• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.12
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• pp.157-166
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• 2019

This study investigates the influence of emotional intelligence and professional self-concept on retention intention in nurses. The participants were 170 nurses from three hospitals in B city. Data were collected with structured questionnaires, from May 7 to May 30, 2019, and analyzed by applying descriptive statistics, t-test, ANOVA, Pearson's correlation coefficients, and stepwise multiple regression, using the SPSS/WIN 24.0 program. Our results reveal the level of emotional intelligence to be 4.82(7), professional self-concept 2.61(4), and retention intention 5.47(8). We observed that the retention intention positively correlates with emotional intelligence and professional self-concept. The factors influencing retention intention were professional self-concept (β=.456, p<.001), age (β=-.228, p<.001) and holidays (β=.197, p=.002). This regression model determines the intention retention to be 35.9%. We propose that it is necessary to develop and make available programs embracing factors that prevent and reduce retention intention in nurses.

• Journal of the Korean Society of Clothing and Textiles
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• v.34 no.5
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• pp.726-739
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• 2010

This study investigates and compares the changes in ethnic fashion presented over a 30-year period to understand the diversity of ethnic trends according to historical trends. Data were collected from 59 volumes of "Vogue" magazine for January and July in each year from 1980 to 2009. The data used for content analysis consists of 407 words and these were condensed into three periods according to the decade (1980-1989, 1990-1999, and 2000-2009). The selected words were classified into five sub-themes according to previous research definitions such as Asian look, European look, American look, African look, and Oceanic look. The results are as follows. First, ethnic fashion was highly presented in the 1990s and 1980s, and decreased in the 2000s; of note is that the Asian look appeared more in the 1990s. Second, ethnic fashion showed a higher frequency of F/W seasons in the 1980s and S/S seasons in the 2000s, while both seasons had a higher frequency in the 1990s. The sub-themes of coexistence were presented 26seasons out of 59 seasons. The coexistence of the Asian-European look was evident in the 1980s and 2000s, while the sub-themes coexistence was more diverse in the 1990s. Third, the words selected from sub-themes of ethnic fashion demonstrated the differences by decade. In particular, various fabrics and patterns appeared in the 1990s.

• Journal of Korean Society for Quality Management
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• v.44 no.4
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• pp.799-811
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• 2016

Purpose: The conjoint analyst in marketing are interested in detecting whether there exist synergy or antagonistic effects between two attributes. In the cases where attributes have two or three levels, we research on the design of survey questionnaire to estimate all the main effect and as many two factor interaction effects as possible. Methods: We consider the balanced incomplete block (BIB) mixed level factorial design $2^f{\times}3^g$ or fractional factorial design. To reduce the number of questions in a questionnaire, we propose the balanced incomplete block mixed level design with minimum aberration which is generated by implementing proc factex in SAS. Also, we propose using two or three level BIB factorial design instead of mixed level designs by transforming three level attributes into two attributes of two levels and two level attribute into three level attribute by using dummy level technique. Results: We propose three methods for designing survey questionnaire where the block and design generators are found with practical number of questions in a questionnaire. By analyzing all the respondents survey data generated by the simulation study, we find the proper model and do the concepts optimization. Conclusion: The proposed methods of designing survey questionnaires seem to perform well in the sense that the proper model, and then the optimal concept is found in a case study where all the respondents survey data are generated by the simulation study.

• Journal of environmental and Sanitary engineering
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• v.23 no.4
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• pp.37-44
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• 2008

In this study we developed the analytical methods for the determination of three neurotoxin; anatoxin-a, saxitoxin and neosaxitoxin using HPLC/FLD system and this analytical methods were applied to real sample; algae culture and algae extracts. For the HPLC/FLD analysis of anatoxin-a samples were concentrated on WCX(Weak Cation Exchanger) SPE and then anatoxin-a in concentrate was derivatized with NBD-F solution. Supernatant was injected on HPLC system. For the HPLC/FLD analysis of saxitoxin and neosaxitoxin samples were separated on the column and then derivatizied by post column reactor for fluorescen detection. For post column reaction of saxitoxin we feed two kinds of reaction solution; Oxidizing Reagent of which composition was periodic acid(7mM) in 50mM potassium phosphate buffer, pH 9 and acidifying reagent of which Composition was 0.5M acetic acid. The LOD value for anatoxin-a, saxitoxin and neosaxitoxin in HPLC/FLD method was 24.3 ng. $35{\mu}g/L$, $27{\mu}g/L$ respectively. We determined the anatoxin-a content of lyophilized anabaena flos-aquae and $20{\mu}g/g$ d.w. of anatoxin-a was detected. We analyzed saxitoxin and neosaxitoxin in algae culture media and extracts of lypopyllized algal cell cultured and that of Deachung reservior. Saxitoxin and neosaxitoxin in real sample were below the limit of detection. Although there are various water treatment processes for removing neurotoxins were suggested no process give simultaneous and complete removal of neurotoxins. It was cocluded that nanofiltration which reject material by size can be a process for removal of neurotoxins.

• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.9 no.2
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• pp.158-166
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• 1999

The purpose of this study was to investigate the correlation between airborne total dust and man-made mineral fibers (MMMF), and to estimate total dust concentration to maintain below the American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV$^{(R)}$) for the MMMF. The regression coefficients between airborne total dust concentrations and fiber concentrations determined in the industries producing glass fibers, rock wool. refractory ceramic and continuous filament glass fibers products were 0.41, 0.42, 0.20 and 0.19, respectively. The size characteristics of fibers as well as the amounts of contaminated non-fibrous dusts could affect the correlation intensities. When total dust and fiber exposure data were compared with the occupational exposure limits, there was a large gap between two evaluation results. The regression coefficient between total dust and fiber data was increased ($r^2=0.88$) in the process of insulation installation generating in the higher levels of glass or rock wool fibers. In this case, an estimated total dust concentration of glass wool or rock wool fibers complying with the ACGIH TLV (1 f/cc) was $1.7mg/m^3$. In conclusion, the total dust and fibers concentrations was highly correlated at the higher exposure levels so that total dust-monitoring data could be used to control simply and economically and to estimate worker's exposure to fibers.

