• Transactions of the Korean Society of Mechanical Engineers B
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• v.39 no.2
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• pp.125-134
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• 2015

This is the third paper on the combustion characteristics of the landfill gas in a constant volume combustion chamber for a large displacement volume commercial engine. It is the first in this series to discuss the effects of the torch device on combustion. The results show that an optimum orifice ratio exists regardless of the torch volume, and a few adverse effects on the combustion are observed for an excessively small orifice ratio. In addition, the torch ignition decreases the initial burn duration, and the decrease in the heat transfer caused by this decreased duration contributes to an increase in the peak combustion pressure. Finally, the torch mostly plays a positive role in shortening the main burn duration when the combustion condition is worsened by a lower methane fraction. Yet, the torch decreases the initial burn duration rather than the main burn as the methane fraction increases.

• Proceedings of the Korean Institute of Interior Design Conference
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• 2007.05a
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• pp.231-236
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• 2007

The aspects of contemporary society change have been changed rapidly running for function value on the part of part industrialization and information-oriented. The transfer to the society focused on a human being emphasis and symbol value is in progress rising with natural desire of recurrence of human nature accordingly and desires of a human being inborn of sensitivity-oriented and pluralism-oriented are being expressed. Answering these social and cultural demands, concerns about an arbitrary mind world of a human being and pursuit dispositions about impractical and transcendental world are coincided with to the purpose and so various kinds of expressions except for art sphere are being experimented and applied. Here upon also in the field of the contemporary interior design, answering sensual desire of users, various arts and cultural tendency, the concept of surrealism is being applied in design introducing the concept of surrealism positive. And fantastical and unreasonable expression features of surrealism are being used as subjective essential elements to make new spaces. Especially amoung various kinds of the interiors designs, the features like surrealistic expressions in Food & Beverage Space which proper identity and strong symbolism will be expressed can be recognized as appropriate expression patterns to give still more sensitivity stimuli to customers. Thus this research disclosed conceptual and ideological background of surrealism and also analyzed and studied surrealistic expression features applied to the interiors designs of Contemporary Food & Beverage Space through expression disposition, study and classification of techniques. And standing on the result of analyzing surrealistic expression features of Contemporary Food & Beverage Space with a key word of expression features derived we groped for estatescape trend demanded in Food & Beverage Space and direction coming.

• Journal of Korean Society of Environmental Engineers
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• v.33 no.9
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• pp.692-700
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• 2011

The use of electric field has been studied as an alternative for biofilm control dominated by disinfectants and antibiotics. This technology would be advantageous in the environmental respect that biofilm can be controlled based on electron transfer, not using chemical disinfectants and antibiotics. Control mechanisms which were reported by earlier studies are organized as; (1) bacterial adhesion control by electrostatic repulsion at a negative current, (2) bacterial adhesion control using bacterial motion and (3) bacterial inactivation by direct oxidation at a positive current, (4) bioelectric effect leading to biofilm inactivation. In this review article, we summarized the technologies for biofilm control using electric field and provided some application examples from previous studies.

• Journal of Korea Technology Innovation Society
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• v.20 no.3
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• pp.664-683
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• 2017

The technology transfers from public institutions have positioned themselves as knowledge conduits for stimulating firms' capabilities under 'catching-up' economy paradigm. While this view is still relevant, the policy for public technology needs to be extended to a more marketoriented way. This study explores how public technology affects the financial performance of demanding companies by comparing the revenues and profits of 'technology commercialised group (TC)' and 'in-house research group (InR)'. The estimation results by hierarchy regression suggest that the size and the patents of TC firms have a more influential impact than InR group, although the ratio of maintaining research staff was reported an inverse relation. The contribution to the operating profit seems to be indifferent between the groups. The positive impact of public technology over the firm's performance is highly related to the technology commercialisation capability, signalling that the aim of technology transfer needs to gear toward the enhancement of commercialising capabilities rather than the promotion of technology transactions.

• Knowledge Management Research
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• v.5 no.2
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• pp.1-23
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• 2004

Knowledge sharing, as well as knowledge creation, is the basis for an organization to maintain its competitive advantage. Organizations trying to use knowledge resources for strategic purposes or pursuing knowledge management are now paying more attention to methods to facilitate knowledge sharing. This study aims to find out the answers to the questions below. (1) Which relational or structural factors influence the intentions to share knowledge among groups? (2) Does the intension to share knowledge among groups really influence the knowledge sharing behavior? (3) What are the roles of accessibility on the relationship between intention to share knowledge and behavior of knowledge sharing? (4) Does the behavior of knowledge sharing really improve the effectiveness of knowledge sharing among groups? Findings of this study are summarized as follows. First, the positive relations of the relational and structural factors with the intention to share knowledge among groups are found. However, crisis intensity was found to have no meaningful influence on the intention to share knowledge among groups. After all we could see through additional analysis that it is in curvilinear relation, not linear relation. Second, we examined relation of the intention to share knowledge with the behavior of knowledge sharing among groups. Multiple regression analysis showed that intention to share knowledge among groups had a statistically significant influence on the behavior of knowledge sharing among groups. Third, the moderating effect of accessibility on the relation between the intention to share knowledge and the behavior of knowledge sharing was found to be statistically significant. Fourth, the relation between behavior of knowledge sharing and the effectiveness among groups was found to be statistically significant, but in a negative direction. The findings imply that the quantity of knowledge sharing does not always lead to the effectiveness of knowledge sharing.

