• 한국환경과학회지
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• 제23권8호
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• pp.1455-1462
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• 2014

The purpose of this study is to examine green consumer behavior (green product purchasing behavior and green consumption life) affected by demographical characteristics, and cognition degree of green life (cognition of a green indicator, a green life catalyst system, and environmental problems). It's also to promote strategy and suggest effective activation plans for the vitalization of green consumer behavior. To carry out the task, verification of credibility, multiple regression analysis, two-step cluster analysis, and multinomial logistic analysis were used. The results are as follows: First, the factors that effect green product purchasing behavior were gender, age, cognitive of a green indicator, carbon points system, electricity peak hour system, and seriousness of environmental damage due to lifestyle. Second, the factors that effect green lifestyle were gender, age, carbon grade indicator system, cognition of a green system, and the seriousness of environmental damage due to lifestyle. Third, the comparative group characteristic analysis showed low rates for careless green consumer behavior groups compared to the passive green consumer behavior groups in cognition of a green indicator, green system, and environmental problems. For active green consumer behavior groups, the analysis showed high rates in cognition of carbon grades, eco-labeling, electricity peak hour system, and environmental damage due to lifestyle. In order to encourage green consumer behavior, it's evident that cognition of a green indicator, a green life catalyst system, and environmental problems need to be improved through strategic education and continuous encouragement.

• 한국자원식물학회지
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• 제18권3호
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• pp.505-511
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• 2005

삼백초 수확 후 광 노출정도에 따른 선도유지 및 유효성분 함량 변화를 구명하여 품질향상을 위한 기초자료를 제공하고자 시험을 수행한 결과, 건물율은 잎, 줄기, 꽃 모두 광노출 시간이 길수록 높았으며, 색도중 명도는 광노출시간이 짧을수록 높았으나, 적색도는 상반된 경향이었다. 황색도와 채도는 건조전에는 광노출 2시간시에, 건조후에는 광노출시간이 짧을수록 높았으나, 경엽 탕전시에는 상반된 경향이었고, 광노출 시간이 짧을수록 rutin, quercitri 의 함량과 떫은 맛이 많았고, 품질 선호도와 경엽 탕전 시 기호도도 우수하였다.

• 한국농공학회논문집
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• 제57권5호
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• pp.37-42
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• 2015

In order to provide fundamental data for the creation of environmental design criteria for horticultural facilities, we developed a method to easily calculate the seasonal heating load applying heating degree-hour while taking into account heating load reductions due to solar radiation in the daytime, and reviewed through greenhouse heating experiments. Heating experiments and measuring meteorological environments were carried out in three greenhouses located at Buyeo, Cheonan, and Buan, and we derived reduction factors of seasonal heating load according to hours of sunshine. Daily mean hours of sunshine during the experiment period in each of the greenhouse was 4.0 to 8.3 hours, and the reduction factor of seasonal heating load was 0.64 to 0.85, has been shown to decrease linearly with the increase in hours of sunshine. A method to estimate the seasonal heating load for greenhouses was developed using the reduction factor of seasonal heating load derived from the greenhouse heating experiment, including the adjustment factor of seasonal heating load according to hours of sunshine. The developed method was validated through heating experiments in a greenhouse located at Cheonan. Greenhouse seasonal heating loads calculated by the method developed in this study were analyzed to show the estimate error of 1.2 to 5.0%. It showed that the accuracy increased 2.3 times more than when using the heating load reduction factor of 0.75 applied uniformly in previous studies. Thus, the calculation method of seasonal heating load for greenhouses considering hours of sunshine developed in this study could be utilized for energy estimation, management planning, and economic evaluation in greenhouse design.

• 보건교육건강증진학회지
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• 제24권2호
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• pp.77-91
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• 2007

