• Magazine of the Korea Concrete Institute
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• v.18 no.6 s.95
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• pp.46-50
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• 2006

• Journal of Conservation Science
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• v.29 no.2
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• pp.149-159
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• 2013

The painted folding screen of Crown Prince Munhyo at Boyangcheong, Munhyo-seja Boyangcheonggyebyung, was made to record the court ceremony where Crown Prince Munhyo(1782-1786), the firstborn son of King Jeongjo, met his first teacher called Boyanggwan for the first time at Boyangcheong, a government agency specifically founded to provide education for a crown prince, in January 1784. Having never been treated before, this 8-fold screen is still in its original presentation of Joseon Dynasty screen paintings of court ceremonies in the 18th century. The mountings of folding screens in Joseon Dynasty has been researched through the study of the mounting of the Boyangcheong screen and the conservation treatment of the screen has been based on this research. The result of the pigment analysis shows the use of lead white, red lead, vermilion(cinnabar), azurite, malachite, litharge(massicot), carbon black(Chinese ink). The microscopic observation has proved that the painting was painted on verso in most areas and finished on recto to highlight the details or to produce subtle hues by applying light colors.

• Proceedings of the Korea Concrete Institute Conference
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• 2001.05a
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• pp.769-774
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• 2001

The purpose of this study is to analyze the curing effect of heating cable for concreting in cold weather. An experiment was conducted to evaluate the temperature history of concrete structures cured with embedded heating cables. Results are as follows : In comparison with the non-heating case, applying of heating cable resulted in the rise of temperature in the range of $10^{\circ}C$. In order to get successful results, the optimal pitch length for the embedded heating cables ranged from 20cm to 25cm. When working with the existing curing methods, applying this heating cable would be more effective in concrete curing. Finally, a formula and process was suggested to predict the Internal temperature history of concrete structures under the various curing conditions.

• Monthly Korean Chicken
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• v.18 no.8
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• pp.106-109
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• 2012

농촌진흥청은 여름철 보양식으로 알려진 삼계탕의 수출확대 방안으로 미국, 일본, 중국 등 각 나라의 기호도를 고려한 삼계탕의 다양한 요리법을 신안산대 정재홍 교수팀과 공동으로 개발했다. 각 나라에서 선호하는 음식재료와 다양한 조리방법을 이용한 삼계탕 요리법에 대해 알아보자.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2003.05a
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• pp.19-22
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• 2003

The purpose of this study is to analyze the curing effect of planar surface heater for concreting in cold weather. Some experiments were conducted to evaluate the temperature history of concrete structures cured with heating sheets. Results are as follows ; (1) The temperature of concrete showed continuously rising trend with the heating by planar surface heater under the cold environmental condition of 3~-12$^{\circ}C$. And after about 24 hours the maximum temperature of concrete was reached at 25~3$0^{\circ}C$. (2) The temperature of slab concrete heated by planar surface heater of 130W/$m^2$ was at least $25^{\circ}C$ higher than that of an exterior air, and the curing performance was much more effective than heating by hot wind machine. (3) Through the curing by planar surface heater for 48 hours, the concrete maturity of about 1.5 times to heating by hot wind machine was acquired.

• The Korean Journal of Food And Nutrition
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• v.16 no.1
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• pp.60-65
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• 2003

An antioxidant compound was obtained from the water extract of the stem bark from Rhus verniciflua, which has been used in traditional folk remedies. The compound was purified by HPLC, using DEAE, CN and ODS columns. The chemical structure of the compound was identified as gallic acid (3,4,5-hydroxylbenzoic acid) by spectral data including UV, IR, EI (HR)-MS, $^1$H-NMR, $\^$13/C-NMR and elemental analyzer. This compound was found show cytotoxicity against HeLa cell ( IC$\_$50/ : 8.5$\mu\textrm{g}$/$m\ell$).

• Journal of the Korea Institute of Building Construction
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• v.11 no.4
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• pp.333-344
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• 2011

The recent expansion in the number of housing construction projects has been accompanied by substantial improvements in construction quality, which can be attributed to the development of new construction technologies and materials. In apartment complex construction projects, numerous mechanization technologies have been adopted as part of the floor plastering process to counter increasing difficulties in securing labor and the pressing need to reduce lead time, but these have also triggered setbacks such as additional costs or loss of time to fix cracks in or loosening of floor. Cracks developing in the floor of an apartment housing unit, in terms of materials in use, are the products of a complex combination of material makeup, construction workmanship, concrete curing and the protection method. Controlling such elements from the perspective of materials in use may ensure partial success in reducing cracks, but fall short of eliminating them completely. Any attempt to prevent cracks from developing in the first place requires systematic analysis as to their potential causes and viable solutions to reduce them. On this backdrop, this paper aims to provide an analysis of potential causes of cracks found in floor plastering, and consider the mechanism of a crack stop-bar as a fundamental safeguard against them.

• Korean Journal of Construction Engineering and Management
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• v.1 no.2 s.2
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• pp.53-62
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• 2000

A concrete element is obtained through multi-steps, and its quality is affected by site conditions and control constituents of procedures. In these regards, in order to assure designed qualities of concrete and associated materials of the element good quality control method is necessary in various procedures. The existing quality control measures do not satisfy the requirements for the quality control activities at each production step. This study provides a more effective checklist for each phase of concrete work, which improves existing quality control checklist through extensive research on current practices and surveys from expertises. This paper also proposes the application of multi-facet codes to develop a customized checklist to improve the efficiency in field practices and the effectiveness in assuring the designed performance of concrete. This study finally provides a more effective checklist for each phase of concrete work by improving usability of the developed project sensitive matric quality control checklist through application experiments on construction project sites.

