• Journal of the Korea Institute of Information and Communication Engineering
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• v.23 no.10
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• pp.1275-1281
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• 2019

The automatic modulation recognition of a radio signal is a major task of an intelligent receiver, with various civilian and military applications. In this paper, we propose a method to recognize the modulation of radio signals in wireless communication based on the deep neural network. We classify the modulation pattern of radio signal by using the LSTM model, which can catch the long-term pattern for the sequential data as the input data of the deep neural network. The amplitude and phase of the modulated signal, the in-phase carrier, and the quadrature-phase carrier are used as input data in the LSTM model. In order to verify the performance of the proposed learning method, we use a large dataset for training and test, including the ten types of modulation signal under various signal-to-noise ratios.

• Journal of Internet of Things and Convergence
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• v.7 no.2
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• pp.1-6
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• 2021

In recent years, many people are living in a space limited by rapid global industrial development and economic growth, and rapid urbanization is underway, with the global urban population estimated to be more than 70 percent in 2050. Due to rapid urbanization, government-led smart city models are being developed and introduced to solve various urban problems such as disaster safety, air pollution, water pollution, energy shortage, disease, crime and transportation. However, since ICT technology of public housing is being developed as a type of social overhead capital project, it is necessary to develop micro-smart city projects that residents can feel by developing services such as public safety, living environment, living welfare, and energy management for public housing residents. Therefore, in this paper, the smart platform model of public housing for smart city in the era of the Fourth Industrial Revolution is planned and presented.

• Information Systems Review
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• v.8 no.1
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• pp.265-285
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• 2006

The purpose of this research is to identify the major evaluation criteria of IT investment projects and establish the importance weights of criteria through AHP analysis. Seven evaluation criteria which have been drawn from prior studies and industry practices are direct costs, indirect costs, financial benefits, strategic value, risk, technical necessity, and political considerations. Data have been collected from 95 IT projects in 40 public organizations and private firms in Korea. After having applied the data reliability test, 79 projects have been selected. The results of AHP analysis show the importance weights and priorities of seven evaluation criteria as follows: financial benefits 25.2%, strategic value 22.36%, direct costs 14.34%, risk 12.10%, technical necessity 11.55%, political considerations 8.3%, and indirect costs 6.48%. And the weights of seven criteria shows considerable differences among three different IT project types such as transactional, informational, and infrastructural.

• Journal of Internet Computing and Services
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• v.23 no.6
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• pp.59-69
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• 2022

For effective battlefield situation awareness and command resolution, information exchange without seams between systems is essential. However, since each system was developed independently for its own purposes, it is necessary to ensure interoperability between systems in order to effectively exchange information. In the case of our military, semantic interoperability is guaranteed by utilizing the common message format for data exchange. However, simply standardizing the data exchange format cannot sufficiently guarantee interoperability between systems. Currently, the U.S. and NATO are developing and utilizing information exchange models to achieve semantic interoperability further than guaranteeing a data exchange format. The information exchange models are the common vocabulary or reference model,which are used to ensure the exchange of information between systems at the content-meaning level. The information exchange models developed and utilized in the United States initially focused on exchanging information directly related to the battlefield situation, but it has developed into the universal form that can be used by whole government departments and related organizations. On the other hand, NATO focused on strictly expressing the concepts necessary to carry out joint military operations among the countries, and the scope of the models was also limited to the concepts related to command and control. In this paper, the background, purpose, and characteristics of the information exchange models developed and used in the United States and NATO were identified, and comparative analysis was performed. Through this, we intend to present implications when developing a Korean information exchange model in the future.