Purpose: The purpose of this study was to investigate the relationship among health behavior, obesity and QOL, and to identify factors affecting QOL of University Students in rural area, to provide the basic data for health promoting program in order to improve the QOL. Methods: The subjects of this study were 991 university students. The collected data was analyzed using descriptive statistics, t-test, ANOVA, Scheffe's test, Pearson correlation coefficient and Stepwise multiple regression with SAS. Results: In the degree of the obesity were 13.4% of the underweight group, 48.9% of the normal weight group, and 37.6% of the overweight group. The average item score for the QOL was 3.19; the highest score on the subscale was physical domains(M=3.25) with the lowest environmental domains. In the degree of health behavior performance were 15.3% of regular health check, 27.5% of exercise, 45.1% of no-smoking, 32.4% of no-drinking alcohol, 53.1% of sleeping 7-hour, 49.7% of weight care, 56.1% of stress management, and 44.4% of breakfast. The score of QOL was statistically significant difference according to age, occupation of father, the number of brothers, total income, level of life, perceived health status, and admission of hospital. The score of QOL correlated positively with health behavior(r=.2521, p<.0001), and the scores of health behavior correlated positively with obesity(r=.0915, p=.0039). Stepwise multiple regression analysis for QOL revealed that the most powerful predictor was level of life. Stress management, perceived health status, sleeping 7-hour, regular health check, admission of hospital, total income, and weight care explained 13.2% of the variance. Conclusions: Therefore, it is necessary to develop health behavior promotion program in order to enhance the quality of life of university students. Future studies need to be pursued to find significant influencing factors for QOL of university students.

• 한국게임학회 논문지
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• 제17권5호
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• pp.71-80
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• 2017

본 연구는 온라인 게임 플레이어의 유형에 따라 몰입 및 충성도에 어떠한 차이가 나타나는지 분석하였다. 한 주간 이용시간 2시간 이상의 게임 플레이어가 2시간미만 이용자보다 통계적으로 유의하게 몰입도가 높게 나타났으며, 한 주간 3시간 이상 게임을 하는 플레이어는 한 주간 1시간미만 플레이어에 비해 충성도가 높게 나타났다. 6달 이상 게임을 한 플레이어가 6달 미만으로 게임을 한 플레이어보다 통계적으로 몰입도가 높게 나타났으며, 6~9개월 게임을 한 플레이어가 3개월 미만 플레이어보다 충성도가 높게 나타났다. 또한 높은 레벨과 계급을 지니고 있는 게임 플레이어가 낮은 레벨의 게임 플레이어보다 몰입도와 충성도가 높은 것으로 조사되었다.

• 대한토목학회논문집
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• 제31권2D호
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• pp.209-215
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• 2011

회전교차로는 교차로 중앙에 원형 교통섬을 두고, 교차로를 통과하는 자동차가 이 원형 교통섬을 우회하도록 하는 평면교차로의 일종이다. 국내에서는 국토해양부에서 회전교차로 설계지침을 2004년 잠정발표 하였다. 이것은 우리나라의 교통여건이 검토되지 않은 외국의 사례를 검토 소개한 것이다. 또한, 최근 국가경쟁력강화를 위해 녹색성장의 일환으로 회전교차로에 대한 관심이 집중되고 있다. 그러나 현재 기존 회전교차로 잠정지침에서는 회전교차로의 용량 및 설치 여건, 그리고 계획절차 등에 관해 기술하고 있으나, 유형별 설계요소가 개략적이고 명확하지 않아 회전교차로 설계 적용에 있어 어려움이 존재하고 있다. 본 논문에서는 국내에 설치된 많은 유형중 접근로의 모든각이 90도인 4지 회전교차로와 72도, 45도, 30도로 한군데에서 교차하는 5지 회전교차로에 대해 모의실험을 실시하였다. 1차로 회전교차로에서 내접원 직경이 커질수록 평균통행 시간이 감소하며, 5지 회전교차로의 모든 교차각에서는 시간당 교통량이 2,000대까지는 90도로 교차하는 4지 회전교차로와 비슷한 효과를 얻을 수 있는 것으로 분석되었다.

• Environmental Analysis Health and Toxicology
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• 제24권2호
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• pp.107-117
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• 2009

Metal pollution of aquatic ecosystems is a problem of economic and health importance. Information regarding molecular responses to metal exposure is sorely needed in order to identify potential biomarkers. To determine the effects of heavy metals on chironomids, the full-length cDNA of alcohol dehydrogenase (ADH3) from Chironomus riparius was determined through molecular cloning and rapid amplification of cDNA ends (RACE). The expression of ADH3 was analyzed under various cadmium and copper concentrations. A comparative and phylogenetic study among different orders of insects and vertebrates was carried out through analysis of sequence databases. The complete cDNA sequence of the ADH3 gene was 1134 bp in length. The sequence of C. riparius ADH3 shows a low degree of amino acid identity (around 70%) with homologous sequences in other insects. After exposure of C. riparius to various concentrations of copper, ADH3 gene expression significantly decreased within 1 hour. The ADH3 gene expression was also suppressed in C. riparius after cadmium exposure for 24 hour. However, the effect of cadmium on ADH3 gene expression was transient in C. riparius. The results show that the suppression of ADH3 gene by copper exposure could be used as a possible biomarker in aquatic environmental monitoring and imply differential toxicity to copper and cadmium in C. riparius larvae.

