• Journal of the Korean Geotechnical Society
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• v.34 no.10
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• pp.39-49
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• 2018

In this study, aimed at determining the elastic modulus of deep mixed samples, 320 test specimens were developed by mixing 8%, 10%, 12%, and 14% of stabilizer mixture in the granular conditions of clay, sand and gravel. Uniaxial compression tests were carried out using these specimens, and the uniaxial compression strength and strain were analyzed to determine the secant elastic modulus and tangent elastic modulus. Laboratory test results showed that the uniaxial compression strength of all deep mixed samples increased with increasing curing time and stabilizer mixing ratio, and that the secant elastic modulus and the tangen elastic modulus also increased. The increase of the elastic modulus according to the curing period turned out greater in the tangent elastic modulus than in the secant elastic modulus. In order to measure elastic modulus with changes in stabilizer mixing ratio, the correlation coefficient between the elastic modulus for stabilizer mixing ratio of 8% and that of 10%, 12% and 14% was calculated respectively by the specimen condition. The elastic modulus tended to increase as the grain size in a deep mixed specimen increased. The distribution of grain size that had the greatest effect appeared when the composition ratio of sand was high. On the other hand, the increase in the elastic modulus was larger in the sand specimens than in the clay and gravel specimens. Based on these results, it is suggested that a pertinent soil parameter of the deep mixed ground in the field may be obtained by the particle size distribution and the mixing ratio of stabilizer of the deep mixed soil.

• Proceedings of the Korea Contents Association Conference
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• 2011.05a
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• pp.343-344
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• 2011

신기술 정보를 모니터링하고 신규 아이템을 탐색하는 활동은 R&BD 활동 중에서 가장 중요한 활동이다. KISTI는 신기술 모니터링 및 탐색을 지원하기 위한 정보포털 '미리안'을 운영 및 서비스하고 있다. 미리안은 과학기술 전 분야에 대해 글로벌동향모니터링 정보, 최신기술에 대한 심층분석정보, 과학기술정책정보 등의 콘텐츠를 서비스하고 있다. 본 연구에서는 1) 미래유망기술발표 및 해당 기술의 서비스 탑재, 2) 정보 수요조사를 통한 서비스 기획 및 구현, 3) 개인화 맞춤형 신기술 모니터링 체제로 이어지는 미리안 서비스 체제에서 두 번째 단계에 해당하는 '신기술 정보 수요조사' 결과와 이의 서비스 적용 사례를 제공함으로써, 수요자 맞춤형 신기술 정보제공 체제 구축 사례를 제시하고자 한다. 신기술 정보 수요자의 특성을 심층분석하여 개인화 서비스 기획에 활용하기 위한 후행 연구가 추진중이며, 이를 통해 이용자 니즈를 파악하여 서비스를 선제안하는 인텔리전트 서비스가 가능할 것으로 보인다.

• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.335-335
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• 2023

본 연구에서는 국가가뭄정보통계집 내 실제 농경지 피해 사례를 바탕으로 농경지 피해영향지수라는 새로운 개념을 정의하고, 이를 산정하기 위한 방법론을 제안하였다. 먼저, 전국 15개 광역시·도를 대상으로 2018년부터 2021년까지 실제 발생한 가뭄피해 사례들을 심층 분석하고, 대상 지역 내 전체 농경지 면적 대비 농경지 피해 면적의 비율을 대표적인 농업가뭄 피해 인자로 선정하였다. 평년 대비 영농기 강수량 및 저수율을 가뭄영향인자로 고려한 후, 실제 가뭄 발생 당시 인자들 간의 직간접적인 관계를 파악하고, 그 영향 정도를 수치화하여 농경지 피해영향지수를 정의하였다. 추가로, 가뭄피해 발생시기의 농업용수 비상지원 사례에 주목하여 농업용수 비상지원 여부에 따른 가뭄인자의 조건별 농업가뭄 발생확률을 산정하고, 그 결과로부터 대상 지역별 상대위험도 및 농업가뭄 취약 정도를 비교·평가하였다. 본 연구를 통해 산정한 농경지 피해영향지수와 상대위험도는 국내 농업가뭄 취약지역을 선정하는 기준 마련에 도움을 줄 수 있고, 지역별 농업용수 지원의 효율성을 평가하는 요소로써 활용될 수 있을 것으로 기대된다.

