학교구강보건사업개선을 위한 3년간 추구조사연구

홍지원,마득상,박덕영 대한구강보건학회 1999 大韓口腔保健學會誌 Vol.23 No.5

비중격에 발생한 신경섬유종의 내시경적 비내 수술 치험 1예

홍지원,이준호,박동진,김명구,Hong, Ji-Won,Lee, Jun-Ho,Park, Dong-Jin,Kim, Myung-Gu 대한기관식도과학회 2008 大韓氣管食道科學會誌 Vol.14 No.1

Neurofibroma is a neurogenic tumor arising from schwann cells or peripheral tissues of nerve sheaths. Neurofibroma rarely occurs as a solitary lesion but mostly occurs as part of neurofibromatosis and reports of neurofibromas developed in the nasal cavity or paranasal sinus are very rare. We report on a case of neurofibroma of the nasal cavity treated by endoscopic surgery. Preoperative computed tomography(CT), and punch biopsy suggested that the tumor was benign neurogenic tumor cofined to right nasal cavity. The tumor was removed with endoscopic surgery completely, and confirmed as neurofibroma by histological and immunohistochemical examination. We discuss the clinical and pathological characters of neurofibroma arising in the nasal septum.

악성코드 작성자 그룹 분류를 위한 특징 선택

홍지원,박상현,김상욱 한국정보과학회 2018 데이타베이스 연구 Vol.34 No.1

One of the greatest threats to modern cybersecurity is the existence of malware. The authors of malware are avoiding law enforcement and continuously producing new malware. Classification of malware by author groups can provide useful information for digital forensics. In this paper, we propose feature selection methods to identify more useful features for author group classification among a great number of features extracted from malware. As a result of the feature selection process, we confirm that the feature extraction time, classification model learning time, and classification time were significantly shortened. We also verify that decrease in accuracy is also minimized. 현대의 컴퓨터 보안의 가장 큰 위협 중 하나는 악성코드(malware)의 존재이다. 악성코드의 제작자들은 법망을 교묘히 피하며 지속적으로 악성코드를 제작하고 있다. 악성코드를 저자 그룹에 따라 분류하는 기술은 디지털 포렌식(digital forensic)에 유용한 정보를 제공할 수 있다. 본 논문에서는 악성코드로부터 추출한 다양한 특징 정보들로부터 저자 그룹 판별에 더 큰 도움이 되는 특징들을 선별해 내는 방안을 제안한다. 이러한 선별 작업의 결과 특징 추출 시간 및 분류 모델 학습과 분류에 소요되는 시간을 단축시킬 수 있었음을 실험을통해 확인하였다. 또한 이에 따른 정확도 감소 역시 최소화됨을 증명하였다.

하악골 골절 특성에 관한 임상적 연구

홍지원,정호균,강홍구 중앙대부설한국의과학연구소 1992 한국의과학 Vol.24 No.4

결핵성 신경망막염 1예

홍지원,박영철,최광주,Ji-Won Hong,Young-Chul Park,Gwang-Ju Choi 대한안과학회 2005 대한안과학회지 Vol.46 No.9

Objective: Tuberculosis is a chronic infection caused by Mycobacterium tuberculosis that can appear throughout the entire body; however, intraocular tuberculosis is rare. We report a case of tuberculous neuroretinitis accompanied by periphlebitis. Methods: A 17-year-old female was referred with the diagnosis of retinal vasculitis. In the fundus of her right eye, an edematous disc, serous detachment of the macula, multiple hard exudates, and vascular sheathing around the veins were noted. Also, she had no direct light reflex in her right eye. Although her chest X-ray showed no abnormalities, the Tuberculin test was positive; therefore, the condition was diagnosed with a neuroretinitis accompanied by periphlebitis caused by Mycobacterium tuberculosis. Results: High-dose steroid treatment decreased peripapillary edema but did not improved visual acuity. Treatment with antituberculosis medicine resulted in the recovery of her visual acuity and in fundus changes. Conclusions: Ocular tuberculosis commonly appears as perivasculitis; however, it can cause a visual disturbance by invading the retina and optic nerve simultaneously.

