• Textile Coloration and Finishing
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• v.8 no.3
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• pp.66-71
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• 1996

최근 섬유제품의 소비패턴이 고급화, 다양화, 개성화됨에 따라 이에 부응한 고기능성과 감성을 지닌 제품의 생산이 요구되고 있다. 이러한 요구에 따라 날염은 유행의 변화에 신속하게 대응하고 다양한 색상과 디자인의 변화를 부여함으로써 각광을 받으며 발전하여 왔다. 그러나 소비자의 요구는 화려한 색상과 정교한 디자인을 요구하고 있으며 점차 환경규제가 높아지고 있으므로 여기에 대응한 날염기술의 발전이 시급한 실정이다. 전사날염기술은 이러한 요구를 만족시킬수 있다는 점에서 관심의 대상이 되어 폭발적인 인기를 누리며 발전하여 왔다. 또한 전사날염은 衣料用 섬유소재 뿐 아니라 카페트, 인테리어 제품과 다른 소재에의 적용으로 확대되어지고 있다. 그러나 열전사날염은 천연섬유에 적용하기 어려운 문제점도 있다. 이 글에서는 전사날염의 개요를 알아보고 천연섬유및 그 혼방품에 대한 실용화를 위한 시도방법과 섬유제품이외의 소재에 대한 응용방법에 대하여 알아보고자 한다.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2022.04a
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• pp.255-256
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• 2022

We synthesized catechol-conjugated chitosan (CCC) to study its usefulness as a construction material additive in cement mortar. The degree of catechol conju-gation (DOC_cat) of the synthesized CCC was determined to be approximately14% by UV-vis and ¹H NMR spectroscopy. Furthermore, the hydroxyl and amine groups in CCC could play a crucial role in hydrogen bonding, metal coordination, and cross-linking processes via interaction with adducts from cement mortar. In this study, we observedanimprovement in the compressive strength and absorption rate, suggesting that CCC is a promising candidateforhigh-performance cement mortar.

• Journal of the Korean Society of School Health
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• v.29 no.2
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• pp.71-80
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• 2016

Purpose: The purpose of this study is to examine the association between consuming high-caffeine energy drinks and suicidal ideation in Korean adolescents. Methods: This study used data drawn from the 2015 Korea Youth Risk Behavior Web_Based Survey. The data of 66,068 students in total (33,374 middle school students and 32,694 high school students) were included in the analysis. The $x^2$ test, univariate and multivariate logistic regressions were conducted with the use of SAS 9.3. Results: Adjusted for the variables associated with suicidal ideation, multivariate logistic regression revealed that consuming highly caffeinated energy drinks had a significant effect on suicidal ideation (middle school students, 1~2 times per week: OR=1.24, 3~4 times per week: OR=1.88, 5~6 times per week: OR=2.20, everyday: OR=2.66, high school students, 1~2 times per week: OR=1.26, 3~4 times per week: OR=1.84, 5~6 times per week: OR=2.42, everyday: OR=3.89). Conclusion: This study strongly suggests adolescents be provided with health education and information about consuming an adequate amount of high-caffeine energy drink and the drink's side effects. In addition, regulations and polices on high-caffeine drink intake should be implemented.

• YAKHAK HOEJI
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• v.58 no.6
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• pp.387-396
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• 2014

High Caffeinated Energy Drink (HCED) consumption among adolescents has been exponentially increasing. The intake of HCED may cause various side effects. However, studies regarding intake of HCED in adolescents have been rarely implemented in Korea. The purpose of this study was to investigate HCED consumption patterns among adolescents and prevalence of adverse effects from HCED consumption and to compare them between middle and high school students. The self-reported questionnaire with 31 questions was used to evaluate HCED consumption patterns and adverse effects. Among 792 students, 455 who had drunken HCED were included in the analysis. Nine (4.0%) Middle School Students (MSSs) and 11 (4.8%) High School Students (HSSs) responded that they did not know HCED, and 188 (83.6%) MSSs and 221 (96.1%) HSSs had heard that HCED contains high amount of caffeine. Seventy-four (36.8%) MSSs drank their first HCEDs from curiosity and 63 (31.3%) MSSs to stay awake while studying. However, 134 (61.2%) HSSs consumed their first HCEDs to keep awake while studying, and 57 (26.0%) HSSs from curiosity. Twenty-eight (12.5%) MSSs and 46 (20.3%) HSSs had increase in heart rate, 52 (23.2%) MSSs and 83 (36.4%) HSSs insomnia, and 8 (3.6%) MSSs and 18 (7.9%) HSSs hand and facial tremor. As shown in this study, HCED consumption among adolescents in Korea was high. Thus, Korean government should continuously focus its efforts to educate not only children and adolescents but also their parents for HCEDs in order to increase parents' awareness of HCEDs and conduct education regarding HCED intake at home above all.