• Journal of Life Science
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• v.21 no.2
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• pp.176-182
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• 2011

Deep seawater (DSW) generally refers to seawater at depths equal to or greater than 200 meters. DSW is rich in inorganic materials which have attracted attention for its various applications. In this study we investigated the effects of the DSW upwelled from the East Sea, offshore Yang Yang (KangWon-do, Korea), on the expression of ${\mu}$-opioid receptor (MOR) of cultured rat hippocampal neurons. Neurons were grown in a minimal essential medium containing 10% (v/v) fetal bovine serum and either 25% (v/v) distilled water, or hardness (H) 800, or H 1000 DSW. Cultures grown in the presence of DSW with H 800 and H 1000 exhibited robust MOR immunoreactive signals in both neurons and astrocytes. Interestingly, the increase in MOR immunoreactive signals was more dramatic in astrocytes than in neurons. Statistical analysis revealed that the relative intensities for MOR clusters increased approximately 4-fold in astrocytes cultured in H 800 and H 1000 media. These increases were statistically very significant (p<0.001). In contrast, the increase in intensities for MOR immunoreactive signals was relatively less dramatic in neurons, where only the increase in the H 1000 culture was statistically very significant (p<0.001). These results indicated that DSW promotes expression of MOR in both neurons and astrocytes, and more significantly in the latter.

• Journal of Environmental Impact Assessment
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• v.32 no.6
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• pp.473-487
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• 2023

Korea's multi-purpose dams, which were constructed in the 1970s and 1980s, have a single outlet located near the bottom for hydropower generation. Problems such as freezing damage to crops due to cold water discharge and an increase the foggy days have been raised downstream of some dams. In this study, we analyzed the effect of water intake depth on the reservoir's water temperature stratification structure and outflow temperature targeting Hapcheon Reservoir, where hypolimnetic withdrawal is drawn via a fixed depth outlet. Using AEM3D, a three-dimensional hydrodynamic water quality model, the vertical water temperature distribution of Hapcheon Reservoir was reproduced and the seasonal water temperature stratification structure was analyzed. Simulation periods were wet and dry year to compare and analyze changes in water temperature stratification according to hydrological conditions. In addition, by applying the intake depth change scenario, the effect of water intake depth on the thermal structure was analyzed. As a result of the simulation, it was analyzed that if the hypolimnetic withdrawal is changed to epilimnetic withdrawal, the formation location of the thermocline will decrease by 6.5 m in the wet year and 6.8 m in the dry year, resulting in a shallower water depth. Additionally, the water stability indices, Schmidt Stability Index (SSI) and Buoyancy frequency (N²), were found to increase, resulting in an increase in thermal stratification strength. Changing higher withdrawal elevations, the annual average discharge water temperature increases by 3.5℃ in the wet year and by 5.0℃ in the dry year, which reduces the influence of the downstream river. However, the volume of the low-water temperature layer and the strength of the water temperature stratification within the lake increase, so the water intake depth is a major factor in dam operation for future water quality management.

• The Journal of the Korea Contents Association
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• v.16 no.5
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• pp.720-731
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• 2016

This study aims to understand characteristics and roles of community media in Seoul to discuss the meanings of the media. Community media is constructed based upon the networks of relations of community participants, whose characteristic relations of participants within the network determines the roles and meanings of the media for the community. Research have shown that community media's unique open, participatory, and horizontal communicative structures enable to realize such objects. For this study, we chose Mapo FM to conduct case study based upon network analysis of 'participant network' of the media. In particular, we tried to measure the density and centrality of the network, which can explain the relational characteristics of the networks of the media. In addition, we also conducted in-depth interviews of participants to better understand the problems and meanings of the community media. The findings suggest that unlike the conceptual and theoretical assumptions, the community media under the study lacks of open, participatory, and horizontal ways of participation in the media.

