• 한국구조물진단유지관리공학회 논문집
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• 제20권2호
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• pp.1-9
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• 2016

저자들은 비파괴시험에 의한 고강도콘크리트의 강도 예측식을 제안하기 위하여 실험적 연구를 수행하였다. 본 연구에서 사용된 콘크리트의 설계압축강도는 40~80 MPa 범위이며, 압축공시체를 제작하여 반발경도법과 초음파 속도법으로 실험한후 KS기준에 따라 압축강도 실험을 실시하였다. 실험결과는 기존의 연구자들에 의하여 제안된 다양한 실험예측식들과 비교분석하였다. 실험결과 고강도 콘크리트에서도 반발경도법과 초음파속도법의 경우 간편성과 신뢰성에 있어 콘크리트 강도를 측정하기에 충분한 유용성을 확보한 것을 확인할 수 있었다. 기존식들과의 비교를 통하여 고강도 콘크리트에 적합한 강도예측식을 제안하였으며, 실험결과에 대한 충분한 신뢰성을 확보한 것으로 판단되어, 향후 고강도 콘크리트 구조물에 적용할 수 있을 것으로 판단된다.

• Journal of Information Processing Systems
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• 제4권4호
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• pp.159-168
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• 2008

Human-Robot Interaction (HRI), based on already well-researched Human-Computer Interaction (HCI), has been under vigorous scrutiny since recent developments in robot technology. Robots may be more successful in establishing common ground in project-based education or foreign language learning for children than in traditional media. Backed by its strong IT environment and advances in robot technology, Korea has developed the world's first available e-Learning home robot. This has demonstrated the potential for robots to be used as a new educational media - robot-learning, referred to as 'r-Learning'. Robot technology is expected to become more interactive and user-friendly than computers. Also, robots can exhibit various forms of communication such as gestures, motions and facial expressions. This study compared the effects of non-computer based (NCB) media (using a book with audiotape) and Web-Based Instruction (WBI), with the effects of Home Robot-Assisted Learning (HRL) for children. The robot gestured and spoke in English, and children could touch its monitor if it did not recognize their voice command. Compared to other learning programs, the HRL was superior in promoting and improving children's concentration, interest, and academic achievement. In addition, the children felt that a home robot was friendlier than other types of instructional media. The HRL group had longer concentration spans than the other groups, and the p-value demonstrated a significant difference in concentration among the groups. In regard to the children's interest in learning, the HRL group showed the highest level of interest, the NCB group and the WBI group came next in order. Also, academic achievement was the highest in the HRL group, followed by the WBI group and the NCB group respectively. However, a significant difference was also found in the children's academic achievement among the groups. These results suggest that home robots are more effective as regards children's learning concentration, learning interest and academic achievement than other types of instructional media (such as: books with audiotape and WBI) for English as a foreign language.

• Journal of Animal Science and Technology
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• 제63권3호
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• pp.465-474
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• 2021

It has become important to explore alternative feed ingredients to reduce feed costs, which are burdensome for livestock production. In addition, it is desirable to find efficient and functional alternative ingredients for traditional feed ingredients in pig diets, considering the stress and sensitivity of disease of pig. Rice is produced around the world like corn that is the typical energy source in pig diets. Although the nutritional quality varies depending on the degree of milling, rice, except whole grains (paddy rice), contains more starch than corn and its structure and granule size are easier to digest than corn. In addition, the fact that rice has fewer non-starch polysaccharides (NSP) and anti-nutritional factors (ANFs) is also effective in improving digestibility and various polyphenols in rice can help modulation of immune responses, which can be beneficial to the gastrointestinal environment and health of pig. Many studies have been conducted on rice focusing on things such as degree of milling, substitution rates of corn, granule size, and processing methods. Most results have shown that rice can be partially or completely used to replace corn in pig diets without negatively affecting pig growth and production. While further research should focus on the precise biological mechanisms at play, it was confirmed that the use of rice could reduce the use of antibiotics and pig removal and protect pigs from gastrointestinal diseases including diarrhea. From this point of view, rice can be evaluated as a valuable feed ingredient for swine diets.

