• Journal of the Computational Structural Engineering Institute of Korea
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• v.30 no.3
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• pp.265-274
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• 2017

This study presents a sustainable design method to optimize the embodied energy and $CO_2$ emission complying with the design code for reinforced concrete column. The sustainable design method effectively achieves the minimization of the environmental load and energy consumption whereas the conventional design method has been mostly focused on the cost saving. Failure of reinforced concrete column exhibits compressive or tensile failure mode against an external force such as flexure and compression; thus, optimization analyses are conducted for both failure modes. For the given sections and reinforcement ratios, the optimized sections are determined by optimizing cost, embodied energy, and $CO_2$ emission and various aspects of the sections are thoroughly investigated. The optimization analysis results show that 25% embodied energy and 55% $CO_2$ emission can be approximately reduced by 10% increase in cost. In particular, the embodied energy and $CO_2$ emission were more effectively reduced in the tensile failure mode rather than in the compressive failure mode. Consequently, it was proved that the sustainable design method effectively implements the concept of sustainable development in the design of reinforced concrete structure by optimizing embodied energy consumption and $CO_2$ emission.

• Management & Information Systems Review
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• v.33 no.4
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• pp.21-38
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• 2014

This study investigates whether and how a firm's cost of equity is influenced by the extent of a firms's name change. Even though corporate name change doesn't give any benefit to investors, it can be a signaling about firm's future valuation. And also, if that signaling has high credibility, it can be decrease information cost and the firm's cost of equity. on the contrary to this, if corporate name change is kind of break with the past and corporate image laundering, it is bad signaling to investors. So it can be increase information risk and the firm's cost of equity. Using yearly cross-sectional regressions of the cost of equity on our proxies for corporate name change, size, beta, market-to-book ratio and other innate risk factor over the 2005-2010, we find that the cost of capital is positively associated with corporate name change after controlling for all other factors. This result implies that corporate name change increase information risk of the business, and thus increase information asymmetries between managers and outside investors with respect to a firm's true future value. This increases information risk, and creates an adverse selection problem, on the part of outside investors. Rational investors therefore demand a premium for bearing this corporate name change-related information risk, which in turn leads us to observe a positive relation between the intensity of corporate name change and the cost of equity.

• Journal of Korean Home Economics Education Association
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• v.20 no.3
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• pp.65-84
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• 2008

Historically the value of the secondary Home Economics subject matter has been justified with the extrinsic aim to satisfy the needs of the individual and family and of the society. The purpose of this study is to investigate the educational and philosophical significance of the knowledge in Home Economics education through reasoning out its intrinsic aim. From the point of discipline-based curriculum, Home Economics as 'the structure of knowledge' constitutes the curriculum of the secondary Home Economics subject matter and contributes to understanding the family life intellectually with its unique perspective. When students understand these theoretical contents, they will internalize the core idea of Home Economics so that their cognitive perspective on family life is developed or widened. With this cognitive perspective, they are able to discover the aspect of family life from their daily life, to interpret and judge every situation properly. It is the presupposition of socially expected practical problem solving that makes Home Economics education intrinsically meaningful. In conclusion, the secondary Home Economics curriculum needs to be reinterpreted or reorganized as the structure of knowledge, not as fragmentary informations or facts, through which the broad cognitive perspective on family life is developed and Home Economist's mode of thinking is transmitted.

• Journal of the Korean Society of Earth Science Education
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• v.17 no.2
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• pp.102-122
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• 2024

The aim of the study is to explore how to approach the inherent value of nature, which is the main object of earth science education, beyond its instrumental value, which is its external usefulness. Above all, it is said to be an activity-based inherent value in the entire transfer process of the experiment, which includes psychological elements. At the core of environmental ethics is value and the utilitarian question of what is worth continuing. It is a matter of more than simply continuation. The answer is the sustainable value of the natural environment, an education that must preserve its beauty as an inherent value, that is, as a heritage value as a lover of life. Furthermore, the area of valuation must be upgraded from synchronic to diachronic ethical values, with sustainable values instead of intrinsic values. In environmental ethics, the intrinsic value that shows the beauty of knowledge itself is called bequest value. The study distinguished between a priori intrinsic value that ignores existing experience and intrinsic value that is experience-oriented and activity-oriented. In addition, the intrinsic value principle centered on activities was explored through scientific experiments in earth science education and Eratosthenes's earth size measurement experiment. The value principle according to the scientific worldview serves as the basis for value judgment. Above all, intrinsic value was being revealed through the active value experience of the experiment, in which aesthetic values were involved in the process of inferring the experiment results. As an educational implication, it should be value-education that helps us internally transfer intrinsic values rather than instrumental values, which are the basis for creating a sustainable society and nature.

