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Comparison on Antioxidant Potential of Several Peanut Varieties (땅콩 품종간 항산화 활성 비교)

  • 이승은;박장환;방진기;성낙술;정태영
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.33 no.6
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    • pp.941-945
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    • 2004
  • To increase utilities as functional materials, nine peanut varieties were evaluated on antioxidant activity and total phenol content. Peanut varieties were individually divided into three parts such as part without seed coat, seed coat, and seed. Each of the 80% ethanol-extracted solutions from the parts was used for the assay. Inhibitory activities on low density lipoprotein (LDL) oxidation by the part without seed coat, seed coat, and seeds from 9 varieties were respectively 85.3∼91.0%, 77.4∼85.8%, -1.7∼46.1%, and those on linoleic acid oxidation were 94.0∼94.9%, 94.2∼95.0%, 69.4∼80.2%, respectively. Seed coats, parts without seed coat, and seeds from 9 peanut varieties showed scavenging activities as 88.3∼98.7%, 16.7∼56.3%, -28.0∼20.0% on superoxide anion radical and as 89.9∼90.8%, 6.0∼12.0%, 0.6∼2.1% on 1,1-diphenylpicrylhydrazyl (DPPH) radical, respectively. Total phenol contents of seed coat, seed, and part without seed coat were 12.7∼21.0 mg%, 2.46∼4.24 mg%, 0.94∼1.16 mg% as tannic acid equivalent and those of Daekwang, Daesin, Bowon, Saedl, Kipung among the peanut varieties were comparatively high. In conclusion, Daekwang, Daesin, Kipung, and Saedl among the peanut varieties showed comparatively effective antioxidant activities.

Validation on the Bodywave Magnitude Estimation of the 2017 DPRK's Nuclear Test by Source Scaling (지진원 상대비율 측정법을 이용한 2017년 북한 핵실험의 실체파 규모 검증)

  • Kim, Tae Sung
    • Economic and Environmental Geology
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    • v.51 no.6
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    • pp.589-593
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    • 2018
  • Democratic Peoples' Republic of Korea (DPRK) conducted the $6^{th}$ underground nuclear test at the Punggye-ri underground nuclear test site on September 27, 2017 12 hours 30 minutes of Korean local time. Comprehensive Nuclear-Test Ban Treaty Organization (CTBTO) under U.N. announced the body wave magnitude of the event was mb 6.1 while U.S. Geological Survey (USGS)'s calculation was mb 6.3. In this study, the differences of the magnitude estimates were investigated and verified. For this purpose, a source scaling between the $5^{th}$ and $6^{th}$ event, which's epicenters are 200 meters apart, was performed using seismic data sets from 30 broadband stations. The relative amplitude variations of the $6^{th}$ event compared to the $5^{th}$ event in the frequency domain was analyzed through the scaling. The increased amount of the bodywave magnitude $m_b$ for the $6^{th}$ event was calculated at 1 Hz, which was compared to those from USGS and CTBTO's calculations.

A study on the moral instruction by Spinoza's Ethics (스피노자 『윤리학』으로 본 도덕과수업)

  • Song, Young-min
    • The Journal of Korean Philosophical History
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    • no.38
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    • pp.303-328
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    • 2013
  • The purpose of the present article is to understand moral instruction through Ethics written by Spinoza and enable the implications drawn from its understanding to give shape to lesson plans. In his representative book titled Ethics, Spinoza speculates ultimate substance from the metaphysical perspective and converges it into ethics. The ultimate substance, which is a cause of itself, refers to immanent cause of all things that have numerous attributes as essence. All things in nature develop the substance and exchange influence among individuals at the same time. A human in the influential relationship perceives things based on one's beneficialness and assigns moral words of good and evil. However, a human, who is a mode of substance, should escape from morals that are superficial, relative, and objective, in order to realize nature. Becoming a more complete human requires going through moral imagination in reality but going beyond the imagination ultimately. Moral instruction premises the moral imagination of a student who exists as a mode; meanwhile, it is a study to escape from the influence of moral imagination. Good and evil arise from the limitation that an existing human has, but if a life is to preserve the necessity of ultimate substance, moral instruction can be defined as the processes of alleviating the influence that hinders a human's nature from being realized. Giving shape to this processes with the basis on the Spinoza's epistemic argument, moral instructional texts can be composed of stages to form more adequate moral ideas about moral subjects gradually and cumulatively. The moral instruction like this expects moral awareness which is relatively perfect than the present moral imagination. Furthermore, with the teaching and learning like this sustained, it is expected that ultimately the limitation arising from sensible perception can be overcome to approach the realization of a human's nature.

