• Korean Journal of Childcare and Education
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• v.8 no.3
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• pp.69-89
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• 2012

This study was to examine the effects of young children's temperament and teacher-child relationship on young children's problem behaviors. The subjects of this study were 231 3-, 4- and 5- year old children and their teachers. The collected data were analyzed by correlations and pathway analysis. The results were as follows: First, young children's temperament were found to affect young children's problem behaviors directly and indirectly though teacher-child relationship. 'Negative emotionality' and 'attention span/persistence' temperament were found to be important for externalizing problem behaviors, and 'activity level' temperament to be important for internalizing problem behaviors. Second, teacher-child relationship was found to affect young children's problem behaviors directly and to mediate between young children's temperament and problem behaviors. Additionally teacher-child conflict relationship was found to be the most important variable predicting young children's externalizing and internalizing problem behaviors.

• 한국신재생에너지학회:학술대회논문집
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• 2009.06a
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• pp.176-179
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• 2009

ZnO:Al 투명전도막을 유리기판위에 in-line RF-magnetron sputtering법으로 증착온도 및 증착압력에 따라 제조하고, 습식식각에 따른 박막의 표면형상 및 광학적 특성변화를 조사하였다. 초기박막은 육방정계(Hexanonal wurtzite)의 결정 구조와 (002)면의 c-축 우선배향성을 갖으며 가시광 영역에서 높은 광 투과도(T $\geq$ 80%)와 낮은 비저항($\rho\;=\;5.2{\times}10^{-4}{\Omega}{\cdot}cm$)의 특성을 나타내었다. 습식 식각 후 박막의 표면형상은 식각 전 박막의 결정성에 큰 의존성을 보이며 본 연구에서는 1 mTorr의 낮은 증착압력과 $350^{\circ}C$의 높은 증착온도에서 증착된 결정성이 우수한 막에서 높고 균일한 형태의 crater를 갖는 표면형상을 얻을 수 있었다. 균일한 crater를 형성하는 ZnO:Al 박막은 hill 형태의 표면형상을 갖는 상용 Asahi-U glass에 비하여 높은 Haze ($T_{diffused}/T_{total}$)값과 넓은 산란각을 나타내어 향상된 광 산란특성을 갖으며 이는 실리콘 박막 태양전지내로 입사된 광의 산란경로를 증가시켜 태양전지 성능을 크게 향상시킬 수 있을 것으로 기대한다.

• Proceedings of the Korean Society of Applied Pharmacology
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• 1995.04a
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• pp.130-130
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• 1995

