• Journal of Korean Public Health Nursing
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• v.27 no.2
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• pp.357-371
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• 2013

Purpose: The purpose of this study was to investigate the effects of health education based on the health belief model (HBM) to the prevention of noise-induced hearing loss (NIHL) in middle school students. Methods: A pretest-posttest nonequivalent control group was designed for the purpose of this study. A total of 212 students (134 in the experimental group and 78 in the control group) of two middle schools in Seoul were enrolled for the study. Health education of two 45-minutes sessions over two weeks were provided. The data were analyzed by descriptive statistics, Chi-square test, t-test, ANCOVA and repeated measures ANOVA with Bonferroni post-hoc test, using the SPSS version 21.0. Results: There were significant differences between experimental group and control group with reference to perceived susceptibility (F=7.862, p=.006), perceived severity (F=8.291, p=.004), perceived benefits (F=20.311, p<.001), and perceived barriers (F=5.628, p=.019) after health education were provided. We also observed sustained health education effects of perceived susceptibility, perceived severity, perceived benefits, and perceived barriers in the experimental group for up to 4 weeks after health education were provided. Conclusion: The health education to prevent NIHL based on the HBM improved the health beliefs of the middle school students. Health education on the HBM for the prevention of NIHL should be provided at the level of middle school.

• Korean Journal of Health Education and Promotion
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• v.14 no.2
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• pp.125-147
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• 1997

This study was conducted in order to identify the extent to which Health Belief Model (HBM) constructs explain the likelihood of taking preventive behaviors for AIDS among the young adolescents in Korea. HBM was applied as the theoretical framework for developing questionnaire items in this study. The survey instrument included all of the constructs of Health Belief Model, namely, perceived susceptibility, perceived severity, perceived benefit, perceived barriers, cue to actions for preventive behaviors concerning AIDS. Additionally, demographic characteristics of the respondents, their sexual experiences, and AIDS Knowledge Test were included in the study. Each of HBM constructs were developed with a 5-point Likert type scale from l(never agree) to 5 (absolutely agree). The survey was conducted with a total of 247 military men in a city on September 18, 1996, using self-reported questionnaire. The results of the study were summarized as follows: 1. Because the subjects for this study were military soldiers, their demographic characteristics were limited to all men, young age, and ummarried. Educational status was evenly distributed between high school graduates and university students. 2. On the average, the respondents started their first sexual relationship at 18 years old and 82.6% of them did not use condom when having their first sexual experience. Thirty-one percent of the subjects had sexual contact with prostitutes and the average number of sexual contact with prostitutes was 5 times during the past 2 years. 3. The results of AIDS Knowledge Test scores demonstrated that the respondents had a high level of knowledge about AIDS. However, some misconceptions about transmission of AIDS through casual contact were still prevailed. Sixty-six percent of the respondents expressed that people infected with HIV should be isolated from the society in order to protect the general public. 4. All the respondents expressed that they had heard about AIDS before. TV was found to be the source which provided information on AIDS most frequently. 5. Among fundamental constructs of Health Belief Model, scores of perceived benefit of taking preventive action against AIDS marked the highest score, while scores of perceived susceptibility were the lowest. As a result of Multiple Stepwise Regression analysis, 13 variable groups were found to predict the preventive action by 25%. Among them, only perceived benefit variables was the most significant factor to explain preventive behaviors by 17%.

• JSTS:Journal of Semiconductor Technology and Science
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• v.14 no.1
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• pp.1-7
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• 2014

A bidirectional transient voltage suppression (TVS) diode consisting of specially designed $p^--n^{{+}+}-p^-$ multi-junctions was developed using low temperature (LT) epitaxy and fabrication processes. Its electrostatic discharge (ESD) performance was investigated using I-V, C-V, and various ESD tests including the human body model (HBM), machine model (MM) and IEC 61000-4-2 (IEC) analysis. The symmetrical structure with very sharp and uniform bidirectional multi-junctions yields good symmetrical I-V behavior over a wide range of operating temperature of 300 K-450 K and low capacitance as 6.9 pF at 1 MHz. In addition, a very thin and heavily doped $n^{{+}+}$ layer enabled I-V curves steep rise after breakdown without snapback phenomenon, then resulted in small dynamic resistance as $0.2{\Omega}$, and leakage current completely suppressed down to pA. Manufactured bidirectional TVS diodes were capable of withstanding ${\pm}4.0$ kV of MM and ${\pm}14$ kV of IEC, and exceeding ${\pm}8$ kV of HBM, while maintaining reliable I-V characteristics. Such an excellent ESD performance of low capacitance and dynamic resistance is attributed to the abruptness and very unique profiles designed very precisely in $p^--n^{{+}+}-p^-$ multi-junctions.

• Analytical Science and Technology
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• v.31 no.6
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• pp.232-239
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• 2018

Human breast milk (HBM) provides neonates with indispensable nutrition. The present study evaluated the anti-cancer activity of diluted and pasteurized early HBM (< 6 weeks' lactation) on human breast cancer cell lines. The cell lines MCF7 and MDA-MB231 were exposed to 1 % HBM from the 1st, 3rd, and 6th weeks of lactation and exhibited reduced proliferation rates. As controls, breast cell lines (293T and MCF-10A), breast cancer cell lines (MCF-7 and MDA-MB-231), and $CD133^{hi}CXCR4^{hi}ALDH1^{hi}$ patient-derived human cancer stem-like cells (KU-CSLCs) were treated with prominent milk proteins ${\beta}$-casein, ${\kappa}$-casein, and lactoferrin at varying doses (10, 50, and $100{\mu}g$) for 24 or 48 hrs. The impact of these proteins on cell proliferation was investigated. Breast cancer cell lines treated with ${\kappa}$-casein and lactoferrin exhibited significantly reduced viability, in both a dose- and time-dependent manner. Interestingly, ${\kappa}$-casein selectively impacted only cancer (but not normal breast) cell lines, particularly the more malignant cell line. However, ${\beta}$-casein-exposed human breast cancer cell lines exhibited a significantly higher proliferation rate. Thus, ${\kappa}$-casein and lactoferrin appear to exert selective anti-cancer activities. Further studies are warranted to determine the mechanisms underlying ${\kappa}$-casein- and lactoferrin-mediated cancer cell-selective cytotoxic effects.