• 대한한의학회지
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• 제23권2호
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• pp.78-87
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• 2002

Objectives : The aim of this study was to investigate the effects of Ginseng Radix (Panax ginseng C.A. MEY.), Zizyphi Spinosae Semen (Zizyphus spinosa HU.) and Rehmanniae Radix Preparat (Rehmannia glutinosa LIBOSCH.) on the serotonin- immunoreactivity cells in the Caudal raphe nuclei, Rostal raphe nuclei and hippocampus of the mouse brain. Methods : The mice were stressed by restraining for one hour and treated with herbal medicine by oral feeding. The mice were killed after one hour and observed by electron microscope after immunohistochemical staining. Results : In the caudal raphe nuclei of the medulla oblongata, the highest number of 5-HT immunoreactivity cells were observed at the Zizyphi Spinosae Semen-treated group, while the lowest level among the herbs treatment group was shown at the Ginseng Radix group. In the hippocampus, serotonin-immunoreactive cells were expressed significantly at the CA3 area while the lowest level of it was shown at the control group. In the midbrain, immunoreactive cells were expressed higher than other groups, while observed at the lowest level in the control group. Conclusions : The extracts of Zizyphi Spinosae Semen, Rehmanniae Radix Preparat and Ginseng Radix show a certain degree of effect on the change of serotonin immunoreactive neurons as an index of nerve disorder.

• Toxicological Research
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• 제28권3호
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• pp.201-207
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• 2012

In order to evaluate the physical and psychological health effects from automobile air pollution, 99 employees who worked near a main street were given a general health questionnaire, and the prevalence of their subjective complaints was measured. The collected data were classified according to gender, sleep time, degree of regular exercise, self-consciousness of symptoms, length of employment, work time, rest time, and smoking status. The results obtained were summarized as follows: The scores related to health complaints regarding physical and psychological items were higher in females than in males. THI scores were higher for the < 4 hour sleep time group. The health complaint scores for physical items were higher in the regular exercise group, whereas most scores for mental items were higher in the irregular exercise groups. The health complaints scores for physical and psychological items were higher in the unhealthy symptom group than in other groups. Those employees who had worked for > 4 years showed significantly higher rates of complaints regarding the eyes and skin. THI scores were higher for the < 6 hour working time group. The smoking group showed higher scores regarding health complaints related to physical items. The THI scores of the respiratory organs, mouth, anus, and digestive organs were significantly higher for the smoking group than for the non-smoking group. In summary, this study shows that the health complaint scores regarding physical and psychological symptoms tended to be higher among the unhealthy group, the less sleep time group, the less work time group, smokers, and females. These results can be used to improve the psychosomatic health status and working environments of employees who work near a main street.

• 치과방사선
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• 제20권1호
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• pp.125-133
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• 1990

It is known that radiation therapy is a kind of treatment choices of the maxillofacial tumors. This study is designed to investigate the effects of irradiation on rat's tongue tissues as functional tissues which relate to taste, mastication, and pronunciation. 88 rats (Sprague Dawley branch, male) were divided into control group of 4 and experimental group of 84. Experimental group was singly exposed to Co-60 irradiation with 8, 13, 18 Gy in the head and neck region. Animals were sacrificed on 1 hour, 3 hours, 6 hours, 1day, 3 days, 7 days, and 28 days after the irradiation. The specimens were observed by histopathological examination employing H-E stain and Van-Gieson stain. The results were follows; 1. The tongue tissue were severely swollen on the 1 hour after irradiation, but gradually decreased in course of time. 2. The basal cells of epithelium of tongue proliferated at initial stage of irradiation, but gradually decreased. The Keratin layer were gradually increased. 3. The muscles within the tongue were severely degenerated at initial stage of irradiation, but gradually recovered almost normally. 4. The tissue changes after irradiation were gradually increased by the degree of irradiation.