• Earthquakes and Structures
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• 제15권2호
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• pp.123-132
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• 2018

In this paper the strain energy density (SED) model is used to analyze the seismic behavior of suspen-domes and a new criterion is established for judging the seismic failure based on a characteristic point in the SED model. Firstly, a nonlinear time-history response analysis was carried out using the finite-element package ANSYS for typical suspen-domes subjected to different ground motions. The seismic responses including nodal displacements, ratios of yielding members, strain energy density and structural maximum deformation energy were extracted corresponding to the increasing peak ground acceleration (A). Secondly, the SED sum ($I_d$) was calculated which revealed that the $I_d-A$ curve exhibited a relatively large change (called a characteristic point) at a certain value of A with a very small load increment after the structures entered the elastic-plastic state. Thirdly, a SED criterion is proposed to judge the seismic failure load based on the characteristic point. Subsequently, the case study verifies the characteristic point and the proposed SED criterion. Finally, this paper describes the unity and application of the SED criterion. The SED method may open a new way for structural appraisal and the SED criterion might give a unified criterion for predicting the failure loads of various structures subjected to dynamic loads.

• 토지주택연구
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• 제8권3호
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• pp.123-130
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• 2017

This study aims to empirically verify the impacts of career learning on employability and the mediating effect of job expertise in a public corporation. For the empirical analysis, I surveyed 958 employees(valid respondents) working in a public corporation. And the structural equation modeling(SEM) was used to statistically analize and test the research hypotheses. The independent variable is 'career learning', the dependent variable is 'employability' and the mediating variable is 'job expertise'. The results are as follows. The empirical analysis shows that the positive effects of 'career learning ${\rightarrow}$ job expertise', 'job expertise ${\rightarrow}$ employability' and 'career learning ${\rightarrow}$ employability' are all verified. And the mediating effect of job expertise between career learning and employability is also partially verified. So, all the proposed hypotheses are accepted. From this result, I can clearly suggest that the employees can be growing to professionals with high employability when they retire if they are voluntarily and self-motivated to set up their career plan and to enhance their job expertise. In this context, it is expected that the company should support the employees to continue to strengthen their own expertise in their job place through their mid-long term career learning plan.

• Toxicological Research
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• 제26권2호
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• pp.123-130
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• 2010

The effect of DHU001, a mixed herbal formula consisted of 7 types aqueous extracts for various respiratory disorders were evaluated on 2,4-dinitrofluorobenzene (DNFB)-induced contact dermatitis, type I allergic model. Contact dermatitis was induced by sensitization with dinitrophenyl-derivatized ovalbumin (DNP-OVA) and DNFB challenge as antigen. Two different dosages of DHU001 (300 and 150 mg/kg) were orally administered to DNP-OVA sensitization mice once a day for 7 days with reference material, dexamethasone (15 mg/kg, intraperitoneal treatment). End of 7 days oral administration of DHU001 extracts or intraperitoneal treatment of dexamethasone, the changes on the edematous changes and scratching behavior were measured. Immediate after DNFB challenge on ear or paw of DNP-OVA sensitized mice, increases of ear and paw thicknesses and weights were detected with anterior ear skin (dermis to epidermis) thickness and paw scratching behavior increases. However, these contact dermatitis signs induced by DNFB treatment were reduced by treatment of the both different dosages of DHU001 and dexamethasone, respectively. The results obtained in this study suggest that oral treatment of DHU001 extracts also has relatively favorable effects on contact dermatitis.

• 대한건축학회논문집:계획계
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• 제34권12호
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• pp.123-134
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• 2018

The purpose of this study was to analyze the space of upper class housing in Andong through the oral life history of women in terms of sexual life. Even though the living was centered on women, the women of Joseon were alienated from the history. For this reason, the life history of head family housing was not recorded in the language of women, and often passed on orally. Also sexual life is a important part in daily life, but it is hard to be recorded or mentioned in Confucian society, and there is not much space research related to sexual life. Now there is not a lot of head family housing left, and the number of people who can tell the life history which is not recorded and the storyteller is also decreasing. From now on, I will record what I have experienced or passed through interviews of the residents living in head family housing and then analyze the characteristics of the sexual life.

• Ocean Systems Engineering
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• 제13권2호
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• pp.123-146
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• 2023

In this paper, Moore-Gibson-Thompson theory of thermoelasticity is considered to investigate the fundamental solution and vibration of plane wave in an isotropic photothermoelastic solid. The governing equations are made dimensionless for further investigation. The dimensionless equations are expressed in terms of elementary functions by assuming time harmonic variation of the field variables (displacement, temperature distribution and carrier density distribution). Fundamental solutions are constructed for the system of equations for steady oscillation. Also some preliminary properties of the solution are explored. In the second part, the vibration of plane waves are examined by expressing the governing equation for two dimensional case. It is found that for the non-trivial solution of the equation yield that there exist three longitudinal waves which advance with the distinct speed, and one transverse wave which is free from thermal and carrier density response. The impact of various models (i)Moore-Gibson-Thomson thermoelastic (MGTE)(2019), (ii) Lord and Shulman's (LS)(1967) , (iii) Green and Naghdi type-II(GN-II)(1993) and (iv) Green and Naghdi type-III(GN-III)(1992) on the attributes of waves i.e., phase velocity, attenuation coefficient, specific loss and penetration depth are elaborated by plotting various figures of physical quantities. Various particular cases of interest are also deduced from the present investigations. The results obtained can be used to delineate various semiconductor elements during the coupled thermal, plasma and elastic wave and also find the application in the material and engineering sciences.

