외상성 주관절 변형과 동반된 지연성 척골 신경마비의 치료

이화성,김호태,송석환 대한골절학회 1998 대한골절학회지 Vol.11 No.2

Thirty-five patients with tardy ulnar nerve palsy caused by cubitus valgus (33 cases) and varus (2 cases) deformities were retrospectively studied. All patients had a history of old fracture on the distal humerus during childhood. The mean interval between the previous fractures and the onset of ulnar neuropathy was 19 years. The severity of nerve palsy was classified as McGowan's grade I in 24 patients, grade II in 8 patients, and grade III in 3 patient.. The mean carrying angle was average 29 degrees in 33 cases with cubitus valgus and it was decreased to average 11 degrees postoperatively, hut the angle was average -23 degrees preoperatively in 2 cases with cubitus varus and it was corrected to average 9 degrees postoperatively. The cause of palsy was analysed by mechanical stretching in 11 cases, compression by a fibrous band between the two heads of flexor carpi ulnaris in 8 cases, and diffuse fibrous adhesion around the ulnar tunnel in 5 cases, All patients was treated with supracondylar closing wedge osteotomy accompanied with anterior ulnar nerve transposition in l3 patients, corrective osteotomy only in 12 patients, and anterior ulnar nerve transposition only in 10 patients. Their end results were analysed as good in 24 cases, fair in 8 cases, and poor in 3 cases within average 6 months after the operations (4 to 13 months). The poor results was obtained in 3 cases out of 9 cases with corrective osteotomy group (33.3%). Conclusively, a tardy ulnar nerve palsy caused by post-traumatic elbow deformities should be corrected with anterior ulnar nerve transposition with or without corrective closing wedge osteotomy hut not by corrective osteotomy only, because of compressive neuropathy by diffuse fibrous adhesion or bands of two heads of FCU around the ulnar tunnel in elbow.

Engineering Charge Density Modulation to Optimize Organic Transistor Performances

이화성 한국공업화학회 2021 한국공업화학회 연구논문 초록집 Vol.2021 No.0

Efficient Patterning and Structural Optimization of Soluble Acene for high-Performance Organic Transistors

이화성,조길원 한국고분자학회 2009 한국고분자학회 학술대회 연구논문 초록집 Vol.2009 No.4

지역 커뮤니티 활성화를 위한 공공도서관 공간특성에 따른 이용자행태에 관한 연구

이화성,김용승 한국문화공간건축학회 2022 한국문화공간건축학회논문집 Vol.- No.78

In recent years, the role of public libraries has changed from an educational space into a cultural center of the local community. Accordingly, the study seeks to find the characteristics of spatial configuration in the recent libraries, using the method of user behavior observation of the selected public libraries. In advance of the investigation, the study reviewed preceding research and made a general view on the selected libraries. After the observation, the study analyzed the relationships between user behavior and spatial qualities of public libraries. The findings emphasize two major spatial changes. One is that the chosen libraries had experienced the functional alteration in spatial configurations from data-centered to user-centered. The other is that they had reflected the cultural requirements of the local residents in their spatial composition. The study expects to be used for architectural planning and further research of public libraries.

