• Journal of Advanced Marine Engineering and Technology
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• 제7권2호
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• pp.15-21
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• 1983

Preparing for treatment and management of the emulsified fuel oil which will be generalized henceforth, this paper is an attempt to examine the viscosity-temperature characteristics of emulsified heavy fuel oil which is mixed with water and emulsifier in various mixture ratio by mechanical mixer. The experimental results are summarized as follows: 1. The viscosity-temperature characteristics of the emulsified C & B grade heavy fuel oil mixed with water of same or less weight, is changed according to log.log(v+0.6)=b-3.8log T. 2. The emulsifier has to be added to the emulsified A grade heavy fuel oil mixed with water of same or less weight, because it is instable. Especially if the emulsifier is sodium stearate, it is added more than 0.3% of the weight of oil and water. 3. In the emulsified A grade heavy fuel oil mixed with water and emulsifier, the higher the ratio of water addition becomes, the higher the viscosity is and the more the viscosity-temperature slope decreases. But the higher the ratio of emulsifier addition is, the more the viscosity-temperature slope increases. In this case, the linearity of viscosity-temperature characteristic curve is poorer than that of B and C grade heavy fuel oil. 4. In the emulsified A grade heavy fuel oil mixed with emulsifier of 0.3% or less, the emulsion type is O/W type when water addition ratio is 40%, but it is W/O type when it is 10%, 20%, 30% and 50%.

• 수산해양교육연구
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• 제28권3호
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• pp.808-817
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• 2016

This study aims at reviewing differences of awareness toward speech-language therapy according to background variables of child-care teachers, and establishing a basic data necessary for special education support programs afterwards based on child-care centers and its characteristics with the results. Researcher carried out a survey by objecting child-care teachers of Chungcheongbuk-do, Korea, and looked into existence of some differences through SPSS 20.0 for Window, independent sample t-Test, ANOVA, Scheffe post verification on background characteristics such as level of education, working career, license grade, whether or not to have objects of speech-language objects in the class. Research results are same as follows. First, significant differences in awareness of child-care teachers toward speech-language therapy appeared from license grade among characteristics like level of education, license grade, whether or not to have objects of speech-language therapy in the class. Second, significant differences were displayed from whether or not to have objects of speech-language therapy in the class among characteristics such as level of education, working career, license grade, and whether or not to have objects of speech-language therapy. When putting these results together, a conclusion could be made such like awareness of child-care teachers toward speech-language therapy and therapists is able to be different a little according to background variables of teachers.

• 한국과학교육학회지
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• 제4권2호
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• pp.64-73
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• 1984

This study aimed at identifying the characteristics of current science curriculum in several countries in terms of its format, aims and objectives, contents and guidelines and discussed about therm. The curricula were collected from 9 countries- The United States of America(5 states), Canada(4 Provinces), England, West Germany, France, Australia, Newzealand, Japan and the republic of China. Each country had her own characteristics of science curriculum, but there also common characteristics among several countries. First, the format of science curricula in eastern countries were very different from those of western countries. The western countries had the curriculum format which included characteristics and needs of science education, philosophy and background, aims and objectives, contents, characteristics of learners, teaching and learning strategy, teaching materials, guide of experiments, evaluation methods, and other concrete informations while eastern countries had the curriculum format which included only objectives, contents and guidelines. I think that the format of science curriculum in western countries is more recommendable than that of eastern countries. Second, the aims and objectives of science curricula in eastern countries focused on scientific knowledges and concepts, while those of countries emphasized scientific methods and attitudes. Third, the contents of science curricula were very similar regardless of eastern countries or western countries. In other words, all the countries in this study emphasized life science and earth science at lower grade level and physical science at upper grade level. Especially the observation and concrete learning activities were suggested at lower grade level and logical reasoning was emphasized at upper grade level. I think that the integrated (topic-centered) science curriculum is more recommendable than our current non-integrated science curriculum in lower grade levels. Finally, the guidelines of science curriculum in eastern countries did not suggest specific information about teaching contents, experimental methods, teaching-learning activities, evaluation methods, teaching and learning meterals, while those of western countries provided more specific information which teachers could utilize very effectively.

• 한국수학교육학회지시리즈A:수학교육
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• 제60권3호
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• pp.265-279
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• 2021

본 연구에서는 초등수학 교과서의 자료와 가능성 영역에 제시된 발문을 학년군별로 비교 분석하여 발문의 특성을 파악하였다. 연구 결과 학년군별로 교과서에 제시된 발문의 유형 및 기능별 출현 비율이 서로 다르게 나타났으며, 이는 학년군별 학습 내용 및 학년군의 특성과 관련이 있는 것으로 보인다. 또한 발문의 기능은 발문의 유형과 관련이 있음을 알 수 있다. 본 연구의 결과는 초등수학의 자료와 가능성 영역 지도 시 발문 사용에 대한 교수·학습상의 기초를 제공하여 발전적인 방향으로 통계교육이 이루어지는데 기여할 수 있을 것이다.

