건강코너 - 위대한 예술품은 모방하지 않는다

황경하,Hwang, Gyeong-Ha 대한산업안전협회 2001 안전기술 Vol.39 No.-

새로운 방법을 이용한 Tie-Over Dressing

황경하,김진환,최준,박재현 大韓成形外科學會 1998 Archives of Plastic Surgery Vol.25 No.5

The most important basic requirements for successful skin grafting are the accurate approximation of the edge of the skin graft to that of the wound and the application of even pressure to the graft by a carefully designed dressing. Pressure dressing is indicated for the protection of the graft and the prevention of shearing between the graft and its bed. One of the most widely used methods of pressure dressing is tie-over dressing. The traditional technique is based on the application of long silk sutures along the margin of the graft that are tied over bolus of antibiotics oint-impregnated nonadherent fluffed gauze. With the traditional tie-over dressing, it is impossible to inspect the graft bed for possible hematoma and seroma during the application of dressing. So we adopted another modification of the previously described tie-over dressing methods. From January 1997 to July 1997, we had performed 27 skin graft surgeries and 8 subdermal shavings in 35 patients with our new method of tie-over dressing. We can apply even pressure to the grafts by twisting the long silk sutures instead of typing. In comparison with the plethora of devices and techniques described previously in tie-over dressing construction, our technique offers simplicity and reliable fixation of the graft to the bed and allows further adjustment of the dressing by individual tightening of the threads. Other particularly attractive features are the ability to inspect the graft at any time with little difficulty and the reapplicability of tie-over dressing with the remaining long threads if needed.

소이증 재건의 이개 거상술에 대한 임상적 고찰

황경하,오갑성,김진오,백세민,백롱민 大韓成形外科學會 1998 Archives of Plastic Surgery Vol.25 No.5

The basic technique for total reconstruction of the microtia was established by Tanzer, who utilized autologous rib cartilages for constructing the auricular framework. In order to decrease the number of surgical stages and to achieve maximal convolution, we employed a surgical procedure with simultaneous three layered costal cartilage grafting for the high profiled auricle, concha formation and lobule rotation. However, we performed ear elevation as an additional procedure for some patients who had decreased helical height due to absorption of cartilage framework or postoperative trauma and who had wanted to wear the spectacles or to have more natural appearance of auriculocephalic sulcus. From August 1988 to October 1997 we had performed surgeries for the ear elevation of 58 patients in 177 patients with total ear reconstruction, using various elevation methods; skin graft, local flap, and local with costal cartilage block. When the ear elevation was performed with skin graft, postoperative contraction of the grafted skin was inevitable. In cases with two skin flaps, it was difficult to stabilize and maintain the correct projection of the constructed ear. So we elevated the reconstructed ear by utilizing a costal cartilage block, two skin flaps to cover the posterior region and skin graft. We conclude that the local flap with costal cartilage block is one of the most favorable methods in ear elevation which can maintain the adequate projection and make natural looking auriculocephalic sulcus.

유아 영재교육에 대한 유아교사의 개념도 분석

황경하(Hwang, Kyoung Ha),이새별(Lee, Sae Byeol),황희숙(Hwang, Hee Sook) 한국창의력교육학회 2018 창의력교육연구 Vol.18 No.2

본 연구는 Nobak과 Gowin(1984)이 고안한 개념도를 사용하여 유아교사의 유아 영재교육에 대한 개념과 개념의 수준을 분석하고자 하였으며 다음과 같은 연구문제를 설정하였다. 첫째, 유아교사의 개념도에 나타난 유아 영재교육에 대한 개념의 내용은 어떠한가? 둘째, 유아교사의 개념도에 나타난 유아 영재교육에 대한 개념의 수준은 어떠한가? 이를 위해 부산광역시 유아교육기관에 재직 중인 유아교사 138명을 대상으로 소그룹 면담을 통해 유아 영재교육에 대한 개념도를 작성하도록 하고 이를 분석하였다. 연구결과 첫째, 유아교사의 유아 영재교육에 대한 상위개념은 총 16개의 범주로 도출되었다. 둘째, 종속개념의 수는 영재 교육방법이 가장 많았으며 특성점수는 영재 교육방법, 영재의 인지적 특성, 영재 교육과정 영역 순으로 높게 나타났다. 셋째, 밀도는 0.75-9.33이며 평균은 2.05로 나타났다. 이러한 연구결과는 유아 영재교육에 대한 심층적 이해를 도울 수 있는 교사교육이 필요함을 시사한다. The purpose of this study was to examine early childhood teachers’ knowledge and the level of their knowledge on the contents of gifted young children education. Following questions are developed in order to perform this study. 1. How is the knowledge of early childhood teachers about gifted young children education? 2. How is the level of knowledge of early childhood teachers about gifted young children education? The subjects were 138 early childhood teachers and they were asked to draw a concept map. The findings of the study were as follows: First, there were 16 superordinate concepts of the gifted young children education for early childhood teachers. Second, the highest subcategory was ‘gifted teaching methods’, followed by ‘cognitive characteristics of the gifted children’ and ‘gifted education curriculum’, and the highest specificity measure was ‘gifted teaching methods’ followed by ‘cognitive characteristics of the gifted children’ and ‘gifted education curriculum’. Third, The density degree ranged between 0.75-9.33 and the mean was 2.05. The results were discussed in relation to implications for early childhood teacher education.

