• 한국산업융합학회 논문집
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• 제27권3호
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• pp.555-561
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• 2024

This paper derives material properties of steel bars that simulate the distribution of stress and strain of prestressed tendons used in Prestressed concrete(PSC) girders and presents an optimal material model. ABAQUS software was used to establish the 3D solid model of the PSC girder and strand wire rope for a PS(Prestressed) tendon. Then the model of steel wire rope was imported into the Isight interface plugin directly through the ABAQUS and the Data Matching. In ABAQUS, the contact pairs were established, the models were meshed, the constraints were applied to solve the finite element model and an axial tension of 0.5m/s was loaded to analyze the stress and deformation distributions in the normal working range of the PS strand wire rope. In Data Matching, classical experimental data is fitted to the optimal material properties through finite element analysis and multi-objective optimization. The results show that the steel bar with optimal material properties presents a similar linear area and stress distribution with the PS tendon.

• 한국환경농학회지
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• 제30권3호
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• pp.288-294
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• 2011

최근에는 전처리가 단순하며 정량 시 방해물질의 영향을 최소화하기 위해 액체크로마토그래피를 이용하여 메틸수은을 분리한 후 유도결합플라즈마/질량분석기로 part per billion 수준까지 정량하는 방법들의 연구가 활발하다. 하지만 대부분의 액체크로마토그래피-유도결합플라즈마/질량분석기는 메틸수은 분리 시 전처리 용액의 pH를 조절하지 않으면 피크깨짐 등의 문제가 발생하여 pH를 조절하고 있다. 본 연구에서는 어류에 잔류하는 메틸수은을 신속하고 정확하게 분석하기 위하여 마이크로웨이브를 이용한 전처리 방법, HPLCICP/MS 조건, 시험법 검증의 실험을 통하여 효율적인 분석법을 확립하였다. 전처리 방법은 추출용매 1% L-cysteine HCl로 추출온도 $60^{\circ}C$에서 추출시간 120분 동안 추출하는 최적 조건을 확립하였다. 기기조건 중 HPLC에서는 시료주 입량 $50{\mu}L$, 컬럼온도는 $25^{\circ}C$에서 0.1% L-cysteine HCl + 0.1% L-cysteine 이동상으로 메틸수은을 분리 한 후, ICP-MS에서 분자량 202의 분석물질을 정량하는 조건을 확립하였다. 직선성에 대한 상관계수 값은 0.9998 이였으며, 검출한계 및 정량한계는 각각 0.15, $0.45{\mu}g/kg$ 이었다. 확립된 전처리 및 기기조건을 통하여 시료별 회수율을 구한 결과 95~99%였다. 전처리 용매와 이동상에 L-cysteine이 존재함으로써 수은에 대한 안정성, Memory effect 및 피크 끌림 등의 문제를 해결할 수 있었다. 확립된 HPLC-ICP/MS 방법에 대해 표준인증물질을 이용하여 검증한 결과, 회수율 및 상대표준편차가 각각 93~96%, 1~3%였다. 확립된 방법은 추출과정 후 별도의 전처리 과정 없이 바로 HPLC-ICP/MS를 이용하여 검출할 수 있어 메틸수은을 분석하기에 매우 적합한 것으로 판단된다.

• 한국전자통신학회논문지
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• 제12권3호
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• pp.477-484
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• 2017

기존의 순환여과식 양식장에서는 전문 인력의 부족, 수입 측정 장비에 대한 높은 의존도 등으로 인하여 많은 어려움을 격고 있다. 이에 본 논문에서는 최신 IoT기술을 적용한 광학식 센서(pH, DO)를 이용하여 양식장 수조 내 오염도를 빠른 시간내에 측정할 수 있는 자동 수질 측정 시스템을 구현하고자 한다. 기존 시스템의 문제점은 양식장 수조를 사람이 일일이 확인하거나, 측정 장비를 수조 속에 넣고 직접 측정을 하여 물고기의 생육에 좋지 않은 영향을 주는 것이다. 본 논문에서는 시스템은 측정 장비를 수조 속에 담그지 않고 간접 측정을 하는 방식을 제안하고 염분 및 다수의 오염 물질이 포함된 환경에서도 양식장 내의 물고기의 생육에 영향을 주지 않고 지속적인 측정이 가능한 시스템을 개발하였다.

