• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.395-395
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• 2023

전 세계 곳곳에서 매년 발생하고 있는 홍수, 가뭄, 수질 문제는 인류가 해결해야 할 공통적인 문제이다. 홍수, 가뭄, 수질 문제뿐만 아니라 수자원의 지역적인 불균형과 인근 지역의 물 분배 문제, 공유하천 문제 등으로 인한 물 사용자 간의 물 갈등, 물 분쟁도 지속되고 있다. 최근 정보통신기술이 발달함에 따라 수자원 관련 각종 위험지표, 물 갈등, 물 분쟁 사례를 자료화하여 활용할 수 있는 온라인 플랫폼이 개발되고 있다. Aqueduct 3.0은 전 세계 물 위험을 식별하고 평가할 수 있는 물 위험평가 프로그램(water risk assessment tool)으로 세계 수자원 협회에서 2019년 기존 프로그램을 업데이트하여, 온라인 플랫폼을 통해 전 세계 각국의 지역별 수자원 분포에 따른 각종 위험지도와 데이터를 무료로 제공하고 있다. 또한 세계 자연기금(World Wide Fund For Nature)도 온라인 플랫폼으로 전 세계의 물 위험 필터도구(water risk filter tool)를 제공하고 있다. 또한 물 갈등 연대기(Water Conflict Chronology)는 태평양 협회에서 전 세계 물갈등 사례를 수집하여 연대별로 정리한 것으로, 업데이트되어 2022년 사례까지 제공하고 있다. 본 연구는 Aqueduct와 Water Conflict Chronology 등 온라인 플랫폼에 탑재된 한반도 관련 수자원 자료를 조사하여 기존 자료와 분석하였다. 연구 결과 Aqueduct와 Water Conflict Chronology 등 온라인 플랫폼이 수자원 관련 교육의 유용한 도구임을 알 수 있었다.

• Journal for History of Mathematics
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• v.17 no.1
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• pp.97-108
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• 2004

There are so many methods in population estimation such as logistic estimation and compound interest estimation. If we have some pieces of information about population of one tribe, we can estimate progenitor chronology of that tribe used by inverse estimation. In this paper, we describe several theory of population estimation, and develop mathematical method for estimation progenitor chronology from prior general data and statistical estimation theory. Several examples are illustrated.

• Journal of the Korea Furniture Society
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• v.23 no.1
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• pp.95-102
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• 2012

The objective of this study was to conduct the species identification and tree-ring dating of Lotus Pedestal of the Amitabha Statue at Ssangbong-Temple in Hwasun. The six wood blocks used for the Lotus Pedestal were hard pines (Pinus spp.; diploxilon) except one piece which was ginkgo (Ginkgo biloba L.). The lotus leaves surrounding the pedestal body were also made of ginkgo. Tree-ring patterns of 3 blocks were synchronized and a 133 years chronology was made. The chronology was crossdated well with the master chronology of Japanese red pine in South Korea. It dated back to A. D. 1551~1683, i.e. the last ring dated A. D. 1683. Through the estimation of the number of sapwood rings removed during carving, the felling year was calculated A. D. $1704{\pm}10$. The calligraphic writing on the Pedestal indicated that this statue was made in A. D. 1694. Therefore, the accuracy of the tree-ring dating has been proven.

• Smart Structures and Systems
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• v.25 no.6
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• pp.733-749
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• 2020

This study presents a computer vision-based approach for representing time evolution of structural damages leveraging a database of inspection images. Spatially incoherent but temporally sorted archival images captured by robotic cameras are exploited to represent the damage evolution over a long period of time. An access to a sequence of time-stamped inspection data recording the damage growth dynamics is premised to this end. Identification of a structural defect in the most recent inspection data set triggers an exhaustive search into the images collected during the previous inspections looking for correspondences based on spatial proximity. This is followed by a view synthesis from multiple candidate images resulting in a single reconstruction for each inspection round. Cracks on concrete surface are used as a case study to demonstrate the feasibility of this approach. Once the chronology is established, the damage severity is quantified at various levels of time scale documenting its progression through time. The proposed scheme enables the prediction of damage severity at a future point in time providing a scope for preemptive measures against imminent structural failure. On the whole, it is believed that the present study will immensely benefit the structural inspectors by introducing the time dimension into the autonomous condition assessment pipeline.

