• Title/Summary/Keyword: thought of change

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A Study on the Manufacturing of Porous Membrane for Separation of Gas Mixture by Al Anodizing Method (Al장극산화법에 의한 반휴분이용 다공성 격영의 제조에 관한 연구)

  • 윤은열;라경용
    • Journal of the Korean institute of surface engineering
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    • v.15 no.2
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    • pp.69-76
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    • 1982
  • With a view to manufacturing membranes for separation of gas mixtures, Al foils were anodized in a 2% oxalic-acid electrolyte at 40V and 80V. When anodizing was completed and Barrier layer existed at the extreme back site of the foil, the anodized foil was made to react with only electrolyte, with switching off the electric power. When the size and density of pores were changed through voltage change, the membr-anes did not show large difference in the permeability. Reacting with electrolyte, the existing Barrier layer turns into porous layer. During this process, several small pores grow from one relatively large pore, getting to the back site. The number and size of the small pores getting to the back surface increase as time passing. This change of Barrier layer into porous layer is thought to be directly related to the permeability change of the membranes. The selectivity of an anodized Al membrane was not related to the voltage change, and was high, being similar to the theoretical selctivity of metallic membranes, according to my observation.

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The Significance of Long-term Perception on Renewable Energy and Climate Change (신재생에너지와 기후변화에 대한 장기간 인식조사가 갖는 함의)

  • AHN, JOONG WOO
    • Transactions of the Korean hydrogen and new energy society
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    • v.29 no.1
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    • pp.117-123
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    • 2018
  • The long-term perception investigation of environment is needed for the persistence of each country's policy on climate change, which is greatly influenced by external factors. Long term data on perception and attitudes of people's thought can be a big data point for climate change and consistent policies can be implemented with the need for public demand. Information on the perception of the general public regarding the environment should be carried out as a basis for the national environmental policy.

Empirical Analysis on Change of Korean Male Pro- Basketball Players Draft System

  • Choi, Kyoung-Ho
    • Journal of the Korean Data and Information Science Society
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    • v.19 no.4
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    • pp.1081-1089
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    • 2008
  • Beginning in the 2007-2008 season, the men's pro-basketball league changed a foreigner selection method by introducing a draft system which leads to a tryout from the free agency system. Also in the same season, the woman's pro-basketball league changed its system from one that permitted foreign players to one that doesn't allow foreign player participation. The reason for this change is thought to be financial problems. However this institutional change brings about the reduction in the quality of basketball and it will affect spectators in a negative way. The empirical study attempted to analyze the effects which follows an institutional change in Korean men's pro-basketball. The research showed that the men's pro-basketball league wasn't affected at all due to foreigner selection method by a draft system that led to a tryout from the free agency system.

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A Study on the Formative Characteristics of the Pleats Expressed in Modern Fashion -Focusing on the Thought of G.W.Leifniz and G.Deleuze- (현대 패션에 나타난 주름의 조형적 특성에 관한 연구 -라이프니츠와 들뢰즈를 중심으로-)

  • Yang, Hee-Young;Yang, Sook-Hi
    • Journal of the Korean Society of Costume
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    • v.57 no.1 s.110
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    • pp.130-146
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    • 2007
  • Thought of postmodernism accepted between variety and differentiation is characterized by variability and indeterminacy aimed at continuous change. For that reason, modern fashion has been grouping a lot of manners for creation of the various different form and structure. This paper studies the characteristics of the folding system, which expands efficiency of the spatial utility and shows various forms. Folding system expressed in modern fashion could be divided the pleats, which were made of the folding, and the dreaperies, which were made of bending. This selects the pleats as a enlarged concept of the folding system that contains between the former and the letter. Pleats did not mean two dimensional folding surfaces, but three dimensional spatial structures. For understanding of the folding system as a three dimensional spatial structure, this is utilized with the thought of the 'le pli' of G.W.Leifniz and G.Deleuze. The pleats expressed in modern fashion can subdivided into 4 sets; crinkle system, origami system, fractal pleats by folding system, and drapery system. And Formative characteristics of the pleats are analyzed with enlargement, fluidity, deconstruction, irregularity.

