• 융합정보논문지
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• 제11권11호
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• pp.10-16
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• 2021

스마트공장의 구현이 널리 확산되면서 IoT장비를 이용한 방대한 양의 빅 데이터를 관련성과 품질 측면에서 우선순위를 지정하여 데이터 효율성을 향상시킬 수 있는 연구 필요성이 제기된다. 원가변동성 추정, 레시피 최적화 등의 관리회계 의사결정에 있어서 빅 데이터의 우선순위를 지정하는 것이 스마트솔루션 성과와 의사결정 효과를 향상시킬 수 있는지를 규명함이 본 연구의 목적이다. 제조데이터를 실시간으로 연계한 ERP, MES 등의 스마트솔루션을 운영하는 국내 중소제조업체 의사결정자 84명의 설문답변을 토대로 경험적 연구 수행 결과, 빅데이터우선순위 설정은 관리회계 의사결정에 긍정적인 영향을 미치는 것으로 분석되었다. 아울러 빅 데이터 우선 순위 지정은 관리회계 의사결정에서 빅 데이터를 사용함으로써 스마트솔루션 성과에 간접적인 영향을 미치는 매개 효과가 있음을 발견하였다. 연구결과를 통하여 경영의사결정과정에서 빅 데이터 간의 연관성을 평가하는 척도를 개발함에 선행연구로서의 기여를 할 수 있을 것이다.

• 센서학회지
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• 제27권3호
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• pp.186-191
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• 2018

Smart textile industries have been precipitously developed and extended to electronic textiles and wearable devices in recent years. In particular, owing to an increasingly aging society, the elderly healthcare field has been highlighted in the smart device industries, and pressure sensors can be utilized in various elderly healthcare products such as flooring, mattress, and vital-sign measuring devices. Furthermore, elderly healthcare products need to be more lightweight and flexible. To fulfill those needs, textile-based pressure sensors is considered to be an attractive solution. In this research, to apply a textile to the second layer using a pressure sensing device, a novel type of conductive textile was fabricated using vapor phase polymerization of poly(3,4-ethylenedioxythiophene) (PEDOT). Vapor phase polymerization is suitable for preparing the conductive textile because the reaction can be controlled simply under various conditions and does not need high-temperature processing. The morphology of the obtained PEDOT-conductive textile was observed through the Field Emission Scanning Electron Microscope (FESEM). Moreover, the resistance was measured using an ohmmeter and was confirmed to be adjustable to various resistance ranges depending on the concentration of the oxidant solution and polymerization conditions. A 3-layer 81-point multi-pressure sensor was fabricated using the PEDOT-conductive textile prepared herein. A 3D-viewer program was developed to evaluate the sensitivity and multi-pressure recognition of the textile-based multi-pressure sensor. Finally, we confirmed the possibility that PEDOT-conductive textiles could be utilized by pressure sensors.

• 대한전자공학회논문지TC
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• 제48권4호
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• pp.53-60
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• 2011

OFDM(Orthogonal Frequency Division Multiplexing) 시스템의 Rayleigh fading 에 대한 내구성을 증대시키기 위하여 채용되는 2 종류의 스마트안테나 즉 귀납적인 고유공간법에 기반한 FFT(Fast Fourier Transform) 전단 스마트안테나와 Wiener 해법에 기반한 FFT 후단 스마트안테나의 가중치벡터 갱신의 수학적 모델을 정의한 후 컴퓨터 모의실험에 의거, 그 성능들을 비교 분석하였다. 장치의 복잡성의 대가로 FFT 후단 스마트안테나의 성능이 훨씬 우수함이 보여졌고 특히 다중경로의 시간지연이 OFDM 가드타임을 벗어날 경우와 강한 동일채널 간섭신호가 존재할 경우의 FFT 후단 스마트안테나 성능의 우월성이 입증되었다. FFT 후단 스마트안테나의 복잡성을 줄이기 위하여 제안된 부채널 군집형 가중치벡터 갱신 안테나와 부채널 전력 기반의 MRC(Maximum Ratio Combining) 다이버시티 안테나 기법의 성능이 전형적인 Wiener 해법에 기반한 FFT 후단 스마트안테나와 비교되었다.

• Journal of Smart Tourism
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• 제2권2호
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• pp.21-32
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• 2022

This paper shows light on the concept of smart tourism destination as a future of tourism development, especially in the context of problems associated with developing countries. This study substantiates the case of smart tourism development in mountain destinations as an affordable and needed future of the contemporary era. This conceptual study is based on secondary literature on Smart Cities, Smart Tourism Destinations, and Tourism in Himachal Pradesh. The Indian state of Himachal Pradesh has been considered as a study area to acknowledge major tourism-related challenges, especially in mountain locations. Consequently, the dots are connected between existing challenges and solutions that smart tourism holds. It turns out that for the development of mountain tourism destinations such as Himachal Pradesh in the Indian Himalayas, investments in smart infrastructure are required. By developing smart infrastructure, a new USP can be made, a supportive environment for new local businesses, new employment opportunities, enhanced tourist experience and an overall raised standard of living for locals. Considering all factors, it leads to a highly competitive tourism destination. All tourism destinations located in the Himalayan mountains show somewhat the same tourism challenges as Himachal Pradesh, India. Therefore, this paper brightens the path of destination planners towards the development agenda of smart tourism destinations and shows how smart tourism infrastructure can be deployed for better management of tourism destinations.

