• Journal of the Korean Dietetic Association
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• v.13 no.3
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• pp.228-239
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• 2007

The purpose of this study was to identify the variables of foodservice employees's job satisfaction. The questionnaires to measure job satisfaction were completed by 323 employees in the Gyunggi province. Foodservice employees' job satisfaction was evaluated by the modified Smith method(1969). All statistical data analyses were conducted using the Statistical Package for the Social Science(SPSS version 12.0). The study results were as follows; 1. The demographic data showed that 65.3% of respondents aged in 40~49 years old, 96% were married, 68.8% were high school graduates, 10.2% were college graduates and 93.5% were contracted employees. 2. Factors that influenced job satisfaction among employees varied significantly. Older workers tended to be more satisfied in their job. In addition, those who had graduated college showed the highest job satisfaction score(3.03). Subjects who had graduated university showed the lowest job satisfaction score(2.05). Subjects who had worked for 2-3 years showed the highest satisfaction scores concerning their relationships with coworkers(3.33), whereas those who had worked less than 2 years showed the lowest (3.14). Regarding school type, employees working in high schools had the highest job satisfaction scores, whereas those working in middle schools had the lowest. Satisfaction of leaving school time, ‘after 4 pm group’ had the highest score(3.01). 3. The correlation between salary satisfaction and job satisfaction was significant(r=0.307, p<0.001). In addition, the correlation between job satisfaction and work satisfaction was also significant(r=0.444, p<0.001). The correlation between job satisfaction and satisfaction about relations with coworkers was significant(r=0.118, p<0.01). The correlation between salary satisfaction and work satisfaction was significant(r=0.308, p<0.001). The correlation between salary satisfaction and satisfaction about relation with coworkers not significant, but it was negative(r=0.307, p<0.001). The correlation between work satisfaction and satisfaction about relations with coworkers significant(r=0.210, p<0.001). According to this study, job satisfaction and salary were positively related. This study provides foodservice managers useful information for design positions that will increase productivity. Future study is needed to determine the factors that will improve job satisfaction and satisfy the employees' needs, which in turn will improve school food service quality.

• Journal of Korean Academy of Nursing
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• v.37 no.6
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• pp.863-871
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• 2007

Purpose: The purpose of this study was to investigate the factors influencing nurses' clinical decision making focusing on critical thinking disposition. Methods: The subjects of this study consisted of 505 nurses working at one of the general hospitals located in Seoul. Data was collected by a self-administered questionnaire between December 2006 and January 2007. Data was analyzed by one way ANOVA, Pearson correlation coefficients, and stepwise multiple regression using SPSS Win 14.0. Results: The mean scores of critical thinking disposition and clinical decision making were 99.10 and 134.32 respectively. Clinical decision making scores were significantly higher in groups under continuing education, with a master or higher degree, with clinical experience more than 5 years, or with experts. Critical thinking disposition and its subscales have a significant correlation with clinical decision making. Intellectual eagerness/curiosity, prudence, clinical experience, intellectual honesty, self-confidence, and healthy skepticism were important factors influencing clinical decision making(adjusted $R^2=33%$). Conclusion: Results of this study suggest that various strategies such as retaining experienced nurses, encouraging them to continue with education and enhancing critical thinking disposition are warranted for development of clinical decision making.

• Korean Journal of Veterinary Research
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• v.48 no.1
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• pp.33-38
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• 2008

In veterinary medicine amitraz has been used as an insecticide to eliminates mites, lice, and ticks in dogs, cats, goats, swine and cattle. The objective of present study was to developed an analytical method using one-step extraction and determination of the amitraz in veterinary drugs by liquid chromatography (LC). The amitraz was analyzed by LC equipped with Waters XTerra RP18 ($4.8{\times}250mm;\;5{\mu}m;\;Waters,\;USA$) analytical column, using 75% acetonitrile (acetonitrile/D.W; 75/25) at 1.0 ml/ min. The UV-VIS detection of amitraz was made at 290 nm. Calibration graphs were linear with very good correlation coefficients ($r^2>0.9999$) from $80{\sim}120{\mu}g/ml$. The limit of detection was $0.09{\mu}g/ml $ and limit of quantification was $0.27{\mu}g/ml $. The method showed good intra-day precision (CV 0.05~0.09%) and inter-day precision (CV 0.06~0.18%).

