• 정보처리학회논문지D
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• 제8D권6호
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• pp.761-770
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• 2001

소프트웨어 산업이 급속하게 발전해감에 따라 정보 기술 업체간 경쟁이 더욱 심화되어 소프트웨어 재사용성, 적시성, 유지 보수성 등이 업체의 생명력으로 대두되면서 소프트웨어 컴포넌트 기술이 점차 각광을 받고 있다. 현재 몇몇 컴포넌트 생성 지원 도구들이 제공되고 있지만 컴포넌트의 식별, 모델링, 상세 설계, 코드 생성, 전개, 시험 등 컴포넌트 생성 전 과정을 밀접히 연계하여 지원하는 도구가 드물다. 또한, 특정 플랫폼에 의존적인 소규모 컴포넌트 생성에 중점을 두고 있어 사용자 관점의 다양한 규모의 컴포넌트 생성에는 제약이 따른다. 이 논문에서는 컴포넌트 생성에 연관된 모든 과정을 지원하는 컴포넌트 모델링 및 생성 지원 도구의 설계와 프로토타입 구현에 대해 기술한다. 컴포넌트 모델링은 영역 고유의 비즈니스 로직의 재사용 측면에서 컴포넌트 플랫폼 아키텍쳐에 관계없이 개념적인 컴포넌트의 식별 및 모델링을 지원한다. 상세설계 및 코드 생성 부분은 일차적으로 J2EE 플랫폼 아키텍쳐에 의존적으로 지원되며 설계 모델과 소스 코드의 일관성을 동적으로 유지시키는 Round-trip Engineering 기능을 지원한다.

• 한국CDE학회논문집
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• 제13권3호
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• pp.187-199
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• 2008

This paper describes a C++ class hierarchy of implicit objects for geometry modeling and processing. This class structure provides a software kernel for integrating many various models and methods found in current implicit modeling areas. The software kernel includes primitive objects playing a role of unit element in creating a complex shape, and operator objects used to construct more complex shape of implicit object formed with the primitive objects and other operators. In this paper, class descriptions of these objects are provided to better understand the details of the algorithm or implementation, and its instance examples to show the capabilities of the object classes for constructive shape geometry. In addition, solid modeling system shown as an application example demonstrates that the proposed implicit object classes allow us to carry out modern solid modeling techniques, which means they have the capabilities to extend to various applications.

• 한국통신학회논문지
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• 제34권4B호
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• pp.360-367
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• 2009

본 논문에서는 MAC-SAP (Medium Access Control-Service Access Point)에서 하향 100Mbps 이상의 처리 속도를 요구하는 IEEE 802.11n MAC의 구현을 위한 새로운 방안을 제안하고, 이를 이용해 설계된 MAC의 구조를 제시한다. 제안된 방식을 이용하면, 기존에 MAC 프로토콜의 검증 및 네트워크 기반 시뮬레이션 과정과 소프트웨어 및 하드웨어의 설계 및 검증 과정이 분리되어 진행되던 방식과는 다르게 하나의 통합된 코드를 사용하여 네트워크 시뮬레이션과 시스템의 설계가 밀접한 연관성을 가질 수 있다. 제안된 방식을 통해 구현된 IEEE 802.11n MAC은 상위계층 MAC과 하위계층 MAC의 두 부분으로 구성되며, 각각은 표준에 새롭게 추가된 기능의 효율성을 높일 수 있게 그 기능을 구분하여 각각 소프트웨어와 하드웨어로 설계되었다. 설계된 MAC은 ARM 기반의 FPGA 보드를 통해 검증되었다.

• Computers and Concrete
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• 제1권3호
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• pp.303-324
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• 2004

The Component-Based Software Development (CBSD) has established itself as a sound paradigm in the software engineering discipline and has gained wide spread acceptance in the industry. The CBSD relies on the availability of standard software components for encapsulation of specific functionality. This paper presents the framework for the development of a software component for the design of general member cross-sections. The proposed component can be used in component-based structural engineering software or as a stand-alone program developed around the component. This paper describes the use-case scenarios for the component, its design patterns, object models, class hierarchy, the integrated and unified handling of cross-section behavior and implementation issue. It is expected that a component developed using the proposed patterns and model can be used in analysis, design and detailing packages to handle reinforced concrete, partially prestressed concrete, steel-concrete composite and steel sections. The component can provide the entire response parameters of the cross section including determination of geometric properties, elastic stresses, flexural capacity, moment-curvature, and ductility ratios. The component can also be used as the main computational engine for stand-alone section design software. The component can be further extended to handle the retrofitting and strengthening of cross-sections, shear and torsional response, determination of fire-damage parameters, etc.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2003년도 추계종합학술대회 논문집
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• pp.227-233
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• 2003