• Journal of the Korean Society of Propulsion Engineers
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• v.16 no.5
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• pp.67-73
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• 2012

Failure mechanisms for a solid propellant were discussed, and the stip-yield and the inherent flaw models were applied to them. Then, failure assessment diagram methods were investigated by means of modified two models. Fracture toughness tests using CCT(center-cracked tension) specimens made of a solid propellant were conducted to generate the failure assessment diagrams. The failure assessment diagram of the inherent flaw model was normalized in order to compare with that of the modified strip-yield model. From the comparison of two failure assessment diagrams, it was found that the failure assessment diagram of the modified inherent flaw model more conservatively assesses the failure than that of the modified strip-yield model.

• Journal of Korea Society of Industrial Information Systems
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• v.10 no.4
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• pp.1-15
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• 2005

This study investigates the relationships between extrinsic motivation (perceived usefulness), intrinsic motivation (perceived ease of use and perceived enjoyment), and attitude toward online community. With 252 valid responses, the research hypotheses are tested using by structured equation model. The results show that perceived ease of use affects perceived usefulness and perceived enjoyment, that perceived enjoyment has a positive impact on perceived usefulness and attitude toward online community, and that perceived usefulness positively influences attitude toward online community. The study can help IS managers and professionals plan their courses of action more effectively for users' continuous visits on online community.

• The Journal of the Korea Contents Association
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• v.14 no.3
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• pp.393-400
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• 2014

The purpose of this study is to investigate the effects of extrinsic and intrinsic compensation on organizational commitment. It is also analyzed whether the compensation selection may play a moderating role between the types of compensation and organizational commitment. A total of 295 questionnaires from 12 Chinese companies are used for data analysis. The empirical results show that the types of compensation have a positive effect on organizational commitment. It is found a moderating effect of compensation selection only between extrinsic compensation and organizational commitment. The results reveal that more focus on external compensation and adopting a flexible benefit plan are necessary to improve organizational commitment.

• Proceedings of the Korean Society of Computer Information Conference
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• 2018.01a
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• pp.1-4
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• 2018

본 논문에서는 낸드 플래시 메모리 시스템에서 가비지 컬렉션과 마모도 평준화를 동시에 수행하는 환경에서 발생 할 수 있는 세 가지 내재된 문제점들을 제시한다. 제시한 문제점들은 낸드 플래시 메모리의 추가적인 수명 연장을 방해 할 뿐만 아니라, 페이지 이주 오버헤드를 초래하는 근본적인 원인이 된다. 이러한 내재된 문제점들의 원인 분석은 다음과 같이 진행한다. 첫 번째, 세 가지 내재된 문제점들에 대한 시나리오를 구성하고, 구성한 시나리오에서 발생할 수 있는 문제점들을 제시한다. 두 번째, 각 시나리오에서 발생하는 문제점을 파악하고, 그로 인해 낸드 플래시 메모리의 수명에 영향을 끼칠 수 있는 위험성을 분석한다. 마지막으로 분석한 위험성을 토대로 이를 이론적으로 고찰하고, 그에 대한 해결책을 제시한다. 이러한 해결 방안은 낸드 플래시 메모리의 추가적인 수명 연장에 대한 새로운 방향성을 제시할 것이다. 또한 이것은 가비지 컬렉션과 마모도 평준화를 동시에 수행하는 모든 시스템 환경에 적용 가능하므로, 기존 기법들의 장점들을 그대로 활용함과 동시에 낸드 플래시 메모리의 추가적인 수명 연장을 기대 할 수 있다.

• Journal of the Korean Society for Library and Information Science
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• v.43 no.3
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• pp.297-312
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• 2009

This study examined the intrinsic and extrinsic motivational factors affecting the intention to contribute knowledge to online communities. It examined enjoyment, knowledge self-efficacy, and commitment as the intrinsic motivational factors, and anticipated reciprocity, image, and subjective norm as the extrinsic motivational factors. The results showed that intrinsic motivational factors, enjoyment and knowledge self-efficacy were found to have significant influences on attitudes towards knowledge contribution to online communities, but commitment was not. Of the extrinsic motivational factors, anticipated reciprocity was found to have a significant influence on attitudes toward knowledge contribution to online communities, but image and subjective norm were not.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.4
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• pp.670-676
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• 2008

There is a difficult plane letting a security threat to occur in Internet networks as VoIP service uses technology-based the Internet is inherent, and you protect without adjustment of the existing security solution or changes with real-time service characteristics. It is a voice to single networks The occurrence security threat that it is possible is inherent in IP networks that effort and cost to protect a data network only are complicated relatively as provide service integrated data. This paper about various response way fields to be able to prevent analysis regarding definition regarding VoIP spam and VoIP spam technology and VoIP spam.