• Journal of the Society of Naval Architects of Korea
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• v.31 no.1
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• pp.1-13
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• 1994

Procedures for the development of a preswirl stator-propulsion system for a VLCC 300K are described in this paper. The preswirl stator-propulsion system is one of the compound propulsor systems, which is used for the purpose of recovering propeller slipstream rotational energy by locating a stator in front of the propeller. The preswirl stator-propulsion system can be considered as a most reliable energy saving device because of its simple mechanism. Five stators are designed for the existing hull form and propeller, and their effects are verified by model tests. Open-water test result of the preswirl stator-propulsion system at the cavitation tunnel show $4{\sim}6%$ increase of open-water efficiency compared to that of a propeller without stators. Maximum 6.5% decrease of delivered power at the design speed(15.5knots) is expected with the designed stator based on the analysis results of resistance and self-propulsion test at the towing tank.

• Journal of the Korea Society of Computer and Information
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• v.25 no.4
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• pp.149-156
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• 2020

In the Fourth Industrial Revolution, successful cases using big data in various industries are reported. This paper examines cases that successfully use big data in the medical industry to develop the service and draws implications in value that big data create. The related work introduces big data technology in the medical field and cases of eight innovative service in the big data service are explained. In the introduction, the overall structure of the study is mentioned by describing the background and direction of this study. In the literature study, we explain the definition and concept of big data, and the use of big data in the medical industry. Next, this study describes the several cases, such as technologies using national health information and personal genetic information for the study of diseases, personal health services using personal biometric information, use of medical data for efficiency of business processes, and medical big data for the development of new medicines. In the conclusion, we intend to provide direction for the academic and business implications of this study, as well as how the results of the study can help the domestic medical industry.

• Geophysics and Geophysical Exploration
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• v.8 no.1
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• pp.112-117
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• 2005

Geophysical logging is routinely undertaken as part of most coal mine exploration programs. Currently, the main application for the logs is to determine coal seam depth and to qualitatively estimate coal quality, lithology, and rock strength. However, further information can be obtained, if quantitative log interpretation is made. To assist in the uptake of quantitative interpretation, we discuss log responses in terms of the mineralogy of the clastic sedimentary rocks frequently found in the Australian black coal mining areas of the Sydney and Bowen Basins. We find that the log responses can be tied to the mineralogy with reasonable confidence. Ambiguities in the interpretation will be better resolved if a full suite of logs is run. A method for checking for internal consistency, by comparing calculated and observed velocities, is also described. A key driver for quantitative interpretation is geotechnical characterisation. We propose a classification system for clastic rocks that takes into consideration physical rock properties that can be inferred from geophysical logs.

• Geophysics and Geophysical Exploration
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• v.8 no.1
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• pp.73-77
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• 2005

To correctly invert and interpret Surface Nuclear Magnetic Resonance (SNMR) data collected in conductive terrains, an accurate estimate of subsurface conductivity structure is required. Given such an estimate, it would be useful to determine, before conducting an SNMR sounding, whether or not the conductivity structure would prevent groundwater being detected. Using SNMR forward modelling, we describe a method of determining the depth range from which most of the SNMR signal originates, given a model of subsurface conductivity structure. We use the method to estimate SNMR depth penetration in a range of halfspace models and show that for conductive halfspaces ($<10{\Omega}.m$) the depth of penetration Is less than 50 m. It is also shown that for these halfspaces, increasing coincident loop size does not significantly improve depth penetration. The results can be used with halfspace approximations of more complicated ID conductivity structures to give a reasonable estimate of the depth range over which signal is obtainable in conductive terrains.

• Journal of Digital Convergence
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• v.19 no.12
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• pp.661-673
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• 2021

This study is a descriptive study to understand the effect on the health behavior compliance of men who got coronary intervention, focusing on the elapsed period. The subjects of this study were 249 men who underwent coronary intervention at a university hospital, and the collected data were analyzed using Stepwise multiple regression. As a result of the study, the influencing factors the implementation of healthy behaviors were self-regulation(β=0.35, p<.001), risk factors among educational request(β=-0.26, p<.001), and the elapsed period(β=0.19, p<.001), marital status(β=0.15, p=.001), educational level(β=-0.12, p=.035), and the total explanatory power was 29.1%. IIn order to increase the health behavior performance of male patients who underwent coronary intervention, it is necessary to develop a program that can strengthen the autonomous motivation of subjects with high severity and elapsed time of less than 1 year and more than 1 year.

