• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.14 no.3
• /
• pp.1157-1163
• /
• 2013

The purpose of this study is to investigate the relationship among self-efficacy, self-determinative motivation and creative thinking ability. And to confirm the relative predictive power of motivation variables in predicting middle school students' creative thinking ability. The instruments used in this study were 'TTCT', 'Self-efficacy' and 'Self-Regulation Scale'. Self-reported response data on these instruments from 212 middle school students in Seoul were analyzed. The data were analyzed with descriptive statistics, Pearson correlations, multiple stepwise regression analysis by using SPSS 18.0. The major results of this study were as follows; First, the correlations among self-efficacy, self-determinative motivation and creative thinking ability were significant. Second, Task difficulty preferred, self-control efficacy and internal motivation were the best predictor of creative thinking ability in middle school students. This study suggested that Task difficulty preferred, self-control efficacy and internal motivation is essential to improve creative thinking ability in middle school students.

• The Transactions of The Korean Institute of Electrical Engineers
• /
• v.65 no.7
• /
• pp.1151-1160
• /
• 2016

In recent years, the energy storage systems such as LiB, NaS, RFB(Redox-Flow Battery), Super- capacitor, pumped hydro storage, flywheel, CAES(Compressed Air Energy Storage) and so on have received great attention as practical solutions for the power supply problems. They can be used for various purpose of peak shaving, load leveling and frequency regulation, according to the characteristics of each ESS(energy storage system). This paper will focus at 1 MWh RFB system, which is being developed through the original technology project of energy material. The output of ESS is mainly characterized by C-rate, which means that the total rated capacity of battery will be delivered in 1 hour. And it is a very important factor in the ESS operation scheduling. There can be several options according to the operation intervals 15, 30 and 60minutes. The operation scheduling is based on the optimization to minimize the daily electricity cost. This paper analyzes the cost-saving effects by the each operating time-interval in case that the RFB ESS is optimally scheduled for peak shaving and load leveling.

• Journal of radiological science and technology
• /
• v.28 no.2
• /
• pp.117-122
• /
• 2005

According to the Para. 5 of Art 2 of the Korean Nuclear Safety Regulations, which was revised in 1999, internal dose assessment as well as external one should be performed by law for employees at a nuclear power plant from 2003, and their estimate errors should also be within 50%. Thus, more accurate internal dosimetry becomes important. Corresponding to such regulation revision, we are developing a more accurate thyroid-uptake internal dosimetric system and have developed a Monte Carlo simulation code, the so-called CALEFF, to calculate the detection efficiency of the dosimetric system. In this paper, we calculated detection efficiencies with various test conditions by using the CALEFF code and discussed their characteristics. We may use the detection efficiency calculated by the code in calibrating the thyroid internal dose from measured data.

• International Journal of Highway Engineering
• /
• v.11 no.4
• /
• pp.95-105
• /
• 2009

This study was conducted to investigate the effects of concrete flexural strength and surface smoothness, which were pay factors of concrete pavements, on pavement performance, and to develop the methodologies to determine the proper allowable ranges according to the magnitudes of those pay factors. The concrete flexural strength was analyzed using the AASHTO, power, and linear fatigue failure models, and the surface smoothness was analyzed for the roughness indices of PSI, IRI, and PrI using the AASHTO model. The analysis results showed that the allowable range of the flexural strength should be determined using the rate between the deficiency and strength, and the penalty should be linearly proportional to the strength deficiency rate because the linear relationship between the strength deficiency rate and the reduction in pavement life was observed. As the initial surface smoothness became better, the smoothness deficiency rate should be larger. The penalty due to the surface smoothness deficiency should also be linearly proportional to the smoothness deficiency rate.

• Journal of the Korean Society of Hazard Mitigation
• /
• v.11 no.2
• /
• pp.81-86
• /
• 2011

Without a special mineral resources in Korea, such as petrochemical industries, electronics and automotive industries to supply the basic material, but remains a key industry locations. Gongjeongsang dealing with hazardous materials, such as a fire or explosion hazard, and from this site sangjonhae safety regulations to protect human and material disaster prevention activities are focused. However, depending on the actual implementation of standardized safety regulations as necessary if not originally intended, proper objectivity and reliability of safety regulations, as well as impaired resulting in a waste of public and private administrative power and petrochemical industries and the competitiveness of the entire drop factor will. Accordingly, this study petrochemical plant is applied to a representative safety regulations, items for their safety are needed and these regulations as being implemented that was identified, according to a study, some of the need for regulation and implementation both in terms of reliability was low.