본 논문은 MPLS 기반의 VPN 서비스를 제공하고 각 VPN 사이트가 요구하는 QoS를 제공할 수 있는 에지 라우터를 설계하고 구현한다. 에지 라우터 설계를 위하여 라우팅과 시그널링 프로토콜을 기반으로 하는 제어 구조와 패킷 포워딩을 위한 데이터 구조를 설계하고 이를 이용하여 각각의 기능적 블록간의 인터페이스를 설계한다. 또한 에지 라우터의 설계를 기반으로 차별화 된 VPN 서비스를 제공하는 MPLS기반의 VPN을 구현하고, 시뮬레이션을 통하여 설계된 에지 라우터 간 차별화 된 경로를 설정해 줌으로써 VPN 사이트 간에 요구되는 대역폭과 지연 등 트래픽 특성을 보장해 줄 수 있음을 확인한다.

• 디지털산업정보학회논문지
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• 제5권1호
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• pp.51-61
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• 2009

Conventional DES has been not only shown to have a vulnerable drawback to attack method called 'Meet in the Middle', but also to be hard to use that it is because software implementation has a number of problem in real time processing. This paper describes the design and implementation of the expanded DES algorithm using VHDL for resolving the above problems. The main reason for hardware design of an encryption algorithm is to ensure a security against cryptographic attack because there is no physical protection for the algorithm written in software. Total key length of 352 bits is used for the proposed DES. The result of simulation shows that the inputted plaintext in cryptosystem are equal to the outputted that in decryptosystem.

• 한국경영과학회지
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• 제12권1호
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• pp.139-139
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• 1987

This study addresses basic requirements for mathematical programming software, discusses considerations in designing these software, implementation issues facing in these types of applications development, and shows some examples of codes being developed in the course. This type of projects requires long and ever-changing evolutionary phases. The experience is therefore, valuaable in suggesting some useful hints which may be salvaged for similar projects as well as providing reusable codes. In particular, scanning and parsing the free-format inputs, symbol table management, mixed-language programming, and data structures dealing with large sparse matrices are indispensable to many management science software development. Extensions to be made are also discussed.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.384-389
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• 2008

In this paper, we propose a UML modeling of ATO on-board software. An automatic train operation (ATO) system is a real-time control system, which operates a train without a manual operation by a driver. For the safe and comfortable service, real-time embedded software for ATO on-board equipment should have both of high performance and reliability. UML-based object-oriented modeling technique is introduced and used widely to design software that satisfies this requirement. We used Rhapsody, which is a modeling tool for real-time embedded software, to model the construction and the behavior of ATO on-board equipment. As a result, ATO on-board software which performs the profile calculation and the real-time speed control is designed and implemented. The brief modeling result including behavioral characteristics and the simulation results are presented.

• 대한전자공학회논문지
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• 제23권1호
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• pp.1-9
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• 1986

This is the third part of the four-part paper describing the development of a packet-switched computer communication network named the KORNET. In this paper we describe the design and implementation of the X.25 protocol connecting packet mode data terminal equipments(PDTE's) with data circuit terminating equipments(DCE's). In the KORNET, the X.25 protocol has been implemented on the line processing module-A(LPMA) of the network node processor(NNP). In the implementation of X.25, we have divided the software module according to the service function, and have determined the the rules that interact between the modules. Each layer protocol has been developed using the technique of the finite state machine. Before the actual coding of softwares, we hafve used formal software development tools based on the specification and description language (SDL) and program design languate (PDL) recommended by the CCITT. In addition, for the efficient operation of the X.25 protocol system we have analyzed the system performance and the service scheduling method of each module. The results will also be given.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2015년도 춘계 종합학술대회 논문집
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• pp.15-16
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• 2015

Measuring sensor, equipment, ICT facilities and their software have relatively short life time comparing to constructional structure so that we should exchange or fix them continuously in the process of maintenance and management. In this paper, we propose a novel design of integrated maintenance, management, and measuring monitoring system applying the concept of mobile cloud. For the sake of disaster prevention for constructional structures such as bridge, tunnel, and other traditional buildings in the village of local heritage, we analyze status of these structures in the long term or short term period as well as disaster situations. Collecting data based on mobile cloud and analyzing future expectations based on probabilistic and statistical techniques, we implement our integrated monitoring system for constructional structures to solve these existing problems. Final results of this design and implementation are basically applied to the monitoring system for more than 10,000 structures spread over national land in Korea. In addition, we can specifically apply the monitoring system presented here to a bridge of timber structure in Asan Oeam Village and a traditional house in Andong Hahoe Village to watch them from possible disasters. Total procedure of system design and implementation as well as development of the platform LinkSaaS and application services of monitoring functions implemented on the platform. We prove a good performance of our system by fulfilling TTA authentication test, web accommodation test, and operation test using real measuring data.