• Journal of the Society of Naval Architects of Korea
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• v.54 no.6
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• pp.522-529
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• 2017

Air gun shock system is used as an alternative energy source as part of the attempt to overcome the restrictions of economical expense and environmental damage, etc., due to the use of explosives for the UNDerwater EXplosion (UNDEX) shock test. The objectivity of this study is to develop the simulation technique of air gun shock test for the design of model-scale one for the near field non-explosive UNDEX test through its verification with full-scale SERCEL shock test result. Underwater blasting response analysis of full-scale air gun shock test was carried out using highly advanced M&S (Modeling & Simulation) system of FSI (Fluid-Structure Interaction) analysis technique of LS-DYNA code, and was verified by comparing its shock characteristics and behaviors with the results of air gun shock test.

• Journal of Korean Academy of Nursing
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• v.48 no.3
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• pp.289-297
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• 2018

Purpose: This study aimed to evaluate the usefulness of a behavioral cue checklist (BCC) containing 17 items developed by Wilkes et al. (2010) for identifying potentially violent patients in emergency departments. Methods: This was a prospective observational study to evaluate the usefulness of the Korean version of a BCC (K-BCC) as an assessment tool for predicting patient violence in emergency departments, and was conducted over 4 weeks in a regional emergency medical center located in B City. A total of 1,324 patients were finally analyzed. Results: Logistic regression analysis was performed to investigate whether each item of the K-BCC predicts violence, and a parsimonious set of 8 statistically significant items was selected for the tool. Receiver operating characteristic analysis of the BCC showed that the area under the curve was .97 (95% confidence interval: .94~1.0). The sensitivity, specificity, positive predictive value, and negative predictive value at the cut-off score of 2 were 75.6%, 98.9%, 68.2%, and 99.2%, respectively. Conclusion: The K-BCC was found to be useful in predicting patient violence toward emergency department staff. This tool is simple, and fast to use and can play a significantly role identifying potentially violent patients. Owing to this advance identification, this tool can be helpful in preventing the potential for violence from manifesting as violent behaviors.

• Journal of Digital Convergence
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• v.15 no.6
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• pp.107-119
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• 2017

This article explores early childhood teachers' practices from bottom-up perspectives on the relationship between theory and practice. Results of the review of literature are as follows: 1) From top-down perspectives early childhood teachers' practices and their classroom behaviors have been traditionally defined within the framework of theories of child development, the notion of developmentally appropriate practice, and designed program models; 2) From bottom-up perspectives researchers have a focus on how teachers' practices lead theories and how they construct the act of teaching through reflective thinking; 3) empirical research on preservice and inservice teachers demonstrates that preservice teachers develop their own theories of teaching from their previously held assumptions, gained knowledge from preparation programs, and their individual experiences. It also shows that inservice teachers construct teaching through their implicit knowledge and the use of strategies to negotiate problems. Implications for future studies on teachers's practices are discussed.

• Convergence Security Journal
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• v.14 no.2
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• pp.17-24
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• 2014

Form of backdoor penetration attacks "trapdoor" penetration points to bypass the security features and allow direct access to the data. Backdoor without modifying the source code is available, and even code generation can also be modified after compilation. This approach by rewriting the compiler when you compile the source code to insert a specific area in the back door can be due to the use of the method. Defense operations and the basic structure of the backdoor or off depending on the nature of the damage area can be a little different way. This study is based on the diagnosis of a back door operating mechanism acting backdoor analysis methods derived. Research purposes in advance of the attack patterns of malicious code can respond in a way that is intended to be developed. If we identify the structures of backdoor and the infections patterns through the analysis, in the future we can secure the useful information about malicious behaviors corresponding to hacking attacks.

