• 한국환경과학회지
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• 제31권12호
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• pp.1013-1025
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• 2022

This study was carried out to analyze water cycle characteristics and evaluate water retention function in Jeju Gotjawal forest from 2013 to 2017. The average ratio of throughfall, stemflow, interception loss in Seonhul Gotjawal (SH) and Cheongsu Gotjawal (CS) was 43.1%, 15.8%, and 41.1%, respectively. Rainfall-throughfall, rainfall-stemflow, and rainfall-interception loss were expressed as linear regression equation (p<0.001). The comparison results showed that SH was higher than CS (p<0.05), indicating that the canopy area had an important effect on the difference in stand structure. The average water resources retention rate of the Gotjawal region was 41.9%, which is similar to the total water resources retention rate (40.6%) of Jeju Special Self-Governing Province (JSSGP). Currently, the development of Gotjawal is in progress in JSSGP. The development of Gotjawal will lead to a decrease in the water resources retention rate due to changes in the surface environment such as an increase in impervious areas, which will affect the total groundwater content of JSSGP. Therefore, the conservation of the Gotjawal area is judged to be very important from the point of view of water conservation.

• 한국환경보건학회지
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• 제14권2호
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• pp.29-41
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• 1988

This study was performed to investigate the air pollution levels in Daegu area titrough measuring of contents of water, chlorophyll, water soluble sulfur and lead metal in the leaves of roadside trees and chemical properties of soil under the urban trees. The results can be summarized as follows 1. The range of water content was from 60.4% to 74.6%. The comparisons of chlorophyll, water soluble sulfur and water content were regression equation, chlorophyll=0.1981+ 0.0040 water content (July), water soluble sulfur=3,139-0.0416 water content (July). and correlation coefficient, r=0.561 and r=0.549 respectively 2. Average contents of chlorophyll, water soluble sulfur and lead metal in the leaves of roadside tree at sampling sites were chlorophyll 0.050, 0.072mg/cm$^2$, water soluble sulfur 0.244, 0.333%, and lead metal 12.25, 12.68ppm in Oct. and Jul. respectively. 3. Correlation between chlorophyll and contents of water soluble sulfur and lead metal in the leaves of roadside tree at sampling sites were water soluble sulfur r=-0.564, -0.613 and lead metal r=-0.693, -0.699 in October and July, respectively. 4. Correlation between chlorophyll and water content, water soluble sulfur and lead metal in the leaves of tree showed positive significance.

• 한국지반공학회논문집
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• 제21권2호
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• pp.93-103
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• 2005

본 연구에서는 저주파수 영역에서 유전상수 측정시 발생할 수 있는 왜곡효과를 규명하고, 함수비에 따른 사질토의 유전상수 변화를 실수부와 허수부를 구분하여 조사하였다. 축전기 형태의 셀에서 유전상수를 측정하는 경우 100kHz 이하의 주파수 영역에서 전극분극효과에 의하여 실제 매질의 유전상수보다 크게 측정되었기 때문에 전극 분극효과에 의한 영향을 배제하기 위해서는 100kHz 이상의 주파수에서 유전상수가 평가되어야 하는 것으로 판단되었다. 함수비에 따른 사질토의 유전상수를 평가한 결과 체적함수비 증가에 따라 연속적인 증가경향을 나타내었다. 이는 유전상수 실수부의 경우에는 사질토에서 발생하는 분극이 단위체적당 쌍극자 모멘트에 비례하기 때문이며, 유전상수 허수부의 경우에는 함수비 증가에 따른 전도손실량이 증가하기 때문이다. 그러나 유전상수 실수부에서의 체적함수비에 따른 증가경향은 공간전하분극의 영향이 크지 많은 1MHz 이상의 주파수 영역에서 유효한 것으로 나타났다.

