• 디지털산업정보학회논문지
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• 제16권2호
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• pp.45-52
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• 2020

This paper is focused on the modulation scheme detection of the IEEE 802.11 standard. In the IEEE 802.11ac standard, the information of the modulation scheme is indicated by the modulation coding scheme (MCS) included in the VHT-SIG-A of the preamble field. Transmitting end determines the MCS index suitable for the low signal to noise ratio (SNR) situation and transmits the data accordingly. Since data field decoding can take place only when the receiving end acquires the MCS index information of the frame. Therefore, accurate MCS detection must be guaranteed before data field decoding. However, since the MCS index information is the information obtained through preamble field decoding, the detection rate can be affected significantly in a low SNR situation. In this paper, we propose a relatively robust modulation classification method based on deep learning to solve the low detection rate problem with a conventional method caused by a low SNR.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2005년도 춘계학술대회논문집
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• pp.235-239
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• 2005

This paper gives a field-test method and result of PQM(Power Quality Meter) and PQMS(Power Quality Management System). The field-test was carried out as our own method. So, the test method has several kinds of improvement in this paper because it is first time to try the field-test of the equipment. However, we expect that the test result of PQM & PQMS has been used as a reference data which makes a scheme of evaluating performance of the equipment that has been used or is developed.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2013년 춘계학술대회
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• pp.471-484
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• 2013

Large and complicated firefighting environment is accelerating in the early activities in the field of fire officials at the time limit situation leads to people's lives and property damage, as well as the loss of the Fire Service. Therefore, the state-of-the-art technology that can respond to rapidly changing fire environment urgently in the field of fire fighting have been introduced should be utilized. These intelligent firefighting robots build daegukmin firefighting safety net that can be used when. Other advanced technology industries, the most effective ways that can be introduced into the firefighting shall be provided in the current situation of the industry's initial firefighting robots.

• 디지털산업정보학회논문지
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• 제5권4호
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• pp.117-126
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• 2009

The recent interest in sensor networks has led to a number of routing schemes that use the limited resources available at sensor nodes more efficiently. These schemes typically try to find the minimum energy path to optimize energy usage at a node. Some schemes, however, are prone to unbalance of the traffic and energy. To solve this problem, we propose a novel solution: a gradient-field approach which takes account of the minimum cost data delivery, energy consumption balancing, and traffic equalization. We also modify the backoff-based cost field setup algorithm to establish our gradient-field based sensor network and give the algorithm. Simulation results show that the overhead of routing establishment obtained by our algorithm is much less than the one obtained by Flooding. What's more, our approach guarantees the basic Quality of Service (QoS) without extra spending.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2009년도 세계 도시지반공학 심포지엄
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• pp.1289-1293
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• 2009

For the purpose of automatic management and enhancing quality of construction, information technology has been employed in construction field recently. As a consequence, informative construction, which utilizes information technology to reduce construction time and optimize construction sequence, becomes a state-of-art field of construction. Considering this case, construction field should more actively adopt other engineering technologies of rapidly advancing fields, such as electronic, control, and informative engineering, in order to reduce construction cost and to solve environmental problems as well as to enhance construction quality. In this aspect, this paper introduces a novel research field 'Geo-mechatronics', which stands for the convergence of geotechnical engineering and mechatronics (i.e. automation of mechanics using electronic technologies). Since the ground is ubiquitous in every infrastructure construction, the Geo-mechatronics research is crucial for the development of construction technology in the future. Moreover, it is believed to that the Geo-mechatronics research will make our construction industry to be more future-oriented and internationally comparative industry.

• 경영과정보연구
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• 제14권
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• pp.51-65
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• 2004

We consider the Fuzzy clustering which is devised for partitioning a set of objects into a certain number of groups by assigning the membership probabilities to each object. The researches carried out in this field before show that the Fuzzy clustering concept is involved so much that for a certain set of data, the main purpose of the clustering cannot be attained as desired. Thus we Propose a new objective function, named as Fuzzy-Entroppy Function in order to satisfy the main motivation of the clustering which is classifying the data clearly. Also we suggest Mean Field Annealing Algorithm as an optimization algorithm rather than the ISODATA used traditionally in this field since the objective function is changed. We show the Mean Field Annealing Algorithm works pretty well not only for the new objective function but also for the classical Fuzzy objective function by indicating that the local minimum problem resulted from the ISODATA can be improved.

