• Journal of the Korean Society for information Management
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• v.26 no.1
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• pp.185-214
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• 2009

The purpose of this study is aimed to clarify the usefulness of meta search system using Open API of library online catalog by constructing OPAC-based search system using Open API of library online catalog and meta search system using Open API of library online catalog, and comparing the usability of the two experimental search systems. As for usability, on the whole, it was higher in meta search system using Open API of library online catalog than OPAC-based search system using Open API of library online catalog, and there was statistically significant difference. Therefore, if libraries share and use enriched content which is provided through Open API for book search, which is opened by Internet bookstores, search engines and Web portals, it is expected that it will be helpful in enhancing bibliographic data, expanding subject access point, empowering subject search ability, extending meta search service, improving book availability, and reducing catalog cost.

• Proceedings of the Korean Society of Computer Information Conference
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• 2008.06a
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• pp.251-255
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• 2008

최근 모바일 시스템의 성능이 향상되면서 다양한 형태의 동적인 메뉴 구성과, 메일 및 이차원 지도 등의 표현에 벡터 그래픽을 도입하고 있다. 모바일 기기에서 사용되는 벡터 그래픽 처리 기술은 Flash Lite, SVG(Scalable Vector Graphics)등이 널리 사용되고 있는데 두 가지 모두 소프트웨어 방식으로 사용되고 있다. 매크로미디어사의 Flash Lite는 연산에 많은 메모리를 필요로 하고, SVG는 웹 표준에 맞춘 스크립트 해석 기반으로 구동 속도가 느리다. 모바일 컴퓨팅 환경에서 벡터 그래픽스에 대한 필요성과 사용빈도가 증가함에 따라 메모리를 적게 사용하고 하드웨어 가속기를 지원 할 수 있도록 저 수준의 API(Application Programming Interface)인 OpenVG 1.0을 크로노스 그룹(Khronos Group)에서 제정하였다. 본 논문은 모바일 사용 환경에 맞추어 사용될 수 있도록 OpenVG 1.0에 기반한 API를 구현하고 실험하였다. 구현된 API는 느린 소프트웨어의 한계를 벗어나기 위해 하드웨어 가속기 설계에 적합하도록 각각의 API 블록 및 형태를 하드웨어 파이프라인 형태의 관점에서 설계하였고, 구현된 API를 윈도우즈 환경에서 기능을 검증하였다.

• Proceedings of the Korean Information Science Society Conference
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• 1998.10b
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• pp.306-308
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• 1998

PC를 클라이언트로, UNIX등의 운영체제를 탑재한 워크스테이션을 서버 플랫폼으로 구축되는 데이터베이스 응용 프로그램들은 데이터베이스 접근 API로 대부분 ODBC를 사용한다. 그런데, ODBC API에서 제공하는 자료형과 관련 함수들이 아주 복잡해서 이해와 사용이 어렵고, C 함수 형태의 API를 제공하기 때문에 C++나 자바와 같은 객체 지향 언어로 ODBC를 이용하여 클라이언트 시스템을 구현할 때는 OLE DB나 JDBC등의 클래스 라이브러리 API를 사용하는 것에 비해 이해하기 쉬운 프로그램 원시코드 생성이 어렵다. 본 연구에서는 데이터베이스 응용 프로그래머의 요구사항을 효과적으로 반영하여 ODBC API들을 C++클래스 형태로 설계 및 구현하였다. 구현된 C++ 클래스 형태의 데이터베이스 인터페이스를 사용하면, 보다 더 간결한 프로그램 원시 코드로 데이터베이스 응용 프로그램을 작성할 수 있다.

• The Transactions of the Korea Information Processing Society
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• v.4 no.12
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• pp.3088-3096
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• 1997

In this paper, we present WWW system over native ATM services. The use of native ATM services through ATM API can provide better performance and functionality than that of IP over ATM, LAN Emulation or Multiprotocol over ATM. Our WWW browser and server provide advanced WWW services based on enhanced performance and guaranteed QoS support by using native ATM service benefits. This paper describes and compares advantages and disadvantages of Native ATM Services and ATM Internet Services, and addresses ATM API standardization and development trend that are made by the ATNI Forum for the support of native ATM services, and then describes the architecture and operation of our WWW browser and server using ATM API. The system architecture is based on HTTP over ATM API capable of supporting guaranteed QoS over its connections. The system defines and uses new HTML attributes within hyperlinking HTML elements for the description of ATM QoS and traffic characteristics that are derived from UNI signaling 3.1 connection characteristics information elements. Our system uses WinSock 2 API as its ATM API.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38C no.7
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• pp.587-594
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• 2013

With the development of web 2.0 and the rapid diffusion of smart devices, current web service, which only provides very limited information and service, has been transformed into user-friendly and comprehensive web service called mash-up service. Mash-up service is defined as comprehensive service that is created by combining variety of web services. When composing a mesh-up service, Open API is used as web service interface. Current mash-up service, however, has fundamental problem in that it could not satisfy the various needs of users who want I-centric personalized service because it is developed and provided by service developers. To overcome these obstacles, a lot of studies on mesh-up framework are being performed for improving mash-up proess though, it is still in beginning stage. In this paper, we introduce an API selection and compostion method as the key technology for mesh-up framework that support the automatic creation of mesh-up service.