AM, SM 및 ASA는 수용액중에서 겉보기 1차반응에 따라 분해되었으며 보존온도가 높을수록 분해가 촉진되는 온도 의존성을 나타내었다. AM의 분해경로는 pH 1.22 및 pH 7.0 이상에서는 AM$\longrightarrow$ SM $\longrightarrow$ SA의 경로로 주로 분해되었으며 pH 2.01 - 6.08의 범위에서는 AM $\longrightarrow$ASA$\longrightarrow$SA의 경로로 분해되는 양상을 보였다. 또 pH가 분해에 미치는 영향을 pH-rate profile로 나타낸 결과 AM, SM 및 ASA의 최대안정 pH는 각각 4.0, 3.0, 2.0 부근이 있고 이 조건에서의 분해 반감기는 114, 168, 113 hr로 나타났다. 전체적으로 보면 pH 2.0 이하에서는 ASA가 AM 보다 약간 안정한 편이나 pH 2.0-8.0 사이에서는 AM의 분해속도가 ASA보다 현저히 낮았다. 또 AM은 pH 7.0 이상에서, SM은 pH 6.0 이상에서, ASA는 9.0 이상에서 특수염기촉매반응에 따라 분해가 이루어지는 것을 알 수 있었다. 이온강도($\mu$)의 영향으로는 pH 7.0에서 이온강도가 0.115에서 1.0으로 증가할수록 $\mu$$^{1}$2/에 대해 AM의 분해속도정수가 직선적으로 완만하게 감소되었다. 또 완충수용액 중 AM의 가수분해 억제효과를 검토하기 위해 시클로덱스트린류를 첨가하였을 때, $\beta$-시클로덱스트린과 히드록시프로필기-$\beta$-시클로덱스트린은 AM의 분해를 각각 1.6배 및 1.1배 촉진시켜 촉매적으로 작용하였으며 디메칠-$\beta$-시클로덱스트린은 약 3.2배 분해속도를 억제시켜 안정화제로 작용하였다.Zn^{2+}$, soybean trypsin inhibtor에 의해 25～50% 정도, serine proteinase inhibitor인 phenylmethylsulfonyl floride에 의해 80%정도 활성이 억제되는 특성이 있음을 규명하였다.면역환성 (immunoreactivity)이 나타났고 pyramidal cell layer (PCL)와 glia에 SOD-1이 강하게 염색되었다. APT 병용 투여로 상당수의 경련이 일어나지 않은 흰쥐는 해마의 DG에 FRA가 경미하게 염색되었고, PCL에 SOD-1도 경미하게 나타났으나, 경련이 나타난 쥐에서는 KA만을 투여한 흰쥐와 구별되지 않았다. 이상의 APT의 항산화 효과는 KA로 인한 뇌세포 변성 개선에 중요한 인자로 작용할 것으로 사료되나, 보다 명확한 APT의 기전을 검색하고 직접 임상에 응응하기 위하여는 보다 다양한 실험 조건이 보완되어야 찰 것으로 생각된다. 항우울약들의 항혈소판작용은 PKC-기질인 41-43 kD와 20 kD의 인산화를 억제함에 기인되는 것으로 사료된다.다. 것으로 사료된다.다.바와 같이 MCl에서 작은 Dv 값을 갖는데, 이것은 CdCl$_{4}$$^{2-}$ 착이온을 형성하거나 ZnCl$_{4}$$^{2-}$ , ZnCl$_{3}$$^{-}$같은 이온과 MgCl$^{+}$, MgCl$_{2}$같은 이온종을 형성하기 때문인것 같다. 한편 어떠한 용리액에서던지 NH$_{4}$$^{+}$의 경우 Dv값이 제일 작았다. 바. 본 연구의 목적중의 하나인 인체유해 중금속이온인 Hg(II), Cd(II)등이 NaCl같은 염화물이 함유된 시료용액에 공해이온으로 존재할 경우 흡착에 의한 제거가 가능하다. 한편 이같

• Journal of Korea Entertainment Industry Association
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• v.14 no.6
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• pp.1-11
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• 2020

With the activation of OTT and VOD services, the viewing behavior is rapidly changing, but the programming regulation has not escaped the ratio regulation in the same way as in the past. Therefore, this paper aims to examine the policy validity of the current organization ratio regulation and to suggest improvement directions based on this. To this end, the policy objectives and background at the time of the introduction of the domestic organization ratio regulation were considered and compared with the current status of the broadcasting market. As a result, this study found that it is difficult to apply the logical framework of asymmetric regulation at the time of the formation ratio regulation into the current status of broadcasting market, the existing framework was established and hold in the mutual relationship of various stake holders formed based on the asymmetric regulation. It was pointed out that the typical pattern of path dependency repeating only fine adjustment of ratio was shown. Based on this, this study suggests that it needs to be divided into the regulation by the public interest and the regulation by the industrial purpose according to the purpose of regulation, and it is necessary to be limited to the direct regulation corresponding to the public interest of the viewer. Also this study proposes that it is necessary to separate the regulation from promotion policies as well as to resolute asymmetric regulation in broadcasting policies.