등전위 교번식 직류전위차법의 신호 정밀도 검증을 통한 배관 감육 진단 기술에의 적용성 검증

류경하(Kyung Ha Ryu),황일순(Il Soon Hwang),김지현(Ji Hyun Kim) 한국비파괴검사학회 2008 한국비파괴검사학회지 Vol.28 No.2

Effect of Oxide Film on ECT Detectability of Surface IGSCC in Laboratory-Degraded Alloy 600 Steam Generator Tubing

이태현,류경하,김홍덕,황일순,김지현,이민호,최성열 한국원자력학회 2019 Nuclear Engineering and Technology Vol.51 No.5

Stress corrosion cracking (SCC) widely found in both primary and secondary sides of steam generator(SG) tubing in pressurized water reactors (PWR) has become an important safety issue. Using eddycurrenttests (ECTs), non-destructive evaluations are performed for the integrity management of SGtubes against intergranular SCC. To enhance the reliability of ECT, this study investigates the effects ofoxide films on ECT’s detection capabilities for SCC in laboratory-degraded SG tubing in high temperatureand high pressure aqueous environment.

Choi Hair Transplanter를 이용한 단인모발

박재석,이승재,황경하,최준,박재현 大韓成形外科學會 2000 Archives of Plastic Surgery Vol.27 No.2

The transplantation of a large number of hair graft has become an important method in hair restoration surgery and reconstruction of pubic hair and eyebrows. Between September 1996 and December 1998, single hair graft using Choi hair transplanter was performed for 22 patients with male pattern baldness, 8 patients with alopecia of pubis, 6 patients with alopecia of eyebrows ranging from 20 to 59 years of age. Usually between 1000 and 1500 single hair grafts per session are performed on male pattern baldness, between 350 and 500 grafts on alopecia of pubis, between 150 and 250 grafts on alopecia of eyebrows. All procedures were done under intravenous sedation and local anesthesia. A donor horizontal ellipse of scalp is harvested from the occipital area. Questionaires regarding cosmetic satisfaction, side effects and general efficacy of hair transplantation were recorded by patients themselves one year after surgery. The procedure has been proved to be safe and patients can expect aesthetically satisfactory results. No serious complications were reported. The complications including facial edema, temporary sensory change on the donor site, and folliculitis were observed and resolved spontaneously. The use of single hair graft using Choi hair transplanter for the correction of male pattern baldness, alopecia of pubis and alopecia of eyebrows has been proven as one of safe and effective method in obtaining excellent results.

의무기록의 다각적 활용을 통한 충실도 높은 병원 암등록 체계의 구축: 서울아산병원의 경험

김화정,조진희,유용만,이선혜,황경하,이무송,Kim, Hwa-Jung,Cho, Jin-Hee,Lyu, Yong-Man,Lee, Sun-Hye,Hwang, Kyeong-Ha,Lee, Moo-Song 대한예방의학회 2010 예방의학회지 Vol.43 No.3

Objectives: An accurate estimation of cancer patients is the basis of epidemiological studies and health services. However in Korea, cancer patients visiting out-patient clinics are usually ruled out of such studies and so these studies are suspected of underestimating the cancer patient population. The purpose of this study is to construct a more complete, hospital-based cancer patient registry using multiple sources of medical information. Methods: We constructed a cancer patient detection algorithm using records from various sources that were obtained from both the in-patients and out-patients seen at Asan Medical Center (AMC) for any reason. The medical data from the potentially incident cancer patients was reviewed four months after first being detected by the algorithm to determine whether these patients actually did or did not have cancer. Results: Besides the traditional practice of reviewing the charts of in-patients upon their discharge, five more sources of information were added for this algorithm, i.e., pathology reports, the national severe disease registry, the reason for treatment, prescriptions of chemotherapeutic agents and radiation therapy reports. The constructed algorithm was observed to have a PPV of 87.04%. Compared to the results of traditional practice, 36.8% of registry failures were avoided using the AMC algorithm. Conclusions: To minimize loss in the cancer registry, various data sources should be utilized, and the AMC algorithm can be a successful model for this. Further research will be required in order to apply novel and innovative technology to the electronic medical records system in order to generate new signals from data that has not been previously used.

