• Journal of the Korea Academia-Industrial cooperation Society
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• v.9 no.5
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• pp.1289-1295
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• 2008

Recently, it is progressing a study for supporting various application services using OpenAPI(Application Program Interface). But it is not enough a study related OpenAPI(Open Application Interface) to access many collected context data of sensor networks for ubiquitous application services. Therefor, this paper presents Pull/Push service model based on sensor networks, and implements OpenAPI fer Pull/push application services. And, we design and implement OpenAPI using web service for Pull application services. This Pull OpenAPI supports users the context data of temperature and humidity using the remote service based on .Net framework in sensor networks. And, we design and implement OpenAPI using TCP/IP socket interface for Push application services in sensor network. This Push OpenAPI provides users a state of temperature, humidity collecting in sensor networks. Consequently, user can develop easily various application services as supporting OpenAPI instead of closed application interface of sensor networks based on existed specific database.

• Journal of the Korea Society of Computer and Information
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• v.3 no.4
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• pp.110-119
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• 1998

This paper describes a C-API (Cryptographic-Application program Interface) mechanism that can serve cryptographic service to one or more application programmers in an open distributed computing system. Generic cryptographic service, provides application Programmers with cryptographic algorithms and interfaces which can be shared so that the programmers can program distributed applications containing security services even though they have no detailed knowledge of cryptographic algorithms. Therefore, in this paper, a generic C-API mechanism is designed that can be used independently from various application environments and basic system structures so that programmers can use it commonly. This mechanism has the advantage that allows application programmers be able to use some cryptographic services and key management services not considering of the application program and operating system.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.15 no.5
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• pp.125-131
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• 2015

In order to vitalize the Rich Communication Service-e(RCS-e) service, RCS-e users need various ways to use RCS including RCS-e apps. A RCS standards organization has suggested Application Program Interface(API). Since it only dealt with functional requirements, it was not enough to implement the API. This paper suggests an open API framework that can utilize RCS-e through a web interface. By using the framework, web developers can implement various RCS-e-enabled web applications. A system architecture is defined for the framework. Call flows for establishing a RCS-e session between the framework and other nodes are defined. Also, rules and examples for translating protocols between them are provided. Finally, performance evaluation proves that the proposed framework does not add loads to the existing network infrastructure.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.16 no.5
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• pp.77-82
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• 2016

Web developers have had difficulties in using Rich Communication Service-e(RCS-e) on their applications because of complicated protocols and closed interfaces. In order to vitalize the use of RCS-e, we need a RCS Application Program Interface(API) which has simple protocols and can be accessed easily. This paper presents the web-based Open API Framework for the RCS-e presence feature. A system architecture for the framework is defined. Call flows for the presence feature between the framework and other nodes are defined. Also, one of the call flows is illustrated to explain how to convert web-based requests to RCS-e requests. Finally, performance evaluation proves that the framework does not add any loads to the existing network infrastructure.

• Proceedings of the Korean Information Science Society Conference
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• 2001.10b
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• pp.550-552
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• 2001

본 논문은 3차원 그래픽스 시스템이 기본적으로 제공하는 프리미티브인 면(surface), 솔리드(solid)의 복셀화 및 이들을 결합한 CSG 표현의 복셀화에 대하여 고찰한다. 복셀화는 서피스로 표현된 물체의 빈 내부를 복셀로 표현하여 내부를 태우는 과정이다. 본 방법의 특징은 PC 플랫폼이 제공하는 그래픽스 API인 OpenGL을 이용하여 면, 솔리드 등을 고속으로 복셀화하여 이들을 기본 물체로 하여 불리언연산에 의해서 간단히 새로운 물체를 만들고 볼륨 환경에서 이들을 단일화된 방법으로 렌더링할 수 있는 것이다.

• Proceedings of the Korean Information Science Society Conference
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• 2006.06d
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• pp.226-228
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• 2006

최근 정보통신 환경은 통신, 방송, 인터넷이 통합되는 디지털 융합 서비스 제공 형태로 급속히 변화하고 있다. 이에 따라 통신환경이 개방형 네트워크 형태의 광대역통합망으로 변화하였다. 이런 광대역 통합망에서는 Open API(Application Program Interface)에 의하여 third-party 애플리케이션의 제공을 가능하게 한다. Open API에는 대표적으로 Parlay API가 있으며 Parlay API와 웹 서비스를 접목시키고 한단계 더 추상화한 Parlay X API가 있다. 웹 서비스의 요소중의 하나인 UDDI는 웹 서비스를 쉽게 검색, 공유 및 재사용 할 수 있도록 하는 환경을 가져오게 된다. 본 논문에서는 웹서비스기반의 개방형서비스 게이트웨이를 위한 효율적인 UDDI 레지스트리 구축방안에 대해 제안하였다.

