• Title/Summary/Keyword: paper conservation

Search Result 1,159, Processing Time 0.024 seconds

Reconsideration of the Athens Charter(1931) (아테네 헌장(1931)의 재고)

  • Choi, Byung-Ha
    • Journal of architectural history
    • /
    • v.21 no.4
    • /
    • pp.25-36
    • /
    • 2012
  • This paper is to review the conclusions of the Athens conference that has so far contributed to the conservation world. It is normally called the conclusions of the Athens conference as the Athens charter. But the conclusions of the Athens are not as same as the Athens Charter regarding the contents. The former had more valuable contents than the latter regarding historic monuments. And the report of the Athens conference including 56 articles and 500 pages with 55 photos was published in 1933 by the International Museums Office. But little attention has been given to the report of the Athens conference. Therefore the point I want to make is to review to the report in order to understand the agenda of the conference and to examine the Anastylosis in Acropolis. In conclusion, these agendas and the articles in the report show us that the conference was sort of milestone with some advanced modern philosophical and technical concepts about conservation and restoration of historic monuments. Also when the term of anastylosis turns to reconstruction in archaeological sites, we are going to face with the problems of authenticity.

A New Constraint Handling Method for Economic Dispatch

  • Li, Xueping;Xiao, Canwei;Lu, Zhigang
    • Journal of Electrical Engineering and Technology
    • /
    • v.13 no.3
    • /
    • pp.1099-1109
    • /
    • 2018
  • For practical consideration, economic dispatch (ED) problems in power system have non-smooth cost functions with equality and inequality constraints that makes the problems complex constrained nonlinear optimization problems. This paper proposes a new constraint handling method for equality and inequality constraints which is employed to solve ED problems, where the incremental rate is employed to enhance the modification process. In order to prove the applicability of the proposed method, the study cases are tested based on the classical particle swarm optimization (PSO) and differential evolution (DE) algorithm. The proposed method is evaluated for ED problems using six different test systems: 6-, 15-, 20-, 38-, 110- and 140-generators system. Simulation results show that it can always find the satisfactory solutions while satisfying the constraints.

NUMERICAL COUPLING OF TWO SCALAR CONSERVATION LAWS BY A RKDG METHOD

  • OKHOVATI, NASRIN;IZADI, MOHAMMAD
    • Journal of the Korean Society for Industrial and Applied Mathematics
    • /
    • v.23 no.3
    • /
    • pp.211-236
    • /
    • 2019
  • This paper is devoted to the study and investigation of the Runge-Kutta discontinuous Galerkin method for a system of differential equations consisting of two hyperbolic conservation laws. The numerical coupling flux which is used at a given interface (x = 0) is the upwind flux. Moreover, in the linear case, we derive optimal convergence rates in the $L_2$-norm, showing an error estimate of order ${\mathcal{O}}(h^{k+1})$ in domains where the exact solution is smooth; here h is the mesh width and k is the degree of the (orthogonal Legendre) polynomial functions spanning the finite element subspace. The underlying temporal discretization scheme in time is the third-order total variation diminishing Runge-Kutta scheme. We justify the advantages of the Runge-Kutta discontinuous Galerkin method in a series of numerical examples.

Conservation of The Human Shaped Terra Cotta Mask Excavated from Jungcheon-ri, Jinju (진주 중천리 출토 인두형토기(人頭形土器)의 보존)

  • Lee, Hyunkyoung;Choi, Hyunwook;Lee, Seungli;Gwak, Hongin
    • Conservation Science in Museum
    • /
    • v.14
    • /
    • pp.23-28
    • /
    • 2013
  • This paper aimed to show the whole conservation process of the human shaped terra cotta mask that was excavated from one of construction sites at Jungcheon-ri, Geumsan-myeon, Jinju. This mask was X-rayed to get the correct making techniques and there are 4 holes on the top of the head and each diameter of the 3 holes is exact and the other hole is different from the three. The long and sharp shape of the nose is in trapezoid which was separately made with clay and put on (the face). It's found that there are round grooves each around upper and down lips. (upper in length: 10mm, down in length: 6 mm). All restoring materials and adhesives used for restoration to associate each piece are reversibility materials. According to a few points on buried bones of animals distributed around the sites, holes and grooves on the top of the head, ears and teeth to wear something, it academically presumes that this mask could be possibly used for the group ritual. Especially, the whole procedure from excavation to scientific conservation process resulted to have a special exhibition to give the public new eyes how the exhibition realizes to the public.

