A STUDY ON EDUCATIONAL EFFICIENCY FOR SILVER GENERATION THROUGH ACTIVITY OF WOOL CRAFT

Eunhye Kim,Youngsuk Kwon 글로벌지식마케팅경영학회 2015 Global Fashion Management Conference Vol.2015 No.06

Korean society is aging at a fast rate and the ratio of elderly population is expected to increase by 38.2% in 2050 (Statistics Korea, 2011). The extension of average life expectancy of the elderly generation leads to various problems and the most important issue is the mental health of the elderly. The suicide rate of the elderly is increasing every year and is the highest rate among OECD nations (OECD, 2014). The primary reason for the rapidly increasing suicide rate is psychological hardship caused by personal, social, and environmental factors such as a generation gap from nuclearization, decreased social position, retirement, economic hardship, spousal bereavement, and separation. The importance of education to improve quality of life through the mental stability of the elderly generation is emphasized. Continued education has a positive effect on the physical, social, and psychological health of the elderly generation (Kim, 2011), successful aging (Jee, 2010), and quality of life (Kim &An, 2008). Arts and crafts education can achieve development in visual perception, sense of touch, and continued elderly education (Mo, 2011). Arts and crafts education improves accomplishments and creative thinking ability through analogue behavior of making by hand. This study conducted 12 hours of education for 3 days from 1pm to 5 pm at 1 week intervals on 5 elderly women between 55 and 70 years of age to investigate physical and psychological effects on elderly women through natural wool craft activity. Before the education, the anxiety degree of subjects of the past week was measured with the Beck Anxiety Inventory (BAI) to verify the effect of sensibility education by conducting electroencephalogram(EEG) and PortaLite before after conducting education on subjects. As a result of analyzing the before and after numerical mean value through brainwave test, the increasing phenomenon of an alpha waves appeared and showed that the psychology of subjects is stable and secure. The result of this study showed that wool craft education decreased anxiety, increased alpha waves and improved the psychological stability of elderly women.

Estimation of Evapotranspiration Using Temperature-based and Radiationbased Methods

Eunhye Kwon,Kyung-woo Park,Byeong-hak Park 한국방사성폐기물학회 2021 한국방사성폐기물학회 학술논문요약집 Vol.2021 No.11

Dynamic Changes of Groundwater Chemistry in the LILW Disposal Facility Along the Coastal Area

Eunhye Kwon,Jonghoon Park,Nam C. Woo 한국방사성폐기물학회 2019 한국방사성폐기물학회 학술논문요약집 Vol.2019 No.10

Hydrogeochemical Background of a Tracer Test Site for Evaluating Buffering Capacity

Eunhye Kwon,Byeong-hak Park,Kyung-woo Park 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.2

In the evaluation of the stability of radioactive waste disposal, it is imperative to take into account the concept of the redox front. Initially, this front is typically observed near the surface. However, if the hydraulic gradient increases due to the construction of a disposal facility, the redox front can potentially transport deeper into the geological environment through groundwater flow. This transport triggers changes in the geochemical characteristics, potentially diminishing the natural buffering capacity of the bedrock. Consequently, it is necessary to characterize both the unsaturated and saturated zones in the disposal site. In this context, a tracer test is a useful method to identify the characteristics of the site from the surface to the deep geological environment where the disposal facility can be located. Therefore, this study also aims to establish a methodology enabling a comprehensive understanding of the hydrogeochemical characteristics through the tracer test that can be applied to future sites for research URL (Underground Research Laboratory) or radioactive waste disposal in Korea. For the tracer test, a UNIT (UNsaturated zone Insitu Test facility) was built within the KAERI and five wells with a depth of 24 m were installed in 2022. Before conducting the test, to determine the geochemical background characteristics of the site, topsoil and soils at depths of 30 cm, 60 cm, and 90 cm were collected. Additionally, a groundwater sample was obtained from the newly installed well. Soil samples were analyzed for soil texture, moisture content, total and exchange cations, anions, and heavy metals. Similarly, the groundwater sample was analyzed for cations, anions, and trace elements. The outcomes of these comprehensive analyses will serve as the baseline values in the hydrogeochemical changes after the tracer test. This includes changes in soil composition, water quality, precipitation/dissolution processes, and mineral phases. Furthermore, these results will be provided as input parameters for surface-underground interface models in future studies.

