• Journal of Korean Society on Water Environment
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• 제27권5호
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• pp.699-709
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• 2011

The uses of multi-dimensional hydrodynamic and water quality models are increasing to support a sustainable management of large dam reservoirs in Korea. Any modeling study requires selection of a proper spatial dimension of the model based on the characteristics of spatial variability of concerned simulation variables. For example, a laterally averaged two-dimensional (2D) model, which has been widely used in many large dam reservoirs in Korea, assumes that the lateral variations of hydrodynamic and water quality variables are negligible. However, there has been limited studies to give a justification of the assumption. The objectives of this study were to present the characteristics of spatial variations of water quality variables through intensive field monitoring in Daechung Reservoir, and provide information on a proper spatial dimension for different water quality parameters. The monitoring results showed that the lateral variations of water temperature are marginal, but those of DO, pH, and conductivity could be significant depending on the hydrological conditions and local algal biomass. In particular, the phytoplankton (Chl-a) and nutrient concentrations showed a significant lateral variation at R2 (Daejeongri) during low flow periods in 2008 possibly because of slow lateral mixing of tributary inflow from So-oak Stream and wind driven patchiness.

• Journal of Korea Entertainment Industry Association
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• 제15권3호
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• pp.279-287
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• 2021

The purpose of this study is to analyze the changes of the cognitive function and health-related quality of life. Study subjects were 35 elderly living alone and they participated in the cognitive program for 8 weeks regularly. The assessment of cognitive function was used by the Loewenstein occupational therapy cognitive assessment battery and the orientation, visual attention, spatial perception, motor praxis, visuomotor organization, thinking operation, and attention. The assessment of health-related quality of life was used by the Short form-8 health survey and the gerneral health condition, physical function and role, pain, vitality, social function, mental health, and emotional role. As the results, all the results of variables showed the statistically significant increase after the participation in the cognitive program. To improve the cognitive function and health quality of life of the elderly living alone, the participation in the cognitive program should be considered.

• Journal of the Korean Society for Library and Information Science
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• 제56권4호
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• pp.335-356
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• 2022

Universities contribute to the development of the country and society by cultivating professional manpower with knowledge and qualifications as democratic citizens through education and research activities. To this end, the government is improving the basic capabilities of universities and supporting autonomous innovation through university financial support projects. Since the financial support project differentially supports the government's finances limited to universities with a comparative advantage through fair evaluation, the role and function of the university library, a basic educational facility and core institution that supports education and research, is important. However, university libraries have not been able to actively participate in the government's financial support projects due to financial and manpower shortages, poor environments such as facilities, facilities, and spaces, and low participation rates for students. Therefore, this study investigated and analyzed the program operation cases of 18 university libraries in which libraries participated among 45 universities selected for the ACE project (2010-2016), derived problems and implications, and questioned the roles and achievements of university libraries. Based on the results, strategies and measures to be considered by university libraries in preparation for the government's university financial support projects were proposed.

• Journal of the Korean BIBLIA Society for library and Information Science
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• 제33권3호
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• pp.205-237
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• 2022

Such future-oriented institutions that put together the functions of a library, archive, and museum are being actively introduced overseas recently and are called LAM, GLAM, and media tech. In South Korea, the term larchiveum, combining library, archive, and museum, is widely used. Therefore, this study explores a case study followed to determine larchiveums in service both home and abroad. The researcher then conducted an interview with librarians, archivists, and curators working for the larchiveums selected as the South Korean cases for the study to understand the meaning of a larchiveum. Additional interviews were conducted with five users that visited a larchiveum in the nation and uploaded posts on a social media platform to understand their perceptions of a larchiveum and problems with the purpose, functions, and services of it. Based on the analysis results, the study proposes vitalization plans for the management of a larchiveum in three aspects: improving the internal and external awareness, securing budgets and manpower for space enhancement and service, and reinforcing the integrated management of a larchiveum via a devoted organization.

• Journal of the Economic Geographical Society of Korea
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• 제26권1호
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• pp.40-54
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• 2023

The purpose of this study is to present implications using local government data, focusing on the occurrence of empty houses, one of the serious social problems emerging due to population extinction and aging. The subjects of the study were Mokpo-si, which has the highest percentage of empty houses in the country, and the spatial distribution status was identified by schematizing the status of empty houses by grade on a map through data from the local government's survey on empty houses. As a result of the survey on vacant houses, it was confirmed that 90% of empty houses in Mokpo City were included in the project district of the urban regeneration strategy plan underway in Mokpo City. Currently, the empty house maintenance project is difficult to proceed smoothly due to difficulties in purchasing empty houses and lack of budget for local governments, so in order for the project to proceed quickly, it is necessary to come up with a plan to promote the project in connection with the urban regeneration strategy plan in Mokpo.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 한국정보통신학회 2021년도 춘계학술대회
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• pp.210-212
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• 2021