• Journal of the Korea Convergence Society
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• v.12 no.12
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• pp.125-137
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• 2021

This study is a descriptive investigation study to identify the Convergence factors of the subjective health status, communication with medical personnel and drug misuse on medication adherence. The subjects of this study were 179 senior citizens who used community elderly welfare centers. Data were collected from January 13, 2020 to January 17, 2020. Data analysis was performed using frequency, percentage, mean, standard deviation, t-test, ANOVA. Post-Hoc Test Was performed using Scheffe test, Pearson's correlation coefficients and multiple regression analysis. The regression equation of this study explained 24% of medication adherence. Drug misuse(𝛽=-4.32, p=<.001) was the factor that had the greatest influence on the medication adherence, followed by the presence or absence of chronic disease (𝛽=-3.04, p=.003), marital status (𝛽=2.64, p=.009), and communication with medical personnel (𝛽=2.26, p=.025 ) in that order. Therefore, it is necessary to establish a convergence system of medication adherence for the elderly using community welfare centers.

• Journal of Digital Convergence
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• v.19 no.10
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• pp.357-365
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• 2021

This study is a descriptive survey research for identifing double mediating effect of ego-integrity and cultural competency and the moderated mediation effect of Wisdom on the relationship between basic pychological needs and successful aging. The participants were 211 elderly people aged at least 60 from June 2020 to March 2021. Data were collection by self-report questionnaire. Data was analyzed by Hayes' number 6 and 91 models using the SPSS/25.0 program and SPSS PROCESS MACRO. According to the study, the ego-integration and cultural competence were effected to double mediated in successful aging, and the ego-integration and cultural competence were effected to successful aging through moderated mediation by wisdom. Therefore, it is needed to develop welfare policy and strategy for the elderly to enhance ego-integration and cultural competence by effort to satisfy basic pychological needs and wisdom.

• Journal of the Korea Convergence Society
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• v.12 no.12
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• pp.573-581
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• 2021

This study aims to investigate the awareness, nursing needs, and nursing satisfaction of conscious sedation, and their relationships in the guardians of hospitalized children receiving conscious sedation. Data were collected from 120 guardians of children who were admitted to the pediatric ward of University Hospital C in D city from July 6 to October 6, 2016 and received conscious sedation as a pretreatment for diagnostic tests. The result showed that the guardians' awareness was relatively low (2.49±0.83) and nursing needs (4.53±0.40) was found to be significantly higher than nursing satisfaction (3.81±0.56)(p<.001). Awareness showed a significant positive correlation with nursing satisfaction (r=.18, p=.048) and there was a significant positive correlation between nursing needs and satisfaction (r=.20, p=.033). This result suggested that in order to improve the nursing satisfaction of the guardians, it is necessary to understand the awareness and nursing needs of the guardians on conscious sedation. In addition, the development of customized nursing intervention should be carried out based on the awareness and nursing needs.

• Journal of the Korea Convergence Society
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• v.12 no.12
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• pp.583-594
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• 2021

This study is a descriptive research study conducted to understand the effects of hospital nurses' COVID-19 risk perception, media dependence, government trust, resilience, and Socio-psychological stress on COVID-19 prevention behavior. Data were collected from 200 nurses at university hospitals, and the collected data were analyzed using descriptive statistics, t-test, Pearson's correlation analysis, ANOVA, and multiple regression analysis using the SPSS 24.0 program. The average age of the subjects was 29.8 years old, the hospital experience was 6.6 years, and the prevention of COVID-19 was high with 4.3 points. COVID-19 prevention behavior showed positive correlation with COVID-19 risk perception, resilience, and media dependence and negative correlation with socio-psychological stress. Factors influencing COVID-19 prevention behavior were COVID-19 risk perception, resilience, socio-psychological stress, and media dependence. To ensure that hospital nurses' COVID-19 prevention behaviors can be continued, it is necessary to appropriately manage COVID-19 risk perception and media dependence, and to develop and apply an intervention program to strengthen resilience and reduce socio-psychological stress.

• Journal of Digital Convergence
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• v.19 no.9
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• pp.445-451
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• 2021

The purpose of this study was to examine the effect of nursing students' abilities of communication and self-reflection on their attitudes toward mental illness. Data were collected from September to October in 2020. In total, 180 questionnaires were collected, and 170 questionnaires among them were used for analysis, excluding 10 with poor responses. As a result, nursing students' communication ability, self-reflection, and attitude toward mental illness showed a significant positive correlation. Nursing students' communication ability and self-reflection were major factors influencing their attitudes toward mental illness, which explained 49% of the total variance. Continuous education to improve students' communication ability and self-reflection level within the nursing department's curriculum will be needed to pursue nursing students' positive attitude toward mental illness. Also, additional education program to improve students' attitudes toward mental illness will be required.