A Study on the Long-term Absorption Rate of Organic Insulation Materials (유기질 단열재 장기 흡수율에 관한 연구)

  • Kim, Hae-na;Park, Jun-Seo;Shin, Joung-Hyeon;Hong, Sang-Hun;Jung, Ui-In;Kim, Bong-Joo
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2022.11a
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    • pp.195-196
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    • 2022
  • Insulation material absorption rate is closely related to thermal conductivity. In Korea, there is no study on the change of insulation material in a long-term continuous exposure environment. In this study, basic data on the long-term durability of insulation materials were obtained by measuring the absorption rate of insulation materials over time. For the purpose of providing, as a result of the measurement, PIR class2 No.2 and PIR noncombustible show similar absorption rate trends, which is thought to be due to the fact that both are made of rigid urethane foam, and flame retardant EPS has the highest absorption rate except for PF. This is thought to be because there is a space for absorption between the beads and the beads. In the case of XPS, it is thought that the reason for showing the lowest absorption rate is that because it is produced by extrusion, it has a high density and thus has less space for moisture to penetrate.

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An Analysis on the Climate Change Exposure of Fisheries and Fish Species in the Southern Sea under the RCP Scenarios: Focused on Sea Temperature Variation (RCP 시나리오에 따른 남해안 어업 및 어종의 기후변화 노출 분석 : 수온 변동을 대상으로)

  • Kim, Bong-Tae;Lee, Joon-Soo;Suh, Young-Sang
    • The Journal of Fisheries Business Administration
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    • v.47 no.4
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    • pp.31-44
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    • 2016
  • The purpose of this study is to analyze the climate change exposure of fisheries and fish species in the southern sea of Korea under the RCP climate change scenarios. The extent of exposure was calculated through weighted sum of the sea temperature forecasted by National Institute of Fisheries Science, and the weight were obtained from the time-space distribution of each fisheries or species, based on the micro-data for the fishing information reported by each fisherman. Results show that all the exposed sea temperature of RCP8.5 is higher than that of RCP4.5 in year 2100 as well as in near 2030, therefore it is thought to be very important to reduce the GHG emission even in the short term. The extent of exposure was analyzed to be comparatively high especially in the fisheries such as anchovy drag nets and species like cod, anchovy and squid. Meanwhile the method of this study is considered to be excellent to obtain the accurate extent of exposure under RCP scenarios, and therefore it is applicable on assessing the vulnerability of climate change in fisheries.

A Background on the Thought of Zhang-nan(樟南)'s medicine (장남(樟南)의 사상적 배경과 의학관)

  • Sung, Ho-Jun;Yoon, Chang-Yeul
    • Journal of Korean Medical classics
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    • v.17 no.4
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    • pp.145-154
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    • 2004
  • Zhang-nan(樟南) did not regarded the human's life phenomena as a simple physical change in his medical theory. He thought medicine in the light of the establishment of moralism and partly used it for the practical Confucianism as well. In view of the Chijunghwa(致中和), Zhang-nan(樟南) succeeded the tradition of the Simseongnon(心性論, Emotional naturalism) in Neo-Confucianism(性理學) in the point of essential and principal Junghwa(中和). Therefore, Zhang-nan(樟南)'s medical theory is very suggestive not only in Medicine but also in Liberal art which pursue the moral Seongmyeong(性命).

