• 펄프종이기술
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• 제29권3호
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• pp.82-86
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• 1997

At Present, high-quality paper finishes are obtained by the exclusive un of supercalenders and softcalenders. Experience has shown that both calendering processes will not always k able to meet future requirements of increased efficiency combined with improved paper finish. The answer to these challenges is the development of a new technology, a synergy of supercalender and soft-calender called the “Janus concept”. This paper outlines the rationale behind this new development as well in the technical characteristics providing for the successful online integration irrespective of production speed. Laboratory results are included ta demonstrate that the Janus Concept enables a high-quality SC finish even at PM or CM speeds.

• 한국문화재보존과학회:학술대회논문집
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• 한국문화재보존과학회 2005년도 제22회 학술대회 발표 논문집
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• pp.300-305
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• 2005

Tree-ring chronologies can be used to date historical buildings and furniture by matching them with the chronologies of living trees or previously dated samples. Tree-ring dating gives a calender year to each tree ring and produces the felling dates of logs or woods which had been used for buildings. In Korea, several chronologies of Japanese red pine(Pinus densiflora Sieb. et Zucc.,'sonamu' in Korean), a major species for the wooden building materials, have been developed and used for dating historical buildings. Daejojeon of Changduck Palace is known to be reconstructed in A.D. 1920 after burned-out in A.D. 1917. Instead of new woods, Daejojeon was reconstructed by reusing the woods of Kyotaejeon in Kyungbok Palace. We sampled total of 26 wood samples which were replaced during the repair process of Daejojeon in 1995. Felling dates of the samples were determined by the dendrochronological crossdating method. Crossdating method employs graphic comparison of the master patterns (ring-width plots of living trees or known dates) with those of the sample chronologies of unknown dates. The cutting dates of Daejojeon woods were divided in two groups. One was the late 1860s and the other 1880s. The results confirmed that Kyotaejeon was reconstruced first in the A.D 1860s and then in late 1880s after burning out in 1876.

• The Korean Journal of Ecology
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• 제8권1호
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• pp.39-48
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• 1985

The airborne pollens were investigated by Durhan's pollen trap in Mt. Kwanak from March 1, 1984 to February 28, 1985. The observed airborn pollens were identified 22 families and 49 genera, which were divided into 27 tree pollens. Most airborne pollens were found from late-March to late-September and a few from early-November to late-February, 1985. The first observed pollen of the year was Alnus on March 5 and the last was Artemisia on Decomber 19, 1984. The maximum amount of daily airborne pollens was 823 grains/cm2 on May 16. Peak day and the maximum amount of major airborne pollens were as follows; 166 grains/cm2/day of Alnus pollen on April 4, 38 gr. of Populus on April. 13, 22 gr. of Quercus on May 10, 791 gr. of Pinus on May 26, 139 gr. on May 26 and 104 gr. of Graminae on September 6, 24 gr. of Ambrosia on Sep. 10 and 236 gr. on May 26 and 104 gr. of Graminae on September 6, 24 gr. of Ambrosia airborne pollen for one year was 12,733 grains/cm2 which were composed of 61% tree pollens and 39% herb ones. Decreasing order of pollen counts was Pinus, Alnus, Quercus and Populus in trees, and Graiminae, Artemisia and Ambrosia in herbs. Most of the airborn pollens were deposited in the day-time and a few at night, the maximum at 2∼4p.m.and the mininum at 8∼10 p.m.

• 한국식생활문화학회지
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• 제1권4호
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• pp.361-370
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• 1986

