회 2023 한국정보처리학회 학술대회논문집 Vol.30 No.2

매년 졸음 및 부주의 운전으로 인한 교통사고로 인명 및 재산 피해가 끊이지 않고 있다. 즉각적인 졸음 감지만을 위한 기존 시스템의 단점과 한계를 보완하고자, 본 논문에서는 위험 행동을 감지한 후 당시 사진과 데이터를 저장하고 이를 점수로 환산하여 장기적인 운전 습관 개선을 목표로 하는 운전자 관리 감독 시스템을 구현하였다. 이 시스템은 화물차 운전자와 같이 장시간 운전을 하는 대상에게 안전 주행을 장려하고 올바른 운전문화를 확립하게 하여 교통안전에 긍정적 역할을 담당할 수 있다.

에어로겔의 치환율에 따른 산화마그네슘 경화체의 물리·역학적 특성

서현준(Seo, Hyun-Jun),이승호(Lee, Seung-Ho),이동훈(Lee, Dong-Hoon),이상수(Lee, Sang-Soo) 대한건축학회 2016 대한건축학회 학술발표대회 논문집 Vol.36 No.2

코끼리조개(Panopea japonica)에서 분리되는 비브리오속 세균의 동정

서현준 ( Hyun-joon Seo ),남우화 ( U-hwa Nam ),김정호 ( Jeong-ho Kim ) 한국어병학회 2020 한국어병학회지 Vol.33 No.2

코끼리조개 성패 및 유생으로부터 잠재적 병원성 세균 분리 및 동정을 수행하였다. 분리된 균주는 분자생물학적 기법 및 생화학적 검사를 통해 동정하였으며, 명확한 동정 및 계통수 분석을 위해 16S rDNA와 하우스키핑 유전자 (pyrH, recA, rpoA)를 결합하여 분석하는 MLSA를 적용하였다. 총 141개의 균주가 분리되었으며, 건강한 성패에서는 10개, 수포 병변을 보이는 빈사 상태의 성패에서 52개, 유생에서 79개가 분리되었다. 이 중 빈사상태의 성패에서 46개, 유생에서 39개의 균주가 Vibrio 속 세균으로 동정되었으며, 나머지 균주들은 모두 일반해양세균으로 동정되었다. Vibrio 속 세균 중에서는 수포 병변을 보이는 성패에서 Vibrio splendidus가 가장 많이 분리되었으며 기존의 V. splendidus와 함께 동일한 클러스터를 형성하였다. 하지만, 인위감염실험을 실시하지 않았고 건강한 유생에서도 V. splendidus가 분리되어 성패에서 나타난 수포와 V. splendidus와의 관계는 확실하지 않으며, 차후 추가 연구가 필요할 것으로 생각된다. We attempted to isolate and identify potentially pathogenic bacteria from geoduck clam (Panopea japonica) larvae, juvenile and adult, focusing on Vibrios. The isolates were identified by molecular approach and biochemical characterization. In particular, we applied MLSA (multilocus sequence analysis) to the isolated Vibrios for clear identification and phylogenetic relationships, by combining 16s rDNA and several houskeeping genes (pyrH, recA, rpoA). We obtained 141 isolates; 10 from healthy adults, 52 from moribund adults with blisters and 79 from larvae. 46 from the moribund adults and 39 from the larvae were identified as Vibrio species, while the rest of these samples and all the isolates from healthy adult were identified as marine general bacteria. Among Vibrio species, Vibrio splendidus was the most frequently identified from the moribund adults and clustered with the known V. splendidus in GenBank by MLSA. However, it was still unclear that V. splendidus was the cause of blisters because the artificial infection experiment was not conducted and V. splendidus was isolated also from the larvae. Further studies are necessary to clarify the etiological agent of the blisters found in geoduck clam in this study.

전기차용 리저버탱크 형상에 따른 유동특성의 실험적 연구

서현준(Hyunjun Seo),박종진(Jongjin Park),정민지(Minji Jeong),권영후(Younghoo Kwon),신지섭(Jisub Shin) 한국자동차공학회 2023 한국자동차공학회 학술대회 및 전시회 Vol.2023 No.11

Sickle-shaped transposition flap oriented along relaxed skin tension lines for lower eyelid reconstruction

이태현,서현준,박성오 대한미용성형외과학회 2020 Archives of Aesthetic Plastic Surgery Vol.26 No.4

Background The reconstruction of defects in the lower eyelid region is prone to complications such as ectropion and epiphora. This area is also aesthetically important; therefore, operations should be carried out with caution. We introduce a simple and easy surgical approach for the repair of small to moderate-sized lower eyelid defects. Methods A retrospective chart review was performed for all patients who underwent lower eyelid defect reconstruction using a sickle-shaped transposition flap in 2018 or 2019. Photographs were taken at each visit, and the Vancouver Scar Scale was used to evaluate residual marks every 3 months for 1 year. Patients reported their subjective satisfaction levels on a visual analogue scale that ranged from 0 to 10. Results A total of nine patients were included. No flap necrosis, ectropion, epiphora, or other complications were observed. Among the eight patients with skin cancer, no recurrence was noted during the follow-up period. The mean Vancouver Scar Scale scores were 5.50±0.99 at 3 months postoperatively, 4.61±0.85 at 6 months postoperatively, 3.05±0.80 at 9 months postoperatively, and 1.11±0.58 at 12 months postoperatively. The mean overall patient satisfaction rating was 9.11±0.78 (as rated on the visual analogue scale). Conclusions In the reconstruction of lower eyelid defects, the sickle-shaped transposition flap could be a simple, fast, and aesthetically favorable surgical option.