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클라이언트-서버기반의 능동적 멀티모달 프리젠테이션 시스템 설계 및 구현
손문식,정석태,정성태 원광대학교 공업기술개발연구소 2002 工業技術開發硏究誌 Vol.22 No.-
With the growing of Web technology, researchers are actively pursuing a user-friendly multi-modal presentation. As one of the result, MPML(Multimodal Presentation Markup Language) was develeped which enables an efficient multi-modal presentations using a character agent. However the MPML presentation system delivers information in one way. So, the learners and the information provider cannot communicate with other in realtime. To overcome this problem, We designed and implemented the active multi-modal presentation system which uses the character agent on the basis of client/server environment. It enable both the information provider and the learners to exchange questions and answers in realtime.
The Effect of Traditional Korean Medicine Treatment on CREST Syndrome: A Case Report
Joung, Jin-yong,Seo, Hyun-sik,Son, Chang-gue,Lee, Nam-hun,Cho, Jung-hyo The Society of Internal Korean Medicine 2017 大韓韓方內科學會誌 Vol.38 No.2
CREST syndrome is a form of limited cutaneous scleroderma that occurs only in certain parts of the body, such as the skin of the hands and face. CREST refers to the five main features of the syndrome: calcinosis, Raynaud's phenomenon, esophageal dysmotility, sclerodactyly, and telangiectasia. Currently, there is no standard treatment for CREST syndrome, and there have been no studies of the use of traditional Korean medicine (TKM) for this disease. This study describes the effects of Keumsuyukun-jeon on CREST syndrome. The patient in this case had typical clinical symptoms of CREST syndrome. These symptoms improved within a relatively short period of receiving the TKM treatment. The results of Anti-centromere antibody (AI) and high sensitivity C-reactive protein (mg/L) also improved.
Migration and Attacking Ability of Bursaphelenchus mucronatus in Pinus thunbergii Stem Cuttings
Son, Joung A,Jung, Chan Sik,Han, Hye Rim The Korean Society of Plant Pathology 2016 Plant Pathology Journal Vol.32 No.4
To understand how Bursaphelenchus xylophilus kills pine trees, the differences between the effects of B. xylophilus and B. mucronatus on pine trees are usually compared. In this study, the migration and attacking ability of a non-pathogenic B. mucronatus in Pinus thunbergii were investigated. The distribution of B. mucronatus and the number of dead epithelial cells resulting from inoculation were compared with those of the pathogenic B. xylophilus. Although B. mucronatus is non-pathogenic in pines, its distribution pattern in P. thunbergii was the same as that of B. xylophilus. We therefore concluded that the non-pathogenicity of B. mucronatus could not be attributed to its migration ability. The sparse and sporadic attacking pattern of B. mucronatus was also the same as that of B. xylophilus. However, the number and area of the dead epithelial cells in pine cuttings inoculated with B. mucronatus were smaller than in those cuttings inoculated with B. xylophilus, meaning that the attacking ability of B. mucronatus is weaker than that of B. xylophilus. Therefore, we concluded that the weaker attacking ability of B. mucronatus might be the factor responsible for the non-pathogenicity.
하수처리장 고도처리공정에 적용된 네오하이드로포일 교반기의 성능 평가
주윤식 ( Yoon-sik Joo ),손건태 ( Guntae Son ),배영준 ( Youngjun Bae ),구정은 ( Joung-eun Gu ),김준영 ( Junyoung Kim ),이승환 ( Seunghwan Lee ) 한국수처리학회 2016 한국수처리학회지 Vol.24 No.2
In this study, a newly developed neo-hydrofoil mixer was evaluated in a wastewater treatment plant based on the treatment efficiency and energy saving after the implementation of hydrofoil mixer. Several series of experiments were conducted in a wastewater treatment plant to overcome the production of scums and sludge settling problem. Computational fluid dynamics (CFD) and measurements of MLSS and DO were made with other measuring equipments to optimize the mixing condition. A set of vertical hydrofoil agitators was installed in a wastewater treatment plant with A2O process. After they were replaced with second stage of vertical hydrofoil agitators to pump up mixing power, proper mixing was achieved and more than thirty percent of energy was saved. Evaluation of properties on mixing technology applied to bioreactor processes is proved to be essential to eliminate scum and sludge settling problems and to save power input.
산소분압과 발생부위에 따른 켈로이드 배양섬유모세포의 혈관내피 성장인자(VEGF) 발현
문형식 ( Hyung Sik Moon ),손숙자 ( Sook Ja Son ),박건 ( Kun Park ),강희규 ( Hee Gyoo Kang ),임희정 ( Hee Joung Lim ),박향준 ( Hyang Jun Park ) 대한피부과학회 2009 대한피부과학회지 Vol.47 No.5
Background: The pathophysiological events resulting in keloid formation remain unclear. Overabundant levels of VEGF have been reported to contribute to excessive wound healing. There have been many studies describing the relationship between keloids and VEGF expression. However, there have been no reports about VEGF expression related to donor sites. Objective: We investigated VEGF expression of cultured normal and keloid fibroblasts obtained from different body areas under normoxic and hypoxic culture conditions. Methods: Normal fibroblasts from the earlobe (n=2), shoulder (n=2) and chest (n=2) as well as keloid fibroblasts from the earlobe (n=3), shoulder (n=3) and chest (n=3) were collected and cultured. VEGF expression of fibroblasts at 6 hours, 12 hours, 24 hours and 48 hours for cells maintained under normoxic and hypoxic conditions was measured by the use of RT-PCR. Paraffin-embedded tissues (normal and keloid tissue) were assayed by immunohistochemical staining. Results: For the cultured normal fibroblasts, VEGF expression for cells in the hypoxic condition was higher as compared to VEGF expression in cells in the normoxic condition, irrespective of the donor site and time. However, for the cultured keloid fibroblasts, VEGF expression for cells in the hypoxic condition was higher as compared to VEGF expression in cells in the normoxic condition for cultured shoulder fibroblasts. For each donor site, VEGF expression was highest in the shoulder, followed by the chest and earlobe for cultured normal fibroblasts, irrespective of time. For the cultured keloid fibroblasts, the highest VEGF expression occurred at 6 hours for cells in the normoxic condition and the highest VEGF expression occurred at 6 hours and 12 hours for cells in the hypoxic condition. Based on immunohistochemical staining, VEGF expression of paraffin-embedded normal tissue was lower as compared to paraffin-embedded keloid tissue. For each donor site in paraffin-embedded keloid tissue, VEGF expression was highest in the shoulder, followed by the chest and earlobe. Conclusion: Oxygen tension and the nature of fibroblasts from different donor sites are involved in keloid pathogenesis. (Korean J Dermatol 2009;47(5):539~546)
Driving of the Ball Screw Actuator Using a Global Sliding Mode Control with Bounded Inputs
Choi Hyeung-Sik,Son Joung-Ho The Korean Society of Marine Engineering 2005 한국마린엔지니어링학회지 Vol.29 No.7
The ball screw actuated by the electric motor is widely used as an essential actuator for driving the mechanical system by virtue of accuracy and force transmission capability. In this paper, a design of the global sliding mode control is presented to drive the ball screw actuator along the minimum time trajectory, In the proposed control scheme, if the ranges of parametric uncertainties and torque limits of the system are specified, the arrival time of the load along the minimum time trajectory can be estimated. Also, the arriving time at the reference input and the maximum acceleration are expressed in a closed form solution. Conversely, the capacity of a ball screw actuator including the motor can be easily designed if the external load and its transportation time are specified. The superior performance of the proposed control scheme and analysis is validated by the computer simulation and experiments comparing with other sliding mode controllers.