• Journal of the Korean Society of School Health
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• v.23 no.2
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• pp.115-124
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• 2010

Purpose: The purpose of this study was to investigate the effect of high school students' internet addiction on their health status. Methods: The subjects of the present study were 237 high school students in KyongBuk province. Self-reporting questionnaire survey was conducted during the period from September to October 2009. Collected data were analyzed using SPSS PC+14.0 through descriptive statistics, t-test, ANOVA, Scheffe's test and stepwise multiple regression analysis. Results: With regard to internet addiction, 33.9% is at the early stage of internet addiction and 2.1% is severely addicted to internet. Health status was poorer in female, students with low economic status, less attention to children's health by parents, neglecting their children's internet use, single-parent, and severely addicted to internet. Factors significantly influencing on the health status included gender, internet addiction, parent's attitude about internet using time, interest in their children's health, economic status and internet using time ($R^2$=25.8%). Conclusion: The education program for preventing internet addiction considering these affecting factors is necessary.

• Journal of Microbiology and Biotechnology
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• v.14 no.5
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• pp.919-923
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• 2004

The sk10 isolated from kimchi was identified as W. kimchii on the basis of l6s-rDNA sequencing. Studies were made to analyze the metabolic flux shift of the sk10 on glucose under aerobic growth conditions. The sk10 produced 38.2 mM acetate, 16.3 mM ethanol, and 33.2 mM lactate under aerobic conditions, but 2.4 mM acetate, 48.0 mM ethanol, and 44.1 mM lactate under anaerobic conditions. The NADH peroxidase (NADH-dependent hydrogen peroxidase) activity of sk10 grown under aerobic conditions was 11 times higher than that under anaerobic conditions. Under the low ratio of $NADH/NAD^+$, the metabolic flux toward lactate and ethanol was shifted to the flux through acetate kinase without NADH oxidation. The kinds of enzymes and metabolites of sk10 were close to those in the pathway of Leuconostoc sp., but the metabolites produced under aerobic growth conditions were different from those of Leuconostoc sp. The stoichiometric balance calculated using the concentrations of metabolites and substrate was about 97%, coincident with the theoretical values under both aerobic and anaerobic conditions. From these results, it was concluded that the metabolic flux of W. kimchii sk10 was partially shifted from lactate and ethanol to acetate under aerobic conditions only.

• Design & Manufacturing
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• v.11 no.1
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• pp.30-33
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• 2017

In this study, the mold technology for manufacturing of porous implant was investigated. Firstly, we considered the concept of insert molding technology with 3D printing of porous inert part. The part on implant was designed in the end region of the implant. And then main implant bodies were manufactured using conventional machining method. The other porous parts were designed and optimized with molding simulation. As the feature size of porous implant was so small that perfect feature of it using 3D printing technology could not be obtained. So, we proposed another scheme for manufacturing of the porous implant in the replace of the former approach. Polymer mold cores with 3D printing technology were considered. The effects of addictive manufacturing process parameters on the properties of mechanical and dimensional accuracy were investigated. Direct 3D printed polymer mold cores were designed and manufactured under the simulation of thermal and molding analysis. It was shown that 3D printed mold core with polymer could be adapted to the injection molding for porous implant.

