• 전자공학회논문지
• /
• 제51권10호
• /
• pp.118-127
• /
• 2014

DNA 데이터 저장(Data storage)은 DNA의 염기 서열에 대용량의 디지털 데이터를 저장하는 방법으로, 차세대 정보 저장 매개물로 인식되고 있다. 본 논문에서는 DNA 스테가노그라픽 기반으로 비부호 DNA 서열(Noncoding DNA sequence)에 정보를 저장하는 방법을 제안한다. 제안한 방법은 암호화된 데이터들을 정수 변화표에 의하여 데이터 염기 서열로 변환한 후, 시드 정보, 및 섹터 길이로 구성된 은닉 키에 의하여 비부호 염기 서열에 은닉한다. 따라서 단백질의 유전 기능이 유지되고, 원 DNA 서열없이 정보가 검출되며, 변이에 의하여 발생되는 오류가 검출된다. 기존 방법과의 비교 실험을 통하여 제안한 방법이 높은 bpn를 가지는 저장 효율을 가지며, 패리티 염기에 의하여 은닉된 정보의 오류 위치를 검출할 수 있음을 확인하였다.

• Steel and Composite Structures
• /
• 제35권1호
• /
• pp.111-127
• /
• 2020

The goal of this study is to fill this apparent gap in the area about investigating the effect of porosity distributions on vibrational behavior of FG sectorial plates resting on a two-parameter elastic foundation. The response of the elastic medium is formulated by the Winkler/Pasternak model. The internal pores and graphene platelets (GPLs) are distributed in the matrix either uniformly or non-uniformly according to three different patterns. The model is proposed with material parameters varying in the thickness of plate to achieve graded distributions in both porosity and nanofillers. The elastic modulus of the nanocomposite is obtained by using Halpin-Tsai micromechanics model. The annular sector plate is assumed to be simply supported in the radial edges while any arbitrary boundary conditions are applied to the other two circular edges including simply supported, clamped and free. The 2-D differential quadrature method as an efficient and accurate numerical approach is used to discretize the governing equations and to implement the boundary conditions. The convergence of the method is demonstrated and to validate the results, comparisons are made between the present results and those reported by well-known references for special cases treated before, have confirmed accuracy and efficiency of the present approach. It is observed that the maximum vibration frequency obtained in the case of symmetric porosity and GPL distribution, while the minimum vibration frequency is obtained using uniform porosity distribution. Results show that for better understanding of mechanical behavior of nanocomposite plates, it is crucial to consider porosities inside the material structure.

• International journal of advanced smart convergence
• /
• 제9권1호
• /
• pp.185-192
• /
• 2020

The number of dementia patients in Korea is expected to increase to 3.30 million in 2050, and the cost of dementia management will increase sharply to KRW 106.5 trillion of GDP. In August 2017, the Moon Jae-in government announced the 'Dementia National Responsibility System' through a five-year plan for government operation and expanded the Dementia Peace Center nationwide. However, for this, strategic dementia-related technology development strategies should be established and given the role of government and the role of the private sector. Therefore, in order to derive the corresponding strategy, this study developed the government's 'dementia' response technology development strategy through the situation analysis from the political, economic, social, and technological perspective and the environmental (PEST) analysis of the strengths, weaknesses, opportunities, and threats (SWOT). As a result, the direction of technology development in the dementia-related medical device market is expected to become a trend of developing dementia self-measurement by developing low-cost and high-efficiency diagnostic technology products. It has been shown that the development of various products for consumers should begin. As a result, the dementia market approach strategy should be premised, the related technical support and legal restrictions should be minimized, and the education of related experts should be strengthened to solve the government's development of dementia technology and the social problems of dementia. In addition, by developing joint projects with major companies around the world and actively participating in the technology platform, it is important to naturally build up skills accumulation for the development of dementia technology and competence skills of dementia technology experts in the long term.