• Journal of Life Science
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• v.24 no.10
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• pp.1055-1062
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• 2014

We investigated the expression of cucumber genes involved in lipid mobilization and metabolism during cotyledon development to compare gene activity and to study the direction of carbon (acetyl unit) transport between glyoxysomes and mitochondria. The core metabolic pathway involving 10 genes was examined in four intracellular compartments: glyoxysomes (peroxisomes), mitochondria, chloroplasts, and cytosol. Additionally, we tested the early germination response of dark-grown seedlings and the immediate light response for a further 3 days. According to the reverse transcription polymerase chain reaction (RT-PCR), 3-L-ketoacyl-CoA thiolase 2 (Thio2), isocitrate lyase (ICL), and malate synthase (MS), the genes involved in storage lipid mobilization showed a similar and consistent pattern of gene expression in seedling development. Furthermore, coordinate expression of the A BOUT DE SOUFFLE (BOU) gene with ICL and MS during seedling emergence pointed to a possible secondary route of acetyl unit (acetyl-CoA) transport between peroxisomes and mitochondria in cucumber. The expression of the BOU gene was light dependent, as shown by BOU activity in Arabidopsis, suggesting that the dark condition also results in weak membrane biogenesis. In addition, several genes were active throughout the development of the green cotyledon, even during senescence. In conclusion, this study summarizes oil-seed germination and gene expression during cucumber cotyledon development and proposes an additional route for acetyl unit transport.

• Tunnel and Underground Space
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• v.27 no.1
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• pp.39-49
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• 2017

The factor of safety (FOS) is commonly used as an index to quantitatively state the degree of safety of various rock structures. Therefore it is important to understand the definition and characteristics of the adopted FOS because the calculated FOS may be different according to the definition of FOS even if it is estimated under the same stress condition. In this study, four local factors of safety based on maximum shear stress, maximum shear strength, stress invariants, and maximum principal stress were defined using the Mohr-Coulomb and Hoek-Brown failure criteria. Then, the variation characteristics of each FOS along five stress paths were investigated. It is shown that the local FOS based on the shear strength, which is widely used in the stability analysis of rock structures, results in a higher FOS value than those based on the maximum principal stress and the stress invariants. This result implies that the local FOS based on the maximum shear stress or the stress invariants is more necessary than the local FOS based on the shear strength when the conservative rock mechanics design is required. In addition, it is shown that the maximum principal stresses at failure may reveal a large difference depending on the stress path.

• The KIPS Transactions:PartD
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• v.12D no.2 s.98
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• pp.259-266
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• 2005

Recently data centric routing or application dependent routing protocols are emerged in mobile ad hoc networks. In this paper, we propose a routing method for query processing in MANET(Mobile Ad hoc NETwork) environment, called road-based query routing, with consideration on real time traffic information of large number of vehicles. In particular, we focus on the method that process arrival time dependent shortest path query in MANET without a central server on the road networks. The main idea of our approach lies in a routing message that includes query predicates based on the road connectivity and on data gathering method in real time from vehicles on the road by ad-hoc network. We unify route discovery phase and data delivery(query processing) phase in our mechanism and reduce unnecessary flooding messages by pruning mobile nodes which are not on the same or neighboring road segments. In order to evaluate the performances of the proposed method, we established a model of road networks and mobile nodes which travel along the roads. The measurement factor is the number of nodes to whom route request is propagated according to each pruning strategy. Simulation result shows that road information is a dominant factor to reduce the number of messages.

• Sleep Medicine and Psychophysiology
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• v.15 no.2
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• pp.77-81
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• 2008