• Journal of the Korea Concrete Institute
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• v.23 no.3
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• pp.347-352
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• 2011

When concrete is worked in cold weather, the methods of using hot air, water and aggregate heating, accelerators are used to prevent early frosting and to improve early strength. But these methods raise problems such as implementation difficulty, high cost, and energy losses. Among the available cold weathering methods, accelerator method is the most economical but with the drawbacks of rapid setting and insufficient workability in the initial hydration stage. Therefore, the tablet method usually used for pharmaceutical field was applied to the accelerator method to compare the controlled reaction time of the new and old accelerator method. Based on the test results, physical and mechanical properties of concrete were tested and the possibility of delaying initial reactions to increase the total reaction time was evaluated. The results showed that when both accelerators and tablet were used, setting-time decreased. Physical properties of concrete were optimal for tablet 0.5% and 1.0%. Also, accelerator 0.5%, tablet 0.5% and 1.0% showed good early strengths.

• Journal of Korean Medical classics
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• v.18 no.4 s.31
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• pp.101-119
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• 2005

금원사대가적태두류완소(金元四大家的泰斗劉完素), 1110년생어하북성하간현(年生於河北省河間縣), 졸어(卒於)1200년(年), 향년(享年)90세(歲). 타통과연구(他通過硏究)${\ulcorner}$황제내경(黃帝內經)${\lrcorner}$화(和)${\ulcorner}$상한론(傷寒論)${\lrcorner}$, 저술료(著述了)${\ulcorner}$소문현기원병식(素問玄機原病式)${\lrcorner}$, ${\ulcorner}$황제소문선명론방(黃帝素問宣明論方)${\lrcorner}$, ${\ulcorner}$소문병기기의보명집(素問病機氣宜保命集)${\lrcorner}$, ${\ulcorner}$상한표본심법류췌(傷寒標本心法類萃)${\lrcorner}$, ${\ulcorner}$상한직격론(傷寒直格論)${\lrcorner}$등저작(等著作). 령외, 응용운기대이론진행연구(應用運氣對理論進行硏究), 주장(主張)‘화열론(火熱論)’, 제출이한량약물치료질병적방법, 사금원시대재의학상(使金元時代在醫學上), 형성료백가쟁명적국면(形成了百家爭鳴的局面). 필자통과대류완소적방제학설급임상경험적연구(筆者通過對劉完素的方劑學說及臨床經驗的硏究), 득출여하결론(得出如下結論): 재방제학설상(在方劑學說上), ${\ulcorner}$황제소문선명론방(黃帝素問宣明論方)${\lrcorner}$중(中), 기사용적(其使用的)${\ulcorner}$상한론(傷寒論)${\lrcorner}$화각가급기제자문운용방제(和各家及其弟子們運用方劑), 공포괄(共包括)366개(個). 대부분주장료이용신고적한약(大部分主張了利用辛苦的寒藥), 래개통울결(來開通鬱結), 조습제열(操濕除熱). ‘상복보양(常服保養)’시인위여기소거주적중국북방(是因爲與其所居住的中國北方), 기후건조(氣候乾操), 인문다식습성강(人們多食濕性强), 차교표한적식물(且較標悍的食物), 소이유사인체장위비조적경향(所以有使人體腸胃秘操的傾向). ${\ulcorner}$황제소문선명론방(黃帝素問宣明論方)${\lrcorner}$적(的)366개방중(個方中), 유산제(有散劑)126개(個), 탕제(湯劑)87개(個), 기중(其中), 지유(只有)18개방가칭지위진정적탕제, 기여도접근위자산(其餘都接近爲煮散). ${\ulcorner}$황제소문선명론방(黃帝素問宣明論方)${\lrcorner}$중소나열적주요방제유(中所羅列的主要方劑有)‘방풍통성산(防風通聖散)’, ‘삼화신우환(三花神佑丸)’, ‘쌍해산(雙解散)’, ‘삼일승기탕(三一承氣湯)’, ‘대금화환(大金花丸)’, ‘익원산(益元散)’, ‘대건중탕(大建中湯)’, ‘당귀룡담환(當歸龍膽丸)’, ‘비방다주조산(秘方茶酒調散)’, ‘계령감로산(桂零甘露散)’, ‘천궁석고탕(川弓石膏湯)’, ‘전성산(全聖散)’, ‘지유탕(地楡湯)’, ‘인참산(人參散)’, ‘작약탕(芍藥湯)’, ‘내통황연탕(內統黃連湯)’, ‘신궁환(神芎丸)’, ‘도환산(倒換散)’등(等). 재임상경험상(在臨床經驗上), 류씨유풍부치료경험(劉氏有豊富治療經驗), 단시유감적시몰유전하일부관우의안방면적저작(但是遺憾的是沒有傳下一部關于醫案方面的著作). 재질병적치료상(在疾病的治療上), 가간출기유독창적견해(可看出其有獨創的見解), 저일점도견우(這一點都見于)${\ulcorner}$소문현기원병식(素問玄機原病式)${\lrcorner}$등이론저작(等理論著作), 우기산견어(尤其散見於)${\ulcorner}$황제소문선명론방(黃帝素問宣明論方)${\lrcorner}$중(中).