• Journal of Environmental Science International
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• v.19 no.3
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• pp.365-370
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• 2010

In this study, we carried out the evaluation of EPDM(Ethylene Propylene Diene Monomer) reclaimed rubber mixing with natural rubber at various mixing ratio to reuse as rubber filler. The scorch time and moony viscosity was analyzed to evaluate the effect of cure behavior. And also, we analyzed the tensile strength, the elongation at break and cure time to evaluate the variation of cure behavior. As the results, the scorch time and optimal cure time was decreased according to the increasing of EPDM reclaimed rubber. However, the moony viscosity was increased at each mixing ratio. In case of the added EPDM reclaimed rubber was 20 phr(parts by weight per 100 parts by weight of rubber), the hardness and specific gravity was increased a little. The hardness and specific gravity was increased in rapidly under 40 phr of the added EPEM reclaimed rubber. The tensile strength and elongation at break of the compound of natural and EPDM reclaimed rubber was rapidly decreased compared with its natural rubber when the ratio of adding EPDM reclaimed rubber was over 40 phr.

• Proceedings of the Korea Water Resources Association Conference
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• 2004.05b
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• pp.90-101
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• 2004

The present trend of disposing treated sewage water by allowing it to infiltrate the soil brings a new dimension to environmental problems. It is therefore necessary to identify the chemicals likely to be present in treated sewage water. A soil column experiment was conducted to determine the behavior of chemical species in soil columns applied with secondary treated sewage water. To predict the behavior of chemical species, a multicomponent solute transport model that includes the biochemical redox process and cation exchange process was developed. The model computes changes in concentration over time caused by the processes of advection, dispersion, biochemical reactions and cation exchange reactions. The solute transport model was able to predict the behavior of the different chemical species. The model reproduced the sequential reduction reaction. To design the safe depth of plow layer where $NO_3^-$ is totally reduced, a numerical study of $NO_3^-$ leach was done and it was found out that the pore velocity and concentration of $CH_2O$ at the inject water was found to affect $NO_3^-$ reduction in the mobile pore water phase. It is revealed that the multicomponent solute transport model is useful to design the land treatment system for $NO_3^-$ removal from wastewater.

• Journal of Korean Biological Nursing Science
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• v.19 no.4
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• pp.276-283
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• 2017

Purpose: The aim of this study was to identify the effects of environmental factors on depressive-like behavior and memory function during adolescence. We performed behavior tests in adolescent rats exposed to environmental enrichment, handling, and social deprivation for eight weeks. Methods: Wistar rats were randomly assigned to control, environmental enrichment, handling, and social deprivation groups at the age of four weeks. Results: In the forced swim test, the immobility time in the environmental enrichment group was decreased than that in the control group (p=.038), while the immobility time in the social deprivation group was increased than that in the control group (p=.035), the environmental enrichment group (p<.001), and the handling group (p=.001). In the Morris water maze test, the social deprivation group had an increased latency time than the control group (p=.013) and the environmental enrichment group (p=.001). In the passive avoidance test, the environmental enrichment group had an increased latency time than the control group (p=.005). However, the social deprivation group had reduced latency time than the socially housed groups (control: p=.030; environmental enrichment: p<.001; handling: p<.001). Conclusion: These findings suggest that environmental factors play an important role in emotion and memory function during adolescence.

• Journal of the Korean Institute of Landscape Architecture
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• v.20 no.3
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• pp.21-32
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• 1992

