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유비쿼터스 컴퓨팅 환경에서 Event Driven 상황정보 모델링 및 서비스 구현
김형선 ( Hyoungsun Kim ),김현 ( Hyun Kim ),문애경 ( Aekyung Moon ),조준면 ( Junmyun Cho ),홍충성 ( Chungsung Hong ) 한국인터넷정보학회 2006 인터넷정보학회논문지 Vol.7 No.5
최근 상황인식 기술은 유비쿼터스 환경에서 중요한 이슈로 떠 오르고 있으며, 연구자들에 의해 많은 연구가 이루어 지고 있다. 상황인식 기술은 상황정보를 획득/가공하여 사용자에게 필요한 서비스와 정보를 제공하는 컴퓨터 시스템이다. 상황인식 시스템은 각종 센서로부터 발생하는 낮은 수준의 상황정보를 높은 수준의 상황정보로 변환하여 사용자에게 원하는 서비스를 제공하는 환경을 만들어 준다. 본 논문에서는 물리적인 스마트 공간에 존재하는 각종 센서로부터 얻어진 하위단계(Low level)의 Event driven 센서정보를 온톨로지 기반 상황정보로 모델링 하여 상위단계(High level) 상황정보로 변환하는 상황인식 모델링과 시스템을 제안한다. 또한 변환된 High level 상황정보는 가상공간에서 ECA(Event, Condition, Action) 룰에 따라 사용자에게 언제 어디선지 사용자가 필요로 하는 능동적이고 지능적인 서비스를 제공하고, 스마트 오피스 환경에서 발표 도우미 서비스를 구현하였다. Context-aware computing is an emerging paradigm to achieve ubiquitous computing environments by enabling computer systems to understand their situational contexts. A context-aware system uses context to provide relevant information and services to the user depending on the user`s task. In this paper, we propose an ontology based context aware modeling methodology that transmits low level contexts acquired by directly accessing various sensors in the physical environments to high-level contexts. With these high level contexts, context aware application can provides proactive and intelligent services using ECA (Event Condition Action) rules. We implemented a presentation service in smart office environment.
Development of CAMUS based Context-Awareness for Pervasive Home Environments
Aekyung Moon,Minyoung Kim,Hyoungsun Kim,Kang-Woo Lee,Hyun Kim 보안공학연구지원센터 2007 International Journal of Smart Home Vol.1 No.1
With the advent of pervasive computing environments, the issue related to context-aware middleware is an emerging area of research. We propose proactive services on the basis of CAMUS (Context-Aware Middleware for URC Systems). First, this paper presents the system architecture of CAMUS. CAMUS is a middleware for providing context-aware applications with development and execution methodology. Accordingly, the applications developed by CAMUS respond in a timely fashion to contexts. Secondly, this paper illustrates the contents recommendation and control service agents with the property, operation, and task for the context-aware active services. Next, proposed active services are applied to the pervasive home environment for evaluation of our system. To do this, we implement the TV contents recommendation service agent, control service agent and context-aware task using CAMUS. And we evaluate the performance of Planet communication model of CAMUS.
( Juyeon Lee ),( Minkyoung Kang ),( Jiseon Yoo ),( Sujeong Lee ),( Minji Kang ),( Bohyun Yun ),( Jong Nam Kim ),( Hyoungsun Moon ),( Yihyung Chung ),( Sangnam Oh ) 한국미생물생명공학회 2023 Journal of microbiology and biotechnology Vol.33 No.7
Sarcopenia is defined as loss of muscle mass and strength due to aging. Recent studies show that sarcopenia may improve via the gut-muscle axis, suggesting that gut health may affect muscle phenotypes. In this study, we aimed to investigate the ability of Lactobacillus rhamnosus JY02 as a probiotic strain isolated from kimchi to alleviate sarcopenia. L. rhamnosus JY02-conditioned medium (CM) reduced dexamethasone (DEX)-induced myotube diameter atrophy and expression of muscle degradation markers (MuRF1 and atrogin-1) in C2C12 cells. The amelioration of sarcopenia was investigated by measuring body composition (lean mass), hand grip strength, myofibril size (using histological analysis), and mRNA and protein expression of muscle-related factors in a DEX-induced mouse model. The results of these analyses showed that L. rhamnosus JY02 supplementation promoted the production of muscle-enhancement markers (MHC Iβ, MHC IIα, and Myo-D) and reduced both the production of muscle degradation markers and the symptoms of muscle atrophy (loss of lean mass and muscle strength). We also found decreased levels of pro-inflammatory cytokines (IL-6, IFN- γ) and increased levels of anti-inflammatory cytokines (IL-10) in the serum of DEX+JY02-administered mice compared to those in DEX-treated mice. Overall, these results suggest that L. rhamnosus JY02 is a potent probiotic supplement that prevents sarcopenia by suppressing muscle atrophy.