• Journal of the Korean Wood Science and Technology
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• 제47권5호
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• pp.597-606
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• 2019

Cellulose nanocrystals (CNCs) were successfully isolated from oil palm fronds (OPFs) using different concentrations of ammonium persulfate (APS), and their characteristics were analyzed by Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), X-ray diffraction (XRD) analysis, and thermogravimetric analysis (TGA). APS oxidation effectively isolated CNCs with rod-like morphology in nanometer scale. The dimensions of the CNCs decreased with increasing APS concentration. FTIR and XRD analyses revealed that all the CNCs showed crystals in the form of cellulose I without crystal transformation occurring during APS treatment. The relative crystallinity of the CNCs increased with increasing APS concentration, whereas their thermal stability decreased. An APS concentration of 2 M was found to be optimal for isolating the CNCs.

• 보건교육건강증진학회지
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• 제27권4호
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• pp.153-163
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• 2010

Objectives: Analysis and understanding on the health trend of college and university students are paramount to creating healthy campus communities. We evaluated the change of health status, health behavior, and influencing factors among them in the last ten years. Methods: Using the results of the ACHA-National College Health Assessment from 2000 to 2009, we reanalyzed the trend of health condition, health behavior, and health risk factors in linear regression model. Results: In general health of college and university students, major health problem were allergy problems, back pain, and sinus infection. Academic impacts were stress, sleep difficulties, cold/flu, concern for troubled friend or family member, relationship difficulty, and internet use or computer games. Although regular exercise was decreasing among them, it were more likely to have never smoking, no sexual partner, and eating of fruits/vegetables as time passed (p<0.05, p<0.01). Obesity and sleeping difficulty were increasing, while it were less likely to have feeling very sad, feeling hopelessness, and considering attempting suicide (p<0.05, p<0.01). Conclusion: These data expand the understanding of the health needs and capacities among young adults. For Korean college and university students, it is necessary to standardize the data-collection survey to set the college health and healthy campus.

• International Journal of Advanced Culture Technology
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• 제10권4호
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• pp.137-147
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• 2022

In this study, for students who gave up their studies midway through college, we investigate the reasons for dropping out of college, analyze the factors that caused students to drop out, and suggest improvement measures to effectively increase the recruitment rate of enrolled students. This study explores measures to increase student enrollment in community colleges. For this purpose, it conducted a survey of students who dropped out of G College between 2018 and 2020 from June 28 to July 9, 2021. Its analysis is based on the results of 53 students who participated in the survey. First, our results suggest that programs to develop interpersonal relationships between students, faculty, and staff are necessary. Such programs will cultivate a culture of solidarity and collective identity among students, which in turn will reinforce positive experiences in college. Moreover, by developing systems to form relationships between faculty and students, colleges can have a feedback mechanism, such as an open-study program, through which they learn what the students want and need. Through this effort, colleges can help their students adjust to campuses and enhance student satisfaction in college. Second, it is necessary to develop various extracurricular programs not only for freshmen but existing students and to run hobby and leisure activity programs. To have continuous, standing extracurricular programs instead of one-time events, colleges should set up specific goals, delivery methods and strategies. Third, colleges should renovate old and outdated buildings and facilities on campus to enhance the quality of campus life. Moreover, more comprehensive improvement of facilities and a campus environment by having various convenient and leisure facilities that meet the needs and demands of students. Fourth, it is suggested to develop programs or systems that help students to more fully engage in campus lives and activities, which in turn increases confidence and self-efficacy among students. Through such programs, students can better adjust to their majors and, therefore, will be less likely to drop out of college.

• Nutrition Research and Practice
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• 제17권5호
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• pp.1019-1027
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• 2023

BACKGROUND/OBJECTIVES: Sustainability has become one of the top priorities in the foodservice industry. With an increase in consumer interest in sustainability and educational opportunities in higher education, it is important to know what sustainable practices are implemented in campus dining and how sustainable practices affect consumers' responses. This study aims to identify the key sustainable practices in the campus dining context, and investigate the relationship by applying the stimulus-organism-response framework to determine whether the key sustainable practices influence consumers' perception and behavioral intentions. SUBJECTS/METHODS: The self-administered online survey was distributed to college students in 8 dining halls at a large southeastern university in the United States from September 20-October 10, 2019. A total of 382 valid questionnaires were collected, and factor analysis and multiple regressions were utilized to test the research model. RESULTS: This study identified 4 dimensions of campus sustainability with a total of sustainable practices: sustainable food, waste management, energy/water conservation, and recycling/reuse. Three dimensions of sustainable campus practices (i.e., sustainable food, waste management, recycling/reuse) played a significant role in consumers forming a perceived value while energy/water conservation did not significantly influence the consumers' perceived value toward the campus dining. Waste management was identified as the most important practice to enhance consumers' perceived value (β = 0.330). Using sustainable food and recycling/reuse were ranked second and third, respectively (β = 0.262, β = 0.154). The findings confirmed the significant positive relationship between perceived value and revisit intentions. CONCLUSIONS: The findings support the inclusion of dining sustainability as a critical component in explaining college students' perceived value and revisit intention toward campus dining. Furthermore, this study provides practical implications for university administrators and foodservice operators to consider the key sustainable practices to meet the consumers' value and revisit intentions.