Synthesis and Field-Effect Transistor Behavior of New Oligo-Selenophene Derivatives

홍지원,박종화,안택,심흥구 한국고분자학회 2007 한국고분자학회 학술대회 연구논문 초록집 Vol.2007 No.10

강릉시 초등학교구강보건사업 평가연구

홍지원,이승우,박덕영,마득상 대한구강보건학회 2000 大韓口腔保健學會誌 Vol.24 No.4

The purpose of this study was to evaluate school-based oral health program of suburban area of Kangnung city arid to obtain basic data for improving the efficiency of the program. In 4 elementary schools of suburban area, school-based oral health programs including fluoride mouth rinsing, pit and fissure sealing for first molars and oral health education were started from 1996. Baseline dental examination was done for 535 students in 1996. 212 students who were 6 to 8 years-old in 1996 were examined every May for 3 years. Among these, 157 students were successfully followed for 3 years. The obtained results were as follows: 1. DMFT index was significantly lower in children involved in school-based oral health programs from their first grade school life than those involved from other grades(p<0.05). 2. Dental caries incidence of permanent teeth was the most prevalent in the first molars. 3. The major cause of dental caries incidence was due to failure of follow-up to seal pits and fissures. 4. Resources of school-based oral health programs should be focused to the fast grade students. 5. Detailed directory including the method of planning for programs, criteria for selecting subjects and teeth to be seated should be developed. Also, the method of writing on charts is need to be standardized.

신체활동중심 교육이 유아의 긍정적 자아개념과 친사회적 행동에 미치는 효과

홍지원 숙명여자대학교 교육대학원 원우회 1994 교육논총 Vol.3 No.-

Axenic purification and cultivation of an Arctic cyanobacterium, Nodularia spumigena KNUA005, with cold tolerance potential for sustainable production of algae-based biofuel

홍지원,Han-Gu Choi,Sung-Ho Kang,윤호성 한국조류학회I 2010 ALGAE Vol.25 No.2

A psychrotolerant cyanobacterium, Nodularia spumigena KNUA005, was isolated from a cyanobacterial bloom sample collected near Dasan Station in Ny-Ålesund, Svalbard Islands during the Arctic summer season. To generate an axenic culture, the isolate was subjected to three purification steps: centrifugation, antibiotic treatment and streaking. The broad antibacterial spectrum of imipenem killed a wide range of heterotrophic bacteria, while the cyanobacterium was capable of enduring both antibiotics, the remaining contaminants that survived after treatment with imipenem were eliminated by the application of an aminoglycoside antibiotic, kanamycin. Physical separation by centrifugation and streaking techniques also aided axenic culture production. According to the cold-tolerance test, this mat-forming cyanobacterium was able to proliferate at low temperatures ranging between 15 and 20°C which indicates the presence of cold-tolerance related genes in N. spumigena KNUA005. This suggests the possibility of incorporating cold-resistance genes into indigenous cyanobacterial strains for the consistent production of algae-based biofuel during the low-temperature seasons. Therefore, it is needed to determine the cold-tolerance mechanisms in the Arctic cyanobacterium in the next research stage.

역할극을 통한 참여형 임상실습 만족도 조사

홍지원,김정욱,김영재 大韓小兒齒科學會 2015 大韓小兒齒科學會誌 Vol.42 No.1

본 연구의 목적은 임상실습 역할극을 시행한 후, 학습 참여에 대한 학생들의 만족도를 평가하여 임상실습에 대한 만족도를높이고 효율적인 임상실습 교육을 위한 개선방향을 모색하는데 기초 자료를 제공하는 것이다. 본 연구에 참여한 85명의 치의학전문대학원 학생들은 17조로 나누어 역할극을 시행한 후, 교육 방법으로서의 흥미와 적절성 및 유용성에 대하여 평가하였다. Likert 5단계 평점 척도를 사용하여 5점 만점으로 만족도를 조사한 결과 평균 점수는3.88점이었으며 흥미와 적절성 측면에서 3.99점, 유용성 측면에서는 3.79점이었다. 맡은 역할에 따른 만족도의 차이에서는각 집단 간의 유의한 차이를 나타냈으며 환자 보호자 군에서의 만족도가 가장 높았다. 학생들의 역할극에 대한 만족도가 긍정적이었으며 효율적인 교육이라고 평가하였다. 본 연구를 토대로 광범위하고 지속적인 연구가 진행되어 현행 임상실습을 보완하고 개선한다면 효율적인 임상실습 교육이 이루어질 수 있을 것이다. This study was conducted for the purpose of providing basic data that aims to develop the clinical practiceeducation program and improve satisfaction for clerkship by evaluating the satisfaction of students who participatedin learning using role-play in the clerkship of the department of pediatric dentistry. 85 senior dental students participated in this study. The students were divided into 17 groups and randomlyperformed role-plays in their role. After each role-play, a questionnaire designed to evaluate students’satisfactionon interest and appropriacy and satisfaction on usefulness towards role-play were completed by 77 students. The mean score of total satisfaction was 3.38 on a 5 point Likert scale. The mean score satisfaction on interestand appropriacy was 3.99 and the mean score satisfaction on usefulness was 3.79. The satisfaction score in therole group of parents was the highest and there was a significant difference in mean scores by the role groups (p< 0.05). Students evaluated the role-play as an interesting and useful educational tool in clerkship. It is necessary toundergo further trials and complement programs to upgrade the quality of dental clerkship.