Hydrogeochemical Evolution Process of Granite Aquifer in and Around Underground Research Tunnel

Eunhye Kwon,Kyung-woo Park,Jang-Soon Kwon,Geon-Young Kim,Ji-Hun Ryu,Yong-Kwon Koh 한국방사성폐기물학회 2022 한국방사성폐기물학회 학술논문요약집 Vol.20 No.1

The geological disposal of spent nuclear fuel is one of the important problems to be solved worldwide. For the safety of the geological disposal, disposal facility is recommended to be constructed in the deep reducing environment of host rocks. As host rocks, rock salt, argillaceous (clay) rock, and crystalline rock have been considered as stable geological formations in various countries. Although various studies have been conducted on crystalline rocks in Korea, there are still few studies on hydrogeochemical evolution in the deep and reducing environment related to the disposal of spent nuclear fuel. Therefore, this study was conducted to identify hydrogeochemical evolution process in granite aquifer which can affect the stability of disposal facility. Groundwater samples for isotope and chemical analysis were collected quarterly adjacent to KURT (KAERI Underground Research Tunnel). As the depth increased, the groundwater changed from Ca-HCO3 type to Na-HCO3 type under the influence of silicate mineral weathering, and the fluorine concentration increased due to the dissolution of fluorine-bearing minerals. However, hydrogeochemical evolution according to the depth was not observed in some wells because of a hydraulic connection through the fracture zone. In addition, the behavior of nitrate and redox-sensitive metals (Fe, Mn, U, Mo) in groundwater was clearly different in the redox condition. Considering these hydrogeochemical processes and hydrogeological factors, a conceptual model of granite aquifers in and around KURT was established. The results of this study will be used as basic data to understand the hydrogeochemical processes and to evaluate and predict the behavior of radionuclides in granite aquifer system.

Comparison of Evapotranspiration Estimated Using Simple and Complex Models

Eunhye Kwon,Byeong-hak Park,Kyung-woo Park 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.1

Surface environmental factors such as climate change can affect the safety of the disposal system by changing groundwater recharge or flow. Therefore, it is important to identify surface environmental factors and hydrogeological factors to evaluate long-term changes in hydrogeological environment of a disposal system. In particular, evapotranspiration is an important to be considered because it loses 70% of rainfall and has a great effect on groundwater recharge. Evapotranspiration can be estimated using simple or complex models based on meteorological data. Meteorological data from January 2010 to December 2022 were collected from 44 Automatic Synoptic Observation Systems (ASOS) of the Korea Meteorological Administration (KMA), which observe factors necessary for calculating evapotranspiration. For the estimation of evapotranspiration through simple models, temperature-based models (Blaney-Criddle method, modified Blaney-Criddle method, Hargreaves-Samani method) and radiation-based models (Simple Abtew method, Makkink method, Prietley-Taylor method, Turc method, Solar radiation-Maximum temperature method) were used. The calculation of evapotranspiration through the complex model used the Penman-Monteith method, which is used as a standard model in the USA, Japan, and FAO. By comparing the evapotranspiration calculated by complex and simple model, methods with small errors were identified each region. In addition, long-term climate change scenarios were applied to confirm changes in long-term evapotranspiration in South Korea. The results of this study will be used to find alternative models in the case of missing data in the Penman-Monteith model, which requires a lot of meteorological data, and can be used as basic data for calculating groundwater recharge that can affect the disposal system in the future.

〈은총으로 충만한 마리아(Maria Full of Grace, 2004)〉

권은혜(Eunhye Kwon) 이주사학회 2013 Homo Migrans Vol.9 No.-

Lab-Scale 반응기를 활용한 PCP 함유 폐기물의 열적처리 가능성 연구

권은혜 ( Eunhye Kwon ),배지수 ( Jisu Bae ),김우일 ( Woo-il Kim ),박호연 ( Hoyeon Park ),이원석 ( Wonseok Lee ),윤영삼 ( Youngsam Yoon ) 한국폐기물자원순환학회(구 한국폐기물학회) 2019 한국폐기물자원순환학회 추계학술발표논문집 Vol.2019 No.-

