울산지역 초, 중, 고등학생들의 자기 체형에 대한 인식 및 불만족도에 대한 조사

홍찬의,홍성완,정철주,이동진,최광해 영남대학교 의과대학 2008 Yeungnam University Journal of Medicine Vol.25 No.2

Background : In this study, we examined body image perception and dissatisfaction with weight and height in children and adolescents, according to age and body mass index. Additionally, we compared our findings with those of previous studies concerning eating disorders. Materials and Methods : In July and August 2008, 1,501 students were sampled from elementary, middle, and high schools in Ulsan and assessed using self-completion questionnaires. We used the Korean version of the Eating Attitude Test-26 (EAT-26) to screen for eating risk groups Participants were stratified by grade, gender, and body mass index. Results : 1) Dissatisfaction with height, weight, and body image was greater in the older group. 2) Dissatisfaction with weight and body image was greater in the heavier group. 3) EAT-26 scores and the number of individuals at high risk for eating disorders were higher in the female group than in the male group. Conclusion : The EAT-26 score in this study was similar to those found in Previous Westem studies. 2) There were a number of high-risk individuals in the female group, with a tendency toward earlier Presentation. Continuous health management and prevention programs are required.

數種 根管充塡用 sealer의 根管密閉機能에 대한 比較硏究

洪燦義 단국대학교 1987 論文集 Vol.21 No.-

The purpose of the present study was to compare the sealing ability of several root canal sealers commonly used in endodontic therapy. One hundred maxillary anterior canals from artificial Epoxy resin block were employed and prepared to a size 50 K-file in a conventional method. The canals were divided into five groups of twenty each and obturated with the following materials. Z.O.E. cement, Tubliseal, Nogenol, Calcipulpe, and Vitapex. After canal obturation, all the specimens were immersed in 2% Methylene blue dye solution and stored in an incubator at 37℃. At the end of 24 hours, 2 days, 3days, 5days, 7days, 10days, and 14days, ald the specimens were removed from the dye solution in order to evaluate the dye penetration. The sealing ability was evaluated by measuring the distance of dye penetration from the apical foramen into the pulp chamber under a macroscope. The results were as follows; 1. All the tested sealers showed varying degree of dye penetration. 2. All the tested sealers showed increasing pattern in dye penetration over time. 3. Nogenol, Tubliseal, and Vitapex showed a better sealing ability than Z.O.E cement or Calcipulpe. 4. Nogenol showed the best sealing ability among the tested sealers, and Calcipulpe showed the worst within 2 weeks. 5. Vitapex showed nearly the same sealing ability as Tubliseal.

鼻毛의 白毛發生에 의한 年齡推定

김진국,홍석찬,진정언,박의우,김동욱 大韓法醫學會 1999 대한법의학회지 Vol.23 No.1

The gray vibrissae of Korean males(n= 189) between 15 and 75 years old and females(n=111) between 15 and 74 years old whop visited the department of otorhinolaryngology, Konkuk university Chungju hospital during 1996 to 1998, were counted for the purpose of estimating approximate age range in individuals of unknown age. The lowest age appearing gray hairs in both sexes was 15-year-old. The Pearson's correlation coefficient in both sexes was 0.490 (p<0.01). The age appearing gray vibrissae in females was slightly earlier than that of males, however, the differences between right and left sides of nasal cavity were insignificant. This method of counting gray vibrissae would be useful to estimate age range in personal identification together with other methods available until now.

만삭 신생아의 기흉

최우경,홍찬의,이동진,허남진,이영환 영남대학교 의과대학 2005 Yeungnam University Journal of Medicine Vol.22 No.2

Background: This study was performed to evaluate the incidence and clinical characteristics of symptomatic pneumothorax in the full-term neonate. Materials and Methods: We retrospectively reviewed the medical records of 32 symptomatic pneumothorax patients in the full term neonates who admitted to the neonatal intensive care unit in Ulsan Dong Kang General Hospital from January, 2000 to December, 2004. The subjects were divided into two groups according to underlying causes; spontaneous pneumothorax group and secondary pneumothrax group, then each clinical characteristics were assessed. Result: Spontaneous pneumothorax patients were 10(31%) and secondary pneumothorax patients were 22(69%). Overall incidence of spontaneous pneumothorax was 0.4%. Most common cause of secondary pneumothorax was pneumonia. Twelve causes(54.5%) among secondary pneumothorax patients were associated with mechanical ventilator care. Clinical characteristics, courses and managements were similar between two groups, but more shorter duration of admission and chest-tube insertion in spontaneous pneumothorax group Conclusion: The patient with symptomatic pneumothorax needs careful observation and proper management with or without underlying respiratory diseases

벡터제어를 이용한 표면형 영구자석 동기전동기의 최대효율제어

이진,김의선,홍형표,최찬학 木浦大學校 工業技術硏究所 1992 工業技術硏究誌 Vol.2 No.-

In general, surface type permenent magent synchronous motor is controlled by the i_d=0 control method for producing maximum torque per ampere below the rated speed. And it is controlled by the field-weakening control method in order to expand the operating speed limits. However, these control methods do not consider the efficiency. So it is required to minimize the loss. This paper proposes a maximum efficiency control algorithm for surface type permanent magnet synchronous motors. The proposed maximum efficiency algorithm is derived from minimizing the core loss and copper loss. In this method the optimum d-axis current is supplied by the vector controller which solves the maximum efficiency control algorithm. From the computer simulation and experimental results. the improvement of the efficiency with the proposed control system was confirmed.

