• Korean Journal of Crystallography
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• v.7 no.2
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• pp.196-200
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• 1996

The transformation processes from unit cell data, Miller indices and atomic coordinates of non-standard space groups to the ones of the standard space groups in monoclinic system and the calculation processes of their standard deviations have been shown and computerized. The computer programs can be applied to all the seven crystal systems.

• The Korean Journal of Zoology
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• v.26 no.3
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• pp.171-179
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• 1983

Amounts of DNA single strand breaks and unscheduled DNA synthesis in CHO cells exposed to MMS were increased in the presence of 3-aminobenzamide, a potent inhibitor of poly (ADP-ribose) polymerase. However, those in cells irradiated with UV-light were decreased. These results suggest that poly (ADP-ribose) polymerase acts negatively on the MMS-induced base excision repair but positively on the UV-induced nucleotide excision repair. In the combined treatment with MMS and UV-light in the presence of this inhibitor, amounts of strand breaks were just the same as those in the absence of the inhibitor. But those of unscheduled DNA synthesis were increased up to the amount induced by UV-light alone. These results may suggest that poly (ADP-ribose) polymerase affects the incision step of excision repair induced by MMS and UV-light independently, and that it may potentiate the complete cleaving of UV-induced pyrimidine dimers possibly by the repair enzymes which might have been partially inactivated by MMS.

• Journal of the Mineralogical Society of Korea
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• v.25 no.4
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• pp.249-261
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• 2012

Phlogopite-bearing orthopyroxenite occurs in Andong ultramafic complex in a planar body of about 1 meter thick, and consists mostly of coarse subhedral to euhedral orthopyroxene crystals. Minor minerals are clinopyroxene, phlogopite, and plagioclase with trace chromian spinel, pentlandite, apatite, and zircon. Clinopyroxene occurs as either exolution lamella or interstitial fillings with phlogopite and plagioclase. Electron microprobe analysis showed that orthopyroxenes are entatite, while clinopyroxenes are diopside with little chemical variation through samples. Hydrous alteration resulted in the formation of talc, amphibole, and serpentine from orthopyroxene, clinopyroxene, and plagioclase, respectively. The orthopyroxenite was probably formed by the fractional crystallization of the ultramafic magma. Radiogenic dating of phlogopite and zircon of the orthopyroxenite would reveal the age of the Andong ultramafic complex.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.5 no.2
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• pp.37-46
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• 1987

The single photo method has a lot of applications in forestry, traffic accident managements, industry, criminal investigation, and in daily life. In this study a new single photo method was developed by classifying into the Space resection method and the 2 Dimensional Perspective Transformation method. Metric and nonmetric cameras were used to analyse the accuracy by means of single photo method, and the errors in coordinates and lengths were studied by changing the number and arrangement of control points to obtain the optimum condition for the single photo method. The influence of number and arrangement of control points on the accuracy was relatively small in case of the Metric WILD P31 and ASAHI PENTAX 6$\times$7 cameras, where as for errors it was a major factor in the Non-metric Nikon FM2. To overcome these defects, at least 6 control points should be used for the errors to be convergent and they should be distributed evenly over the surveying area. It was found that accuracy increased as the object to be photographed was placed in the perpendicular direction to the axis of camera.

• Journal of the Mineralogical Society of Korea
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• v.6 no.2
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• pp.145-155
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• 1993

Mineralogical, textural, and chemical changes of chlorite by weathering in anorthosite in the Sancheong district were stucdied using X-ray diffraction, scanning electron microscopy, and electron microprobe analysis. Chlorite in anorthosite corresponds to ferroan clinochlore with IIb structural type. It weatheres firstly to regularly mixed-layered chlorite/vermiculite(C/V) and then, to halloysite without the intermediate stage of vermiculite. Clinochlore packet cleaves and transforms to several thin packets of C/V, which subsequently change to halloysite developint fan-sharped structures by large volume increase. Direct halloysitization of C/V is attributed to the rapid weathering of anorthosite.

• Journal of the Mineralogical Society of Korea
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• v.2 no.2
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• pp.100-106
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• 1989

Die Titan-Augite sind die dominierenden Einsprenglings- und Grundmassephasen in allen tephritischen Gesteinen im Kaiserstuhl. Mg-Werte ($Mg/Mg+Fe^{2+}+Mn$) der Pyroxene schwanken von 60-85. Der FATS- und TITS-Anteil nimmt von phonolithischem Basanit und -Tephrit zum fraktionierten phonolithischen Tephrit hin ab. Die Kpx der einzelnen Gesteinsgruppen zeigen auch einen Fraktionier-ungstrend, der durch Abnahme von Si und Zunahme von Al vom phonolithischen Basanit und -Tephrit zum fraktionierten phonolithischen Tephrit gekennzeichnet ist. Der in Alkaligesteinen gewohnlich auftretende $gr{\ddot{u}}ne$ Kern der Px ist Fe-reicher und $Ti-{\ddot{a}}rmer$ als der $hellbra{\ddot{u}}nliche$-farblose Rand. Die $gr{\ddot{u}}nen$ Kerne weisen $gegen{\ddot{u}}ber$ den $hellbr{\ddot{a}}unlichen$ Randern $h{\ddot{o}}here$ $Na/Fe^{+3}$-Verhaltnisse auf.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.20 no.1
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• pp.13-19
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• 2002

In a different way of satellite image or aerial photo, the image acquired by terrestrial photogrammetry has to go through complicated management according to the desired precision and analysis range. In this study, digital surface model and ortho image for cultural asset, terrestrial structures, were made by reflectorless total station in order to increase the application of single photo, and that was analyzed and compared with the method using stereo image. Single photo is expected to be utilized as the measuring method for drawing cultural assets or examining the stability of slope in which high precision doesn't need by performing the various geometric and visual analysis using ortho image made by excluding the difficulties of acquisition and plotting of stereo image.

• Journal of the Mineralogical Society of Korea
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• v.27 no.3
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• pp.135-147
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• 2014

This study analyzed spectroscopic methods for characterization of skarn minerals and sphalerite occurring in Dangdu ore deposit, and effectiveness of portable spectrometer in skarn mineral resources exploration is discussed. The spectroscopic analyses identified clinopyroxene, garnet, epidote, calcite, chlorite and sphalerite where spectral curves of clinopyroxene, garnet, epidote, and sphalerite show single mineral spectral characteristics and those of chlorite are in a mixed form with calcite and clinopyroxene. The assessment of spectroscopic analyses based on XRD analysis and microscopic observation reveals that clinopyroxene, garnet, epidote correspond well with more than 80% of detection, but sphalerite, chlorite, and calcite showed below 50% of detection rate. It is expected that skarn deposit exploration using a portable spectrometer is more effective in detection of clinopyroxene, garnet, and epidote whereas spectroscopic data of sphalerite, chlorite, and calcite needs to be utilized as a supplementary data. For the effective detection of chlorite and calcite, their content in the samples needs to be sufficient.

• Proceedings of the Petrological Society of Korea Conference
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• 1999.06a
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• pp.64-67
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• 1999

• Proceedings of the Korean Fiber Society Conference
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• 1995.10a
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• pp.173-174
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• 1995