• 한국콘텐츠학회논문지
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• 제19권10호
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• pp.442-451
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• 2019

본 연구는 캠퍼스 금연 교육 프로그램에 참여하고 금연에 성공한 대학생들의 장기금연 효과를 파악하기 위하여 실시되었다. 연구 대상자들은 2016년부터 2018년까지 서울시 소재 일개 대학에서 36주에 걸쳐 진행되는 캠퍼스 금연 교육 프로그램의 2차 자료와 참여 후 금연에 성공한 전체 금연성공자중, 연구에 참여하기로 동의한 30명이었다. 캠퍼스내에서의 흡연이 전면 금지되어 있는 서울시내 일개 대학교의 금연 교육 프로그램은 금연관련 교육과 상담, 주1회 소변 내 Cotinine 검사, 금연장학금 지급으로 구성되었다. 참여자의 평균 금연 성공률은 1차시 50.17%, 2차시 44.16%, 3차시 77.30%로 나타났으며, 2차 성공이후에 금연이 고착화되는 경향이 관찰되었다. 본 연구에서 금연에 성공한 이후, 12개월 이상 금연을 유지하고 있는 참여자는 51.22%, 흡연 재발한 참여자는 무응답 흡연자를 포함하여 48.78%이었다. 금연유지의 가장 큰 성공요인은 금연의지(28.57%)였으며, 금연유지의 가장 큰 실패요인은 스트레스(66.67%)로 나타났다 대학생을 위한 캠퍼스 주도적 금연 교육 프로그램은 대학생 흡연자의 금연유도 뿐 아니라 금연을 습관화하여 장기금연 유지자로 전환시키는데 효과적인 프로그램임을 확인할 수 있었다.

• Kyungpook Mathematical Journal
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• 제49권3호
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• pp.435-450
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• 2009

On page 366 of his lost notebook [15], Ramanujan recorded a cubic continued fraction and several theorems analogous to Rogers-Ramanujan's continued fractions. In this paper, we derive several general formulas for explicit evaluations of Ramanujan's cubic continued fraction, several reciprocity theorems, two formulas connecting V (q) and V ($q^3$) and also establish some explicit evaluations using the values of remarkable product of theta-function.

• Structural Engineering and Mechanics
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• 제40권3호
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• pp.335-346
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• 2011

This paper deals with the bifurcations of non-semi-simple eigenvalues at critical point of Hopf bifurcation to understand the dynamic behavior of the system. By using the Puiseux expansion, the expression of the bifurcation of non-semi-simple eigenvalues and the corresponding topological structure in the parameter space are obtained. The zero-order approximate solutions in the vicinity of the critical points at which the multiple Hopf bifurcation may occur are developed. A numerical example, the flutter problem of an airfoil in simplified model, is given to illustrate the application of the proposed method.

• Korean Journal of Mathematics
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• 제28권1호
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• pp.89-104
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• 2020

In this paper, we connect (α, β) union soft sets and their ideal related properties with KU-algebras. In particular, we will study (α, β)-union soft sets, (α, β)-union soft ideals, (α, β)-union soft commutative ideals and ideal relations in KU-algebras. Finally, a characterization of ideals in KU-algebras in terms of (α, β)-union soft sets have been provided.

• 한국실내디자인학회논문집
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• 제19호
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• pp.59-69
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• 1999

Colleges and Universities are one of our whole life educational facilities for the disabled regarding job training opportunities are academic goal achievement. However it is usual for the disabled students to be deprived of their opportunities to study and to prepare their future life on campus because of physical obstacles of campus environment. Therefore this study provides what are the physical obstacles on campus, how to use the college's facilities for the disabled to achieve their academic goals and the have job training opportunities just like ordinar students, and how improve the campus environment which is based on concept Universal Design

• 대한화학회지
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• 제63권5호
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• pp.352-359
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• 2019

The most important parameter of organic molecules for energy harvesting application focuses mainly on their band gap (HOMO-LUMO). In this report, we synthesized differently substituted 1,3,5-triazine based organic molecule which on future processing can be used in organic electronics like solar cells and OLED's. The energy gap of the synthesized novel analogue was calculated using cyclic voltammetry, UV-Visible spectroscopy and compared with density functional theory (DFT) studies.