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컨텍스트 기반 맞춤형 웹 서비스 제작을 위한 시뮬레이션 기반 방법론
장희정,김주원,최성운,이강선,Chang, Hee-Jung,Kim, Ju-Won,Choi, Sung-Woon,Lee, Kang-Sun 한국시뮬레이션학회 2006 한국시뮬레이션학회 논문지 Vol.15 No.4
퍼베이시브 컴퓨팅(pervasive computing) 기술이 현실화됨에 따라, 사용자에게 언제 어디서나 맞춤화된 서비스를 제공하기 위한 연구가 확대되고 있다. 기존 연구에서는 주로 단일 서비스가 센서 정보를 처리하는 제한된 방향으로 맞춤화된 서비스를 제공하고 있어, 사용자의 다양한 요구에 적응적인 서비스를 제공하는데 한계가 있다. 본 연구에서는 이와 같은 문제점을 해결하기 위해 시뮬레이션 기반 상황 인식 웹 서비스(CAS: Context-Aware Web services) 개발 방법론을 제안한다. 제안된 방법론은 사용자 상황 정보(예. 위치), 웹서비스 상황 정보(예. 반응시간), 사용 기기의 상태(예. 가용성), 환경 정보(예. 센서 데이터) 등을 시뮬레이션을 통해 종합적으로 고려하여 사용자 환경에 적응적인(adaptable) 서비스를 제공하도록 한다. With the emergence of pervasive computing, personalization becomes an important issue to provide with users customized services, anywhere and anytime in their specific environment. Many researches have shown the possibilities of personalization by acquiring and processing sensor information around users. However, personalization remains still at its infancy, since most researches have failed to consider various contexts comprehensively besides sensor data, and just developed tailored services for a specific application domain. In this work, we propose a simulation-based CAS (context Aware Web Services) development methodology. Our methodology considers various contexts on users (eg. current location), web services (eg. response time), devices (eg. availability) and environment (eg. sensor data) all together by simulating them on the fly for personalized and adaptable services.
sPAC(Web Service Performance Analysis Center): 성능 중심의 웹 서비스 조합 도구
장희정,송형기,이강선,Chang, Hee-Jung,Song, Hyung-Ki,Lee, Kang-Sun 한국시뮬레이션학회 2005 한국시뮬레이션학회 논문지 Vol.14 No.3
Web services and their composition (web processes) are promising technologies to efficiently integrate disparate software components over various types of systems. As many web services are nowadays available on Internet, quality of services (QoS) and performance/cost become increasingly important to differentiating between similar service providers. In this work, we introduce sPAC (Web Services Performance Analysis Centre) and show how customers can benefit from sPAC to consider performance in composing and commercializing web services. sPAC 1) helps users to graphically describe the workflow of web services, 2) invokes web services to test out performance for light load conditions, 3) automatically converts the web services and the flow between them into a simulation model, 4) conducts extensive simulations for heavy load conditions and various usage patterns, and 5) reports analysis results and estimation data for the web services.
미국 북서부 오레곤주 타이분지 내 탄화수소 생성과 배출에 대한 모델링 연구
장희정,유인창,Jang, Hee-Jeong,Ryu, In-Chang 대한자원환경지질학회 2009 자원환경지질 Vol.42 No.1
근원암으로부터 탄화수소가 생성되고 배출되는 시기는 석유시스템 모델링을 이용하여 분지의 지사를 복원함으로써 평가할 수 있다. 미국 북서부 오레곤주에 위치한 타이분지는 탄화수소 생성 가능성이 높은 지역이다. 본 연구에서는 남부타이분지에 대한 구조 층서적 관점에서의 분지 진화와 열역사 및 매몰사를 석유시스템 모델링의 수치모델을 사용하여 복원, 시뮬레이션 하였다. 분지 내 탄화수소 생성과 배출을 이해하기 위해 잠재 근원암에 대한 유기 지화학적 평가와 가능한 석유시스템을 분석하였다. 유기 지화학 자료를 통해 미분화된 움콰 그룹, 클라마스산의 이암층, Remote Member와 Coquille River Member에 협재된 탄층과 탄질 이암이 분지 내 가스를 생성시킬 수 있는 잠재력이 큰 근원암임을 알 수 있다. 남부 타이분지의 상대적으로 높은 열적 성숙도가 쿠스베이 퇴적층의 하중 압력에 의한 매몰과 연관됨을 지시하여 준다. 서부 캐스케이드흐로부터 관입에 의한 열 유입 또한 분지의 높은 열적 성숙도에 영향을 미친다. 이러한 분석을 바탕으로 근원암의 성숙과 탄화수소 생성, 및 배출이 석유시스템 모델을 통해 평가되어졌다. 모델링 결과는 모든 잠재 근원암으로부터 탄화수소가 생성은 되었으나 오직 Remote Member에서만 배출이 일어났음을 알려준다. The timing of hydrocarbon generation and expulsion from source rocks can be evaluated by reconstructing the geohistory of the basin using petroleum system modeling. The Tyee basin is generally considered having a high hydrocarbon generation potential For the southern part of the basin, the basin evolution from a structural and stratigraphic points of view, the thermal history, and the burial history were reconstructed and simulated using numerical tools of basin modeling. An evaluation of organic geochemistry for the potential source rocks and the possible petroleum systems were analysed to improve the understanding of the hydrocarbon charge of the basin. Organic geochemical data indicate that the undifferentiated Umpqua Group, mudstones of the Klamath Mountains, and coals and carbonaceous mudstones in the Remote Member and the Coquille River Member are the most potential gas-prone source rocks in the basin. The relatively high maturity of the southern Tyee basin is related to deep burial resulting from loading by the Coos bay strata. And the heating by intrusion from the western Cascade arc also affects to the high maturity of the basin. The maturation of source rocks, the hydrocarbon generation and expulsion were evaluated by means of basin modeling. The modeling results reveal that the hydrocarbon was generated in all potential source rocks and an expulsion only occurred from the Remote Member.
리코더를 활용한 천식환자의 호흡간호프로그램 개발 및 효과
장희정(Jang, Hee Jung) 기본간호학회 2011 기본간호학회지 Vol.18 No.1
Purpose: This study was conducted to develop a respiratory nursing program using recorder playing for patients with asthma and to determine the effects of the program. Method: Participants were 26 patients with asthma (experimental group: 13, control group: 13). The experimental group participated in the respiratory nursing program for six months from April, to October, 2007. Content included playing a recorder, group education about asthma, and educational messages including cellular phone messages. The control group received usual care during the six months. Results: In this research the respiratory nursing program using recorders was developed in 3 stages: initial stage, advanced stage, and wrap up stage. Compared to the control group, fatigue status in the experimental group improved significantly as well as level of forced expiratory volume in 1 second. However significant differences were found in sleep status, mood, or quality of life. Conclusions: These results suggest that this respiratory nursing program for symptom management of patients with asthma led to improvements in self care activity. Nursing interventions are needed to maintain and further enhance the quality of life of these patients and the interventions should be implemented over a transition period.