• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 추계학술대회
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• pp.851-856
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• 2003

A cross-flow fan consists of an impeller, a stabilizer and a rearguider. When it applied for an air conditioner, an evaporator should be added. It relatively makes high dynamic pressure at low speed because a working fluid passes through an impeller blade twice and blades have a forward curved shape. Therefore, the performance of a cross-flow fan is influenced 25% by the impeller, 60% by the rearguider and the stabilizer, 15% by the heat exchanger. At the low flow rate, there are a rapid pressure head reduction, a noise increase and an unsteady flow against a stabilizer and a rearguider. Moreover, the reciprocal relation between the impeller and the flow passage is the important factor for performance improvement of the cross-flow tan because each parameter is independent. The performance characteristics in the cross-flow fan are graphically depicted with various impeller outlet angles and rearguiders.

• 한국의류학회지
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• 제28권2호
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• pp.224-234
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• 2004

This paper is an exploratory research to identify the structural model suitable for the fashion brand attitude effect process of VMD structural elements. Under the circumstances of severe competitiveness in price-conscious casual brand, we intended to find measurement model of VMD effect to establish plausible brand specific VMD strategy. Since VMD is regarded as one of marketing stimuli like advertising, we introduced Mackenzie, Lutz, and Belch(1986)＇s advertising effect measurement model for the analysis. For the study, VMD structural elements were composed of controllable visual factors from store environment at the aspect of marketing strategy. As a result, the reciprocal mediation hypothesis model shows the best fit for the VMD stimuli. That is, under the cognition of interaction between VMD attitude and brand attitude, strategy must be considered to strengthen the attitude relation between VMD and brand. The second fit model was the dual mediation model which was adopted from Petty and Cacioppo＇s ELM. According to this, when you make use of VMD strategy, it is needed to consider both of affective and cognitive factors of VMD.

• 한국분무공학회지
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• 제3권1호
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• pp.19-26
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• 1998

The effect of mixture component makes a nelay time and a long total combustion period $\tau_{p\;max}$. The flame propagation delay $\tau_{df}$ was determined by the record of current ion. The pressure release delay $\tau_{dp}$ and $\tau_{p\;max}$ were determined by the indicated pressure diagram in constant volume of the combustion chamber. The results are as follows: 1) The ignition delay $\tau_t$ time takes the minimum value around $\Phi=1.15$. 2) $\tau_{df}$ and $\tau_t$ time increased according to the increases of the concentrated dilution gases, because the adiabatic flame temperature decreased due to the increases of the heat capacity. But dilution gases have little effect on flame nucleus formation delay 3) The relation between $\tau_t$ time and reciprocal laminar burning velocity is almost linear. 4) The increase of the propagation length is accompanied with increased ratio of the $\tau_{df},\;\tau_{dp},\;\tau_{t},\;\tau_{p\;max}$.

• 한국유체기계학회 논문집
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• 제7권4호
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• pp.7-15
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• 2004

The design point of the cross-flow fan is generally based on the region within low static pressure and high flow rate. It relatively makes high dynamic pressure at low speed because a working fluid passes through an impeller blade twice. However, it has low static pressure efficiency between $30\%$ and $40\%$ because of relative high impact loss. The purpose of this study is to research the reciprocal relation among each parameter. Experiments and numerical analyses are conducted on effects of a stabilizer and a rearguider on performance analysis of a cross-flow fan. Two-dimensional, unsteady governing equations are solved using FVM, PISO algorithm, sliding grid system and standard $k-{\epsilon}$ turbulence model. Experiments are also carried out to estimate the performance of the modeled cross-flow fan. It is clarified that the rearguider of Archimedes type has excellent results for the most part.

