• Journal of the Korean Institute of Educational Facilities
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• v.26 no.3
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• pp.13-17
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• 2019

• Journal of Korean Association for Spatial Structures
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• v.19 no.1
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• pp.18-30
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• 2019

• Construction Engineering and Management
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• v.23 no.2
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• pp.55-59
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• 2022

• Journal of the Korean School Mathematics Society
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• v.13 no.3
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• pp.381-395
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• 2010

The purpose of this paper is to examine the competence and the methods of problem solving in four operations word problems based on the informal knowledges by five-year-old children. The numbers which are contained in problems consist of the numbers bigger than 5 and smaller than 10. The subjects were 21 five-year-old children who didn't learn four operations. The interview with observation was used in this research. Researcher gave the various materials to children and permitted to use them for problem solving. And researcher read the word problems to children and children solved the problems. The results are as follows: five-year-old children have the competence of problem solving in four operations word problems. They used mental computation or counting all materials strategy in addition problem. The methods of problem solving were similar to that of addition in subtraction, multiplication and division, but the rate of success was different. Children performed poor1y in division word problems. According to this research, we know that kindergarten educators should be interested in children's informal knowledges of four operations including shapes, patterns, statistics and probability. For this, it is needed to developed the curriculum and programs for informal mathematical experiences.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.4
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• pp.795-802
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• 2011

In this paper, the detailed design procedure of the Y-junction stripline isolator self-contained the filter circuit in the center conductor in order to maximize attenuations below value of 30 dB at 3rd order harmonics is presented. The HFSS is used to simulate 1.8GHz band isolator and the results are compared with the measurement data. These results confirms that the designed stripline isolator is effective in achieving high attenuation above -30 dB at 3rd order harmonics. And it is obtained that the harmonic band of isolator using the ferrite of 0.16T is moved far from operating frequency more 1.2 GHz than one using the ferrite of 0.12T.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.10
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• pp.5037-5047
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• 2013

This study was conducted to identify the relationship between internet addiction and adult children propensity, mental health in college students. Data were collected from 502 college students in G city, from November 5 to November 30, 2012 and analyzed using the SPSS/WIN 18.0 program. Internet addiction was a significantly positive correlation between adult children propensity(r=.395, p<.001) and mental health(r=.479, p<.001). Adult children propensity was a significantly positive correlation with mental health(r=.432, p<.001). Also, General characteristics, internet addiction and adult children propensity accounted for 42% of the variance in mental health among college students. The implication of the results is need to consider adult children propensity to reduce internet addiction and improve mental health in college students.

• Journal of Convergence for Information Technology
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• v.10 no.6
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• pp.14-18
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• 2020

In this paper, when two sets of cross-eye jammer antennas are installed vertically to jam a monopulse radar, the jamming effects according to the jammer's phase difference, amplitude ratio, and radar angle of engagement are analyzed. The phase difference and amplitude ratio of the cross-eye jammer can be adjusted in the jammer, but since the angle of engagement is relatively determined by the radar, it is very important to respond to changes in the angle of engagement. The orthogonally deployed jammer antennas can be considered as a good way to increase the jamming effect while minimizing the hardware configuration, and the jamming effect is analyzed while changing the angle of inclination from 0° to 360°. This jammer greatly improves the jamming effects at the angles of incidence 45°~135° and 225°~315°, compared to a single jammer. And it is expected to be useful in the design of cross-eye jammers for military aircraft and ships.

• Korean Journal of Construction Engineering and Management
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• v.10 no.3
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• pp.13-21
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• 2009

The ideas created by the execution of Value Engineering(VE) during design phase are usually proposed in a scattered way due to the characteristic of brainstorming. Because of this process, it is likely that similar ideas are proposed duplicatedly, and the created similar overlapping ideas may lead to different analyses and evaluations respectively. The efficient analysis/evaluation of the such similarly created ideas are not easy and the verification of the adequacy and objectivity of the ideas becomes harder and the objective evaluation gets more difficult as well as consumes much time. In spite of the perfect executions of preparatory step for idea creation, the difficulties in managing the similarly created ideas in quantity systematically result in the reduced reliability of the VE activities during design phase. Thus, this study proposes a process model for the efficient idea creation and management of the VE activities during design phase.

• Korean Journal of Social Welfare
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• v.62 no.1
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• pp.83-107
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• 2010

This study looked into the inner experience of foster mothers who adopted children under 3 months old and found out they were disabled while they were rearing with Van Manen's hermeneutic phenomenological approach. In-depth interviews were used with six foster mothers who live in Seoul, Gwangju, Gyeongsangnam-do, and Jeollabuk-do. The study resulted in a hermeneutic writing with titled "Love of Mothers Who Want to Make Their Children's Dreams Come True" with six essential themes as follows: 'being at a loss wrapped in a dense fog,' 'venting off the frustration,' 'gratitude amid painfulness,' 'bold confrontation with prejudices,' 'disabled children's return to the center of their moms' life,' and 'expectation for their future life.' As they are disabled, foster mothers want to rear their children with more care and attention to make their children's dreams come true. Seen above, this could be interpreted as mothers' love to a life. For foster mothers, the disability of their adopted children is not a burden but an expectation for a new world. They help the children live by themselves. It shows that every child can have his own home.

• Journal of Digital Convergence
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• v.14 no.6
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• pp.431-438
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• 2016

This study will be targeting 21-24 years old college students majoring in physical education. This study covers the effect of kinesiology taping and icing treatment on the recovery rate of blood lactate concentration, and cardiovascular function so that it can provide the basic data for improving physical performance. As a result of this study, Kinesio taping and icing aid the recovery rate of the maximum load of lactic acid recovery rate and 30 minutes after exercise heart rate after exercise, but increased, after 15 minutes, immediately after exercise heart rate, exercise lactate and heart rate, and 30 minutes after exercise lactate showed no difference. In conclusion, Kinesio taping and icing treatment, reduce pain and fatigue but it is not satisfactory. Further study, applying a more accurate and technical form of exercise programs needs to continuously research the effects of Kinesio taping and icing treatment