• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2004.11a
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• pp.703-706
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• 2004

공정기술의 발달과 컴퓨터 구조적인 발전에 의해서, 시스템의 동작속도가 기하급수적으로 증가하고 있다. 동작속도의 증가는 CMOS로 구현된 chip의 RC 특성에 의해서 timing variation 문제가 발생할 가능성이 높아지면서 테스트 비용이 전체 설계비용에서 차지하게 되는 비중이 급격하게 증가하고 있다. 따라서 온라인 테스트와 진화하드웨어 등이 테스트 비용감소를 위해서 연구되고 있다. 본 논문에서는 네트워크프로세서의 생존성을 위해서, 패킷엔진의 pipline의 각 stage사이의 clock slack borrowing을 이용해서 timing variation 문제를 자체적으로 해결할 수 있다는 것을 mixed-mode simulation을 통해서 통합 검증하였다. 또한 기존의 off-chip 진화하드웨어에 비해서 on-chip구현을 통해서 진화하드웨어의 성능향상과 메모리에 의해서 발생하는 overhead를 감소시키는 것이 가능함을 확인했다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.27 no.5C
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• pp.411-421
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• 2002

In this paper, we present a new survivor path memory management method and a dedicated hardware architecture for the design of high-speed Viterbi decoders in modern digital communication systems. In the proposed method, a novel use of k-starting node number deciding circuits enables to acheive the immediate traceback of the merged survivor path from which we can decode output bits, and results in smaller survivor path memory size and processing delay time than the previously known methods. Also, in the proposed method, the survivor path memory can be constructed with ease using a simple standard dual-ported memory since one read-pointer and one write-pointer, that are updated at the same rate, are required for managing the survivor path: the previously known algorithms require either complex k-ported memory structure or k-times faster read capability than write. With a moderate hardware cost for immediate traceback capability the proposed method is superior to the previously known methods for high-speed Viterbi decoding.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.41 no.3
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• pp.71-82
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• 2004

Recently, network model inspired by social insect behavior attracts the public attention. The AntNet is an adaptive and distributed routing algorithm using mobile agents, called ants, that mimic the activities of social insect. In this paper. we present a new hardware architecture to realize an AntNet-based routing in practical system on a chip application. The modified AntNet algorithm for hardware implementation is compared with the original algorithm on the various traffic patterns and topologies. Implementation results show that the proposed architecture is suitable and efficient to realize adaptive routing based on the AntNet.

• Journal of KIISE:Computer Systems and Theory
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• v.33 no.9
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• pp.608-614
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• 2006

The popularization of high-speed networks and the innovation of high-performance hardware/servers have enlarged the role of large-scale, highly distributed IT infrastructure. Though many criteria on the assessment of IT infrastructure can be considered, the survivability assessment is treated as the most important one due to the essential role as an infrastructure. While assessing the survivability of some given IT infrastructures, we can not only choose the best one among them but also improve their survivability by modifying their structure and security policies. In this paper, we propose a DMKB-based assessment system on the survivability of IT infrastructures, where DMKB is a kind of database which provides the known vulnerabilities and defense mechanism for many system components.

• Proceedings of the Korea Institute of Convergence Signal Processing
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• 2005.11a
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• pp.357-360
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• 2005

유전자 알고리즘(Genetic Algorithm, GA)은 자연적 진화과정에서 생존 경쟁 측면의 가장 적합한 메커니즘이다. GA를 소프트웨어로 수행하는데 큰 지연시간은 필수적이기 때문에 하드웨어 설계를 이용하여 알고리즘 실행 속도를 증가시키기 위한 많은 연구가 진행되어 왔다. 본 논문에서는 염색체의 임의의 유전인자를 기준으로 입력 받은 염색체에 대하여 GA 연산을 수행하는 유전 연산자를 설계한다. 설계된 디자인을 ARM 코어와 PLD로 구성된 Altera사의 Excalibur칩에 구현하여 동작을 검증하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.10-13
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• 2014

소나 시스템에서 정보처리기는 정보 융합, 시스템 내부 제어 및 외부 시스템 연동 등의 다양한 임무를 수행한다. 정보처리기에 고장이 발생할 경우, 소나 시스템의 운영에 치명적인 영향을 끼치게 되므로 소나 시스템의 생존성 및 신뢰성 향상을 위한 정보처리기의 이중화가 필요하다. 이에 본 논문에서는 소나 시스템을 위한 정보처리기의 이중화 방법을 제시한다. 제안하는 이중화 방법은 하드웨어 중복 및 동기식 이중화 방법을 사용하며 정보처리기 이중화 운용을 위한 master 설정 및 외부 연동 방법 등을 기술하였다.

