황반하출혈에서 유리체강내 조직플라스미노겐 활성체 및 SF6 가스충전술, 유리체절제술의 치료효과

김민욱,임지원.Min Uk Kim. MD. Ji Won Lim. MD 대한안과학회 2010 대한안과학회지 Vol.51 No.11

Purpose: To evaluate the results of vitrectomy-assisted intravitreal tissue plasminogen activator (tPA) and SF6 gas injection in the treatment of submacular hemorrhage. Methods: Thirty-one eyes of 30 consecutive patients with submacular hemorrhages undergoing vitrectomy with intravitreal tPA (50 μg/0.1 ml) and SF6 gas injection and completed 12 months of follow-up were evaluated. Results: The mean duration of visual symptoms was 4.1 days. Submacular blood was completely displaced in all 31 eyes after surgery. The best corrected visual acuity (logMAR) improved to 0.56 ± 0.46 at 12 months from 1.15 ± 0.51 at baseline (P = 0.002). The most important factors related to visual acuity at the 12-month follow-up were the underlying etiology for the submacular hemorrhage and visual acuity 3 months after surgery (P = 0.003 and P = 0.000, respectively). The 12-month visual acuity was independent of age, gender, presence of vitreous hemorrhage, sub-ILM hemorrhage, baseline visual acuity, duration of symptoms, and the diameter of the submacular hemorrhage. No retinal detachment or re-submacular hemorrhage developed during the follow-up period. Conclusions: This surgical technique can effectively displace submacular hemorrhage without complications. The 3-month visual acuity appears to predict the 12-month visual acuity. The final visual acuity was associated with the primary etiology for the submacular hemorrhage. J Korean Ophthalmol Soc 2010;51(11):1459-1463

군수지원함의 CODAD, CODLOD 및 CODLAD 추진체계에 따른 연료 소비량 비교 및 분석

김민욱,오진석,Kim, Min-wook,Oh, Jin-seok 한국정보통신학회 2017 한국정보통신학회논문지 Vol.21 No.5

천안함 피격사건 이후 대한민국 해군은 함정에 복합 추진체계를 탑재하여 운항 시 발생하는 진동 및 소음 문제를 줄이기 위한 노력을 기울이고 있다. 복합 추진체계는 함정의 저속 운항 구간에서 추진용 전동기를 이용하여 추진할 수 있는 장점을 가진다. 이는 기존의 내연기관만으로 이루어져 있는 기계 추진체계보다 우수한 정숙성을 가질 수 있고, 내연기관의 연료 효율이 불량한 저속 구간에서 전동기를 이용하기 때문에 보다 경제적이다. 이에 본 논문에서는 대한민국 해군에서 운용하고 있는 군수지원함을 바탕으로 가상함정을 설정하였으며 기존의 추진체계와 복합 추진체계의 연료 소비량을 시뮬레이션 하여 경제성 측면에서 비교 및 분석하였다. 그 결과 전동기를 겸하여 운용할 수 있는 복합 추진체계의 연료 효율이 상대적으로 개선된 것을 확인하였다. After patrol corvett Cheonan was hit and sank on duty, the Republic of Korea Navy has tried to install hybrid propulsion system on naval ship to reduce vibration and noise problems during navigation. The hybrid propulsion system has advantage that propulsion motor can be propelled in low speed operation of the vessel. This can be a better quietness than a mechanical propulsion system which consists of a conventional internal combustion engines. And more economical operation is possible by using a propulsion motor in a low speed operation where a fuel efficiency of the internal combustion engine is poor. In this paper, we set up virtual ship on the basis of a combat support ship in the Republic of Korea Navy, economically compared and analyzed fuel consumption between conventional and hybrid propulsion system. As a result, it was confirmed that the fuel efficiency of hybrid propulsion system which use electric motor had been relatively improved.

