임베디드 OS 환경하의 자바 ORB 설계 및 구현

황희정(Hee-Joung Hwang),강운구(Un-Gu Kang),왕창종(Chang-Jong Wang) 한국정보과학회 2000 한국정보과학회 학술발표논문집 Vol.27 No.1A

임베디드 시스템에서의 응용 개발 기술들은 주로 임베디드 장치에 종속적인 것들로 CPU, 다양한 입력장치, 네트워크, 디스플레이, 사용자 인터페이스에 따라 개별적으로 소프트웨어 및 서비스들을 개발하는 방식으로, 소프트웨어의 내용과 복잡도의 증가에 따른 개발의 어려움이 증가하는 구조이다. 또한 네트워크를 기반으로 한 임베디드 시스템에서 이기종간의 상호운영이 가능한 서비스의 개발이 큰 문제가 되고 있다. 본 논문에서는 자바 기반의 임베디드 ORB를 설계한다. 설계한 ORB는 임베디드 OS 환경에 자바 버추얼 머신 상에서 동작 하므로 다양한 임베디드 시스템에서 별도의 코드 변환이나 수정 없이 이용할 수 있는 표준화된 API를 제공하며 모듈화를 통해 기능의 확장과 축소가 가능한 구조를 가진다. 또한 minimumCORBA 사양을 준수 함으로서 기존의 CORBA 서비스나 제품들과 상호 운영성을 유지한다.

유-헬스 서비스의 상호 운용성 향상을 위한 애플리케이션 프레임워크

황희정(Hee Joung Hwang),최진탁(Jin-Tak Choi) 한국정보기술학회 2010 한국정보기술학회논문지 Vol.8 No.5

In this paper we suggested the OSGi based application framework technique to improve the interoperability of u-Health Service. The idea of the proposed application framework is that a dynamic modular component model for HIS and EMR. Currently, lots of devices and systems associated with u-health are under development but there are so many problems on compatibility because of each manufacturer have different protocols and software. In order to solve this problems, we developed the system prototype of u-health service based on our application framework. Proposed u-health application framework can make it easy to connect between the devices and provide dynamic management function of component in application. Through the simulation environment, we have confirmed the suitability of our framework and the server component analyzes the health state of patients from PHD and exchange the information about the patients state to EMR system.

향상된 임상시험정보 공유를 위한 임상시험정보방 구축

황희정(Hee-Joung Hwang),이선희(Sun-Hee Lee),박인숙(In-Sook Park),정주연(Joo-Yeon Jung),강운구(Un-Gu Kang) 한국정보기술학회 2008 한국정보기술학회논문지 Vol.6 No.5

In this study, we have developed a real-time clinical trials information system for reflect recent interest on international and domestic clinical trials and the demands of patient and clinicians by expanding and reorganizing existing search service linked to KiFDA database. Currently system in KFDA have some problem on management that could not search real-time information from KiFDA database. Then we have solved this problem using realtime search mechanism with KiFDA database. In particular, the database has enabled the provision of more reliable information covering approved clinical trials and administering organizations for those who are interested in clinical trial.

분산객체 처리 성능향상을 위한 디자인 패턴

황희정(Hee-Joung Hwang),최진탁(Jin-Tak Choi) 한국정보기술학회 2007 Proceedings of KIIT Conference Vol.2007 No.-

