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A Study on the thought about a point on coordinates (좌표상의 점에 관한 사유에 대한 연구)

Youn, Ho-chang
- Proceedings of the Korea Contents Association Conference
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- 2013.05a
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- pp.367-368
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- 2013
고대부터 수의 존재론적 논의는 이어 왔으며 해석기하학의 발달로 수는 좌표상의 점으로 인식하게 되었다. 본 논문에서는 '좌표상의 수는 존재하는 것인가', '어떻게 인식하여야 하는가'에 대한 고찰과 함께 좌표 위의 점 즉 수를 인식하는 자와 좌표 상의 수에 대한 상호 작용을 통한 인식을 제안 하고자 한다.
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Acoustic Characterization of Three Seamounts Located in the Northwest of Marshall Islands, Western Pacific (서태평양 마샬제도 북서쪽에 위치한 세 해저산에 대한 음향상 연구)

Lee, Tae-Gook;Lee, Kie-Hwa;Moon, Jai-Woon;Jung, Mee-Sook;Kim, Hyun-Sub;Lee, Sang-Mook
- Journal of the Korean Geophysical Society
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- v.7 no.3
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- pp.193-206
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- 2004
Geophysical data including chirp (3 7 kHz) subbottom profile and detailed bathymetry were obtained over three seamounts in the Ogasawara Fracture Zone (OFZ) of the western Pacific, as a part of manganese crust survey onboard R/V Onnuri in 2003. The OFZ is a 150-km-wide, 600-km-long rift zone, which separates the East Mariana and Pigafetta Basin. The OFZ is unique in that it includes many seamounts (e.g., Magellan Seamounts andseamounts on the Dutton Ridge). The sub-seafloor acoustic echoes obtained near the OFZ were classified into following types on the basis of their characteristics: types I-1(pelagic sediment with parallel or subparallel reflectors), I-2 (pelagic sediment with no internal reflectors), and III-1 (reef build-up complex) on summit; types II-1 and III-2 (basement outcrop) on flank rift zone and upper slope, respectively; type III-3 (slump) on the lower slope and embayment between the flank rift zones; types II-2 (debrite) on the base of slope and basin floor; and types II-3 (turbidite or pelagic sediment) and II-4 (turbidite) on the basin floor. The mass-wasting that produced the complex of type II-2 debrite and III-3 slump on the lower slope and basin may have been caused by (1) strong tensional stress in the OFZ which may cause the numerous fissures or basement faults and (2) complex of the faults on the summit and steep upper slope. The variations in the echo type of pelagic sediment in the summit of seamounts may be related with the changes in the depositional and/or erosional environments. Type I-2 pelagic sediment, which is characterized by a thin and intermittent coverage, was probably deposited at a sheltered area when the current was strong, whereas type I-1 pelagic deposit occurred during a stage of progressive sedimentation.
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