• Title/Summary/Keyword: Degree condition

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Knowledge, Media and Information in the Age of Digital Reproduction (디지털 복제 시대의 지식, 미디어, 정보 - 지식의 기술.사회적 조건 변화를 중심으로)

  • Paik, Wook-Inn
    • Korean journal of communication and information
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    • v.49
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    • pp.5-19
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    • 2010
  • The purpose of this paper is to disclose the characteristics of knowledge in the age of digital reproduction. To achieve this I extended Benjamin's concept of technological reproduction to three different stages as mechanical reproduction, electric reproduction and digital reproduction. Each stage has different degree of reproducibility and de-materialization. I also combined McLuhan's concept of the electricity at the point of de-materialization with reproducibility. The degree of materiality and reproducibility is the key concept which could scale the technical condition of knowledge production. The social condition of knowledge reproduction is controlled by economic and political factors. In this connection between technological and social condition the current knowledge production and intellectual property could be explained properly. This study could open the theoretical door to deepen such an understanding.

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A Study of Buying and Wearing Fur Clothes (모피의류의 구매 및 착용실태 I)

  • 오선숙
    • The Research Journal of the Costume Culture
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    • v.3 no.1
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    • pp.109-124
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    • 1995
  • This study is purposed to analyze the degree of content and wearing style of fur cloths in order for women to buy them effectively and to wear them contentedly. So scrutinized buying style and wearing condition of fur clothes. To show whether women's buying fur clothes are suitable for their body or not, this study was examined characteristics, sorts, method of fabrication and manufacture, buying pattern and trends of fur clothes. The conclusion from this study examining the degree of possession, decision making of buying and recognition of fur clothes are as followings: 1. When women wears fur clothes, style of fur clothes have nothing to do with their body and height, and women who are 150∼160cm tall content to fur clothes commonly. 2. Condition of buying fur clothes, many 40's women whose only husband earns family's bread belong to fur clothes, and buy them, talking with a husband. Also, according to income a month, and to the ind of a job, in case of a couple's earning family's bread together, women whose whose income is 800,000 to 1,000,000₩ level. 3. Condition of wearing fur clothes, the cause that women feel like wearing fur clothes is as following: economic stability their own pride, and contentment to wear them. Women want to wear those different from fur clothes that they possess, and half coat, because of working conveniently. As the above mention, purchasers recognite the conception of fur clothes for themselves, and buy economically them, and must wear those of which design and style are suitable for body.

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STUDY ON THE PERTURBED PIECEWISE LINEAR SUSPENSION BRIDGE EQUATION WITH VARIABLE COEFFICIENT

  • Jung, Tacksun;Choi, Q-Heung
    • Korean Journal of Mathematics
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    • v.19 no.2
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    • pp.233-242
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    • 2011
  • We get a theorem that there exist at least two solutions for the piecewise linear suspension bridge equation with variable coefficient jumping nonlinearity and Dirichlet boundary condition when the variable coefficient of the nonlinear term crosses first two successive negative eigenvalues. We obtain this multiplicity result by applying Leray-Schauder degree theory.

Robust Stability and Transient Behavior of a Two-Degree-of-Freedom Servosystem (2자 유도 서보계의 강인한 안전성 및 과도특성)

  • 김영복
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.32 no.1
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    • pp.59-66
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    • 1996
  • This paper considers robust stability and transient behavior of the Two - Degree - of - Freedom(2DOF) servosystem. A class of uncertainties allowed in the plant model is obtained, to which the servosystem is robustly stable for any gain of the integral compensator. This result implies that if the plant uncertainty is the allowable set defined by the condition, a high - gain compensation can be carried out preserving stability to achieve a high - speed tracking response. The transient behavior attainable by the limit of the high - gain compensation is calculated using the singular perturbation approach.

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ELLIPTIC PROBLEM WITH A VARIABLE COEFFICIENT AND A JUMPING SEMILINEAR TERM

  • Choi, Q-Heung;Jung, Tacksun
    • Korean Journal of Mathematics
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    • v.20 no.1
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    • pp.125-135
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    • 2012
  • We obtain the multiple solutions for the fourth order elliptic problem with a variable coefficient and a jumping semilinear term. We have a result that there exist at least two solutions if the variable coefficient of the semilinear term crosses some number of the eigenvalues of the biharmonic eigenvalue problem. We obtain this multiplicity result by applying the Leray-Schauder degree theory.

A Study on the Character of Okchun Feldspar (옥천 장석의 특성에 관한 연구)

  • 최용식;이종근;이경희;이병하;김영호
    • Journal of the Korean Ceramic Society
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    • v.27 no.2
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    • pp.149-154
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    • 1990
  • Before benefication of Okchun feldspar, all kinds of Fe-compounds and mafic minerals which were included in feldspar were studied. Also to produce 30/140mesh products as glass materials, optimum grinding condition and degree of liberation were studied. Fe-compounds were Biotite and Limonite, and these were existed along the cleavage. Optimum grinding time was 2min. and at this time weight percent of 30/140mesh products was 72.7% and degree of liberation at this particle size was 91.5%.