• 산경연구논집
• /
• 제11권5호
• /
• pp.45-52
• /
• 2020

Purpose: In the 4th industrial revolution, services that incorporate various smart technologies in the tourism sector have begun to gain popularity. Accordingly, academic discussions on smart tourism have also started to become active in various fields. Despite recent research, the definition of smart tourism is still ambiguous, and it is not easy to differentiate its scope or characteristics from traditional tourism concepts. Thus, this study aims to analyze the perception of smart tourism exposed online to identify the current point of smart tourism in Korea and present the research direction for conceptualizing smart tourism suitable for the domestic situation. Research design, data, and methodology: This study analyzes the perception of smart tourism exposed online based on 20,198 news data from portal sites over the past six years. Data on words used with smart tourism were collected from the leading portal sites Naver, Daum, and Google. Text mining techniques were applied to identify the social awareness status of smart tourism. Network analysis was used to visualize the results between words related to smart tourism, and CONCOR analysis was conducted to derive clusters formed by words having similarity. Results: As a result of keyword analysis, the frequency of words related to the development and construction of smart tourism areas was high. The analysis of the centrality of the connection between words showed that the frequency of keywords was similar, and that the words "smartphones" and "China" had relatively high connection centrality. The results of network analysis and CONCOR indicated that words were formed into eight groups including related technologies, promotion, globalization, service introduction, innovation, regional society, activation, and utilization guide. The overall results of data analysis showed that the development of smart tourism cities was a noticeable issue. Conclusions: This study is meaningful in that it clearly reflects the differences in the perception of smart tourism between online and research trends despite various efforts to develop smart tourism in Korea. In addition, this study highlights the need to understand smart tourism concepts and enhance academic discussions. It is expected that such academic discussions will contribute to improving the competitiveness of smart tourism research in Korea.

• 지식경영연구
• /
• 제18권3호
• /
• pp.1-35
• /
• 2017

This study conducted comparative study on autonomous car's industry policy and corporate strategy of US, China, Germany, Japan and Korea. By analyzing core technologies and industry paradigm shifts of autonomous car industry, I was able to figure out autonomous car has high potential to be dominant transportation in the future and it is important to construct core competency in technology area. The meaningful findings by analyzing various primary and secondary data are as followings: First, in case of US, Google was leading autonomous car industry by developing its own OS and Platform. US government has been actively supporting and interacting with private firms and Universities for stimulating industry/technology convergence and establishing standard. Second, in case of Germany, autonomous car development was leading by several auto makers such as Mercedes, BMW in Hardware and manufacturing area, and German government was focusing on deregulations for private company. Third, in case of Japan which quite similar with German situation, they were both independently developing technology and expanding alliances with MNCs. And Japanese government was supporting triple helix system construction between local companies and universities. Fourth, in case of China, autonomous car industry was leading by IT companies, and various cooperations between IT companies and automakers were established. Chinese government was regulating foreign companies and supporting domestic companies both in market and technologies Last, in Korean case, the active and extensive alliances were lacking in Korean companies while strategic and strong government supports were missing in public sector. For competing with other countries and players, more active collaboration between different countries and strong policy supports are needed in Korean auto industry.

• 한국항행학회논문지
• /
• 제16권1호
• /
• pp.89-95
• /
• 2012

본 논문에서는 U-온실 시스템에 관한 국내외 동향 및 관련 연구들을 소개한다. USN(Ubiquitous Sensor Networks)은 네트워크 및 과학기술의 발전과 함께, 사용자 중심의 물리적인 활동 공간과 가상 전자 컴퓨팅 공간의 융합으로 언제, 어디서나 주변 환경 변화에 따라 동적으로 구성된 서비스를 제공 받을 수 있는 새로운 컴퓨팅 패러다임이다. u-온실 시스템이란, IT 기술 활용이 상대적으로 미흡했던 농업 생산, 물류 및 유통관리 분야에 USN 신기술을 적용한 것이다. 이와 같이 u-IT 기술을 농업에 적용함으로써 생산량 증가, 물류 및 유통관리에 따른 비용 절감 등의 효과를 통해 농업 분야의 국제 경쟁력을 강화 할 수 있다.

• 한국정보통신학회논문지
• /
• 제18권4호
• /
• pp.920-926
• /
• 2014

본 연구에서는 지하굴착공사에서 굴착단계별 변위형상도를 미리 예측하는 기법에 관하여 역해석 알고리즘을 이용하여 현장시공사례에 적용하고 그 타당성을 검증하고자 한다. 이를 위해 IT 분야의 정보 처리 지식이 필요하고 전공융합의 필요성이 대두되어 건설 분야에 알고리즘의 적용을 시도하고자 한다. 본 연구의 기법에서 예측변위형상도는 굴착시공 시 연속벽체에 작용하는 토압과 연관이 있으며 이는 앵커 제거 후 시공하는 연속벽체의 안정성에 영향을 미치기 때문에 굴착단계별 변위형상도를 미리 예측하는 것은 아주 중요한 문제이다. 본 연구에서는 이를 위해 3곳의 지하연속벽을 사용한 현장에 반복적 역해석 알고리즘 기법을 세 단계로 적용하여 최종굴착 시 계측변위와 비교하였다. 그 결과 계측치와의 변위형상도가 잘 일치하고 있어 본 연구의 해석기법에 대한 타당성이 있음을 알 수 있었다.