보다 많은 애플리케이션이 컴포넌트 및 서비스와 상호작용을 위한 네트워크에 포함되고, 그와 같은 분산 아키텍처 에서의 성능향상에 대한 이슈는 점점 중요해 지고 있다. 분산객체에 있어 함수나 메서드 호출시간은 경우 여전히 중요한 문제이기는 하지만 분산 컴포넌트간의 커뮤니케이션 시간에 대한 교려가 성능에 대한 새로운 이슈로 주목받고 있다. 본 논문 에서는 쇼핑카드 사례를 들어 분산 디자인에 대한 연구를 진행 했다. 본 논문에서 제안하는 디자인 패턴은 매우 단순하지만 필요한 모든 요소를 모두 가지고 있다. 제안된 디자인 패턴은 분산호출을 줄임으로서 덜 세분화된 커뮤니케이션을 유지하고 다중 원격 호출을 하나로 조합하는 D-List 패턴을 제안한다. The more applications evolve into networks of interacting components and services, the more important it becomes to consider the potential performance issues that typically arise from such distributed architectures. The execution time of certain functions or methods is certainly still important, but the communication time between distributed components now gains influence in terms of its affect on performance considerations. We study distributed designs by the means of a shopping cart example. This design pattern is quite simple, but still powerful enough to provide important insights into good and not so good practices. It shows that keeping the communication coarse-grained by reducing the number of remote calls is a good practice. It also proposes an ID-Lists pattern to combine multiple remote calls into one.

피어 네트워킹에서의 효율적 객체 공유를 위한 공유객체모델

강운구,황희정,이영호,Kang, Un-Gu,Hwang, Hee-Joung,Lee, Young-Ho 한국정보과학회 2004 정보과학회논문지 : 기술교육 Vol.1 No.1

본 논문에서는 피어 네트워킹 환경에서 다양한 자원의 효율적인 공유를 위한 공유객체모델을 제안한다. 이 모델은 자원을 공유 객체 클래스(SOC : Shared Object Class)라고 하는 새로운 형태의 자원 램퍼(wrapper)를 도입하여 자원을 객체화하고, 객체 기술서(object descriptor)에 의한 자원 명세를 통해 캡슐화된 자원 객체에 접근할 수 있는 방법을 제공한다. 제안한 공유객체모델은 공유 자원을 유형별로 분류하여 이에 따른 표준화된 인터페이스 모듈을 제공하여 P2P 네트워크 환경에서 특정 운영체제, 프로토콜, 데이타베이스 등에 영향을 받지 않고 파일의 공유를 포함한 네트워크, 저장 장치, 프린터, 오프라인 연계 서비스 둥의 다양한 자원을 객체 기반의 자원으로 다룰 수 있는 방법을 제공함으로써 피어 네트워킹에서 요구되는 확장성 및 상호운용성을 제공한다. In this thesis, we proposed a shared object model for efficient sharing of various resources in peer networking environment. This model introduces the new type of resource wrapper which is SOC(Shared Object Class), makes the resources into objects, and provides a method for accessing the encapsuled objects through resource specification according to the object descriptor. The shared object model classifies the shared resources according to the types, provides standardized interface modules, isn't affected by specific operating system, protocol, and database in the P2P network environment, and provides a method which can handle various resources like network including file sharing, storage equipment, printer, offline connection service as object-based resources. Accordingly this shared object model can provide scalability and interoperability which are required in Peer Networking.

개인건강서비스를 위한 보안 요구사항

김상곤,황희정,Kim, Sang-Kon,Hwang, Hee-Joung 한국전기전자학회 2015 전기전자학회논문지 Vol.19 No.4

본 논문에서는 다양한 형태의 개인건강서비스들이 ICBM(사물인터넷, 클라우드, 빅데이터, 및 모바일) 환경에서 제공될 때, 프라이버시 이슈를 포함하여 개인건강서비스에 대한 보안 요구사항이 제안된다. 개인건강과 연관된 서비스들은 클라우드 환경에서 제공될 것이 예상되므로, 우선적으로 클라우드 환경의 보안 요구사항에 대해 조사한 후, 클라우드 환경에서의 직접적인 위협과 간접적인 위협을 포함한 보안 위협을 개인건강서비스의 보안 관점에서 분석한다. 그리고 본 논문에서 의료서비스를 위한 전자의료기록(EMR)에 대한 보안 요구사항에 기반을 두고 개인건강서비스를 위한 보안 요구사항을 도출한 뒤, 클라우드 환경의 보안요구사항이 개인건강서비스의 보안요구사항에 의해 충족될 수 있음을 나타내는 관계를 보임으로서 제안된 개인건강서비스에 대한 보안 요구사항의 타당성을 제시한다. When the variety of personal health services are provided in the ICBM(IoT, Cloud, Bigdata, and Mobile) environment, the security requirements of personal health service(PHS) including privacy issues is proposed in this paper. Because it is expected that the services related to personal health are provided in the cloud environment, the security requirements of a cloud environment is firstly investigated and then security threats including direct and indirect threats in a cloud environment are analyzed in terms of the security of PHS. In addition, the security requirements of PHS is developed based on the security requirements of electronic medical record(EMR) for medical service in this paper, then the validity of the proposed security requirements is shown by the relation between security requirements of cloud environment and PHS to indicate that a security requriement is supported by several security requirements of PHS.

