• Journal of Technology Innovation
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• v.22 no.2
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• pp.105-129
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• 2014

In order to identify the antecedents of organization's exploration activities, this study focuses on internal factors. There are many theoretical and empirical studies for an organization's exploration activities, while the research on antecedents is limited. This study is aimed at the manufacturing industry in Korea from 1998 to 2012 using data from 15 years of slack, ownership structure, and TMT diversity. The study examined the impact of these firm-specific factors on firm's exploration activities. As a result, a company's exploration activities and slack have positive relationship. Between insider ownership and exploration activities, the hypothesis was not supported. Also, the relationship between TMT diversity and exploration activities was dismissed. Finally, based on the results of this analysis, the contribution of this study, limitations and implications are drawn.

• The Journal of the Korea Contents Association
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• v.18 no.2
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• pp.11-25
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• 2018

This study analyzed how the entrepreneurial orientation of Korean CEO influenced to the performance of companies in entertainment business. The research verified the direct influence that the entrepreneurial orientation of entertainment business affected the companies' performance, and examined the diversity of TMT and the control effect of corporate governance. This study contributed to previous researches in two ways. The first, the study verified the concept of entrepreneurial orientation on entertainment business which was only focused on manufacturing or IT industry although the entrepreneurial orientation received attention as a significant research issue on middle and small venture businesses. Second, the research also verified the characteristics of CEO and executives bringing the concept of TMT's diversity in entertainment companies which were dependent on person's capacity. As a result of the research, the entrepreneurial orientation (innovation, proactiveness, risk-taking) of entertainment entrepreneurs led to a positive effect on financial performance. The research showed that the more TMT was diverse or ownership oriented management, the more broadened the positive effects.

• Therapeutic Science for Rehabilitation
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• v.9 no.1
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• pp.45-55
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• 2020

Objective : The purpose of this study was to investigate the effects of visual perception on driving performance and the importance of visual training for improving driving performance in patients with stroke. Methods : The evaluations, using MVPT(Motor-free Visual Perception Test), TMT A&B(Trail Making Test A & B), UFOV(Useful Field Of View test), and a driving simulator, were carried out with patients in department of physical medicine and rehabilitation in a rehabilitation hospital from October 2014 to November 2014. Results : Driving performance was related to the ability of various visual perceptions of patients with stroke, and the highest correlation was found in the UFOV subtest 2, TMT B, and MVPT. The results of discriminant analysis indicated a sensitivity of 100.0%, specificity of 80.0%, and predicted the results of the driving simulator with 89.5% accuracy. Conclusion : This study found that visual-perception skills influence driving performance and suggested the importance of visual-perception skill training for driving.

• Korean Journal of Psychosomatic Medicine
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• v.25 no.1
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• pp.63-72
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• 2017

Objectives : Attention-deficit hyperactivity disorder(ADHD) is characterized by significant impairments in executive functions, with a prevalence of approximately 3-5% of all children worldwide. The goal of this study was to examine the relationship between executive functions and electrophysiological activities in children and adolescents with ADHD. Methods : In 31 patients with ADHD, resting-state EEG was recorded, and Comprehensive Attention Test(CAT), Stroop Color-Word Inference Test(Stroop CWIT), Trail Making Test(TMT), and Wisconsin Card Sorting Test(CST) were administered. Korean version of the ADHD Rating Scale(K-ARS) was assessed. Results : Alpha and beta power positively correlated with the Attention Quotient(AQ), while delta power negatively correlated with AQ from CAT. In the Stroop CWIT, decreased delta power and increased beta power were related to higher performance. Power of the alpha band increased with higher TMT performance. Moreover, delta power negatively correlated with good performance on the CST, while alpha and high gamma band showed a positive correlation. Correlation with the parent-rating of ADHD symptoms showed a negative correlation between alpha power and higher scores on the K-ARS. Conclusions : These findings indicate that relative power in higher frequency bands of EEG is related to the higher executive function in children and adolescents with ADHD, while the association with the relative power in lower frequency bands of EEG seem to be vice versa. Furthermore, the findings suggest that QEEG may be a useful adjunctive tool in assessing patients with ADHD.

• Korean Journal of Breeding Science
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• v.49 no.3
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• pp.129-140
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• 2017

This study was carried out to develop of environmental risk assessments and the biosafety guide for Vitamin E enhanced transgenic soybean at LMO (Living Modified Organism) isolation field. In LMO quarantine area of National Institute of Agricultural Sciences, insect species diversities and population densities on vitamin E enhanced transgenic soybean and non-GM soybeans (Willams 82 and Seoritae) were investigated. A total of 17,717 individuals of 77 species from 8 orders were collected in LMO isolation field. In three type soybeans field, total of 5,250 individuals in Vitamin E enhanced transgenic soybean, 5,510 individuals in Willams 82, and 6,957 individuals in Seoritae were collected, respectively. There was no difference between the population densities of insect pests, natural enemies and other insects on Vitamin E enhanced transgenic soybean and Willams 82, while natural enemies density on Seoritae was higher than on Vitamin E enhanced transgenic soybean, but insect pests density on Vitamin E enhanced transgenic soybean was higher. These results provided the insects diversity for risk assessment survey of Vitamin E enhanced transgenic soybean and suggested that the guideline could be useful to detect LMO crops.