• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2005년도 추계학술발표대회 논문집
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• pp.83-86
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• 2005

The front-end side members of automobiles, such as the hat-shaped section member, absorb most of the energy during the front-end collision. The side members absorb more energy in collision if they have higher strength and stiffness, and stable folding capacity (local buckling). Using the above characteristics on energy absorption, vehicle should be designed light-weight to improve fuel combustion ratio and reduce exhaust gas. Because of their specific strength and stiffness, CFRP are currently being considered for many structural (aerospace vehicle, automobiles, trains and ships) applications due to their potential for reducing structural weight. Although CFRP members exhibit collapse modes that are significantly different from the collapse modes of metallic materials, numerous studies have shown that CFRP members can be efficient energy absorbing materials. In this study, the CFRP side members were manufactured using a uni-directional prepreg sheet of carbon/Epoxy and axial static collapse tests were performed for the members. The collapse mode and the energy absorption capability of the members were analyzed under the static load.

• Journal of Mechanical Science and Technology
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• 제18권6호
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• pp.924-932
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• 2004

In this study, the axial collapse tests were performed under either static (or quasi-static) or impact loads with several collapse velocities based on the expectation that para-closed sections of the front-end side members (spot welded hat and double hat shaped section members) would show quite different collapse characteristics from those for seamless section. The test results showed that both of the hat and double hat shaped section members failed in the stable sequential collapse mode in the static or quasi-static collapse tests, while the double hat shaped section members underwent the unstable collapse mode especially when the impact velocity is high. The mean collapse loads in the hat shaped section members increase with collapse velocity for all the cases of the static, quasi-static, and impact collapse tests. In the double hat shaped section members, however, the mean collapse loads decrease with increase in collapse velocity in the impact tests.

• 인터넷정보학회논문지
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• 제19권5호
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• pp.123-131
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• 2018

A virtual team consists of various members with a range of professional skills. An IT virtual team can confer such advantages as improving creativity and solving problems in e-business. However, virtual teams are less cohesive than off-line based teams, at least partly because they do not meet face-to-face to solve problems. If the cohesion of the members in a team is weak, overall performance can decrease. Therefore, this study seeks to understand the specific types of leadership needed to increase the cohesiveness of the members in a virtual team. Leadership is the most important factor for the successful operation of a virtual team. Leaders engage members with goals, and motivate them by creating positive relationships. This study describes the idealized influence of transformational leadership in which a leader directly engages members in a goal, and the role of participative goal setting in which members set their own goals. In addition, this research demonstrates the benefits of a positive attitude of a leader towards their team members and the influence of leader-member exchanges. If the cohesion of virtual teams is improved through specific leadership, the team members will be more committed to their teams and work, and the team's performance will improve. Furthermore, the successful operation of virtual teams will provide an opportunity for companies in e-business to gain a competitive advantage in the contemporary environment, where creativity is important.

• 한국경영과학회지
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• 제35권1호
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• pp.19-45
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• 2010

Virtual Communities, which are formed on the Internet, are expected to serve the needs of members for e-collaboration, e-communication, information and knowledge sharing. The executives of organizations should consider virtual community as a new innovation or knowledge pool since members share knowledge. However, many virtual community have failed due to members' low willingness to engage and furthermore to share knowledge with other members. Thus, there is a need to understand and foster the determinants of members' sense of belonging behavior in virtual community. This study develops an integrated model designed to investigate and explain the relationships between contextual factors, personal perceptions of virtual community, usability, trust and sense of belonging in using a certain virtual community. Empirical data was collected from 201 and tested using structural equation modeling (SEM) to verify the fit of the hypothetical model. The results show that the perceived usability and community trust of members significantly influences sense of belonging in using the virtual community, and information quality, system quality, familiarity on the virtual community are significantly influence the usability but not reputation. And I confirmed that perceived shared vision and responsiveness play the role of determinants in making the member's trust, perceived risk influence the making community trust in directly. The results of the study can be used to identify the motivation underlying members' sense of belonging in a certain virtual community by investigating the impacts of contextual factors and personal perceptions on virtual community, the integrated model better explains behavior than other proposed models. This study might help executives of virtual communities and organizations to manage and promote these determinants of sense of belonging to stimulate members' willingness to engage the community and futhermore enhance their virtual community loyalty.

• 디지털산업정보학회논문지
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• 제16권1호
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• pp.111-129
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• 2020

The differentiators of this study are as follows. I would like to consider the factors that the compensation, considering the characteristics of the members of the ICT construction company, affects the turnover and suggest ways to promote the welfare of ICT construction company members in the fourth industrial revolution. The purpose of this study is to look at how perceived compensation affects the degree of turnover by members of small ICT construction companies through organizational Commitment and job placement. Specifically, the independent variable looks at the causal relationship between organizational civic behavior and organizational trust through Turnover intention. First, in the fourth industrial revolution, the management of the tasks of members of ICT construction companies was found to have a positive impact on their organizational immersion and job alignment. Second, in the fourth industrial revolution, the management of wages by members of ICT construction companies was found to have a positive impact on organizational immersion and job alignment. Third, in the fourth industrial revolution, the promotion management of members of ICT construction companies did not have a positive impact on their organizational immersion and job alignment Fourth, in the fourth industrial revolution, the concentration of members of ICT construction companies' organization is found to have a positive influence on turnover. Fifth, in the fourth industrial revolution, the job alignment of members of ICT construction companies was found to have a positive impact on turnover.

