• 벤처창업연구
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• 제9권3호
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• pp.63-74
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• 2014

1950년대부터 선진국을 중심으로 세계 도처에서 기술혁신과 사업화를 위한 수단으로서 과학 단지가 조성되기 시작하였다. 우리나라 역시 1980년대 이후 기술혁신을 위한 R&D의 양적 투자 확대를 시작으로 지금까지 지속적인 노력의 결과, 특허 창출 수준은 이미 세계 10위권 이내에 위치한다. 하지만 국내 기술무역수지 등을 통해 나타나는 현재의 기술경쟁력 수준은 선진국에 비해 매우 미흡한 현실이다. 이는 곧 투입된 재원에 비해 경제적 가치 창출이 저조하다는 것을 의미하며 기술을 통해 경제적 가치를 확보하기 위한 방안이 요구되고 있다. 현재 우리나라 전국에 걸쳐 설치된 10개의 과학연구단지는 지역의 산업고도화와 지역경제의 성공적인 활성화를 위한 R&D 수행에 어려움을 겪고 있다. 이에 따라 본 연구에서는 유사하지만 차이점이 있는 '과학 단지'의 개념을 정리하고, 지역혁신체제(RIS)의 이론을 토대로 각기 유사한 기능을 수행하고 있는 기관 및 단지를 비교 분석하여 각자에 부합 또는 적합한 임무 구분을 시도한다. 또한 이를 통해 우리나라 혁신시스템의 약점을 보완하고 관련된 각 기관의 역량 극대화와 동시에 시장 선도를 가능하게 하는 기초원천 기술을 효과적으로 활용할 수 있는 방안을 도출하고자 한다.

• 무역상무연구
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• 제38권
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• pp.123-152
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• 2008

It is a basic rule in the credit law that original documents are required unless otherwise stipulated by the credit. Due to modern technology enabling documents to be produced in many ways it may not always to decide whether a document is original or a photocopy. In consideration of modern technology and the advent of new methods of document production, ICC has drawn up the provisions on original documents in Article 22 (b) of UCP 400 for the first time. The equivalent provision in UCP 500 is Article 20 (b). As a result of many queries to ICC Banking Commission on what constitutes an "original" documents under UCP 500 and several court cases in connection with original documents, the ICC Banking Commission has issued Decision on original documents in July 1999. Based on this Decision, the ICC dealt it in Article 17 under UCP 600 which came into force on July 1, 2007. There are some changes, replacements and new provisions of UCP 600 concerning original documents and copies. Importers, exporters, insurance companies, other third parties and, above all, banks should pay attention to some changes and implications of UCP 600 concerning original documents and copies. The purpose of this paper is to examine the provisions on original documents and copies under UCP 600. For this purpose, firstly this study deals with the relative provisions on original documents and copies under pre-UCP 600. Secondly this study considers the provisions on original documents and copies under UCP 600. Thirdly this study compares the provisions under pre-UCP 600 with the provisions under UCP 600. Finally this study analyzes the cases decided both home and abroad in connection with original documents. This paper contribute to help the parties to letters of credit to understand the provisions on original documents and copies under UCP 600.

• 기술혁신연구
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• 제12권1호
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• pp.161-188
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• 2004

The objective of this research is to evaluate the Creative Research Initiative Program (CRI), a national R＆D program funded by the Ministry of Science ＆ Technology in Korea. The evaluation of CRI covers the following research questions; 1) Have it set a unique position and characteristic distinguished from other government-funded R＆D programs\ulcorner 2) Are the achievements of the program relevant to its goal\ulcorner 3) What is its performances and how much is it achieved its goal\ulcorner The results are the followings; 1) CRI is perceived as a pure basic research, distinguished from other national basic research programs, such as the Coal Oriented Basic Research Program and the SRC and ERC. 2) CRI is a well-adapted R＆D program in confront of the environmental changes and R＆D needs, as well as follows the planned R＆D areas. 3) CRI have performed well in the raising-up world-class research leaders and the nation-wide diffusion of creative R＆D culture, while it got few performances in the overcoming the limitation of the existing technologies and the independent development of original key technologies for future industries. However, the duration of the program, 5 year, is too short to expect concrete outcome, such as creating original technologies. Many of the outcomes of CRI gets a lot of attention from top class scientists in the world, it is expected to generate various R＆D performances in the future.