• Biomedical Science Letters
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• v.7 no.3
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• pp.103-110
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• 2001

$\alpha$-Fetoprotein(AFP) is a good marker for the detection of several diseases such as hepatocellular carcinoma, gonadal germ cell tumor, gastric tumor, and Down's syndrome. In this study, we developed ELISA, using synthetic peptides corresponding to the epitopes of AFP. Five kinds of peptides were synthesized from AFP to produce antibodies in rats that recognize AFP in human plasma as well as amniotic fluid and do not cross-react with serum albumin. All five kinds of antibodies showed good reactivities with their peptide-keyhole limpet hemocyanin conjugates. Anti-synthetic peptide 1 (R-N-E-Y-G-I-A-S-I-L, 4-13) antibody, in particular, reacted well with AEP as well as synthetic peptide 1-KLH but not with human serum albumin. The binding affinity(Kd) was 2.7$\times$10$^{-9}$M for peptide 1 and 6.8$\times$10$^{-8}$M for AEP. The range for measurement of AFP was 10~1,000 ng/ml. The within-assay and between-assay coefficients of variance(CV) were 4.83% and 10.97%, respectively. In a sample of 31 sera and 33 amniotic fluids, there was a good correlation between AFP values determined in this assay and those in a commercial kit. These results indicate that the antibodies against synthetic peptides corresponding to the epitopes of AFP are highly specific to APP and synthetic peptide-based ELISA would be useful for the measurement of human AFP.

• International Journal of Advanced Culture Technology
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• v.11 no.4
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• pp.24-33
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• 2023

This research aimed to validate the Korean version of the Workforce Agility Scale (K-WAS) among care workers for community-dwelling frail elderly. The study involved 192 care workers from Gyengsangnam-do, who completed a structured questionnaire between May 31 and July 15, 2023. The K-WAS, a 13-item instrument measured on a 5-point Likert scale, captures three key aspects of workforce agility: proactivity, adaptability, and resilience. Confirmatory factor analysis was employed to ascertain the scale's construct validity. The K-WAS demonstrated a significant positive correlation with psychological empowerment (r=.560, p<.001), thereby establishing its criterion validity. Although the results suggest that the K-WAS is a valid and reliable tool for assessing workforce agility among care workers, further refinement is recommended. The K-WAS is anticipated to aid in the implementation and evaluation of interventions focused on enhancing workforce agility among care workers for frail elderly. By providing a valid and reliable measure of workforce agility, the K-WAS can facilitate the evaluation of these interventions' effectiveness in improving outcomes for the frail elderly and_ enhancing the overall quality of care delivery.

• The Korean Journal of Food And Nutrition
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• v.33 no.1
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• pp.64-73
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• 2020

The purpose of this study was to investigate the antioxidant activity and β-glucan content of extracts extracted by varying the temperature at 30, 55 and 80℃ after hot air drying or freeze drying of Pleurotus ostreatus and Pleurotus eryngii. For the analysis antioxidant activity of each mushroom, β-glucan, total phenol, flavonoid contents, and DPPH·ABTS⁺·Nitrite assay were measured. Also, the β-glucan content, total flavonoid content and ABTS⁺ scavenging activity increased with freeze drying rather than hot air drying, and increased with increasing extraction temperature in both mushrooms. However, the total phenol and nitrite scavenging activity increased with hot air drying rather than freeze drying, and decreased with increasing temperature in both mushrooms. DPPH scavenging activity was not significant in both mushrooms, but decreased with increasing extraction temperature. Pearson's correlations between total flavonoid content and antioxidant activities were r=0.719~0.753 (p<0.01). As a result, the β-glucan content, total flavonoid content, and ABTS radical cation scavenging activity were highest during freeze drying and extraction at 80℃. And the highest total phenol content, DPPH radical scavenging activity and nitrite scavenging activity were obtained during hot air drying and extraction at 30℃.

• Korean Journal of Remote Sensing
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• v.33 no.2
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• pp.125-134
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• 2017

Recent advance in the satellite-based remote sensing technology demands abilities to efficiently processthe massive satellite data. In thisstudy, we focused on developing GOCI Products Reprocessing System (GPRS) based on server virtualization and distributed processing in order to efficiently reprocess massive GOCI data. Experimental results revealed that GPRS allows raising the usage rates of memory and central processing unit (CPU) up to about 100% and 75%, respectively. This meansthat the proposed system enables us to save the hardware resources and increase the work process speed at the same time when we process massive satellite data.