• BMB Reports
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• 제32권5호
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• pp.419-428
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• 1999

Tumor necrosis factor (TNF) receptor members have unique structures composed of 2-4 cysteine - rich pseudorepeats in the extracellular domain. On ligation by trimeric ligand molecules, oligomerization of three receptor molecules occurs, which in turn activates the receptor and recruits intracellular signaling molecules to the cytoplasmic tail to initiate biological events. Recently, the numbers of tumor necrosis factor receptor and ligand family members have been rapidly expanding. Functional characterization of the new members has indicated redundant roles with other known members as well as provided insights into novel functions. In particular, identification of soluble decoy receptors which have the ability to bind multiple ligands highlights a complex control mechanism of immune responses by these molecules. Studies of the new members have also revealed that the TNF receptor and ligand family members play an important role in other than the immune system.

• 가족자원경영과 정책
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• 제10권3호
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• pp.63-78
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• 2006

This study is planned to help women in international marriages to develop their sense of self-esteem and their family life and to adapt to Korean society, The findings are as follows: First, the women in international marriage tend to have low self-esteem and difficulty to adapt themselves to the society due to language barrier, cultural conflicts, sense of alienation, isolation and so on. however, now they seem to have the strength of mind by themselves, to accept other people and to adapt to the society better than before the education program by having had communications with the program members and their allied mothers in the program. Second, the cohesion among the program members per session has improved over the sessions, and the members' interest in the education program has increased. moreover, the members have opened up themselves over time. Third, the alliances with Korean teachers as their allied mothers not only helped their Korean but also taught the members about family life. It helped the members to adjust to their family life and became a mental support.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권12호
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• pp.4849-4865
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• 2020

The traditional roles of leaders are to influence members and motivate them to achieve shared goals in organizations. However, leaders such as top managers and chief executive officers, in practice, do not always directly meet or influence other company members. In fact, they tend to have the greatest impact on their members through formal speeches, company procedures, and the like. As such, official speech is directly related to the motivation of company employees. In an official speech, not only the contents of the speech, but also the voice characteristics of the speaker have an important influence on listeners, as the different vocal characteristics of a person can have different effects on the listener. Therefore, according to the voice characteristics of a leader, the cognition of the members may change, and, the degree to which the members are influenced and motivated will be different. This study identifies how members may perceive a speech differently according to the different voice characteristics of leaders in formal speeches. Further, different perceptions about voices will influence members' cognition of the leader, for example, in how trustworthy they appear. The study analyzed recorded speeches of leaders, and extracted features of their speaking style through digital speech signal analysis. Then, parameters were extracted and analyzed by the time domain, frequency domain, and spectrogram domain methods. We also analyzed the parameters for use in Natural Language Processing. We investigated which leader's voice characteristics had more influence on members or were more effective on them. A person's voice characteristics can be changed. Therefore, leaders who seek to influence members in formal speeches should have effective voice characteristics to motivate followers.

• 디지털융복합연구
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• 제20권4호
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• pp.235-245
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• 2022

본 연구는 조직 내에서 구성원들이 느끼는 상사의 언행일치가 구성원들의 발언행동에 미치는 영향을 확인하고, 언행일치와 발언행동 간의 관계에서 상사신뢰가 매개효과가 있는지, 상사의 언행일치를 통한 상사신뢰와 구성원의 발언행동 간에 구성원의 심리적 안전감의 조절효과를 검증하였다. 표본은 서비스 관련 업종으로 보험, 증권, 은행, 컨설팅, 신용카드사의 구성원들을 대상으로 설문조사하여 424부를 분석에 이용하였다. 연구결과 첫째, 상사의 언행일치가 상사신뢰와 구성원의 발언행동에 유의한 정(+)의 영향을 확인하였다. 둘째, 상사신뢰는 상사의 언행일치와 구성원의 발언행동 간의 매개효과가 있음을 확인하였다. 셋째, 구성원들의 심리적 안전감은 상사신뢰와 구성원의 발언행동 간에 조절효과가 있으며, 심리적 안전감이 평균에서 높을 때 언행일치가 상사신뢰를 매개로 발언행동에 미치는 영향에서 심리적 안전감의 조절된 매개효과가 있는 것으로 나타났다.

• 한국생산제조학회지
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• 제18권3호
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• pp.241-247
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• 2009

It is important to satisfy the requirements and standards for the protections of passengers in a car accident. There are lots of studies on the crushing energy absorption of a structure members in automobiles. We have studied to investigate collapse characteristics and moisture absorption movements of CFRP(Carbon Fiber Reinforced Plastics) hat shaped sectional members when CFRP laminates are under the hygrothermal environment. In particular, the absorbed energy, mean collapse load and deformation mode were analyzed for side members which absorbed most of the collision energy. Variation of CFRP interlaminar numbers is important to increase the energy absorption capability. Therefore we have made a static collapse experiment to research into the difference of absorbed energy and deformation mode between moisture absorbed specimen and non-moisture absorbed.