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고속 IP 주소 검색을 위한 리프-푸싱 이진트라이 기반 비트맵 알고리즘
서지희(Ji-Hee Seo),임혜숙(Hye-Sook Lim) 대한전자공학회 2015 대한전자공학회 학술대회 Vol.2015 No.6
This paper proposes a new IP address lookup architecture using bit maps. The proposed structure is based on bit-maps for a leaf-pushing binary trie. Since internal nodes are not associated with prefixes in the leaf-pushing trie, the search procedure becomes more efficient than the bitmap-based search in a binary trie. Throughout simulation, the proposed architecture has better search performance in the aspect of the average number of memory accesses.
열처리 공정을 이용한 regenerated FBG의 제작
서지희 ( Ji Hee Seo ),이남권 ( Nam Kwon Lee ),이승환 ( Seung Hwan Lee ),김유미 ( Yu Mi Kim ),유윤식 ( Yun Sik Yu ) 한국센서학회 2013 센서학회지 Vol.22 No.2
In this paper, we manufactured the regenerated FBG by the thermal annealing of seed FBG based on UV irradiation. The writing conditions of regenerated FBGs were investigated in four types of optical fiber. FBGs written in H2-free fiber were erased and not regenerated during the thermal annealing. FBG written in H2 loaded Boron co-doped fiber was erased at the temperature of about 580 ℃ and regenerated about 590 ℃. However, the extinction of regenerated FBG started at the temperature over 900 ℃and then FBG disappeared out. FBG written in H2 loaded Ge high doped fiber was erased and regenerated around the temperature of 800 ℃ and maintained until the end of the thermal annealing. The reflection of the regenerated FBG was decreased about 12 dB and the center wavelength of the regenerated FBG was shifted about 0.7 nm compared with that of the seed FBG. The thermal characteristics of the regenerated FBG were analyzed by reheating from room temperature to 980 ℃. As results, the regenerated FBG had survived without a decrease of reflection and the thermal sensitivity was 15 pm℃.
일반아동과 언어학습장애아동의 말하기와 쓰기 과제에 따른 조사 사용 비교 연구
서지희(Ji Hee Seo),김화수(Wha Soo Kim) 한국언어치료학회 2016 한국언어치료학회 학술발표대회 논문집 Vol.2016 No.12
Purpose: Children with language-learning disorder(LLD) demonstrate difficulties with the use of postpositions in speaking and writing. The purpose of this study was to examine the use of postpositions and the errors of postpositions in children with LLD by comparing with that of typically developing children(TD). This study intended to offer useful implications for speech-language pathologists to improve the accuracy of syntax and enrich semantics of children with LLD. Methods: Spoken and written language samples were collected and transcribed from 40 children in Grades 3, 20 LLD and 20 TD. The speaking and writing tasks were both developed by the researchers. The order of each task was counterbalanced across participants. Postpositions in speaking and writing task samples were analyzed using the subtype classification of the postpositions developed by the Ministry of Education. The errors of postpositions were classified into 6 error types determined with reference to previous research. Results: There was no significant difference in the use rate of postpositions between two tasks, but there were significant difference in the use rate of postpositions between TD and LLD groups. However, there were significant differences in the error rate of postpositions both tasks and between groups. Conclusions: As a result of analyzing the use rate and error rate of postpositions, this study found out that children with LLD showed significantly lower the use of postpositions and more errors of postpositions compared with TD. Because the skills of speaking and writing become more important during the school-age years, the future research are needed to search for ways to identify and treat children with LLD.
모바일 애플리케이션에서 인터랙션으로 인한 세렌디피티가 사용자 경험에 미치는 영향
조인성 ( In Seong Cho ),서지희 ( Ji Hee Seo ),이민주 ( Minju Lee ),허소임 ( So Im Hur ),이윤지 ( Yoon Ji Lee ),이효선 ( Hyo Seon Lee ) 한국감성과학회 2015 감성과학 Vol.18 No.4
When product or service provides unexpectedness the user would be satisfied, and lately some mobile applications and web services provide those unexpectedness. However, unexpectedness itself can make negative effects such as decrease of the ease of use, still studies about mobile application are focused on satisfaction from the usability. Therefore, we would study experimentally user experience changes caused by unexpectedness using serendipity in mobile application UX, and observe how those changes to affect to user satisfaction. In other words, we observed the relationship between factors such as the unexpectedness caused by interactions of mobile application, the serendipity provided game, perceived newness, perceived ease of use, perceived usability, and satisfaction. As a result, the serendipity has positive effect to the perceived newness and negative effect to the perceived ease of use, and perceived newness and perceived ease of use affect to perceived usability positively, and all three factors are have positive effects to the use satisfaction.
깔창의 높이에 따른 전후 압력 분포와 좌우 균형에 관한 연구
조덕상,고현곤,차승용,김미리,홍보람,서지희,전미희,송미리,이효숙,김민준,김형수,Jo, Deok-Sang,Goh, Hyun-Gon,Cha, Seung-Yong,Kim, Mi-Ri,Hong, Bo-Ram,Seo, Ji-Hee,Jeon, Mi-Hee,Song, Mi-Ri,Lee, Hyo-Suk,Kim, Min-Jun,Kim, Hyoung-Su 대한물리치료과학회 2012 대한물리치료과학회지 Vol.19 No.1
Purpose : The purpose of this study was to investigate the effect of body balance according to insole height and to provide basic information about body balance by insole height. Method : We examed 40 university students who had healthy body without balance impairment. Plantar pressure was measured by EMED system and the measurement of MTD balance used the MTD-balance master in static stance posture. Both of equipments are various measurement method. We measured plantar pressure and MTD balance each three different height insole(0cm, 3cm, 7cm) and each trial was 30 second in duration. Result : The results were as follows : 1) It showed significantly differences between bare foot and height insole. The anterior plantar pressure with 3cm or 7cm insole were more higher than bare foot(P<.05). 2) There were no significantly differences between barefoot and height insole with MTD-balance master(P<.05). Conclusion : In conclusion, the measurement of MTD balance showed right and left balance ability didn't change by insole height, but plantar pressure was moved on anterior side of foot so we could know insole's height cause the effect to anterior and posterior balance ability.