• 한국디지털건축인테리어학회논문집
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• 제13권4호
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• pp.33-39
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• 2013

As lighting energy consumption in buildings occupies high ratio, technical researches to solve it have been constantly carried out. However, basic studies on light environment performance evaluation is actually deficient and only at a level of a simple illumination monitoring. Thus, this study has suggest a light environment energy performance evaluation based on actual residence environments to allow setting lighting interoperation and user required illumination. Conclusions from the study are as follows: 1) As the performance evaluation suggested by this study has not only derived lighting energy usage as well as monitored simple indoor illumination distribution, it is quantitative and allows derivation of visual results. 2) The performance evaluation suggested by this study allows inputs of user required illumination through the performance evaluation server, which is able to support for performance evaluations for various works and users. 3) This study has verified validity of the performance evaluation method by analyzing results of lighting energy reduction by executing performance evaluation on changes of light shelf that is a natural lighting system through the suggested performance evaluation method. This study is significant from a viewpoint that it has suggested a quantitative performance evaluation method on the basis of actual residence environments. Those researches concerned on the energy performance evaluation should be constantly progressed from an aspect that they are another solution of the energy problems.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2000년도 추계학술대회
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• pp.107-118
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• 2000

For the last several decades, the fate of organic pollutants has been extensively studied in natural environments with emphasis on sorption and desorption phenomena. Although the mechanisms involved are not clear yet there is a consensus about the existence of hysteresis in the sorption and desorption of organic pollutants. Furthermore, it is found that hysteresis is the outcome of slow nonequilibrium sorption of organic pollutants, which results in the formation of desorption-resistant fractions of the pollutants. Desorption-resistant fractions may increase as a function of the residence time of the pollutants in the environments. Field monitoring data show a slow but continuous decline of chemicals applied to soil, followed by little or no subsequent disappearance. One plausible explanation for such resistance to biodegradation, desorption, or extraction can be attributed the gradual movement of organic pollutants to less accessible remote sites inside the matrix with time. This phenomenon has been termed sequestration or aging. The fact that some pollutants are sequestered in soil with time may have a great impact on bioremediation and risk assessment, Some portion of the resistant pollutants may still be present in the environments after bioremediation. It requires vigorous means to completely remove the aged portion that may not be further bioavailable. However, precaution should be taken since aging is not always evident. Aging seems to be soil and chemical specific.

• 한국CDE학회논문집
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• 제21권1호
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• pp.20-30
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• 2016

Recently immersive virtual reality (VR) becomes popular due to the advanced development of I/O interfaces and related SWs for effectively constructing VR environments. In particular, natural and intuitive manipulation of 3D virtual objects is still considered as one of the most important user interaction issues. This paper presents a comparative study on the manipulation and interaction of 3D virtual objects using different interfaces and interactions in three VR environments. The comparative study includes both quantitative and qualitative aspects. Three different experimental setups are 1) typical desktop-based VR using mouse and keyboard, 2) hand gesture-supported desktop VR using a Leap Motion sensor, and 3) immersive VR by wearing an HMD with hand gesture interaction using a Leap Motion sensor. In the desktop VR with hand gestures, the Leap Motion sensor is put on the desk. On the other hand, in the immersive VR, the sensor is mounted on the HMD so that the user can manipulate virtual objects in the front of the HMD. For the quantitative analysis, a task completion time and success rate were measured. Experimental tasks require complex 3D transformation such as simultaneous 3D translation and 3D rotation. For the qualitative analysis, various factors relating to user experience such as ease of use, natural interaction, and stressfulness were evaluated. The qualitative and quantitative analyses show that the immersive VR with the natural hand gesture provides more intuitive and natural interactions, supports fast and effective performance on task completion, but causes stressful condition.

• 자원환경지질
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• 제56권5호
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• pp.565-580
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• 2023

본 연구에서는 고준위방사성폐기물 처분안전성 입증 및 신뢰성 향상을 위한 처분자연유사연구의 역할과 중요성을 개괄적으로 조사하였다. 아울러 지하 처분환경에서 복잡하고 다양한 핵종거동을 규명하고 해석하기 위한 우라늄광상을 이용한 국내외 자연유사연구 동향을 고찰하였다. 또한 국내 옥천변성대 우라늄광상을 포함하는 우라늄광상 지하수와 암석에서의 우라늄의 거동특성과 지질환경에서의 우라늄의 생지화학적 상호작용을 조사하였다. 비록 우라늄광상에서 획득한 우라늄 거동 특성 자료들은 처분안전성평가에 직접적으로 활용하는 데는 많은 제약과 불확실성을 내포하고 있지만, 우라늄광상을 통해 획득한 자료와 정보들은 처분안전성평가와 Safety Case 구축에 정성적으로 또는 일부 정량적으로 활용될 수 있을 것이다.