• Korea Science and Art Forum
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• v.37 no.3
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• pp.135-145
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• 2019

IFC(Industry Foundation Classes) is used for information exchange in BIM-based collaboration process, and it does not secure reliability of information exchange results between fields due to structural limitations. In the end, it is a realistic problem that we have to use specialized BIM software by field, and we can not secure smooth interoperability in the process of information exchange and change. This study was conducted to find ways to secure the interoperability of BIM work between architecture and structure fields by utilizing Open Source provided by software developers to solve these problems. First, through expert survey and in-depth interview, information and improvement factors required in the process of collaboration between architecture and structure were derived. Second, in order to find a solution to the improvement factors, existing studies related to Open-API and domestic and overseas APIs were investigated and analyzed. Third, Ad-On was developed to secure interoperability by using Open API, mainly BIM S/W, which is mainly used in each field. As a result of the study, the possibility of securing interoperability through the management of the design change history between fields was confirmed by using API. It is judged that the application range of API will be expanded to the construction and maintenance field in the future. Therefore, in order to increase the usability for application diffusion, further research on interface improvement through user-centered verification is needed.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.3B
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• pp.503-516
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• 2010

In this paper, we propose the converged profile and authentication scheme for supporting converged media services of broadcasting & communications convergence in fixed mobile convergence networks. The proposed scheme supports the management of access, service, mobility and IPTV profiles on subscriber and a function of open API(Application Program Interface) for providing the subscriber profile for the third party service provider with the PUSH/PULL method. The open API is based on a web service and a REST(Representational State Transfer) and provides various services for the third party service provider with ease. In addition, the proposed scheme supports a function of SSO(Single Sign-on). After user succeeded in establishing an access connection, user can sustain the same authentication state with this function although connected access network is changed or IMS(IP Multimedia Subsystem) service network is attached. We evaluate and analyze the performance of the proposed scheme through the implementation of CUPS(Converged User Profile Server) system test-bed.

• The KIPS Transactions:PartC
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• v.12C no.6 s.102
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• pp.773-780
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• 2005

Recently, the telecommunication network is in a transition toward the BcN (Broadband convergence Networks) that integrates the Internet, the telecommunication and the broadcasting. The BcN makes it possible to provide of 4he third-party application by using the Open API The Parlay X API is an example of the Open API and the Parlay X API is grafted in the Web Service and is abstracted from the Parlay API. So, the Parlay X API does not only have advantages of a Web Service, but also disadvantages of the Web Service. The main disadvantage of the Web Service is that it does not support the any QoS mechanism. In this paper, we propose the architecture that solves the reliability among the QoS issues for the Web Service. The proposed mechanism adopts the Asynchronous architecture for the reliable Web Service and improves the performance of the retransmission between the client and the server using the expected response time. We perform the performance evaluation through the simulation in older to compare with the existing mechanism. Consequently, we can confirm that the performance of the proposed mechanism performs better than the existing mechanism.

• Proceedings of the Korean Society of Computer Information Conference
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• 2010.07a
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• pp.507-508
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• 2010

본 논문에서는 구글 (Google)의 개방형 플랫폼인 안드로이드 (Android)를 통해 테마파크의 서비스 품질을 향상 시킬 수 있는 애플리케이션을 개발하고자 한다. 이를 위해 OpenAPI (Open Application Program Interface) 중 가장 많이 사용하고 있는 지도 API와 최근 대중화 되고 있는 스마트폰의 GPS를 이용하여 테마파크 내에 있는 객체들의 실시간 정보를 모니터링 할 수 있는 기능을 제공하고자 한다. 이러한 기능을 통해 현재 테마파크 내의 구조물, 편의시설, 놀이기구 및 동행자의 위치와 정보를 확인할 수 있다. 이를 통해 놀이기구 탑승에 소요되는 시간을 최소화하여 고객 만족도를 향상 시킬 수 있으며 노약자, 어린이 실종이 발생한 경우, 신속하게 실종자의 위치를 확인할 수 있어 아동 범죄, 미아 방지 및 노약자 안전을 확보할 수 있다.