• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.12 no.3
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• pp.19-28
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• 2013

This study evaluated the quantitative effects of the deployment of semi-actuated signal systems using field data. For this, a semi-actuted signal system was deployed in the regional roadway network extensively. This paper investigated an operating strategy of semi-actuated signal systems for field application, and implemented the functional strategy into the standard signal controller. The performance was evaluated using three measures of effectiveness such as traffic volume, travel time, and the number of delayed vehicle. From the analysis results, traffic volume increased about 9.4% and 11.3% for morning and evening peak periods, respectively. The average travel time was reduced about 6.3% and 7.8% during morning and evening peak periods, respectively because of the expansion of bandwidths for major streets. In addition, the number of delayed vehicles was reduced about 36.4% and 23.9% for morning and evening peak periods, respectively. It is expected that the effectiveness of signal control system can be improved by incorporating a properly designed semi-actuated signal system in regional roadways with directional demand variation.

• Journal of the Korean Institute of Intelligent Systems
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• v.22 no.1
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• pp.12-21
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• 2012

IEEE 802.11 MAC protocol standard, DCF(CSMA/CA), is originally designed to ensure the fair channel access between mobile nodes sharing the local wireless channel. It has been, however, revealed that some misbehavior nodes transmit more data than other nodes through artificial means in hot spot area spreaded rapidly. The misbehavior nodes may modify the internal process of their MAC protocol or interrupt the MAC procedure of normal nodes to achieve more data transmission. This problem has been referred to as a selfish node problem and almost literatures has proposed methods of analyzing the MAC procedures of all mobile nodes to detect the selfish nodes. However, these kinds of protocol analysis methods is not effective at detecting all kinds of selfish nodes enough. This paper address this problem of detecting selfish node using Tsallis-Entropy which is a kind of statistical method. Tsallis-Entropy is a criteria which can show how much is the density or deviation of a probability distribution. The proposed algorithm which operates at a AP node of wireless LAN extracts the probability distribution of data interval time for each node, then compares the one with a threshold value to detect the selfish nodes. To evaluate the performance of proposed algorithm, simulation experiments are performed in various wireless LAN environments (congestion level, how selfish node behaviors, threshold level) using ns2. The simulation results show that the proposed algorithm achieves higher successful detection rate.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.25 no.2
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• pp.363-374
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• 2015

Instrumentation and control(I&C) system has been mainly designed and operated based on analog technologies in existing Nuclear Power Plants(NPPs). However, As the development of Information Technology(IT), digital technologies are gradually being adopted in newly built NPPs. I&C System based on digital technologies has many advantages but it is vulnerable to cyber threat. For this reason, cyber threat adversely affects on safety and reliability of I&C system as well as the entire NPPs. Therefore, the software equipped to NPPs should be developed with cyber security attributes from the initiation phase of software development life cycle. Moreover through cyber security assessment, the degree of confidence concerning cyber security should be measured and if managerial, technical and operational work measures are implemented as intended should be reviewed in order to protect the I&C systems and information. Currently the overall cyber security program, including cyber security assessment, is not established on I&C systems. In this paper, we propose cyber security assessment methods in the Software Development Life Cycle by drawing cyber security activities and assessment items based on regulatory guides and standard technologies concerned with NPPs.

• The Journal of the Korea Contents Association
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• v.14 no.10
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• pp.339-349
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• 2014

The purpose of this study is to find out the effects of career education program using a career camp on elementary school students' career maturity, career self-efficacy, and career barriers. This study was conducted on 50 elementary school students in Busan, who are divided into two groups; one is an experimental group of 25 students and the other is a control group. The result is analyzed by Analysis of Covariance(ANCOVA) for the career maturity, career self-efficacy, and career barriers. The conclusions are as follows: First, the experimental group participated in the career education program using a career camp showed higher level in career maturity as a whole opposed to the control group. Second, the experimental group participated in the career education program using a career camp showed higher level in career self-efficacy. Third, the experimental group participated in the career education program using a career camp showed lower level in career barriers as a whole opposed to the control group. Thus, the results of this study show the importance of developing a model for career education program using a career camp of department of education.

