• Journal of the Korean Geographical Society
• /
• v.38 no.4
• /
• pp.575-590
• /
• 2003

It was the landscape phase that social relations were extended by production of landscapes during the 16C～17C. Core lineage groups in study area had extended socio-spatial nexus through making of the landscape of ‘authority-ostentation’(권력-과시형 경관) and of ‘kindness-civilization’(시혜ㆍ교화형 경관). Therefore they could gain a result that their power and authority took root in community perfectly. In the case of the Kims of Kwangsan(광산김씨), the first landscape of ‘kindness-civilization’ was Jungheodang(the learning room Jungheo), and next it was built Yangsungdang(the learning room Yangsung), and Imlijung(the pavilion Imli). Through this landscape production, the consciousness of scholastic genealogy was born, and this genealogy consciousness could be deepened and extended in regional scale. One more important feature in this phase is the point that the Kims of Kwangsan in Yeonsan area and the Songs of Unjin(은진송씨) in Hoiduk area could unite socially by the landscape production of ‘kindness-civilization type’ becoming intermediation. And these social union, that is to say, it do connote enlargement of the territoriality. It tells that community of ‘regional’ scale was formed by of core lineage groups of ‘local’ uniting each other.

• Proceedings of the Korean Society of Fisheries Technology Conference
• /
• 2002.10a
• /
• pp.166-167
• /
• 2002

세끼투명도판에 의한 투명도의 측정은 무엇보다 취급이 간편하고 경제적이다. 투명도는 광량 및 광산란, 현탁물질, 수색 혹은 기초생물량 등이 복합적으로 반영되어 정해지는 것으로 알려져 있다(Buttenveld, 1995; Sanden and Hakanssen, 1996; Yajima, 1996). 투명도는 수질 측정항목에 거의 필수적으로 이용되고 있으나 자료가 정량적으로 분석되어 수질평가에 직접 이용된 사례는 비교적 적다. (중략)

• Proceedings of the KSEEG Conference
• /
• 2007.04a
• /
• pp.167-169
• /
• 2007

• The Science & Technology
• /
• v.30 no.2 s.333
• /
• pp.20-22
• /
• 1997

한국자원공학회는 해방후 광업관련 협회로 활동하다 62년 한국광산학회로 새로 창립한 후 89년 현재의 자원공학회로 학회명을 바꿔 연구활동을 계속하고 있다. 현재 정회원만 1천1백70명인 한국자원공학회는 매년 6회의 학술활동과 격월로 학회지를 발행하고 있으며 작년 7월에는 한ㆍ일 공동 암반공학심포지엄을 열기도 했다.

• Economic and Environmental Geology
• /
• v.43 no.3
• /
• pp.235-248
• /
• 2010

To construct the standard methods for evaluation of physicochemical characteristics of tailings in Korea, specific gravity, paste pH, grain size, mineral compositions and heavy metal concentrations of total 26 tailings from 21 metallic mines were analyzed. Specific gravity of tailings ranged from 2.61 to 4.31 (avg. 3.04), and sand and silt grain were dominant in the tailings. Ranges of paste pH were 2.1-9.5 in tailings (7.1-9.2 at magmatic, skarn and hydrothermal replacement deposits and 2.1-9.5 at hydrothermal vein deposits). Additionally, hydrothermal vein deposits could be reclassified into three categories: (1) paste pH>7.0, (2) 4.0

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2006.05a
• /
• pp.47-48
• /
• 2006

A roughness measuring system which comprises an integrating sphere and a stabilized laser has been fabricated with the aim of measuring the roughness correction value which is necessary in gauge block measurement by optical interferometry. To calibrate the system, a Newton's ring interferometer has been introduced. The method how to calibrate the roughness measurement system has been described.

• Resources Recycling
• /
• v.25 no.3
• /
• pp.3-10
• /
• 2016

The passive treatment was required a large area for the treatment of acid mine drainage (AMD), and pollutants were discharged with mine drainage by the increased flow rate in summer. This study was performed to improve the turbidity and to precipitate the pollutants quickly using coagulants and flocculants in AMD of abandoned mine sites that were difficult to build the passive treatment system. The coagulant PAC (Poly aluminium chloride) and flocculant PAM (Polyacrylamide) were selected to improve turbidity in W mine waters. We also tested the particle size analysis, ICP-OES and/or SEM-EDS for water and sludge samples.

