• Mineral and Industry
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• v.14 no.1
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• pp.1-17
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• 2001

국내에서 천연 제올라이트는 부존자원으로서의 높은 잠재성에도 불구하고, 용도개발에 대한 연구개발이 부진하여 관련산업이 활성화되지 못하고 있는 실정이다. 환경개선용 기능성 소재로서의 천연 제올라이트의 응용이 앞으로 국내에서 천연 제올라이트의 부가가치 향상을 도모할 수 있는 효과적인 방안이 될 것으로 생각된다. 환경산업 분야에서는 천연 제올라이트가 합성 제올라이트와의 경쟁관계에서 유리한 위치를 점유할 수 있을 것으로 판단된다. 환경산업에서 천연 제올라이트의 새로운 수요처가 형성되면 기존의 저급한 용도보다 한 단계 향상된 부가가치의 창출이 가능할 것으로 여겨진다. 국내산 천연 제올라이트의 자원잠재성과 부가가치를 제고시키기 위해서 앞으로는 관련산업이 응용광물학적 지식기반 산업으로 전환되어야 한다. 또한 지금까지 국내에서 천연 제올라이트에 관례적으로 적용되어 왔던 화학조성 및 CEC 분석자료에 의거한 제올라이트의 품위 및 품질 평가 방식에서도 개선과 보완이 요구된다. 특히 X-선회절 정량분석, 전자현미경관찰, 선택적 이온교환 및 흡착특성과 관련된 실험 등을 통해서 천연 제올라이트의 품위와 품질이 보다 정밀하게 감정되고 평가되어야 할 것으로 여겨진다. 따라서 앞으로는 천연제올라이트의 부가가치 향상을 위한 연구개발과 산업응용은 반드시 제올라이트의 세공구조, 광물상, 광물 조성 및 특성에 대한 이해와 지식에 기반하여 이루어져야 할 것이다.

• Science of Emotion and Sensibility
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• v.16 no.1
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• pp.65-74
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• 2013

The visual sensibility and preferences are closely related with color combinations, stripe intervals, and stripe complexity. We studied the effect of stripes characteristics on visual sensibility and preferences for men's shirts fabrics. As a result of a factor analysis, the adjectives were classified by viewers into 5 factors as attraction, maturity, dignity, practicality, and simplicity. We found that stripe intervals had a significant visual effect on maturity, dignity, and practicality. The uneven stripes had higher scores for dignity and practical while lower for mature. The stripes with consecutive order of two different thickness were felt more strongly in attractive, practical, and preferred. The results also showed that stripes with compound and contrast colors were attractive and preferred.

• Geophysics and Geophysical Exploration
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• v.20 no.3
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• pp.137-145
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• 2017

High-grade limestone applied to various chemical industries is abundant within upper Pungchon formation in Taebaeksan basin, South Korea. Geophysical exploration is one of the most efficient methods to investigate subsurface geological structure in an extensive area. Since the geophysical exploration for the high-grade limestone has rarely been conducted in Korea, its appropriate strategy has not been set up yet. In this study, we focused on to suggest the reasonable strategy and accumulate geophysical databases which are essential for interpreting geophysical images by characterizing laboratory physical properties of in-situ rocks. Hence, rocks were obtained from drilled cores consisting of lower Hwajeol formation, Pungchon formation, and dykes in Jeongseon area, Gangwon province. Geophysical laboratory experiments and petrography of the rocks were conducted. Since susceptibility values of the rocks in Pungchon Formation were obviously lower than those of upper Hwajeol and dykes, it is considered that the lithological boundaries could be distinguished by magnetic survey. In addition, electrical properties of the rocks in middle Pungchon formation were relatively different compared with those of upper/lower Pungchon formations. Thus, induced polarization is shown to be able to detect the high-grade limestone in upper Pungchon formation.

• Journal of the Mineralogical Society of Korea
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• v.19 no.4 s.50
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• pp.311-324
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• 2006

In the Pohang-Gampo area, several diatomite beds occurred in mostly thinner than 1 m are embedded in the Pohang Formation of marine environment and the pyroclastic Eoil Formation. The diatomite from the Eoil Formation is constituting the high-grade ore altered slightly by diagenesis. In contrast, the diatomite intercalated within the upper horizon of the Yeonil Group is comparatively low-grade and highly altered in places. During diagenesis, an increasing of crystallinity of opal, i.e., the original mineral component of diatom, results in ultimately the mineral transition to quartz with accompanying a drastic change in morphology and texture of the altered diatomite. The diagenetic alteration appears to have undergone by way of the chemical diagenesis, which is largely controlled by degree of fluid contact, rather than burial diagenesis. For the diatomite from the Pohang-Gampo area, careful SEM observations, XRD, chemical analyses, and determination of specific surface area were done to identify the fossil species, mineral and chemical composition, and other physical properties in the view of assesment of grade and quality. The domestic diatomite ores are evaluated to be not good in grade and quality, compared to those of famous foreign localities. However, some diatomite deposits of marin,: origin from the Pohang Formation is constituting a peculiar clay-rich type, i.e., moler applicable to the special usage such as a manufacturing of lightweight brick. Because such a diatomite is frequently intercalated relatively as a thicker bed in the upper part of the Yeonil Group, a systematic and careful investigation should be done for the exploitation and development of an economic diatomite deposit of the moler type.

