신생아에서의 HDL-C와 LDL-C 値에 관한 연구

한병길,정용헌 충남대학교 의과대학 지역사회의학연구소 1996 충남의대잡지 Vol.23 No.1

The values of serum HDL-C and LDL-C were measured in 70 newborn infants with gestational ages from 35-43 weeks, birth weight from 2000 to 4500 gm, Apgar score 7 or more at 1 & 5 minutes and normal physical examination. 1. In all newborn infants, the mean HDL-C values & ranges were 31.99 ±6.67 mg/dl, from 21.5 to 49.8mg/dl, and the mean LDL-C values & ranges were 41.42 ±21.39mg/dl from 15.1 to 94.3mg/dl. 2. In term newborns with AGA, the mean HDL-C & LDL-C values were 32.85 ±6.75mg/dl and 45.85 ±21.39mg/dl respectively. 3. The HDL-C and LDI-C values of female were significantly higher than those of male. 4. The correlation of HDL-C by weight for gestational age was not significant, but that of LDL-C value was significantly lower in SGA than those of AGA & LGA. 5. The correlations of HDL-C & LDL-C according to birth weight, gestational age and Ponderal Indices were not significant.

다중 시점 RGB 영상의 심층 합성곱 신경망 기반 3차원 형상 추정 방법

한병길,박종우,서현욱,송성혁 제어·로봇·시스템학회 2022 제어·로봇·시스템학회 논문지 Vol.28 No.7

In this paper, we describe point cloud generation method from multiple RGB images based on convolutional neural network. The proposed method is motivated from human’s 3d understanding from orthographic sketches, which infer spatial relationship from front, top, side view of the 3d object. The network of the proposed method employed generative model, to make it predict point clouds of atypical objects. Auto encoder network is utilized to encode three RGB images into latent vectors, and generate point clouds. Loss functions are defined which measure reconstruction performance and uniformity of the point clouds to make the network generate point clouds similar to the original and distribute uniformly along entire region. From this structure, we expected the network to learn spatial relation of the original 3d model from multiple RGB images. The result shows that the proposed method can predict overall shape of the objects, and it is hard to express detailed geometry. As a further work, network structure improvement to generate detailed shape of the object, predict occluded region will be performed. .

인유(人乳) 흡인 백서의 폐포 대식세포에서 Lactalbumin에 대한 면역세포화학적 연구

한병길,정용헌,Han, Byoung Kil,Chung, Young Hun 대한소아청소년과학회 2003 Clinical and Experimental Pediatrics (CEP) Vol.46 No.6

목 적 : 인유를 탐식한 폐포 대식세포는 면역세포화학 반응에 관여하며, 기존의 염색법에서보다 면역세포화학기법에 의해 잘 관찰될 수 있음을 규명하여, 인유 흡인을 확인할 수 있는 진단에 활용하고자 본 연구를 시행하였다. 방 법 : 총 64마리의 백서를 대상으로 소량(0.05 mL)의 모유를 코를 통하여 기도에 흡인시킨 후 지정 시간별로 기관을 도관한 다음, 기관지폐포 세척을 실시하여 얻은 세포에 대하여 면역세포화학적 염색과 Oil Red O 염색을 실시하고 폐포 대식세포들의 탐식 정도를 관찰하였다. 결 과 : 인유 흡인 2시간 후에 Lactalbumin에 대한 양성 대식세포가 관찰되었으며 8시간에 최고이었고 24시간에 감소하였으며 48시간에도 양성 대식세포가 관찰되었다. 그러나 Oil Red O 염색에서 폐포 대식세포들의 검출률은 미미하였다. 결 론 : 본 실험의 결과는 소량의 인유 흡인을 면역세포화학적 기법에 의하여 기관지폐포 세척 액에서 검출할 수 있다는 것을 시사하는 것이었다. Purpose : Aspiration of foreign material into the lungs can cause acute or chronic pulmonary diseases. It is difficult to detect small amounts of aspiration due to the lack of safe, sensitive and specific diagnostic tests. Recently, in animal or human studies, it has been reported that immunochemistry for lactalbumin can be used to detect the minimal aspiration. So, the authors' investigation was designed to determine whether human milk phagocytized alveolar macrophages can be detected in human milk aspirated mice. Methods : Sixty four male mice, 6-8 weeks old and 30-40 gm weighing, were used for this study. About 0.05 mL of human milk or normal saline were given intranasally once per day for 1 day or 3 days. Under anesthesia with ketamine and xylazine, the trachea of each mouse was cannulated with an 18G Jelco needle and then, each mouse's lungs were lavaged three times with 0.5 mL of phosphate buffer solution at 2, 8, 24, and 48 hours after the last milk or normal saline instillation. Cells in bronchoalveolar lavage fluid were stained with Oil Red O and immunocytochemistry for alpha-lactalbumin. Results : Immunocytochemical reactivity for alpha-lactalbumin or lipid-laden alveolar macrophages were not observed in the normal saline aspirated groups. Immunocytochemical reactivity for alpha-lactalbumin were observed in the human milk aspirated groups. They showed a peak at 8 hours and decreased markedly at 24 hours but persisted even at 48 hours after aspiration. Immunocytochemical stain positive alveolar macrophages were noted similarly in number between single and multiple aspiration groups. Conclusion : These observations suggested that alveolar macrophages for lactalbumin could be more easily detected on immunocytochemistry than Oil Red O stain, and immunocytochemistry could be used as a sensitive and specific diagnostic test for the detection of human milk aspiration.