• Proceedings of the Korean Society of Community Living Science Conference
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• 2009.09a
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• pp.101-101
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• 2009

어린이들이 자라나면서 인지지능발달도 중요하지만 현대를 살아가는 훌륭한 성인으로서 성장하여 사회나 조직 속에서 보다 성공적인 삶을 살아가려면 정서지능의 발달은 매우 중요하다. 어린이의 정서지능발달이 농촌체험을 통해서 이루어진다면 농촌측면에서 1석2조의 효과를 가져올 수 있는 것이다. 도시의 어린이들이 농촌체험을 하면서 정서지능을 키워갈 때, 우리 농촌에서는 농촌과 농업의 중요성을 알리고, 체험소득을 얻을 수 있기 때문이다. 따라서 본 연구의 목표는 농촌체험의 정서지능 향상 효과를 구명하는데 있다. 연구방법은 서울시 교육청에 지원학교 가운데 1개 학교를 선정하였으며, 대상학교의 5학년 2개 반 아동 중에 체험지원 아동 30명을 실험집단으로 선정하고, 같은 학교 같은 학년 1개 반 아동 30명을 비교집단으로 선정하였다. 조사도구는 청소년용 EQ검사 척도를 활용하였으며(문용린, 1999), 전혀 그렇지않다(0점)부터 매우 그렇다(4점)까지 총 40개 문항으로 구성되었다. 자료수집방법은 실험집단과 비실험집단 학생을 대상으로 사전 및 사후 질문지 120부가 활용되었다. 분석방법으로는 평균, 표준편차, 공분산분석, 독립표본t-검증, 대응표본t-검증이 활용되었다. 적용 체험프로그램은 초등학생을 대상으로 총 9회차로 포도이야기, 참새와 방앗간, 버섯따기 체험, 고구마 캐기, 허브도감만들기 등과 같은 농촌체험프로그램을 실시하였다. 연구결과 실험집단과 비실험집단에 대한 사전 정서지능 측정에서는 실험집단과 비교집단의 정서지능이 차이가 없는 것으로 나타났다. 농촌체험프로그램을 실시한 후 사후검사에서는 실험집단(99.76)이 비교집단(97.79)보다 정서지능이 높게 나타났다. 실험집단의 정서지능의 농촌체험프로그램 사전 및 사후 결과 정서지능이 총점이 평균 7.08 정도 향상된 것으로 나타났으며, 정서지능에 사전 및 사후 결과의 평균을 하위 영역별로 살펴보면 '정서인식'이 1.76, '사고촉진'이 3.32, '정서지식'이 2.40정도 향상되었다. 하지만 비교집단의 정서지능은 사전과 사후간의 유의한 차이가 없어서 정서지능의 변화가 없는 것으로 나타났다. 결론적으로 농촌체험프로그램을 지속적으로 9회 실시한 후 사전 및 사후 정서지능 검사에서 체험집단이 비체험집단보다 6점이나 더 높게 나타나 농촌체험을 통하여 정서지능 향상에 효과 있음이 구명되었다. 이 결과를 토대로 농촌체험은 정서 지능향상에 효과를 주고 있다고 할 수 있다. 앞으로 이러한 결과가 우리 농촌관광마을이나 체험농장에 홍보자료로 활용되었으면 한다.

• 대한공업교육학회지
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• v.36 no.1
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• pp.47-73
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• 2011

The purpose of the study was to examine cooperative education between industry and school recognized by tentatively called managers of cooperative education, teachers in charge of cooperative education between industry and school, in vocational high school in Incheon Area. In order to accomplish the study purpose, the study conducted a research through questionnaire and examined their recognition for cooperative education between industry and school focusing on curriculum (purpose and content), operational system including supporting system (establishment and operational level) and educational type (process, effectiveness, problems and reinforcing measures). The study conducted a survey using Likert 5 score scale and analyzed the survey results using technical statistics such as frequency, average, standard deviation, etc. From the comprehensive results from the survey, it was found that although outcomes from industry-school cooperation are relatively high, participation is insufficient and intermediating organizations connecting concerned parties and mediating them are not enough because recognition and will of interested parties of industry-school cooperation are not sufficient. In addition, policies, legal and systematical and financial infrastructure for activation and efficiency of industry-school cooperation are not established perfectly, therefore, there are a lot of things to be improvement in operation. In particular, it was observed that establishment of internal organization and infrastructure for the number of workers in vocational training organizations are decisively inadequate.