Mortar Characteristics for Reinforcement of Ancient Tomb Murals Using Oyster Shells

  • Lee, Hwa Soo;Yu, Yeong Gyeong;Han, Kyeong Soon
    • Journal of Conservation Science
    • /
    • v.34 no.4
    • /
    • pp.295-303
    • /
    • 2018
  • The application of reinforcing agents with hydraulic property and strength development characteristics was studied under conditions similar to those of mural-painting mortar made with oyster shell powder. Reinforcement mortar made with oyster shell powder showed hydraulic properties and strength to supplement the weaknesses of natural hydraulic lime(NHL); this confirmed its possibility as a wall-reinforcing material with enough strength for preserving mural paintings. Reinforcement mortar 1 showed hydraulic property and general characteristics of lime mortar, such as consistency and viscosity, as well as lower strength and higher whiteness compared to an NHL product. For Reinforcement mortar 2, the original wall sample characteristics were reflected by mixing more shell produced through calcination; and it showed similar strength to that of Reinforcement mortar 1 as well as high whiteness. In measuring the contraction ratio of reinforcement mortar samples, Reinforcement mortar 1 and 2 showed more stability in property change compared to the NHL Group.

Conservation of Biodiversity and Its Ecological Importance of Korean Paddy Field

  • Cho, Young-Son;Lee, Dong-Kyu;Choe, Zhin-Ryong;Han, Min-Soo;Pellerin, Kristie
    • KOREAN JOURNAL OF CROP SCIENCE
    • /
    • v.51 no.6
    • /
    • pp.497-504
    • /
    • 2006
  • Biodiversity is closely related to the conservation of ecosystems. Ecosystems provide more subtle, but equally essential, services. Microorganisms decompose human's waste and renew the soils that produce our food crops. Biodiversity in Korean paddies encompass 54 families and 107 species of freshwater invertebrates. In terms of the number of aquatic insects affected by different sources, the order starting with the highest population was swine slurry > chemical fertilizer > fresh straw with reduced fertilizers > control. The number of freshwater invertebrate and aquatic macro-invertebrate in surface water of the plots without insecticidal application were 2 and 2.1 times greater than in fields receiving insecticide applications, respectively. The soil microfungal flora of the 85 isolates paddy fields in Korea was 30 species in 13 genera and 11 isolates were unidentified yet. Agricultural policy should be changed to assist the conservation of biodiversity because until now the agricultural ecosystems have been negatively affected from the development of high-yield varieties to enhance food production, and the expansion of fertilizer and chemical use. For the conservation of agricultural ecosystems, agricultural practices with less investment and more resource saving, as well as enhancing the safety of agricultural and livestock products are essential. Finally, this paper was written for the contribution for the development of environmentally friendly farming systems with neighboring or whole ecosystems.

A Study on the Management Planning for the Conservation and Environmentally Friendly Use of Korean Coastal Wetlands (우리 나라 연안습지의 보전과 환경친화적 관리방안에 관한 연구)

  • Park, Tae-Yoon
    • Journal of the Korean Society of Environmental Restoration Technology
    • /
    • v.2 no.3
    • /
    • pp.64-73
    • /
    • 1999
  • The purpose of this study is to establish the management plannings for the conservation and environmentally friendly use of Korean coastal wetlands. The function, economic value, and the necessity for the conservation of coastal wetlands are described. The current management status, Korean Governmental policies for the use of coastal wetlands, and their problems are surveyed and analysed. The management plannings for the environmentally friendly use of Korean coastal wetlands is suggested as follows: (1) The coastal wetlands need to be divided into 3 different regions based on PSR(Pressure, State, Response) of OECD. (2) Each region should be managed by appropriate management plans which are suggested in Chapter IV of this paper. Finally, in order to realize these management plannings the change of Governmental system and laws are suggested as follows: (1) The change of relevant laws is required. Additionally, each region should managed by proper governmental agencies. (2) The EIA(Environmental Impact Assessment) system should be improved. (3) The participation of regional people should be guaranteed in the decision making processes of the business and other important planning regarding coastal wetlands. (4) The system which primed the ecological value of coastal wetlands should be established.