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A study on the behavior of CF, CF2 radicals in an inductively coupled plasma using Laser Induced Fluorescence (레이저 유도 형광법을 이용한 유도 결합 플라즈마내의 CF, CF2 라디칼의 거동에 관한 연구)

  • 김정훈;이호준;황기웅;주정훈
    • Journal of the Korean Vacuum Society
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    • v.9 no.1
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    • pp.76-80
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    • 2000
  • CF & $CF_2$ radicals in a $C_4F_8$ inductively coupled plasma were observed with laser induced fluorescence. 251.9nm UV laser was used for the $CF_2$ excitation and 265.3nm UV emitted light for the detection which has the maximum intensity among many induced fluorescence lights. In the case of CF radical detection, 232.9nm UV laser was used for the excitation and 247.6nm for the detection. $CF_2$ radical density increased toward substrate, while CF radical had its maximum at about 10nm away from the substrate. The atomic fluorine density which was studied by the actinometry increased as the position moves away from the substrate. This phenomena was thought to have a close relation with the polymer growth on the wafer. When the bias voltage increased, $CF_2$ , CF radicals decreased while the atomic fluorine increased tio some extent and then decreased, which was thought to be due to the change in the ionization and dissociation.

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Studies of Dokhwaljihwang that get weight, hematology, biochemistry change by Wistar rat's aging (Wister rat의 노화에 따른 체중, 혈액학적 및 혈청 생화학적 변화에 미치는 독활지황탕(獨活地黃湯)에 대한 실험적(實驗的) 고찰(考察))

  • Lee, Su-Young;Ahn, Taek-Won
    • Journal of Haehwa Medicine
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    • v.13 no.2
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    • pp.327-335
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    • 2004
  • Using aged Wistar rat living body change by aging Dokhwaljihwang was each orally administrated and achieved research about aging control. In Wistar rat 10, 30, 50 week and 40 week Dokhwaljihwang between 10 weeks form condition change of weight, change of intestine weight, hematology, blood chemistry, research result about serum content following conclusion get. 1. Observed gain in weight than control group form of Dokhwaljihwang to aged Wistar rat. 2. Is thought to promote activation of living body action gaining intestine weight along with gain in weight. 3. Displayed decrease of MDA's content of serum than control group form of Dokhwaljihwang to aged Wistar rat. 4. Change that is Wistar rat's hematological value by aging according to 10, 30, 50 week WBC, RBC, Hgb, monocytes, eosinophil etc. increase, and HCT, PLT etc. showed tendency that decrease according to old-week, and observed improvement that is hematological value than control group form of Dokhwaljihwang 5. Change that is Wistar rat's biochemical value by aging was measured highest in 50 week because ALT, AST, BUN, CRN, T-bili., T-chol, TG, TP, ALB, A/G, P etc. increase according to 10, 30, 50 week, and observed improvement that is biochemical value than control group form of Dokhwaljihwang. Is considered by being effect that Dokhwaljihwangimprove living body function decline by aging by this result.

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Study on the Change of Lipid Peroxides Amount While Beef Bulgogi Cocking (우육(牛肉)의 불고기 조리시 과산화지질의 변화에 관한 연구)

  • Shin, Duk-Kue
    • Journal of the Korean Applied Science and Technology
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    • v.6 no.2
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    • pp.75-87
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    • 1989
  • Study to report this result that state of lipid peroxides while beef Bulgogi Coocking of general-seasoning, sale-seasoning, each flavour's characteries. Raw meat show high lipid peroxides amount and high increasing in heat and antioxidative effected by flavour about lipid peroxidies change existence by beef Bulgogi seasoning. Change of lipid peroxides are significant increased in meat cold storage and cold storage and cold storage heat meat after while 30 minute after seasoned and reduced 9 hour - 33 hour cold storage raw meat, that change of lipid peroxides by cooking time. every condition by adding soften were revealed lipid peroxides, reduce. Lipid peroxide change are very high while no-sugar in raw meat and not a stone look in 9-hour raw-meat after seasone about antioxidative effect by each flavour characteristic TBA showed very high not take parched seasone seeds item about 30-minute cold storage beat raw-meat and high lipid peroxides revealed increase in not take wine item, not take a pear item, in 9 hour cold storage heat-meal and it showed little amount not-sugar item, no opepper item. According to high lipid peroxides change reduced high after seasoned cold storage stage in Korea traditional Bulgogi Cooking and thought high that action of antioxidative lipid peroxides wine and a pear in flavour.