• Journal of Digital Convergence
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• v.9 no.4
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• pp.115-130
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• 2011

The purpose of this study is to examine the effect of career plateau(structural and content plateau) on IT service technical engineers' career satisfaction and career withdrawal intention. Survey data were collected from 161 IT service technical engineers. The results indicated that structural and content plateau were negatively related to career satisfaction, and content plateau was positively related to career withdrawal intention, but not structural plateau. In addition, the results of hierarchical multiple regressions indicated that content plateau had stronger effect on career satisfaction and career withdrawal intention then content plateau.

• KIISE Transactions on Computing Practices
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• v.21 no.1
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• pp.19-28
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• 2015

In this paper, we proposed an algorithm for the identification of relieving or worsening current traffic congestion using historic traffic congestion patterns. Historical congestion patterns were placed in an adjacency list. The patterns were constructed to represent spatial and temporal length for status of a congested road. Then, we found information about historical traffic congestions that were similar to today's traffic congestion and will use that information to show how to change traffic congestion in the future. The most similar pattern to current traffic status among the historical patterns corresponded to starting section of current traffic congestion. One of our experiment results had average error when we compared identified changes of the congestion for one of the sections in the congestion road by using our proposal and real traffic status. The average error was 15 minutes. Another result was for the long congestion road consisting of several sections. The average error for this result was within 10 minutes.

• Journal of Korean Society of Transportation
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• v.24 no.3 s.89
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• pp.29-37
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• 2006

As a recurrent congestion of urban freeway occurs in almost same time and section, it is possible to manage the congestion effectively by the expectation and advance correspondence. In the existing traffic management system. we have used pattern data to manage a recurrent congestion. But it is not applicable to an urban freeway which kas various traffic circumstance. In this study, the probability by travel speed using a statistical distribution method will be used to predict the probability of recurrent congestion. It is expected that we can get the point of time and the duration of recurrent congestion, and we can devise an effective advance correspondence and a transportation operation.

• Journal of the Korean Institute of Intelligent Systems
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• v.21 no.2
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• pp.186-191
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• 2011

Ramp metering has been used to solve recurrent or non-recurrent congestion on many highways. However, the existing ramp metering methods cannot control non-recurrent congestion like incident and don't have any methods to solve congestion after congestion. In addition, the methods cannot solve congestion quickly because ramp metering operates independently for each ramp. In this study, we developed SARAM which is ramp metering technique with shockwave theory in order to solve the problems. In simulation from Jangsoo IC to Joongdong IC, we confirmed that speed increased by 7.32km/h and delay time reduced by 39.14sec.

• Journal of Technology Innovation
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• v.26 no.4
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• pp.122-145
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• 2018

This paper investigates the relationship between R&D professionals' career plateau and organizational commitment in which career plateau's sub-dimensions consist of structural and job-content plateau. Further, it aims to examine the moderating effect of age and creative behavior of R&D professionals on the relationship between career plateau and organizational commitment. Empirical data were collected from 418 R&D professionals who work for Government sponsored research institutions. The results showed that the relationship between structural plateau and organizational commitment is differently related depending on age level. That is, the negative relationship between structural plateau and organizational commitment is stronger for junior R&D professionals. Furthermore, the relationship between job-content plateau and organizational commitment is negatively related, and differs in the strength depending on the creative behavior level of R&D professionals. For one with stronger characteristics of creative behavior, job-content plateau is more negatively related to organizational commitment. Based on the results, some implications are suggested on the career plateau issues of R&D professionals who work for government sponsored research institutions. Finally, it is discussed on the limitations of this study and further research directions.

