• Proceedings of the Korea Society of Environmental Biology Conference
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• 2005.12a
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• pp.85-85
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• 2005

• Journal of the Korean Ceramic Society
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• v.32 no.11
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• pp.1241-1245
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• 1995

Ultrathin oxynitride (SiOxNy) films, 8nm thick, were formed on Si(100) in furnace using O2 and N2O as reactant gas. Compared with conventional furnace grown oxide, oxynitride dielectrics show better characteristics of Qbd and I-V, and less flat-band voltage shift. Excellent diffusion barrier property to dopant (BF2) is also confirmed.

• Journal of applied mathematics & informatics
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• v.23 no.1_2
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• pp.581-588
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• 2007

We reconsider the classical orthogonal polynomials which are solutions to a second order differential equation of the form $$l_2(x)y'(x)+l_1(x)y'(x)={\lambda}_ny(x)$$. We investigate two characterization theorems of F. Marcellan et all and K.H.Kwon et al. which gave necessary and sufficient conditions on $l_1(x)\;and\;l_2(x)$ for the above differential equation to have orthogonal polynomial solutions. The purpose of this paper is to give a proof that each result in their papers respectively is equivalent.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2000.11a
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• pp.23-24
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• 2000

• Korean Journal of Organic Agriculture
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• v.5 no.1
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• pp.125-135
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• 1996

A study was made to investigate the possibility of treating various organic waste of cattle manure, swine manure, goat manure, apple pomace, chinese medicine residue and coffee less by feeding these to earthworms and then by studying the growth and reproductive efficiency of earthworms, and the chemical composition of worm cast and its production. The results are summarized as follows. 1. When the feed for earthworms were in good condition which were cattle manure, swine manure and apple pomace, the reproductive efficiency of earthworms was improved however in worse condition the feed of which were goat manure and chinese medicine residue, the increasing rate(IR) became faster. 2. Despite the high content of organic matter(OM) in coffee lees, the earthworms fed coffee lees showed significantly lower reproductive efficiency and increasing rate(IR) than those fed other organic waste due mainly to its lower pH and lower total nitrogen(TN) content. Therefore, when coffee lees is considered to be fed to earthworms, it is believed necessary to be mixed with addiveves or other organic waste in order to improve the feed condition. 3. pH in swine manure, goat manure, apple pomace, chinese medicine residue and coffee lees became neutralized by being fed by earthworms. 4. Available P2O5 and exchangeable cation(EC) of earthworm cast were a little increased compared to those of feed. The contents of Mn, Fe and Cu in earthworm cast were a little decreased to compared to those of feed. 5. The contents of Mn, Fe and Cu in earthworm cast were a little a decreased to compared to those of feed. 6. Mean fresh weight of earthworm at final time(FW2) was negatively correlated with number of young worms(NY)(P<0.01), but positively with increasing rate(IR) (P<0.001) and C/N ratio(P<0.05) respectively. Number of cocoons (NC) and fresh weight of cocoons(WC) were positively(P<0.01) correlated with fresh weight of young worms (WY) and digested matter(DI) but negatively(P<0.001) correlated with residual matter(WY) and digested matter(DI) but negatively(P<0.001) correlated with residual matter(RW). Number of young worms(NY) and fresh weigh of young worms(WY) were negatively(P<0.001) correlated with increasing rate(IR), however increasing rate(IR) of earthworm was positively(P<0.05) correlatedd with C/N ratio.

• Journal of Fashion Business
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• v.8 no.4
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• pp.117-130
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• 2004

The purposes of this study were to find out highly market sharing young casual brands, to compare their trends of concept and competition, and to propose orientation of brand concept repositioning and marketing strategies on Department stores. Reference searching method and field searching method were used for this study. The results were as follows: 1. The brands which covered more than 50% market share included <96NY> . 2. Price range of these brands was from 130,000 to 220,000 won. The brands of upper-moderate price zone included <96NY> and they were very competitive each other. The brands of moderate price zone included and they were also very competitive between them. However, the brands of lower-moderate price zone had lower competition. This price zone might be a good point to launch new brands. 3. The main target-age of young casual zone was from 17 to 30 years. The most of brands focused on 21-25 years old, which were higher age targeted before. 4. The main concepts of these brands were 'luxury, girlish, sexy' and 'Sportism, lifestyle' were sub-concepts.

