• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.8
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• pp.195-204
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• 2020

The purpose of this study was to explore factors associated with smartphone dependence among adults in their 20s. The data were derived from the 2017 Survey on Smartphone Over-dependence conducted by the Ministry of Science and ICT and the National Information Society Agency. There were 3,684 participants. The data were analyzed by frequency, percentage, mean, standard deviation, independent t-test, Pearson's correlation coefficient, and weighted hierarchical multiple regression analysis. For the results, factors related with higher smartphone dependence of participants were duration (β=.18, p=.000) and frequency (β=.04, p=.000) of usage, gaming (β=.15, p=.000), watching videos (β=.09, p=.000), mobile shopping (β=.05, p=.000), working (β=.05, p=.010), e-mailing (β=.13, p=.000), and sports betting (β=.07, p=.000). Music (β=-.07, p=.000) and adult content (β=-.07, p=.000) significantly reduced their smartphone dependence. SNS (Social Networking Services) (β=.01, p=.358) and instant messengers (β=-.02, p=.330) were not factors related to smartphone dependence. However, instant messengers were the most used by participants and had a strong correlation with working (r=.55, p=.000). This study shows that smartphone usage patterns related with smartphone dependence among adults in their 20s are different from those of children and adolescents. These results could be used to more deeply understand smartphone dependence among adults in their 20s and plan early detection and prevention and care of dependence.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.8
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• pp.315-324
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• 2020

The purpose of this study was to examine the relationship between emotional traumatic experience, stress, depression, and anxiety and to identify factors influencing suicide ideation. Data collection was carried out using a questionnaire survey administered to students from four health colleges in B city and a total of 289 questionnaires. Collected data were analyzed by frequency and percentage, mean, standard deviation, t-test, ANOVA, and multiple regression analysis using the SPSS/WIN program. The results show that there were significant differences in emotional trauma according to the general characteristics of the study subjects (p=.005) and stress related to grades (p=.029). Depression showed significant differences for gender (p=.020), religion (p=.022), and anxiety related to gender (p=.047). Suicidal thinking was not significantly different from the general characteristics. The suicidal ideation of the subjects was significantly correlated with emotional trauma (p<.001), stress (p<.001), depression (p<.001) and anxiety (p<.001). Factors affecting the suicidal ideation of the subjects were emotional trauma (t=4.117, p<.001), stress (t=2.909, p=.004), depression (t=3.421, p=.001), and anxiety (t=2.875, p=.004), and the explanatory power was 34.1%. This study can be used as basic data for the development of a suicide prevention program by identifying correlations between emotional traumatic experience, stress, depression, and anxiety related to suicide ideation and identifying factors affecting suicide ideation. Based on these results, the development of programs to reduce the college student suicide rate is necessary.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.6
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• pp.2484-2490
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• 2012

This study reports on the development and performance verification of cell simulation boards of simulator and the embedded program for board control of the battery management system (BMS) of electric vehicle (EV) cars, which manages the next-generation automotive lithium-ion battery pack. Here, we have improved the speed of the simulator by using operational (OP) amplifier and transistors that were connected in series. In addition, using a digital analog converter (DAC) in each channel, we have improved the performance by channel-to-channel isolation (isolation) as compared to the traditional methods. Furthermore, by constructing a current-limiting protection circuit, one can be protected from disturbance and, by utilizing a precision shunt resistor for the current sensor, we have increased the precision of the current control. In order to verify the performance of the developed simulator, we have performed the experiment 10 times, with values ranging from 0.5 V to 5 V, and a voltage drop step of 0.5 V. Significance analysis of experimental data, and repeatability tests were performed, showing an average standard deviation of 0.001~0.004 V, indicating high repeatability and high statistical significance of the current method and system.