• Journal of Digital Convergence
• /
• v.19 no.12
• /
• pp.661-673
• /
• 2021

This study is a descriptive study to understand the effect on the health behavior compliance of men who got coronary intervention, focusing on the elapsed period. The subjects of this study were 249 men who underwent coronary intervention at a university hospital, and the collected data were analyzed using Stepwise multiple regression. As a result of the study, the influencing factors the implementation of healthy behaviors were self-regulation(β=0.35, p<.001), risk factors among educational request(β=-0.26, p<.001), and the elapsed period(β=0.19, p<.001), marital status(β=0.15, p=.001), educational level(β=-0.12, p=.035), and the total explanatory power was 29.1%. IIn order to increase the health behavior performance of male patients who underwent coronary intervention, it is necessary to develop a program that can strengthen the autonomous motivation of subjects with high severity and elapsed time of less than 1 year and more than 1 year.

• Journal of Digital Convergence
• /
• v.19 no.9
• /
• pp.19-31
• /
• 2021

The influence of online platforms has become even more powerful than ever and there has been growing calls to regulate its enormous market power. Issues relating to platform monopolies have been discussed in Korea and recently the Online Platform Intermediary Transactions Fairness Bill has passed the Cabinet Council. Thus, we aim to analyze online platform regulations from stakeholder perspective and then address the regulatory direction. We first investigate the consequences of platform strategies including mergers that platform owners take. In addition, we inspect the possible effects of online platform regulations on its stakeholders. Our research can contribute to having a more balanced view on the online platform regulation that is somewhat in the favor of protecting platform complementors and consumers.

• Cross-Cultural Studies
• /
• v.35
• /
• pp.185-214
• /
• 2014

This paper presents an investigation into the forms of master archer Huhdai Mergen from Mongolian mythology and his character through archery. In Mongolian mythology, master archer Huhdai Mergen is usually connected to the regulation of the sun, the moon, and the stars in Heaven and the creation of stars. Such a series of acts are conducted through archery, which used to be performed as an incantatory ritual to resolve a disaster in life, dispel an evil spirit, and pray for affluence as well as for hunting. In Mongolian mythology, Huhdai Mergen is a master archer and hunter that rises to Heaven while hunting a deer and becomes Sirius with the deer becoming Orion. The Mongolian have believed that the two constellations protect them since ancient times. While Orion is related to the deer totem, Huhdai Mergen or Sirius is related to the wolf totem faith. Huhdai Mergen takes too much pride in his archery skills and ends up causing damage to himself, which can be understood as a pattern of controlling the power of personified Huhdai Mergen through excessive natural force. He also has something to do with Polaris, which is regarded as the stake to bind his horse to by the Mongolian. They also believe that their ancestral gods reside in the horse stake or column. The stake is the residence of Huhdai Mergen protecting the Mongolian people, which reflects his aspect as an ancestral god. He is also depicted as the god of thunder and lightning born in a cow. The stones he throws and the arrows he shoots in Heaven are the embodiments of thunder and lightning. The Mongolian have understood lightning of dispelling an evil spirit and striking wicked things as the arrow of Huhdai Mergen. The god of thunder and lightning has the attributes of a fertility god such as eliminating bad devils and bringing affluence. Huhdai Mergen is also manifested as the creator to create the earth and the savior to save mankind. Such forms all derive from his archery skills.

• Journal of Digital Convergence
• /
• v.17 no.2
• /
• pp.433-445
• /
• 2019

The purpose of this study was to investigate the relationship between parenting behaviors and parental insights by examining the effects of parental insights in addition to the main variables found to explain parenting behaviors through previous studies. In addition to the parental insight, this study examined the influence of past childhood experiences(perceived parenting behavior, family of origin' health) and parenting experience (marital satisfaction, parental role satisfaction) in current life. As a result of hierarchical regression analysis of 202 mothers of middle school students, all of the input variables were found to explain the parenting behavior significantly. In particular, parental insight was proved to have significant explanatory power on affection, rejection, regulation, and independence-oriented behavior among the sub-factors of parenting behavior except overprotective. Finally, the implications of this study and future research directions were discussed.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2016.10a
• /
• pp.520-523
• /
• 2016

This paper describes a DC-DC converter with MPPT control for thermoelectric energy harvesting. The designed circuit converts low voltage harvested from a thermoelectric generator into higher voltage for powering a load. A start-up circuit supplies VDD to a controller, and the controller turns on and off a NMOS switch of a main-boost converter. The converter supplies the boosted voltage to the load through the switch operation. Bulk-driven comparators can do the comparison under low voltage condition and are used for voltage regulation. Also, bulk-driven comparators raise system's efficiency. A peak conversion efficiency of 76% is achieved. The proposed circuit is designed in a 0.35um CMOS technology and its functionality has been verified through simulations. The designed chip occupies $933um{\times}769um$.