• Journal of Digital Convergence
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• v.16 no.5
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• pp.257-266
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• 2018

This descriptive research study was conducted to identify the connection between life stress and depression in nursing college students. The data was collected targeting 311 students at colleges of nursing from November 20, 2017 to December 5, 2017, and analyzed through the multiple linear regression analysis method using the SPSS 20.0 statistics program. The results of this study found that there was a difference between life stress and depression in relation to the college life satisfaction among general and health-related characteristics. The level of life stress was the highest in academic problems; and the level of depression was 16.52. According to the results of correlation analysis, all the domains of life stress showed a significantly positive correlation with depression. When it comes to the effects of life stress on depression, there was a significant difference in the relationship with friends and views of value, and the level of explanatory power was 36.2%. In conclusion, this study suggests the necessity of developing intervention programs to reduce life stress and conducting the follow-up studies which are designed to establish various predictors that may act as life stress in college nursing students, based on the results of the effects of life stress on depression in nursing college students.

• Journal of Digital Convergence
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• v.16 no.5
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• pp.341-349
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• 2018

This study was done to identify the significant convergence factors of affecting depression of elderly women in rural area. A total of 161 elderly women aged 65 and over were collected and data were analyzed using multiple logistic regression with SPSS/WIN 21.0. The result indicated that 42.9% of participants were depressed. In logistic regression, significant factors of depression were age(p<.001, OR=1.146), economic status (p=.004, OR=.123), number of family member living together (p=.013, OR=.020), number of social activities (p=.012, OR=.436), number of disease diagnosed (p<.001, OR=3.847), visual function (p=.023, OR=3.867), family support (p=.048, OR=.707), which accounted for 68.6% of the variance. The results of this study can contribute to develop various convergence strategies to prevent the prevalence of depression of elderly women in rural area. Further studies are needed to confirm the level of contribution of visual disability to depression in rural older women.

• Journal of Digital Convergence
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• v.16 no.9
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• pp.187-195
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• 2018

The purpose of this study is to measure quality of sleep (PSQI) and to investigate the affecting factors according to sex in college students. The participants in this study were 214 students from 4 universities. The data were analyzed by t-test, chi-square test and multiple regression using SPSS/WIN 24.0 program. The mean score of quality of sleep was 2.83, for male students are 2.70 and female students 3.06. In multiple regression analysis, physical stress, psychological stress and exercise were significant predictors and explained 25.4% of quality of sleep for male students. In female students, physical stress, psychological stress and drinking were significant predictors and explained 39.2% of quality of sleep. It is necessary to develop and apply education and counseling that can solve factors affecting the quality of sleep of college students.

• Journal of Digital Convergence
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• v.16 no.9
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• pp.309-317
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• 2018

The purpose of this study was to examine influences on grit in the nursing student. The data were collected from 146 nursing students in the H university located Y city and April 16 2018 to April 20 2018. The data were analyzed by descriptive statistics, T-test, ANOVA, Pearson's correlation coefficient, and stepwise multiple regression. Grit was found to be in a significant positive correlation with positive psychological capital and academic achievement. The result of the stepwise multiple regression indicates the positive psychological capital predict 21.1% of grit. Therefore, it is necessary to develop an education program to strengthen the positive psychological capital of nursing students.

• Journal of Digital Convergence
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• v.16 no.9
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• pp.453-463
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• 2018

This research was a descriptive study to investigate the effects of nursing students' biomedical ethics, and critical thinking on attitudes toward withdrawal of life-sustaining treatment. The Participant were 367 nursing students and date were collected from November until December of 2017. Data were analyzed using descriptive statistics, t-test, ANOVA, Pearson correlation, and multiple regression with SPSS/WIN 21.0. There was a significant positive correlation between attitudes toward withdrawal of life-sustaining treatment. Also, the influencing factor on attitudes toward withdrawal of life-sustaining treatment were biomedical ethics, academic grade, subjective health status, and personality types. These factors explained 36.6% of variance. In conclusion, the higher the awareness of biomedical ethics, the more positive attitude toward the withdrawal of lifelong treatment. Based on the results above, we need to develop diverse and systematic educational programs for nursing students.

