• 대한가정학회지
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• 제42권4호
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• pp.127-142
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• 2004

The Purpose of this study was to compare the school life of Korean high school students between Public and proprietary schools, especially focused on their internal experiences and flow. Internal experiences were composed of three dimensions: emotion, cognitive efficiency, and satisfaction. How was classified into four conditions: apathy, boredom, anxiety, and flow. The study results are: 1. Korean high school students felt more flow when they were in public school than in proprietary school,. In public school, they felt relatively more bored, and on the other hand, they were relatively more anxious in proprietary school. 2. Korean high school students felt more positive emotions when they were in public school than in proprietary school. 3. Korean high school students were more involved into study when they were in public school than in proprietary school. 4. Korean high school students were more satisfied when they were in public school than in proprietary school.

• 국제학술발표논문집
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• The 5th International Conference on Construction Engineering and Project Management
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• pp.648-651
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• 2013

The information generated in large-scale and complex construction projects are transferred continuously and transformed into project products on the long span life cycle. Therefore, information flow management is related with the success of project directly. However, certain characteristics of large-scale and complex construction projects make the solving the problem more difficultly. Although several information retrieval systems support the information management system, it is not suitable to grasp information flows. Hence, we developed an information retrieval system specialized with the information flow based on a preceding research. The system consists of a relation-based database and the process information transferring relation inference application module. The system enables project managers to manage the entire project process more efficiently and each project member to work their own task being served the information flow retrieval results.

• 의료법학
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• 제10권1호
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• pp.77-116
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• 2009

Owing to the development of Biotechnology, the involvement of humans in life before birth has been increasing. This means the need for the protection of unborn life takes on new importance. The respect for life and human beings which is based on fundamental constitutional principle should still be respected under civil law. This study examines how methods of respect for life are embodied in civil liability law. In particular, it enunciates the protection of unborn life within time-flow. Lastly, it studies the instruments of the civil liability law and the extent of protection for a fetus from the process of fertilization of an ovum by a sperm, development into an embryo and implantation. Especially, it looks into when and how the subject of the right changes. Besides, it critically scrutinizes the opinions of leading case lawyers and the Constitutional Court which conclude that, in order for a fetus to become the subject of Damage law, it is required to be born alive to comply with precedent. Furthermore, it suggests an alternative interpretation theory.

• 한국생산제조학회지
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• 제24권4호
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• pp.394-399
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• 2015

Because flow uniformity affects the life cycle and performance of the catalyst, it is an important design factor for selective catalytic reduction (SCR) systems. We examined how the diffuser angle and the area ratio of the inlet of the SCR reactor to the front of the catalyst affect flow uniformity. For the numerical analysis, we used STAR-CCM+, a common CFD software program. Analysis results showed that the larger the area ratio was, the less the flow uniformity was, and that the longer the diffuser length was, the greater the flow uniformity was. When the area ratio was greater than 1:5, the flow uniformity appeared very similar at the front of the catalyst. As a result, the spread time of the exhaust gas increased and the flow velocity decreased.

• 한국수학교육학회지시리즈E:수학교육논문집
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• 제22권1호
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• pp.1-11
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• 2008

요즘 사회 현상학에선 몰입(flow)에 대한 관심이 매우 높다. 몰입이란 쉽지는 않지만 그렇다고 아주 버겁지도 않은 과제를 극복할 때 누구나 경험할 수 있는 황홀한 상태라고 한다. 누구나 몰입경험으로 인해 삶의 질을 높일 수 있다면 여러 교과분야에서도 학생들이 이를 활용할 수 있도록 돕고 안내하는 것은 미래에 더욱 능력 있는 문제해결자가 될 수 있도록 안내하는 것이 될 것이므로 매우 의미 있는 일이라 할 수 있다. 본 연구는 수학교육입장에서 몰입을 이해하고 이를 해석해보아 그 유용성을 인식하고, 또한, 앞으로의 몰입을 구체화할 수 있는 연구의 선행연구로써 활용될 수 있기를 기대한다.

• 한국농공학회지
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• 제43권4호
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• pp.113-119
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• 2001

Ammonia emissions during composting of hog manure mixed with sawdust were studied in four runs comprising a total of 22 pilot-scale reactor vessels. These four runs extended previous work and both verified and extended the previous conclusions. The pilot-scale vessels were 205 L insulated stainless steel drums that were aerated either continuously (high/low thermostatically controlled fans) or intermittently (5 min high fan 55 min off). Temperature ammonia emissions air flow rates carbon dioxide production and oxygen utilization moisture and dry matter reduction initial and final chemical compositions were measured. Ammonia emissions from the intermittently aerated vessels were only about 50% as great as those from the continuously aerated ones but this was found to be a result more related to total air flow than to aeration technique. All of the data for total result more related to total air flow were fitted with a linear regression line y=0.139x+29.835 where y is ammonia expressed as g of N and x is air flow in kg with $R^2$=0.6808. this general trend indicates that about 50% reduction in ammonia emissions can be achieved with 75% reduction in air flow. For the aeration techniques used the minimum oxygen level in te exhaust gas from the vessels was 5% and this is probably a resonable lower limit constraining air flow reduction. However within this constraint lower air flow now appears to be a technique that can reduce odorous ammonia emissions.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 추계학술대회 논문집
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• pp.692-697
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• 2004

Damage often occurs on the surface of railway wheel by wheel-rail contact fatigue. It should be removed before reaching wheel failure, because wheel failure can cause derailment with loss of life and property. The increase or decrease of the contact fatigue life by the metal removal of the contact surface were shown by many researchers, but it has not explained precisely why fatigue life increases or decreases. In this study, the effect of metal removal depth on the contact fatigue life for railway wheel has been evaluated by applying finite element analysis. It has been revealed that the residual stress and the plastic flow are the main factors determining the fatigue life. Finally, the contact fatigue life according to metal removal has been estimated.

