• Title/Summary/Keyword: 구조양식

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한반도 남해 패류생산역의 입자유기물질 거동 특성 I. 해역별 입자유기물질의 농도와 조성

  • 이필용;강창근;최우정;이원찬;양한섭
    • Proceedings of the Korean Society of Fisheries Technology Conference
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    • 2000.10a
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    • pp.146-147
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    • 2000
  • 해양에서 입자유기물질은 생태계 내 먹이망의 중요한 요소로서 작용한다. 입자유기 물질이 생태계 내 먹이망의 에너지원으로 전환, 이용될 때 그러한 물질과 에너지 흐름 경로를 이해하기 위해서는 이들 물질의 구성 요소에 대한 지식이 필요하다. 본 연구에서는 서로 다른 지형구조와 양식대상 생물을 가지는 여러 내만의 양식 환경을 이해하기 위하여 일차적으로 한반도 남해의 대표적인 이매패류 양식해역 3개 해역에 대한 입자유기물질의 분포와 조성을 조사ㆍ비교하였다. (중략)

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Textural, Isotopic, and Chemical Investigation of Cultured Pearls (양식진주의 조직적, 동위원소적 및 화학적 연구)

  • Woo, Kyung Sik
    • 한국해양학회지
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    • v.24 no.2
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    • pp.69-78
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    • 1989
  • Cultivated pearls, composed of aragonite crystals, show two distinctive layers: nacreous and conchiolin organic layers. Each aragonite crystal is surrounded by organic matrix, which probably consists of amino acids. Nucleus, surrounded by pearl layer, also consists of nacreous crystals, suggesting that there is a close mineralogical and ultrasturctural relationship between pearl and nucleus. Carbon isotopic values of cultivated pearls are within the range of marine carbonate carbon. Oxygen isotopic composition indicates that the temperature for the growth of pearl and pearl oyster ranges from 16.4 to $21.4^{\circ}C$ and from 15.5 to $24.8^{\circ}C$, corresponding to the summer temperature range of the cultivating area. Elemental composition of pearl, pearl oyster, and nucleus shows that there is a difference in chemical composition depending upon the original mineralogy and the chemical composition of water in which shells grow. Especially, a strong relationship exists between pearl and the inner layer of pearl oyster because both are composed of nacreous aragonite and formed in a shallow marine environment.

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집중분석 / 정보화시대의 기술발달로 전자잡지 위상 파악 급선무

  • Kim, In-Suk
    • Digital Contents
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    • no.3 s.94
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    • pp.56-61
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    • 2001
  • 디지털 혁명과 새로운 매체환경 변화로 이제 잡지산업은 잡지언론으로서의 역할과 지식산업으로서 성장하기 위한 새로운 전략이 요구되는 시점에 서 있다. 컴퓨터와 정보통신의 결합은 새로운 공동체와 새로운 소통양식을 낳았다. 특히 새로운 소통양식에서는 개인 정보 발신자를 등장시켰는데 독립웹진이 그 예라 할 수 있다. 송신측면에서는 단일 거대 미디어 업체가 정보내용과 정보유통을 독점하는 구조가 흔들릴 수 있다.

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Development of Industrialization Model of IoT-Based Smart Farm (스마트 수직구조 양식장의 원격제어 App 개발)

  • Kim, Yu-Hwan;Kim, Byeong-Jun;Shin, Kyoo-Jae
    • Annual Conference of KIPS
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    • 2018.10a
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    • pp.343-345
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    • 2018
  • 전력 발전사들은 해안을 중심으로 운영되고 있는데, 이는 발전하는 과정에서 회전기기 터빈과 발전기 열을 냉각시키기 위해 해수를 사용한 후, 발생한 온배수는 해안으로 방출되고 있다. 양식장에는 수온 관리를 하는데 큰 비용이 발생하기 때문에 수열에너지를 공급하는데는 경제적으로 매우 중요하다. 따라서 효율적인 스마트 양식장을 운용하기 위해서는 발전소에서 폐수로 방출되는 온배수 에너지원을 재생에너지로 활용하여 이 열을 저장하고 양식수조에 공급하는 온배수 히트펌프의 수온 제어시스템과 양식수조의 최적화 설계를 위하여 새로운 형태의 육상수조 양식구조와 수질과 수온을 제어하는 IoT(Internet of Things)기반의 스마트 양식장이 필요하다.

