• Research in Community and Public Health Nursing
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• v.25 no.2
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• pp.119-127
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• 2014

Purpose: This study was done to identify the relationships among diabetic health leader attitude, diabetic knowledge, and health conservation in highly educated elders. Methods: The participants were 119 elders aged 65 or more who were attending the senior welfare centers in D and K City and had at least a high school degree. Data were collected from June 10 to July 7 in 2013. Data analysis included one-way ANOVA, independent t-test, Pearson's correlation, and stepwise multiple regression, done with the SPSS/WIN 19.0 program. Results: A positive correlation was found among diabetic health leader attitude, diabetic knowledge, and health conservation. Health conservation explained 26% (${\beta}$=.31) and diabetic knowledge explained 2% (${\beta}$=.18) of the variance in diabetic health leader attitude. Conclusion: The results indicate that to increase diabetic health leader attitude among highly educated elders, health leader programs are needed for increasing their diabetic knowledge and health conservation.

• Journal of Distribution Science
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• v.19 no.7
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• pp.41-50
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• 2021

Purpose: This study aims to analyze the effect of nepotism on work engagement. In addition, this study aims to analyze the mediating effect of leader legitimacy in the relationship between nepotism and work engagement in the distribution industry. Research design, data and methodology: 236 survey data were collected and analyzed using SPSS 22 and AMOS 22. For the assessment of the goodness of fit of the models, indexes such as TLI, CFI, RMSEA were used. For hypotheses testing, we used SEM method and bootstrapping. Results: The results of this study are as follows. First, the relationship between nepotism and the employee's work engagement was not significant. Second, it was revealed that nepotism negatively affects the leader's legitimacy. Third, it was found that a leader's legitimacy had a positive effect on the employees' work engagement. Fourth, leader legitimacy was found to mediate the relationship between nepotism and employees' work engagement. Conclusion: We found that the effect of nepotism can be changed depending on contingent factors. This study contributed to the accumulation of nepotism theory by demonstrating the process in which nepotism, which has been insufficient so far, affects outcome variables. Based on the empirical results of this study, theoretical and practical implications, limitations, and future research directions were discussed.

• Journal of Digital Convergence
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• v.15 no.11
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• pp.67-76
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• 2017

To conduct research using small group learning with advanced technology in school, small group collaborative learning was conducted in virtual reality called Second Life for high school history class to verify the effects of the role of group members (leader, group member) in collaborative learning activities in this study. Two classes of the second grade of high school were selected randomly and 20 groups were also randomly assigned, and each group was consisted of three members (1 leader and two group members). Academic achievement and satisfaction with academic activities were used to verify the effect of the role as measurement tools, and collected quantitative data were tested by independent sample t. As a result, it was found that performing the role of leader in collaborative learning activities in virtual reality was effective in promoting enhancing students' academic achievement and increasing satisfaction level. Lastly, utilization and improvement of small group collaborative learning using virtual reality in the field of education were discussed.

• Journal of Engineering Education Research
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• v.24 no.1
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• pp.3-14
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• 2021

The purpose of this study is to analyze the characteristics of efficient problem-solving teams and inefficient problem-solving teams using SYMLOG. In this study, 35 college students majoring in engineering education at C university were organized into 7 teams and carried out technological problem solving projects over one semester. Based on the results of the team project, the top 2 teams were defined as efficient problem solving teams and the bottom 2 teams were defined as inefficient problem solving team, and analyzed the characteristics of the team using SYMLOG. The main results are as follows: First, an analysis of SYMLOG from efficient problem solving teams and inefficient problem solving teams showed that there was a difference between self-awareness and others' perception in terms of U(Upward)-D(Downward) dimension. Second, in the inefficient problem solving teams, there was a significant difference between self-awareness and others' in the F(Forward)-B(Backward) dimension. Third, there was no difference between self-awareness and others' in both efficient and inefficient teams at the P (Positive)-N(Negative) dimension. Fourth, an efficient problem-solving team had a clear leader, and there was a team member who supported the leader. On the other hand, the inefficient problem-solving team did not have a clear leader, or one person played the role of leader and there were no team members supporting the leader.

• Current Optics and Photonics
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• v.5 no.4
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• pp.384-390
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• 2021

This paper presents a wide-range tunable wavelength-locking technology based on optoelectronic oscillation (OEO) loops for optical fiber sensors and microwave photonics applications, explains the theoretical fundamentals of the design, and demonstrates a method for locking the relative wavelength differences between a leader semiconductor laser and its follower lasers. The input of the OEO loop in the proposed scheme (the relative wavelength difference) determines the radio-frequency (RF) signal frequency of the oscillation output, which is quantized into an injection current signal for feedback to control the wavelength drift of follower lasers so that they follow the wavelength change of the leader laser. The results from a 10-hour continuous experiment in a field environment show that the wavelength-locking accuracy reached ±0.38 GHz with an Allan deviation of 6.1 pm over 2 hours, and the wavelength jitter between the leader and follower lasers was suppressed within 0.01 nm, even though the test equipment was not isolated from vibrations and the temperature was not controlled. Moreover, the tunable range of wavelength locking was maintained from 10 to 17 nm for nonideal electrical devices with limited bandwidth.