• Journal of Convergence for Information Technology
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• v.11 no.1
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• pp.143-155
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• 2021

The purpose of this study is to adopt qualitative research methods for alpine snowboard athlete to analyze their injury factors in depth from a psychological perspective. Therefore, in-depth interviews were conducted on four outstanding Alpine Snowboard athlete, and the results were as follows. Among the factors of the injury of Alpine snowboard athlete, the psychological point of view was derived from five factors: 'Trait Anxiety', 'Personality Characteristic', 'Expectancies of Significant Others, 'Discrepancy between ability and expectation' and 'Trauma Injuries'. The five psychological injury factors have expressed the raw data of the subject in a case-oriented manner, and empirical and field-oriented interview data will enable in-depth analysis of psychological factors related to injury to future Alpine snowboard athlete and coaches. It is expected to be used as a basis for injury prevention and countermeasures. All data can be used as a basis for positive effects on the quality of life of athletes and athletes in winter sports.

• The Journal of the Korea Contents Association
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• v.19 no.10
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• pp.290-305
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• 2019

As laws regarding the execution of governmental and public corporate advertising have been enforced since 2018, the need for the increase in effectiveness and public benefits of governmental advertising has been suggested. This research focuses on the government's health campaigns regarding well-being, hygiene, and safety and thus conducts an in-depth research into strategies and the future course of policies. First, it analyzes domestic/international governmental advertising in the realm of health campaigns and specifically studies governmental advertising that employs media technologies in health communications. Furthermore, through in-depth interview with 10 health campaign experts, the study explores possible plans of utilizing the ever-developing field of digital technology. The results of this research show that it is imperative to target and strategize according to the purposes of health campaigns. It is also important to set the appropriate parameters of the campaigns according to the given budget while securing the quantity and quality of creativity. Also, it will be crucial to utilize media technology to the fullest extent and strategize around it. Therefore, this research suggests theoretical as well as practical strategic plans to increase the effectiveness and efficiency of governmental advertising in the realm of well-being, hygiene, and safety in health campaigns.

• Therapeutic Science for Rehabilitation
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• v.9 no.4
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• pp.33-43
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• 2020

Objective: This study used a mixed methods analytical approach to analyze the level of depression in and quality of life of patients who had been exposure to Agent Orange. Methods: Data on the general characteristics, depression level, and the quality of life of 29 patients who were hospitalized because of exposure to Agent Orange were collected. Focus group interviews were conducted with 17 of these 29 patients. Regarding mixed methods, the sequential integrated design model proposed by Teddlie and Tashakkori (2003) was employed. The analytical methods were as follows: (1) general characteristics were examined using frequencies and proportional distributions; (2) depression scores and quality of life scores were assessed using descriptive statistical analysis; and (3) content analysis was used to examine the focus group interview data. Results: The average K-GDS depression score was 19.24 points, and the average WHOQOL-BREF quality of life score was 57.66 points. The focus group interview data yielded 3 topics were named "deployment route", "the manner of exposure to Agent Orange", and "life after Agent Orange exposure". Conclusion: There is an urgent need to increase public awareness, develop a public policy response, and conduct additional research on ground occupational therapy programs that include physical therapy.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• fall
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• pp.129-131
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• 2021

본 연구의 목적은 모바일 헬스케어 앱의 사용자 경험 요인을 분석하여 제안하는 데 있다. 의료 관련 앱은 주로 의료 서비스 제공자 중심의 기능으로 디자인되어 개인의 서비스 접근성이 낮으며, 데이터 활용에 대한 고려가 부족하다. 개인이 주도적으로 건강 데이터를 활용하기 위해서는 개인 - 건강 데이터 커뮤니케이션을 고려한 앱 개발이 필수적이며, 이와 관련된 사용자 경험을 평가하는 도구가 필요하다. 먼저 문헌 조사를 통해 사용 편의성, 사용 만족도, 정보 구조, 유용성, 정보 품질, 심미성 6가지 사용자 경험 요인을 수집하였다. 이후, '나의건강기록' 앱을 대상으로 사용자 심층인터뷰를 진행하여 모바일 헬스케어 앱 사용자 경험에 영향을 주는 요인을 분석하였다. 심층인터뷰 결과, 사용자 경험 요인에 정보의 이해용이성 요인이 새롭게 도출되었다. 정보의 이해용이성은 건강 정보를 알기 쉽게 제공하여, 사용자들이 어려움 없이 정보를 이해할 수 있는 능력을 의미하고 건강정보이해능력과 관련이 높다. 각 도출된 요인은 정보 주체(사용자)의 편의성, 활용성, 유지율을 높일 수 있는 모바일 헬스케어 앱을 디자인하는 데 유용할 것으로 기대된다.