• Journal of muscle and joint health
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• v.29 no.3
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• pp.218-227
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• 2022

Purpose: This study aimed to describe the current level of physical activity (PA) and to explore the relationships between self-efficacy for PA, perceived health status (PHS), attitudes toward aging, ego-integrity and PA in community-dwelling older Koreans. Methods: A total of 164 participants were recruited from community centers, churches, and senior welfare centers in Korea. With questionnaires, a survey was conducted from June 3rd to 22th, 2016. Data were analyzed with descriptive statistics, independent t-test, one-way ANOVA and Pearson's correlation coefficient using SPSS/WIN 22.0 program. Results: The mean amount of total PA was 5,295.33±6,272.38 MET/min/week. The number of subjects engaged in vigorous, moderate, and low-intensity activities were 87 (53.0%), 45 (27.4%), and 32 (19.5%), respectively. Overall, physical activities were different according to the presence of spouse (t=-2.79, p=.006) and the presence of housemate (t=2.03, p=.044). The mean scores of self-efficacy for PA, PHS, attitudes towards aging, and ego-integrity were 17.16±4.45, 9.00±2.41, 68.12±9.28 and 51.62±7.59, respectively. There were significant positive correlations between overall PA and self-efficacy for PA (r=.34, p<.001), PHS (r=.23, p=.003), attitudes towards aging (r=.26, p=.001). Conclusion: Specific programs to promote physical activities in addition to continuous education for improving self-efficacy for PA, PHS, and attitudes towards aging in community-dwelling older adults are needed.

• Journal of Ocean Engineering and Technology
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• v.24 no.4
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• pp.38-46
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• 2010

The wall thinning phenomenon of pipes was simulated as metal loss due to erosion and corrosion. Such wall thinning defects in the pipes of power plants are a very important safety consideration. In this study, we analyzed wall thinning defects that occurred by weld bead of weld zone of boost pump recirculation pipe. From the results of the analysis of pipe failures, numerical analysis was performed by Fluent v6.3.26 using the standard k-$\varepsilon$ model of the weld bead shape, such as an elliptical or a spherical shape, on the inner wall of the pipe. Using the results obtained, we showed the overlap effect by cavitations corrosion and erosion-corrosion at the bottom of the wall-thinning defect.

• Korean Journal of Exercise Nutrition
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• v.23 no.1
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• pp.7-12
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• 2019

[Purpose] The purpose of the study was to determine the combined effects of resveratrol supplementation with high-flow LSS on mitochondrial biogenesis in human vascular endothelial cells. [Methods] Cultured human umbilical vein endothelial cells were treated with 20 μM of RSV. For the shear experiments, cells grown to a >90% confluence were exposed to physiological levels of LSS (5 to 20 dyne/cm2) for 12 to 36 hours using a cone and plate shear apparatus. Gene expressions were analyzed by western blotting. [Results] Depletion of mitochondrial integrity was directly associated with increase in endothelial activation/dysfunction. The expressions of mitochondrial biogenesis regulator genes, such as SIRT1, PGC-1α, and TFAM, and the mitochondrial contents were significantly increased after treatment with both resveratrol and high-flow LSS for 12 hours. However, supplementation of resveratrol to high-flow LSS for a prolonged duration had no synergistic effect on the levels of mitochondrial biogenesis regulator gene expressions and mitochondrial content compared to the LSS treatment alone. [Conclusion] The present study demonstrated that the supplementation of resveratrol to high-flow LSS has no synergistic effects on enhancing mitochondrial integrity in human vascular endothelial cells.

• Journal of Digital Convergence
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• v.12 no.4
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• pp.285-291
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• 2014

Recent, development of wireless communication devices are rapidly and these device being deployed to the user very fast. By this results, a wired network device and the new device such as wireless devices incorporate. Then a demand of new mesh network is rapidly growing. In this wired/wireless integrated network environment, the network is configured automatically, and a user or wireless communication devices must be provided for authentication services. But, these services do not in the real world. Therefore, in this paper, we propose that wired/wireless integrated network environment to automatically configure the network using OpenFlow and the authentication system using Kerberos method. Our proposed system to be able to provide authentication services, confidentiality, integrity services for user or wired/wireless communication devices. And it can be prvented as well to man-in-the-middle attacks.

• International Journal of Computer Science & Network Security
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• v.21 no.12
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• pp.189-192
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• 2021

The article theoretically substantiated, developed and practically implemented a structural and functional model of the formation of ICT competence, taking into account interdisciplinary integration, defines the pedagogical conditions that contribute to the formation of ICT competence: interdisciplinary integration as a basis for building an interdisciplinary course, the content of which is aimed at the formation of ICT competence; the use of IEE, including information, didactic, technological components as a basis for the formation of ICT competence; integration of formal, non-formal and informal education for the implementation the integrity of the acquired knowledge, skills, experience as the basis for the formation of the ICT competence of teachers; creation and use of a set of tasks (educational (UZ), educational and methodological (UMP), educational and professional (UPZ)) as special tools for the formation of ICT competence.