• 한국환경과학회지
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• 제26권10호
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• pp.1155-1166
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• 2017

This study selected commonly known species of fruit trees, and re-selected the species that endure the stress of extreme cold weather and physiologically restore themselves to the previous state until the following year. Then we could go ahead to propose the species that were appropriate as urban greening plants in weather condition of any part of the country. To do this, we conducted an experiments for six species of fruit trees based on the preference of the general public and recommendation of the experts; Morus alba (English name: mulberries), Diospyros kaki (English name: Persimmon), Prunus persia (English name: Peach), Elaeagnus umbellata var. coreana (English name: Korean Autumn Olive), Malus domestica 'Alps Otome' (English name: Alps Otome), and Prunus mume (English name: Blue Plum). The experiment verifies whether the trees survive without any stress from the cold weather under the national climate conditions (one in the suburbs of Seoul: Yongin city, one in the central Chungcheong region: Daejeon city, and in the southern Gyeongsang region: Jinju city in Korea). The experiment lasted for a year from August 2016 to August 2017. The levels of electrolytic efflux, chlorophyll content, plant height, fresh weight, and dry weight were measured four times (on August of 2016, January, February, and August of 2017) for each tree planted bare ground outdoors. Results showed that Diospyros kaki, Prunus persia, and Malus domestica 'Alps Otome' were proven durable and resistant to winters of all three areas (one in the suburbs of Seoul: Yongin city, one in the central Chungcheong region: Daejeon city, and in the southern Gyeongsang region: Jinju city in Korea). Especially, the increase of chlorophyll content and the reduction of electrolytic efflux were noticeable in Prunus persia than in the other two species, proving itself as the most cold-tolerant among the six species used in the experiment. In addition, interpreting from the physiological restoration data of one-year span before and after getting through winterer, Prunus persia was proven to be the most cold-tolerant species.

• 한국실내디자인학회논문집
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• 제25호
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• pp.111-118
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• 2000

This study examines the space composition and character of Elizabethan Theater base on the theory of drama and Shakespeares play in the english traditional theater. Contemporary multi purpose theater and public space is considered as a symbolic representation of the Elizabethan theaters organization and renaissance culture. In the historical theory, the Shakespeares theater was a common tool and best systeme in reflecting peoples lives. This role of theater as mass culture and new style of theater permanent design has get its value with the population increase and the urban centralization of the city and urban common sense. This study attempts to reevaluate the need of public space in modern society through a critical review of theater and its use as a open space design. Content analysis was used to discuss the topics of this study including the historical background of the theater, the relationship between Greek culture and modern design, and the role of scenery, auditorium and its impact on urban environment. The scope of the study is limited to the comparison of Elizabethan theater and space use program from the space critic and sociologist. Today the concept of theatrical space is altered with the advent of non-objects and multi media space. This study provides insights for the future implications of theatrical space in developing public space for its a new definition as cultural representation.

• 한국실내디자인학회논문집
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• 제26호
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• pp.35-41
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• 2001

This study examines the space composition and character of Baroque Theater base on the theory of drama and play in the european traditional theater. Contemporary multi purpose theater and public space is considered as a symbolic representation of the baroque theater's organization. In the historical theory, baroque theater was a common tool and best systeme in reflecting people's lives. The role of theater as mass culture and new style of theater permanent design had get its value with the population increase and the urban centralization of the city and urban common sense. This study attempts to reevaluate the need of public space in modern society through a critical review of theater and its use as a open space design. Content analysis was used to discuss the topics of this study including the historical background of the theater, the relationship between renaissance culture and modern theater design, and the role of scenery, auditorium and its impact on urban environment. The scope of the study is limited to the comparison of baroque theater and space use program from the space critic and sociologist. Today the concept of theatrical space is altered with the advent of non-objects and multi media space. This study provides insights for the future implications of theatrical space in developing public space for its a new definition as cultural representation.