• 복식
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• 제39권
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• pp.167-179
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• 1998

The objective of this study is to examine the costumes of the period covered in the writings of Shilhak (practical science) scholars and to research the history of costumes and their characteristics by examining how they are worn in genre paintings which are said to describe the actual life of the period. This should be studied in order to correctly establish the history of costumes. To begin with, through the writings of the representative Shilhak scholars who are thought to have affected the changes in ordinary costumes for woman, this study examined how ordinary woman of the period looked in their costumes and how they regarded various costumes they had. Then, how their viewpoints of costumes influenced ordinary costumes was investigated. Not only relics, but what was commonly worn, as they appeared in the genre paintings that contain information about daily living of that period, were researched chronologically. The results of this study showed that the change in ordinary costumes for woman in the late Chosun period was affected by Shilhak scholars who had ideologies of Shilsakusi (use of positive methods in studying), Yiyonghusaeng (the promotion of commerce and industry and the development of techonologies), and Ky ngsech'iyong (pursuit of stability in a rural economy). Moreover, after those changes there were many more changes. However, the criticism of costumes of that time and the will of revolution affected some time, costumes changed directly. The forms of the costumes had been changed in a variety of ways following the tendencies of the times, but the origin of today's hanbok (Korean traditional dress) had already been fixed in the late Choson period. Yet, today's hanbok are for special occasions, not worn as ordinary clothing. Thus, there are several reasons why the hanbok is not suitable for daily life. One of the reasons is that Korean could not cope with the western costumes indepen-dently imported during Japanese occupation in the last period of the Choson Dynasty and con-tinuing the Japanese Colony. Thus, only a part of the ordinary costume of the late Choson period has remained until now.

• 한국인쇄학회지
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• 제27권1호
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• pp.15-27
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• 2009

Since domestic offset print quality control depends on the experience of persons in charge rather than objective data, the standards from the data are needed for the well-organized quality management of high-quality prints. Based on the ISO standards, now the standard specifications, such as GRACoL 7, SWOP 11, SNAP, G7 in America, and EURO Color, ECI, BVDM in Europe, and Japan Color 2001, Japan Color 2004 in Japan, are employed. There exists KS for domestic standards. However, since it has been directly imported from ISO Standards, there are discrepancies in printing materials and media. Although the quality management of commercial prints has been focused and studied. For this circumstance, standards are needed for the production of prints to meet international standards. This paper aims to find out suitable ways to approach domestic printing standards using densitometric method and colorimetric method. Printing experiments on this study were performed with domestic process color inks(Cyan, Magenta, Yellow, Black) and domestic coated papers, under the same conditions as the actual commercial printing processes. In densitometric method, how to set up the optimal solid print density was studied through three tests such as the ways to match solid print density and print contrast to GRACoL standards respectively, and the way to get the highest contrast. In colorimetric method, how to get solid print density with the minimum color difference between the $CIEL^*a^*b^*$ color specification values in GRACoL standards and the measured color specification values in prints, was studied.

• 한국콘텐츠학회논문지
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• 제16권9호
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• pp.40-50
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• 2016

본 연구에서는 해외 프로그램 수용 모델을 도입, 한류를 소비하는 이질 문화권 수용자 특성과 노출, 평가가 지속적인 시청 의향에 어떠한 효과를 미치는가를 살펴보았다. 미국의 젊은 여성 수용자 176명의 응답을 분석한 결과, 한국 인지도, 일반적인 드라마 노출이 한국 드라마 노출에 직접적인 효과를 미치는 것으로 나타났으며, 한국 드라마 평가, 지속 시청 의향에도 간접적 효과를 미치는 것으로 나타났다. 한국 드라마 노출은 드라마에 대한 평가와 지속 소비 의향에 영향을 미치는 것으로 나타났으며, 드라마 평가가 지속 시청 의향에 미치는 효과는 매우 높은 것으로 나타났다. 하지만 한국인 네트워크는 종속 변인에 유의한 효과를 미치지 않는 것으로 나타났다. 이러한 연구 결과는 이질 문화권 수용자의 문화적 자산이 한국 드라마 소비에 영향을 미치고 있음을 의미한다. 일반적인 드라마 소비 성향이 이질 드라마의 소비로 연장된다는 본 연구의 결과 역시 의미 있는 발견으로, 한류 시장 확대를 위한 정책에 시사점을 제공한다.

• 건축역사연구
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• 제20권2호
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• pp.39-54
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• 2011

The Bunhuangsa stone pagoda, constructed in AD. 634, National Treasure no. 30, has been named as 'brick-copied pagoda' since the Japanese-ruling period by scholars. It is said that the Chinese brick pagoda was its precedent model, however the Bunhuangsa Pagoda is the oldest of all the Chinese-style brick pagodas except one, the Sungaksa Pagoda. The Chinese pagoda cannot have been a precedent model to copy due to its complex detail of wood vestige, as the Bunhuangsa pagoda is simple form without ornament. Domestic brick pagodas cannot have been a precedent model to copy as well, because all the domestic brick pagodas are younger than the Bunhuangsa Pagoda. Therefore, the terminology 'brick-copied pagoda' is a fallacy; it is rather that later brick pagoda copied the precedent the Bunhuangsa stone pagoda. The Bunhuangsa Pagoda is simply a piled-up pagoda of thick or thin, big or small slates of stone, facing only one smooth side and therefore needing nothing to relate to brick. The originality of the pagoda is more related to simple piled-up Indian stone stupa rather than Chinese brick pagoda. The roof form of its gradually stepped projection comes from the harmika of the summit of Indian stupa. Contrary to general history, old Silla Dynasty imported Buddhism directly from India by sea. From written national history and by temple foundation history, the Indian Buddhism evangelist possibly made influence to the erecting of temple and pagoda. The original wrong terminology has made a harmful effect gradually to the naming of mass-styled stone pagoda of only carved stepped-roof form after brick-copied pagoda. The false term 'brick-copied pagoda' should be discarded, which comes with superficial observation based on toadyism to China and colonialism to Japan. Instead of the fallacious term, this paper suggests multi-storied 'piled-up pagoda with slate stone.'