• Journal of the Korean Society of Physical Medicine
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• v.5 no.1
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• pp.15-24
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• 2010

Purpose : The purpose of this study was to investigate the effect of loading position on plantar center of pressure(COP) displacement when carrying a schoolbag during walking. Methods : Forty-four normal subjects were randomly assigned to five groups according to the method of carrying a schoolbag. The carrying a schoolbag methods were classified into five conditions: no bag (condition 1), a backpack (condition 2), a shoulder bag (condition 3), a cross bag (condition 4), a one-hand bag (condition 5). COP displacement such as anteroposterior distance and mediolateral distance of COP were measured with F-scan system. The repeated one-way analysis of variance (ANOVA) and independent t-test were used to confirm the statistical significance. Results : In the comparison of parameters of COP displacement between conditions, anteroposterior distance and mediolateral distance in the left foot and mediolateral distance in the right foot were not significantly different(p>.05), but anteroposterior diatance in the right foot was significantly different(p>.05). Between left and right foot, at condition 1 and 5 the mediolateral distance of COP was significantly different(p<.05) but anteroposterior distance at condition 1 and 5, anteroposterior distance and mediolateral distance of COP at condition 2, 3 and 4 were not significantly different(p>.05). Conclusion : These findings showed that the various loading position by five types of carrying a schoolbag didn't have influence significantly on COP displacement on during walking because of mechanism of postural adaption.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.18 no.4
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• pp.15-27
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• 2015

The objectives of this study are to analyze the quantitative ecological principal components of Korean Peninsula using the multivariate spatial environmental datasets and to compare the ecological difference between South and North Korea. Ecological maps with GIS(Geographical Information System) are constructed by PCA(Principal Component Analysis) based on seventeen raster(cell based) variables at 1km resolution. Ecological differences between South and North Korea are extracted by Factor Analysis using ecosystem maps masked from Korean ones. Spatial data include SRTM(Shuttle Radar Topography Mission), Temperature, Precipitation, SWC(Soil Water Content), fPAR(Fraction of Photosynthetically Active Radiation) representing for a productivity, and SR(Solar Radiation), which all cover Korean peninsula. When it performed PCA, the first three scores were assigned to red, green, and blue color. This color triplet indicates the relative mixture of the seventeen environmental conditions inside each ecological region. The first red one represents for 'physiographic conditions' worked by high elevation and solar radiation and low temperature. The second green one stands for 'seasonality' caused by seasonal variations of temperature, precipitation, and productivity. The third blue one means 'wetness condition' worked by high value such as precipitation and soil water contents. FA extraction shows that South Korea has relatively warm and humid ecosystem affected by high temperature, precipitation, and soil water contents whereas North Korea has relatively cold and dry ecosystem due to the high elevation, low temperature and precipitation. Results would be useful at environmental planning on inaccessible land of North Korea.

• Applied Chemistry for Engineering
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• v.9 no.4
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• pp.608-613
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• 1998

The purpose of this experiment was the physical properties of rubber compounds with DPCB and pure carbon black. Si-O peak in the silcia surface was observed at the range of wavenumber from 1,100 to 1,200 in the DPCB by FT-IR analysis. Cure rate of rubber compounds containing DPCB and organic silane coupling agent were (Si69) delayed compared with those containing pure carbon black. 300% modulus and interaction coefficient of DPCB with silane coupling agent were higher than those of pure carbon black and PICO weight loss amount showed constant value. It was found that $0^{\circ}C$ tan$\delta$ of rubber compounds with DPCB was larger than those of pure carbon black at 2.0% silane coupling agent based on 50 phr DPCB and $60^{\circ}C$ tan$\delta$ of rubber compounds with DPCB decreased as increasing the usage coupling agent. Consequently, it is postulated that DPCB is strong candidate material for lowering rolling resistance under constant abrasion resistance.

• Journal of Digital Convergence
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• v.14 no.2
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• pp.333-344
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• 2016

The purpose of this study was to explore the influence of nurses's clinical career and communication within organization on teamwork competency. A cross sectional descriptive survey design was used. Convenience sampling method of 141 nurses who work at a university hospital located in S city was used. The structured questionnaire was administered from July $20^{th}$, 2015, to July, $31^{th}$, 2015. The average working periods of research subjects was 8.84 years. The regression model with communication within organization and clinical career against teamwork competency was statistically significant. And this model could explain 37.7% of teamwork competency(Adj $R^2=.377$). Especially, vertical communication and clinical career, horizontal communication were identified as the influencing factors on nurses' teamwork competency.

• Journal of the Korean Data and Information Science Society
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• v.26 no.2
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• pp.455-464
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• 2015

This study aimed to identify the factors influencing health education performance of health promoting hospital nurses. The study was conducted with 231 nurses from four health promoting hospitals. Data were collected from May to June, 2013. Health education performance was positively correlated with education level, years of clinical experience, health promotion role recognition, and self efficacy for health education. Health promotion role recognition (${\beta}=.246$, p=.001), self-efficacy for health education (${\beta}=.282$, p <.001), and clinical experiences (${\beta}=.170$, p=.007) were significant predictors of health promoting hospital nurses' health education performance and explained 27.8% of the variance. The strategies to improve health promotion role recognition and self-efficacy for health education should be developed to improve health education performance of health promoting hospital nurses.