알레르기성 비염의 임상적 고찰

이화성,장경희,박용수,윤희로 釜算慶南耳鼻咽喉科學會 1991 임상이비인후과 Vol.2 No.2

웹서버 로그 데이터의 이상상태 탐지 기법

이화성,김기수,Lee, Hwaseong,Kim, Ki Su 한국정보통신학회 2019 한국정보통신학회논문지 Vol.23 No.10

현재 웹 환경은 정보 공유와 비즈니스 수행을 위해 보편적으로 사용되고 있는 영역으로 개인 정보 유출이나 시스템 장애 등을 목표로 하는 외부 해킹의 공격 타켓이 되고 있다. 기존의 사이버 공격 탐지 기술은 일반적으로 시그니처 기반 분석으로 공격 패턴의 변경이 발생할 경우 탐지가 어렵다는 한계가 있다. 특히 웹 취약점 기반 공격 중 삽입 공격은 가장 빈번히 발생하는 공격이고 다양한 변형 공격이 언제든 가능하다. 본 논문에서는 웹서버 로그에서 정상상태를 벗어나는 비정상 상태를 탐지하는 이상상태 탐지 기법을 제안한다. 제안된 방법은 웹서버 로그 내 문자열 항목을 머신러닝 기반 임베딩 기법으로 벡터로 치환한 후 다수의 정상 데이터와 상이한 경향성을 보이는 비정상 데이터를 탐지하는 머신러닝 기반 이상상태 탐지 기법이다. Currently, the web environment is a commonly used area for sharing information and conducting business. It is becoming an attack point for external hacking targeting on personal information leakage or system failure. Conventional signature-based detection is used in cyber threat but signature-based detection has a limitation that it is difficult to detect the pattern when it is changed like polymorphism. In particular, injection attack is known to the most critical security risks based on web vulnerabilities and various variants are possible at any time. In this paper, we propose a novelty detection technique to detect abnormal state that deviates from the normal state on web-server log dataset(WSLD). The proposed method is a machine learning-based technique to detect a minor anomalous data that tends to be different from a large number of normal data after replacing strings in web-server log dataset with vectors using machine learning-based embedding algorithm.

주제발표 6 : 차터 스쿨

이화성,김복영(토론자) 한국교육실천연구학회(한국교육포럼) 2004 한국교육포럼 학술대회 자료집 Vol.- No.-

Preparation and Characterization of Alpha-Tricalcium Phosphate Cements Incorporated with Polyamino acids

이화성,권순용,서은미,김용희,김성수 한국고분자학회 2011 Macromolecular Research Vol.19 No.1

Polymeric calcium phosphate cements (PCPCs) derived from biodegradable polyamino acids, such as polyaspartic acid (PAA) and poly-γ-glutamic acid (γ-PGA), were prepared in an attempt to improve their cohesion strength and injectability. The characteristics of the calcium phosphate cements (CPCs), such as dynamic viscosity, paste injectability, initial setting time, compressive strength and cell compatibility, were assessed. The dynamic viscosity increased significantly with γ-PGA incorporation but decreased with PAA incorporation. The injectability increased with the concentration of polyamino acids and that of the CPCs mixed with γ-PGA reached 94%. The initial setting time decreased with the γ-PGA concentration in the cement liquid and reached approximately 10-15 min when the γ-PGA concentration was 1-2 wt%. The compressive strength (CS) of CPCs after 1 week-incubation decreased with the incorporation of PAA and γ-PGA. γ-PGA incorporation deteriorated the CS more than PAA incorporation because the dissolution of alpha-tricalcium phosphate (α-TCP) was retarded. Saos-2 cells grown on CPCs with polyamino acids spread more than those grown on the CPC without them.

2010 교과서 선진화 방안 개요

이화성 한국교과서연구재단 2010 敎科書硏究 Vol.- No.59

일부 초등학생의 비만도에 따른 칼슘과 철의 섭취상태와 혈청 농도에 관한 연구

이화성,김은영,배윤정,승정자 숙명여자대학교 건강·생활과학연구소 2006 生活科學硏究誌 Vol.- No.22

The purpose of this study was to evaluate the nutrition status of calcium and iron in 116 elementary school students with different obesity index. Subjects were assigned to under weight, normal weight or over weight group according to the their obesity index. Their nutritional status, serum calcium and iron levels were evaluated based on 24-recall dietary recalls, anthropometric measurements and blood analysis. The mean height, weight, obesity index and blood pressure of total subjects were 150.4 cm, 45.5 kg, 5.8% and 118.2/76.8 mmHg. The mean % of body fat, SBP and WHR were higher while LBM and TBW were lower in over weight subject than those of other group. The iron intake of overweight was lower than that of underweight and normal subjects(p<0.05) and average calcium intakes were only 50% and 60% respectively of the RDA for Korean. Serum calcium and iron levels of a three groups were within the normal range. There were no significant differences in serum calcium and iron concentrations among three groups, however those of underweight group were a slightly lower than those of other two groups. There were significantly negative correlations between iron of intake and weight, obesity index, systolic pressure and body fat percent. Systolic blood pressure was negatively correlated to the intakes of energy, carbohydrate and protein. Energy intake was also negatively correlated to serum iron. To summarize the results, calcium and iron intakes should be supplied to elementary school students, especially those who were overweight. These indicated that overweight group had improper mineral nutrition status. Therefore, nutrition education and profound studies from many different focus for overweight groups are highly required.