• Genomics & Informatics
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• v.15 no.4
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• pp.142-146
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• 2017

More effective production of human insulin is important, because insulin is the main medication that is used to treat multiple types of diabetes and because many people are suffering from diabetes. The current system of insulin production is based on recombinant DNA technology, and the expression vector is composed of a preproinsulin sequence that is a fused form of an artificial leader peptide and the native proinsulin. It has been reported that the sequence of the leader peptide affects the production of insulin. To analyze how the leader peptide affects the maturation of insulin structurally, we adapted several in silico simulations using 13 artificial proinsulin sequences. Three-dimensional structures of models were predicted and compared. Although their sequences had few differences, the predicted structures were somewhat different. The structures were refined by molecular dynamics simulation, and the energy of each model was estimated. Then, protein-protein docking between the models and trypsin was carried out to compare how efficiently the protease could access the cleavage sites of the proinsulin models. The results showed some concordance with experimental results that have been reported; so, we expect our analysis will be used to predict the optimized sequence of artificial proinsulin for more effective production.

• Journal of Korean Society of Rural Planning
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• v.12 no.1 s.30
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• pp.59-66
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• 2006

The purposes of this study were to identify leadership competences of rural leaders and to analyze leadership competency of leaders. The study carried out by questionnaire and focus group interview on expert panels. To analyze leadership competency, the data was collected from 273 rural leaders by stratified random sampling. SPSSWIN/ver10 program was used for analyzing data with t-test and IPA method. The study suggests twenty low types of leadership competences which were information, vision, decision making, motivation communication, education residents, managing residents, loaming, flexibility, problem solving, presentation program management, customer orientation service knowledge, making relationship, creative idea, business understanding, brand development, conflict resolution negotiation, assessment, business management, coaching and feed back. Whereas leaders with middle school educational career required developing program management, maintaining achievement and benchmarking, leaders with high school were morel likely to develope self-learning, to benchmark their knowhow and brand development competency. Whereas leader with less low years experiences as leader have been considered as developing coaching/feedback brand development and program development, leaders with more five years as leader should consider developing benchmarking, resident education, and brand development. The study suggests that the extension agents on public should develop leadership program according to the competency differences of leaders.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.56 no.3
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• pp.238-245
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• 2020

In this study, a motion control problem for the vessel towed by towing ship on the sea is considered. The towed vessel does not have self-control capabilities such that its course stability totally depends on the towing ship. Especially, in the narrow canal, river and congested harbor area, extreme tension is required during the towing operation. The authors, therefore, propose a new control system design method in which the rudder is activated to provide its maneuverability. Based on the leader following system configuration, a nonlinear mathematical model is derived and a backstepping control is designed. By experiment results with nonlinear control framework, the usefulness and effectiveness of the proposed strategy are presented.

• ETRI Journal
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• v.38 no.5
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• pp.1008-1018
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• 2016

This paper presents a control scheme for the leader-following formation of multiple robots. The control scheme combines the sliding mode control (SMC) method with the nonlinear disturbance observer (NDOB) technique. The formation dynamics suffer from uncertainties because the individual robots are uncertain. Concerning such formation uncertainties, the leader-following formation dynamics are modeled. Assuming that the formation uncertainties have an unknown boundary, an NDOB-based observer was designed to estimate the formation uncertainties. A sliding surface containing the observer outputs has been defined. Regarding the sliding surface, an SMC-based controller was investigated to form uncertain robots. A sufficient condition in the sense of the Lyapunov theory was proven such that the formation system is asymptotically stable. Herein, some comparison results between the sole SMC method and the second-order SMC method are presented to demonstrate the effectiveness and feasibility of the control scheme for multiple robots in the presence of uncertainties.

• The Korean Journal of Health Service Management
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• v.10 no.1
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• pp.79-91
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• 2016

Objectives : The purpose of this study is to suggest an efficient human-resources direction for the management of dental hygienists, the study analyzes the influential relationship between superior's coaching leadership as perceived by dental hygienists and their on the job satisfaction, and proves the moderating effects of leader trust and of followership in the process. Methods : To test the empirical model, data were collected by survey using structural self-administered questionnaires that were distributed to 300 dental hygienists working at dental clinics in the Busan, Ulsan, Gyeongnam, and Gyeonggi areas, from 27 March to 10 April, 2015, 286 cases were used in final analysis. Results : Coaching leadership is found to have a significant influence on job satisfaction. Trust in a leader showed a significant main moderating effect on job satisfaction, on the other hand, followership showed a significant main effect, but no significant moderating effect, on job satisfaction. Conclusions : The results of this study imply that leadership factors such as coaching leadership and leader trust are crucial for improving the job satisfaction of dental hygienists, therefore, a program for enhancing the leadership skills of dental managers is needed in dental health organizations.