• 한국환경보건학회지
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• 제23권3호
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• pp.56-65
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• 1997

Chemical analysis, statistical analysis and geochemical study were carried out to investigate the influence of the geology on the chemical characferistics of the mineral water in Taegu area. A simple comparision between the chemical components of the mineral water and their bedrocks indicates that the bedrock types in the catchmerit area control the chemical characteristics of the surface water. However more objective evidences for the mineral water-bedrock relationship come from the statistical analyses(cluster analysis and factor analysis). The results of the statistical analyses suggest that the bedrock type factor explains the data variation seven times as much as pollution does, which evidently indicates that the bedrock in the study area mainly control the mineral water chemistries. The results of comparision of the statistical analyses results with the mineral weathering reactions and mineral stability diagrams can be summarized as follows: 1. Plagioclase weathering to kaolinite provides SiO$_2$ , Ca$^{2+}$ and Na$^+$, and muscovite weathering to kaolinite provides K$^+$, and amphibole and mica minerals weathering to kaolinite provides F to the mineral water. Most of Ca$^{2+}$ and Mg$^{2+}$ in the mineral water are the products of carbonate mineral dissolution. SO$_4^{2-}$ may be the byproduct of sulfide oxidation. 2. The weatering of silicate mineral produces Ca-rich smectite and kaolinite, but Ca-rich smectite is unstable and will be transformed to more stable kaolinite because of the continuous dilution of the mineral water by precipitation. By Hashimoto's Mineral Balance Index, S-10 and S-12 mineral spring water were evaluated tasty and healthy water, S-9 and S-11 mineral spring water were evaluated tasty water and S-7, S-8 and S-13 mineral spring water were evaluated healthy water.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
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• pp.662-663
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• 2004

In general, mineral resources prospect is performed in several methods including geological survey, geological structure analysis, geochemical exploration, airborne geophysical exploration and remote sensing, but data collected through these methods are usually not integrated for analysis but used separately. Therefore we compared various data integration techniques and generated final mineral resources potentiality map.

• 한국전기전자재료학회논문지
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• 제28권4호
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• pp.238-243
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• 2015

The vegetable insulating oils are substitute for the mineral oil in power transformer. Vegetable insulating oils has higher flash/fire point and biodegradability than conventional mineral oils. In this paper, we investigated the dissolved gas analysis of vegetable oils. In the experiment, I had to accelerated aging under the same conditions mineral oil and vegetable oils. Accelerated aging proceeded to about 100% of the life of oil-filled transformer. In addition, we performed gas analysis of insulating oil of accelerated aging progress. The experiment results of the five gases was measured with the exception of Hydrogen and Acetylene. The mineral oil and vegetable oils gas is generated in a similar tendency depending on the accelerated aging. As a result, vegetable oils, can be dissolved gas analysis by method such as mineral oil.

• 자원환경지질
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• 제47권3호
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• pp.303-316
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• 2014

이 연구는 1976년부터 2013년까지 총 38년간 광물자원조사 및 광상분야의 연구추이분석과 연구생산성 제고를 위해 수행되었다. 광물자원조사 및 광상분야는 지난 38년간 281과제, 674.1억원('13 현재가 환산, 1,070.7억원)이 집행되었다. 연구비는 1976년 1.08억원에서 2013년 64.2억원으로 59.4배 증가하였고, 2013년 현재가치로 환산하여 1976년 6.57억원에서 64.2억원으로 9.8배가 증가하였다. 세부분야별로는 조사 90과제(32%), 성인 기초연구 54과제(19%), 탐사 48과제(17%), DB정보화 37과제(13%), 광물광상 25과제(9%), 기타 27과제(10%)이었다. 38년간의 광물자원조사 및 광상분야 연구추이분석을 기반할 때, 연구생산성 제고를 위해서는 조사기술의 반복적 활용과 더불어 조사관련 기술개발이 강화되어야 할 것이다.

• 대한물리치료과학회지
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• 제8권2호
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• pp.1015-1021
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• 2001

Objectives: The objective of this study was to investigate analysis of women with low back pain and osteoporosis were measured for 40 normal in the women from July 20, 2000 to October 20, 2000. Methods: Bone mineral density(BMD) of lumbar spine was measured using energy absorptiometry and were correlated with age, calcium. alkaline phosphatase. bone mineral density standard T scores(p<0.05). Results: The bone mineral density of the lumbar spine decreased with aging, The bone mineral density of the lumbar spine decreased with the serum calcium and phosphate increased. The mean bone mineral density of the lumbar spine of healthy women in age($50\sim59$) was $0.83g/cm^2$, the lumbar spine of women low back pain in age($50\sim59$) was 0.75 glad. Conclusion: In the multiple regression of risk factors to bone mineral density(BMD) of lumbar spine were correlated with age, of abortion, calcium, bone mineral density standard T scores(p<0,05). In the prevention and early diagnosis and treatment of osteoporosis, the physician should consider the risk factors.

• The Journal of Korean Physical Therapy
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• 제15권4호
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• pp.466-478
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• 2003

This study was to evaluate the body composition and bone mineral density according to aging in adult and investigated the relationship between various parameters such as body mass index(BMI), bone mineral density(BMD), bone mineral content(BMC), lean body mass(LBM), fat mass(FM) and the value obtained from dual energy X-ray absorptiometry(DEXA). The subjects were composed of healthy adult male and female who were $20^{\sim}73$ years old and they were divided three group according to age (A group : 20-39 yrs., B group : 40-59 yrs., C group : more than 60 yrs.). The conclusion derived from statistical analysis was as follows : 1. Bone mineral content and density were significantly affected by lean body mass(relatively, R=0.85 - 0.63). 2. There was significant difference among age groups in total bone mineral density. 3. There was significant difference among age groups in bone mineral content of male and female. 4. Lean body mass is diminished according to age, but there was not significant difference among age groups. 5. Fat mass of A group in male had the highest mass and followed by C group and B group. In female groups, fat mass of A group had the highest mass and followed by B group and C group. Abdominal fat mass is increased according to age. This result suggest that aging was closely relation with loss of muscle mass, bone mineral density and bone mineral content.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2005년도 INTERNATIONAL SYMPOSIUM ON SOIL & GROUNDWATER ENVIRONMENT
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• pp.218-219
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• 2005

• 한국디자인학회:학술대회논문집
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• 한국디자인학회 1998년도 봄 학술대회 발표논문집 디자인 학 연구
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• pp.68-69
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• 1998

• 한국진공학회:학술대회논문집
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• 한국진공학회 2004년도 제27회 학술발표회 초록집
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• pp.190-190
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• 2004

• 동굴
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• 제70호
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• pp.45-50
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• 2006

The magnetic polishing is the useful method to finish using magnetic power of magnet. This method is one of precision polishing techniques and has an aim of the clean technology using for the pure of gas and inside of the clean pipe for transportation. The magnetic abrasive polishing method is not so common for machine that it is not spreaded widely. There are rarely researcher in this field because of non-effectiveness of magnetic abrasive. Therefore, in this paper deals with development of the magnetic abrasive using worthless mineral. In this development, abrasive grain WA and GC used to resin bond fabricated low temperature. And magnetic material was fabricated from the worthless mineral which were closed into 200 mesh grit type. The XRD analysis result show that only WA and GC abrasive and worthless mineral crystal peaks detected which explains resin bond was not any more chemical reaction. From SEM analysis it is found that WA and GC abrasive and worthless mineral were strong bonding with each other by bond.