• Journal of the Korean Applied Science and Technology
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• v.36 no.4
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• pp.1460-1471
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• 2019

This study applied the PBL class to the 'Nursing Process and Critical Thinking' courses in the second semester of 2018, and is a primitive research that utilized a single-group, pretest-posttest experimental design in order to examine the effects of the class on Critical Thinking Disposition, Problem Solving Ability, and Professional Self-Concept. Self-report questionnaires were administered to 59 nursing college students in G province. The PBL class consisted of 8 weeks of traditional lectures and 4 weeks of PBL classes. The SPSS/WIN 23.0 program was used for data analysis. Frequency and percentage were used to analyze the general characteristics, and mean, standard deviation and paired t-test were used to analyze the difference between the two groups. As a result, the Critical thinking Disposition of nursing college students was significantly increased(t=4.39, p<.001) after PBL class(3.71±.36) than before PBL class(3.41±.40). The Problem Solving Ability was notably improved(t=3.97, p<.001) after PBL class(3.70±.59) than before PBL class(3.36±.38). The Professional Self-Concept was considerably increased(t=4.84, p<.001) after PBL class(3.22±.50) compared to before PBL class(2.92±.28). Therefore, applying Problem-Based Learning in nursing education to a greater extent is estimated to be effective in increasing the core competencies of nursing college students.

• Journal of the Korean Society for information Management
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• v.17 no.3
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• pp.21-43
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• 2000

Not only the infomatmn seeking bellavmr or acadenuc sources by social scientists was analyzed bnt its eiieclive usmg method was also presented in this paper. For thc purpose, the questionnaires were prepared md admmislered lo social sacnilsin who are the profcsso~s oi a large unlverslty m Taegu, Korea. and the survey for tiler academic environment and its sateiaclion, characterislics, inforn~ahon seeking behavior of academic sources, etc. was conducted. Also, iheir research mlercsts and period, informauon s e e h g behav~or and its dfficulties, reineval melhods, and uslng rrequcncies of current issues elc. were analyzed in lliis paper. The major hdings ol the quanm.live pa on the development 01 academic sources for soaal sciencc study and t11e11 uses for education md study m !hi7 study are: (1) Socid sclenhsts preferred acquiring matenal ihrougli internet. CD-ROM, and PC, etc, lo the traditional methods; (2) They spend approxinmtciy 41 days for collecihg matend they wanl. and each of them has petty various period la collect n~atenal and acquiring methods. (standard deviation : about 35 days); (3) The cilalion kequencies of fore~gu material was hi&r than domeslic one; (4) They, social sc~entists, have a pretty hard time to access and use the theses, journal, magazinc. mmol~ches and m s r o f i , CD-ROM malerid etc. technicdly; (5) The group that has morc sat~sIaclion to thesa aud more fiequenl participant ol seminar seek [or more recen issues of a journal lhrough ihc research modcl of melag. (6) The group thal has higher positioned and 1on.a tenure o: office can access lo shorter time at period lhau the one that bas lhe lowcr and the shortcr group. Also, tutule research topic and recommcndations [or a ~ocial saentlst are proposed and suggested when using a social science material

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.3
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• pp.284-295
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• 2017

This study examined the degree of nurses' image, professional self-concept, and organizational commitment of nursing students to clarify the relationship among these variables. A descriptive research design was used. The participants were 238 nursing students in J city who were surveyed between September 7 and 10, 2016. The data were analyzed using the SPSS WIN 21.0 program, which determined the frequency, percentage, mean, standard deviation, t-test, One-way ANOVA, Scheffe's test, Pearson correlation coefficient, and Stepwise multiple regression analysis. The nurses' image, professional self-concept, and organizational commitment of nursing students showed an average of 4.01, 3.40, and 3.77 points, respectively, based on a five-point scale. There was a statistically significant positive correlation between the nurses' image, professional self-concept and organizational commitment. In addition, there was a positive correlation between the professional self-concept and organizational commitment for nursing students. Two factors explained 56.3% of the organizational commitment of the nursing students. The relative influence affecting the organizational commitment Nurse image, and professional self-concept were found. The nurse image was confirmed to be the largest predictor of organizational commitment.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.12
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• pp.659-669
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• 2016

