• Journal of Positioning, Navigation, and Timing
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• 제5권1호
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• pp.37-45
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• 2016

In this paper, design and implementation issues for a network-oriented RF emitter localization system with array antenna are discussed. For hardware, the problem of array mismatch and RF/IF channel mismatch are introduced and the calibration schemes for solving those problems are also provided. For software, it is explained how to overcome the drawback of conventional MUltiple Signal Identification and Classification (MUSIC) algorithm in a point of identifying the number of received signals and problems such as Data Association Problem and Ghost Node Problem in regard to multiple emitter localization are presented with some approaches for getting around those problems. Finally, for implementation, a criterion for arranging each of sensors and a requirement for alignment of array antenna' orientation are also given.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권2호
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• pp.829-842
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• 2018

Unmanned Aerial Vehicle (UAV) is diversely utilized in our lives such as daily hobbies, specialized video image taking and disaster prevention activities. New ways of UAV application have been explored recently such as UAV-based delivery. However, most UAV systems are being utilized in a passive form such as real-time video image monitoring, filmed image ground analysis and storage. For more proactive UAV utilization, there should be higher-performance UAV and large-capacity memory than those presently utilized. Against this backdrop, this study described the general matters on proactive software platform and high-performance UAV hardware for real-time target tracking; implemented research on its design and implementation, and described its implementation method. Moreover, in its established platform, this study measured and analyzed the core-specific CPU consumption.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1992년도 봄 학술발표회 논문집
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• pp.79-84
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• 1992

An integrated design system has as its aim the incoporation of all the design processes, such as, planning, preliminary design, analysis, detailed design (mamber design), evaluation, and drafting into an unified software system. Successful implementation such a system could lead to major improvements in efficiency by eliminating duplication of data and efforts. reducing errors, saving design time, providing management support, and so on. This study presents a methodology for an computer-integrated design system for building structures, synthesizing algorithmic procedures and knowledge based expert systems on the network database. Network database, which was designed to store all information systematically during the design processes, provides centeral communication area between algorithms and expert systems. The conventional procedural codes automate the routine design phases such as structural analysis, whereas knowledge-based expert systems support designer's decisions at the creative design phases such as preliminary design etc. The user interface with interactive and batch modes controls the design phases and manages design information and activates the algorithms and the expert systems. The concept presented in this paper will contribute to the formulation of automated design systems for building structures.

• 정보처리학회논문지A
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• 제8A권1호
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• pp.1-8
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• 2001

This paper describes the design and implementation of C standard library for real-time operating system Q+, that is being developed for the internet appliance. The C library in the real-time operating system should be defined according to the standard interface and support the concurrent execution of threads. The implemented C standard library is reentrant and follows POSIX.l standard interface. And, the C standard library functions, which are adequate to the Q+ application and commonly provided by commercial real-time operating systems, are selected among POSIX.l standard functions. The C standard library is implemented on the Q+ kernel and D-TV set-top box according to the implementation sequence, which is determined by analyzing the relation of function calls.

• 정보보호학회논문지
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• 제20권1호
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• pp.113-121
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• 2010

시스템 명세 기법은 시스템의 구조와 행위특성을 형식적인 표현을 통해 제시하기위해 사용되는 시스템 이론 기반의 정형화된 표현 기법이다. 시스템 명세 기법을 시스템의 설계 단계에서 활용할 경우, 계층적이고 모듈화된 시스템에 대한 정의와 유지보수의 용이성 확보가 가능하여 합리적인 개발이 가능하게 된다. 본 연구에서는 개인정보 사용의 위험 상황을 모바일 장치를 이용하여 정보의 소유자에게 알려주고, 이에 대한 응답을 관리하는 기술을 제시하고 있다. 특히, 모바일 장치가 갖는 제약사항을 해결하기 위한 메시지의 형식을 정의하여 제시하였다. 본 기술이 적용된 알람 시스템은 계층적이고 모듈화된 형태로 모델링하기 위해 시스템명세를 기반으로 하였다. 또한, 시스템 명세화 기법 기반의 설계를 통해 알람시스템을 개발하고 본 시스템의 효율성을 검증 하였다. 본 논문의 기여도는 시스템명세기법을 사용한 개인정보 유출상황의 유연성 있는 표현과 관리를 가능하게 한 시스템의 설계 및 구현에 있다.