• 한국환경과학회지
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• 제18권1호
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• pp.113-127
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• 2009

This study was designed to present a river model with an aim at restoring the ecosystem and improving the landscape along the urban rivers on the basin of the Namhan river, a core life channel for the National Capital region. The revelation of botanical status, transition trend and correlation of plants might lead to providing the urban river restoration projects and ecological river formation projects with basic data for a model of ideal aquatic ecology and landscape. The outcomes of this study could be summed up as follows: 1. Communities of Juglans mandshurica, Cornus controversa and Fraxinus mandshurica constitute the main portion of flora at or around uppermost branch streams of the River Namhanis harbored mainly in and around small brooks 2. Typical terrestrial forest communities formed around the River Namhan are composed mainly of Larix leptolepis, Pinus rigida, planned forestation of Pinus koraiensis, Quercus acutissima, Quercus variabilis and Pinus densiflora. 3. The analysis into terrestrial environment of plant communities showed a high content of $P_2O_5$, typical communities found in the artificially disturbed land Finally, it seems also desirable to continue to make every exertion to explore the relationship between fluvial and terrestrial ecologies with a purport of building up a model of natural streams in urban area based on the surveyed factors for plant life, forest communities, soil and landscape and, moreover, on the forecasting for overall influences derived from the relation upon the ecosystem.

• International Journal of Concrete Structures and Materials
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• 제18권3E호
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• pp.165-171
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• 2006

Environment-friendly materials are increasingly used as building construction materials nowadays, and the market share of those is growing. Accordingly, the research and developments in terms of environmental value are progressing steadily now. The main characteristics of environmental products are far-infrared radiation, negative-ion emission, electromagnetic wave shielding, and antimicrobial property. These products are often used in mortar and as spray on the finishing material. Nevertheless, there are hardly any research on the functional properties of concrete, the main material in construction field. Thus, we evaluated such basic properties of concrete as slump, compressive strength and air content while using such functional materials as sericite, wood-pattern sandstone, carbon black and nano-metric silver solution to focus on their functional properties like far-infrared radiation, negative ion emission, electro magnetic wave shielding, and antimicrobial activity in this research. The results indicated that the most useful material in the functional materials was carbon black. Sericite and nano-metric silver solution had a little effect on the functional property. Moreover, although wood-pattern sandstone had very high functional property, it exhibited too low compressive strength to be applied, to concrete as a factory product. Antimicrobial property of nano-metric silver solution in the concrete was not clear demonstrated, but if these specimens were to be aged in $CO_2$ gas for a long time, it might be apparent.

• 한국실내디자인학회논문집
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• 제27호
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• pp.104-110
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• 2001

This study examines the space composition and character of German Modern Theater barre on the theory of typology and interpreter in the european traditional classic theater. Contemporary multi purpose theater and public space is considered as a symbolic representation of the classic theater's organization. In the historical theory, modern theater was a common tool and best systeme in reflecting people's lives. This role of greece-roman theater as life cycle and new style of theater permanent design has get its value with the population increase and the urban centralization of the city and urban common sense. This study attempts to reevaluate the need of space typology in modern society through a critical review of theater and its use as a open space design. Content analysis was used to discuss the topics of this study including the historical background of the theater, the relationship between amphitheater and modern theater design, and the role of scenery, auditorium and its impact on urban environment. The scope of the study is limited to the comparison of classic theater and german modern theater space use program from the space critic and sociologist. Today the concept of theatrical space is altered with the typology of classic and interpreter space. This study provides insights for the future implications of theatrical space in developing public space for its a new definition as cultural representation.

• 한국농촌간호학회지
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• 제3권1호
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• pp.44-52
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• 2008

Purpose: This research was done to analyze factors influencing satisfaction level with welfare services by elderly people living in a mixed urban and rural area and to identify directions for improvement of service by examining characteristics of the recipients, type and content of services and the correlation between the level of satisfaction and related factors. Method: The 102 elderly people receiving services from 4 institutions in a mixed urban and rural area were selected. The results of the research include the following. Results: First general characteristics of the service-recipients, and the actual condition of the service; Second, correlation between satisfaction level of the recipients and their economic condition, health condition and activities of daily living; Third, analysis of level of satisfaction related to type of services, frequency, time required, desire of the recipients and their attitudes; Fourth, satisfaction and related factors were identified and used to identify possible problems and directions to improve service. Conclusion: The results suggest the following as ways to improve service and to increase the level of satisfaction 1) Individualization of services 2) Improvement in the way of selecting recipients 3) Reinforcement of special training courses for service providers.