• 한국미생물·생명공학회지
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• 제5권3호
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• pp.119-125
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• 1977

섬유소 단세프 단백질의 대량생산 시험을 위하여 pilot plant 규모의 시험공장 연구를 수행하였는바 그 결과를 요약하면 다음과 같다. 1) 시험공장에서 균체생산을 위한 최적 조건을 pH 7.4, 온도 34$^{\circ}C$, 교반량 130rpm, 통기량 0.4~0.6VVM이었다. 2) 최적배양 조건에서 배지의 적정 수준은 기질로서 볏짚이 4%, (NH$_4$)$_2$SO$_4$0.2%, $K_2$HPO$_4$0.05%, KH$_2$PO$_4$0.10%, NaCl 0.2%, MgSO$_4$ㆍ7$H_2O$ 0.01%, CaCl$_2$ㆍ2$H_2O$ 0.01%, C. S. L. 0.02%였다.

• 패션비즈니스
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• 제12권2호
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• pp.100-116
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• 2008

This study aims to analyze the characteristics of deconstruction-ism expressed in the fashion of Alexander McQueen. The method and contents of this study are as follows. The three large categories for analysis are indeterminacy, decentralization, and intertextuality. The indeterminacy of meaning is divided into unstructured and unorganized factors in fashion, while decentralization can be categorized into cross-gender, subculture, and post-humanism. Lastly, inter-textuality is classified into factors of mixing mode and mixed styles. Materials for analysis were chosen from a total of 616 designs from the website, www.firstview.com, which carries McQueen's collection from 2000 S/S through 2007 F/W. My analysis qualitatively evaluates the frequency of each category and the characteristics of design. The result of this study is as followed. First, the avant-garde facets of inter-textuality are most prominent. In particular, McQueen has introduced retro fashion and ethnic factors of the third world, not to copy them but to create hybrid designs by using pastiches and mixing fashion styles. Moreover, he has enjoyed using two fabrics of different texture in order to inflict a shock and contrast, thus enriching his fashion. Second, the indeterminacy of meaning is the second most frequently shown facet of McQueen's fashion design. McQueen has employed unstructured expression techniques, which dismantle harmony and balance, the basic rule of design, and has presented unorganized images free from basic forms of design. He has made a new attempt to acknowledge clothing as an expressive artwork by allowing clothes to take a complete form when a person actually wears them. Third, the aspects of decentralization were also shown in McQueen's design. His trans-gender clothing dissolves the traditional division of men and women and adopts a mixed gender expression. Furthermore, he has even tried to express a fourth gender by connecting the human with machine or animal or by connecting the material with the non-material.

• 한국환경교육학회지:환경교육
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• 제22권3호
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• pp.49-62
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• 2009

This study started from the need to change the technocentric view of environment into the ecocentric one to overcome ecological crisis today. Thus, the purposes of this study are to reorganize characteristics of ecocentrism, to analyze ecocentrism of Native North Americans as a realistic model, and to finally find suggestions to environmental education. The results of this study can be summarized as follows; Frist, the ecocentric perception on relationship between human beings and nature pursues co-existence through harmony and balance based on holistic understandings. And the ecocentric perception on relationship among human beings attempts to preserve environment by overcoming rule structure among them. The ecocentric perception on relationship between human beings and spirituality is to set life goals to achieve spirituality rather than to pursue material life. Second, Native North Americans have a holistic world view that human beings and nature are an inseparable one through the symbol of 'the Sacred Circle'. They also lived simple lives which satisfies vital needs instead of pursuing material lives in terms of the perception on relationship among human beings. When it comes to the perception on relationship between human beings and spirituality, they feel sacredness from all things in daily life and want to have peaceful relationships with their own inside through spirituality toward 'Mother Earth'. Third, the ecocentrism of Native North Americans make suggestions that environmental education confirm again what roles of human beings are in ecosystem, and that it helps students develop ecological sensitivity by giving them many opportunities to go to field trips. Furthermore, environmental education helps them positively think about and actively choose simple life. In addition, it has to be designed to help students seek sacredness in daily life through ecological imagination. This study has values of newly organizing characteristics of each ecocentric idea by integrating it from complementary aspects, and pursuing direction of ecocentrism and its realistic possibility by analyzing the ecocentrism of Native North Americans as a model of ecological life.