• Journal of the Korean Institute of Educational Facilities
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• v.19 no.5
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• pp.3-10
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• 2012

In recent times, education facilities for children have focused on the importance of the "living environment" of children. This is because children have a more sensitive response than adults in their lives. All of the field activities, body movement, and play they go through in their living environment exhibit a great educational effect while promoting their emotional, physical, and mental development; therefore, these are the main priority factors in planning an education facility for children. A space may be deemed to be created by the relationship between objects and the people who perceive them. Also, space cognition may be defined to be made of the perception of a space, integration with experience, and restructuring. Physical factors and visual factors, which are the basic factors composing a space, either play their roles as independent variables in a space or form a relationship through a combination between the factors; thereby, diverse types of space experiences may be created. Space experience may be realized through the "movements" of a user, and a user selectively experiences a space through his/her voluntary movements, while experiencing the space against their will through flexible movements. In particular, space experience through movements has an effect on children in terms of making them feel like having daily exploration, and it also has a positive effect on education. A movement space in which "movements" appear most strongly in an education facility for children connects various nearby spaces, and it also portrays a transfer role. Furthermore, in this space, a variety of space changes can be found; thereby, children are able to have diverse selective space experiences.

• Journal of Labour Economics
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• v.40 no.4
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• pp.33-59
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• 2017

In this paper, we describe the economic model of Becker's demand for child and examine whether the number of children and spending on private education in Korea can be explained by this model. The results show that household income has no significant effect on the number of children but has a significant positive effect on the spending on private education per child. These results suggest that the low fertility rate in Korea may increase the demand of parents for the quality of their children due to the increase of household income. And the higher the household income, the parents' education level and the child's age, the higher the spending on private education per child. These results show that there is a possibility of education and wealth transfer between parents and children through educational investment.

• Archives of Pharmacal Research
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• v.20 no.4
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• pp.297-305
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• 1997

A new serum-free defined medium was developed that supports the growth of normal rat mammary epithelial cells. Mammary organoids from the glands of female F344 rats were cultured in a serum-free medium. Monolayer culture colonies developed within a week and remained viable for months in culture. Upon subculture of one-week-old primary colonies, almost the same morphology of colonies was developed. The scrape loading/dye transfer technique showed that most of colonies that developed in a serum-free medium containing EGF, human transferrin, insulin, and hydrocortisone (basal serum-free medium, BSFM) failed to show cell-cell communication. However, colonies cultured in BSFM supplemented with prolactin, $E_2$, and progesterone (complete hormone serum-free medium, CHSFM) showed cell-cell communication at 14 days of primary culture or of subculture. By flow cytometry with FITCPNA and PE-anti-Thy-1.1 monoclonal antibody, we distinguished four RMEC subpopulations in cultures in both media: Thy-1.1+ cells, PNA+ cells, cells negative to both reagents and cells positive to both reagents. It is likely that combined prolactin, cortisol, and insulin in CHSFM stimulate terminal differentiation of clonogenic cells.

• The Journal of Korean Institute for Practical Engineering Education
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• v.3 no.1
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• pp.119-126
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• 2011

This study analyzed the effect of the competency factors (resources and education competency)on the performance of university-industry cooperation by characteristic of universities through multiple regression model using 202 datasets empirically. The input factors variables used in a research model were characteristics of universities (research oriented/education-oriented universities and public/private universities) and competency factors (resource competency and education competency) of university-industry cooperation. The performance factors of university-industry cooperation were composed of the outcomes of intellectual knowledge asset, technology transfer, spin-off and financial profits. The empirical results show that research-oriented universities and public universities produce a uniter performance of university-industry cooperation than education-oriented universities and private universities, respectively and the competency factors of university-industry cooperation such as resource and education competency also have a positive effect on the performance of university-industry cooperation.

• The Journal of Korean Medicine
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• v.35 no.2
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• pp.1-11
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• 2014

Objectives: To evaluate the effect of acupuncture as an adjunct treatment to increase the success rate of in vitro fertilisation (IVF). Methods: A review of the English and Korean literature was conducted to identify studies on acupuncture as an adjunct treatment to IVF. The main outcome measures were the biochemical pregnancy rate (BPR), the implantation rate (IR), the clinical pregnancy rate (CPR), the miscarriage rate (MR), the on-going pregnancy rate (OPR) and the live birth rate (LBR). Results: Nine meta-analyses of 11 systematic reviews (SRs) were included in this review. In four SRs, the overall IVF outcomes regardless of the procedural steps were documented; two of these SRs reported a significant effect on the CPR. One SR reported that acupuncture at the time of controlled ovarian hyperstimulation had a significant effect on the BPR. Seven SRs reported that acupuncture had no significant impact on transvaginal oocyte retrieval (TVOR). In eight SRs, significant impacts on the CPR, LIBR and OPR were reported when acupuncture was performed around the time of embryo transfer (ET). The results of repeated acupuncture after ET were included in two SRs, which included the same primary studies. The results of the SRs showed that acupuncture had a positive effect on the CPR. Conclusions: When the complete IVF procedure is analysed, there is conflicting evidence in that some reviews have found that acupuncture leads to an increased CPR but others have not. In addition, the reviews presented no evidence to suggest that acupuncture has any specific risks.