The purpose of this study was to examine, among quality improvement (QI) department employees, the effects of perception of the healthcare accreditation on job stress and to identify factors affecting turnover intention. Research data was collected between 1 June and 15 June 2016. The sample included QI department employees who had participated in a healthcare accreditation survey. The collected data were analyzed to obtain frequency, percentage, mean and standard deviation results, which were assessed by using Student's t-test, ANOVA, and multiple regression analysis. The scores for QI employees' perceptions of the healthcare accreditation, job stress, and turnover intention were 3.35, 3.66, and 3.32 of the perception by general characteristics. There were significant differences between scores according to gender, age, QI department section, position, and job satisfaction. In addition, job stress and turnover intention scores showed significant differences according to position, age, QI department section, and job satisfaction. A positive correlation was observed between healthcare perception and job stress, while turnover intention was negatively correlated with healthcare perception. The results indicate that the perception of healthcare accreditation positively affects job stress; in contrast, it decreases the number of people intending to change departments. Among the sample of lower level workers, the younger age workers who were employed for more than 10 years expressed lower satisfaction with their job, which indicates that they are affected by their notion of healthcare accreditation more than by other factors. Thus, in order to lessen work stress and employees' thoughts of leaving the department, the QI department should be encouraged to lessen job stress and provide various supports to the employees.

• Journal of the Korean Society for Railway
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• v.10 no.6
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• pp.685-691
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• 2007

In this paper through Honan high-speed railroad which is planned with the north and south axis, we will verify the feasibility of the coordinate conversion using railroad control points after regarding current planned-railroad as the linear central axises. From analysis, distortion of Y axis varies 21 cm to 40 cm diminishing to a gentle straight line, distortion of X axis varies 14 cm to 29 cm. Through a revision, the deviation value between the coordinates were 6 mm to 9 mm and it satisfied the allowable error of national geographic information institute which is following ITRF (International Terrestrial Reference Frame) and cadastral boundary survey (10 cm). consequently the coordinate conversion is possible using railroad control points as common control points.

• Journal of Sasang Constitutional Medicine
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• v.19 no.3
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• pp.51-61
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• 2007

1. Objectives The Face is an important standard for the classification of Sasang Constitutions. We are developing 3D Automatic Face Recognition Apparatus(3D-AFRA) to analyse the facial characteristics. This apparatus show us 3D image and data of man's face and measure facial figure data. So We should examine the Measurement of Facial Figure data error of 3D Automatic Face Recognition Apparatus(3D-AFRA) in Software Error Analysis. 2. Methods We scanned face status by using 3D Automatic Face Recognition Apparatus(3D-AFRA). And we measured lengths Between Facial Definition Parameters of facial figure data by Facial Measurement program. 2.1 Repeatability test We measured lengths Between Facial Definition Parameters of facial figure data restored by 3D-AFRA by Facial Measurement program 10 times. Then we compared 10 results each other for repeatability test. 2.2 Measurement error test We measured lengths Between Facial Definition Parameters of facial figure data by two different measurement program that are Facial Measurement program and Rapidform2006. At measuring lengths Between Facial Definition Parameters, we uses two measurement way. The one is straight line measurement, the other is curved line measurement. Then we compared results measured by Facial Measurement program with results measured by Rapidform2006. 3. Results and Conclusions In repeatability test, standard deviation of results is 0.084-0.450mm. And in straight line measurement error test, the average error 0.0582mm, and the maximum error was 0.28mm. In curved line measurement error test, the average error 0.413mm, and the maximum error was 1.53mm. In conclusion, we assessed that the accuracy and repeatability of Facial Measurement program is considerably good. From now on we complement accuracy of 3D-AFRA in Hardware and Software.

• Journal of Korea Water Resources Association
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• v.42 no.10
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• pp.845-855
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• 2009

In this study, changing characteristics of bed materials downstream of Daecheong Dam by flushing flow was investigated. Flushing flow affected the downstream environment in such a way that the mean diameter of bed material was increased and the standard deviation was decreased. The vertical sorting of bed materials composed of mixed sediment in the sediment box was observed. The surface layer was composed of gravels, and uniform sand material was buried below it. Relative fractions (Di/D50) of the bed material trapped in the box was nearly 1.0 for the bed material coarser than D$_{50}$ at Hyundo gauging station, and was between two values on the bed surface before and after the flushing flow at Bugang gauging station. Ratio of driving force to resisting force for each fraction ($\tau_i^*$) with the faction size maintained constant for the bed material coarser than D$_{50}$ at Hyundo station. At Bugang station, however, it was rapidly decreased. It means that pavement of the surface layer of bed material at Bugang station was developed, with the sediment particles moving downstream uniformly by flushing flow.