• 디지털산업정보학회논문지
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• 제9권4호
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• pp.103-110
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• 2013

In Information Technology era, various amazing IT technologies, for example Big Data, are appearing and are available as the amount of information increase. The number of counselling for violation of personal data protection is also increasing every year that it amounts to over 160,000 in 2012. According to Korean Privacy Act, in the case of treating unique personal identification information, appropriate measures like encipherment should be taken. The technologies of encipherment are the most basic countermeasures for personal data invasion and the base elements in information technology. So various cryptography algorithms exist and are used for encipherment technology. Therefore studies on safer new cryptography algorithms are executed. Cryptography algorithms started from classical replacement enciphering and developed to computationally secure code to increase complexity. Nowadays, various mathematic theories such as 'factorization into prime factor', 'extracting square root', 'discrete lognormal distribution', 'elliptical interaction curve' are adapted to cryptography algorithms. RSA public key cryptography algorithm which was based on 'factorization into prime factor' is the most representative one. This paper suggests algorithm utilizing telescoping series as a safer cryptography algorithm which can maximize the complexity. Telescoping series is a type of infinite series which can generate various types of function for given value-the plain text. Among these generated functions, one can be selected as a original equation. Some part of this equation can be defined as a key. And then the original equation can be transformed into final equation by improving the complexity of original equation through the command of "FullSimplify" of "Mathematica" software.

• 디자인학연구
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• 제13권4호
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• pp.57-66
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• 2000

우리나라의 자동차 산업은 최초의 고유모델 포니 이후 25년의 시간동안 빠른 성장을 보이며 많은 고유모델 차량을 개발하였다. 초기에는 외부 디자이너에게 의존하는 형태에서 시작되었으나, 점차로 기술개발의 독자성을 확보하게 되어, 다양한 차종의 고유모델을 개발하게 되었으며, 품질도 향상되어 자동차는 우리나라의 주요 수출품목이 되었다. 외부 디자이너에 의하여 시작된 고유모델 디자인이 점차로 우리나라만의 독자성을 가지는 디자인으로 탈바꿈되는 과정 속에 있는 것이 최근의 경향이라고 할 수 있다. 초기에서부터 개발되어온 고유모델 차량의 차체 조형 개념은 크게 네 가지 유형으로 나누어 분석할 수 있는데, 이들의 유형은 각기의 특성과 성격을 가지고 있다. 우리나라의 고유모델 차량 개발 과정은 도입기, 정착기, 발전기, 그리고 성숙기로 나누어 볼 수 있는데, 각 시기에 개발된 차종은 디자인 주체, 그 시기의 국내 기술여건, 시장 상황 등을 반영하여 다양한 조형 양식을 보여주고 있다. 그런데 이들 조형 양식은 발전기와 성숙기를 거치면서 두 가지의 유형으로 압축되고 있다. 이러한 경향은 기술개발에 의한 요인이 크겠지만, 시장에서의 소비자들의 성향을 반영한 것 역시 큰 요인으로 분석된다. 향후의 고유모델 개발에서는 이러한 조형성의 특징 변화를 보다 명확히 인식하고, 독자적인 지향성을 가지는 차체 조형 개념에 의한 작업이 이루어져야 한다.

• 한국통신학회논문지
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• 제29권1C호
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• pp.166-174
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• 2004

대리서명은 원서명자가 자신의 서명 권한을 대리 서명자에게 위임하여 대리 서명자가 원서명자를 대신해서 서명을 생성하는 것을 말한다. 대리서명은 원서명자가 위임 정보에 대한 서명을 생성하고 이를 위임자에게 전달하여 위임자가 위임키로서 사용하게 하는 것이다. 본 논문에서는 원서명자와 대리서명자가 기존의 인증서를 발급 받은 환경에서 원서명자가 대리서명자에 대하여 검증자에계 위임정보를 등록하는 프로토콜을 제안한다. 위임내용에 대해 원서명자가 디지털 서명을 하고 검증자는 이에 해당하는 내용을 검증한 후 위임서명자에 대한 권한, 기간 등의 제약사항을 설정하고 허가된 범위 내에서 위임 서명을 한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권3호
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• pp.1298-1310
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• 2019