불균일 안개 합성을 이용한 딥러닝 기반 안개 영상 깊이 추정

최영철,백지현,주광진,이동건,황경하,이승용 (사)한국컴퓨터그래픽스학회 2022 컴퓨터그래픽스학회논문지 Vol.28 No.3

Image depth estimation is a technology that is the basis of various image analysis. As analysis methods using deep learning models emerge, studies using deep learning in image depth estimation are being actively conducted. Currently, most deep learning-based depth estimation models are being trained with clean and ideal images. However, due to the lack of data on adverse conditions such as haze or fog, the depth estimation may not work well in such an environment. It is hard to sufficiently secure an image in these environments, and in particular, obtaining non-homogeneous haze data is a very difficult problem. In order to solve this problem, in this study, we propose a method of synthesizing non-homogeneous haze images and a learning method for a monocular depth estimation deep learning model using this method. Considering that haze mainly occurs outdoors, datasets mainly containing outdoor images are constructed. Experiment results show that the model with the proposed method is good at estimating depth in both synthesized and real haze data. 영상의 깊이 추정은 다양한 영상 분석의 기반이 되는 기술이다. 딥러닝 모델을 활용한 분석 방법이 대두되면서, 영상의 깊이추정 분야 또한 딥러닝을 활용하는 연구가 활발하게 이루어지고 있다. 현재 대부분의 딥러닝 영상 깊이 추정 모델들은 깨끗하고 이상적인 환경에서 학습되고 있다. 하지만 연무, 안개가 낀 열악한 환경에서도 깊이 추정 기술이 잘 동작할 수 있으려면 이러한 환경의 데이터를 포함하여야 한다. 하지만 열악한 환경의 영상을 충분히 확보하는 것이 어려운 실정이며, 불균일한 안개 데이터를 얻는 것은 특히 어려운 문제이다. 이를 해결하기 위해, 본 연구에서는 불균일 안개 영상 합성 방법과 이를활용한 단안 기반의 깊이 추정 딥러닝 모델의 학습을 제안한다. 안개가 주로 실외에서 발생하는 것을 고려하여, 실외 위주의데이터 세트를 구축한다. 그리고 실험을 통해 제안된 방법으로 학습된 모델이 합성 데이터와 실제 데이터에서 깊이를 잘 추정하는 것을 보인다.

모바일 학생증을 이용한 아두이노 기반의 출입통제 시스템

양성민 ( Seong-min Yang ),황경하 ( Kyung-ha Hwang ),금진수 ( Jin-soo Keum ),이지수 ( Ji-su Lee ),전중남 ( Joong-nam Jeon ) 한국정보처리학회 2014 한국정보처리학회 학술대회논문집 Vol.21 No.2

본 시스템은 스마트폰 어플리케이션과 아두이노 보드, 웹서버로 구성된 시스템으로서, 학생들이 보다 편리하게 교내 건물에 출입 할 수 있게 하기 위해서 개발하였다. 학생들이 플라스틱 카드로 만들어진 학생증 없이도 스마트폰 어플리케이션으로, 교내 건물에 출입 할 수 있는 기능을 제공함으로써 많은 플라스틱 카드를 대체할 것으로 생각된다. 이를 통해 플라스틱 카드를 따로 가지고 다니지 않아도 되는 편의성을 제공하며 학생증 분실 위험도 막을 수 있다. 또한 플라스틱 카드 제작을 줄여 친환경의 Green IT를 실현할 수 있다. 학생인증 방법은 스마트폰 어플리케이션에서 종합정보시스템 상의 학번과 비밀번호를 입력하면 서버에서 일치 여부를 확인하여 로그인 승인을 해준다. 이후 블루투스 통신을 통해 아두이노 보드에 출입 요청을 보내면 아두이노 보드에 연결된 모터로 문을 개폐한다. 이외에 학생증의 본래 기능인 학생 증명 기능과 학생증으로 이용할 수 있는 제휴업체의 정보도 제공한다.