• Journal of the Korea Society of Computer and Information
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• v.15 no.6
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• pp.129-138
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• 2010

The purpose of this study was to analyze the difference between Exercise addiction and Affect, and addiction-related potential was investigated. In addition, exercise addiction prevention and positive exercise was to identify. The participants of the study included 312 tennis club member who were more than 20 years old and lived in seoul city. The survey was analyzed by SPSS PC+ for window (version 12.0) which is a statistical analysis program to produce the computational results of this study. Based on the survey, this study could draw such results as follows: First, exercise addiction, gender and age on partial variables were statistically significant differences. A male positive addictions, exercise desire were higher than in female. 50s in the withdrawal symptoms of the variables that showed statistically significant difference participation, and period, frequency, time of exercise addiction showed that in withdrawal symptoms, positive addictions domain in a statistically meaningful differences. Second, social demographic domain in the presence of gender showed significant correlation exercise desire were and exercise participation time in the positive addictions showed significant correlation. Participation frequency and the time involved in retaining all the positive affect and negative affect have found a high correlation. Third, the influence of relation between exercise addiction and affect of tennis participants, exercise desire, positive addiction, showed in a statistically positive affect and negative affect meaningful influence on it.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2006.05a
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• pp.697-700
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• 2006

A sensor and measuring system were implemented to measure two signals that uroflow and urophonography during urination for diagnose the lower urinary tract symptom. The implemented system was composed of the uroflow sensor using the load-cell, the urophonography measurement sensor so as stethoscope type, pre-processing part for sensors signal detection, amplifier and filter, system control parts and PC measurement program. A simulator of the lower urinary system that is experimental equipment implemented for evaluate the implemented system. The two signals were measured using implemented system and analyzed these signal by means of time domain and frequency domain for extraction of the characteristic parameter the most influence of effect according to occlusion of the lower urinary system. Furthermore two signals were measured and analyzed with the subject of 5 healthy adult for clinical application possibility of the implemented system. As a result, the most influence bandwidth of effect according to occlusion of the lower urinary system is $253\sim282Hz$ of the urophonography signal.

• Journal of the Korean Geotechnical Society
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• v.33 no.11
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• pp.5-19
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• 2017

This study has been conducted to improve the conventional compaction management method by measuring the water content and dry unit weight of soil using the Time Domain Reflectometry (TDR) method. In order to verify the measured value of the developed flat TDR system, laboratory tests were conducted on six soils. Also, based on laboratory experiments, field tests were conducted to evaluate the applicability of the developed flat TDR system. Also, a comparison experiment was conducted with the Purdue TDR system. In addition, FE analysis was done to confirm the influence range of the Flat probe. As a result, it was confirmed that the influence range was about 10 cm. As a result of laboratory experiment, the water content ratio showed an error of about 0.4% on the average, and in the case of dry unit weight, it showed an error of about 1.6%. For the field test, the water content ratio and unit weight showed an error of 0.8% and 2.5%, respectively. Through the experimental results, it was confirmed that the measured value of the Flat TDR system is more accurate than that of the conventional TDR system.

• Wind and Structures
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• v.36 no.3
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• pp.175-200
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• 2023

The large eddy simulation (LES) of the flow around a circular cylinder is not only affected by the sub-grid scale (SGS) model but also by the grid resolution of the computational domain. To study the influence of different grids on the LES results, the LES simulations of the flow around a circular cylinder with different grids at Reynolds number (Re) = 3900 was performed. A circular computational domain with different radial growth rates and circumferential and spanwise grid numbers was adopted for the simulations. Meanwhile, the aerodynamic forces, wind pressure coefficients, mean and instantaneous flow fields, and the effect of grid resolution on them were comprehensively analyzed. The results indicate that the lift coefficient, wind pressure coefficient, and recirculation length are significantly affected by the radial growth rate of the grid and the circumferential grid number. The spanwise grid number has a significant influence on the three-dimensionality of the flow and plays an important role in velocity fluctuations in the wake region. Nevertheless, the aerodynamic coefficients and recirculation length are not sufficiently sensitive to the grid number in the spanwise direction. By comparing the results, it can be concluded that suitable and reliable LES results can be obtained when the radial growth rate is 1.03 or 1.05, the circumferential grid number is 160, 200, or 240, and the spanwise grid number is 64. A radial growth rate 1.05, circumferential grid number 160, and spanwise grid number 64 are recommended to reduce the grid amount and further improve the efficiency.

• Korean Journal of Social Welfare
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• v.58 no.1
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• pp.265-290
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• 2006

The purposes of this study are: First, to investigate how the juvenile delinquents in the juvenile justice process evaluate their quality of life. Second, to examining which factors influence their quality of life. To accomplish these purposes, this study used sample of 570 juvenile delinquents in Seoul, Busan, Daejeon who are in the process of the juvenile justice and used the Korean Version of WHOQOL-BREF (brief version of WHO quality of life measure). To examine this purpose, Mean, standard deviation, t-test, One way ANOVA, multiple regression were conducted. The results are as follows: 1) juvenile delinquent in the process of the juvenile justice have complex problems and needs, and their quality of life are lower than the civil in the psychological, social relations, environment domain. 2) The factors influencing their quality of life in the general domain are stigma by parent, violent, undemocratic treatment in the process of the juvenile justice, family income level. But the factors of each domain of quality of life differ to some extent. Statistically significant factors of physical health domain are violent, undemocratic treatment in the process of the juvenile justice, first arrest time, stigma by others, sex, juvenile justice process. Significant factors of psychological health domain are delinquency frequency, stigma by parent, stigma by others, first arrest time, family income level, sex. Significant factors of social relations domain are first arrest time, stigma by parent, delinquency frequency, family income level, stigma by friend. Environment is significantly influenced by family income level, stigma by parent, sex, delinquency frequency, juvenile justice process.