• Journal of Digital Convergence
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• v.13 no.1
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• pp.191-203
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• 2015

IT is based industry on finance and insurance services and is essential equipment of survival for competitive on market. The importance of IT industry on finance and insurance is bigger than other industries. So, This study examinate effects of hardware and software divided by IT industry on each 6 finance and insurances. Research models are production inducing effects of Demand-Driven model, Shortage effects of Supply-Driven model finally, Leontief's price model by using data for analysis is Input-Output table for 2000~2009. Results are that IT Service effects are more impact than IT hardware effects on Finance and Insurance Service. Especially, IT service's supply shortage effects is 0.0847KWR to produce 1KRW of finance and insurance service for 2-fold increase compared to 2000. In addition, Central Bank and banking institutions of finance and insurance services are the greatest impact from IT industry. These are which is increasing to interdependence between IT industry and finance and insurance service.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.10 no.2
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• pp.27-42
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• 2015

The aim of this research is to investigate the difference in the capturing opportunities for each type of venture companies in the industry undergoing competition of a dominant design and then figure out the reason why they can be successful. Existing studies on venture companies are focused on the way to enhance a firm's competencies by acquiring and combining its resources. However, it is important for startups which have a lack of resources and capabilities to capture the opportunity to survive by understanding a changing environment. This study is focused on opportunity capture and strategic response to a changing environment and attempts to select and observe startup companies which are able to capture the opportunity and enter the market in the industry undergoing dominant design competition. In order to find out its difference in different types of business, we select one case from hardware startups and the other from software startups. According to the result of this study, the hardware startup focuses on market extension by lowering their prices and the software startup strives to induce more users to participate by the universalization of enabling technology so as to extend and standardize their technology in the environment undergoing dominant design competition. This feature of environment leads the difference in the approach for successfully capturing opportunity and thus hardware firms need to recognize the opportunity with profit potential from relationship with a number of cooperative firms while software firms need to identify the opportunity for extension of enabling technology which can be used by many users.

• The KIPS Transactions:PartA
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• v.12A no.1 s.91
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• pp.1-6
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• 2005

This paper presents a new algorithm on low power survivor path memory implementation of the trace-back systolic array Viterbi algorithm. A novel idea is to reuse the already-generated trace-back routes to reduce the number of trace-back operations. And the spurious switching activity of the trace-back unit is reduced by making use of a clock gating method. Using the SYNOPSYS power estimation tool, DesignPower, our experimental result shows the average $40{\%}$ power reduction and $23{\%}$ area increase against the trace-back unit introduced in [1].

• Journal of Information Management
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• v.18 no.2
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• pp.59-92
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• 1985

이윤추구(利潤追求)를 목적(目的)으로 하는 유기적(有機的) 결합체(結合體)인 기업(企業)에 있어서 오피스의 생산성(生産性)을 향상(向上)시키기 위해서는 통합적(統合的)인 정보관리(情報管理)시스템의 확립(確立)이 급선무(急先務)이다. OA의 본질(本質)은 오피스에 있어서 정보(情報) 생산성(生産性)의 효율향상(效率向上)에 있다. OA의 출현이후(出現以後) 기업(企業)은 아직도 정형정보처리(定型情報處理)의 하드웨어지향적(指向的)이며 비지니스 토큐먼트 등과 같은 비정형정보처리(非定型情報處理)에는 그다지 관심(關心)을 기울이지 않았다. 제4(第四)의 자원(資源)인 정보(情報)의 정보력(情報力)은 개인(個人)이나 기업(企業)에 있어서 생존전략(生存戰略)의 기반(基盤)이며 정보력(情報力)의 강화(强化)가 항상 필요(必要)하다. 이것을 늘 유지(維持)하기 위해서는 정보센터의 설치(設置)와 $\ulcorner$동적(動的) 온라인 정보(情報)시스템$\lrcorner$의 구축(構築)이 필요(必要)하다. 보고(本稿)는 Journal of Micrographics 27권 7호(1984)로부터 계속하여 연재(連載)되었는데 기업(企業)에 있어서 OA, 비정형정보(非定型情報)의 관리(管理)와 활용방법(活用方法)에 대해 관심(關心)이 있는 이에게 도움이 될 수 있으리라고 사료(思料)되어 총(總) VI장(章)으로 구성(構成)되어 있는 중에서 금회(今回)에는 $I{\sim}III$ 장(章)을, 다음 회(回)에는 IV장(章)부터 VI장(章)까지 편역(編譯)키로 하였다.