실시간 응용을 위한 안드로이드 플랫폼에서의 안면 검출 시스템 구현

한병길,임길택 대한임베디드공학회 2013 대한임베디드공학회논문지 Vol.8 No.3

This paper describes an implementation of face detection technology for a real-time application on the Android platform. Java class of Face-Detection for detection of human face is provided by the Android API. However, this function is not suitable to apply for the real-time applications due to inadequate detection speed and accuracy. In this paper, the AdaBoost based classification method which utilizes Local Binary Pattern (LBP) histogram is employed for face detection. The face detection module has been developed by C/C++ language for high-speed image processing, and this module is included to the Android platform using the Java Native Interface (JNI). The experiments were carried out in the Java-based environment and JNI-based environment. The experimental results have shown that the performance of JNI-based is faster than Java-based method and our system is well enough to apply for real-time applications.

가상 물체의 기하학 정보 전달의 향상을 위한 휴대 단말 실감 인터페이스

한병길,김승찬,권동수,최태용,김휘수,경진호,김두형 제어·로봇·시스템학회 2020 제어·로봇·시스템학회 논문지 Vol.26 No.12

. In this paper, we propose a novel three-dimensional interaction system based on a shape-changeable mobile interface. We utilize multiple serially linked line segments to physically collocate virtual objects in real space. More specifically, the proposed system provides users with geometric information by physically enclosing the target virtual object with its outer shape. To this end, we further propose an algorithm that controls each joint of the system, such that the corresponding links are aligned with the virtual surface, based on an active-contour model. An experiment was conducted to verify the proposed interaction scheme, wherein geometric information was provided in the form of mechanical shape change of the interface. Our experimental results indicate that the proposed method is effective as a system for interacting with 3D virtual objects, provided that only a mobile interface is used.

Real-Time License Plate Detection in High-Resolution Videos Using Fastest Available Cascade Classifier and Core Patterns

한병길,이종택,임길택,정윤수 한국전자통신연구원 2015 ETRI Journal Vol.37 No.2

We present a novel method for real-time automatic license plate detection in high-resolution videos. Although there have been extensive studies of license plate detection since the 1970s, the suggested approaches resulting from such studies have difficulties in processing high-resolution imagery in real-time. Herein, we propose a novel cascade structure, the fastest classifier available, by rejecting false positives most efficiently. Furthermore, we train the classifier using the core patterns of various types of license plates, improving both the computation load and the accuracy of license plate detection. To show its superiority, our approach is compared with other state-of-the-art approaches. In addition, we collected 20,000 images including license plates from real traffic scenes for comprehensive experiments. The results show that our proposed approach significantly reduces the computational load in comparison to the other state-of-the-art approaches, with comparable performance accuracy.

PSCAD/EMTDC를 이용한 ±35kV급 MVDC 실증 배전망의 모델링 및 사고특성에 관한 연구

한병길(Byeong-Gill Han),이후동(Hu-Dong Lee),김지명(Ji-Myung Kim),최성문(Sung-Moon Choi),노대석(Dae-Seok Rho) 한국산학기술학회 2022 한국산학기술학회논문지 Vol.23 No.4

최근, 신재생에너지전원의 급격한 도입으로 인한 계통접속 지연 문제를 해결하기 위한 방안으로, MVDC 배전기술에 대한 실증연구가 활발하게 진행되고 있으며, 특히 기존의 AC 배전선로를 활용하여 MVDC 배전망을 구성하는 경우, MVDC ±35kV의 전압이 적정한 것으로 평가되고 있다. 그러나, 이 전압은 기존 AC 배전망의 공급전압보다 높아 MVDC 배전망에서의 전체 사고전류를 크게 증가시킬 수 있으므로, 선로 및 주요설비들을 보호하기 위하여 정확한 사고 특성의 해석이 요구되고 있다. 따라서, 본 논문에서는 MVDC 배전망의 실증을 위해 구축 중에 있는 ±35kV급 MVDC 배전계통을 대상으로 사고특성을 분석하기 위하여, 배전계통 상용 해석 프로그램인 PSCAD/EMTDC를 이용하여 배전용변전소, AC 및 DC 배전선로, 컨버터스테이션, 태양광전원으로 구성된 ±35kV급 MVDC 배전계통의 모델링을 제시한다. 이 모델링과 다양한 상정사고 조건을 바탕으로 ±35kV급 MVDC 배전계통에서의 사고해석을 수행한 결과, 사고 지점 및 종류에 따른 사고특성을 정확하게 평가할 수 있어서, 본 논문에서 제시한 모델링이 MVDC 배전계통의 사고해석에 유용함을 확인하였다. Recently, demonstration projects for a medium voltage direct current (MVDC) distribution system have been carried out as an alternative to overcome the interconnection delay issues of PV systems. When applying existing AC devices and cables to MVDC distribution systems, a voltage of MVDC 35kV has been considered appropriate. However, this voltage is higher than AC 22.9 kV and can significantly increase the overall fault current in the MVDC distribution system, so a proper analysis of fault characteristics is required for the protection of cables and devices. Therefore, this paper proposes a model of a ±35-kV-scale MVDC distribution system, which is composed of a distribution substation, AC and DC distribution feeder, converter station, and PV system. The model was made using PSCAD/EMTDC S/W in order to evaluate the characteristics of fault in the system. Simulations of fault analysis were done based on the proposed model with several fault scenarios, and the results confirmed that fault characteristics can be accurately evaluated depending on the fault types and scenarios.