• 디자인학연구
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• 제20권
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• pp.211-217
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• 1997

천연염색은 인공염료로 인한 환경오염으로부터 자연을 보호하고, 천연 염색된 섬유는 해충으로 인한 인체의 피해를 막아주어 의복, 침구 류로 개발 가능하며, 또한 색상도 중간계열이 많아 자연스런 이미지를 연출 할 수 있다. 본 연구는 값싸고, 쉽게 구할 수 있는 천연염색 재료를 다양한 색상으로 개발 할 수 있어 고부가가치를 지닌 제품 생산으로 유휴농지의 활용과 함께 농가의 수익을 올릴 수 있다. 전라남도 무안 지방에서 대량으로 생산되는 양파껍질을 다양한 섬유에 염색하여 노랑 색에서 연갈색, 회색계열까지 여러 가지의 색상이 추출된다. 이렇게 염색된 섬유의 세탁, 마찰, 물, 땀, 일광 견뢰 도 측정을 통해 실험하였더니 그 결과 견뢰 도가 전체적으로 우수하여 천연 산업 염색재료로서의 가능성을 발견하였다.

• 한국환경과학회지
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• 제32권12호
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• pp.979-985
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• 2023

After the outbreak of COVID-19, the demand for home-enjoyable video games has surged, driven by extended pandemic conditions and resulting in rapid graphic technology advancements. Consequently, games with diverse expression techniques have emerged, captivating players. Virtual Reality (VR) environments predominantly feature natural landscapes, with advancing graphic technology enabling lifelike scenes. The rise in individuals seeking solace through natural elements in games has followed suit. As VR technology and metaverse interest grow, more people are exposed to digital imagery. However, evidence on the influence of graphic expression methods on emotional response to that is lacking. Our study examined user emotional responses, focusing on natural landscapes in digital graphics of games. Analyzing a group of 47 young adults as frequent digital media consumers, we studied reactions to different image styles (Realism, Semi-Realism, Stylized). In the analysis, Realism-style images were perceived the most positively, while emotional responses to natural landscapes with different graphical expressions showed no significant differences. Results suggest that recognizing digital natural landscapes may outweigh expression style impacting the evaluation of digital nature. This study's empirical analysis enhances the understanding of digital nature's application to actual situations.

• 한국관개배수논문집
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• 제6권1호
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• pp.116-132
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• 1999

The agricultural water and filmland are two essential resources that should be conserved to ensure the sustainable agriculture and the sound rural society. The natural and socio-economic environments in Korea urgently require the conservation of agricultu

• 한국환경생태학회:학술대회논문집
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• 한국환경생태학회 2010년 학술대회 논문집
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• pp.81-83
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• 2010

• 한국조경학회지
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• 제20권2호
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• pp.62-75
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• 1992

To investigate the traditiional gaden style of Sang ju Districts, 5 renown houses of noble family in Lee Dynasty were chosen to surey the environmental landscape and characteristics inner and outer space. 1. Traditional houses were located in natural environments based on topography(pung su-ji ri : forming philosophy of Taoism Buddbism and Korean native Sharmanism) which were reflected the 5 Elements of positive and Negative(Yin and Yang 5 Elements) 2. The formation of space is made of oblong by fence arrangement of dwelling housos has An Chae and Sa Rang Chae, and inner court of Anchae has style of oblong, and outer court of Sa Rang Chae has style of sililar oblong. Inner court is closed and outer is half opened. 3. Flow planning is straight and blique line because arrangement of dwelling houses is formed by theory of Dong-Suh Sa Taek(東西四宅), the flowing is complicated and connected from gate to room of An Chae. 4. Character of garden have simple neat whereas vegetable yard, green shade tree, and fruit trees have. Houses were built with their natural environments and streams in order to borrow landscaping in Sa Rang Chae. Specially they were not built pond. 5. Houses has one or two vegetable yard along inner and outer space and are seen as mixed planting more deciduous trees than evergreen trees.

• Journal of Microbiology
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• 제34권3호
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• pp.241-247
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• 1996

The stability of the genetically engineered microorganisms and their recombinant plasmids released in natural environments has been regarded as one of the molecular ecological topics. In this study, the recombinant plasmids pCU103 in which the pcbCD genes involved in biodegradation of biphenyl and 4-chlorobiphenyl were cloned in pBluescript SK(+) vector, were examined for their structural and functional stability in different waters at 15 $^{\circ}C$ by the methods of electrophoresis, Southern hybridization, quantification with fluorescent dye, and transformation. The recombinant plamids maintained their stabilities for about 30 days in sterilized distilled water (SDW), 15 days in autoclaved creek water (AW), 25 days in filtered and autoclaved non-sterile creek water (FAW), 4 days in Luria-Bertani (LB) broth, and less than one day in filtered non-sterile creek water (FW). The covalently closed circular (CCC) form of the plasmid was decreased and open circular (OC) form was increased as a function of incubation time, and then linear (L) form was produced to be ultimately degraded out. The degradation rates of the plasmid were proportionally correlated to trophic level of the water, and the biological factor such as DNases was found to be one of the most critical factors affecting structural and functional stability of the plasmid in non-sterile natural water.