• 물과 미래
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• 제24권4호
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• pp.41-48
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• 1991

본 연구는 2차원비선형 동수역학방정식을 이용하여 가막만의 조류의 특성을 해석하였다. 사용된 기초방정식은 Navier-Stokes의 운동 및 연속방정식이 이용되었고, 방정식을 구성하는 각항의 특성에 관해 상세하게 살펴본 후, 그것을 음적차분법을 사용하여 수치해석하였다. 수치모델은 2차원 단층모델로 구성하였으며, 수립된 수치모델을 가막만에 적용하여, 해의 안정성과 수렴성을 검토하였으며, 모델의 결과와 현지의 관측치를 비교하여 수치모델의 재현성을 검토하였다. 본 수치실험결과 다음의 것들이 증명되었다. I) 실측치와 비교해서 조류의 유향, 유속에 대해서 재현성은 양호하게 나타났으며, II) 안정해를 얻기위한 조석주기는 4주기었다. 또한, III) 조도계수는 C=(1/n)$h^{1/6}$으로 충분히 나타낼수 있었다.

• 패션비즈니스
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• 제6권4호
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• pp.113-124
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• 2002

The purpose on this study identified the purchasing conditions of Sports wear of the Chinese men residing in Beijing, Shanghai, Dalian, Tianjin, Harbin and Guangzhou, so that it helped sports wear manufacturers and retailers offer the basic data. For the study, a questionnaire used as a method of measurement, the 863 Chinese men were selected as a sample, SAS(Statistical Analysis System) program was used to analyze the data. The results from the study were as follows: 1. According to the investigation, the most preferred sports of Chinese men is soccer, as a whole. Swimming, basketball and ping-pong keep rank the next to soccer. 2. Accordingly age, area, profession and income, Chinese men maintained sports suit in order of training suit, swimming suit, soccer suit, tennis suit. It is found that holding amount of high-quality sports wears as ski, golf is on a low level. 3. It is appeared that Chinese men purchased in good order as follow brand: No-bran, Nike, Lening, Adidas. And except Nike, they purchased more Lening brand than foreign sports brand. 4. As the result of researching on the item of sports wear, it is found that they purchased various kind items in a higher rank 5 brands. 5. Sports wear's color that Chinese men purchased is blue, white, black, red. 6. The purchasing price that Chinese men favored is 200$\sim$599RMB. Thus, they expend average per head for sports suit buying, 486.0RMB. 7. Chinese men purchased very often at specialty store. And, coefficient of utilization at the usual market is on a low level. 8. In purchasing satisfaction, 80 % Chinese men were satisfied with goods(sports wear) that purchased in a higher rank 5 brands. So, average satisfaction degree showed over 3.8 as a high rate. 9. According to the result of satisfaction on Chinese men, 70% Chinese men showed satisfaction. Therefore, the average of satisfaction degree appeared 3.81 as a high rate.

• 농업생명과학연구
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• 제44권2호
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• pp.75-84
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• 2010

식품산업의 성장이 국내 농산물에 대한 원료 수요 확대로 직접적으로 이어지지 못하는 가장 큰 요인은 국산 농산물을 원료로 사용하기에는 높은 가격이나 안정적인 조달의 어려움과 같은 제약조건이 존재하기 때문이다. 식품산업과 국산 농산물 간의 연결고리가 이와 같이 약하다는 것은 사실상 국산 농산물을 식품으로 가공하여 전적으로 수요를 확대하는 데에는 한계가 존재하기 때문에 가능성 있는 품목을 발굴하는 것이 우선적인 과제라고 할 수 있다. 그간 정부에서는 농업과 식품산업 간의 연계를 강화하기 위해 다양한 정책을 실시하여왔다. 이 과정에서 지역단위의 농업조직이나 지역농업클러스터는 원료조달과 공급이라는 일차적인 연계를 넘어서 인프라 등을 공동으로 활용하는 방향으로 연계의 또 다른 방향을 모색할 수 있을 것이다. 지역농업과 식품기업의 연계에는 정부의 지역단위 농업활성화를 위한 각종 지원 정책 이외에도 국산 농산물을 원료로 사용하는 식품기업에 대한 인센티브를 부여하는 것도 효과적인 방안 중의 하나가 될 수 있을 것이다.

