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윤재하,정보영,전찬,서연림,김형진,김윤덕,Jae-Ha Yun,M,D,Bo-Young Jung,M,D,Chan Jeon,M,D,Yeon-Lim Suh,M,D,Hyung-Jin Kim,M,D,Yoon-Duck Kim,M,D 대한안과학회 2008 대한안과학회지 Vol.49 No.11
Purpose: To report two cases of giant cell angiofibroma in the orbit. Case summary: (Case 1) A 17-year-old girl was referred for evaluation of the left upper eyelid swelling which had developed 6 months ago. On initial examination, a 1.5 cm sized ovoid and nontender mass was palpated in the medial aspect of the left orbit. CT scan and MR imaging of the orbit showed a non-calcified, well-circumscribed homogenous soft tissue mass, which was uniformly enhanced and did not invade the adjacent tissue. Excisional biopsy of the orbital mass was performed. (Case 2) A 30-year-old man presented with left proptosis which had developed 2 months ago and hemorrhage into the upper and lower eyelid which had developed 1 week ago. CT scan and MR imaging showed an heterogeneously enhancing mass, not involving the adjacent tissue in the superior retrobulbar space. Excisional biopsy through a lateral orbitotomy was performed. Histologic evaluation revealed proliferation of spindle cells with pseudovascular spaces and multinucleated giant cells.Immunohistochemical staining for CD34 and vimentin was positive and staining for CD31, smooth muscle actin was negative. A diagnosis of giant cell angiofibroma was made. Conclusions: The possibility of giant cell angiofibroma should be considered in the differential diagnosis for an orbital mass without a hemorrhage or with a hemorrhage in the eyelid in adult patients. J Korean Ophthalmol Soc 2008;49(11):1850-1856
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구면/비구면 레스토렌즈삽입술의 3개월 임상 경과와 환자 만족도에 관련되는 술 전 요소
윤재하,안견,이동훈,정의상,정태영,Jaeha Yun,MD,Kyeon Ahn,MD,Dong Hoon Lee,MD,Eui-Sang Chung,MD,PhD,Tae-Young Chung,MD,PhD 대한안과학회 2010 대한안과학회지 Vol.51 No.1
Purpose: To evaluate results at three months postoperatively on patient satisfaction and preoperative clinical factors affecting patient satisfaction after implantation of an AcrySof ReSTOR intraocular lens (IOL). Methods: Thirty-three eyes of 33 patients who underwent implantation of spheric/aspheric AcrySof ReSTOR IOL at the Samsung Medical Center of Korea were enrolled in the present study. The uncorrected distance visual acuity (UCDVA), best corrected distance visual acuity (BCDVA), and refractive error were recorded preoperatively and three months after surgery. A questionnaire to assess patient satisfaction was created (score range: 1-5, 5 being the maximum score). Patient age, preoperative UCDVA, BCDVA, corneal astigmatism, and asphericity of IOL were selected as preoperative factors influencing patient satisfaction. Results: One hundred percent and 93.9% of the patients achieved UCDVA and BCDVA of 20/25 or better, respectively. The overall patient satisfaction score was 3.9±1.0/4.5±0.7 (p=0.073) and the score of intent to recommend ReSTOR IOL to others was 3.7±1.0/4.5±0.6 (p=0.013) with the spheric/aspheric IOL, respectively. The age of patients was negatively correlated with the score of overall satisfaction and the intent to recommend the procedure to others (p=0.024, 0.031). The overall patient satisfaction and intent to recommend of the patients who were less than 55 years old were significantly higher than those of the older patients (p=0.032, 0.039). Conclusions: High UCDVA and BCDVA resulted from the implantation of ReSTOR IOL. The younger the patients were, the higher the resulting patient satisfaction. Implantation of ReSTOR IOL in young patients is recommended. J Korean Ophthalmol Soc 2010;51(1):14-21
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사용자 추종과 위치 인식 기술을 이용한 스마트 쇼핑 로봇 시스템
윤재하(Jaeha Yoon),강민구(Mingu Kang),김덕일(Duckil Kim),이승수(Seungsoo Lee),이진솔(Jinsol Lee),조기환(Kihwan Cho),박광현(Kwang-Hyun Park) 한국HCI학회 2014 한국HCI학회 학술대회 Vol.2014 No.2
본 논문은 차륜형 로봇의 장점인 이동성을 바탕으로 물체 추종과 위치 인식 기술을 적용한 쇼핑 카트를 다룬다. 기존의 쇼핑 카트는 사용자가 직접 이동시켜야 하므로 일반인은 물론 장애인이나 노약자가 마트에서 쇼핑을 하는데 많은 불편함이 있다. 본 논문은 초음파 센서를 이용한 거리 측정 장치를 구현하여 사용자를 추종하는 추종 모드, 위치인식 센서를 이용하여 설정한 가상의 공간 속에 상품 정보를 저장하고 물품의 위치를 안내해주는 안내 모드, 두 가지 모드를 제공하는 스마트 쇼핑 로봇 시스템을 제안한다. 또한 스마트 폰을 이용한 UI를 제공하여 사용자 편의를 극대화하고 접근성을 높였다. 제안된 시스템은 초음파를 이용한 무선 거리 추종, 위치 인식 센서를 이용한 가상공간 위치 인식, 상품 정보가 저장된 DB로 구성된다. 이 시스템은 엔터테인먼트적인 요소가 겸비된 쇼핑 도우미의 역할을 할 수 있으며, 대형 마트뿐만 아니라 박물관, 전시관 등 안내가 필요한 다양한 곳에 응용할 수 있다. This paper deals with a shopping cart using object tracking and localization technology based on mobility which is an advantage of a wheeled robot. The disabled and the elderly as well as ordinary people may suffer from inconvenience when they shop at a mart since they have to move the existing shopping cart by themselves. This paper suggests a smart shopping robot system that offers two modes: 1) a tracking mode for the robot to follow the user by implementing a distance measurement device using ultrasonic sensors; 2) a guidance mode to save product information in a virtual space created by using a localization sensor and to guide the location of products. In addition, the robot maximizes convenience and enhances accessibility by providing a user interface on a smart phone. The proposed system consists of wireless object tracking using ultrasonic sensors, localization in a virtual space using localization sensors, and a database containing product information. The system can be used as a shopping helper with entertainment aspect and can be utilized not only in a mart but also in various places such as museums and exhibitions, which require guidance.
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축구 시합도중 발생한 정복 불가능한 고관절 골절 탈구 증례보고
윤지열 ( Ji-yeol Yoon ),윤재하 ( Jae-ha Yoon ),최동훈 ( Dong-hun Choi ),최성우 ( Sung-woo Choi ) 국군의무사령부 2011 대한군진의학학술지 Vol.42 No.1
The fracture dislocation of the hip is commonly seen following high energy motor vehicle accidents. The hip fracture-dislocation in soccer game is uncommon. In addition, irreversible cases in soccer related injury are extremely uncommon. Scanty information is published regarding irreducible soccer related hip fracture-dislocation. The cases of hip fracture-dislocation are reported in recreational soccer players caused by low energy mechanisms than motor vehicle accident. However, the same prognostic factors that determine the functional outcome apply to soccer related cases. Hip fracture -dislocation must be treated by emergency. But repeated closed reductions maybe delay the treatment time, complication rate maybe increased. As a result, irreversible cases must be treated by operation as soon as possible.
KCI
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