In modern society, various digital equipment are being distributed due to the influence of the 4th industrial revolution, and they are used in a wide range of fields such as automated processes, intelligent CCTV, medical industry, robots, and drones. Accordingly, the importance of the preprocessing process in a system operating based on an image is increasing, and an algorithm for effectively reconstructing an image is drawing attention. In this paper, we propose a filter algorithm based on a combined weight value to reconstruct an image in a complex noise environment. The proposed algorithm calculates the weight according to the spatial distance and the weight according to the difference between the pixel values for the input image and the pixel values inside the filtering mask, respectively. The final output was filtered by applying the join weights calculated based on the two weights to the mask. In order to verify the performance of the proposed algorithm, we simulated it by comparing it with the existing filter algorithm.

• The Journal of Sustainable Design and Educational Environment Research
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• 제22권3호
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• pp.1-13
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• 2023

This study aims to analyze related laws and institutions and identify research trends and the policy implementation status of the multifunctionalization of school facilities. Beginning in 2001 at Seoul Geumho Elementary School, the enactment of the "Act On The Establishment, Operation And Management Of Multifunction School Facilities" in 2020, was elucidated through the concept and spectrum of the multifunctionalization of school facilities. The relevant research mainly focuses on elementary schools, elderly facilities, and space planning. The Living SOC Project in 2019 acted as a trigger in promoting the multifunctionalization of school facilities as a central government policy. In 2023, the Ministry of Education announced measures and guidelines for establishing the multifunctionalization of school facilities by conducting the project with respect to the "Nulbum School" policy.

• Journal of the Korea Institute of Information Security & Cryptology
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• 제34권2호
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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.

• Journal of Industrial Convergence
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• 제22권3호
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• pp.13-25
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• 2024

This study explores research topics related to dance performances published in Korea based on big data and examines research trends that change according to the trend of the times. The results derived from topic modeling analysis are as follows. (1) Six major topics were derived: a study on marketing strategies and development plans for dance performances, (2) a study on the re-watching factors of dance performance space and performance satisfaction, (3) a study on the popularity and contribution of dance performances in the stage environment, (4) a study on the current status of dance performances and the convergence of dance group operations, (5) a study on the definition of dance performances using various social media, and (6) a study on the direction and development of technology-applied dance performance contents. Accordingly, research trends and topics related to dance, including dance performances, social changes, key keywords of researchers' change interests were extracted, and keywords were compared and analyzed to present academic changes and countermeasures. Accordingly, the need for research to apply new technologies was emphasized as it diversified and fused.

• The Korean Journal of Air & Space Law and Policy
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• 제28권2호
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• pp.259-294
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• 2013

After its experiment involving the exploding of a satellite in space in 2007, China proudly aired news on TV and ran articles in newspapers. However, the event was internationally criticized and drew widespread attention. Many countries denounced the explosion by pointing out that it could be part of the nation's plan to expand its military power to space or that it could pose a danger to the peaceful use of space. However, there is no talk of whether the experiment that produced a huge amount of space debris could have violated an international law, namely the Outer Space Treaty. Although space garbage has been said to be a serious problem, the amount is still on the increase. If we continue to launch new space launch vehicles into orbit at this rate, we will not be able to use it anytime soon like we do today. As the commercial use of space is likely to increase, the situation will certainly get worse. The international community is fully aware of the seriousness of the problem and working together to reduce the amount of space garbage. However, despite the fact that the United States and Soviet Union's ASAT(Anti-Satellite) programs have been implemented for a long time, there have been no complaints about them in terms of military expansion or breach of the Outer Space Treaty. Also, the recent Chinese test is largely viewed to be in accordance with international law. A lot of research has been undertaken with regard to the problem of space garbage. Now people's awareness of dangers being posed has been fully raised. Under the circumstances, the dismissing of China's satellite smashing, leaving a big mess in its wake, as nothing more than an experiment, is a red flag to, if not many, at least some people. By means of this thesis, I would like to review whether the Chinese test has violated an international space law. This thesis presents an overview of the issues surrounding the event and examines the possibility of violating the Outer Space Treaty, formally the Treaty on Principle Governing the Activities of States in the Exploration and Use of Outer Space, Including the Moon and Other Celestial Bodies. After the China test, the UN Scientific and Technical Subcommittee first adopted space debris mitigation guidelines, I'll introduce the content of the guidelines and discuss the characteristics of the guidelines and what can be done to address the issue.