• Journal of Bio-Environment Control
• /
• v.32 no.1
• /
• pp.72-80
• /
• 2023

Melons, a rich source of vitamins and fibers, are commonly grown in the soil. Hydroponic cultivation could improve yield and quality of melon and selection of substrate volume and the kind of substrates is important for hydroponic cultivation of melons. This study investigated the effect on melon growth according to volume of granular rockwool and substrates of coir and rockwool slab. 'Geumsegye' melon (Cucumis melo L. cv. Geumsegye) was cultivated hydroponically according to volume of granular rockwool to 1.0, 1.5, 2.0, 3.0, and 4.0 L, and was also cultivated using coir and rockwool slabs. Logistic model was applied to estimate the growth characteristics of melons such as plant height, leaf length, leaf width, and the characteristics of fruit. The growth characteristics of melons were significantly increased at 4.0 L compared to those grown of 1.0 L volume of on granular rockwool, and the results were the highest in coir and rockwool slabs. Melons grown in rockwool slabs showed the largest fruit fresh weight, fruit length, and fruit width. During hydroponic cultivation, growth characteristics of melon appropriate at the 4.0 L volume of granular rockwool, and the highest at coir and rockwool slabs. This study provides a basis for understanding the effect of root zone environment to the growth characteristics and fruit quality of non-netted melon.

• Journal of Korea Entertainment Industry Association
• /
• v.14 no.6
• /
• pp.243-250
• /
• 2020

The purpose of this study was to investigate the effects of the satisfaction of college students majoring in healthcare-related fields with their major and with their clinical practice on their career decision-making level and to investigate the mediating effect of their satisfaction with clinical practice on the relationship between their satisfaction with their major and their career decision-making level. The subjects were 180 college students who had completed clinical practice as part of their healthcare-related majors at C University in A-gun, B-do Province. Their completed questionnaires were collected between March 2 and March 5, 2020; 165 questionnaires were used for the data analysis. Questionnaires with missing or insincere responses were excluded. According to the results of this study, the students showed a mean of 3.99 points in their satisfaction with their major, 3.33 points in their career decision-making level, and 3.71 points in their satisfaction with clinical practice. Statistically significant positive correlations were found between the students' satisfaction with their major, their career decision-making level, and their satisfaction with clinical practice. In addition, their satisfaction with clinical practice produced a partial mediating effect on the relationship between their satisfaction with their major and their career decision-making level, and those with a higher level of satisfaction with their major and with their clinical practice also presented higher career decision-making levels. Therefore, the present study suggests that healthcare-related students' satisfaction with their major and with clinical practice should be enhanced to increase their career decision-making levels.

• Water for future
• /
• v.18 no.4
• /
• pp.347-359
• /
• 1985

This study aims at the development of DP-Model for the establishment of monthly optimal operation policy of single multi-puppose reservoir by which the water demand of downstream can be satisfied under the various physical constraints. Series, A. B. C. of inflow are selected out of future monthly inflow data which are simulated form the past monthly average inflow of Andong dam site. the neight possible alternatives in each inflow series are established in order that Andong dam can supply the water demand of Nagdong main stream of 30% to 100%. Nextly, the reservoir rule curves is derived for each alternative by the detailed seguential analysis of stroage, future inflow and water demand based on the reservoir continuite equation. Then, and alternative which can satisfy the objective function of system based on the rule curves in the exteream is determined as an optimal operation policy from the application of developed DP=Model.

• Journal of The Korean Association For Science Education
• /
• v.33 no.2
• /
• pp.345-358
• /
• 2013

In this study, we investigated the current status of the teacher education curriculum and the recruitment of general science teachers, and the ways to improve them as suggested by Professors from the Department of Science Education. Most science education departments have not required double majors in general science, and there are wide differences in the number of students who take the general science programs. There is not any department that requires science courses other than its own science major courses when students get only their own in-depth science major certificate. A few departments provide integrated science courses such as history of science, scientific creativity, integrated science, and so forth. Most professors revealed negative perceptions toward 'a compulsory requirement of double majors in general science' with other in-depth science majors such as physics, chemistry, biology, and earth sciences. The majority of professors also suggested providing elective courses in integrated science-related subjects. Regarding general science majored teacher employment, most professors did not agree with separate employment for the general science teacher, although they agreed with the necessity of the general science teaching certificate. They also suggested that preservice teachers need to take science courses other than their own specialized science majors for the in-depth science teaching certificate. Based on the results, we suggested ways to improve the teacher education curriculum and the recruitment of general science teachers.

• Journal of radiological science and technology
• /
• v.35 no.1
• /
• pp.25-33
• /
• 2012

Perception level and social position of radiological technologist influence satisfaction level of their job. This study aims to use foundational data to improve perception level and social position of radiological technologists. We conducted interviews and a fill-out survey with 233 students who have been majoring in health-related fields at five universities and colleges located in Busan and who finished internship programs. The study analyzed 233 answer sheets excluding 17 inadequate answer sheets using T-test, ANOVA and multiple regression analysis with SAS9.1. The mean score of perception level was $3.33{\pm}0.56$. The personal image of radiological technologist showed the best score($3.43{\pm}0.56$) whereas the social image showed the worst($3.12{\pm}0.58$). According to the classification of the subject, the answer, "radiological technologist is specialized job", showed the best score($3.99{\pm}0.79$). The answer "radiological technologist suffered from less stress and workload than others when they work usually" showed the worst score($2.88{\pm}0.98$). According to the classification of each health-related major, the mean score of students who are a major in the department of the radiological technologist was the best($3.46{\pm}0.46$) and the students who are major in department of the physical therapy was the worst($3.24{\pm}0.40$). The radiological technologist have to effort to make positive image in the hospital. It is possible to be developed their knowledge and professionalism by cooperating between school and hospital as well as advertising with mass madia.