• Journal of the Korean Society of School Health
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• v.30 no.1
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• pp.48-58
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• 2017

Purpose: The purpose of this study was to identify the factors associated with energy drink consumption in Korean high school students. Methods: This cross sectional study used the secondary data from the 2015 Adolescent Health Behavior Online Survey. A total of 33,744 high school students were included in the study. Energy drink consumption was measured by asking how often they consumed energy drink during the previous week. Associated factors were categorized into socio-demographic characteristics, psychological characteristics, and health related behavioral characteristics. Complex samples logistic regression was used to analyze the influence of associated factors on energy drink consumption. Results: For socio-demographic characteristics, adolescent boys were likely to consume more energy drink than adolescent girls (Adjusted Odds Ratio [AOR]: 1.351, 95% Confidence Interval [CI]: 1.209~1.510). For psychological characteristics, depressed adolescents were likely to consume more energy drink than their counterparts (AOR: 1.697, 95% CI: 1.537~1.874). For health related behavioral characteristics, cigarette smoking (AOR: 1.336, 95% CI: 1.168~1.528), alcohol drinking (AOR: 1.126, 95% CI: 1.012~1.254), soda drink consumption (AOR: 1.800, 95% CI: 1.565~2.071), sweet drink consumption (AOR: 1.715, 95% CI: 1.431~2.054), and insufficient sleep time a day (AOR: 1.307, 95% CI: 1.197~1.427) were associated with energy drink consumption. Conclusions: In conclusion, energy drink consumption in Korean high school students were associated with such factors as psychological factors (depression) and health related behavioral characteristics (smoking, alcohol, sleep, soda and sweet drink). Thus, intervention programs in schools and communities should focus on these psychological and health related behavioral characteristics.

• Journal of Nutrition and Health
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• v.51 no.5
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• pp.465-479
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• 2018

Purpose: This study examined the frequency of sugar-sweetened beverage consumption in Korean adolescents and the major factors influencing the excessive consumption of sugar-sweetened beverages, such as sociodemographic characteristics, health-related behaviors, psychological characteristics, and dietary habits. Methods: The analysis was performed using the data from the 2017 Korean Youth Risk Behavior Web-based Survey. The subjects included in the analysis were 30,885 middle school students and 31,391 high school students, totaling 62,276. The frequency of sugar-sweetened beverage consumption was calculated by summing the consumption frequencies of soda, high caffeine or energy drinks, and sweet beverages over the last 7 days. The Rao-Scott chi-square test, reflecting information on the sampling design, was used to test the differences in the rate of sugar-sweetened beverage consumption according to each factor. Logistic regression analysis was performed to examine the factors influencing the excessive consumption of sugar-sweetened beverages. Results: The rate of sweetened beverage consumption was higher in boys than in girls, in high school students than in middle school students, in students whose father's education level was lower, in those whose subjective academic performance was lower, and in those who smoked or consumed alcohol. In addition, the rate of sugar-sweetened beverage consumption was higher in those who experienced severe stress, suicidal ideation, sadness, or a sense of despair. The rate of sugar-sweetened beverage consumption was also high in those who skipped breakfast; who frequently consumed fast foods, ramen, or snacks; and who frequently ate meals at convenience stores, supermarkets, or school stores. Conclusion: The rate of sugar-sweetened beverage consumption in Korean adolescents is related to various factors, such as sociodemographic characteristics, health-related behaviors, psychological characteristics, and dietary habits.

• Electronics and Telecommunications Trends
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• v.20 no.4 s.94
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• pp.120-128
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• 2005

인터넷 환경이 급속도로 발전함에 따라 멀티미디어의 범람과 사용자들의 유료 콘텐츠사용에 대한 인식 부족으로 디지털 콘텐츠의 지적재산권 침해가 빈번하게 발생하고 있으며, 이러한 불법콘텐츠들의 무분별한 공유는 디지털콘텐츠 산업 발전을 저해하는 심각한 문제로 대두되고 있다. 이에 따라 최근 디지털 콘텐츠의 저작권 보호를 위해서 저작권 단속활동을 강화하고 있으며 다양한 P2P/웹하드 환경에서도 불법콘텐츠를 검색및 다운로드하고 콘텐츠를 식별하고 불법배포자를 추적할 수 있는 기술을 필요로 하게되었다. 그러나 대부분의 불법콘텐츠들은 약 80%가 P2P, 웹하드, 동호회/카페를 통해서 전파되고 있으며 각 업체별 클라이언트 프로그램의 다양성 때문에 불법콘텐츠의 검색 및 불법복제자 추적이 매우 어려운 실정이다. 불법콘텐츠의 추적 및 차단을 위해 워터마킹/핑거프린팅, 네트워크 모니터링, 매크로 프로그램, 공개 P2P 프로토콜 조작, 페이크 파일 유포 등의 기술들이 사용되고 있다. 본 고에서는 불법콘텐츠 국내외 시장현황과 업체의 기술동향을 살펴보고 불법배포자 추적을 위해 필요한 핑거프린팅과 특징점 기반 콘텐츠 식별 기술에 대해 설명한다. 그리고 P2P와 웹하드에서 불법콘텐츠들을 자동으로 다운로드하고 불법배포자들을 추적할 수 있는 시스템 아키텍처에 대하여 설명한다.