Network coding (NC) is a promising technology that can improve available bandwidth and packet throughput in wireless sensor networks (WSNs). Sliding window is an improved technology of NC, which is a supplement of TCP/IP technology and can improve data throughput and network lifetime on WSNs. This paper proposes a network coding-based maximum lifetime algorithm for sliding window in WSNs (NC-MLSW) which improves the throughput and network lifetime in WSN. The packets on the source node are sent on the WSNs. The intermediate node encodes the received original packet and forwards the newly encoded packet to the next node. Finally, the destination node decodes the received encoded data packet and recovers the original packet. The performance of the NC-MLSW algorithm is studied using NS2 simulation software and the network packet throughput, network lifetime and data packet loss rate were evaluated. The simulations experiment results show that the NC-MLSW algorithm can obviously improve the network packet throughput and network lifetime.

• Journal of information and communication convergence engineering
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• 제4권2호
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• pp.71-74
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• 2006

A basic access method about IEEE 802.11 MAC layer protocol using IEEE 802.11 wireless LANs is the DCF thatis based on the CSMA/CA. But, cause of IEEE 802.11 MAC layer uses original backoff algorithm (exponential backoff method), when collision occurred, the size of contention windows increases the double size Also, a time of packet transmission delay increases and efficienty is decreased by original backoff scheme. In this paper, we have analyzed TCP packet transmission time of IEEE 802.11 MAC DCF protocol for wireless LANs a proposed enhanced backoff algorithm. It is considered the transmission time of transmission control protocol (TCP) packet on the orthogonal frequency division multiplexing (OFDM) in additive white gaussian noise (A WGN) and Rician fading channel. From the results, a proposed enhanced backoff algorithm produces a better performance improvement than an original backoff in wireless LAN environment. Also, in OFDM/quadrature phase shift keying channel (QPSK), we can achieve that the transmission time in wireless channel decreases as the TCP packet size increases and based on the data collected, we can infer the correlation between packet size and the transmission time, allowing for an inference of the optimal packet size in the TCP layer.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2006년도 춘계종합학술대회
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• pp.530-533
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• 2006

Recently, a basic access method about IEEE 802.11 MAC layer protocol using IEEE 802.11 wireless LANs is the DCF thatis based on the CSMA/CA. But, cause of IEEE 802.11 MAC layer uses original backoff algorithm (exponential backoff method), when collision occurred, the size of contention windows increases the double size. Also, a time of packet transmission delay increases and efficiency is decreased by original backoff scheme. In this paper, we have analyzed TCP packet transmission time of IEEE 802.11 MAC DCF protocol for wireless LANs a proposed enhanced backoff algorithm. It is considered the transmission time of transmission control protocol (TCP) packet on the orthogonal frequency division multiplexing (OFDM) in additive white gaussian noise (AWGN) and Rician fading channel. From the results, a proposed enhanced backoff algorithm produces a better performance improvement than an original backoff in wireless LAN environment. Also, in OFDM/quadrature phase shift keying channel (QPSK), we can achieve that the transmission time in wireless channel decreases as the TCP packet size increases and based on the data collected, we can infer the correlation between packet size and the transmission time, allowing for an inference of the optimal packet size in the TCP layer.

• 대한치과기공학회지
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• 제34권1호
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• pp.45-56
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• 2012

Purpose: This study reviews the recent trend of Korean Academy of dental technology research. The data examined are the articles published in the Korean Journal of Korean Academy of dental technology from 1979 to 2011. Methods: The data are retrieved through the internet database Korean Academy of dental technology. The number of paper published is 540, published in 33 volumes of the journal. This study examines research methods, subjects, and author information. Results: Among the 540 articles collected, 422 are Original papers, 106 Clinical Technical Papers, 12case Other papers. 235 are experimental studies. Most experimental studies(235) have examined the ceramic(Porcelain) parts(117). The sole author of 315, co-author of 225 appeared. In turn of dental technicians, and students appeared. Conclusion: The study is to present basic data for research and to indicate the direction of their study in the future.