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송재경,변영철,이상준 제주대학교 공과대학 첨단기술연구소 2005 尖端技術硏究所論文集 Vol.16 No.2
In the ubiquitous computing environment, service providers should able to deliver their services to various devices, such as PDA, Smart Phone, Telematics devices. For this purpose, W3C announced 'Composite Capabilities / Preference Profile (CC/PP) Standard' for delivery-context description. At present, only a small number of mobile phone supports the CC/PP standard, But most of contents servers do not. In this paper, by analyzing request headers which are received from various ubiquitous devices, a rule-based CC/PP profiling method in ubiquitous environment is developed. Service providers can use these profiles for providing optimized services to the various devices which have different capabilities.
송재경,이기헌,박화연,현준영,오승원,배우경,한종수,정세영,엄유진,이가혜,양지혜 대한가정의학회 2017 Korean Journal of Family Medicine Vol.38 No.1
Background: The efficacy of two artificial tears, carboxymethylcellulose (CMC) and hyaluronate (HA), was com-pared in the treatment of patients with dry eye disease.Methods: We conducted a systematic review and meta-analysis on randomized controlled trials in the PubMed, Embase, Cochrane Library, and ClinicalTrials.gov databases. The efficacy was compared in terms of the mean change from baseline in tear break-up time. The meta-analysis was conducted using both random and fixed effect models. The quality of the selected studies was assessed for risk of bias.Results: Five studies were included involving 251 participants. Random effect model meta-analysis showed no sig-nificant difference between CMC and HA in treating dry eye disease (pooled standardized mean difference [SMD]=-0.452; 95% confidence interval [CI], -0.911 to 0.007; P=0.053). In contrast, fixed effect model meta-analysis revealed significant improvements in the CMC group when compared to the HA group (pooled SMD=-0.334; 95% CI, -0.588 to -0.081; P=0.010).Conclusion: The efficacy of CMC appeared to be better than that of HA in treating dry eye disease, although meta-analysis results were not statistically significant. Further research is needed to better elucidate the difference in effi-cacy between CMC and HA in treating dry eye disease.
Streptomyces에서 생산되는 Deoxy 혹은 Dideoxyhexose를 포함하는 천연화합물의 생합성 유전자를 찾기 위한 연구
송재경 선문대학교 1994 鮮文論叢 自然科學 編 Vol.- No.4
Streptomyces에서 생산되는 생물학적 활찰성이 높은 데옥시 혹은 디데옥시당을 포함하는 천연화합물의 생합성 과정에는 반드시 산화환원효소가 관여한다. 현재 알려저 있는 산화환원효소 펩타이드를 비교하여 그 중 유사성이 높은 영역으로부터 PCR(polymerase chain reaction) primer를 합성하였다. 합성된primer와 6가지 균주의 total DNA를 template로 하여 PCR로 부터 모두 DNA probe로 사용할 수 있는 산화환원효소 PCR 유전자를 얻었다 그 중 2개는DNA 분석에 의해 산화환원효소 유전자임을 밝혔으며, 이 유전자 주위를Southern blot 실험과 DNA 분석으로 생합성 유전자가 집단으로 존재함을 보여주고 있다. 이 방법은 데옥시 혹은 디데옥시당을 포함하는 항생제 및 항암제의 생합성 유전자를 언근 일반적인 방법임을 제시한다.
송재경,김도현,변영철,이상준 제주대학교 공과대학 첨단기술연구소 2004 尖端技術硏究所論文集 Vol.15 No.2
Web Service is a new model based on web to offer dynamic information for a user's request. Currently, the web service discovery mechanism is not efficient because it does not support automatic discovery based on the semantics or capabilities of a web service. The language for semantic web service, such as OWL-S, is being developed to express the capability of a web service semantically. Such semantics can support the more flexible discovery of web services. Web service discovery occurs when the provider's description matches to that of requester. But the matching can fail when the ontologies of service description differ from that of the requester although the requester wants that Web Service. In distributed environment service providers develope their semantic web services independently and tend to use their ontologies to describe web services. So a new approach must be required to avoid service discovery failure. In this paper, a method of annotating the query of requester and discovering semantic web services without service discovery failure is proposed.