• 디지털융복합연구
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• 제17권8호
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• pp.95-104
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• 2019

최근 소프트웨어 교육이 4차 산업혁명의 핵심요소로 강조되고 있으며, 이러한 시대적 요구에 따라 많은 대학들이 전교생을 대상으로 하는 소프트웨어 교육을 강화하고 있다. 전교생을 대상으로 하는 SW교육 도입을 위해 온라인 콘텐츠의 활용은 효과적인 방안이라고 할 수 있다. 그러나 일률적인 온라인 콘텐츠의 제공은 학생들의 개별적인 특성(전공, 흥미, 이해력, 관심분야 등)을 고려하지 못하는 한계를 갖는다. 본 연구에서는 불리언 형태의 시청이력 데이터 환경에서 콘텐츠 간의 방향성 있는 유사도를 활용하는 추천 기법을 제안한다. 연관규칙 분석의 확신도를 유사도 값으로 활용하는 새로운 아이템기반 추천 수식을 제안하여 국내의 실제 유료 콘텐츠 사이트의 데이터에 적용하였다. 실험 결과 코사인, 자카드 등의 전통적인 유사도 방식을 기반으로 하는 협력적 추천방식을 사용할 때 보다 추천 정확도가 향상됨을 확인할 수 있었다.

• 문화기술의 융합
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• 제8권4호
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• pp.397-405
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• 2022

NFT 아트는 NFT 기술을 바탕으로 형성된 새로운 미술형태로써 기존 미술계와 미술시장에서 큰 관심을 끌고 있다. 따라서 NFT 아트가 새로운 미술의 영역으로 자리매김할 수 있는가에 대한 분석이 요구된다. 따라서 NFT 아트의 형성과 발전 과정을 과학기술학(Science and Technology Studies)의 행위자네트워크 이론(Actor-Network Theory)의 관점에서 분석하고 대표적인 사례로 NFT 아티스트 '비플(beeple)'의 사례를 조망한다. 또한 과학기술학 연구자인 그레이엄 하먼(Graham Harman)의 미학을 바탕으로 NFT 아트의 예술적 가치와 전통 미술 네트워크와의 관계를 논의한다. 특히 NFT 프로젝트 '크립토펑크(Crypto punks)'와 새로운 미술장르를 표방하는 '펑키즘(PUNKISM)' 사례를 통해 NFT 아트의 미래와 장르적 지속가능성을 분석한다. 행위자네트워크 이론으로 NFT 아트를 분석함으로써 기술적, 미적, 철학적 질문들을 가시화하고 새로운 미술장르로써의 긍정적인 전망을 제시하고자 한다.

• 한국의류산업학회지
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• 제25권5호
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• pp.560-567
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• 2023

This study aims to rediscover the industrial value of a borderless service in the hyper-connected era by producing fashion content at the forefront of the cultural industry as XR content and contributing to developing fashion content for edutech. The research method employed design aesthetic theory, while the empirical proposal utilized scientific knowledge information to build a framework for 3D convergence content. The characteristics of fashion content exhibitions that apply the neumorphism technique are as follows: The first is a virtual space that produces clothing culture by type. Africa, where dyeing and crafts are developed, selects a product-oriented exhibition type; Asia, where weaving and textiles are excellent, selects a random movement type; and Europe, where the evolution of clothing design over time is evident, selects a guided movement type to create a three-dimensional fashion edutech. The goal was to produce content. The second is creative reproducibility, which combines a new fashion design that embraces the aura of the original with a trendy sense. The realistic folk costume style of the original allowed for its implementation in the AR exhibition space using historical traditional style techniques such as weaving and textiles. The third is building organic, modular content. By designing and then saving/editing/arranging the basic VP zone for each style, learners and instructors can freely edit the content for each fashion class topic and create various presentations to ensure that it functions as non-face-to-face edutech content around the world.

