• The Journal of Korean Association of Computer Education
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• v.14 no.5
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• pp.1-8
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• 2011

The purpose of this study is to explore vocational high school students' understanding levels and misconceptions regarding the time-efficiency of algorithms. In this study, a questionnaire with nine questions was developed. The questionnaire is base on three misconceptions about the time-efficiency of algorithms that are examined through prior studies. The questionnaire was applied to 51 students who completed a programming course. The result shows that the students didn't sufficiently understand the concept of time-efficiency of algorithms and several common misconceptions appeared repeatedly. Finally, teaching strategies using simulation and assesment framework for algorithm's time-efficiency were presented and some recommendations were suggested for refining the curriculum relating computer programming and algorithms.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.22 no.1
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• pp.16-19
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• 1977

Feeding test was conducted to determine the values of opaque-2 corn selected from opaque-2 conversion program at the Crop Experiment Station, Suwon. At the end of 24 days of experiment, the average gain of body weight of white rats fed on opaque-2 corn was 40.2 grams, that of the rats on normal corn, 31.4 grams, 1.3 fold difference. The growth rate of rats expressed by regression coefficients indicated that the effects of opaque-2 corn was greater than that of normal corn.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.30 no.6B
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• pp.525-532
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• 2010

Kriging is widely applied to dealing with the spatial distribution of rainfall, however its prediction results are different according to the selection of variogram type. This study investigated adequate variogram for daily rainfall. The comparative results show that kriging prediction with covariates is better than that without covariates. The Mat$\acute{e}$rn correlation function, which is the most general type variogram, is recommended if adequate variogram is difficult to determine.

• Journal of The Korean Association For Science Education
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• v.34 no.5
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• pp.449-457
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• 2014

Recent studies have shown that teachers should have be aware of and understand students' misconceptions, which is one of the major components of PCK. However, teachers often have difficulties in understanding misconceptions and in applying appropriate instructional strategies to change misconceptions. Thus, we designed a method course for pre-service teachers (PSTs) adapting the concept of "teacher as researcher". In the course, PSTs conducted research to investigate students' misconceptions in physics. Twenty-five female PSTs participated in the study. They went through the research process including creating question items, administering items to their target populations, collecting and analyzing student responses, and writing a research paper. Data source included individual interviews with the PSTs, field notes during classroom observation and PSTs' research papers. The results were as follows. First, the PSTs confirmed students' misconceptions and learning difficulties in physics. They experienced discrepancies between their conjecture and research findings. Second, PSTs developed the sophisticated understanding of students' misconceptions and appropriate teaching strategies. Third, the research experience provided the PSTs opportunities to reexamine their physics content knowledge while creating items and explaining scientific concepts. They realized that physics teachers should develop sound understanding of physics concepts for guiding students to have less misconception. Lastly, they realized the necessity of being a teacher as a researcher.

• Journal of the Korean Society of Food Science and Nutrition
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• v.33 no.7
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• pp.1139-1146
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• 2004

The purpose of this study was to investigate the possibility of Meles meles oil as an functional resource. To assess the effects of Meles meles oil in 25 non-insulin dependent diabetes mellitus (DM) persons, we examined changes of fat intake level, hematological and chemical variables, serum DM indices and lipid contents during the Meles meles oil supplementation. Polyunsaturated fatty acid and $\omega$3 fatty acid intake were significantly increased by Meles meles oil intakes. The levels of LDL-cholesterol and triglyceride were significantly decreased while HDL-cholesterol was significantly increased. Iron status improved during Meles meles oil intakes. These results show that modest dose of Meles meles oil supplementation can decrease serum triglyceride, cholesterol level without any changes in blood glucose level in NIDDM patients. These results indicated that Meles meles oil diet is effective therapeutic regimen for the control of metabolic derangements in diabetes mellitus. Also, these results imply that Meles meles oil can be used as possible food resources and functional food materials. However, large amounts of Meles meles oil should be used cautiously in NIDDM patients.