• 지질공학
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• 제29권3호
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• pp.329-337
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• 2019

샘물개발허가의 유효기간은 5년이며, 연장허가를 위하여 만료 6개월 전까지 샘물환경영향조사 보고서를 첨부하여 기간 연장을 신청하여야 한다. 제출된 보고서의 심사과정에서 가장 큰 관심은 샘물 취수에 따른 지하수위 강하, 원수 수질분석 및 감시정의 모니터링 결과에 집중된다. 중생대 백악기 지역과 선캠브리아기 변성암 지역에 각각 위치하는 먹는샘물 제조업체의 취수정에 대하여 수중모터펌프의 양수능력과 양수시간을 조절하는 방법으로 수위강하량과의 상관성을 조사하였다. 양수능력을 감소시키는 방법이 매시간 동일하게 양수시간과 회복시간을 조정하는 방법보다 수위강하량을 줄이는데 효과적이었다. 또한 변성암 지역에 설치한 감시정에 대하여 pH센서의 계측자료를 분석한 결과, 설치 후 경과시간에 따라 계속 증가하여 일정한 값에 수렴하는 것으로 조사되어 관리가 어려운 pH항목을 감시정에서 제외하거나 사용자 친화적인 계측방법으로 보완이 필요할 것으로 판단된다.

• 한국임상보건과학회지
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• 제6권2호
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• pp.1156-1170
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• 2018

Purpose. This study was conducted to analyze fatigue and subjective oral health status in the employees in educational institutions and provide basic data for the development of a program for the promotion of oral health. Methods. As for the subjects, this study conducted a survey with 468 educational personnel in elementary, middle, and high schools in the Daegu-Gyeongbuk area from March through June 2016 and utilized 407 copies finally. As for the items on the survey, this study conducted an investigation on their general characteristics, fatigue, and subjective oral health status(halitosis, xerostomia, temporomandibular disorder) with the self-administered method. With the data collected, this study conducted frequency analysis, t-test, ANOVA, and multiple regression analysis, using SPSS 20.0 statistical program, and the statistical significance level was .05. Results. As a result of this study, it turned out that by sex, fatigue was higher in women(4.59 points); by the place of work, those in 'elementary school' had higher fatigue(4.59 points); and by health condition and oral health status, most of them responded that they were 'not healthy'(4.81 and 4.84 points, respectively) and there was a statistically significant difference (p<.05). As for the correlation between fatigue and subjective oral health status, there were positive(+) impacts on halitosis(=.248, p<.001), xerostomia(=.097, p<.05), and temporomandibular disorder(=.148, p<.01), so it turned out that there was a correlation between fatigue and subjective oral health status. Conclusion. Based on the result of an analysis of the impacts of the fatigue level on subjective oral health status, it is judged that it would be necessary to continue to build up a program that can promote the oral health status of the educational personnel. In addition, it is necessary to conduct studies continuously for the development and application of a program for the change in lifestyle and behavior that can lower their fatigue.

• 한국수학교육학회지시리즈A:수학교육
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• 제58권3호
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• pp.403-422
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• 2019

2015 개정 중학교 1학년 수학 교과서 총 10종을 대상으로 분석틀에 근거하여 교과서 체제별로 그래프의 표현과 해석에 관한 요소를 빈도 분석하고 교차분석 하였으며, 그래프 내용에 관한 학생들의 만족도를 조사하였다. 그 결과, 전반적으로 교과서에 그래프의 표현보다 해석에 관한 문항이 더 많이 수록되어 있으며, 또 학생들은 그래프 단원에 학습 효과는 보였지만 해당 학습에 관한 감동 여부에는 중립적인 반응을 보였다.

• 한국방사선학회논문지
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• 제13권2호
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• pp.233-239
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• 2019

본 연구는 방사선 비전공 대학생들을 대상으로 방사선사용에 관한 지식 및 인식을 분석하고자 설문조사를 실시하였다. 회수된 설문을 바탕으로 빈도, 평균과 표준편차, t-test, one-way ANOVA를 사용하였다. 그 결과, 방사선의 기본 지식과 사용 분야에 관한 지식 정도는 성별과 연령에서 집단 간 큰 차이는 나타나지 않았다. 전공 계열에서는 일부 항목에서 통계적 차이가 나타났다. 또한 방사선에 대한 인식에서는 여자와 25세 미만에서 더 부정적인 것으로 나타났다(p<0.05). 하부 요인 간 상관관계 분석 결과 방사선 지식이 높을수록 사용 분야의 지식과 방사선사용 인식이 높게 나타났다. 대학생들은 앞으로 사회에 진출하여 방사선 인식을 제고 하는데 영향력이 크다는 점에서 방사선에 대한 올바른 인식이 전달된다면 방사선 산업 발전에 기여하는 긍정적 효과를 나타낼 것으로 판단된다.