• Korean Journal of Acupuncture
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• 제41권1호
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• pp.7-15
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• 2024

Objectives : This study aimed to predict the effectiveness and potential of Schizonepeta tenuifolia as an anticancer treatment for non-small cell lung cancer through network-based pharmacology and cellular experiment. Methods : To identify the major bioactive compounds in Schizonepeta tenuifolia, we used the Traditional Chinese Medicine Systems. The target genes for the cancer treatment were selected using the UniProt database and the networked using Cytoscape. We performed functional enrichment analysis based on the Gene Ontology Biological Process and Kyoto Encyclopedia of Genes and Genomes Pathways to predict the mechanisms. To investigate the effect of Schizonepeta tenuifolia on lung cancer cell growth, we treated A549 cells, a lung cancer cell line, with different concentrations of the drug and used the MTT assay for cell viability. Results : Research has shown that the most effective mechanism of active compounds from Schizonepeta tenuifolia is through the pathway of cancer. The results of the network pharmacology analysis indicate that Schizonepeta tenuifolia has potential medicinal value as an adjuvant in anticancer treatment. The concentration-dependent inhibition of cell viability was observed on A549 cells. Furthermore, synergistic anticancer activity with Doxorubicin was also observed. Conclusions : Through a network pharmacological approach, Schizonepeta tenuifolia was predicted to have potential as an anticancer agent, and its efficacy was experimentally demonstrated using A549 cells. These findings suggest that Schizonepeta tenuifolia is a promising candidate for future research.

• 보건교육건강증진학회지
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• 제6권1호
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• pp.22-33
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• 1989

Rapid socio-cultural and economic changes in the country has brought with it changes in the society's value system. For a traditional society that is increasingly being exposed to modernization but where sex norms are still very restrictive, the adolescent sexual mores takes on added significance. Adolescents are caught between two opposing forces, the changing environment that allows for freer and liberal mores and the traditional society that cannot keep pace with the changing environment and therefore demands resistance to changes. This paper focuses on problems of adolescent sexuality in this country and considers the countermeasures for the existing problems. Amongst the problems are: (a) increasingly younger age of the adolescents who start sexual intercourse (b) non-use of contraception, (c) unwanted pregnancies, (d) increase in the number of induced abortion and (e) increase in the number of unwanted children and unmarried mothers. The Korean adolescent's sexual behavior seems to follow that of the developed countries. In other words, many western modes of life and sexual values seem to bave been copied in Korea and yet Korean adolescents lack in their knowledge of sex related matters such as reproductive physiology and contraception. Among middle and high school students, female students are reported to have less knowledge on sex than male students according to a 1988 survey by KIPH. Even among the unmarried famale factory workers, only 42.5 percent replied they know of the condom, and 25.1 percent and 23.1 percent said they had knowledge of spermicide and menstrual regulation respectively. However, 14.9 percent and 13.9 percent reported that they had a knowledge of the loop and female sterilization respectively according to the 1984 study by KIPH. Among the middle school students 0.8 percent said they had experience in sexual intercourse, while 7.3 percent of the high school students reported having had sexual intercourse. The sexual intercourse experience rate among the unmarried female factory workers is 37.8 percent. Among those female factory workers with sexual experience, 46.7 percent had more than one sex partners. Only 39.1 percent of male students and 18.9 percent of female students among those with sexual intercourse experience have used contraceptives. mostly condoms and oral pills 45.1 percent of female factory workers with sexual intercourse experience used contraceptives such as pills, condoms and rhythm methods. The pregnancy experience rate among the female factory workers who had experience in sexual intercourse is 29.5 percent, which is 11.1 percent among the total respondents. Out of the 102 pregnant female workers, 98 workers(96.1 percent) terminated their pregnancy by induced abortion and 2 workders(2 percent) in natural abortion, while 1 worker(1 percent) was in pregnancy and another 1 worker had normal birth that was subsequently sent to orphanage. In order to cope with the problem of adolescent sexuality, a drastic and strong policy measures should be taken by the government. The most effective countermeasure to the adolescent sexual problems appears to the education. The sex and population education in the school is very much in need. In addition, sex education program through mass media and at the job sit-should be promoted for a healthy development of adolescents' sexual behavior. Also, the existing national family planning program, which has focused on the married couples, should be extended to the unmarried people in its scope and contents of the program.