• 정보관리연구
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• 제27권3호
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• pp.1-24
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• 1996

전기공학 분야의 하부영역인 조명분야에 종사하는 산업체들이 필요로 하는 기술정보의 소스를 규명하였다. 에너지 절약의 일환으로 전체 전력소모의 약 18%를 점유하는 조명전력분야에 관한 기술정보를 체계화함으로써 절전형 조명기구의 생산에 도움이 될 수 있는 외국의 다양한 조명관련 기관과 그들이 생산하는 기술정보를 체계적으로 조사하여 일선 정보관리 담당자들에게 실질적인 관련정보를 제공하는데 도움이 되도록 하였다.

• 디지털산업정보학회논문지
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• 제20권1호
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• pp.31-45
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• 2024

The purpose of this study is to explain employment factors in the software field. For it, the Graduates Occupational Mobility Survey by the Korea employment information service is used. This paper proposes employment models in the software field using machine learning. Then, it explains employment factors of the models using explainable artificial intelligence. The models focus on both university graduates and vocational college graduates. Our works explain and interpret both black box model and glass box model. The SHAP and EBM explanation are used to interpret black box model and glass box model, respectively. The results describes that positive employment impact factors are major, vocational education and training, employment preparation setting semester, and intern experience in the employment models. This study provides a job preparation guide to universitiy and vocational college students that want to work in software field.

• 한국건설관리학회논문집
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• 제6권1호
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• pp.140-150
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• 2005

최근 공동주택의 마감자재가 고급화, 다양화되면서 품질만족에 대한 고객의 욕구가 과거 그 어느 때 보다도 증대되고 있으며 건설업체 또한 자사의 신인도 및 브랜드 가치의 상승을 위해 정밀시공을 통한 품질확보에 많은 노력을 기울이고 있다. 그러나 국내 공동주택 현장의 품질점검 및 하자관리는 현장관리 인원의 부족, 과다한 문서 발생, 업무 절차의 복잡성 및 관련주체간의 비효율적인 의사소통으로 품질점검에 따른 시설물의 이력관리 및 하자관리가 신속히 이루어지지 못하고 있는 실정이다. 따라서 본 연구의 목적은 이러한 품질점검 및 하자관리의 문제점을 해결하고자 PDA 및 웹을 활용하여 공동주택의 품질점검 및 하자관리에 대한 정보를 실시간으로 수집하고 이를 통해 관련 주체간의 효율적인 업무처리와 세대별 이력관리를 지원할 수 있도록 하는 공동주택 품질점검 및 하자관리 시스템을 구현하는 것이다. 본 연구에서 제시된 품질점검 및 하자 관리 시스템의 활용은 기존의 수작업에 의한 업무 절차를 간소화하고 관련 조직간의 원활한 의사소통과 시설물의 하자 관련 이력 데이터를 구축케 함으로써 품질관리 관련 업무의 질적 향상을 도모하고 궁극적으로는 품질 향상을 통한 건설업체의 고객 만족도 및 신인도 제고에도 크게 기여할 수 있을 것으로 기대된다.

• International journal of advanced smart convergence
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• 제9권3호
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• pp.1-8
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• 2020

Water consumption has grown at more than 2.5 times, comparing the past century. About 2.8 billion people live in river basins with some form of water deficit, because more than 75 % of the river flows are withdrawn for agriculture and other needs. Challenges faced by more and more countries in their struggle for economic and social development are increasingly related to water. This paper proposes a test of an effective local river field environment management solution. And describing a part of a pilot project for the ministry of water resources of Uzbekistan. Current work focused on direct action items of the existing project and describe an IoT routing based solution for local river field environment management solutions. Suggested technological decisions provided by needs and on-site testing results. The paper describes the backbone of IoT routing based river water resources management system.