• 대한통합의학회지
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• 제7권1호
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• pp.37-45
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• 2019

Purpose : The aim of this study was to investigate the differences in sociodemographic characteristics, instrumental activities of daily living (IADL), and healthcare needs among disabled persons with and without language disorder. Methods : Using raw data from the National Survey of the Disabled Person (2017), this study compared 6,320 disabled persons without language disorder and 229 disabled person with language disorder among 6,549 persons with disabilities. The dependent variables included sociodemographic characteristics, IADL, and healthcare needs. Results : People with language disorder were younger (p<.001), illiterate (p<.001), and had higher family income (p=.003) than people without language disorder. In addition, people with language disorder had a higher disability grade than people without language disorder (p<.001), and the percentages of brain injury, hearing impairment, and intellectual disability were higher among type of disability (p<.001). People with language disorder showed significantly higher dependence on all items of IADL than people without language disorder (p<.001). As the first-ranked healthcare need, people without language disorder had the highest percentage of "chronic illness management," and people with language disorder had the highest percentage of "disability management" (p<.001). Conclusion : The findings of the current investigation suggest that health care services are needed to improve IADL in people with language disorder and that the development of a disability management program for people with language disorder is required.

• Psychiatry investigation
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• 제15권11호
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• pp.1053-1063
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• 2018

Objective This study evaluated the psychometric properties of the Korean Anxiety Screening Assessment (K-ANX) developed for screening anxiety disorders. Methods Data from 613 participants were analyzed. The K-ANX was evaluated for reliability using Cronbach's alpha, item-total correlation, and test information curve, and for validity using focus group interviews, factor analysis, correlational analysis, and item characteristics based on item response theory (IRT). The diagnostic sensitivity and specificity of the K-ANX were compared with those of the Beck Anxiety Inventory (BAI) and Generalized Anxiety Disorder 7-item scale (GAD-7). Results The K-ANX showed excellent internal consistency (${\alpha}=0.97$) and item-total coefficients (0.92-0.97), and a one-factor structure was suggested. All items were highly correlated with the total scores of the BAI, GAD-7, and Penn State Worry Questionnaire. IRT analysis indicated the K-ANX was most informative as a screening tool for anxiety disorders at the range between 0.8 and 1.6 (i.e., top 21.2 to 5.5 percentiles). Higher sensitivity (0.795) and specificity (0.937) for identifying anxiety disorders were observed in the K-ANX compared to the BAI and GAD-7. Conclusion The K-ANX is a reliable and valid measure to screen anxiety disorders in a Korean sample, with greater sensitivity and specificity than current measures of anxiety symptoms.

• 한국초등과학교육학회지:초등과학교육
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• 제37권4호
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• pp.339-351
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• 2018

The purpose of this study is to examine the effect of cooperative making problems and solving problems for formative assessment at finish stage on science academic achievement and scientific attitude. This study is conducted in 51 sixth-graders of two classes. The experimental group was provided with a teaching-learning course based on cooperative making problem and solving problem at finish stage. And the control group was provided with general classes based on the contents in teacher's guidebooks. The experiment was performed with the second and third units of the sixth grade, for about two month and obtained the following results: First, students prefer to make supply-type items than multiple choices. And by the Bloom's revised taxonomy of educational objectives, students prefer to make the problem types of 'Factual Knowledge' and 'Conceptual Knowledge'. Also students prefer to make the problem types of 'Understanding' and 'Applying'. Second, cooperative problem making and solving problems at finish stage has same effect on academic achievement in comparison to teacher-driven activity. Third, the experimental group made statistically significant difference in self-efficiency, contrary to the general science classes. Especially, it turned out that a meaningful effect was discovered to a cooperativity, openness. Finally, it turned out that many students thought cooperative making problem and solving problem at finish stage gave the help approving their cooperativity and openness at the investigation of awareness.