• 대한암한의학회지
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• 제16권1호
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• pp.41-53
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• 2011

Background and Objectives: Iodine is an essential constituent of the thyroid hormones associated with the growth and development of humans and animals as an inorganic nutrition. This element may be accumulated in human blood, tissues and body through the intake of foodstuffs, a beverage, a nutritional supplement and a medicine, among others. The aim of the research is to find out a better medicinal stuff for the thyroid cancer patient who required a low level of iodine diet. Methods: Neutron activation analysis (NAA) used for the iodine analysis is one of nuclear analytical techniques using radiation and radioisotopes and very useful as sensitive analytical technique for performing both qualitative and quantitative multi-elemental non-destructive analysis of major, minor and trace components in variety of environmental and biological materials. In this study, iodine contents in ten kinds of oriental herb medicinal products, which is frequently used to cancer patients are determined by using instrumental neutron activation analysis (INAA) at the HANARO research reactor. The samples prescribed are manufactured as powdered form for taking medicine easily. The analytical quality control is performed to assure an uncertainty of the measurement and to compensate the measured data using a biological certified reference material, NIST SRM 1572, Citrus Leaves. The measured value is $1.89{\pm}0.35mg/kg$, and the relative error is 2.88%, and relative standard deviation is 19 % due to high counting error by small counts of gamma ray spectrum. The standard deviations for other elements such as Cl, K, Mn and Na were in the range of 2 to 8%. Result: The level of iodine contents of Biki-huan, Chungryong-huan and Chungcho-huan, samples detected is less than 6 mg/kg except Hangam Plus sample (more than 210 mg/kg) and six samples were not detected. Iodine in the samples of Shoxiho-tang, Shopunghualhyl-tang, Shocungryong-tang, Banhasaxim-tang, Insampaedox-san and Myunyuk Plus were not measured, but possible level of content can be estimated from the detection limits. In addition, the concentrations of some major elements like Cl, K, Mn, Na, in the samples were determined with the detection limits. Conclusions: Most of samples showed low iodine contents of less than 6 mg/kg but it turned out that most of testing samples can be used to classify the level of iodine diet samples considering the recommended low level of iodine diet 50 ${\mu}g$/day, and a better medicinal stuff for the thyroid cancer patient can be found.

• 생명과학회지
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• 제15권2호
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• pp.236-241
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• 2005

본 연구에서는 3주령의 암컷 흰쥐를 이용하여 미역취뿌리 추출물이 골대사에 미치는 영향을 조사하고자 미역취뿌리 메탄올 추출물을 10, 50, 100 mg/kg/day의 농도로 음용수에 희석하여 9주간 사육시켰다. 매주 체중과 사료효율을 측정한 결과, 대조군에 비해 체중의 변화나 사료효율에는 유의적으로 차이가 없는 것으로 보아 미역취 뿌리 추출물에 대한 기본적 독성은 없고, 성장에 미치는 영향은 없는 것으로 사료되었다. 그리고 3주 간격으로 소변으로 배출되는 Ca과 P의함량을 ICP로 분석 한 결과, 10 mg/kg/day농도로 음용한 군에서 유의적으로 감소됨을 확인 할 수 있었고 혈액으로 유리되는 Ca과 P의 함량 또한 섭취군에서 유의적으로 감소되는 것을 확인하였다. 또한 섭취 후 9주째에 양에너지 방사선 골밀도 측정기(dual energy x-ray absorptiometry, DEXA)를 이용하여 척추, 대퇴골, 골반의 골밀도와 골무기질 함량을 측정한 결과, 메탄을 추출물을 음용한 군의 척추 골밀도가 대조군에 비해 유의적으로 높게 나타났으며, 글 무기질 함량 또한 대퇴골과 골반에서 대조군에 비해 유의적으로 높게 나타났다. 따라서 미역취뿌리 메탄을 추출물의 음용이 암컷 흰쥐에서 골밀도 및 골함량에 유의하게 작용하고 또한 골대사 과정에서 유리되는 Ca와 P의 대사과정에 작용하여 유리되는 Ca과 P의 양을 감소시켜 이상의 결과로 미뤄볼 때, 적절한 미역취뿌리 추출물의 투여는 흰쥐의 성장에 대해 부작용이나 독성없이 골밀도와 골무기질 함량을 높였으며 앞으로 조골세포 기능 저하로 인한 골대사 질환에 사용되어 질 수 있을 것이다.