• 산업경영시스템학회지
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• 제22권51호
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• pp.11-19
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• 1999

This study intends to define $\ulcorner$personality$\lrcorner$ as $\ulcorner$Human-ware$\lrcorner$ based on $\ulcorner$Gene-ware$\lrcorner$ in business management. The sides of personality in management are important source of manifestation of ‘Synergy’, because the importance of personality, that is, $\ulcorner$attitude$\lrcorner$ in individuals is increasing compared with the traditional techniques, $\ulcorner$craft$\lrcorner$. In this work it is considered that Human-ware activates interchange in reciprocal relation between Gene-ware and Hard-ware and performs balancing, intermediating (catalyzing) functions in relative that things(Geneware $\leftrightarrow$ Humanware $\leftrightarrow$ Hardware). $\ulcorner$Gene-ware$\lrcorner$ represents factor and phenomena of life in evolutionary information as human instincts, system of Gene-duum(Gene＋Residuum(in phenomenology) ), Synchronization(in structuralism). In this view, this paper defines the concepts and effects of personality in management as the results of creative and stational functions of Human-ware. And this paper intends to identify the strata of psycho in human as three vertical aspects of $\ulcorner$Manifest$\lrcorner$, $\ulcorner$Latent$\lrcorner$, and $\ulcorner$Found$\lrcorner$, in this respects, function of Human-ware have analogy to that of Manifest in psychological behaviors. Finally, reviewing the Ford system based on Fordism and Taylor's system in Industrial Engineering, pursues the meaning and importance of personality, that is Humanware in management.

• 대한간호학회지
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• 제33권4호
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• pp.495-502
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• 2003

Purpose. This ethnography is aimed at describing the care-giving practices of the nuclear family and relatives of the elderly within a clan village in relation to their socio-cultural context. Four basic notions of the study came from Leininger's culture care theory and the nurse-client negotiation model of Anderson. In order to understand the cultural system of caring, the following questions were explored: What caring behaviors are performed for the elderly person in a clan and how do these behavior relate to the various components of that particular culture\ulcorner Method. Data for this study was gathered through twenty-one fieldwork expeditions between September 1994 and December 2002 using interviews and participant observation of 7 families drown from two extended families. Data was analyzed using the techniques of taxonomy, value, and proxemics analysis. Findings. The socio-cultural context of caring for elderly people, their caring values, and four categories of caring were explored. Values of caring and every day life in the clan were hierarchical, reciprocal, and collective. The four categories of caring were: being with, empowering, keeping territory, and enhancing spirituality. Conclusions. The results of this study can be used to understand culture-specific care and to provide culturally congruent care for the elderly in a clinical setting.

• Nuclear Engineering and Technology
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• 제54권5호
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• pp.1835-1844
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• 2022

Single-orifice plate is wildly utilized in the piping system of the nuclear power plant to throttle and depressurize the fluid of the pipeline. The cavitation induced by the single-orifice plate may cause some serious vibration of the pipeline. This study aims to find the optimal designs of the single-orifice plates that may have weak cavitation possibilities. For this purpose, a new single-orifice plate with a convergent-flat-divergent hole was modeled, a multi-objective optimization method was proposed to optimize the shape of a single-orifice plate, while computational fluid dynamics method was adopted to obtain the fluid physical quantities. The reciprocal cavitation number and the developmental integral were treated as cavitation indexes (e.g., objectives for the optimization algorithm). Two non-dominant designs ultimately achieved illustrated obvious reduction in the cavitation indexes at a Reynolds number Re = 1 ×10⁵ defined based on fluid velocity. Besides, the sensitivity analysis and temperature effects were also performed. The results indicated that the convergent angle of the single-orifice plate dominants the cavitation behavior globally. The optimal designs of single-orifice plates result in lower downstream jet areas and lower upstream pressure. For a constant Reynolds number, the higher temperature of liquid water, the easier it is to undergo cavitation. Whereas there is a diametric phenomenon for a constant fluid velocity. Moreover, the regression models were carried out to establish the mathematical relation between temperature and cavitation indexes.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제17권2호
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• pp.106-113
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• 2006