• The Transactions of the Korea Information Processing Society
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• v.6 no.7
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• pp.1884-1896
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• 1999

In this paper, we propose an ATM API for Java pplication programming. The proposed Java ATM API is an extended form of java.net package of the Java Core API. Our Java ATM API is defined based on the ATM Forum's semantic standard for native ATM services, "Native ATM Service : Semantic Description, Version 1.0". IN order to provide native ATM services, we defined several new classes within the java.net package, including AtmAddress for AtmAddress, AtmSocket, ATM BLLI and AtmBHLI for Atm BLLI and BHLI information, AtmServerSocket, AtmMulticastSocket, AtmSocketImpl for socket programming over native ATM communication, and AtmConnAttr for native ATM connection characteristics. Software structure for construcing the Java ATM API over Winsock 2 environment and its implementation method are also presented.

• International journal of advanced smart convergence
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• v.12 no.4
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• pp.35-43
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• 2023

This paper emphasizes that information received in disaster situations can lead to disparities in the effectiveness of communication, potentially causing damage. As a result, there is a growing demand for disaster and safety information among citizens. A user-centered disaster and safety information application service is designed to address the rapid dissemination of disaster and safety-related information, bridge information gaps, and alleviate anxiety. Through the Open API (Open Application Programming Interface), we can obtain clear information about the weather, air quality, and guidelines for disaster-related actions. Using chatbots, we can provide users with information and support decision-making based on their queries and choices, utilizing cloud APIs, public data portal open APIs, and solution knowledge bases. Additionally, through Mashup techniques with the Google Maps API and Twitter API, we can extract various disaster-related information, such as the time and location of disaster occurrences, update this information in the disaster database, and share it with users.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.04a
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• pp.792-795
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• 2012

최근 오픈 소스 커뮤니티가 활성화되고 수많은 오픈 소스들이 공개되고 있어서 많은 개발자들이 오픈 소스를 활용하고 있다. 그러나 오픈 소스도 정해진 라이선스 기반으로 공개되므로 오픈 소스를 사용할 때는 반드시 라이선스를 확인해야 한다. 본 논문에서는 안드로이드 앱의 라이선스 위반이나 코드 도용을 확인할 수 있는 방법으로서 안드로이드 앱 사이의 API 메소드 호출 유사도를 측정하는 방법을 제안한다. 원본 프로그램과 도용된 프로그램은 유사한 API 메소드를 사용할 것임을 예상할 수 있기 때문에 API 메소드 호출이 유사한 것을 확인하면 간접적으로 코드 도용을 확인할 수 있다. 본 논문에서 개발한 API 유사도 측정 도구는 안드로이드 앱의 소스 코드를 필요로 하지 않고, 안드로이드 달빅(Dalvik) 바이트 코드로부터 직접 API 호출 명령어를 분석하여 유사도를 측정한다는 특징이 있다. 본 논문에서 구현한 도구의 평가를 위해서 API 호출 유사도 비교 실험을 수행하였다. 그 결과, 실제로 API 호출 유사도가 높았던 두 앱이 서로 공통된 모듈을 포함하고 있음을 밝혀내었다. 그리고 선행 연구에서 제안했었던 안드로이드 달빅 코드 전체에 대한 유사도 비교 도구보다 비교 속도가 35% 정도 향상된 것을 확인하였다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.10
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• pp.2473-2481
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• 2014

The majority of next generation information systems will be working on portable mobile devices such as smartphones. REST Open API web services have quickly become popular among mobile application development. The use of REST web services are not only growing in popularity but totally changing the way of mobile applications development. This is because REST web services could be used in application development as a form of building blocks, which is completely independent, compatible, to any platforms. With this strength, REST web services encourage third party application to build add-on functionality. This research proposes the use of REST web service to replace the use of socket APIs into major internet communication APIs. To this end, this paper also provide performance evaluation of the REST web services compared to the conventional socket APIs, focusing on scalability by analytical and experimental evaluations. Finally, we summarize the possibility whether REST Open API web services have enough performance as future major internet communication primitive APIs.

• Journal of Internet Computing and Services
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• v.25 no.1
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• pp.1-8
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• 2024

In the API gateway, API composition is an essential function that can reduce the number of client calls and prevent over-fetching and under-fetching. API composition that operate with IMJ (In-Memory Join) consume a lot of resources, putting a burden on the performance of the API gateway. In this paper, to improve the problem of IMJ-style API composition, we propose SAPIC (Stream-based API Composition), which delivers the data to be composed to the client by streaming. SAPIC calls each MSA API that makes up the client response data and immediately streams the received response data to the client, reducing the resource consumption of the API gateway and providing faster response time compared to IMJ. As a result of a comparison experiment with GraphQL, a representative API combination technology, SAPIC recorded a maximum CPU occupancy rate of approximately 21 to 70 % lower, a maximum heap usage rate of approximately 16 to 74 % lower, and a throughput rate that was 1 to 2.3 times higher than GraphQL.