• Journal of Korea Water Resources Association
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• v.49 no.5
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• pp.439-450
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• 2016

For the design of infrastructures controlling the flood events at ungauged basins, this study tries to find the regional flood frequencies using peak flow data generated by the spatial extension of flood records. The Chungju Dam watershed is selected to validate the possibility of regional flood frequency analysis using the spatially extended flood data. Firstly, based on the index flood method, the flood event data from the spatial extension method is evaluated for 22 mid/smaller sub-basins at the Chungju Dam watershed. The homogeneity of the Chungju dam watershed was assessed in terms of the different size of watershed conditions such as accumulated and individual sub-basins. Based on the result of homogeneity analysis, this watershed is heterogeneous with respect to individual sub-basins because of the heterogeneity of rainfall distribution. To decide the regional probability distribution, goodness-of fit measure and weighted moving averages method from flood frequency analysis were adopted. Finally, GEV distribution was selected as a representative distribution and regional quantile were estimated. This research is one step further method to estimate regional flood frequency for ungauged basins.

• The Journal of the Korea Contents Association
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• v.19 no.11
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• pp.353-364
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• 2019

The purpose of this study was to investigate effect of psychotic patient after applying anger management video and tea gathering program to psychotic patient. This study was an experimental research and used nonequivalent control-group pretest-posttest design. Study subjects were 16 patients for an experimental group and 16 for a control group-32 in total- who were psychotic patients hospitalized in a closed ward in H mental hospital. The measurement variable is an aggressiveness scale, and the effect of the program was measured once after the video program and once after eight tea gathering. Data Analysis methods were real number and percentage, average and standard deviation, χ² test, t-test, paired t-test, and Repeated measure ANOVA. The aggression of an experiment group was significantly lower than the control group(F=14.38, p< .001). Aggressive sub-item, hostility (F=8.53, p< .001), anger (F=6.10, p=.004), verbal aggression(F=7.58, p< .001), physical aggression(F=13.92, p< .001) all of tte experiment group was significantly lower than control group. Based on these results, anger management programs can be used as basic data for anger control in psychotic patient or in various groups.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 1997.11a
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• pp.22-27
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• 1997