A review was made about the foods for korean festival days through such literature as kyongdojapji ( 京都雜誌 ), youlyangsesiki ( 洌陽歲時記 ) and Dongkooksesiki ( 東國歲時記 ). The focus was on the 'gala foods' in Kangweon province. A survey was made on two separate areas; urban and rural district, The result showed that there was no difference in celebrating gala days between two separate area. Those festival days which are celebrating are seolnal (New Year's day) (98.5%), chusok (mid-autumn festival) (97.7%), Sangwonnal (the 15th day of January) (95.1%), and dongjee (one of 24 seasons by lunar calender) (83.1%) in the order of higher percentages. Only less than 10% of the subjects for this survey are keeping on celebrating napyong (3.5%), baikjong (the 15th day of July) (5.4%), jungyang (the 9th days of September) (6.7%) samjinnal (8.6%) and yoodooil (the 15th day of June) (9.2%). Gala foods, such as dduggook, mandoogook, injulmi (glutinous rice cake) and sikhe (sweet rice beverage) on Seolnal, ogokbab (the rice made of five kinds of cereals), jinchas (various kinds of boiled vegetables) and buryum (chestnut, pinenut and walnut) on sangwonnal, songpyun (rice cake of chusok) on chusok, patjook (rice-gruel mixed with red beans) on dongjii were being enjoyed by most people. Gala foods on seolnal and chusok had a greater variety, compared with those enjoyed on other festival days. I think it is a pity that other gala foods except those just mentioned are enjoyed in a lower percentage or almost forgotten.

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 1999년도 춘계학술발표논문집
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• pp.1-6
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• 1999

A study was made to determine the effect of plastic pigment on the coating structure and printability of coated paper. Three basic plastic pigments were investigated such as solid-bead type of plastic pigment, binder type of plastic pigment and hollow type of plastic pigment. In the systems investigated, it was observed that particle shape and structure of plastic pigment had influenced on the rheology of coating color, the state of packing, and the properties of coated paper. The materials investigated were restricted to plastic pigments commonly uesd in paper coating formualtion. Inorganic pigments used in this research were kaolin clay which is platelets and calcium carbonate which is rhombic. Three kinds of plastic pigments were blended in the color made up with two inorganic pigments, respectively. The combination of pigments were carried out (1) to determined the effect of paticle structure of plastic pigment on the state of dispersion of coating color, (2) to observe the effect of temperature of calender on the property of coated paper prepared with plastic pigment. The data indicated that binder and hollow type of plastic pigment had the best results on improving the properties of coated paper such as paper gloss, opacity and air permeability ect. and solid-bead type of plastic pigment in the next place.

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2001년도 추계학술발표논문집
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• pp.128-128
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• 2001

제지기술의 변화속도가 빨라지고 제품의 고품질화가 요구가 많아지면서 finishing 공정 에 대한 관심과 중요성이 점점 더 높아지고 있다. 소비자의 요구에 부합되는 제품의 품 질을 얻기 위해서 여러 가지 방법들이 개발되고 있으며, 그 중에서 calender 설비 및 처리 기술이 계속적으로 발전하고 있는 추세이다. 특히 coated paper 제조 공정에서의 s supercalender 처 리 기 술은 매 우 중요하다. F Finishing 공정은 종이의 품질을 결정하는 제지 공정의 마지막 단계로서 calendering 처리 방법에 따라 제품의 품질을 크게 변화시킬 수 있다. 따라서 본 연구에서는 기존의 s supercalendering 처리 조건을 변경시켜 도공지의 품질 특성을 관찰하였으며 실험실용 s supercalender와 현장 적용을 통하여 supercalender 처리 조건이 도공지 품질에 미치는 영향에 대하여 검토하고 이를 이용하여 제품 품질을 개선시키기 위해서 수행하였다. 안료 배합비를 달리하여 다양한 온도와 압력 조건을 적용하여 보았으며 동일한 백지광 택을 갖는 여러 조건들에 대해서 각각의 품질 특성을 살펴보았다. 동일 백지광택에서 온도가 높을수록 macro-roughness, micro-roughness는 더 우수하게 나타났으며 이는 printability의 차이로 이어 졌다. 실험실용 supercalender를 이용한 실험에서 경도가 다른 두 가지 탄성롤로 cotton roll 과 polymer roll을 사용하였으며 통일한 온도와 압력 조건에서 calendering 특성은 서 로 다르게 나타났다. Calendering 조건이 가혹할수록 두 roll간의 특성은 더욱 두드러지 게 나타났으며 macro-roughness 보다는 micro-roughness에서 차이가 더 큰 것으로 확인되었다. 이러한 두 roll간의 특성 차이로 인하여 실제 인쇄 결과는 다르게 나타날 것으로 예상된다.