• Journal of Hospice and Palliative Care
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• v.15 no.4
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• pp.193-204
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• 2012

Purpose: This correlation study was performed to examine Korean adults' perceptions and attitudes towards death with dignity and the withdrawal of life sustaining treatment and to identify factors that predict their attitude towards death with dignity. Methods: The study was conducted using convenience sampling of 291 adults from three towns of a metropolitan city in Korea. Data were collected using structured questionnaires which surveyed people's perception about and attitudes towards withdrawal of life sustaining treatment and scaled their attitude towards death with dignity. Data were analyzed by using descriptive statistics, Pearson correlation coefficients and multiple regression. Results: The attitude towards the withdrawal of life sustaining treatment and death with dignity showed a significant positive correlation (r=0.49, P<0.001). For attitudes towards death with dignity, significant predictors were attitudes towards the withdrawal of life sustaining treatment, age, religion, a proper withdrawal process and advanced medical directives, which explained 49.3% of total variance. Conclusion: The results of this study may contribute to development of a new medical decision-making system including nurses' appropriate roles in the process of withdrawing life sustaining treatment and advanced medical directives.

• Proceedings of the Korean Vacuum Society Conference
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• 2009.08a
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• pp.417-417
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• 2009

• Journal of the Mineralogical Society of Korea
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• v.29 no.4
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• pp.179-190
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• 2016

X-ray diffraction analysis, chromaticity measurement, execution and evaluation by Dancheong artisan, accelerated weathering test, and fire resistance test were conducted to test the applicability as a Dancheong pigment raw materials of Korean low grade kaolin in cultural properties. The ores that feldspar rich and composed of fine particles (< $38.1{\mu}m$) showing advantageous for the inherent purpose of the white pigment than that of high grade kaolin. And the test of whiteness, concealment force, outdoor exposure durability and fire resistance shows similar or better result than existing products (Hobun and Sanhwa jidang). In conclusion, it is expected that the use of fine feldspar rich white soil and low-grade kaolin can be used as a white pigment raw materials which have similar to better material properties and economic efficiency than existing products.

• Korean Chemical Engineering Research
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• v.49 no.5
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• pp.639-643
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• 2011

Fry-drying of coal slurry is one of the upgrading low rank coal processes. It consists of slurry mixing, slurry dewatering, solvent recovery and briquetting. Cost estimation and economic feasibility are examined for the upgrading low rank coal process based on capacity of 1 million ton/yr. In case that investment costs are $100,000,000, discount rate is 12%, and service life is 20 years, the results of economic analysis are enough to satisfy the evaluation criteria of investment such as IRR, B/C ratio, NPV and discounted payback period. According to sensitivity analysis, investment value are very sensitive to raw material cost and product price. Since the bituminous coal price is currently soaring, it is expected that the investment value will increase more and more.

• Journal of the Korea Organic Resources Recycling Association
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• v.23 no.4
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• pp.11-20
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• 2015

In the present work, a basic study on the in-situ biogenic methane generation from low grade coal bed was conducted. Lignite from Indonesia was used as a sample feedstock. A series of BMP (Biochemical Methane Potential) tests were carried out under the different experimental conditions. Although nutrients and anaerobic digester sludge were added to the coal, the produced amount of methane was limited. Both temperature control and particle size reduction showed little effect on the increase of methane potential. When rice straw was added to lignite as an external carbon source, methane yield of 94.4~110.4 mL/g VS was obtained after 60 days of BMP test. The calorific value of lignite after BMP test decreased (4.5~12.1 %) as increasing the content of rice straw (12.5~50 wt % of lignite), implying that anaerobic digestion of rice straw led to partial degradation of lignite. Therefore, rice straw could be used as an external carbon source for the start-up of in-situ biogas generation from low grade coal bed.

• Journal of the Korean Society of Costume
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• v.54 no.5
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• pp.95-107
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• 2004

Elegance in dress has existed as one of the important archetypes of aesthetic consciousness through the times. Nevertheless, there has generally been Ignored the Idea of analyzing it. The purpose of this study is to provide a framework for a better understanding of the beauty of dress by constructing the concept of elegance in dress as both one of aesthetic categories in dress and refined taste in the sociocultural contexts. For the purpose, the documentary study in sociocultural and aesthetic contexts has been executed. Considering from the holistic viewpoint, elegance in dress is based upon the idea of aristocratic taste cultivated by good breeding. It is expressed visually through not only the carefully contrived dress hut also a sort of aura of dressed body - a combination of appearance, behavior, attitude, manner etc.- with skillful ease. The aesthetic values of elegance consist of luxury, nobility, refinement, femininity, harmony Luxury means rarity and opulence of materials, craftsmanship for excellent qualities, genuineness. Nobility, related to the lady and the gentleman, can be explained as neatness. decency. modesty. and appropriateness for formal occasions. Refinement involves artifice, sophistication, maturity, and subtleness. Femininity reflects the characteristic of feminine attractiveness such as the dainty, the florid, the sweet. Harmony means organic unity. matching with body, moderation in opposition to exaggeration. These values has rather interactivity than exclusion. It is refinement and harmony that are centered on of all values.