• Journal of the Korean Society of Mineral and Energy Resources Engineers
• /
• v.55 no.6
• /
• pp.604-613
• /
• 2018

In this study, we analyzed the variations in the received signal strength index (RSSI) measured from Bluetooth beacons based on the strength and propagation direction of Bluetooth low energy (BLE) signal. Using a smartphone, we performed field experiments to investigate RSSI variations in the BLE signal transmitted by non-directional and directional beacons in an amethyst mine. In case of non-directional beacons, as the distance between the Bluetooth beacon and smartphone decreased, the RSSI increases, whereas as the BLE signal strength increased, the RSSI average gradually increased. The mean value of RSSI measured from the directional beacons was changed without relation to the facing angle between the Bluetooth beacon and smartphone. The results of this study can be used as basic data for developing a Bluetooth beacon-based proximity warning system for underground mines.

• Journal of Korean Society of Forest Science
• /
• v.111 no.2
• /
• pp.234-241
• /
• 2022

We performed this study to determine the foliar nutrient concentration and the nutrient stocks of restoration areas and adjacent Pinus densiflora S. et. Z. (red pine) stands in opencast kaolinite mines in Sancheong-gun, Gyeongsangnam-do, southern Korea. We chose six sites to determine foliage nutrient concentrations and the nutrient stocks of soils (0-10 cm depth). The dominant vegetation planted in restoration areas comprised Quercus acutissima Carruth., P. koraiensis S. et. Z., Festuca arundinacea Schreb., and Lespedeza cuneata G. Don. Invading vegetation in the restoration areas comprised Alnus incana (L.) Medik., Robinia pseudoacacia L., and Lespedeza spp., among others. The carbon and nitrogen stocks at 10 cm soil depth were significantly higher in the red pine stands than those in the restoration areas, whereas those of phosphorus, potassium, and magnesium were not significantly different between the two areas. However, calcium stocks were significantly higher in the restoration areas than in the red pine stands. Nitrogen concentration in foliage was higher in L. cuneata (20.28 mg N g^-1) than that in F. arundinacea (5.67 mg N g^-1), whereas potassium concentration was twice as high in F. arundinacea (18.8 mg K g^-1) as that in L. cuneata (9.07 mg K g^-1). Foliar nitrogen concentrations in invasive vegetation such as A. incana, R. pseudoacacia, and Lespedeza spp. were twice or four times higher than those of Q. acutissima and P. koraiensis. Our results indicate the development of suitable vegetation and soil amendment treatments to improve poor soil environmental conditions in restoration areas are necessary following opencast kaolinite mining.

• Journal of the KSME
• /
• v.35 no.11
• /
• pp.965-969
• /
• 1995

기계공업은 일반기계, 정밀기계, 수송기계, 전기기계, 조립금속제품으로 구성되는 광범위한 산업 이다. 그 중에서도 일반기계공업은 공작기계, 냉동공조기계, 건설\ulcorner광산기계, 섬유기계,식품가공 기계,제지기계 등의 생산설비를 말하며 대표적인 자본재산업이라고 할 수 있다. 일반기계는 생 산기반 설비로서 제조업의 성장발전과 구조 고도하에 기여하며 국가 경쟁력 기반을 구축하는 요소로서 단기간 내에 경쟁력 확보가 어려운 산업이다. 그러나 일정한 경쟁력만 갖추면 수출산 업화가 용이하고 후발계도국이 따라 오기 힘든 산업으로서 반드시 육성해야만 하는 산업이다. 우 리나라의 경우 기계공업 중에서도 일반기계를 제외한 다른 부문은 어느 정도 국제경제력을 확 보하고 있으므로 여기서는 향후 집중적 육성이 필요한 일반기계에 한정하여 현황과 발전방향을 서술하고자 한다.