• Journal of the Korean Wood Science and Technology
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• 제34권6호
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• pp.12-20
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• 2006

전주 마전 유적에서 출토된 회곽묘 1기에 사용된 목재의 수종 식별과 연륜연대 분석을 하였다. 수종 식별 결과, 관재는 모두 소나무속중 소나무류 (적송류)로 동정되었다. 7개의 관재로부터 총 24점의 관편에 대한 연륜연대 분석결과, 6개에 대한 연대를 부여할 수 있었다. 횡대에 쓰인 관재는 수피를 그대로 간직하고 있고 마지막 나이테가 만재까지 완전히 형성되어 있어 1637년 가을에서 1638년 봄 사이에 벌채된 목재로 관을 제작하였음을 알 수 있었다. 다만 벌채후 건조, 저장 기간으로 인하여 연륜연대와 관의 제작 및 매장 연도와는 다소 차이가 있을 수 있다.

• 한국항해학회지
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• 제9권1호
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• pp.41-81
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• 1985

Tidal phenomenon can be utilized by the wise and cautious mariner to safely perform his duties as pilot and navigator. It can be either a help or hindrance to the mariner. The principle of MULDAE which expresses the determination of the state of the tide based upon knowledge of the lunar date and it has been used in Korea since ancient times. The folk method of calculation was essentially based on an unsystematic division of the lunar month, traditionally using the numbers 7 or 8. As the lunar cycle is complete in 15 days the tidal cycle should also correspondence closely to the lunar date. This paper represents the first scientific attempt to systematically investigate this unique traditional method of tidal calculation and contains a comparison of the MULDAE and ordinary (solar based) tide calculation methods. MULDAE was compared with the standard tide table for standard and island ports in Korea from 1982 to 1985. This study concluded that MULDAE was indeed an accurate adn reliable predictor of tidal activity. Furthermore, the number 6 was found to be the correct divisor upon which to base MULDAE calculations Also a formula expressing MULDAE as a function was discovered. This research show that MULDAE can be applied nationwide and is a reliable and easy way to predict tides based upon mean figures for certain ports and island A calender showing MULDAE is presented here for the first time. A clear relationship between the MULDAE method of calculating tides and the use of ordinary tide tables is proven.

• 한국농촌건축학회논문집
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• 제13권2호
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• pp.79-86
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• 2011

The purpose of this study is to understand a architectural characteristics of local church in Virginia, U. S. This study focuses on not only analyzing the worship and service program inherent in the site planning of local church but also introducing worship service space and chancel elements of it in the village of garden area. We surveyed five protestant churches where are located in suburban and rural area outside of Midlothian city in the early August, 2010. I surveyed church building site and worship service space of churches focused on platform design, interviewed the historical background and program of churches with ministers, and corrected annual calender and newsletter. The results of this study are as follows. First, the characteristics of site plan have a comfortable parking lots and site of churchyard(cemetery) with playground that can take an activities out of chapel. The axis of church building follows to front street. Second, worship services keep two types of traditional and comtemporary worship in order to consider of both adult and youth members. The worship hall has a balance of bilateral symmetry. Third, the form of platform is built that is able to perform a music drama and movement of sermon without only one church, GraceLand Church that church building has over fifty years, and they stick to simple traditional type of Chancel that is established by pulpit, table(altar), baptistery(only baptist church), music instruments, and so on.

• 펄프종이기술
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• 제36권3호
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• pp.60-66
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• 2004

The effects of roll diameter, winding time, winding methods and relative humidity on curl In newsprints(46$g/m^2$, 54 $g/m^2$, and 54 $g/m^2$ SNC) are examined. The larger MD curl appears at smaller roll diameter, with the extension of winding time, and at the treat ment of soft nip calendering. The MD curl shows the back side curl at winding methods with top side as outer side(TSO), and the top side curl with top side as inner side(TSI). While the CD curl in newsprints( 46 $g/m^2$, and 54 $g/m^2$ SNC) treated with calender is hardly influenced by the storage times, roll diameter, and winding methods. However the CD curl in newsprint(54 $g/m^2$) gradually increases to a two weeks, and then hold constant regardless of roll diameter and winding methods.. The CD curl shows always the top side curl regardless of winding methods. At high relative humidity, the CD curl largely reduces, but the MD curl is not nearly changed. Especially, the CD curl in news-prints(54 $g/m^2$ SNC) is little affected by the changes of relative humidity.