• Journal of Digital Convergence
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• v.18 no.6
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• pp.345-352
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• 2020

This purpose of this study was to examine relationships among empowerment, academic resilience and positive psychological capital and identify the factors that influence on positive psychological capital in the nursing students. The data were collected from 200 nursing students in the three colleges located Y and S city and 20 April 2019 to 10 May 2019. Data were analyzed by descriptive statistics, T-test, one-way ANOVA, Scheffe test, Pearson's correlation coefficient, and multiple regression using SPSS/WIN 20.0. program. Positive psychological capital in nursing students was significantly correlated with empowerment(r=.610, p<.001) and academic resilience(r=669, p<.001). The result of the multiple regression indicates the academic resilience predict 58.7%(F=19.47, p<.001) of positive psychological capital. Therefore, it is necessary to develop academic resilience increase education program for strategy positive psychological capital in nursing students.

• Journal of the Earthquake Engineering Society of Korea
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• v.7 no.5
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• pp.47-56
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• 2003

In this paper, the cyclic soil behavior model. which can accommodate the cyclic hardening, was developed by modifying the original parallel IWAN model. In order to consider the irrecoverable plastic strain of soil. the cyclic threshold strain, above which the backbone curve deviates from the original curve, was defined and the accumulated strain was determined by summation of the strains above the cyclic threshold in the stress-strain curve with applying Masing rule on unloading and reloading curves. The isotropic hardening elements are attached to the original parallel IWAN model and the slip stresses in the isotropic hardening elements are shown to increase according to the hardening functions. The hardening functions have a single parameter to account for the cyclic hardening and are defined by the symmetric limit cyclic loading test in forms of accumulated shear strain. The model development procedures are included in this paper and the verifications of developed model are discussed in the companion paper.

• Journal of the Korean Institute of Telematics and Electronics D
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• v.35D no.9
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• pp.13-19
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• 1998

It was shown that the bandwidth of T-shaped microstripline fed slot antenna is wider than many of the conventional feeding structures. In this paper, we proposed a new method of enhancing the bandwidth of T-shaped microstripline fed slot antenna with a shunt open stub, and analyzed this antenna by using the FDTD method. We have computed waves and electric field distribution in the time domain, and VSWR, input impedance and radiation pattern in the frequency domaim by Fourier transforming the time domain results. It was found that the bandwidth of this antenna depend on the position(L$_1$) and length(L$_2$) of a shunt open stub. When these parameters are L$_1$=30 mm and L$_2$=33mm, we obtained the maximum bandwidth at the center frequency of 2.3 GHz. From the computed results, the optimum antenna is designed and fabricated. The fractional bandwidth of this antenna was 53.9 %. The measured results were in relatively good accordance with computed values.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.43 no.11 s.353
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• pp.54-67
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• 2006

Low Rate WPAN (Wireless Personal Area Network) designed for low power and low cost wireless communication is an important technology to realize ubiquitous environment. IEEE 802.15.4 and ZigBee Alliance recommend the SKKE (Symmetric-Key Key Establishment) protocol for key establishment and management. The SKKE algorithm has security weakness such as the absence of authentication process or electric signature in key generation and exchange when devices join the role of coordinators. In this paper, we propose new key establishment and security algorithm based on public key encryption to solve low rate WPAN security problems. Also, to improve PLC AMR system's weaknesses in communication reliability and security, we propose a new AMR system model based on IEEE 802.15.4 and we apply our security algorithm to AMR profile for security enhancement.

• Journal of the Korean Institute of Telematics and Electronics
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• v.22 no.1
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• pp.68-74
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• 1985

In this Paper, we present a non-doglegging channel routing system for If layout using standard cells. This system produces a final two-layer wiring pattern in the horizontal track between two rows, each of which is a linear placement of standard cells of identical heights, satisfying the given net list specification. The layout of CMOS cell library Including nine primitive cells used in this paper is represented in CIF (Caltech Intermediate Form) using λ(Lambda) of 2 microns in Mead-Conway layout representation scheme. The cell dimension and 1/0 characteristics such as name, position and layer type of the pins are stored in Component Library to be used in the channel routing progranl, CROUT. 4 subprogram, NET-PLOT, was used to report a schemdtic layout result, and another subprogram, NETCIF was used to with a full-fledged final layout representation in GIF, A test run for realizing a dynamicmaster-slave D flip-flop with set/reset using primitive cells was shown to take 4 CPU seconds on VAX 11/780.