• Structural Engineering and Mechanics
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• 제44권4호
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• pp.431-448
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• 2012

In this paper, the first-order shear deformation theory (FSDT) (Mindlin) for continuum incorporating surface energy is exploited to study the static behavior of ultra-thin functionally graded (FG) plates. The size-dependent mechanical response is very important while the plate thickness reduces to micro/nano scales. Bulk stresses on the surfaces are required to satisfy the surface balance conditions involving surface stresses. Unlike the classical continuum plate models, the bulk transverse normal stress is preserved here. By incorporating the surface energies into the principle of minimum potential energy, a series of continuum governing differential equations which include intrinsic length scales are derived. The modifications over the classical continuum stiffness are also obtained. To illustrate the application of the theory, simply supported micro/nano scaled rectangular films subjected to a transverse mechanical load are investigated. Numerical examples are presented to present the effects of surface energies on the behavior of functionally graded (FG) film, whose effective elastic moduli of its bulk material are represented by the simple power law. The proposed model is then used for a comparison between the continuum analysis of FG ultra-thin plates with and without incorporating surface effects. Also, the transverse shear strain effect is studied by a comparison between the FG plate behavior based on Kirchhoff and Mindlin assumptions. In our analysis the residual surface tension under unstrained conditions and the surface Lame constants are expected to be the same for the upper and lower surfaces of the FG plate. The proposed model is verified by previous work.

• 한국전기전자재료학회논문지
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• 제24권6호
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• pp.519-524
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• 2011

ABLB (alternate binaural loudness balance) test is one of the medical assessments to diagnose detailed lesion of sensory-neural hearing loss based on a recruitment phenomenon. However, current ABLB audiometry takes an operational model, so called face-to-face model, in which model one audiometrist can assess only one subject at a time. As a result, this face-to-face model leads to expensive audiometrist's labor cost and lengthy wait when there exist many subjects. As a solution, this paper suggests an ABLB audiometry system supporting one-to-many model in which model an audiometrist enables to assess several subjects concurrently. By providing such capabilities as real-time transfer of assessment result, video monitoring of subject and video chat, this solution can provide same effect as face-to-face model but overcome weakness of the existing face-to-face model.

• Steel and Composite Structures
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• 제10권2호
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• pp.129-149
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• 2010

The objective of this study is to formulate a general 3D material-structural analysis framework for the thermomechanical behavior of steel-concrete structures in a fire environment. The proposed analysis framework consists of three sequential modeling parts: fire dynamics simulation, heat transfer analysis, and a thermomechanical stress analysis of the structure. The first modeling part consists of applying the NIST (National Institute of Standards and Technology) Fire Dynamics Simulator (FDS) where coupled CFD (Computational Fluid Dynamics) with thermodynamics are combined to realistically model the fire progression within the steel-concrete structure. The goal is to generate the spatial-temporal (ST) solution variables (temperature, heat flux) on the surfaces of the structure. The FDS-ST solutions are generated in a discrete form. Continuous FDS-ST approximations are then developed to represent the temperature or heat-flux at any given time or point within the structure. An extensive numerical study is carried out to examine the best ST approximation functions that strike a balance between accuracy and simplicity. The second modeling part consists of a finite-element (FE) transient heat analysis of the structure using the continuous FDS-ST surface variables as prescribed thermal boundary conditions. The third modeling part is a thermomechanical FE structural analysis using both nonlinear material and geometry. The temperature history from the second modeling part is used at all nodal points. The ABAQUS (2003) FE code is used with external user subroutines for the second and third simulation parts in order to describe the specific heat temperature nonlinear dependency that drastically affects the transient thermal solution especially for concrete materials. User subroutines are also developed to apply the continuous FDS-ST surface nodal boundary conditions in the transient heat FE analysis. The proposed modeling framework is applied to predict the temperature and deflection of the well-documented third Cardington fire test.