• Korean Journal of Child Studies
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• v.37 no.4
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• pp.145-158
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• 2016

Objective: This study investigated the moderating effect of emotional dysregulation on the relationship between teacher efficacy and job stress among teachers in the Early Childhood Education and Care (ECEC). Methods: The participants included 586 ECEC teachers from 99 centers in Seoul, Gyeonggi-do, Daejeon, Chungcheong-do, Jeolla-do, and Gyeongsang-do. The data were analyzed through frequencies, percentages, and Pearson's correlations using SPSS 21.0 (IBM Co., Armonk, NY). To analyze the moderating effect, Ping's (1996) two-step approach was used via AMOS 20.0 (IBM Co., Armonk, NY). Results: The main findings are as follows. First, the mean scores of ECEC teacher efficacy and job stress showed above the average, and the mean score of emotional dysregulation was the nearly average. Second, fit statistics indicated that the proposed model, as revised, provided an acceptable fit to the sample data. This proposed model showed that the emotional dysregulation of teachers in ECEC had a moderating effect on the relationship between teacher efficacy and job stress. Conclusion: These findings imply that the ECEC teachers showed the higher level of self-trust and self-confidence than average regarding their own work, and suffered from the work overload. Also, the positive and supportive working environment would help the ECEC teachers to reduce their emotional dysregulation. In addition, there was a moderating effect of the ECEC teachers' emotional dysregulation on the relationship between teacher efficacy and job stress. These findings imply that the workshop or counselling programs need to be provided to teachers in order to help control their emotion dysregulation and reduce their job stress.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.1
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• pp.814-821
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• 2015

The purpose of this study is to estimate crack reduction properties of covering concrete with fibers in basement. Air contents, slump, compressive strength, tensile strength and plastic shrinkage has been tested to conduct the optimum addition ratio and type of fiber. The results is a following. For the properties of air contents, all of the specimens added fibers shown the higher than plain concrete. For the flowability, slump decreased about 40-80% when all of the specimens added fibers. For the strength properties, the specimens added nylon fiber shown higher compressive and tensile strength about 5-15% comparing with other concrete. For the plastic shrinkage, cracking decreased when the fiber added comparing with plain concrete. Especially, when nylon fiber added in the concrete, the plastic shrinkage did not occurred. For the overall consideration, when the addition ratio of nylon fiber is 0.6%, the press concrete is identified as showed optimum properties.

• Korean Journal of Food Science and Technology
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• v.22 no.2
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• pp.134-139
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• 1990

A strain of Nuruk yeast No. IS (NY-15) which produced high activity of ${\beta}-galactosidase$ was isolated from Nuruk, and the crude enzyme was prepared by whey permeate culture of the microorganism. The crude enzyme was purified 40-fold with a 7.7% yield by acetone and ammonium sulfate fractionational precipitation, and chromatography on DEAE-cellulose, DEAE-Sephadex A-50 and Agarose-PAPT. Purified ${\beta}-galactosidase$ from Nuruk yeast showed two types of subunit patterns; a slow moving band and a fast moving deeply stained band, both anode·migrating at pH 7.5. The molecular weight of the former was estimated to be about 130,000 and that of the latter was 96,000 by SDS-polyacrylamide gel electrophoresis. The optimum pH of the enzyme activity was 7.5 and maximum activity appeared at $40^{\circ}C$.

• Journal of the Korean Ceramic Society
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• v.31 no.6
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• pp.637-642
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• 1994

Using SHS(Self-propagating High-temperature Synthesis) method, the optimum synthetic condition of titanium carbonitride was established by controlling the parameters such as relative density of mixture (Ti+C), nitrogen pressure, additive amounts of titanium hydride(TiH1.924) and protecting heat loss. Under 1 atm nitrogen pressure, nitridation ratio with changing relative density of the sample compacts has a maximum (87.2%) at about 55%, and in the case of enveloping the pellet with a quartz tube, the highest nitridation ratio of 90% was obtained at about 68%. At relative density of 55%, nitridation ratio with the nitrogen pressure has a miximum (87.3%) at 7 atm. As the amounts of additive titanium hydride increased, nitridation ratio decreased at below 7 atm nitrogen pressure and, increased at above this pressure until percent of addition percent reached 15 wt% and decreased abruptly upon futher increases in titanium hydride. In the synthesis of TiCxNy by combustion reaction, heat transfer from combustion zone to preheating zone and nitrogen gas penetration into the compact were found to be important factors affecting the TiCxNy formation. It was difficult to obtain high nitridation ratio when the conbustion temperature was either too high or too low, and it seems that the retention of high temperature after a combustion wave sweeped through the reactant mixture pellet is critical to obtain a satisfactory nitridation ratio.