• Applied Science and Convergence Technology
• /
• 제23권6호
• /
• pp.309-316
• /
• 2014

A large particle accelerator requires an ultrahigh vacuum (UHV) system of average pressure under $1{\times}10^{-7}$ Pa for mitigating the impact of beam scattering from the residual gas molecules. The surface inside the beam ducts should be controlled with an extremely low thermal outgassing rate under $1{\times}10^{-9}Pa{\cdot}m^3/(s{\cdot}m^2)$ for the sake of the insufficient pumping speed. To fulfil the requirements, the aluminum alloys were adopted as the materials of the beam ducts for large accelerator that thanks to the good features of higher thermal conductivity, non-radioactivity, non-magnetism, precise machining capability, et al. To put the aluminum into the large accelerator vacuum systems, several key technologies have been developed will be introduced. The concepts contain the precise computer numerical control (CNC) machining process for the large aluminum ducts and parts in pure alcohol and in an oil-free environment, surface cleaning with ozonized water, stringent welding process control manually or automatically to form a large sector of aluminum ducts, ex-situ baking process to reach UHV and sealed for transportation and installation, UHV pumping with the sputtering ion pumps and the non-evaporable getters (NEG), et al. The developed UHV technologies have been applied to the 3 GeV Taiwan Photon Source (TPS) and revealed good results as the expectation. The problems of leakage encountered during the assembling were most associated with the vacuum baking which result in the consequent trouble shootings and more times of baking. Then the installation of the well-sealed UHV systems is recommended.

• 디지털융복합연구
• /
• 제15권3호
• /
• pp.65-75
• /
• 2017

현재의 농업은 농촌인구 고령화 및 도시로의 인구유출로 인하여 심각한 노동력 부족을 경험하고 있으며, 다양한 경제적 문제를 안고 있다. 4G 통신의 보급으로 시작된 최근 발전 정보통신기술의 확산과 더불어 사물인터넷 기술이 새롭게 대두되며, 다양한 산업과 융합하여 혁신적인 가치를 창출하고 있다. 사물인터넷 기술과 농업의 융합으로 확장된 6차 산업으로 농업은 노동집약산업에서 IT기반의 고부가가치 융합산업으로 발전할 수 있게 되었다. 첨단 농업인 6차 산업의 핵심 구성요소인 스마트팜은 농장제어와 관련한 센서와 장치를 하나의 플랫폼으로 구성되어있으며, 최근 스마트팜은 단순한 농장제어가 아닌, 작물의 생육환경을 분석하고 환경에 맞는 생육환경데이터를 제공하는 방법으로 발전하였다. 본 연구에서는 전통적인 방법의 농업 문제점을 해결하고 생산성 향상 및 수익성 개선을 통한 농촌경제 활성화 방안으로서의 스마트 농업을 제안하고자 한다. 또한 최근의 첨단 정보통신기술이 어떻게 기업에 영향을 미칠 수 있는가에 대하여 스마트 농장을 구축하여 성공적으로 운영하는 사례 농가 인터뷰를 통하여 스마트 농업의 가능성을 살펴보고자 한다.

• 디지털융복합연구
• /
• 제18권2호
• /
• pp.439-445
• /
• 2020

본 연구는 가전제품 체험 서비스를 디자인할 때 고려해야 하는 요인들에 대한 사용자 경험 연구이다. 직원 없는 비대면 형태의 언택트(Untact) 서비스가 확대되고 있지만, 가전제품 분야에 대한 개발은 아직 초기 단계인 실정이다. 이에 본 연구에서는 스티븐 앤더슨(Stephen P. Anderson)의 감성 인터페이스 제작 모형(Creating Pleasurable Interface Model) 6가지 요인을 기반으로 설문 및 1:1 심층 인터뷰, 참여 관찰을 진행하여 가전제품 체험 서비스에 대한 사용자 경험을 측정 및 분석하였다. 연구 대상에 있어서는 언택트 서비스의 문제로 제기되는 중·장년 및 노년 계층의 디지털 소외를 고려하여 4060세대와 2030세대의 사용자 경험을 비교 연구하였다. 그 결과 신뢰성, 사용성, 유희성 측면에서 반대되는 두 세대의 만족도와 그에 대한 세부적인 내용을 확인할 수 있었다. 이에 관해 본 연구에서 제시하는 시사점이 향후 가전제품 체험 서비스를 디자인함에 있어서 전략적인 도움이 되기를 기대한다.