Application of Load and Resistance Factor Design Format to Designing Flexible Pavements (LRFD 기법을 활용한 연성포장 설계방안에 관한 연구)

  • Kim, Hyung-Bae
    • International Journal of Highway Engineering
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    • v.5 no.1 s.15
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    • pp.1-10
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    • 2003
  • The objective of pavement design, just as with the design of other structures, is to obtain the most economical designs at specified levels of reliability. Methods that yield designs with different levels of reliability are undesirable, and over the course of time design approaches in the U.S. and Europe have converged toward the Load and Resistance Factor Design (LRFD) format in order to assure uniform reliability. At present the LRFD format has been implemented in concrete, steel, wood and bridge design specifications. In this paper, reliability theories are used to illustrate the development of an LRFD format for Mechanistic-Empirical (M-E) design of flexible pavements as an alternative of its reliability module. It is shown in this paper that ten candidate pavement sections designed with a reliability level using the AASHTO design guide (1986) do not have uniform structural reliability in terms of pavement mechanistic distress such as fatigue cracking and the uniform reliability can be achieved by using the LRFD format.

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Study on the Characteristics of Western Rocker style In Early 20th Century (20세기 초기 서양 흔들의자의 양식적 특징)

  • Lim, Seung-Taek
    • Journal of agriculture & life science
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    • v.45 no.6
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    • pp.21-32
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    • 2011
  • This research is intended to study literatures relating to western rocking chairs style in early 20th century in order to provide basic data of designs for rockers of today in Korea and investigate characteristics of rocking chair from academic, formative and pragmatic perspectives. During the first half of 20th century, western rocking chairs (1925~1945) embodied actively the simple functionalism concept that furniture design must follow functionality considerations. Therefore, bare wood rocking chairs were without any surface decoration and tubular steel frame rocking chairs often included black leather upholstery in a bold attempt to express exposed structure. And the fact that tubular steel produced such lightweight furniture was crucial importance. Many Modernist designer created curvaceous lines of new pattern changes in their furniture. The structure of Modern rocking chair became all-important, for stylistic as well as functional reasons. Designers equated exposed structure of tubular steel and wooden frame with integrity and rationality and create an equalitarian style of design. Especially, designers in the early 20th century did use various brilliantly colored upholstery and wooden frame with simple forms of modern characteristics.

Analysis on the Earth Science Concepts of the Gifted Science Students and Non-gifted students By the Type of Thinking Styles (과학영재학생과 일반학생의 사고양식에 따른 지구과학 개념 비교)

  • Park, Soo-Gyong
    • Journal of the Korean earth science society
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    • v.25 no.8
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    • pp.708-718
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    • 2004
  • On the basis of Sternberg's theory of mental self-government, this examined the difference in thinking style between gifted science students and non-gifted students, and their earth science concepts by the different types of thinking styles. The subjects were consisted of 120 students from the Busan Science Academy and 122 students from two general high schools in Busan, Korea. All participants responded to the Thinking Styles Inventory which is a self-report test consisting of 65 items, and essay questions for examining the students' earth science concepts. The results are as follows. First, the gifted science students prefer legislative, judical, anarchic, global, and liberal styles, where non-gifted students prefer executive, oligarchic, and conservative styles. Second, Type I thinking style group prove to have more complex concepts in relation to the geological and astronomical areas than those of the Type II thinking style group in both of the gifted and non-gifted students. This indicates that Type I thinking style students use a deep learning approach where Type II thinking style students use a surface learning approach.