• Title/Summary/Keyword: Chronology

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인구 역 추정에 의한 시조의 연대를 추정하는 수리적 방법

  • 유동선;구자흥;이성철
    • 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.

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Species Identification and Tree-Ring Dating of the Lotus Pedestal of Amitabha Statue at Ssangbong-Temple in Hwasun, Korea (화순 쌍봉사 극락전 아미타불 연화좌대의 수종 및 연륜연대 분석)

  • Kim, Yo-Jung;Son, Byung-Hwa;Oh, Jung-Ae;Jo, Tae-Gun;Choi, Sun-Il;Park, Won-Kyu
    • 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.

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Autonomous vision-based damage chronology for spatiotemporal condition assessment of civil infrastructure using unmanned aerial vehicle

  • Mondal, Tarutal Ghosh;Jahanshahi, Mohammad R.
    • 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.

중국구석기연구적진전여문제

  • Huang Wei-wen
    • 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

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The analysis of the image style expressed in men's fashion collection - focusing on Paris' collection from 2001 S/S to 2010 F/W - (남성복 컬렉션에 표현된 이미지 스타일 분석 - 2001년 S/S ~ 2010년 F/W 파리컬렉션을 중심으로 -)

  • Kim, Hyun-Jin;Lee, Eun-Suk
    • 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.

Species and Macroscopic Analysis of Log Piles Used for the ex-Government General of Chosun Building (구 조선총독부 청사 (구 중앙청) 기초말뚝 통나무의 수종과 재질)

  • Park, Won-Kyu;Kim, Yo-Jung
    • 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.

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Analysis and Tree-Ring Dating of Wooden Coffins Excavated from Incheon Sipjeong-Dong Site (인천 십정동 유적 내 출토 목관의 연륜연대 및 재질분석)

  • LEE, Kwang Hee;LEE, Ui Cheon;KANG, Pyung Won;KIM, Soo Chul
    • 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.

Investigation of Death Years and Inter-annual Growth Reduction of Korean Firs (Abies Koreana) at Yeongsil in Mt. Halla (한라산 영실지역 구상나무 고사연도와 시계열적 생육쇠퇴도 조사)

  • Seo, Jeong-Woo;Kim, Yo-Jung;Choi, En-Bi;Park, Jun-Hui;Kim, Jae-Hoon
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.22 no.3
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    • pp.1-14
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    • 2019
  • With a view to developing a database of death years of Korean firs (Abies koreana) at Yeongsil in Mt. Halla and investigating their abrupt inter-annual growth reduction tree-ring analysis was employed. To this end, 10 living trees (YSL) were selected to establish a master chronology and 20 dead trees were used to date their dead years. To investigate the difference in death years by death types, 10 trees, which remained standing (YSSD) out of the 20 dead trees were selected. The rest 10 dead trees were already fallen (YSFD). Two increment cores per tree at breast height were extracted in contour direction using an increment borer. A 106-year master chronology (1911-2016) was successfully established from the 10 YSLs. Through cross-dating between individual YSSD time series and the master chronology, it was verified that 1 YSSD was dead in summer 1978, 1 YSSD between autumn 1999 and spring 2000, 2 YSSDs in summer 2007, 1 YSSD in summer 2010, 1 YSSD in summer 2012, and 1 YSSD in summer 2013. The youngest tree rings of 2 YSSDs having no bark were in 1977 and 2002. For the YSFDs, it was verified that 1 YSFD was dead between autumn 1997 and spring 1998, 1 YSFD between autumn 2001 and spring 2002, 2 YSFDs between autumn 2009 and spring 2010, 1 YSFD in summer 2010, and 2 YSFDs between autumn 2012 and spring 2013, while the youngest tree rings of 2 YSFDs having no bark were in 1989 and 2004. To note, the death years of two trees, one from each death type (YSSD and YSFD), could not be verified due to poor cross-dating with the master chronology. The inter-annual growth reductions of YSSD and YSFD occurred more frequently and intensively than YSL. Typically, the YSFD showed the most frequent and intensive inter-annual growth reduction. On comparing the inter-annual growth reductions with the corresponding records of typhoons however we could not find any reliable relationship. Finally, from prior reports and results of the current study it can be concluded that the death and abrupt growth reduction of korean fir at Yeongsil in Mt. Halla are not caused by only a certain environmental factor but various factors.