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장종성 ( Jong Sung Jang ),정광식 ( Kwang Sik Chung ),손진곤 ( Jin Gon Shon ) 한국정보처리학회 2005 한국정보처리학회 학술대회논문집 Vol.12 No.1
다중서명에서는 보안적 요소뿐만 아니라 다중서명의 길이, 다중서명의 생성 및 검증 시간, 복호화 시간, 통신량 등도 중요한 요소이다. 기존의 RSA를 그대로 이용한 RSA 원형 다중서명 방식과 RSA를 변형하여 적용한 RSA 변형 다중서명 방식은 다중서명의 생성 및 검증 시간이 각각의 개인서명을 생성하고 검증하는 시간의 합과 비례하여 증가한다는 문제점이 있다. 본 논문은 서명자의 수만큼 분할된 각각의 부분메시지에 대해 RSA 방식을 이용하여 제각기 서명하는 다중서명 방식을 제안한다. 제안된 메시지 분할을 이용한 RSA 다중서명 방식은 블록의 수가 증가하지 않는 경우 기존 방식에 비해 다중 서명의 길이가 증가하지 않으면서, 다중서명의 생성 및 검증 시간이 각각 □로 감소하고, 복호화 시간과 통신량은 각각 약 □~ □로 감소한다.
ABR-2000상의 변화를 통해 본 궁도요법의 효과연구
이제영(Je Young Lee),장종성(Jong Sung Jang) 대한의료기공학회 2003 醫療氣功 Vol.7 No.1
Objective : This study is perfomed to evaluate the effect of Archery therapy by means of data measured from ABR-2000. Method : Among the outpatients who visited Wolgot oriental medicine clinic from 1, June 2003 to 28, June 2003, I selected 30 persons. they were divieded into two groups. One group was patients pretreated with Archery therapy and the other was patients after treated Arhery therapy. Before and after Archery therapy, I measured the outcome from ABR-2000. Consideration : I studied Archery therapy a point of oriental medicine. And also I studied between modern times and archery. Results : Patients before and after Archery therapy, there were significant differences. Conclusion : This result indicated that the Archery therapy was effective and so the more study is needed continuously.
박상영,김중선,김중휘,이인희,장종성,서태수,Park, Sang-Young,Kim, Chung?Sun,Kim, Joong?Hwi,Lee, In?Hee,Jang, Jong?Sung,Seo, Tae?Soo 대한물리치료학회 2011 대한물리치료학회지 Vol.23 No.1
Purpose:This study was designed to investigate difference in isokinetic muscle strength in the knee extensor muscle and characteristic differences in muscle strength between males and females through the ankle joint angles. Methods: Seventy-four subjects participated in this study. There were two groups: 36 males and 38 females. The mean age of the men was 24.58 years and women was 23.74 years. Subjects were seated on a CON-TREX LP (leg press) lean to back of chair, and there bodies were fixed by straps with the hip joint at an angle of $130^{\circ}$. After randomly fixing the ankle joint at $0^{\circ}$, $20^{\circ}$, and $40^{\circ}$ of plantar flexion (PF) in range of full extension of knee joint. We studied force max average, force max average/kg, power average, and total work through the angle of the ankle joint when the knee joint was extended from $90^{\circ}$ to $180^{\circ}$. Results: In the male group, all maximum measured value showed at the ankle joint $0^{\circ}$, all minimum measured value showed at $40^{\circ}$ PF (p<0.01). In the female group, all maximum measured value showed at the ankle joint $20^{\circ}$ PF, especially the power average increased significantly. All minimum measured value showed $40^{\circ}$ PF (p<0.01). Conclusion: There are differences between males and females in isokinetic muscle strength of the knee extensor through ankle joint angles in healthy adults. Males and Females have different characteristics of muscle strength through the ankle joint angles.
아기띠와 슬링 착용이 체간과 하지의 근활성 및 족저압에 미치는 영향
육군창 ( Goon Chang Yuk ),박래준 ( Rae Joon Park ),이현영 ( Hyun Young Lee ),이명희 ( Myoung Hee Lee ),이전형 ( Jeon Hyeong Lee ),국중석 ( Jung Seok Kuk ),장종성 ( Jong Sung Jang ) 대한물리의학회 2010 대한물리의학회지 Vol.5 No.2
Purpose:The Purpose of this study was to compare muscle activation and foot pressure on baby carrier and sling for baby care. Methods:Thirty one women subjects (mean age 23.2 years) participated in four static conditions: unloaded quite standing, carrying an anterior baby carrier, carrying a posterior baby carrier, and sling. The baby carrier and sling were loaded with baby model that filled 7.6kg loads. Surface electromyography was used to measure activity in the internal oblique, T4, L3, L5 paraspinal muscle, vastus medialis, biceps femoris, tibialis anterior, and gastrocnemius for four conditions. And foot pressure was measured by using MatScan system(Tekscan, USA). Results:The activation of Biceps femoris, T4, L3, and L5 paraspinal muscle were significant differences(p<.05), but other muscles were no significant differences in four conditions(p>.05). Right foot contact area and peak pressure of right mid foot area were significant differences in four conditions(p<.05). Conclusion:The results of this study indicate that the use of baby carrier of sling for baby care were influenced postural responses of young women. Further work is recommended to find out the influences of various assistive devices for baby care.
NC 가공을 위한 Ferguson 곡면의 오차 해석에 관한 연구
梁均懿,張鐘聲 全北大學校 1990 論文集 Vol.32 No.-
Sculputured surface are widely found in car body, ship hull and air plane parts. This paper covers computer-aided design of soulptured(or free-form) surface ; surface interpolation methods ; methods of generating CL-data for the machining of 3-D sculptured surface. The purpose of this paper is aimed to express how much we could show the real surface accurately comparing with the Ferguson surface used so many times, which is abtained from the 3-D point data through engineering calculation.