• The Journal of the Convergence on Culture Technology
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• v.9 no.6
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• pp.867-873
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• 2023

In this study, for the purpose of standardized quality control of a cold medicine, we simultaneous analyzed four main chemical components of a cold medicine: acetaminophen, caffeine, methyl paraben, and propyl paraben. The sample was subjected to quantitative analysis using high performance liquid chromatography (HPLC), after pretreatment of four components. The experiment was carried out by using Isocratic elution at wavelength of 270nm. Acetonitrile and water (H₂O) were used as a mobile phase at a flow rate of 1.0mL/min in a commercial C18 reversed-phase column. A volume of 10uL cold medicine were injected into the column with column oven temperature at 35℃. As a result of the experiment, the values of Resolution were 4.983, 1.596, 5.519, and 1.678 respectively-well over Rs >1.5, which indicates that the separation of four components were efficient. In addition, value of symmetry factor of the components was 1.056, 1.069, 1.032, and 1.133 respectively, to show its symmetrical stability. The calibration curve of all four components exhibits good linearity with R² >0.9995 to 0.9999. Furthermore, the limit of detection(LOD) were between 0.0118 to 1.5973 mg/mL, while the limit of quantification (LOQ) were between 0.0353 to 4.7919 ㎍/mL with the recovery rate of 79.6% ~ 120.5%. The results of this study showed an efficient quality evaluation of a simultaneous analysis method for cold medicine components.

• Journal of the Korea Convergence Society
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• v.10 no.5
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• pp.407-415
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• 2019

The purpose of this study was to analyze the dietary habits and health risk behaviors of adolescents who experienced part-time job. For this study raw data from the 13th Youth Health Behavior Online Survey (2017) was examined. Dietary habits and health risk behaviors for 62,823 adolescents were analyzed according to the experience of part-time job. Collected data were analyzed with the SPSS 24.0 program using descriptive statistics and logistic regression analysis, to which the complex sample design was applied. The odds ratio of no fruit intake in adolescents who experienced part-time job compared to adolescents who have not experienced a part-time job was 1.20 (CI: 1.10-1.31). The odds ratio of fastfood intake in adolescents who experienced part-time job compared to adolescents who have not experienced a part-time job was 1.28 (CI: 1.19-1.38). The odds ratio of present smoking in adolescents who experienced part-time job compared to adolescents who have not experienced a part-time job was 3.48 (CI: 3.17-3.84). The odds ratio of present drinking was 3.36 (CI: 3.14-3.96). The odds ratio of high caffeine intake was 1.11 (CI: 1.04-1.19). The odds ratio of high caffeine intake was 2.29 (CI: 2.06-2.55). In developing health education programs for adolescents, it is necessary to include dietary habits and health risk behavior according to part-time experience.

• Journal of Industrial Convergence
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• v.21 no.10
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• pp.29-35
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• 2023

This study aims to find out how the nutrition and eating habit education that Korean adolescents receive at school actually affects and affects their dietary culture. he subject and method of this study was a secondary analysis study using the data from the 18th Korea Youth Risk Behavior Survey(2022). Statistical significance was confirmed using the SPSS program as the frequency of breakfast, reason for skipping breakfast, fruit, high-caffeinated beverage, sweet beverage, fast food, vegetable, milk, water, and late-night snack intake frequency as variables. There was a significant difference in breakfast, fast food, and late-night snacks between the group that received nutrition and eating habits education at school and the group that did not(p<.001). Regarding breakfast consumption, the group that received education showed a higher proportion of students eating breakfast for seven days or more, whereas the group that did not receive education showed a higher proportion of students who did not eat breakfast at all. The group that did not receive education showed a higher proportion of students who did not drink milk, and a higher proportion of students who drank less than one cup of water per day. This study can serve as a foundation for further studies to improve nutritional and dietary education, breakfast consumption, and beverage intake in schools. It was hoped that this study will contribute to developing more effective nutritional and dietary education strategies in schools.