마모된 치열을 가진 환자에서 수직교합고경 변화 없이 수복한 증례

김민욱,김나홍,장희원,이용상,Kim, Minuk,Kim, Nahong,Jang, Hee-Won,Lee, Yong-Sang 대한치과보철학회 2016 대한치과보철학회지 Vol.54 No.2

정상적인 수준의 생리적 마모는 수정이 필요 없으나, 치아 경조직의 상실 속도가 비정상적으로 빠른 경우에는 치아에 심각한 손상을 야기하고 심미적, 기능적 구조를 파괴할 수 있다. 전반적인 치아 마모를 보이는 환자의 치료를 위하여 전악을 보철로 수복하고, 교합거상이 필요할 수도 있지만, 마모된 전치부의 보철 수복을 위한 가용공간 때문에 수직교합고경에 변화를 주는 경우가 아니면 잘 변경시키지 않는다. 본 증례의 환자는 마모된 치열과 치관 파절을 주소로 내원한 74세 남자 환자이다. 임상검사 결과 구치부 지지에 의해 수직고경의 감소가 없음을 확인하고 수직고경 변화 없이 전악 수복하여 만족할 만한 결과를 얻었기에 이를 보고하고자 한다. Although physiologic abrasion in normal range need not to be corrected, when hard tissue of teeth are worn abnormally fast, it can cause severe damage and destroy esthetics and, functional structure of occlusion consequently. To establish a correct occlusal plane and space for the patient with worn dentition, it is necessary to increase vertical dimension. However, actual occlusal vertical dimension remains unhanged with compensation for the increase of alveolar bone height equivalent to the decrease of teeth length. A 74-year-old male presented with worn dentition and fractured tooth. Based on the assessment of OVD including clinical findings, full-mouth rehabilitation without increase of OVD was planned. This case presents that a satisfactory clinical result was achieved by restoring the worn dentition without changing occlusal vertical dimension.

RS-485 통신을 이용한 배관청소 로봇의 모니터링 시스템 개발

김민욱,이헌석,오진석,Kim, Min-wook,Lee, Hun-seok,Oh, Jin-seok 한국정보통신학회 2016 한국정보통신학회논문지 Vol.20 No.5

상 하수도, 해양플랜트 등 다양한 배관이 산업현장에 이용되고 있으며, 이러한 배관의 유지보수 작업은 필수적이다. 특히 산업현장에서 배관 유지보수 작업은 전문 인력이 배관 내 투입되어 작업이 진행되거나, 인력 투입이 불가능한 경우 와이어에 연결된 스크래퍼를 배관에 삽입하는 방식을 이용한다. 그러나 이 방식은 교통체증, 막대한 예산의 투입 등의 문제를 야기한다. 이런 문제점을 해결하기 위한 배관 청소 로봇의 연구, 개발이 진행되고 있다. 현재 배관청소 로봇은 작업 및 운용 상태를 실시간으로 확인할 수 없는 문제점이 있다. 본 논문에서는 배관 청소로봇의 운용, 배관 내부 및 청소 상태를 확인할 수 있도록 카메라로부터 촬영된 영상을 수집하며, 수집된 데이터는 RS-485 통신을 이용하여 모니터링 시스템에 전송하여 사용자가 실시간으로 상태를 확인할 수 있게 구성하였다. Various pipes are used in the many industrial field such as water supply, drainage system and marine plants, so a maintenance of these pipes is essential. Especially, the maintenance of the piping in the industrial field, some professional staffs enter and clean the pipe. If the professional staffs can not enter and clean the pipe, the workers has to use the method of inserting a scraper connected to wire inside the pipe. However, this method demands huge budget and causes a number of problems such as traffic congestion. To solve these problems, pipe cleaning robot has been researching and developing. Many Pipe cleaning robots have a problem, that is impossible to confirm the operating condition of the robot in a real time. This paper suggest pipe cleaning robot with RS-485 which transmit operating and cleaning condition of robot and inner pipe filmed by camera, that user can check.