• Research in Community and Public Health Nursing
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• v.30 no.4
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• pp.400-413
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• 2019

Purpose: The use of video-recording offers important advantages in observing and assessing the relationship between specific behaviors in health care settings. The purpose of this systematic review is to investigate and synthesize the methodological characteristics of studies using video-technology for measuring interactions with the older persons with dementia and staff in long-term care facilities. Methods: We searched Medline, Embase and CINHAL databases for published articles in English using a video-recording method for both staff and the residents with dementia. Quantitative research design studies (e.g., descriptive or experimental studies) were included. Results: Among 5,605 searched papers, a total of 20 studies were selected for this review. Situations of video-recording were providing personal care (n=12), mealtime (n=6), and conversation (n=3). Concepts measured by video-recording were classified into two groups: 1) Staff [care practice by staff (n=13) and communication by staff (n=11)] and 2) residents [communication by resident (n=4), activities of daily life function of resident (n=8), and behavioral and psychological symptoms of dementia (n=10)]. Conclusion: This review demonstrates that video technologies are actively used to evaluate the relationship between quality of care and health outcomes of the elderly with dementia in many international nursing studies. This study provides the foundation for a future research using video-recording technologies to examine the interactions and relationships between staff and the residents in Korean long-term care settings.

• Journal of electromagnetic engineering and science
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• v.15 no.3
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• pp.151-157
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• 2015

The increasing use of mobile phones has raised public concern about the possible biological effects of radiofrequency electromagnetic field (RF-EMF) exposure on the human brain. To investigate the potential effect of RF-EMF exposure on the brain, we examined the behaviors and hippocampal morphology of C57BL/6 mice after sub-chronic exposure to RF-EMFs with a relatively high SAR level (5.0 W/kg). We applied a 2-hour daily exposure of WCDMA 1,950 MHz using a reverberation chamber that was designed for whole-body exposure for 60 days. In the behavioral tests, RF-EMF did not alter the physical activity or long-term memory of mice. Moreover, no alteration was found in the neuronal and glial cells in the hippocampus by RF-EMFs. In this study, we showed that sub-chronic whole body RF exposure did not produce memory impairment and hippocampal morphological alteration in C57BL/6 mice.

• Journal of Korean Public Health Nursing
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• v.9 no.2
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• pp.92-103
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• 1995

This study was done for the purpose of investigating nursing students' health promotion behavior and health status and analyzing the relationship between health promotion behavior and health status. The subjects for this study were 249 nursing students obtained by a convenience sampleing from two Junior Colleges Located in Kangwon-do. The instruments used for this study were health promotion behavior scale developed by the researcher and modified Cornell Medical Index developed by Brodman, Erdmann, Lorge, Wolff & Broadbent. Data were collected from November 21 to December 10, 1994 by means of questionaire. The data were analyzed through the SPSS program by use of descriptive statistics, t-test, ANOVA and Pearson Correlation Coefficient. The results of the study were as follows; 1) The subject's degree of health promotion behavior was about middle level 2) When the relationships between health promotion behavior and their general characteristics were explored, economic status, importance of health & perceived health status were revealed to have significant differences. 3) The subject's health status was at slightly high level, therefore viewed their health as slightly good. 4) When the relationships between health status and their general characteristics were explored, age and perceived health status were revealed to have significant differences. 5) In regard to the relationship between health promotion behavior and health status, psychological health status correlated positively with health promotion behavior (r=.193, p=0.002) ; physical health status correlated positively with psychological health status (r=0.493, p=0.000). But, physical health status did not show a significant correlation with health promotion behavior. In conclusion, it is important for late adolescents including nursing students to lay the foundation for chronic disease prevention by promoting and maintaining healthy lifestyles. Many of the leading causes of disease are preventable, through changes in lifestyle. The need to increase individual awareness of relationships between lifestyle and health and to enhance knowledge regarding the long-term effects of negative health behaviors, is an important nursing strategy for health promotion.