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A Study on the Cup-Type Compression Molding for Continuous Fiber-Reinforced Poymeric Composites (연속섬유강화 플라스틱 복합재료의 컵형 압축성형성에 관한 연구)

  • 오영준;김형철;조선형;김이곤
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 1997.10a
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    • pp.176-181
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    • 1997
  • During a compression molding of continuous fiber reinforced composites, the separation of matrix and fiber is caused by the flow of the molding process. As the characteristics of the products are greatly dependent on the separation, it is very important to clarify the separation in relation to molding condition, degree of needle punching number on the degree of nonhomogeneity are studied.

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Performance estimation of conical picks with slim design by the linear cutting test (I): depending on attack angle variation (선형절삭시험에 의한 슬림 코니컬커터의 절삭성능 평가(I): Attack Angle 변화에 의한 결과)

  • Choi, Soon-Wook;Chang, Soo-Ho;Park, Young-Taek;Lee, Gyu-Phil
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.16 no.6
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    • pp.573-584
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    • 2014
  • In this study, the variations of cutter acting forces depending on cutting conditions were examined to obtain basic data for roadheader cutting head design. The linear cutting tests were performed in the condition of different attack angles, penetration depths, cutter spacings by using a slim conical pick for the light cutting condition. Cutter acting forces were measured by 3-directional load cell under different test conditions, and the analysis for cutting performance were carried out after calculating average values of the measured results. It is confirmed that the optimal cutting condition for the mortar specimen is the 50 degree attack angle, the cutter spacing of 12 mm, the cutting depth of 9 mm which are obtained from the analysis results. In addition, 50 degree attack angle is more effective than 45 degree attack angle to design optimal specifications of cutting head.

Changes in Sugar Contents and Storability of Yacon under Different Storage Conditions

  • Doo, Hong-Soo;Li, Hu-Lin;Kwon, Tae-Oh;Ryu, Jeom-Ho
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.45 no.5
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    • pp.300-304
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    • 2000
  • Tuberous roots of yacon (Polymnia sonchifolia Poeppig & Endlicher) were stored in different temperature and relative humidity conditions after curing for 30 days. Non-decadent percentage, moisture contents, brix degree and sugars were investigated. Whether temperature and relative humidity were high or not, most of the tuberous root decayed during storage, and the decayed percentage was increased as long as the storage period. In final, only 13% of tuberous roots remain intact at 4$^{\circ}C$, 85% relative humidity condition to be appeared best storage condition in this experiment and all of the tuberous root decayed in other storage conditions after 6 months. Moisture contents decreased a little in the high relative humidity. Even though tuberous roots decayed when stored at 1$0^{\circ}C$ and 2$0^{\circ}C$, most of brix degree reached about 17.0. Fructose, glucose and sucrose contents were 1.65, 1.15 and 0.35% at early storage period, and 1.6, 1.1 and 0.5% after 6 months at 4$^{\circ}C$, 85% relative humidity, respectively. In 3 temperature conditions, fructose and glucose increased for a month and then decreased successively afterwards, but sucrose increased gradually during 6 months. Also in 4 relative humidity conditions, fructose, glucose and sucrose contents were changed with similar to that of in temperature. Changes of fructose and glucose were the same except on 4$^{\circ}C$, 85% relative humidity, that was lower level than moisture of tuberous root.

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Manufacture of Biodegradable Polymer with Wastepaper(I) - Pretreatment and Analysis of Chemical Components On Wastepaper - (폐지를 이용한 생분해성 고분자의 제조(I) - 폐지의 화학적 조성 분석 및 전처리 -)

  • Kwon, Ki-Hun;Lim, Bu-Kug;Yang, Jae-Kyung;Chang, Jun-Pok;Lee, Jong-Yoon
    • Journal of the Korean Wood Science and Technology
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    • v.28 no.3
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    • pp.34-41
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    • 2000
  • Recently many scientists have tried to synthesize biodegradable polymers due to durable and non-biodegradable products of conventional synthetic plastics when these were wasted in nature. So to reuse the wastepapers for biodegradable polymer resources, ONP (old newsprint), OCC (old corrugated containerbpard) were carried out by the pretreatment of chlorinite, hypochlorite and oxygen-alkali treatment conditions. For manufacturing of biodegradable polymer with wastepaper, this study performed to investigate change of chemical components and optimal pretreatment condition. The summarized results in this study were as follows: Lignin content in ONP and OCC was was higher than in MOW and ash content was the highest in MOW. More amount of ash components were reduced by wet defiberation than by dry defiberation. Wet defiberation fiber are better than dry defiberated fiber in chemical pretreatment condition for wastepapers, and the best result was obtained in the condition of sodium chlorite at $70^{\circ}C$, because it has high delignification ratio, ${\alpha}$-cellulose contents and degree of polymerization in this treatment condition. Oxygen-alkali treatment condition is the worst method because of low yield, low degree of polymerization in this pretreatments.

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