• Journal of the Korea Organic Resources Recycling Association
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• v.25 no.4
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• pp.5-13
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• 2017

With the purpose of energy recovery from sludge having calorific value as fuel we investigated the current status and characteristics of sludge in Korea in order to understand the type and amount of sludge that can recover energy. 'The Status Report on Waste Generation and Treatment in Korea' announced that 152 million tons of wastes were generated nationwide in 2015 and 9.2 % of the whole waste disposed into landfills which includes 15.1 % of the total industrial wastes. The average of upper calorific values of sewage sludge was 3,021 kcal/kg and that of wastewater sludge was 2,472 kcal/kg respectively. In order to determine the sludge as fuel, each correlations between calorific value, carbon content and combustibility ratio were evaluated. In the study, the current status and characteristics of sludge in Korea were investigated in order to understand the type and amount of sludge as fuel to recover energy. It is predicted that if the energy of sludge having a calorific value of 6 MJ/kg($${\sim_=}1,500kcal/kg$$) or more is recovered as fuel, the amount of the sludge disposed into landfills can be reduced about 40 %.

• Journal of Korean Tunnelling and Underground Space Association
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• v.21 no.3
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• pp.419-432
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• 2019

Most of deep learning model training was proceeded by supervised learning, which is to train labeling data composed by inputs and corresponding outputs. Labeling data was directly generated manually, so labeling accuracy of data is relatively high. However, it requires heavy efforts in securing data because of cost and time. Additionally, the main goal of supervised learning is to improve detection performance for 'True Positive' data but not to reduce occurrence of 'False Positive' data. In this paper, the occurrence of unpredictable 'False Positive' appears by trained modes with labeling data and 'True Positive' data in monitoring of deep learning-based CCTV accident detection system, which is under operation at a tunnel monitoring center. Those types of 'False Positive' to 'fire' or 'person' objects were frequently taking place for lights of working vehicle, reflecting sunlight at tunnel entrance, long black feature which occurs to the part of lane or car, etc. To solve this problem, a deep learning model was developed by simultaneously training the 'False Positive' data generated in the field and the labeling data. As a result, in comparison with the model that was trained only by the existing labeling data, the re-inference performance with respect to the labeling data was improved. In addition, re-inference of the 'False Positive' data shows that the number of 'False Positive' for the persons were more reduced in case of training model including many 'False Positive' data. By training of the 'False Positive' data, the capability of field application of the deep learning model was improved automatically.

• Monthly Korean Chicken
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• s.130
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• pp.92-93
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• 2006

'팜 오일'은 팜의 과육부에서 얻어진다. 또한 팜오일의 딱딱한 내과피 내의 핵(종자)에서는 팜핵유가 얻어지게 된다. 팜오일의 원산지는 자이레 등을 중심으로 한 아프리카 서부 열대지방이며, 현재는 아프리카, 말레이시아를 중심으로 한 동남아시아, 중남미 등에서 생육되고 있다. '팜 오일'의 종류에는 팜 오일, 팜 올레인, 팜 스테아린, 팜 커널 오일, 팜 커널 올레인, 팜 커널 스테아린의 여섯 가지로 나뉘는 데, 이중 '팜 올레인유'는 종려 나무과에 속한 야자나무의 열매 송이(bunches)에서 순수압착방식을 통해 위생적으로 추출된 순 식물성 천연오일이다.

• Proceedings of The Korean Society of Agricultural and Forest Meteorology Conference
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• 2001.06a
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• pp.89-92
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• 2001

오갈피속 수종은 우리나라에 10여 종 있는 것으로 보고되고 있는데(김영진, 등 1997)약용성분이 가장 뛰어난 수종은 가시오갈피(Acanthopanax senticosus (Ruper. et Max.)Harms)로 알려져 있다. 가시오갈피는 높이 2∼3 m의 낙엽활엽관목으로서 강한 햇볕이 드는 더운곳에서는 거의 발견되지 않으며 내음 및 내한성이 강하다.(중략)

• Electronics and Telecommunications Trends
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• v.6 no.3
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• pp.92-100
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• 1991

본 고에서는 통신망의 통화품질의 기준을 설정하기 위하여, 음성품질 열화요인 중 음량정격 및 측음 마스킹 정격에 대한 일련의 주관평가를 실시하여, 음량정격과 평균 오피니언 점수 및 측음 마스킹 정격과 평균 오피니언 점수와의 상관을 구하였고, 또한 음성품질에 대한 사용자 백분율을 도출하여 사용자의 오피니언을 기본으로 하는 음성품질 기준에 대하여 기술하였다.