Objectives : The purpose of this study was to investigate the adult attachment style characteristics of mothers with selective mutism children and their relations to selective mutism. Methods :The subjects of this study were 15 mothers with selective mutism children who were diagnosed by DSM-IV criteria at psychiatry outpatient department of Kyungpook National University Hospital from March 1998 to February 2005. The controls of this study were 30 mothers with normal children who are in the second grade of elementary school in Daegu. We assessed the adult attachment style characteristics of these mothers by Revised Adult Attachment Scale, and Reciprocal Attachment Questionnaire-Korean version, self-report attachment style questionnaire. Results : 1) On the self-report attachment style questionnaire, it revealed that mothers with selective mutism children had both of the secure and the dismissing-avoidant types predominantly and the tendency that mothers with selective mutism children more commonly had dismissing-avoidant type than controls did. 2) On the comparison of attachment quality of mothers, although only the anxiety subscale difference was significant, it revealed that mothers with selective mutism children had generally lower score pattern in all of closeness, dependence and anxiety subscale than controls did. It was consistent with the consequence of self-report attachment style questionnaire in this study. Conclusion : This study showed that the distribution of adult attachment style of mothers with selective mutism children was different from those of controls. The dismissing-avoidant attachment style was predominant in mothers with selective mutism children. we suppose the possibility that the dismissing-avoidant attachment style of mothers with selective mutism children has relation with selective mutism.

• 콘크리트학회논문집
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• 제13권1호
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• pp.69-76
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• 2001

현장타설 경량기포콘크리트는 경량성, 단열성, 흡음성, 시공성, 경제성 등이 우수하여 온돌바닥의 단열용 또는 채움용으로 사용되고 있다. 그러나, 경량기포콘크리트의 품질확보를 위한 세부기술개발이 미흡하여, 현장에서의 품질관리방법을 정립할 필요가 있으며, 이를 위하여 경량기포콘크리트의 물리적 성질 및 상호관계에 대한 구명이 요구된다. 본 연구는 시멘트 중량의 40%를 플라이애시로 치환한 FA기포콘크리트를 온돌 채움용으로 사용할 경우의 품질관리 방안을 확립하기 위한 것으로서, 굳지 않은 경량기포콘크리트의 플로우, 기포슬러리 비중, 기포율 간의 상호관계 및 경화전 물성과 경화후 물성(겉보기 비중, 28일 압축강도) 간의 상호관계를 구명하였으며, 7일 압축강도를 이용하여 28일 압축강도를 조기에 추정하기 위한 관계식을 제시하고, 또한 현장타설용 기포콘크리트에 대한 KS 규격 개선안을 제시하였다.

• Journal of Genetic Medicine
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• 제2권1호
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• pp.41-47
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• 1998

Human uniparental gestations such as gynogenetic ovarian teratomas provide a model to evaluate the integrity of parent-specific gene expression - i.e. imprinting - in the absence of a complementary parental genetic contribution. The few imprinted genes characterized so far include the insulin-like growth factor-2 gene (IGF2) coding for a fetal growth factor and H19 gene whose normal function is unknown but it is likely to act as an mRNA. IGF2 is expressed by the paternal allele and H19 by the maternal allele. This reciprocal expression is quite interesting because both H19 and IGF2 genes are located close to each other on chromosome 11p15.5. In situ RNA hybridization analysis has shown variable expression of the H19 and IGF2 alleles according to the tissue origin in 11 teratomas. Especially, Skin, derivative of ectoderm, is expressed conspicuously. We examined imprinting of H19 and IGF2 in teratomas using PCR and RT-PCR of exonic polymorphism. H19 and IGF2 transcript could be expressed either biallelically or monoallelically in the teratomas. Biallelic expression (i.e., loss of imprinting) of IGF2 occurred in 5 out of 6 mature teratomas and 1 out of 1 immature teratoma. Biallelic expression of H19 occurred in 4 out of 10 mature teratomas and 1 out of 1 immature teratoma. Expression levels of H19 and IGF2 transcript using the semi-quantitative RT-PCR had no relation between monoallelic and biallelic expression. Moreover, IGF2 biallelic expression did not affect allele-specificity or levels of H19 expression. These results demonstrate that both genes, H19 and IGF2, can be imprinted, expressed and regulated independently and individually of each other in ovarian teratoma.