• 전기화학회지
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• 제24권2호
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• pp.13-27
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• 2021

스테인레스 강은 지구상에서 가장 널리 사용되고 있는 철의 합금으로 니켈과 크롬을 포함하여 높은 내부식성을 가지고 있어 구조용 강재로 사용하기 매우 적합하다. 또한, 최근에는 스테인레스 강에 포함된 철과 니켈의 고유 특성을 이용하여 다양한 고기능성 촉매나 지지체, 또는 전극의 집전체 등으로의 응용 연구가 다양하게 이루어지고 있다. 특히, 높은 촉매 특성으로 인해 수전해 전극으로의 응용을 위한 스테인레스 강의 표면에서의 활성화 표면 처리 연구가 많이 이루어지고 있다. 이에 본 총설은 수전해 전극 응용을 위한 스테인레스 강의 수전해 전극 응용 표면처리 기술 자료를 정리 및 요약하였으며, 스테인레스 강의 표면처리 방법에 대한 특징 및 이를 통해 스테인레스 강이 저비용 고효율의 수전해 전극 활용을 위한 촉매 물질로써 응용될 수 있는 여러 방법을 제시하였다.

• 한국태양에너지학회 논문집
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• 제27권3호
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• pp.87-94
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• 2007

In this paper, with water-LiCl-$CaCl_2-Zn(NO_3)_2$ mixture which utilizes solar energy at the evaporator heat source, a thermodynamic analysis was performed to provide design data for a double-effect absorption heating system. A comparative study of the water-LiCl-$CaCl_2-Zn(NO_3)_2$ mixture against the water-LiBr pair was conducted by a computer simulation. The computer simulation is based on mass, material and heat balance equations for each part of the system. Coefficients of performance and flow ratios for effects of different operating temperatures are investigated. It is found that the heating COP is higher for the water-LiCl-$CaCl_2-Zn(NO_3)_2$ mixture than for the water-LiBr pair, and FR is lower for the former.

• 한국태양에너지학회 논문집
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• 제26권4호
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• pp.73-81
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• 2006

In this paper, with water-LiBr-LiSCN mixture which utilizes solar energy as mid temperature range evaporator heat source, a thermodynamic analysis was performed to provide design data for a double-effect absorption heating system. A comparative study of the water-LiBr-LiSCN mixture against the water-LiBr pair was conducted by a computer simulation. The computer simulation is based on mass, material and heat balance equations for each part of the system. Coefficients of performance and flow ratios for effects of different operating temperatures are investigated. It is found that the heating COP is higher for the water-LiBr-LiSCN mixture than for the water-LiBr pair, and FR is lower for the former.

• 복식
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• 제55권2호
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• pp.45-57
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• 2005

The creative fashion design is the technique which ran be obtained through the structural analysis of the relationship between principle, element-combination and idea-expression. In the research, as the results of theoretical survey of design structure and idea-expression, the structural and subjective designs are classified and defined: a. the structural design is analyzed with the existing examples based on the combinational Idea-expression of the O.C.L method, and b. the subjective design is also analyzed connecting the real examples to Cordon method, Synetic method, Association method, and expansive idea-expression-method obtained by the Experiences of Geometrical Combinations. The research can be summarized as follows: 1. The creative fashion design which emphasizes the geometrical structure utilizes the modification method whirh combines the shapes and constructs extraordinary structural beauty coming from the complex structural principle, that is, emphasis and balance. 2. The creative fashion design which emphasizes specific subjects utilizes the modification method which mimics representative and plastic resemblances and constructs symbolic structural beauty coming from the simple structural principle, that is, material elements.