A View Maintenance Algorithm Considering Network Delay in Data Warehouse Systems based on Materialized Views (실체 뷰를 기반으로 하는 데이터 웨어하우스 시스템에서 통신지연을 고려한 뷰 유지 알고리즘)

  • Han, Geun-Su;Sin, Dong-Cheon
    • Journal of KIISE:Software and Applications
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    • v.26 no.6
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    • pp.780-790
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    • 1999
  • 데이터 웨어하우스는 의사결정을 위하여 여러 소스로부터 데이터를 계속 축적하는 저장고로 볼 수 있다. 따라서, 데이터웨어하우스와 지역소스사이의 일관성 유지문제는 데이터 웨어하우스 환경에서 가장 중요한 문제중의 하나로 인식되어 오고 있다. 본 논문에서는 실체 뷰를 기반으로 하는 데이터 웨어하우스 시스템에서 통신지연을 고려한 일관성 유지 알고리즘을 제안한다. 기존의 연구와 달리 제안한 알고리즘은 다중 갱신을 허용하면서도 완전 일관성을 수준을 보장한다.

웹2.0 서비스 및 비즈니스 현황

  • Ryu, Han-Seok
    • TTA Journal
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    • s.111
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    • pp.45-52
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    • 2007
  • 웹2.0 개념이 소개된 이후로 웹 2.0의 실체에 대한 논란이 끊임없이 제기되어 왔다. 하지만 웹2.0의 실체는 있다. 웹2.0은 사용자 중심의 콘텐츠와 상호작용, 커뮤니케이션 능력의 확장을 구현하는 새로운 서비스들로 구성되어 있으며, 그것은 하나의 사회적 현상이 되어 문화에까지 영향을 미치고 있다. 또한 최근에는 기업 내부의 업무에도 영향을 미치는 단계로까지 발전하고 있다. 기술적인 측면에서 볼때 웹2.0은 소셜 컴퓨팅이 인터넷 애플리케이션으로 구현된 것이다. 본 고는 그러한 소셜 컴퓨팅의 카테고리와 그에 해당하는 정의 및 관련 웹2.0 서비스들을 살펴보고, 국내 웹 비즈니스 현황에 대해 알아보고자 한다. 이를 통해 웹2.0의 여러 서비스들의 가치 및 국내 웹 비즈니스가 처한 현실에 대한 이해를 돕고자 한다.

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SC27/WG2에서의 디지털서명과 실체 인증 표준 소개

  • Lee, Pil Joong
    • Review of KIISC
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    • v.25 no.4
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    • pp.18-31
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    • 2015
  • ISO/IEC JTC1/SC27/WG2 (Information technology - Security techniques - Cryptography & Security Mechanisms, 이하 줄여서 'SC27/WG2'로 표시)은 암호학을 중심으로 기술적인 정보보호 기법들을 표준화하는 기구이며, 그 역사 및 상세 소개는 같은 호에 송정환 교수가 할 것으로 알고, 본인은 SC27/WG2에서 다루는 디지털서명과 실체 인증에 관한 표준들에 대해 모든 내용을 구체적으로 소개하는 것 보다는 기법의 분류 및 찾아 볼 수 있도록 참고문헌을 소개하겠다.