• Journal of The Korean Association For Science Education
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• v.32 no.5
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• pp.879-889
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• 2012

This study aims to investigate the effect of inquiry-based biology program of pre-service science teachers' perceptions on the nature of science and their affective domain of science. For the study, sixty-seven pre-service science teachers were sampled from students who enrolled in the 'Biology Laboratory', Spring semester, 2011. The experimental group taught by inquiry-based experiment and control group by observation-based experiment were composed. At the beginning and end of semester, pre- and post-tests on the nature of science and affective domain of science were administered. The average scores of experimental group were higher than those of control group in the post-test of the nature of science, but there were no significant differences between both groups (p>.05). For the post-test results of both groups' affective domain of science, the experimental group showed significantly higher scores than the control group in self-efficacy in science, importance of science, and importance of science for careers (p<.01). The inquiry-based biology program did not influence pre-service science teachers' perception on the nature of science, while it was effective for positive changes on pre-service science teachers' affective domain of science.

• Geophysics and Geophysical Exploration
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• v.15 no.3
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• pp.129-135
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• 2012

The simultaneous-source full waveform inversion improves the applicability of full waveform inversion by reducing the computational cost. Since this technique adopts simultaneous multi-source for forward modeling, unwanted events remain in the residual seismograms when the receiver geometry of field acquisition is different from that of numerical modeling. As a result, these events impede the convergence of the full waveform inversion. In particular, the streamer-type data with limited offsets is the most difficult data to apply the simultaneous-source technique. To overcome this problem, the global-correlation-based objective function was suggested and it was successfully applied to the simultaneous-source full waveform inversion in time domain. However, this method distorts residual wavefields due to the modified objective function and has a negative influence on the inversion result. In addition, this method has not been applied to the frequency-domain simultaneous-source full waveform inversion. In this paper, we apply a timedamping function to the observed and modeled data, which are used to compute global correlation, to minimize the distortion of residual wavefields. Since the damped wavefields optimize the performance of the global correlation, it mitigates the distortion of the residual wavefields and improves the inversion result. Our algorithm incorporates the globalcorrelation-based full waveform inversion into the frequency domain by back-propagating the time-domain residual wavefields in the frequency domain. Through the numerical examples using the streamer-type data, we show that our inversion algorithm better describes the velocity structure than the conventional global correlation approach does.

• Korean Journal of Culture and Social Issue
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• v.15 no.4
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• pp.487-505
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• 2009

We focused on the missing confirmation domain of the hasteful behavior. We tried to identify the variety of hasteful behavior and the effects of missing confirmation behavior domain of the hasteful behavior on driving behaviors. 388 drivers responded to Hasteful Behavior Questionnaire, Driver Behavior Questionnaire(DBQ), and Driving Experience Questions. Data which have missing values among them were removed, 374 data were analyzed. As a result of factor analysis, hasteful behavior consist of time pressure, uncomfortableness, isolation, boring condition, and expecting rewards, and the DBQ consist of violation, error, and lapse. The components of hasteful behavior was divided into the missing confirmation behavior and the need for achievement domain by the second factor analysis and difference verification of coefficient of correlation. The missing confirmation behavior domain of hasteful behavior had significant influence on error and lapse. The isolation of the missing confirmation behavior domain had a negative effect, and the uncomfortableness of the missing confirmation domain had a positive effect on violation. The time pressure had a negative effect, and the isolation and the uncomfortableness had a positive effect on error and lapse.

• The Journal of Korean Association of Computer Education
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• v.17 no.2
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• pp.31-38
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• 2014

This paper reveals continuity of related events which are occurred and changing from moment to moment accident/events collected from various social media channels. Among them, we especially define the events which have big social influence as "issue event" and investigate the type and characteristics of continuous issue event for each domain. We also introduce a automatic issue detection system in social media text. Based on the extracted issue event results in a particular domain, we analyse the continuity of those events by illustrating in time and place-axis. Furthermore, we identify the relationship between social media in terms of issue events propagation.

• Smart Structures and Systems
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• v.16 no.4
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• pp.683-699
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• 2015

Time Domain Reflectometry (TDR) has been extensively applied for various laboratory and field studies. Numerous different TDR probes are currently available for measuring soil moisture content and detecting interfaces (i.e., due to landslides or structural failure). This paper describes the development of an innovative spiral-shaped TDR probe that features much higher sensitivity and resolution in detecting interfaces than existing ones. Finite element method (FEM) simulations were conducted to assist the optimization of sensor design. The influence of factors such as wire interval spacing and wire diameter on the sensitivity of the spiral TDR probe were analyzed. A spiral TDR probe was fabricated based on the results of computer-assisted design. A laboratory experimental program was implemented to evaluate its performance. The results show that the spiral TDR sensor featured excellent performance in accurately detecting thin water level variations with high resolution, to the thickness as small as 0.06 cm. Compared with conventional straight TDR probe, the spiral TDR probe has 8 times the resolution in detecting the water level changes. It also achieved 3 times the sensitivity of straight TDR probe.