• 한국산학기술학회논문지
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• 제18권5호
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• pp.490-496
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• 2017

본 연구의 목적은 성격5요인과 스트레스 대처방식과의 관계에서 자기효능감의 매개효과를 검증하는 것이다. 이를 위하여 설정된 연구문제는 다음과 같다. 첫째, 성격 5요인과 스트레스 대처방식, 자기효능감의 관계는 어떠한지 분석하였다. 둘째, 성격 5요인 가운데 그 자체가 대학생의 정신건강을 의미하는 변인으로, 임상적 의미가 매우 높은 신경증과 성실성을 선정하여 신경증 및 성실성과 스트레스 대처방식과의 관계에서 자기효능감이 매개역할을 하는지 알아보았다. 이러한 연구문제를 검증하기 위하여 충청지역 D대학 1학년 462명을 대상으로 성격 5요인 척도, 스트레스 대처방식 척도, 자기효능감 척도를 실시하였다. 첫째, 상관 분석 결과 신경증과 자기효능감은 부적 상관을 나타내고, 성실성은 정적 상관을 나타냈다. 그리고 성격5요인과 스트레스 대처방식을 살펴보면 성실성은 스트레스 대처방식 가운데 회피중심과 부적상관을 보였고, 신경증은 스트레스 대처방식 중 사회적지지, 문제해결중심과 부적상관을 보였다. 둘째, 위계적 회귀분석을 사용해 자기효능감의 매개효과를 분석한 결과 자기효능감은 신경증 요인과 회피중심 간에 관계에서만 부분 매개효과가 있음을 나타냈다. 이러한 결과는 대학생의 스트레스 대처를 예측하기 위해 성격5요인이 유용한 심리적 구인이라는 점과 특히 대학생의 정신건강의 예언변수인 신경증 요인과 스트레스 대처방식 가운데 회피성향을 갖고 있는 경우 정신적 스트레스를 줄이기 위해 자기효능감에 대한 교육적 중재의 필요성을 밝혔다는 점에서 의의가 있다.

• Asian Pacific Journal of Cancer Prevention
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• 제14권12호
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• pp.7137-7141
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• 2013

Several studies have shown that nemo-like kinase (NLK) plays a vital role in apoptosis of cancer cells. The present research concerned effects and mechanisms of Taxol on NLK knockdown human laryngeal cancerHep-2 cell lines in vitro. Using RNAi, methyl-thiazoltetrazolium (MTT) assays, real-time RT-PCR, Western blotting and flow cytometry analysis, growth and the cell cycle progression of NLK knockdown Hep-2 cells and expression of downstream molecules were observed. Cell growth was obviously suppressed in the Taxol treated group (P<0.001, 48 hours). Cell numbers of combined Taxol-based chemotherapy with lentivirus mediated RNAi treatment group (Lv-shNLK+Taxol goup) were significantly different from NLK-specific siRNA lentivirus infected group (Lv-shNLK group) (p<0.001). Flow cytometry analysis revealed that Lv-shNLK+Taxol caused the G0/G1-phase DNA content to decrease from 44.1 to 3.33% (p<0.001) and the S-phase DNA content to increase from 38.4 to 82.0% (p<0.001), in comparison with the Lv-shNLK+Taxol group. Immunoblot analysis showed that knockdown of NLK led to significant reduction in the levels of cyclin D1, PCNA and PARP, whereas cyclin B1 was elevated in. Cell growth was also obviously suppressed in the Hep-2 cell line, knockdown of NLK making them more sensitive to Taxol treatment. NLK is expected to become a target of new laryngeal cancer gene therapies.

• Reproductive and Developmental Biology
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• 제35권3호
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• pp.295-300
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• 2011

The objective of this study was to evaluate efficiency of methyl-beta-cyclodextrin (MBCD) in the sperm preservation of bull. For this study, the freezing of diluted semen were added with Triladyl containing 20% egg-yolk and/or 0, 1, 5, 10 and 20 mM MBCD before freezing process. Analysis of viability in frozen-thawed sperm was estimated by SYBR14/PI double stain, hypoosmotic swelling test(HOST) and acrosome damage with FITC-PNA, and mitochondria activation with Rhodamin123 by flow-cytometry. The sperm viability was significantly in 0 mM and 5 mM concentrations of MBCD than other groups (p<0.05). However, the HOST was significantly lower at 20 mM concentration of MBCD than other concentrations (p<0.05). In addition, acrosome damage and mitochondria activation rates were significantly lower at 20 mM concentration of MBCD than other groups (p<0.05). In conclusion, the viability of sperm was not significantly different among concentrations of MBCD 0, 5 and 10 mM, but MBCD 20 mM was significantly lower than other groups. In addition, as concentrations of MBCD was high, HOST, acrosome damage and mitochondria activation rates had a negative effect in bull sperm.