• 무역상무연구
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• 제41권
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• pp.237-266
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• 2009

KORUS-FTA are consist of articles 8. In order to the subjects are, application of a safeguard measures, conditions and limitations, provisional measures, compensation, global safeguard actions, definitions, antidumping and countervailing duties, committee on trade remedies. In especially, regarding application of a safeguard measures under KORUS-FTA, if as a result of the reduction or elimination of a customs duty under this agreement, an originating good of the other party is being imported into the territory of a party in such increased quantities, in absolute terms or relative to domestic production, and under such conditions that the imports of such originating good from the other party constitute a substantial cause of serious injury, or threat thereof, to a domestic industry producing a like or directly competitive good, the party may: suspend the further reduction of any rate of customs duty on the good provided for under this agreement; increase the rate of customs duty on the good to a level not to exceed the lesser of: the most-favored-nation (MFN) applied rate of duty on the good in effect at the time the action is taken; and the MFN applied rate of duty on the good in effect on the day immediately preceding the date this Agreement enters into force; or in the case of a customs duty applied to a good on a seasonal basis, increase the rate of duty to a level that, for each season, does not exceed the lesser of: the MFN applied rate of duty on the good in effect for the corresponding season immediately preceding the date of application of the safeguard measure; and the MFN applied rate of duty on the good in effect for the corresponding season immediately preceding the date this agreement enters into force.

• 제3의학
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• 제2권2호
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• pp.253-295
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• 1997

It is very critical to specify certain medical personnels in defining the history of certain era. Due to the limited source of information and lack of thorough research, there still aren't enough study grounded on concrete historical investigation. Authors attempted to investigate those medicinal personnels engaged in Three Kingdoms period in terms of the activity area, relation with religion and their role in medical system and medical exchange. The sum of recorded medical personnels in Three Kingdoms period numbers 50 of which 6 belonged to Kokooryo, 18 to Baekje, 7 to Shilla and 19 to Unified Shilla. There might existed far more medical personnels who tried to alleviate the suffering of the people and were not recorded in the documents. The more earlier in times, the more medicine gets the religious tinge. This is not the exception for the period of the Three Kingdoms and those medicine men, wizard doctors and priest doctors were playing important role in healing people and processing crude drugs. The system of royal physician and medical education facility were established and doctors and pharmacists, shamanic doctor, herb collectors, Kongbong's doctor(供奉醫師), Kongbong's diviners(供奉卜師) took leads in medicine in those times. Those folkloric healers also took part in. Korea imported chinese medicine and Japan employed chinese medicine via Korea or directly from China and developed into traditional japanese medicine. In this process those who emigrated from Baekje and Kogooryo and their offsprings took an active part. Since the limited source of information of Three Kingdoms, we only can infer the me야cal environment of those times by featuring the activities of medical personnels.

• 한국의류학회지
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• 제40권1호
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• pp.56-68
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• 2016

Popular culture has symbolic meaning and has been constructed through different mass media. Newspapers played a significant role in 1950s and 1960s public culture. In particular, editorial cartoons in newspapers expressed social aspects of the age implicitly through satire and criticism. This study examines delivered culture by reflecting the past social aspects and inquiring on clothing featured in the editorial cartoon "Gobau". As for a research method, literature research was conducted on clothing of the age with a review of "Gobau". As for a research range, examination was done based on the complete works of Gobau composed of 5 volumes published as a first edition by Hankookmunhwasa on November, 1973. Early "Gobau" cartoons from 1951-1963 were published in 5 volumes; therefore, research was conducted for the era from 1950s to the early 1960s. Clothing expressed in "Gobau" were reviewed, classified into formative characteristics and internal meaning. Internal meaning was examined by dividing into the expression of social aspects and criticism of society. The research findings are as follows. First, clothing in "Gobau" reflected characteristic in direct manner. There was a coexistence of Hanbok and western-styled, clear distinction between men's trousers and women's skirt. Besides, various kinds of women's western-styled dress appeared in the 1960s. Second, they showed the dress culture that reflected past social aspects. Many aspects were included to reconstruct old and worn clothes due to scarce resources after the Korean War, and cherishing clothes, buying fabric directly to making clothes, making clothes from dressmaking shop, and restrictions on imported goods and luxury items. Third, the study also examined the social norms for fashion. It contained negative perspectives on women wearing pants, short skirts, and new hair styles (like perms) from western culture as well as lipstick.