• Journal of Digital Convergence
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• v.20 no.5
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• pp.61-68
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• 2022

This study examines the impact of consumers' subjective perception on the quality loyalty of the Internet of things, explores academic innovation schemes, and puts forward business strategies for on-site optimization of the industry. The research methods use online survey methods for Chinese consumers who have used or bought Xiaomi IoT products. The results show that the inherent attributes of Internet of things products have an impact on brand image, and brand image has an impact on customer loyalty. Brand image shows complete media effect in the relationship between hyper-connectivity and customer loyalty of Internet of things products. For the enterprises that develop the Internet of things, obtaining the perceived brand image has a very important strategic significance in expanding the loyal customer base.

• Convergence Security Journal
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• v.22 no.1
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• pp.129-134
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• 2022

A smart platform is defined as an evolved platform that realizes physical and virtual space into a hyper-connected environment by combining the existing platform and advanced IT technology. The hyper-connection that is the connection between information and information, infrastructure and infrastructure, infrastructure and information, or space and service, enables the realization and provision of high-quality services that significantly change the quality of life and environment of users. In addition, it is providing everyone with the effect of significantly improving the social safety net and personal health management level by implementing smart government and smart healthcare. A lot of information produced and consumed in these processes can act as a factor threatening the basic rights of the public and individuals by the informations themselves or through big data analysis. In particular, as the smart platform as a core function that forms the ecosystem of a smart city is naturally and continuously expanded, it faces a huge security burden in data processing and network operation. In this paper, platform components as core functions of smart city and appropriate security threats and countermeasures are studied.

• Journal of the Korea institute for structural maintenance and inspection
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• v.27 no.2
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• pp.50-57
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• 2023

Autonomous driving technologies have been gradually improved for road traffic owing to the development of artificial intelligence. Since the truck platooning is beneficial in terms of the associated transporting expenses, the Connected-Automated Vehicle technology is rapidly evolving. The structural performance is, however, rarely investigated to capture the effect of truck platooning on civil infrastructures.In this study, the dynamic behavior of bridges under truck platooning was investigated, and the amplification factor of responses was estimated considering several parameters associated with the driving conditions. Artificial intelligence techniques were used to estimate the maximum response of the mid span of a bridge as the platooning vehicles passing, and the importance of the parameters was evaluated. The most suitable algorithm was selected by evaluating the consistency of the estimated displacement.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.34 no.2
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• pp.281-288
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• 2024

The sixth generation(6G) wireless communication technology is advancing toward ultra-high speed, ultra-high bandwidth, and hyper-connectivity. With the development of communication technologies, the formation of a hyper-connected society is rapidly accelerating, expanding from the IoT(Internet of Things) to the IoE(Internet of Everything). However, at the same time, security threats targeting IoT devices have become widespread, and there are concerns about security incidents such as unauthorized access and information leakage. As a result, the need for security-enhancing solutions is increasing. In this paper, we implement an autoencoder-based anomaly detection model utilizing real-time collected network traffics in respond to IoT security threats. Considering the difficulty of capturing IoT device traffic data for each attack in real IoT environments, we use an unsupervised learning-based autoencoder and implement 6 different autoencoder models based on the use of noise in the training data and the dimensions of the latent space. By comparing the model performance through experiments, we provide a performance evaluation of the anomaly detection model for detecting abnormal network traffic.

• Proceedings of the Korean Vacuum Society Conference
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• 2015.08a
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• pp.231.2-231.2
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• 2015

본 연구에서는 나노갭 소자에 미세유체 수직 이중층을 도입하여 상층에 존재하는 금나노입자를 검출하였다. 형성된 수직 이중 층의 상층에는 검출물질을 주입하였고 하층에는 검출물질과 소자 표면의 전극을 분리 시킬 수 있는 용액을 주입하였다. 수직 이중층의 형성은 크로노암페로메트리(Chronoamperometry)을 이용하여 상층에 흘려준 electrochemical indicator 인 ferricyanide 용액의 전기화학 신호가 발생되지 않음을 통해서 확인하였다. 연속적인 수직 이중 층의 흐름에서 유전영동법을 이용하여 상층에 존재하는 금나노입자들을 나노갭전극으로 유도포획 하였고 이때 실시간으로 변하는 전류 값으로부터 금나노입자의 검출여부를 판단하였다.

• Journal of the Korean institute of surface engineering
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• v.15 no.3
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• pp.138-145
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• 1982

The effects of the simultaneous variations of the ratio of feed gases(H2/N2 Flow ratio), feed gas flow rate (H2/N2, total-flow rate) and partial pressures of TiCl4 (PTiCl41) as well as deposition time and cobalt content of the substrate on the deposition rate of the TiN Coated Cemented Tungsten Carbide Tools were investigated. Deposition was carried out in the temperature range of 930$^{\circ}C$-1080$^{\circ}C$ and an activation energy of 46.5 Kcal/mole can be calculated. Transverse rupture strength was noticeably reduced by the TiN coating on the virgin surfa-ce of Cemented Tungsten Carbide, the extent of which was decreased according to the coa-ting thickness. Microhardness value observed on the work was in the range of 1700∼2000kg/mm, which were in well agreement with the value of bult TiN. The wear resistance of TiN layers was performed by turning test and it was observed that crater and flank resistance remarkably enhanced by TiN coating.

