• 한국생활과학회지
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• 제19권2호
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• pp.285-294
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• 2010

This study examined the relationship between children's school adjustment and their emotion regulation. The subjects were 122 1st grade students selected from one elementary school in Incheon. Teachers rated each child using the Emotion Regulation Scale (Lee, 1997) and School Adjustment Scale (Chi & Jung, 2006). The data were analyzed by using descriptive statistics, t-test, correlation analysis, and stepwise regressions. The children's emotion regulation and school adjustment were differed by sex of the child. The girls were assessed to be better adapted in emotion regulation and school adjustment than the boys. The children's emotion regulation was positively related to the children's school adjustment. In addition, the children's emotion regulation predicted how well they would adjust to school life.

• Journal of Electrical Engineering and Technology
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• 제10권1호
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• pp.138-145
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• 2015

In this paper, a novel static overmodulation scheme (OVM) for space-vector PWM (SVPWM) is proposed. The proposed static OVM scheme uses the concept of adding offset voltages in linear region as well as overmodulation region to fully utilize DC-link voltage. By employing zero sequence voltage injection, the proposed scheme reduces procedures for achieving SVPWM such as complicated gating time calculation. In addition, this paper proposes a stepwise discontinuous angle movement in high modulation region in order to reduce Total Harmonic Distortion (THD). The validity of the proposed scheme is verified through theoretical analysis and experimental results.

• 한국해양바이오학회지
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• 제2권3호
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• pp.155-159
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• 2007

Ethanolysis of squid viscera oil with immobilized lipase was investigated for reducing the free fatty acid contents and enhancing the function of the oil by stepwise addition method of Shinmada[1]. Tendency of oil variation during Ethanolysis showed increased content of diglyceride, monoglyceride and fatty acid ethyl ester with reduced free fatty acid contents. The oil composition was analyzed using GC-FID and compared before and after ethanolysis. Structural analysis of the lipid was performed by HPLC-UV spectrophotometer during ethanolysis. The transformed oil was thought to has suitable properties for functional oil production.

• 수산경영론집
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• 제44권3호
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• pp.77-84
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• 2013

While some steps in laver aquaculture production can be controlled artificially to a certain extent, the culturing process is largely affected by natural factors, such as the characteristics of seawater, climatic and oceanographic conditions, etc. This study aims to find a direct relationship between climatic and oceanographic factors (water temperature, air temperature, salinity, rainfall, sunshine duration and wind speed) and laver aquaculture production in Wando region, the biggest aquaculture production area of laver, located in the southwest coast of Korea using a multiple regression analysis. Despite the small sample size of a dependent variable, the goodness of model fit appeared acceptable. In addition, the R-squared value was 0.951, which means that the variables were very explanatory. Model results indicated that duration of sunshine, temperature, and rainfall during the farming period from the end of September to the end of April would be important factors affecting significantly to the laver aquaculture production.

• 한국보건간호학회지
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• 제26권3호
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• pp.572-580
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• 2012

Purpose: This study examined factors influencing death anxiety in the middle aged. Method: This was a descriptive survey study. Data were collected from September to October, 2011, from 410 middle- aged adults. The questionnaires solicited information on death anxiety, health behavior, depression, life satisfaction, and family function. Analysis of data was performed using descriptive statistics, Pearson's correlation, and stepwise multiple regression. Results: Average scores were 2.53 for death anxiety, 3.02 for health behavior, 4.44 for depression, 10.13 for life satisfaction, and 3.77 for family function. Statistically significant negative correlations were observed between health behavior and death anxiety, life satisfaction and death anxiety, and family function and death anxiety. However, from the statistical point of view the correlation between depression and death anxiety was a significantly positive. In addition, statistically significant positive correlations were observed between depression and death anxiety. Depression, life satisfaction, and family function were significant predictors of death anxiety. Conclusion: Multilateral nursing intervention is needed for maintenance of the health of middle aged adults.