• Journal of Korean Society of Transportation
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• v.25 no.6
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• pp.99-109
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• 2007

There have been few studies on the impacts of independent recurrent and non-recurrent congestion on freeway networks. The main reason is due partly to the lack of traffic data collected during those periods of recurrent and non-recurrent congestion and partly to the difficulty of using the simulation tools effectively. This study has suggested a methodology to analyze the independent impacts of the recurrent and non-recurrent congestion on target freeway segments. The proposed methodology is based on an elaborately calibrated simulation analysis, using real traffic data obtained during the recurrent and non-recurrent congestion periods. This paper has also summarized the evaluation results from the field tests of two ITS technologies, which were developed to provide drivers with real-time traffic information under traffic congestion. As a result, their accuracy may not be guaranteed during the transition periods such as the non-recurrent congestion. In summary, this study has been focused on the importance of non-recurrent congestion compared to recurrent congestion, and the proposed methodology is expected to provide a basic foundation for prioritizing limited government investments for improving freeway network performance degraded by recurrent or non-recurrent congestion.

• Journal of Digital Convergence
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• v.15 no.5
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• pp.189-195
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• 2017

The pursuit of independent self-development in adolescence and the development of self-identity are related to their adaptation in social life. In Korea, too, college is the place where graduates from high school go to advance in society. The purpose of study is to investigate the relationship between self - identity and college life in university students. First, self - identity has a positive effect on academic adjustment. Specifically, goal orientation has a positive effect on academic adjustment. Second, self - identity has a positive effect on emotional adjustment. In detail, self-acceptance, future confidence, and goal orientation were found to affect emotional adaptation. Finally, self - identity did not affect university satisfaction.

• Journal of Korean Home Economics Education Association
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• v.30 no.2
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• pp.21-37
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• 2018

The purposes of this study were to examine the influence of the self-identity, parenting style, peer attachment, and relationship with teacher on career identity, and to verify if self- identity shows the moderating effect in the relationship among the parenting style, peer attachment, relationship with teacher, and career identity of middle school students. The data of 3rd-year middle school students, from the 1st grade panel of 'Korea Children And Youth Panel Survey(KCYPS)' by National Youth Policy Institute, was used as the analysis data. The program which was used for the analysis was SPSS ver 22.0 for descriptive, Cronbach's α, and multiple regression analysis. The results of this study are as follows. First, it was revealed that the most influential variable for career identity was self identity, followed by peer attachment, while relationship with teacher is least influential. Parenting style did not have a direct effect on career identity. Second, it was revealed that self-identity had a moderating effect when the interaction between parenting style and the self-identity, and the interaction between relationship with teacher and the self-identity were injected. Therefore, if the education related to the self-identity is conducted continuously in the home economics subject, the conflict and anxiety on the career problem of middle school students will be reduced and the career identity will be developed more effectively.

• Journal of Korean Tunnelling and Underground Space Association
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• v.18 no.1
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• pp.41-52
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• 2016

When the queue length of congestion vehicles in tunnel fire is extended beyond tunnel length, the capacity of smoke control system needs to be increased in line with ventilation resistance. However, the vehicle queue length is not defined, so a rational equation is necessary in current fire prevention guideline. This study is intended to propose an equation to calculate the queue length considering the number of vehicles in queue in tunnel fire and evaluate the applicability by tunnel length as well. When it comes to normal tunnel, it is necessary to compare the vehicle queue length with tunnel length up to the length of 1,200 m in a bid to avoid applying the vehicle queue length excessively in case of fire. As a result of evaluation of applicability to model a tunnel, saving the number of jet fan for smoke control appeared to be effective. Besides, quantitative approach to explain the vehicle queue length through the relationship between the percentage of large vehicles and tunnel length was presented. Consequently, when the queue length of the congestion vehicles exceeds the tunnel length in determining the capacity of smoke control system in case of fire, the number of vehicles beyond the tunnel length needs to be excluded from estimating the ventilation resistance by vehicles.

• Journal of Service Research and Studies
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• v.6 no.2
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• pp.117-131
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• 2016

This study analyzes the influence of the career plateau perceived by food service industry employees on their turnover intention. The perception of career plateau is classified as either structural or content-driven. This work also examines how organizational support (formal and informal) for career development affect turnover intention in their interaction with career plateau (structural and content-driven). The research hypothesis was objectively verified based on an analysis of the data on 255 employees. As a result, the structural and content-driven career plateaus perceived by employees were observed to have a positive overall effect on their turnover intention. Aslo, informal organizational support for career development moderates the relationship between career plateau and turnover intention but not formal organizational support.