• Land and Housing Review
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• v.2 no.4
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• pp.453-461
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• 2011

This study is to derive a project model based on potential demand for Korean-style houses, focusing on new town detached housing sites that LH supplies and to test validity of the derived model and to present the direction and supply methods of the projects. The existing high-class new town Korean-style housing developments that have been considered were found to have little business value due to problems in choice of location and discordance of demand, so 6 types of projects were established through the methods of changes in planned scale, combined use, and subdivision of plot of land based on the results of survey. The type that has the highest business value among the project models was block-type multifamily houses, and this can be interpreted as the increase in total construction area leading to increase inrevenues of allotment sales due to economies of scale. The feasibility of mass housing model in which small-scale Korean-style houses are combined with amenities was found to be high, and if the same project conditions as those of the block-type multifamily houses are applied, the business value of the Korean-style tenement houses was found to be high. Besides, the high-class housing models within block-type detached housing areas are typical projects that the private sector generally promotes, and the construction cost was found to be most expensive with 910 million won per house. In order to enhance the business value of the Korean-style housing development, collectivization such as choice of location, diversification of demand classes, optimization of house sizes, and combination of uses is needed. And in order to adopt Korean-style houses in the detached housing sites, the adjustments and division of the existing planned plots are needed, and the strategies to cope with new demand through supplying Korean-style housing types of sites can be suggested. Also breaking away from the existing uniform residential development methods, the development method through supplying original land that is natural land not yet developed besides basic infrastructures (main roads and water and sewage) can be considered, and as the construction of more than 1~2 stories building is impossible due to the structure of Korean-style house roof and furniture. So it can be suggested that original land in the form of hilly land is considered to be most suitable to large-scale development projects.

• Journal of Digital Convergence
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• v.16 no.6
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• pp.449-462
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• 2018

The purpose of this study is to develop a competency-based convergence curriculum for the development of sports marketers, sports talent in the sports industry. For this purpose, we conducted literature analysis, in-depth interviews and job analysis to derive necessary capabilities to become sports marketers, draw up a capability profile, and then developed a capability model through expert verification. Sports marketers ' capacity models were divided into sport marketing / PR and sports events by type of experience, with six common basic competencies including sports mind and 12 professional competencies including sponsorships. Sports marketers education courses developed based on capacity models are composed of understanding of sports industry, sports marketing communication, sports law, understanding of sports facility, sports facilities management, sports sponsorship, sports media, sports licensing, sports agent, sports event planning, sports event management, make a proposal, sports event field practice. The developed training courses for sports marketers will be used in colleges and private education institutions related to the sports industry, contributing to fostering and expanding sports industry talent.

• Land and Housing Review
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• v.7 no.2
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• pp.103-111
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• 2016

The paradigm of the housing policy has been transformed from housing supply to housing welfare, from the policy of housing quantity expansion to the policy of customized housing welfare. The Housing Act was newly enacted to realize the new paradigm of the housing policy. The Act establishes the role of the Housing Welfare Centers in the housing welfare delivery system, but they have some difficulties in doing their role because of limited amount of centers and their manpower. The desirable and efficient model of housing welfare delivery system, therefore, is that the demand of housing welfare is discovered on local base, and that demanders can be provided housing welfare service connected to local governments or neighborhood housing welfare centers. To do so local communities should be established and activated, and the needs of housing welfare service also be discovered. This study is a exploratory one on communities' role in housing welfare delivery system in spite of some limitations based on existing theories and studies, and is significant as a new trial.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2010.10a
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• pp.21-21
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• 2010