전기자동차용 이동형 스마트 전원공급장치의 구현에 관한 연구

한병길(Byeong-Gil Han),최성문(Sung-Moon Cho),페레이라 마리토(Marito Ferreira),김미영(Mi-Young Kim),노대석(Dae-SeokRho) 대한전기학회 2020 대한전기학회 학술대회 논문집 Vol.2020 No.10

이동녕의 생애와 구국운동

한병길(Han Byung Kil) 충청남도역사문화연구원 2018 충청학과 충청문화 Vol.24 No.1

이동녕은 전근대적인 전통사회에서 태어나 근대적인 민주사회로 나아가는 서세동점의 격변기를 겪으면서, 온갖 고난과 시련을 극복하고 조국의 개화와 독립을 위해 평생을 헌신한 인물이다. 그는 연안 이씨 명문 사대부 가문에서 태어나 유년시절부터 유학을 배웠으나 성리학을 기반으로 전통을 고수하는 척사사상이 아니라, 실사구시를 지향하는 실학을 바탕으로 중체서용하여 부국강병을 달성하고자 한 개화시장을 수용했다. 그는 1896년 독립협회에 가입하여 개화운동을 통해 서구 열강의 침탈을 경계하면서도 발달한 자본주의 제도와 문화를 받아들여 근대적인 입헌군주제를 수렵하고자 했으나, 공화제로의 내정 개혁을 의심하면서도 방지하려는 황권에 의한 제재와 구금으로 옥고를 겪는다. 이동녕이 본격적으로 개화운동을 실천한 계기는 1898년 제국신문 논설을 집필하면서부터다. 나아가 대한제국민력회 활동을 통해 민족자강, 국민참정권, 의회 개설을 전개했다. 상동청년학원 설립에 참여하여 인재양성과 민족의식을 고양했고, 1905년 을시늑약으로 국권을 빼앗기자 상동청년회의 일원으로 이에 반대하는 상소 투쟁을 하다가 다시 옥고를 겪는다. 1907년 비밀결사인 신민회 창립에 참여하고 청년학우회 활동으로 국권회복을 위해 노력했으나, 1910년 경술국치로 인해 활동이 어려워지자 국외에 독립운동기지를 건설해 독립군 양성으로 전환하게 된다.

忠淸地域 百濟土城의 축조양상

한병길(Han Byoung-geel) 한국고대학회 2003 先史와 古代 Vol.19 No.-

The construction techniques shown in the Baekje walls in the Choongchung Province are characterized by the periods through dating data and historical documents on the excavated artifacts and archaeological remains. The major periods are Hansung Period, Woongjin Period(475-538A.D.), and Sabie Period. The first earthen wall constructed in the Hansung Period is Jungbookdongtosung. In the Woongjin Period, Kongsansung were constructed, and in the Sabie Period, Pusosansung and Dongnasung were constructed in that order. As for the phases of change around the Baekje walls by the periods, the Woongjin Period produced earthen walls without stones at their lowest sides and stones began to appear at the lowest side in the Sabie Period. It seems that there was no stone at the lowest side in the early Sabie Period but they began to be put in some sections during reconstruction at a certain point of time. The following is an outline for restoring the constructional techniques applied to the Baekje earthen walls in the Choongchung Province: Use clay and sandy soil derived from the ditch as chief materials. First, make the clay hard and make foundation layers with it as broad as or broader than the width of wall in the plan. Next, arrange logs for pillar into the central wall. Again arrange logs for pillar outside the area planned for inside assistant wall and pile up clay and sandy soil inside the logs alternately on the support of central wall. The inside assistant wall is relatively less solid than the central wall and the outer lowest part of it was built into the accumulation of gravels to supplement the earthen parts. And finally, arrange another logs for pillar outside the area planned for outside assistant wall and also pile up clay and sandy soil inside the logs alternately on the support of central wall. The outside assistant wall isn't so strong compared with central and inside assistant walls that layer gravels was used for the outer lowest part to supplement the earthen parts.