Introduction: REM sleep which shows characteristic muscle atonia and increased resistance of upper respiratory track is known to be vulnerable to sleep apnea. Previous studies reported that REM sleep-dependent (or related) obstructive sleep apnea syndrome (REM-dependent OSA) could be one of sleep disordered breathing. The present study aimed to investigate clinical findings and polysomnographic variables of REM-dependent OSA. Methods: Fifty-six patients diagnosed with mild to moderate obstructive sleep apnea by overnight polysomnography (5$53.7{\pm}16.7$ years, 42 males). REM-dependent OSA was defined as AHI-REM/AHI-NREM ratio>2. We compared clinical and polysomnographic findings between REM-dependent OSA and No REM-dependent OSA patients. Results: Among 56 patients, 37.5% (n=21, average age of $52.3{\pm}19.7$ years, 14 males) met the REM-dependent OSA criteria. There were no significant differences in age, sex and body mass index between two groups. After controlling for age, sex, body mass index and periodic leg movements index, REM-dependent OSA patients showed significantly lower AHI, lower number of oxygen desaturation events and higher stage 2 sleep proportion compared to No REM-dependent OSA patients (p=0.010, p=0.006, p=0.031, respectively). After controlling for age, sex, body mass index and periodic legs movements index, AHI-REM was positively correlated with the number of oxygen desaturation events in REM-dependent OSA group (p=0.002). Conclusion: Current results suggested that 37.5% of patients with mild to moderate severity of obstructive sleep apnea could be classified into REM-dependent OSA. REM-dependent OSA was more common in mild severity of OSA, equally prevalent in both sexes and accompanied with sleep architecture changes, i.e. increased proportion of stage 2. In addition, apneic events during REM sleep in REM-dependent OSA were related to oxygen desaturation.

• Food Science of Animal Resources
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• v.29 no.3
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• pp.349-355
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• 2009

The temperature dependence of time temperature integrator (TTI) was investigated in terms of the Arrhenius activation energy (Ea) to determine TTI requirements to accurately predict meat quality during storage. Mathematical simulation was conducted using a numerical analysis. First, using Euler's method and MS Excel VBA, the TTI color change was kinetically modeled and numerically calculated under several storage conditions. From the TTI color variable profiles calculated from the storage time-temperature profiles, $T_{eff}$, which is a constant temperature representing the whole temperature profiles, was calculated. Upon predicting Pseudomonas spp. concentrations (one of the meat qualities) from $T_{eff}$, it was found that if $Ea_{microbial\;spoilage}=Ea_{TTI}$ be true, then Pseudomonas concentrations were calculated to be constant with the same TTI color values, regardless of time-temperature profiles, whereas if $Ea_{microbial\;spoilage}{\neq}Ea_{TTI}$ then Pseudomonas concentrations varied even with the same TTI color values. This indicates that each TTI color value represents its own fixed degree of meat quality, only if $Ea_{meat\;qualities}=Ea_{TTI}$.

• Korean Journal of Psychosomatic Medicine
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• v.14 no.2
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• pp.102-107
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• 2006

Objectives : The aim of this study is to evaluate depressive symptom of methamphetamine(MA) dependent subjects and the association between depressive symptom and characteristics of methamphetamine use. Methods : Forty three MA dependent subjects and 40 healthy comparison subjects were recruited in this study. Characteristics of substance use and depressive symptom using Beck Depression Inventory (BDI) were evaluated. Results : Average BDI score of methamphetamine group is $14.1{\pm}7.7$, which is significantly higher than that of healthy comparison subjects $(7.3{\\pm}5.7)$ (t=4.04, df=65, p<0.001). Given that 38.9% of MA dependent subjects and 22.6% of healthy comparison subjects are attributed to mild to moderate depressed state and 27.8% of MA dependent subjects and 3.2% of healthy comparison subjects to moderate-severe depressed state, depressive symptom is more frequently observed in MA dependent subjects relative to healthy comparison subjects (p=0.001). On covariating as sex, age, alcohol use and smoking, prevalence of depressive symptom is still higher in MA dependent subjects than healthy comparison subjects (OR=300.7, p=0.012). BDI scores of MA dependent subjects are correlated with abstinence period (r=-0.35, n=36, p=0.042) but not with cumulative dose or duration of use (r=-0.08, n=36, p=0.677 : r=-0.08, n=36, p=0.658). Conclusion : Depressive symptom was severe and frequently observed in MA dependent subjects. This study suggested that depressive symptom of MA dependent subjects might be not associated with degree of MA use but decreased by persistent abstinence.