Sex classification of tick nymphs using vitellogenin

Chan-Eui Hong,Dae Kwon Song,Jun Yang Jeong,Yong Tae Kim,Ziwei Liu,Hyeonjun Shin,Hyeok Lee,Min Kyu Sang,Jie eun Park,Hongray Howrelia Patnaik,Bharat Bhusan Patnaik,Yong Seok Lee 한국응용곤충학회 2023 한국응용곤충학회 학술대회논문집 Vol.2023 No.04

그룹 집중 기술로 개선된 Trans-Unet기반 단일 영상 연무제거 신경망

홍찬의(Chan Eui Hong),최현덕(Hyun Duck Choi) 대한전자공학회 2022 전자공학회논문지 Vol.59 No.6

최근 컴퓨터 비전 기술이 발달하면서, 자율주행 분야에서 인공지능 기반 object detection, image segmentation 등의 컴퓨터 비전기술들이 주목받고 있다. 그러나 이러한 기술들은 야간이나 폭우, 안개 등 기후 악조건 주행환경에서는 영상 손실문제로 인해 성능이 급격하게 저하되고, 이는 치명적인 인명피해를 야기시킬 수 있다. 본 논문에서는 이러한 영상 악조건 속에서도 강인한 컴퓨터 비전기술을 확보하기 위해 Group Attention Block (GAB)을 제안하고 이를 Unet 구조와 Vision Transformer에 적용한 새로운 영상 연무제거 모델을 제안한다. 기존의 CNN(Convolution Neural Network)기반 encoder, decoder와 skip connection이 적용된 Unet구조를 통해 영상의 공간적인 정보를 활용한 특징맵을 추출하고 GAB를 적용하여 특징맵을 강화하며, 여기에 Vision Transformer를 추가 적용함으로써 inductive bias를 줄여 글로벌한 정보에서도 영상의 손실이 없도록 개선하였다. 제안하는 신경망 구조는 이전에 연구된 image dehazing 모델에 비해 PSNR(Peak Signal-to-Noise Ratio)과 SSIM(Structural Similarity Index Measure)에서 개선된 결과를 나타냄을 보여준다. With the recent development of computer vision technology, computer vision technologies such as artificial intelligence-based object detection and image segmentation are attracting attention in the field of autonomous driving. However, these technologies degrade performance due to image loss in driving environments under adverse weather conditions such as nighttime, heavy rain, and fog, which can cause fatal human casualties. In this paper, we propose a novel Group Attention Block (GAB) and a haze removal model combined with the Unet and Vision Transformer in order to get robust computer vision technologies even in such adverse image conditions. This network can capture the image feature with spatial information by CNN layer as well as capture global relations without inductive bias through Vision Transformer. Finally, GAB enhances these functions and helps the decoder to restore the clean image. The simulation results show an improvement in dehazing by PSNR (Peak Signal-to-Noise Ratio) and SSIM (Structural Similarity Index Measure) score compared to the previous image dehazing models.

數種 根管充塡材의 根端部 邊緣漏出에 관한 實驗的 硏究

洪燦義(Chan Eui Hong) 대한치과의사협회 1986 대한치과의사협회지 Vol.24 No.4

호모그래피를 이용한 카메라 위치 및 자세 추정

홍승찬(Seung-Chan Hong),서홍덕(Hong-Deok Seo),김의명(Eui-Myoung Kim) 대한공간정보학회 2024 한국공간정보학회 학술대회 Vol.2024 No.5

Identification of gene targets eliciting improved alcohol tolerance in <i>Saccharomyces cerevisiae</i> through inverse metabolic engineering

Hong, Min-Eui,Lee, Ki-Sung,Yu, Byung Jo,Sung, Young-Je,Park, Sung Min,Koo, Hyun Min,Kweon, Dae-Hyuk,Park, Jae Chan,Jin, Yong-Su Elsevier 2010 Journal of biotechnology Vol.149 No.1

<P><B>Abstract</B></P><P>The economic production of biofuels from renewable biomass using <I>Saccharomyces cerevisiae</I> requires tolerance to high concentrations of sugar and alcohol. Here we applied an inverse metabolic engineering approach to identify endogenous gene targets conferring improved alcohol tolerance in <I>S. cerevisiae</I>. After transformation with a <I>S. cerevisiae</I> genomic library, enrichment of the transformants exhibiting improved tolerance was performed by serial subculture in the presence of iso-butanol (1%). Through sequence analysis of the isolated plasmids from the selected transformants, four endogenous <I>S. cerevisiae</I> genes were identified as overexpression targets eliciting improved tolerance to both iso-butanol and ethanol. Overexpression of <I>INO1</I>, <I>DOG1</I>, <I>HAL1</I> or a truncated form of <I>MSN2</I> resulted in remarkably increased tolerance to high concentrations of iso-butanol and ethanol. Overexpression of <I>INO1</I> elicited the highest ethanol tolerance, resulting in higher titers and volumetric productivities in the fermentation experiments performed with high glucose concentrations. In addition, the <I>INO1</I>-overexpressing strain showed a threefold increase in the specific growth rate as compared to that of the control strain under conditions of high levels of glucose (10%) and ethanol (5%). Although alcohol tolerance in yeast is a complex trait affected by simultaneous interactions of many genes, our results using a genomic library reveal potential target genes for better understanding and possible engineering of metabolic pathways underlying alcohol tolerance phenotypes.</P>