• 한국수산과학회지
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• 제52권6호
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• pp.555-561
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• 2019

We examined the quality characteristics of four kinds of Alaska pollack Theragra chalcogramma surimi (APS), five kinds of golden threadfin bream Nemipterus virgatus surimi (GTS), and two kinds of giant squid Ommastrephes bartrami surimi (GSS) used in Korea. The volatile basic nitrogen contents of APS, GTS, and GSS increased with decreasing grade to 6.8-9.8, 5.5-8.3, and 143.5-177.7 mg/100 g, respectively. The Ca²⁺-ATPase activities of APS and GTS decreased with decreasing grade to 0.63-0.83 and 0.60-0.80 pi μmole/min/mg, respectively. The Ca²⁺-ATPase activity of RA-grade GSS was 0.82-0.91 pi μmole/min/mg. The whiteness values of APS, GTS, and GSS heat-induced gels were 54.0-71.4, 53.9-71.0, and 52.2-70.3, respectively, and that of both APS and GTS decreased with decreasing grade. The gel strengths of APS and GTS heat-induced gels were 412.3-769.4 and 280.2-456.5 g·cm, respectively, and decreased with decreasing grade. The total amino acid contents of SA-grade APS, SSA-grade GTS, and RA-grade GSS were 17,328.1, 17,965.0, and 14,846.8 mg/100 g, respectively, and the major amino acids were glutamic acid, aspartic acid, arginine, leucine, lysine, proline, alanine, and phenylalanine. The primary minerals were sodium (136.6-164.9 mg/100 g), potassium (45.7-160.4 mg/100 g), phosphorus (35.0-73.5 mg/100 g), sulfur (22.8-56.4 mg/100 g), and calcium (18.0-203.4 mg/100 g).

• 한국경제지리학회지
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• 제25권1호
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• pp.87-107
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• 2022

본 연구는 B급 문화콘텐츠를 활용한 소도시 마케팅의 가능성을 파악하는 데 그 목적이 있다. 연구대상을 충주시의 B급 문화콘텐츠를 활용한 도시마케팅으로 선정하고, 온라인 홍보물에 나타난 B급 문화콘텐츠의 특징을 통해, 지역에서의 그 활용 가능성을 알아보았다. 연구방법으로는 소셜미디어에 나타난 해시태그와 댓글 등을 근거이론에 기초하여 코딩 및 분석하는 동시에, 지자체 담당자 심층 인터뷰를 통해 세부사항을 살펴보고자 하였다. 연구결과, 첫째로 충주시 홍보물은 일반적 B급 문화의 복고/말장난/탈피 등의 특징을 보여주면서도, 특히 소통/참여/공감의 향유 과정을 나타내고 있었다. 둘째, 분석 결과로 비개연성, 상호텍스트성, 확장성, 파괴성, 진정성이 호응·공감의 주요 요인으로 나타났다. 셋째로, '기-결'의 단순한 서사구조를 통해 파급력을 형성하였다. 마지막으로 충주시의 B급 문화콘텐츠 활용의 사례는 문화자산 형성을 통한 지속가능한 도시마케팅의 새로운 가능성을 보여준 것으로 분석되었다.

• 임상간호연구
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• 제16권3호
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• pp.99-109
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• 2010

Purpose: This study was aimed to examine changes of hospital nurse staffing by hospital characteristics during 2008-2010. Methods: The study sample included 44 tertiary hospitals, 226 general hospitals, and 532 non-general hospitals that were operating during 2008-2010. Grade of nursing management fee was categorized from Grade 1(highest) to 6 (lowest) in tertiary hospitals, l or Grade 7 in general hospitals and non-general hospitals based on the nurse-to-bed ratio. For data analysis, ${\chi}^2$ and GEE were conducted. Results: For three years, the number of tertiary hospitals below Grade 2 were increased from 8 to 12, the number of those above Grade 4 were decreased from 15 to 6. The number of general hospitals above Grade 6 decreased from 123 to 86. Tertiary hospitals and general hospitals had more possibilities to improve nurse staffing grade than general hospital (OR 79.69, 95% CI 50.77~125.09, OR 11.25, 95% CI 8.15~15.53, respectively). Greater likelihood of improvement in grade of nursing management fee was found in university hospital or hospitals with 300 or more beds than other types of hospitals. Conclusion: Differentiating nurse staffing system by hospital type and increasing financial incentives according to the grades are needed to improve hospital nurse staffing.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2006년도 추계 학술발표회 논문집
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• pp.905-908
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• 2006

In this study examines physical and mechanical properties the use of domestic low grade meta-kaolin in light weight porous concrete. For this purpose light weight porous concrete incorporating low grade meta-kaolin admixture, was tested for tensile strength and acoustic characteristics. Checking tensile strength of cement and low grade meta-kaolin mixture was used to determine the optimum mix proportion of the low grade meta-kaolin admixture. In this paper sound absorbing material has been investigated by using the light weight porous concrete.

• 수산해양교육연구
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• 제21권1호
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• pp.151-160
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• 2009

The purpose of this study is to investigate the effect of Special Supplementary Mathematics Class on self-efficiency and fear of mathematics in middle school. For this study, the students involved in Special Supplementary Mathematics Classes in middle school took a pre-test and an post-test. According to the results, First, the students showed increased self-efficacy in mathematics after the Special Supplementary Mathematics Class. Second, the students showed a decreased fear of mathematics after the Special Supplementary Mathematics Class. Third, there were no significant differences between boys and girls in the effect of Special Supplementary Mathematics Classes on self-efficacy and fear of mathematics. Fourth, there were significant differences between Grade 2 and Grade 3, and between Grade 1 and Grade 2 in the effect of Special Supplementary Mathematics Classes on self-efficacy in Mathematics.

• 대한화학회지
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• 제60권6호
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• pp.415-427
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• 2016

This study analyzed the attributes of the conceptions of $3^{rd}$ to $6^{th}$ grade elementary school students on three states of matter and investigated the characteristics of the classified results of various examples of matter by grades. Through discussion activities, we confirmed the stabilization of conception attributions. For this study, 113 participants from two $3^{rd}$ to $6^{th}$ grade elementary school classes were selected. The concentration analysis (C-factor) and normalized gain (G-factor) of the conceptions for the quantitative analysis of the conception changes were used. The elementary school students retained different percentages of the attributes for states of matter. The characteristic of the grades were different between the 3rd grade and other grades. Based on these results, we pointed out the problems with the present teaching methods in science textbooks and stated the advantages of the effects of the representation of mixtures.