우리나라는 원조를 받는 수원국에서 원조를 주는 공여국로 성장한 최초의 국가이며, 경제력 신장에 따라 국제사회에서의 국가 위상 역시 크게 높아 졌다. 한국에 대한 국제사회의 기여요구가 증가함에 따라, 우리나라는 2009년 경제협력개발기구(OECD) 개발원조위원회(DAC)에 가입하여 국제사회에서의 영향력을 확대하고 있다. 한국의 국제개발원조는 한국국제협력단(KOICA)을 통해 대부분 이루어지고 있으나, 그 범위가 넓어 실질적으로 농업부분의 원조는 2009년의 경우 250억 내외로 전체 지원금의 6.8-8.8% 미비한 실정이다. 따라서 농림수산식품부는 농업부문에 특성화된 국제협력사업을 추진함으로써, 첫째, 수혜국의 농업 농촌개발과 농가소득 증대에 따른 빈곤문제 해결은 물론, 둘째, 아국의 해외농업개발 및 해외농업자원 개발에 힘쓰고 있다. 이러한 기본방향은 우리정부가 해외농업개발 및 농업자원 확보의 중요성을 인식하여, 적극적인 민간참여하에 기업, 대학, 연구소 등의 컨소심엄 구성에 의한 사업추진을 유도함으로써 지원국과 수혜국 등 양국 모두의 이익을 추구하는데 목적이 있다. 따라서 동국대학교 ODA사업은 아시아 중점 협력국인 베트남의 달랏 (Dalat)지역을 대상으로 농업시설 및 기술지원 사업을 수행하고 있다. 베트남은 외국과의 경제협력에 노력을 기울이고 있으나, 현재까지 도 농간 심각한 경제적 불균형과 농촌빈곤 문제를 해결하지 못하고 있다. 그러나 베트남 달랏은 농업 환경여건이 원예 특용작물 생산에 적합한 지역이므로, 고부가가치 농산업의 특성화를 통한 베트남 농업 개선사업의 모델을 제시할 수 있는 적지이다. 본 사업은 베트남의 특성화된 고부가가치 작물 연구 및 생산지원, 한국 농기업과 연계한 베트남 원예 특용 농업유전자원의 지속적 확보와 이용, 국내 농산업관련기업의 해외시장 개발 등을 목표로 하고 있다. 이러한 협력과 지원으로 베트남의 경제적 기술적 발전과 경제구조의 회복을 유도하고, 도 농간의 균형발전을 통한 저개발국가의 경제발전모델을 제시할 수 있을 것으로 기대된다. 또한 한국의 해외 농업유전자원의 지속적 확보 및 이용, 대외 이미지 제고와 외교력 강화, 경제협력 강화와 국내 농산업 관련기업의 발전 및 해외 진출 확대, 국제회의 및 협상에서의 아국의 입지강화 등에 기여할 수 있을 것으로 기대된다.

• Korean Journal of Construction Engineering and Management
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• v.8 no.3
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• pp.116-124
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• 2007

It is Increasing that requirements of social infrastructure which includes educational, welfare, cultural facilities for public. Government introduced BTI(Build-Transfer-Lease) as a PFI(Private Financial Initiative) system. This research is about BTL projects in small public educational facilities. Some problems when BTL system is applied to small public educational facilities are identified, and the reason of those problems are examined. This research proposes alternatives in a institutional way and it proposes improvements in contractual structure of consortium when BTL system is applied. Based on reasonable system, it promotes creativeness and effectiveness of a project, and it makes local minor construction companies participate in BTL project without difficulties as mentioned.

• Journal of Internet Computing and Services
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• v.22 no.2
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• pp.29-39
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• 2021

As damages to individuals, private sectors, and businesses increase due to newly occurring cyber attacks, the underlying network security problem has emerged as a major problem in computer systems. Therefore, NIDS using machine learning and deep learning is being studied to improve the limitations that occur in the existing Network Intrusion Detection System. In this study, a deep learning-based NIDS model study is conducted using the Convolution Neural Network (CNN) algorithm. For the image classification-based CNN algorithm learning, a discrete algorithm for continuity variables was added in the preprocessing stage used previously, and the predicted variables were expressed in a linear relationship and converted into easy-to-interpret data. Finally, the network packet processed through the above process is mapped to a square matrix structure and converted into a pixel image. For the performance evaluation of the proposed model, NSL-KDD, a representative network packet data, was used, and accuracy, precision, recall, and f1-score were used as performance indicators. As a result of the experiment, the proposed model showed the highest performance with an accuracy of 85%, and the harmonic mean (F1-Score) of the R2L class with a small number of training samples was 71%, showing very good performance compared to other models.