• Steel and Composite Structures
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• 제23권3호
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• pp.339-350
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• 2017

In this paper, various nonlocal higher-order shear deformation beam theories that consider the size dependent effects in Functionally Graded Material (FGM) beam are examined. The presented theories fulfill the zero traction boundary conditions on the top and bottom surface of the beam and a shear correction factor is not required. Hamilton's principle is used to derive equation of motion as well as related boundary condition. The Navier solution is applied to solve the simply supported boundary conditions and exact formulas are proposed for the bending and static buckling. A parametric study is also included to investigate the effect of gradient index, length scale parameter and length-to-thickness ratio (aspect ratio) on the bending and the static buckling characteristics of FG nanobeams.

• Journal of Multimedia Information System
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• 제5권4호
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• pp.229-234
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• 2018

This paper focuses on the frozen storage warehouse located in Busan area, and it is because Busan is the most dense area in Korea. Busan is a port city, and almost all of the frozen refrigerated cargo imported from abroad is concentrated. By taking advantage of its strength as a fishery industry as well as importing, Busan is building the largest international fishery logistics base in Northeast Asia and plays an important role in the export of refrigerated cargo is. Therefore, although the freezing and chilling facilities seem to be developed with the latest technology, the reality is not so. Most of them are functioning as a warehouse, that is, a storage function, and a considerable number of refrigerated warehouses are in a state of aging. Therefore, in this paper, the facility and function restructuring of the freezing storage warehouse have been set as a solution task, and the introduction of the cold chain system containing the latest smart technology has been proposed as a solution.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.886-892
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• 2022

In construction projects, it is common to exchange documents using email because of convenience. In this study, a method extracting and organizing block information automatically based on email was developed. This method is composed of document exchange and archiving processes, which are difficult to manage and vulnerable to loss. Therefore, this study aims to develop a solution that can automatically link email and block information. The block data components are designed to derive from email exchange and user-additional input information. Also, automatically generating blocks process including extraction and conversion of information was proposed. This solution can lead to promote the convenience of project document management in terms of identifying the document flow and preventing loss of information.

• 디지털융복합연구
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• 제9권3호
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• pp.181-190
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• 2011

스마트러닝(Smart Learning)이 교육계 및 산업계에 급속하게 확산되고 있다. 그 중에서도 주목해야 할 영역은 대학의 스마트러닝과 스마트캠퍼스이다. 그것은 대학이 고등교육 분야중 가장 상위의 위치를 차지하고 있고, 최근에는 평생교육을 위한 핵심 역할도 수행하고 있어 파급효과가 가장 크기 때문이다. 그러나 실질적인 교육 효과 증대로 이어지기 위한 스마트형 교육모델의 도입 및 실현은 요원하다. 이에 본 연구에서는 대한의 스마트러닝 도입을 위한 구현 요인에 대해 탐색하고, 교육 패러다임의 변화를 이끌 수 있는 스마트 캠퍼스 구현 모델을 제시하고자 한다.

• 한국멀티미디어학회논문지
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• 제10권12호
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• pp.1655-1662
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• 2007

Although the PKl-based user authentication solution has been widely used, the security of it can be deteriorated by a simple password. This is because a long and random private key may be protected by a short and easy-to-remember password. To handle this problem, many biometric-based user authentication solutions have been proposed. However, protecting biometric data is another research issue because the compromise of the biometric data will be permanent. In this paper, we present an implementation to improve the security of the typical PKI-based authentication by protecting the private key with a fingerprint. Compared to the unilateral authentication provided by the typical biometric-based authentication, the proposed solution can provide the mutual authentication. In addition to the increased security, this solution can alleviate the privacy issue of the fingerprint data by conglomerating the fingerprint data with the private key and storing the conglomerated data in a user-carry device such as a smart card. With a 32-bit ARM7-based smart card and a Pentium 4 PC, the proposed fingerprint-based PKI authentication can be executed within 1.3second.

• ETRI Journal
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• 제28권3호
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• pp.320-328
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• 2006

Using biometrics to verify a person's identity has several advantages over the present practice of personal identification numbers (PINs) and passwords. To gain maximum security in a verification system using biometrics, the computation of the verification as well as the storing of the biometric pattern has to take place in a smart card. However, there is an open issue of integrating biometrics into a smart card because of its limited resources (processing power and memory space). In this paper, we propose a speaker verification algorithm using a support vector machine (SVM) with a very few features, and implemented it on a 32-bit smart card. The proposed algorithm can reduce the required memory space by a factor of more than 100 and can be executed in real-time. Also, we propose a hardware design for the algorithm on a field-programmable gate array (FPGA)-based platform. Based on the experimental results, our SVM solution can provide superior performance over typical speaker verification solutions. Furthermore, our FPGA-based solution can achieve a speed-up of 50 times over a software-based solution.