This paper is studied on the concept of environmental cognition on accordance with the oriental(especially Buddhism) process of thinking. The Yeongiron(theroy : one of th most famous philosophy of Buddhism, the theory of cause and occasion) consists of the upgam-yeongi, the aroeyasik-yeongi, the chinyeo-yeongi and the pupkye-yeongi. And the concept of these theory are as follows: The conceptural elements of upgam-yeongi consist of sack(色), soo(受), sand(想), hand(行), sik(識). The elements connects with the western environmental psychology such as sack and objects, soo and stimuli, sand and perception, hand and cognition, sik and behavior. Similarly, aroeyasik-yeongi that consist of sangbun(相分), kyunbun(見分), chajungbun(自證分), chungjajungbun(證自證分) connects with objects, perception, cognition, behavior too. The chinyeo-yeongi divide into smase(三細) and yukchu(육추), the samse consist of mumyungupsang(無 明業相), nungyunsand(能見相), kyungyesand(境界相) and the yukchu consist of chisang(智相), sangsoksang(相續相), chipchisang(執取相), kyemyungjasang(計明字相), kiupsang(起業相), upgyegosang(業繫苦相). These elements are relates with the concept of western environmental psychology from objects to behavior too. Pupkye-yeongi represent a characteristic of objects itself rather than a process of environmental cognition. However this study has limitations that the religion and scientific methods should be compare. sack(色) : an elements of it's derivation, all kinds of material soo(受) : a function of reception, feeling sang(想) : a representation of a thought in the mind hang(行) : mental operation sik(識) : a function of judgement sangbun(相分) : the thing in itself kyunbun(見分) : a reflection in the mind chajungbun(自證分) : confirmation of kyunbun chungjajungbyn(證自證分) : self-consciousness through self-examination mumyungupsang(無明業相) : a state of mixture with the object and the subject nungyunsang(能見相) : an operation of the subject kyungyesang(境界相) : a formation of object chisang(智相) : the beginning of distinction sangsoksang(相續相) : a judgement chipchisang(執取相) : a rsponse kiupsang(起業相) : have a influence to the next behavior upgyegosang(業界苦相) : retribution

• Journal of the Korean Applied Science and Technology
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• v.41 no.2
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• pp.208-218
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• 2024

Domestic cosmetics companies are striving to protect the environment and solve environmental problems through ESG management. This study analyzed the relationship and influence between the perceived consumption value and purchasing behavior of upcycling cosmetics according to environmental values for MZ generation women in Seoul and Gyeonggi Province. In addition, based on the research results, it was intended to provide basic data for product development and marketing strategies related to upcycling cosmetics. First, all variables were found to be positive (+) correlation. Second, it was found that the higher the environmental value, the higher the perceived consumption value of upcycling cosmetics. Third, it was found that the higher the environmental values, the higher the purchasing behavior. Therefore, it is hoped that it will induce a positive consumption value for upcycling cosmetics, and that the cosmetics industry will be helpful as basic data for the development of related products and the establishment of differentiated marketing strategies.

• Journal of the Korean GEO-environmental Society
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• v.2 no.3
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• pp.81-88
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• 2001

The behavior of porous medium is modeled by linear thermoporoelastic behavior, linear poroviscoelastic behavior, poroplastic behavior, and poroviscoplastic behavior, etc. The behavior has, in general, a complicated aspect which makes a mechanical description of the problem with time. Constitutive modeling for deformation behavior of porous medium with coupling effects is needed since there is interaction between the constituents in pores with a relative velocity to each other. In this work, it is explained 3-dimensional behavior depending on degree of saturation for porous medium composed of homogeneous, isotropic materials. It is obtained the governing equations based on continuum porous mechanics. In addition, it is developed constitutive model which can be understood of behavior for porous medium which can be understood, analysed behavior of porous medium. It can be accomplished exact analysis and prediction of behavior in porous medium. The behavior for porous medium is analysed exactly, and the prediction of deformation behavior is accomplished. Consequently, it will be basis to analyze 3-dimensional behavior in municipal solid waste landfill, and the practical using of porous medium ground which are composed of nonhomogeneous, anisotropic materials can be done widely.

• Journal of Korean Society of Environmental Engineers
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• v.30 no.2
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• pp.136-145
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• 2008

• Journal of Environmental Health Sciences
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• v.38 no.5
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• pp.448-449
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• 2012

• KIEAE Journal
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• v.4 no.3
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• pp.109-112
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• 2004

• Proceedings of the Korean Society for Environmental Edudation Conference
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• 2002.12a
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• pp.86-94
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• 2002