가상 터치스크린 시스템을 위한 TOF 카메라 기반 3차원 손 끝 추정

김민욱,안양근,정광모,이칠우,Kim, Min-Wook,Ahn, Yang-Keun,Jung, Kwang-Mo,Lee, Chil-Woo 한국정보처리학회 2010 정보처리학회논문지B Vol.17 No.4

TOF(Time of Flight) 기술은 물체의 3차원 깊이 정보 추출을 가능케 하는 기술 중의 하나이다. 하지만, TOF의 카메라의 출력인 깊이 영상을 이용한 물체의 3차원 위치 추출은 몸이나 손 등 크기가 큰 물체의 경우에는 비교적 신뢰성 있는 결과를 얻을 수 있는데 비하여 크기가 작은 손 끝의 경우에는 신뢰할 수 있는 값을 얻기 힘들다. 본 논문에서는 TOF 카메라에서 육면체 손 모델을 이용하여 수정된 손의 영상에서의 위치 정보와 팔 모델을 이용하여 손 끝의 3차원 좌표를 추정한다. 제안된 방법으로 실험을 한 결과 TOF 카메라의 깊이 영상만을 사용하여 인식한 손 끝의 3차원 위치정보와 비교하여 훨씬 더 향상된 결과를 얻을 수 있었다. TOF technique is one of the skills that can obtain the object's 3D depth information. But depth image has low resolution and fingertip occupy very small region, so, it is difficult to find the precise fingertip's 3D information by only using depth image from TOF camera. In this paper, we estimate fingertip's 3D location using Arm Model and reliable hand's 3D location information that is modified by hexahedron as hand model. Using proposed method we can obtain more precise fingertip's 3D information than using only depth image.

Model Based Design Process에 따른 embedded System의 개발

김민욱,최재훈,박인철,황호성,Kim, Min Wook,Choi, Jae Hoon,Park, In Chul,Hwang, Ho Sung 한국시스템엔지니어링학회 2009 시스템엔지니어링학술지 Vol.5 No.2

An embedded system is a computer system designed to perform one or a few dedicated functions often with real-time computing constraints. A traditional design process of embedded systems is the development of document-centric approach, and it is difficult to develop an embedded system efficiently because communication between teams or steps is not smooth. So the Model Based Design Process are applied to the development of embedded systems. This paper will compare the Model Based Design Process and the traditional design process, and introduce example of development of vehicle device applied the Model Based Design Process.

섬유주절제술 후 홍채절개부를 통한 유리체탈출 1예

김민욱,이효경,강신희,신민철,Min Uk Kim,MD,Hyou Kyung Lee,MD,Shin Hee Kang,MD,Min Chul Shin,MD,PhD 대한안과학회 2012 대한안과학회지 Vol.53 No.4

Purpose: To report the results of anterior vitrectomy for obstruction of the aqueous outflow shunt by prolapsed vitreous strands after trabeculectomy. Case summary: Trabeculectomy was performed on a pseudophakic primary open angle glaucoma patient with uncontrolled intraocular pressure under maximum tolerable medical therapy. Three months after trabeculectomy, the bleb flattened and the intraocular pressure elevated. On gonioscopic examination, vitreous strands prolapsed through the iridectomy site obstructing the inner ostium. The maximum tolerable medical therapy and Nd:YAG laser vitreolysis were attempted, but the intraocular pressure was not controlled. Anterior vitrectomy was performed to remove the prolapsed vitreous strands. After anterior vitrectomy, the bleb regained filtering function and the intraocular pressure was stabilized. Conclusions: In a case with a prolapsed vitreous into the anterior chamber obstructing the outflow shunt of the aqueous humor after trabeculectomy, anterior vitrectomy showed therapeutic effects. J Korean Ophthalmol Soc 2012;53(4):602-606

The Test-Retest Reliability of Supraspinatus Cross-Sectional Area Measurement by Sonography

김민욱,Yang Soo Kim,Nam Yeon Heo 대한재활의학회 2011 Annals of Rehabilitation Medicine Vol.35 No.4