힐링 서비스 환경에서 시각장애인의 웹서비스 접근성 향상을 위한 사용자 인터페이스 구조 설계

임석진(Seokjin Im),황희정(Hee-Joung Hwang) 한국정보기술학회 2015 한국정보기술학회논문지 Vol.13 No.12

Smart computing environments with the IT advanced in rapid speed and smart devices miniatured provide the convenience to our daily life. In these environments, the disabled can use healing services providing healthcare over the web and it is very important to improve the web accessibility for the efficient services for the disabled. The accessibility plug-ins for the disabled cause the process time long because it is the type of cursor searching. In this paper, we propose a user interface structure that adopts a tree structure in order to use in ease the web services through the intuitive perception of positions in the smartphone screen. The proposed structure lets the blind access the web services easily by boosting the web accessibility.

안전한 개인건강기록 관리 시스템 설계

이명규(Myung-Kyu Yi),황희정(Hee-Joung Hwang) 한국정보기술학회 2015 한국정보기술학회논문지 Vol.13 No.8

A Personal Health Record(PHR) is a collection of health-related information that is documented and maintained by the individual it pertains to and it is an emerging health information technology that individuals can use to engage in their own health care to improve the quality and efficiency of that care. As the increased amount of data for PHR has made it harder to process with the existing healthcare software, it requires an efficient way to organize and store such vast information. In this paper, we propose a data management scheme based on the characteristics of collected data in a hierarchical PHR system. In our proposed scheme, the available storage for the preprocessing of PHR data is selected to optimally utilize computing and storage resources. Moreover, we propose a safe and an efficient authentication mechanism for sharing personal health record. The analytical results show that our approach achieves better performance than the existing PHR management scheme by selecting the appropriate storage.

N-스크린 서비스를 위한 실시간 의료 정보 공유 프레임워크 설계 및 구현

임석진(Seokjin Im),황희정(Hee Joung Hwang) 한국정보기술학회 2013 한국정보기술학회논문지 Vol.11 No.10

Smart Healthcare in the convergence of advanced IT and medical technologies makes the expectation to effective health services higher. For the efficient services, it is critical to share health information between medical teams and patients. Although N-screen services is adaptable to the smart healthcare for sharing information, the existing researches on N-screen is confined within the fields of entertainments. In this paper, we design and implement a real-time health information sharing framework based on N-screen to support sharing medical information between N mobile devices. The designed framework supports the standard for health information and provides scalability to various services in hospitals. Also, the system can be applied to various healthcare services through the link to standard-based PHD.

자원·통신 효율기반 디지털병원 의료기기 원격 모니터링 시스템 설계

박상현(Sang-Hyun Park),황희정(Hee-Joung Hwang) 한국정보기술학회 2012 한국정보기술학회논문지 Vol.10 No.12

Although the digitization of medical information has been accelerating around the EMR system in recent years, there are many difficulties with data relay due to differences in the interface and message standards among medical equipments. A gateway-mediated relay method was introduced to solve those difficulties, but there is no effective management and monitoring system for such gateways that can affect the entire system functionality. This study planned and implemented an efficient operational plan for a gateway and monitoring system to help to resolve those problems. Data generated by medical equipments were divided into two types for communication efficiency and transmitted according to different transmission patterns. REST was inserted between a service gateway and a remote monitoring device for resource efficiency. The experiment results show that it used only 8.4% CPU and 2.5% memory to process 10,000 69-byte data at the server, thus recording server efficiency.