  • PDF

Analysis on the Components of Brown Spot occurred in the Papers (지류에 발생하는 얼룩반점의 성분분석에 관하여)

  • Park, Seh-Youn;Lee, Kyu-Shik;Han, Sung-Hee;Ahn, Hee-Kyun
    • 보존과학연구
    • /
    • s.13
    • /
    • pp.81-95
    • /
    • 1992
  • The old books which have been colored to brown spots were analyzed chemically to compare with white part. The original raw materials were paper mulberry (Broussonetia Kazine) and woodpulp. White part contained58.8%($\alpha$-37.2%,$\beta$-8.6%, $\gamma$-12.7%)cellulose, 21.7% hemicellulose, 19.8% lignin,4.4% pentosan and brown sopt part contained 49.1%($\alpha$-19.8%, $\beta$-14.5%,$\gamma$-14.8%) cellulose, 27.1% hemicellulose, 23.8% lignin, 4.8% pentosan. Both of brown spot and white parts contained starch without protein. The pH was 4.9 in brown and 5.0 in white part respecitively. The brown spot parts were more solidified than white parts according to SEM observation. Difference of organiccompinent in brown part came from white part were 2-hydroxy-benzaldehydeand phenol.

  • PDF

Development of Natural Dyed Korean Traditional Paper for Cultural Properties Conservation and Storage (Part 2) - Antifungal, Insect Repellent Activities and Stability on Metals - (문화재 보존·보관용 천연염색지 개발(제2보) - 천연염색지의 기능성 연구 -)

  • Lee, Sang-Hyun;Yoo, Seung-Il;Choi, Tae-Ho
    • Journal of Korea Technical Association of The Pulp and Paper Industry
    • /
    • v.48 no.3
    • /
    • pp.80-90
    • /
    • 2016
  • The purpose of this study was to investigate the functional properties of natural dyed Hanji for cultural properties conservation and storage. To estimate functional properties of Hanji, antimicrobial, insect repellent test, and Oddy test were executed. Hanji dyed with 10% Golden thread (Coptis chinensis), a natural dye and silver nitrate mordanting showed the most excellent antifungal activities against A. niger, P. chrysogenum, and Trichoderma sp. before and after aging. The insects repellent test followed didn't indicate significant effects on treated Hanji against Lasioderma serricorne, Sitophilus zeamais, and Tribolium castaneum. According to Oddy test result, Hanji dyed with Golden thread and silver nitrate caused no significant corrosions on copper, silver, and lead after aging 28 days.

The Effects of Anoxic Treatments on Color and Mechanical Property in Fabrics, Natural Dyed Fabrics, Papers, Natural Dyed Papers and Paints (저산소 농도 살충처리가 직물, 염색 직물, 종이, 염색지 및 채색편의 색상 및 기계적 성질에 미치는 영향)

  • Oh, Joon Suk;Choi, Jung Eun;Noh, Soo Jung;Eum, Sang Wook
    • Journal of Conservation Science
    • /
    • v.30 no.2
    • /
    • pp.219-234
    • /
    • 2014
  • Fabrics, natural dyed fabrics, papers, natural dyed papers and paints were examined effects of colors and mechanical properties for materials of museum collections under anoxic treatment. Anoxic conditions using nitrogen and argon were oxygen concentration 0.01%, temperature($20^{\circ}C$, $25^{\circ}C$, $30^{\circ}C$), 50% RH and exposure time 30 days. Examined fabrics were raw silk fabric, UV irradiated raw silk fabric, degummed silk fabric, UV irradiated degummed silk fabric, cotton fabric, and UV irradiated cotton fabric. Natural dyed silk and cotton fabrics were dyed with fresh indigo, indigo, safflower, gromwell, madder sappanwood, amur cork tree, turmeric, gardenia, barberry root, pagoda tree flower, cochineal, lac, alnus japonica, gallnut, chestnut shell, and combination(indigo and safflower, indigo and amur cork tree, indigo and pagoda tree flower, indigo and sappanwood). Papers were Korean papers(mulberry paper, mulberry(70%) and rice straw(30%) mixed paper), Japanese paper(gampi paper), cotton paper, refined linen paper, cotton, linen & manila mixed fibre furnish, copy paper, news print, and alum sized mulberry paper. Natural dyed papers were dyed with indigo, sappanwood, madder, safflower, gardenia, amur cork tree, and pagoda tree flower. Paints were painted on alum-sized papers and silk fabrics using glue and pigments(azurite, malachite, cinnabar, vermilion, orpiment, gamboge, red lead, haematite, iron oxide red, indigo(lake), lac, cochineal, safflower, madder root lake, celadonite, smalt, ultramarine blue, lapis lazuli, prussian blue, kaolin, lead white, oyster-shell white, and clam-shell white). The color differences(${\Delta}E^*$) of all examined materials were below 1.5 or lowered than control samples after anoxic treatment. The variations of tenacity of yarns of fabrics and natural dyed fabrics after anoxic treatment were within that of standard silk and cotton fabrics. Gases(nitrogen and argon) and temperatures of anoxic treatment did not also affected color differences and variations of tenacity of materials.