• Korean Medical Education Review
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• v.24 no.3
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• pp.215-230
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• 2022

The purpose of this study was to explore the psychosocial characteristics of academically maladjusted students and the College's current status regarding academic maladjustment based on 4-year medical student cohort data collected from 2018 to 2021 and through interviews with 10 medical education experts using the integrated research method. This study included 223 students who consented to inclusion in the student cohort and participated in the emotional behavior test and college adaptability test of whom 65 students experienced academic maladjustment. Academically maladjusted students had significantly higher scores for social stress, anxiety, sense of inadequacy, attention, hyperactivity, and school maladjustment, and significantly lower scores for relationships with parents, interpersonal relationships, self-esteem, self-confidence, and self-strength. Academic and social integrity, emotional stability, university satisfaction, and university service satisfaction were all significantly lower in the academically maladjusted students than in the non-maladjusted group. The expert interviews indicated that academic maladjustment was mainly recognized as a personal problem, with causes such as lack of motivation and learning methods, vulnerability to stress, lack of social relationships and alienation, lack of support from the family, and insufficient resilience. Systematic support other than counseling for academically maladjusted students is required, and an early diagnosis and preventive intervention are important.

• Korean Journal of Agricultural Science
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• v.49 no.2
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• pp.307-316
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• 2022

The misuse of pesticides has resulted in environmental pollution, which directly or indirectly affects all life on earth. Chlorpyrifos is a chlorinated organophosphorus pesticide that is commonly used in agriculture. The aim of this study was to investigate the effects of chlorpyrifos on the fertilization function of boar spermatozoa. Sperm samples from boars were subjected to varying concentrations of chlorpyrifos from 10 to 200 µM for two incubation periods, 30 min or 2 hrs. The boar spermatozoa were then evaluated for motility, motion kinematics, viability, acrosome integrity, chromatin stability, and generation of intracellular reactive oxygen species (ROS). There was a significant percentage reduction in sperm motility and motion kinematic parameters after both incubation periods (p < 0.05). The proportion of viable spermatozoa decreased after incubation for 30 min and 2 hrs in a dose-dependent manner (p < 0.05). A significantly lower percentage of normal acrosomes was observed in spermatozoa exposed to 200 µM chlorpyrifos over both incubation periods, compared to the controls. The damage to sperm DNA was significantly higher when the exposure time to chlorpyrifos was longer. There was a significant increase in the ROS levels in spermatozoa incubated with chlorpyrifos for 2 hrs (p < 0.05). From the results of the present study, it is concluded that direct exposure of boar spermatozoa to chlorpyrifos altered boar sperm characteristics, suggesting potential toxicity that may affect the male reproductive function.

• The Journal of Korean Association of Computer Education
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• v.5 no.3
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• pp.11-18
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• 2002

It is important to maintain the integrity of the personal information stored duplicately in DBs on the internet sites and to reduce the inconvenience of the user's. So it is useful to develop the integrated-DB supporting the independence of the S/W. In this paper, we investigate the defect of the membership management system on the internet site. Based on the result, we model the personal information management system to manage the membership efficiently, and implement the integrated personal information management system, called IPIMS.

• International Journal of Computer Science & Network Security
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• v.24 no.8
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• pp.105-118
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• 2024

The decision to integrate mobile cloud computing (MCC) in higher education without first defining suitable usage scenarios is a global issue as the usage of such services becomes extensive. Consequently, this study investigates the security determinants of the educational use of mobile cloud computing among universities students. This study proposes and develops a theoretical model by adopting and modifying the Protection Motivation Theory (PMT). The studys findings show that a significant amount of variance in MCC adoption was explained by the proposed model. MCC adoption intention was shown to be highly influenced by threat appraisal and coping appraisal factors. Perceived severity alone explains 37.8% of students "Intention" to adopt MCC applications, which indicates the student's perception of the degree of harm that would happen can hinder them from using MCC. It encompasses concerns about data security, privacy breaches, and academic integrity issues. Response cost, perceived vulnerability and response efficacy also have significant influence on students "intention" by 18.8%, 17.7%, and 6.7%, respectively.

• Journal of Digital Convergence
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• v.14 no.2
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• pp.489-499
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• 2016

The purpose of this study is to attempt to analyze factors affecting elderly persons' life-sustaining treatment preferences, focusing on ego integrity trait. This study used data from Elderly Profiles and Welfare Needs of the Elderly Persons(2014). The analysis sample was 10,451 cases. 86.4 percent of the sample responded that they disagree with life-sustaining treatment. Analysis results are as follows: being female(${\beta}=-.045$, p<.001), the younger(${\beta}=-.024$, p<.05), having more education years(${\beta}=.027$, p<.05), higher satisfaction of life(${\beta}=.022$, p<.05), responding that they had thought about their own funeral(${\beta}=.032$, p<.01), responding that they had used senior centers over the last one year(${\beta}=-.038$, p<.01) are related to disapproval of life sustaining treatment. This research shows that ego integrity trait such as satisfaction of life, or accepting and preparing one's own death, is related to disapproval of life-sustaining treatment.