• 한국환경과학회지
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• 제3권4호
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• pp.439-443
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• 1994

In aqueous acid solution ${[Cr(CN)_6]}^{3-}$ aquates via a series of stepwise stereospecific reactions to give ${[Cr{(H_2O)}_6]}^{3+}$as the final product.Some of the intermediate cyanoaquo complexes in the sequence have been isolated.These complexes aquate by both acid independent and acid denpendent pathways, the latter involving protonation of the cyano ligands followed by aquation of the singly protonated species. The kinetic data for the aquation of {[CrCN{(H_2O)}_5]}^{2+}$ are consistent with the transition state structure ${[{(H_2O)}_4Cr(CN)-OH-Cr{(H_2O)}_5]}^{3+}$. Addition of $Cr^{2+}$ to solutions of cyanocobalt(III) complexes produces the metastable intermediate${[CrNC{(H_2O)}_5]}^{2+}$ This isomerizes to in a $Cr^{2+}$-catalyzed reaction which occurs by a ligand-bridged electron-change mechnism. From acid catalysis on these aquation reactions, it product HCN. Especially, $HSO_3$-ions do the role of catalyst in the formation of HCN from $CrCN^{3-}$

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2004년도 춘계 학술발표회 제16권1호
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• pp.40-43
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• 2004

A new design method for prestressed concrete girder is proposed in this study, which steps for manufacturing are; (1) the bottom part of concrete girder is placed and pretensioned by the first post-tensioning performed on the tendons located in the bottom part of concrete girder, and (2) the next step which consists of concrete placing and post-tensioning operation is followed by the previous step if required. This indicates that sufficient compressive stress can be effectively introduced at the bottom face in stepwise manner, when compared to conventional PSC girder. Two specimens are prepared and tested to investigate the short-term behavior of the PSC girders manufactured by the proposed method. Section Analysis results exhibit good agreements with the test results in terms of strain distribution across the girder section. In addition, flexural strength obtained from the tests is found to be similar to the expected based on Code(Korea). These demonstrate that the method proposed in this study is applicable to the design of PSC girders.

• 한국응용과학기술학회지
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• 제20권3호
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• pp.251-258
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• 2003

Biodiesel as methyl esters derived from vegetable oils has considerable advantages in terms of environmental protetion. In the present work, methyl esters were produced from soybean oil by lipase-catalyzed transesterification. To reduce inactivation of commercial immobilized lipases emulsified two-step process was developed using the stepwise addition of methanol with 4:1 molar ratio at 4h intervals. Also with immobilized lipase from Candida antarctica(Novozym 435) high conversion of 98.5 percent was possible at $45^{\circ}C$ of reaction temperature with 4:1 of methanol-to-oil molar ratio and 1%(v/v) methyl glucoside oleic polyester as an emulsifier in the presence of cosolvent.

• Genomics & Informatics
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• 제1권1호
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• pp.7-19
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• 2003

The latest measure of the relative evolutionary age of protein structure families was applied (based on taxonomic diversity) using the protein structural interactome map (PSIMAP). It confirms that, in general, protein domains, which are hubs in this interaction network, are older than protein domains with fewer interaction partners. We apply a hypothesis of 'biological network evolution' to explain the positive correlation between interaction and age. It agrees to the previous suggestions that proteins have acquired an increasing number of interaction partners over time via the stepwise addition of new interactions. This hypothesis is shown to be consistent with the scale-free interaction network topologies proposed by other groups. Closely co-evolved structural interaction and the dynamics of network evolution are used to explain the highly conserved core of protein interaction pathways, which exist across all divisions of life.

• 한국간호교육학회지
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• 제14권1호
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• pp.73-79
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• 2008

Purpose: This study was conducted to investigate the level of nursing professionalism and the factors affecting it, In addition, it can serve as a fundamental resource for development of appropriate strategies for nursing professionalism. Method: This study was performed on 370 nurses working at two university hospitals located in Seoul. Data was analyzed by Pearson correlation analysis, and stepwise multiple regression using SPSS Win 14.0. Result: The estimated regression model of nursing professionalism was statistically significant (F=199.89, p=.000). Major factors influencing nursing professionalism were observed as ability of job performance (${\beta}=.811$), job satisfaction (${\beta}=.140$), organizational commitment (${\beta}=.086$), and turnover intention (${\beta}=.084$). These four factors explained 67.9% of nursing professionalism. Conclusion: Based on the results of the study, further research is needed to investigate other factors affecting nursing professionalism.