• 한국전자통신학회논문지
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• 제16권2호
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• pp.363-370
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• 2021

외곽 침입감지 시스템은 물리 보안에 있어서 중요한 비중을 차지하고 있다. 본 연구에서는 외곽 침입감지를 위해 IoT 환경에서 적용할 수 있는 MEMS 센서를 활용한 초소형 스마트 디바이스를 개발하고 그 성능을 평가하였다. 본 연구에서 개발한 스마트 디바이스를 적용한 외곽 침입감지 시스템은 다양한 재질, 형태의 철조망이 도심, 바닷가, 산속 등 다양한 설치환경에 설치되어 외부의 침입과 그 위치를 감지할 수 있을 뿐 아니라, 오경보율과 구축비용 등을 최소화할 수 있는 스마트 센서로 국가 및 민간 주요 시설의 외각 침입 감지 위해 활용될 수 있을 것으로 기대한다.

• Elastomers and Composites
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• 제55권4호
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• pp.300-305
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• 2020

In recent times, polymeric foams have been popularly used in various applications. To meet the demand for these applications, polymer foams with excellent mechanical and thermal properties are required. In particular, silicone foam has gained significant attention owing to its superior thermal properties and low density. In this study, the mechanical and thermal properties of silicone foams filled with wollastonite were investigated. A maximum tensile strength of 98.3 kPa was obtained by adding 15 phr of wollastonite. The specific gravity did not exhibit a marked difference up to 10 phr, but it increased substantially above 15 phr wollastonite. Thermogravimetric analysis indicated that adding wollastonite to the silicone foam increased both the amount of residue and the thermal decomposition temperature. The morphologies of the silicone foams filled with wollastonite were observed by scanning electron microscopy.

• 융합경영연구
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• 제8권3호
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• pp.1-8
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• 2020

Purpose: Korea has a long history of kid's content industries. Also, Korea's kid's content market has been thriving for a long time, but recently, a company called Smart Study has sharply raised Korea's status because of its competitive advantage and capability in the kid's content industry. Research design, data and methodology: This research has explored and examined how Smart Study was successful in kid's content industries. Also, the research examined the present and potential competitors in the kid's content industry. Results: We investigated and explored how they were different from other Korean kid industries through value, rare, inimitability, and organization (VRIO) framework. Conclusions: One of the primary reasons for their success is because Smart Study has strengths in marketing that brand character and making consumers loyal to the company. Lastly, this paper attempted to explain how they have promoted their company and investigated how other companies promote themselves in the kid's content industry. This paper has limitations. We could not explain all the fields of kid content. The kids' content has developed tremendously, but there are many hidden parts. It has been successful in Korea and is still growing and proliferating. Also, there is a slight lack of scarcity in distribution methods.

• 한국항공우주학회지
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• 제50권4호
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• pp.233-240
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• 2022

스마트무장은 종말 유도조종을 통해 정밀타격 임무를 수행하는 초소형 유도무기로 미래 전장환경의 신무기체계이다. 하지만 크기로 인한 구조적 제한으로 인해 압전구동 방식의 조종날개를 이용해 제어를 수행하기 때문에 기동력이 작아 유도범위가 제한적이다. 본 논문에서는 스마트무장의 효과도를 높이기 위한 비 표준조건 사격제원 산출 알고리즘을 제안한다. 제안된 알고리즘은 획득한 전장환경 정보를 이용해 표준조건에서의 사격제원을 보정해 비 표준조건의 사격제원을 산출한다. 다양한 조건에서의 수치 시뮬레이션을 통해 제안된 알고리즘의 성능을 검증하였다.

• 스마트미디어저널
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• 제13권5호
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• pp.26-32
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• 2024

본 논문은 스마트 글래스 기반 응급원격의료지도 시스템을 제안한다. 여기서, 원격의료지도 시스템이란 병원의 전문의사가 현장의 해양경찰이나 응급구조사에게 원격의료지도를 수행할 때 사용하는 시스템을 의미한다. 시스템 개발에 필요한 요구사항을 파악하기 위해 관련 기술 동향 및 사례를 분석하였다. 분석을 바탕으로 3가지 시스템 요구사항(1. 환자 수송의 필요성을 결정할 수 있어야 함, 2. 병원으로 수송 중 응급 의료 제공에 도움을 주어야 함, 3. 의료 시설로 환자 정보 전달이 가능해야 함)을 정의하였다. 그리고, 요구사항을 충족하는 프로토타입을 개발하고 사용성 평가를 수행하였다.

• 한국ITS학회:학술대회논문집
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• 한국ITS학회 2008년도 제7회 추계학술대회 및 정기총회
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• pp.78-84
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• 2008

• 한국ITS학회:학술대회논문집
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• 한국ITS학회 2010년도 춘계학술대회
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• pp.26-32
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• 2010

• 한국ITS학회:학술대회논문집
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• 한국ITS학회 2007년도 제6회 추계학술대회 및 정기총회
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• pp.182-185
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• 2007

• 제어로봇시스템학회논문지
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• 제17권2호
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• pp.176-182
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• 2011

Industrial network, often referred to as fieldbus, becomes an indispensable component for intelligent manufacturing systems. Thus, in order to satisfy the real-time requirements of field devices such as sensors, actuators, and controllers, numerous fieldbus protocols have been developed. But, the application of fieldbus has been limited due to the high cost of hardware and the difficulty in interfacing with multi-vendor products. As an alternative to fieldbus, the Ethernet (IEEE 802.3) technology is being adapted to the industrial environment. However, the crucial technical obstacle of Ethernet is its non-deterministic behavior that cannot satisfy the real-time requirements. Recently, the EtherCAT protocol becomes a very promising alternative for real-time industrial application due to the elimination of uncertainties in Ethernet. This paper focuses on the implementation of the IEC 61800 based real-time EtherCAT network for multi-axis smart driver. To demonstrate the feasibility of the implemented EtherCAT slave module, its synchronization performance is evaluated on the experimental EtherCAT testbed with a single axis smart driver.

• Smart Structures and Systems
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• 제13권4호
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• pp.567-585
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• 2014

The piezoelectric transverse $d_{15}$ shear sensing mechanism is firstly assessed experimentally for a cantilever smart sandwich plate made of a piezoceramic axially poled patched core and glass fiber reinforced polymer composite faces. Different electrical connections are tested for the assessment of the sensor performance under a varying amplitude harmonic (at 24 Hz) force. Also, the dynamic response of the smart sandwich composite structure is monitored using different acquisition devices. The obtained experimentally sensed voltages are compared to those resulting from the benchmark three-dimensional piezoelectric coupled finite element simulations using a commercial code where realistic features, like equipotential conditions on the patches' electrodes and mechanical updating of the clamp, are considered. Numerically, it is found that the stiffness of the clamp, which is much softer than the ideal one, has an enormous influence on the sensed voltage of its adjacent patch; therefore, sensing with the patch on the free side would be more advantageous for a cantilever configuration. Apart from confirming the latter result, the plate benchmark experimental assessment showed that the parallel connection of its two oppositely poled patches has a moderate performance but better than the clamp side patch acting as an individual sensor.