특정 제품이 가진 "감성 이미지"란 그 제품의기능과 함께 제품의 감각적 요소 그리고 사용자가 제품에 대해 가진 개념적인 사고 과정의 산물이다. 감성이미지의 국제 비교 연구는 사용자가 특정 제품에 대해 가지고 있는 이미지를 국가나 문화의 맥락 속에서 상호 비교 평가하여, 각 국가나 사회집단을 특팅지울 수 있는 문화적 감성 요소를 추출하고자 하는 것이다. 즉, 각 국가의 생활문화 속에서 사용자들이 제품에 대해 가지는 감성이미지를 계량적으로 규명하고 비교 평가하며, 이 정보를 기초로 각국의 문화와 정서에 적합한 제품 디자인의 모형을 제시하는데 본 연구의 목적이 있다. 구체적인 연구방법은 우선, 자동차 제품을 중심으로 '제품 이미지'를 나타내는 '언어 이미지'스케일을 각 문화 집단 별로 구성한다. 이 제품 이미지에 대비하여, 감성적 요소로 선정된 표준 색채 스케일을 중심으로 나타난 집단의 '이미지'를 상호 비교 평가한다. 이 경우, 각 국가별 집단에서 특징적으로 나타나는 제품의 주요 특성이 감성 이미지로 표현되는 색채 이미지에 어떻게 반영되는가를 상호 비교한다. 이 연구에서는 특정 지역의 사람들이 제품에 적용하는 감성이미지는 색채나 기타 감성 요소에 대한 선호의 문제가 아니라 그 집단의 사람들이 그 제품을 통해 표현하고자 하는 사회적 표상의 반영이라는 것을 보여준다. 따라서, 제품의 이미지가 각 국가별로 공유되는 감성 이미지로 변환되기 위해서는 동일한 의미나 상징성을 지닌 감성 요소를 활용하여 그 제품의 이미지를 포장할 수 있는 방법을 적용하는것이다. 본 연구에서는 각 문화 집단들이 특정 제품에 대해 가지고 있는 사회적 표상(social representation) 체계를 색채스케일에서 나타난 감성 이미지를 통해 구체화하는 것이다.로서는 방전효율의 저하가 없는 양호한 성능을 보였으며, SC의 시범 작동시험을 실차(소나타 1800cc)에 장착하여 수행한 결과 20회 이상의 연속시동에서도 아무런 문제점 없이 잘 동작하였다.되는 데이타를 입력한후 마우스로 원하는 작업의 메뉴를 선택하면 된다. 방법을 타액과 혈청내 testosterone 농도 측정에 응용하여 RIA의 결과와 비교하여 본 바 상관관계가 타액에서 r=0.969, 혈청에서 r=0.990으로 두 결과가 잘 일치하였다. 본 실험에서 측정된 한국인 여성의 타액내 testosterone농도는 107.7$\pm$12.0 pmol／l이었고, 남성의 타액내 농도는 274.2$\pm$22.1 pmol／l이었다. 이상의 결과로 보아 본 연구에서 정립된 EIA 방법은 RIA를 대신하여 소규모의 실험실에서도 활용할 수 있을 것으로 사려된다.또한 상실기 이후 배아에서 합성되며, 발생시기에 따라 그 영향이 다르고 팽창과 부화에 관여하는 것으로 사료된다. 더욱이, 조선의 ${\ulcorner}$구성교육${\lrcorner}$이 조선총독부의 관리하에서 실행되었다는 것을, 당시의 사범학교를 중심으로 한 교육조직을 기술한 문헌에 의해 규명시켰다.nd of letter design which represents -natural objects and was popular at the time of Yukjo Dynasty, and there are some documents of that period left both in Japan and Korea. "Hyojedo" in Korea is supposed to have been influenced by the le

• Science of Emotion and Sensibility
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• v.21 no.1
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• pp.71-82
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• 2018

Stress involves changes in behavior, autonomic function and the secretion of hormones. Autonomic nervous system (ANS) contributes to physiological adaptive process in short durations. In particular, heart rate variability (HRV) analysis is commonly used as a quantitative marker depicting the ANS activity related to mental stress. The aim of this study is to investigate correlations between psychological responses to stress and HRV indices induced by the cognitive stressor. Thirty-three participants rated their mental and physical symptoms occurred during the past two weeks on Stress Response Inventory (SRI), which is composed of seven stress factors that may influence the status of mental stress levels. Then, they underwent the psychophysiological procedures, which are collected electrocardiogram (ECG) signals during a cognitive stress task. HRV indices, the standard deviation of R-R interval (SDNN), root mean square of successive R-R interval difference (RMSSD) and low frequency (LF)/high frequency (HF) ratio were extracted from ECG signals. Physiological responses were calculated stress responses by subtracting mean of the baseline from the mean of recovery. Stress factors such as tension, aggression, depression, fatigue, and frustration were positively correlated to HRV indices. In particular, aggression had significant positive correlations to SDNN, RMSSD and LF/HF ratio. Increased aggressive responses to stress correlated with the increases of all HRV indices. This means the increased autonomic coactivation. Additionally, tension, depression, fatigue, and frustration were positively associated with RMSSD reflecting increases in parasympathetic activation. The autonomic coactivation may represent an integrated response to specific cognitive reactions such as the orienting response.