• Asian review of World Histories
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• v.1 no.1
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• pp.85-116
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• 2013

The theory of terrestrial impact which has been developed by the astronomy scientists since 1970s is employed for this article in a new angle that atmospheric conditions of our planet should be adopted in the interpretation of the history of mankind. Large and small terrestrial impacts must be acknowledged as key tasks in terms of the study of 'world history'. The Society of Interdisciplinary Studies has already advocated that the 'Bronze Age Civilization' was strongly influenced by the long term terrestrial impact phenomena. Based on historical materials from Korea, the present study was able to identify the years 680-880, 1100-1220, 1340-1420, and 1490-1760 as periods in which territorial impacts occurred.

• 보존과학연구
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• s.14
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• pp.45-76
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• 1993

Au-Cu alloyed coating layer were found by Hg-amalgam process and it seemed to be used Cu-amalgam process similar to Au-amalgam. Coated layer is dense and unique, Thickness of layer was 1.5 to $18.0\mum$ which had 95.3 to 99.8% purity of gold Matrix metal mostly cosists of forged copper alloy which had high purity and ferrite ($\alpha$) strusture. It showed excellent refining technical level at that time. Aowever, the nail, ferrous matrix used for strength needed, composed of silver foil packed and gold layer for adherence between ferrous matrix and gold layer

• Korean Journal of Crystallography
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• v.10 no.2
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• pp.110-113
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• 1999

x의 범위가 0.5

• Journal of architectural history
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• v.4 no.1
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• pp.29-42
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• 1995

This study aims at examinating the change of architectural technique in the residential district of Seoktanri(石灘里), and then extracting the restorable types from it. The constructive technique was advanced in the composition of walls and the use of footing. The arrangement of columns was developed to standing them in a row and three rows in the center of interior space. In the light of excavated relics and the position of furnace, the interior space is seperated into cooking-heating, working and storing space. By the difference of height and the slope, the floor is divided into two parts which are low and high. According to the arrangement of column-holes, the types of roofs to be restored are as follows; the gable roof without column-hole, the hipped roof with center-column-holes(中央柱孔) in a row and the gable roof with center-column-holes in three rows.

• The Research Journal of the Costume Culture
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• v.10 no.5
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• pp.485-492
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• 2002

The purpose of this study is to classify of the Cone shaped Pendants in old tombs of Three Kingdom States. These Cone shaped Pendants are made of bronze and coated with gold plate or Gold. Each Cone shaped Pendants consists of a Sehwhan(細環) type or Taewhan type, a median part in the form of a several joined small globe, or circular shape, and finally a cone-shared pendant. Cone shaped Pendants is 5 part(A-L A-b, B-1-a, B-1-b, B-2-b type) in according to the styles of the Sehwhan(細環) and Taewhan type and median ornament types. A-a, A-b, B-1-a, B-1-b type was general style that was found in most of the old tombs in Kokuryo, Pacjae, ancient Silla. B-2-b type was excavated from the only Kokuryo tombs.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.10 no.6
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• pp.89-94
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• 2011

The wear characteristics between nonmetal and metals have been investigated using a disc on disc system. The specimens of nonmetal are made by the nylon and teflon materials. The specimens of the metal are used as eight kinds of along their hardness. The kinds of metals are copper(Hv96), aluminum(Hv186), brass(Hv234), aluminum bronze(Hv294), stainless steel(Hv327), annealing mild steel(Hv345), mild steel(Hv372), Hard steel(Hv434). In this study, a upper and lower specimens have been used the same size and shape. Using experimental data we figured the relationship between friction coefficient of nonmetal and metals. We figured the relationship between friction temperature of nonmetal and metals. The result had been verified a wear characteristics of nonmetal and metals in the wear tests.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.13 no.6
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• pp.54-60
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• 2014

In industry, several casting process are widely used to manufacture complex and accurate blank part of hard materials such as aluminum, casting steels, bronze and magnesium alloys which are difficult to manufacture in a blank shape. Even if the casting process does not high accuracy superior surface characteristics other machining process, the casting process is widely used in manufacturing blank part. Furthermore, it is difficult to select appropriate casting process a part among several casting process. for effective selection different process, a careful decision given casting application is necessary. An appropriate casting for a given material and shape condition must be selected for novice engineers in industry. In this paper, an expert system based on an analytic network process(ANP) is suggested for best selection of casting considering a prior interdependency effect among various factors such as material, geometry, process capability, economy and equipment.

• Bulletin of the Korean Chemical Society
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• v.34 no.8
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• pp.2348-2352
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• 2013

We report a simple electrochemical approach in fabricating multiple colored molybdenum (Mo) oxide bronzes on the surface of a Mo-quartz electrode. A three step electrochemical batch process consisting of linear sweep voltammetry and anodic oxidation followed by cathodic reduction in neutral $K_2SO_4$ electrolyte at different end potentials, viz. -0.62, -0.80 and -1.60 V (vs. $Hg/HgSO_4$) yielded red, blue and yellow colored bronzes. The samples produced were analyzed by XRD, EDS, and SIMS. The color variation was suggested to be associated with the cations intercalation into the oxide formed and the simultaneous structural changes that occurred during the cathodic reduction in neutral aqueous medium.

• 보존과학연구
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• s.20
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• pp.81-90
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• 1999

We performed the non-destructive analysis of objects excavated at the Tomb of Mich’un-ri in Ch’ung-won. We analysed components using of Energy Dispersive X-Ray Micro-Fluorescence Analyzer. Glass bead inlaid with silver was classified as K2O-CaO-SiO2 type of glass. Purity of silver inlaid in the surface was verified above 97%.All small ear-ring were made by rolling up gold broad to a bronze wick. The composition ratio of Au : Ag has significantly higher 87 : 11 than bigear-ring. As a result of composition analysis of a welded part with big ear-ring, it contained the more Cu, Hg contents and the less Au, Ag contents than the surface of big ear-ring.

• Conservation Science in Museum
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• v.4
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• pp.17-21
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• 2003

We performed conservation treatment for the sarira reliquary from the pagoda of Hwangnyongsa temple site. The sarira reliquary is in the shape of gilt-bronze octagonal miniature pagoda. Through radiography, it was newly proved that a radial design exists on the roof part. The gilded layer was plated with amalgam. Each part was plated first before being put together. We restored the lost parts and made supports, and then assembled it in the following order: base, upper part of the base, shaft and roof part.