• Journal of Korean Academy of Nursing
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• v.31 no.5
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• pp.921-931
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• 2001

The purpose of this study was to investigate the rate of pregnancy, abortion, delivery and contraceptive use and the relationship between the related factors and the early coitus among Korean teenagers. Method: The subjects of this study were 12,733 teenagers age 13-19 years in 7 major cities and 9 provinces in Korea. Data was collected from 2 Oct., to 28 Oct., 2000 and analyzed by using SPSS 10.0 Program. Results: The results showed pregnancy rate 4.5%, delivery rate 0.5%, abortion rate 0.4%. Adolescent girls who experienced coitus relatively went to vocational school, coeduaction school, night school in the general characteristics (p=0.000). Adolescent girls who experienced coitus tend to go to video room (18.5%), go the singing room (60.7%), the bar (54.8%), petting with the partner during the dates. There were overlapping juvenile delinquencies such as drinking (89.2%), pornography (65.3%), bond inhalation (2.7%), leaving homes (43.7%), smoking (14.5%), cyber sex (70.8%), phone sex (12.9%). Adolescent girls who experienced coitus were more suffering from Wangtta (26.1%) than who had not. They showed significant positive attitudes toward coitus; such as feeling of excitement (6.6%), nature (37.9%), beauty (8.7%). On the other hand, they had more guilty (2.8%) than the inexperienced (p=0.000). The main factors relating to early coitus were 'to confirm love' (46.9%), 'afraid of rejection' (32.2%). They think the benefits of coitus were 'more intimacy with boyfriends' (20.6%), 'satisfaction of curiosity' (16.8%). The losses on coitus were 'worry about pregnancy' (73.7%) and 'unability to refuse sexual contacts' (28.7%) Conclusion: It could be concluded that it is necessary to plan different sex education programs according to general characteristics and delinquency behaviors of teenage girls in Korea.

• Journal of Korean Academy of Nursing
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• v.18 no.2
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• pp.135-152
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• 1988

Since 1950s' we have come to take a deep interest in matrimonial communication as the theories of family therapy though communication came to extend. In the rapid changing modem society, especially, the dysfunctional aspect of the communication rather than functional one tends to grow high because married couples who suffer from isolation and solitary in social life want to satisfy their unfilled desire through matrimonial communication and apt to be hurt easily by their attitudes and behaviors. When these discrepancies in dysfunctional aspect take place repeatedly, the conflict between married couple which is bad in their psychological effects go from bad to worse and influence their somatic symptoms. This study was attempted to examine the relationship between dysfunctional communication patterns of married couple and complaint degree of housewives psychosomatic symptoms and to use as basic materials focusing on nursing system centered around family, which aims to reach the family centered culture of Korea. To gain the aims, some surveys were peformed at Seoul, Chinju and some areas of Kyeongki province, and the study materials were collected from 70 wives who were encountered by 12 pastrolists majoring in clinical pastrol of ‘Y’ Theological Graduate School and from neurotic patients of those who visited the internal Medicine depts of 1 university hospital and 4 hospitals ‘J’ city, among whom they used dysfunctional communication pattern in their married life. And data collection was peformed from Feb. 22, 1988 to April 22. In the survey, four types of dysfunctional communication presented by Song Sung-Ja were used as the survey tool. And the complaint degree on Psychosomatic symptoms was measured by the classification according to the complaint degree of housewives's psychosomatic symptoms through pretest after content validity, in which the housewives who dysfunctional communication wert surveyed. To learn matrimonial Communication patterns that have an effect on housewives psychosomatic symptoms in the surveyed.

• Convergence Security Journal
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• v.12 no.6
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• pp.61-67
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• 2012

Accordingly the number of smart-phone-based malicious codes is also increasing and their techniques for malicio us purpose are getting more clever and evolved. Among them, the malicious codes related to Android take the major portion and it can be estimated that they are based on open source so that the access to the system is easy. Intent is a technique to support the communication between application's components by transmitting message subjects in Android. Intent provides convenience to developers, but it can be utilized as security vulnerability that allows the developer with a malicious purpose to control the system as intended. The vulnerability of intent security is that personal information can be accessed using discretionally its proper function given to application and smart phone's functions can be maliciously controlled. This paper improves with the Intent security vulnerability caused by the smart phone users' discretional use of custom kernel. Lastly, it verifies the malicious behaviors in the process of installing an application and suggests a technique to watch the Intent security vulnerability in realtime after its installation.