Objective To evaluate the test-retest reliability of supraspinatus cross-sectional area measurement by ultrasonography. Method Both shoulders of 11 normal subjects (22 shoulders in total) were included in this study. The supraspinatus muscle was examined with the arm alongside the body in the coronal oblique and sagittal oblique planes. Th e occupational ratio of the supraspinatus fossa was measured. To calculate the occupational ratio, the Y view of MRI was reproduced with sonography by locating the suprascapular notch in the coronal oblique plane (in the plane of the scapula) and then rotating the transducer 90˚ to that plane. Th e cross-sectional area was measured using the tracing and ellipse tool. Th e second measurement was performed 7 days after the initial measurement. Results The Pearson correlation coefficient and intraclass correlation coefficient between the first and the second occupational ratio measurements were 0.43 and 0.44, respectively, for the tracing method, and 0.53 and 0.47, respectively, for the ellipsoidal method. The difference between the first and second occupational ratio measurement was 4.1±3.9% (0.1-13.2%) for the tracing method, and 4.5±3.4% (0.01-10.5%) for the ellipsoidal method. Th e maximum difference was 13.2%. Th e occupational ratio was 86.2±5.3% (70.6-95.8%) for the tracing method and 85.0±5.2% (69.3-96.1%) for the ellipsoidal method. Conclusion Supraspinatus occupational ratio by sonography is a low to moderately reliable intrarater method. However, the maximum diff erence was not signifi cant. Th e main reason for its low to moderate reliability was the narrow value range. Therefore, the study method should be re-evaluated in stroke patients and in patients with rotator cuff disease. Knowledge of the anatomy is a prerequisite to attain intrarater reliability.

3D 융합기술을 활용한 악교정 수술 장치 개발

김민욱(M. U. Kim),김윤호(Y. H. Kim),김영석(Y. S. Kim) 한국정밀공학회 2017 한국정밀공학회 학술발표대회 논문집 Vol.2017 No.12월

농업지역(밭) 암모니아 등 대기오염물질 계절별 모니터링 연구

김민욱 ( Min-wook Kim ),김진호 ( Jin-ho Kim ),김경식 ( Kyeong-sik Kim ),홍성창 ( Sung-chang Hong ) 한국환경농학회 2021 한국환경농학회지 Vol.40 No.3

BACKGROUND: Fine particulate matter (PM_2.5) is produced by chemical reactions between various precursors. PM_2.5 has been found to create greater human risk than particulate matter (PM₁₀), with diameters that are generally 10 micrometers and smaller. Ammonia (NH₃) and nitrogen oxides (NOx) are the sources of secondary generation of PM_2.5. These substances generate PM_2.5 through some chemical reactions in the atmosphere. Through chemical reactions in the atmosphere, NH₃ generates PM_2.5. It is the causative agent of PM_2.5. In 2017 the annual ammonia emission recorded from the agricultural sector was 244,335 tons, which accounted for about 79.3% of the total ammonia emission in Korea in that year. To address this issue, the agricultural sector announced the inclusion of reducing fine particulate matter and ammonia emissions by 30% in its targets for the year 2022. This may be achieved through analyses of its emission characteristics by monitoring the PM_2.5 and NH₃. METHODS AND RESULTS: In this study, the PM_2.5 concentration was measured real-time (every 1 hour) by using beta radiation from the particle dust measuring device (Spirant BAM). NH₃ concentration was analyzed real-time by Cavity Ring-Down Spectroscopy (CRDS). The concentrations of ozone (O₃) and nitrogen dioxide (NO₂) were continuously measured and analyzed for the masses collected on filter papers by ultraviolet photometry and chemiluminescence. CONCLUSION: This study established air pollutant monitoring system in agricultural areas to analyze the NH₃ emission characteristics. The amount of PM_2.5 and NH₃ emission in agriculture was measured. Scientific evidence in agricultural areas was obtained by identifying the emission concentration and characteristics per season (monthly) and per hour.