잔류성유기오염물질(POPs)는 독성, 생체 축적 및 장거리 이동성을 특징으로 인간 건강 및 환경 보호를 위한 국제적 관리가 필요한 물질로써, 스톡홀름협약은 국제적 기준에 따라 POPs 함유 물질을 줄이고 근절하기 위한 조치가 취해지고 있다. 2015년 POPs 검토위원회(POPRC)에서는 HCBD, PCP, PCN 3가지 물질이 새롭게 지정되었다. 본 연구에서는 스톡홀름 협약 제 4 조를 달성하기 위해 새롭게 지정된 물질 중 하나 인 PCP 함유 폐기물의 환경 친화적인 처리를 달성하기 위한 열처리 표준을 확립하고자 했다. PCP 함유 폐기물은 ① 기본 시험(국내 소각 시설 처리 기준 만족, 연소 온도 850℃, 1,100℃) 및 ② 정밀 시험(저온, 연소 온도 300℃, 500℃, 700℃). 6개의 표본(보존 목재, 탄약 목재 상자 등)을 대상 샘플로 선택하고 물리적 특성을 반영하는 열처리 요소를 도출하였다. 기본 실험에서 6개의 시료에 대한 PCP 함량 분석 결과는 0.127 mg/kg ~ 68.4 mg/kg의 농도 범위를 나타내었다. 평균 PCP 분해율은 99.999%였으며, 최대 다이옥신 농도는 4.4794 ngI-TEQ/Sm³ 검출되었다. 그리고 연소 후 배기가스에서 일반적인 대기 오염 물질의 결과, 산소 15.81 % ~ 18.35 %, CO 53.38 mg/L ~ 6,295.07 mg/L, SOx 8.81 mg/L ~ 64.67 mg/L 및 NOx 5.56 mg/L ~ 26.43 mg/L. 국내법에 제시된 배출 제한 기준과 비교하여 CO 농도는 표준 값을 초과했으며 소량의 소각로 때문에 내부 불완전 연소로 간주되었다. VOC (휘발성 유기화합물)의 경우, 벤젠, 톨루엔 등이 주로 검출되었고, 총 VOC 농도는 1,100℃ 보다 850℃에서 더 높은 경향을 나타냈다. 연소 잔류물에서 중금속의 분석 결과, Cr 및 Ni는 배출 한계 표준을 초과했으며, 이는 반응기 물질의 고온 산화 및 탈착의 결과로 간주되었다. 따라서 본 연구 결과를 바탕으로 다이옥신 전구체로 알려진 PCP로 인한 독성 물질의 생성을 방지하기 위해, 소각로의 안정적인 작동을 위해 소각로 작동 조건을 1,100℃ 및 체류 시간의 2초 이상으로 유지해야 된다고 사료된다.

자유와 부자유가 경쟁하는 접경지대로서 19세기 미국 서부

권은혜 ( Eunhye Kwon ) 한국미국사학회 2018 미국사연구 Vol.48 No.-

이 글은 스테이시 스미스(Stacey L. Smith)의 2013년 저서 『자유의 변방: 캘리포니아, 그리고 부자유노동, 해방, 재건을 둘러싼 투쟁(Freedom’s Frontier: California and the Struggle over Unfree Labor, Emancipation, and Reconstruction)』와 안드레스 헤센데즈(Andrés Reséndez)의 『또 하나의 다른 노예제: 아메리카에서 인디언 노예화 이야기 드러내기(The Other Slavery: The Uncovered Story of Indian Enslavement in America)』를 중심으로 자유의 땅 서부의 신화를 근본적으로 재검토하는 미국 역사가들의 최근 연구 경향을 분석한다. 스미스와 헤센데즈의 연구는 신서부사, 접경지대 역사, 인디언 노예제 연구사, 재건기 연방정부의 자유와 시민권 재개념화를 다룬 연구사, 횡국가적 노동사(transnational labor history) 등의 다양한 연구경향과 성과를 바탕으로 새로운 주장을 펼친다. 스미스는 남북전쟁 전후와 재건기 캘리포니아의 부자유노동 논쟁을 소개한다. 헤센데즈는 미국 서부의 지배세력 변화와 무관하게 오래 지속된 인디언의 사실상 노예화 과정을 보여준다. 두 연구가 공통적으로 보여주는 것은 19세기 미국 서부의 다인종, 다민족적 배경에서 자유와 부자유의 경계가 조우하는 과정이다. 스미스와 헤센데즈가 공통적으로 강조하는 것은 미국의 연방정부와 서부의 자유주가 주창한 해방 정치가 인디언 노예제를 포함한 기타 비백인 부자유노동체제의 장기지속성에 미친 영향이다. 미국 서부에서 존재했던 국가와 인종의 경계를 넘어서는 부자유 노동의 궤적을 추적한 스미스와 헤센데즈의 연구는 지역으로서의 미국 서부의 역사만 아니라 국가로서 미국의 역사를 바라보는 새로운 지평을 열어준다. This article analyzes the new trend of questioning the myth of the American West as the land of freedom in American history. It focuses on the two recent books: Stacey L. Smith’s Freedom’s Frontier: California and the Struggle over Unfree Labor, Emancipation, and Reconstruction, and Andrés Reséndez’s The Other Slavery: The Uncovered Story of Indian Enslavement in America. Both works are based on the various research trends relevant to the American West such as New Western History, Borderlands History, the study of Indian enslavement in the Americas, and the study on the changing definitions of freedom and citizenship during the Reconstruction era. Smith’s work deals with the controversies and realities of unfree labor in California between the 1850s and the 1870s. Reséndez highlights the continuous enslavement of Indians in the American West from the time of the Spanish Empire to the Reconstruction Era. Both works shows that the multiracial and multiethnic characteristics of the American West were the backdrop of the borderlands of freedom and unfreedom in the 19^th century.

수리지화학적 특성을 통한 제주 서부 지하수 내 질산염 거동 파악 (II)

권은혜(Eunhye Kwon),박종훈(Jonghoon Park),정의진(Euijin Chung),강봉래(Bong-Rae Kang),박원배(Won-Bae Park),우남칠(Nam C. Woo) 대한지질학회 2017 대한지질학회 학술대회 Vol.2017 No.10