• Electronics and Telecommunications Trends
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• v.29 no.4
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• pp.82-90
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• 2014

우리 사회는 산업혁명, 정보화혁명을 거쳐, 모든 것이 인터넷과 연결되는 사물인터넷(Internet of Things) 기반의 초연결 혁명 진행 중에 있다. 이에 정부는 사물인터넷을 공공, 산업, 개인 등 국가사회 현안 해결의 수단으로 활용하여 산업경쟁력 강화 및 창의적 IoT 서비스 제품 창출과 중소 중견 전문기업 육성을 시도하고 있다. 이에 본고에서는 사물인터넷의 핵심인 단말 플랫폼기술에 대한 글로벌 기업 및 프로젝트들의 하드웨어와 소프트웨어 융합기반 사업화 동향을 분석하고, 국내 단말 플랫폼의 개발현황 및 문제점을 살펴본다. 뿐만 아니라, 향후 사물인터넷의 단말 플랫폼 경쟁력 확보 및 생태계 구축을 위한 단말 소프트웨어 플랫폼과 하드웨어 플랫폼 구축방법으로 개발자 지향 개방형 SW-SoC(System on Chip) 융합을 통한 인프라 구축방안 제시하고, 사물인터넷 서비스의 확산을 위해 산 학 연 협력기반 기술개발 로드맵 방향을 제시한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2007.12a
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• pp.173-175
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• 2007

부산신항 남컨 배후지준설토 투기장은 국제도시 부산의 관문이 될 부산신항만 입구부에 위치한 관계로 아름답고 튼튼한 호안이 될 수 있도록 하고, 입찰안내서에 제시된 호안법선변경 금지, 호안마루높이 DL.(+)7.50m 유지 조건을 준수하면서 최적의 구조물이 되도록 하였다. 본사업지는 지형적 특성상 복잡한 형태의 고파랑 작용으로 수리학적으로 월파, 반사파, 연파를 제어하는 경사호안 구조물을 도입하였고, 초연약지반이 대심도로 분포하는 특성을 고려하여 개선된 S.C.P 연약지반 처리공법을 적용하여 기초굴착 없는 친환경적이고 배수기능을 향상시킨 융기토 유용형 S.C.P공법을 적용하였다. 호안전구간은 친수개념을 도입하였으며, 호남도 주변 해양생태계 보호를 위하여 미티게이션(mitigation) 개념을 도입하여 환경복원 계획 및 생태형 친수호안을 구상하였다.

• Information and Communications Magazine
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• v.31 no.7
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• pp.59-65
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• 2014

최근 사물 인터넷(Internet of Things)에 대한 관심은 가히 폭발적이라 할 수 있으며 주변의 모든 사물들이 연결되어 다양한 서비스를 제공하는 초연결 사회(Hyper Connected Society)에 대한 기대감이 어느 때보다 커지고 있다. 이러한 사물 인터넷을 활성화하기 위해서는 다양한 사물의 개발이 선행되어야 하는데 오픈소스 하드웨어를 이용하여 손쉽게 아이디어를 실현화할 수 있는 ICT DIY(Do It Yourself)는 중요한 역할을 할 것으로 판단된다. 그러나 ICT DIY로 개발된 디바이스가 인터넷이나 모바일 서비스와 연결되지 못하면 취미 이상으로 발전하기 어려우며, 이러한 상황을 극복하기 위해서는 다양한 IoT 플랫폼과의 연동이 필수적이다. 본 고에서는 현재까지 제안된 대표적인 IoT 플랫폼을 전용(proprietary) 플랫폼과 개방형(open) 플랫폼으로 구분하여 각각의 사례와 특장점을 분석하였다. 이를 통해 ICT DIY 개발이 단지 취미에 머물지 않고, 사물 인터넷의 중요한 접근 방안으로 인정받기 위해 IoT 플랫폼 기술을 어떻게 활용해야 하는지 살피고 향후 국내의 사물 인터넷 산업을 발전시켜 나갈 방안을 모색하고자 한다.

• Proceedings of the Korean Geotechical Society Conference
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• 2005.10a
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• pp.425-428
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• 2005

To resolve land demand by the development of various industries and the cityward tendency of population, the construction of ultra-soft ground that is unused in the past has been progressing with activity. The ultra-soft ground has very small shear strength and large deformation, so leads to many problems in ground improvement in construction. In order to dispose of these problems, it is necessary to develope the chemical materials that can be applied to the surface stabilization of ultra-soft ground. In this study, the new ground treatment that is using cement and SCS is compared, analyzed with existing ground treatment. In addition, through the laboratory tests that check the characteristic of congealment and strength, the application of SCS in field is affirmed.