• 대한공업교육학회지
• /
• v.38 no.1
• /
• pp.87-103
• /
• 2013

This study was designed to identify the Attitude toward Engineering and Teacher Efficacy of pre-service teachers of engineering department, evaluate the validity of the difference and inquire into correlation between the Attitude toward Engineering and Teacher Efficacy. The study results are as follows. First, the Attitude toward Engineering of pre-service teachers of engineering department turned out to be 2.94, which is below average(3.00), and a bit lower figure than that of Teacher Efficacy(M=3.34). Second, there was no significant difference between the Attitude toward Engineering and Teacher Efficacy in a gender factor. In case of a major factor and grade variables, there was significant difference between Attitude toward Engineering and teaching efficacy of Teacher Efficacy. Third, as a result of analysis on the correlation between Attitude toward Engineering and Teacher Efficacy, it turned out that there was significant difference between in sub-area a few, which leads to conclusion that the attitude toward engineering and Teacher Efficacy will be gradually improved if educational institutes training pre-service teachers of engineering department operate teacher education courses considering major characteristics and learners' levels and give successful guidance to pre-service teachers. In addition, since the gender factor didn't make any significant difference between the attitude toward engineering and Teacher Efficacy, there is no need to develop and operate separate educational programs only for female or male pre-service teachers.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2006.05a
• /
• pp.1767-1771
• /
• 2006

수자원 개발과 계획 및 최적의 관리를 위해서는 댐지점의 수자원부존량 평가가 선행되어야 하며, 이를 위해서는 장기간의 유출량(저수지 유입량) 자료계열의 획득이 필요하다. 장기유출은 저수지의 저수용량결정, 저수지관개용수의 이용, 갈수기의 이수계획수립, 하천유지용수량결정 등에 이용되며, 장기 수자원 계획을 수립하기 위해서는 장기유출량의 정확한 추정이 매우 중요한 사항이다. 특히 동절기에 보다 정확한 유출해석을 하기 위해서는 융설에 관한 사항을 고려가 필수적이다. 그러나 국내에서는 아직 융설에 관한 실험이나 수치모형에 대한 연구가 거의 없는 실정이며 모형의 매개변수 추정 및 검증을 위한 융설 자료를 측정하기에는 매우 어려운 점이 있다. 따라서 본 연구에서는 비교적 지역적 영향을 적게 받는 개념적 융설모형과 유출모형을 결합하여 안동댐 유역에 적용하였다. 융설을 고려한 경우 융설 고려전보다 3월과 4월 사이의 유출 모의 결과가 크게 개선된 것으로 나타났다. 향후 수자원 계획 수립시 겨울철의 적설과 융설을 고려한 유출분석을 적용한다면 기후변화에 따른 수자원 확보의 불확실성이 크게 줄어들 것으로 기대한다.

• Journal of Engineering Education Research
• /
• v.17 no.5
• /
• pp.41-50
• /
• 2014

The purpose of this study was to examine the organization socialization process of engineering novice for the learning and adaptation. Qualitative case study was performed with 5 participants and the collected qualitative data were analyzed using funnel-like method. The findings showed that the organization socialization process proceed in three steps-anticipatory, encounter, and metarmorphosis. Engineering Novice look at the whole organization socialization proces of organization culture and job maladjustment, and the relationship between internal and external organizations to overcome the difficulties arising from the community through the process of becoming a full participant. Socialization of engineering novice is ultimately the organization to respond to new situations and changes in the learning process takes place in the process, talking about a major resource for human resources. This enables organizations to socialize and harmonious human relationships within the organization so that it can be more important than anything else.

• Journal of Korean Ophthalmic Optics Society
• /
• v.5 no.2
• /
• pp.167-173
• /
• 2000

Four glasses of $B_2O_3-Bi_2O_3-PbO-SiO_2$ (BBPS) system were prepared by melting the appropriate amounts of reagent grade oxides of $B_2O_3$, $Bi_2O_3$, PbO, and $SiO_2$ in an open crucible. The differential thermal analysis showed crystallization temperature decreased with increasing $Bi_2O_3$ or PbO content in the sample. The structures of glasses system were studied using scanning electron microscopy and Fourier transform-Infra red (FT-IR) spectroscopy. The UV cut-off and refractive index were found to be sensitive to the $Pb^{+2}$ and $Bi^{+3}$ content in the glasses. The behavior of the IR spectra of the glasses in the BP series was consistent with a role of $Bi_2O_3$ as a network former. In the BP series of glasses, the result of IR spectrum indicated that PbO behaved as a network former.

• Journal of Educational Research in Mathematics
• /
• v.26 no.3
• /
• pp.443-465
• /
• 2016

The study aims to compare our newest mathematics curriculum with Singapore's and analyse the differences of them. Because the levels of our mathematics education have been evaluated to be difficult to our students, we try to find that the evaluation is appropriate and there are other characteristics we have to notice carefully, and provide some implications for our mathematics curriculum. We mainly compared both mathematics curriculums focussed on the national documents of mathematics curriculum, and textbooks in the level of middle school. The results are following. Firstly, Singapore has three tracks based on students' abilities and there are three kinds of textbooks on the tracks. This is a different from our teaching on students level. Secondly, the introductions of our mathematics curriculum contents are not faster than Singapore's, but they have more concrete ranges of contents than us. Thirdly, the focus of Singapore's mathematics education lies on problem solving, and we can find some good examples of contents of textbook focussed on problem solving. Some mathematical concepts are introduced simply without any process of students discoveries or investigations, and the focus lies on the problem solving using the concepts. Fourthly, Singapore's mathematics textbooks are more emphasis on the internal connections than ours.