• Proceedings of the KSEEG Conference
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• 2000.04b
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• pp.314-316
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• 2000

• Bulletin of the Korean Space Science Society
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• 2001.11a
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• pp.39-39
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• 2001

• KOMUNHWA
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• no.50
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• pp.297-315
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• 1997

Chronology, Paleolithic typology and ecology in Pleistocene East and Southeast Asia have been a constant source of debate and controversy. However, recent significant advances in the fields above-mentioned have improved this condition greatly. The 'ultima

• Journal of the Korea Fashion and Costume Design Association
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• v.20 no.1
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• pp.167-181
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• 2018

In modern society, men are selecting dress based on physical features as well as individual taste. Through this concern with appearance, new descriptive words have appeared from time to time. Therefore this study aimed to analyze the type of image style expressed in the Paris Men's Fashion Collection during the period of 2001 S/S collections~2010 F/W collections. This study used Frequency and Chi-square tests through SPSS 12.0 program for the analysis of a total of the 1,357 materials shown from nine designers. The results were as follows. As a result of examining the image style according to chronology and season by frequency and the tendency of design works by chi-square test, in the tendency of the image style by chronology, the style emphasizing a sexy and manly appearance is preferred through the tendency that Homme Fataleism has been continually released in foreign men's fashion collections for about ten years. In the tendency of the image style by season, the image style of the Homme Fataleism was highly published in SS and FW season except for SS in 2004 and 2008. In the tendency of design works by chronology and season, the H-silhouette was highly preferred for about a decade. In color, the light brown group was frequently used until 2008 while gray has mainly been of use since 2009.

• Journal of Conservation Science
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• v.9 no.1
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• pp.48-52
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• 2000

A hundred wooden foundation piles were found underground during reconstruction for Heungreamun after removing ex-Chosunchongdokbu (ex-Government General of Chosun) building, which was built in 1916, at Kyungbok Palace in Seoul. It is known that larch piles had been collected from the Yaru area near Mt. Baekdu (Changbai). in North Korea. We examined 15 piles for identification of the species and their tree-ring structure. The species is identified as Larix gmelini by microscopic observation. Average diameter of the piles was 27 cm and average age 103 years. We obtained 151 year tree-ring chronology. However, we could not date the exact cutting years because there was no reference chronology yet. When we can obtain chronologies from living trees near the Yaru area, we could make a absolute and longer chronology for studying past history and environments around Mt. Baekdu.

• Journal of the Korean Wood Science and Technology
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• v.49 no.1
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• pp.67-81
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• 2021

This study aimed to conduct tree-ring dating and analysis of the materials used for the wooden coffins excavated from the ruins of Sipjeong-dong, Incheon. The tree species for the 10 wooden coffin materials was identified as pine. For accurate tree-ring measurement, the cross section was polished using sandpaper. The annual ring width was measured with an accuracy of 0.01 mm. Since the five materials were consistent with each other in dendrochronology, a representative annual ring chronology of 83 years was prepared. The prepared representative annual ring chronology was compared with the standard annual ring chronology, and the outermost ring of the wooden coffin was confirmed to correspond to the year 1575, suggesting that the wooden coffin was produced in the late 16th century. In addition, microscopic observation and FT-IR analysis revealed that the fibers attached to the surface of the wooden coffin were fibroin (Silk), and infrared spectroscopy (FT-IR) and Py-GC/MS analysis showed that the paint left on the surface of the wooden coffin was lacquer.