• 디지털융복합연구
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• 제10권3호
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• pp.149-154
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• 2012

본 논문은 Seam 프레임워크 환경에서 안드로이드 스마트폰 기반의 모바일 웹앱 오피스 JPetStore 주문시스템의 설계 및 구현을 하는데 목적이 있다. 현재까지 경량 컨테이너 아키텍처로 현업에서 많이 잘 알려진 아키텍처로 Seam 프레임워크가 있다. 그러나 Seam 프레임워크 환경에서 모바일 웹앱 오피스의 분석 및 설계를 통한 구현 사례는 없었다. 따라서 본 연구에서는 Seam 환경에서 안드로이드 기반으로 모바일 웹앱 오피스 JPetStore 주문시스템을 분석 및 설계한 후 구현함으로써 모바일 웹앱 오피스의 개발을 위한 참고 방향을 제공하고자 한다.

• 한국정보처리학회논문지
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• 제7권5S호
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• pp.1609-1619
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• 2000

Workflow means the automation of a business process, in which documents, information or tasks are transferred among participants for business action according to a set of procedural rules, and workflow management system is a system which defines, creates and manages the execution of workflow running one or more workflow engines. In this research, necessity of standardizing current workflow systems is recognized, and problems such as interoperability of current systems, dynamic adaptation to changing business environment and lacking of assessment, management and auditing of business processes are analyzed so that the design and implementation of a workflow system is focused on to offer a solution to the problems. The system is designed and implemented to change dynamically on Run-Time the processes definition defined on Build-Time, and interoperability is enabled by developing workflow engine and related modules based on the WfMC specifications and APIs.

• 대한전자공학회논문지
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• 제24권3호
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• pp.387-393
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• 1987

The introduction of a digiral subscriber loop transmission system necessitates an optimized line interface solution. To meet this objective an adaptive line equalizer has been developed. The equalizer can be compensated up to 42 dB line loss at 200KHz, and operated up to 3.2 Km transmission length (0.4 mm\ulcornercable)at a rate of 400Kb/s. This has been builted using a variable \ulcorner equalizer to compensate a frequency-attenuation characteristics of metallic cable, an AGC (automatic gain control) circuits with simple control algorithm, and various filters to minimize a transmission constraints over subscriber loop. The purpose of this paper is to present a short description of a design of the adaptive line equalizer with a summary of implementation results. Some design concepts and considerations which results in an implementation of the equalizer are also given.

• Journal of Information Technology Applications and Management
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• 제12권1호
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• pp.157-172
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• 2005

Recently, location-based service (LBS) is a hot issue in the field of computer applications. So many papers introducing new techniques of implementing a LBS and new application fields of LBS have been published recently. However, to the best of our knowledge, none of them discusses feasibility test in the prior to the implementation. The importance of a feasibility test for a design prior to the implementation cannot be overemphasized. This paper presents a method of feasibility test for a LBS design. Our method performs three steps. At the first step, we build a Petri net model of the LBS system which is depicted in natural language. The second step is to analyse the Petri net to find errors and flaws in the design. We also improve the Petri net model by fixing the errors and flaws in this step. A feasibility test is the third and final step. In this step. we verify if the design satisfies the user's requirement in the senses of quality of service (QoS) and of minimizing the implementation cost. The third step is performed in the manner of mathematical analysis of the Petri net.

• 한국IT서비스학회지
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• 제6권3호
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• pp.195-207
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• 2007

This study describes the design and implementation of web based collaborative learning system to improve interactivity among learners. Based on suggestions from previous studies, the system is composed of three main parts : the community module, the learning module, and the administrative module. The study participants were 254 university students from two different institutions. They were divided into 43 groups and asked to complete an online TOEIC preparation module using the learning system over 4 weeks. Survey data were collected at three points from each participant-before and 3 weeks after the beginning of the online module and at the completion of the module. The result indicates that the usage of this system is positively related to the learners' collaborative learning activities, the level of sense of community, and learner satisfaction both at the individual and group levels.