• 철학연구
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• 제123호
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• pp.239-264
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• 2018

덕인식론과 지행론의 전체적인 구도를 이해하기 위한 선행 과제로서 나는 이 글에서 덕(德)과 관련한 개념들 가운데 역량과 성품이 지적 덕성과 어떤 연관에 놓여 있는지 정리하고자 한다. 애초 이 글은 똑똑하다고 칭찬받는 사람들이 왜 나쁜 일들을 스스럼없이 저지르는가에 대한 소박한 의문에서 출발한다. 이런 의문은 윤리적인 문제일 수도, 인식론적인 주제일 수도 있다. 왜냐하면무엇을 어떻게 인식할 것인가라는 인식론적인 질문은 결국 인식론이 규범적인영역에 속하며 인식론적인 평가에서 지적인 행위자와 그 공동체를 중시해야 한다는 것을 의미하기 때문이다. 이것은 '덕인식론'의 핵심적인 관점이다. 지식의정당화에 있어서 덕인식론이 '덕성'에 초점을 맞추고 있다는 점은 동아시아 전통의 '지행론'과 닮았지만 그 문제의식은 다르다. 따라서 덕인식론과 지행론의같고 다른 점을 우선 살펴보고 "논어"를 중심으로 역량, 성품, 지적 덕성의 관계를 검토할 것이다. 이 작업에서 나는 역량과 성품이 규범적인 가치의 문맥으로 조율되지 않으면 올바른 행위를 산출하는 지적 덕성이 되기에 부족함을 말할 것이다.

• 한국세라믹학회지
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• 제45권5호
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• pp.297-302
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• 2008

To direct the evolution of nanostructure and immobilize ${\gamma}-Al_2O_3$ catalyst, nanocrystalline La-doped-$Al_2O_3$ powder were prepared by the sol-gel process with addition of an amphiphilic block copolymer template (pluronic P123: $(poly(ethyleneoxide)_{20}-poly(propyleneoxide)_{70}-poly(ethyleneoxide)_{20})$. The dried gel is amorphous, whereas heating at temperature above $700^{\circ}C$ leads to the formation of nanocrystalline ${\gamma}$ and ${\delta}-Al_2O_3$ and these two phases is kept until $1100^{\circ}C$. ${\alpha}-A1_2O_3 $starts to form at $1200^{\circ}C$ with $LaAl_{11}O_{18}$. The surface morphology and crystal structure has been observed by field emission scanning electron microscope (FE-SEM) and X-ray diffraction (XRD). Solid state $^{27}Al$ MAS NMR indicates two types of local environment, i.e. octahedral and tetrahedral sites. The surface area and pore size was compared among these powders using the BET nitrogen adsorption measurements.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 추계학술대회 논문집 전력기술부문
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• pp.151-154
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• 2004

본 논문에서는 IEEE123 모선 배전계통에 분산전원 투입이 가능하도록 GUI 조류계산프로그램 개발하였다. 첫째로 제안된 배전용 조류계산 프로그램은 기존의 배전용 조류계산의 한계를 벗어나 분산전원을 투입을 가능하게 하고 비주얼하게 온라인으로 배전계통의 구조를 컴퓨터 마우스 클릭으로 손쉽게 할 수 있도록 구성하였다. 둘째로 GUI부분에서 모선, 선로, 차단기의 정보를 표시할 수도 있고 사용자가 분산전원의 투입이나 차단 그리고 선로 및 부하의 투입 및 차단이 가능하도록 하였다. 개발된 프로그램은 데이터 변환기, 조류계산프로그램 및 GUI로 구성되어 있으며 이 3부분은 메시지 Queue 명령에 의하여 서로 메모리를 공유하도록 되어있다. 분산전원 투입 및 차단은 4군데로 지정하여 분산전원 투입량의 효과를 시각적으로 표시하는 데 편하도록 되어 있다. 조류계산의 결과는 GUI상에 유효전력, 무효전력, 모선전압, 역률을 각 모선의 근접 위치에 나타낸다.

• 한국국방경영분석학회지
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• 제4권1호
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• pp.113-123
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• 1978

Consider a series system of two units, named 1 and 2, respectively. Two units are observed at the beginning of discrete time periods t=0,1,2, $cdots$ and classified as being in one of a countable number of states. Let (i, r) be a state of the system at time t, when the state of unit 1 is i and state of unit 2 is r at time t, Under some conditions, the opportunistic replacement policy that minimizes the expected total discounted cost or the average cost of maintenance is shown to be characterized by the control limits $i^{*}(r)$ (a function of r) and $r^{*}(i)$ (a function of i) : (a) in observed state (i, r), the optimal policy for unit 1 is to replace if $i{\ge}i^{*}(r)$ and no action otherwise; (b) in observed state (i, r), the optimal policy for unit 2 is to replace if $r{\ge}r^{*}(i)$ and no action otherwise. In addition, this paper also develops optimal policy in the finite time horizon case, where time horizon is fixed or a finite integer valued r.v. with known pmf.

• 한국미생물·생명공학회지
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• 제23권2호
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• pp.123-130
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• 1995

DNA topoisomerase I have been shown to be important therapeutic target in cancer chemotherapy. Chemotaxonomy and numerical identification were carried out for an isolate strain No.7489 producing an antibiotic that inhibits DNA topoisomerase I activity. The genus of strain No.7489 was determined as Streptomyces sp. from culture, morphological and chemotaxonomic data. Thirty-nine taxonomic unit characters were tested and the data were analyzed numerically using the TAXON program. The isolate was best matched to Streptomyces melanosporofaciens in the major cluster 32 of Streptomyces. Therefore, it was concluded that the isolate was identified to be a member of Streptomyces melanosporofaciens.