• The Journal of the Korea Contents Association
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• v.21 no.5
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• pp.22-35
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• 2021

The unprecedented pandemic caused by the COVID-19 has led to a massive global public health campaign to slow the spread of the virus. Thus, this study examines the importance of individual's prevention behavior intention by adapting health belief model(HBM). In addition, we added social variables to understand the prevention behavior better considering the situation in which collective behaviors are important. The online survey results(N=298) showed that higher level of perceived severity, perceived susceptibility, perceived benefits, perceived peril, perceived social norms and lower level of perceived responsibility led to higher prevention behavior intention. Peril was the most influential factor among all the variables. In addition, perceived severity and social norms followed after that. Additional analysis also implied that socio-HBM model we proposed better explained the prevention behavior intention than traditional HBM.

• Journal of the Microelectronics and Packaging Society
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• v.30 no.3
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• pp.88-93
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• 2023

As the demand for High Bandwidth Memory (HBM) increases and the handling capability of larger wafers expands, ensuring reliable Total Thickness Variation (TTV) measurement for stacked wafers becomes essential. This study presents the design of a measurement module capable of measuring TTV across the entire area of a 300mm wafer, along with estimating potential mechanical measurement errors. The module enables full-area measurement by utilizing a center chuck and lift pin for wafer support. Modal analysis verifies the structural stability of the module, confirming that both the driving and measuring parts were designed with stiffness exceeding 100 Hz. The mechanical measurement error of the designed module was estimated, resulting in a predicted measurement error of 1.34 nm when measuring the thickness of a bonding wafer with a thickness of 1,500 ㎛.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.11
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• pp.239-251
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• 2017

This study attempted to identify the health behaviors and related factors of lifestyle related diseases among some public officials. The study subjects were 729 administrative officers of the general public office of the government in D metropolitan city. The data collection was conducted by self-administered questionnaire from February 1 to March 31, 2016. As a result, the health behavior score for lifestyle related diseases showed a significant positive correlation with vulnerability, the effectiveness of health behavior and information obtained from the media about lifestyle-related diseases, while it showed a significant negative correlation with the barriers to health behaviors concerning lifestyle related diseases. As a result of the covariance structure analysis, vulnerability and seriousness about lifestyle related diseases were the most important factors affecting health behavior for lifestyle related diseases. The next most important factors were a family history of lifestyle related diseases, information obtained from the media, effectiveness of and barriers to health behavior, instrumental support, and emotional support. These results suggest that each factor constituting the Health Belief Model (HBM) (perceived vulnerability and seriousness about lifestyle related diseases, perceived effectiveness and barriers to health behaviors, family history of lifestyle related diseases, information obtained from the mass media about lifestyle related diseases, social support network for lifestyle related diseases) is an important factor to consider in practicing health behaviors for lifestyle related diseases. Therefore, it is important to accurately understand the factors related to the practice of the health behaviors of the subjects and to manage them continuously.

• Proceedings of the Korean Nuclear Society Conference
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• 1995.10a
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• pp.333-338
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• 1995

This paper discusses the methods for building up the empirical CHF correlation, Direct Substitution Method (DSM) and Heat Balance Method (HBM). It also includes consideration on the CHF manin, which ran be expressed differently depending on the correlation types in use. Some findings an presented with exemplary calculation.

• The Transactions of the Korean Institute of Power Electronics
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• v.19 no.2
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• pp.99-105
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• 2014

This paper proposes the reliability improvement of H-Bridge Multi-level (HBM) inverter. This reliability can be implemented through modularization of power circuit, distribution of controller, duplication of controller and communication, and continuous operation method in case of power cell failure for driving medium-voltage & high-power induction motor. It is shown that the modularization and expansion characteristics of the HBM inverter are improved since the individual inverter modules operate more independently when using the proposed concept. Also the fault tolerance is increased by using power cell bypass. The proposed design and control methods are described in detail and the validity of the proposed system is verified experimentally in various industrial fields.

• Journal of Korean Public Health Nursing
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• v.18 no.2
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• pp.218-224
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• 2004

This study was conducted to explain adolescents' smoking behavior using Health Belief Model. A cross-sectional study design was used to analyze characteristics and factors that influence smoking behavior among Korean adolescents. A total of 1.535 adolescents attending 21 high schools in one district of Seoul participated in the study. The results indicated that perceived susceptibility, severity, benefits, and barriers were significant in predicting smoking behavior of adolescents. Likewise, the degree of juvenile delinquency, gender, the amount of pocket money, and having smoking parent(s) and friend(s) significantly affect smoking behavior of adolescents. Based on the study results, it is recommended to incorporate HBM components in smoking cessation programs, and to include parents and friends in smoking prevention and cessation programs for high school students in Korea.