• Journal of Information Management
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• v.42 no.3
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• pp.71-94
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• 2011

Query by visual example is the principal query paradigm for expressing queries in a content-based image retrieval environment. Query by image and query by sketch have long been purported as being viable methods of query formulation yet there is little empirical evidence to support their efficacy in facilitating query formulation. The ability of the searcher to express their information problem to an information retrieval system is fundamental to the retrieval process. The aim of this research was to investigate the query by image and query by sketch methods in supporting a range of information problems through a usability experiment in order to contribute to the gap in knowledge regarding the relationship between searchers' information problems and the query methods required to support efficient and effective visual query formulation. The results of the experiment suggest that query by image is a viable approach to visual query formulation. In contrast, the results strongly suggest that there is a significant mismatch between the searchers information problems and the expressive power of the query by sketch paradigm in supporting visual query formulation. The results of a usability experiment focusing on efficiency (time), effectiveness (errors) and user satisfaction show that there was a significant difference, p<0.001, between the two query methods on all three measures: time (Z=-3.597, p<0.001), errors (Z=-3.317, p<0.001), and satisfaction (Z=-10.223, p<0.001). The results also show that there was a significant difference in participants perceived usefulness of the query tools Z=-4.672, p<0.001.

• Journal of Digital Convergence
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• v.12 no.11
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• pp.575-583
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• 2014

The purpose of this study was to investigate factors affecting depression among female marriage immigrants in relation to demographic, family, self-efficacy, acculturation, and physical health aspects. The subjects were 556 marriage immigrants residing in Seoul, Keong-gi, and Chung-cheong areas. 47.1% of the subjects showed $${\geq_-}16$$ of CES-D which is the cutting points on depression. The results from hierachical regression analysis indicated that family income(${\beta}=-.13$, p=.002) at the first demographic model and self-efficacy(${\beta}=-.13$, p<.001), family relationship(${\beta}=-.16$, p<.001), acculturation to Korean culture(${\beta}=-.08$, p=.05), acculturative stress(${\beta}=.31$, p<.001), and mal-physical health(${\beta}=.18$, p<.001) at the final model affected female marriage immigrants' depression. The explanatory power of these variables was 37.1%. Based on these results, social services and policies for the prevention of depression among female marriage immigrants were discussed.

• Journal of Digital Convergence
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• v.18 no.8
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• pp.301-310
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• 2020

The purpose of this study was to provide data to develop the nursing intervention program to improve the quality of life by identifying the factors affecting the quality of life in patients with herpes zoster. The data were collected in 141 patients with herpes zoster from September 1 to December 31, 2016 and analyzed by multiple regression analysis using SPSS/WIN 23.0. As a result, the pain level of the herpes zoster was 5.23±2.11, the perceived health status was 3.35±1.04, the self efficacy was 66.36±10.79, the family support was 42.093±8.68, the social support was 59.80±20.42. And the health related quality of life was 74.12±5.73 points. Affecting factors influencing the quality of life of the subjects were perceived health status, Living with family status, and the explanatory power of these variables was 39.0%. Therefore, the health-related quality of life of patients was increased according to positive perceived health status Based on this study, in order to improve the quality of life of patients with herpes zoster, it is necessary for the nurse to arrange a proper mediation plan that can help the positive health condition perception of the patients. It is necessary to develop an effective nursing intervention program based on the influencing factors confirmed in this study.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.10
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• pp.40-46
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• 2019

The purpose of this study is to investigate the effect of positive psychological capital on re-employment attitudes of youth in their 20s dealing with an unemployment rate of more than 10%. The effect of positive psychological capital on attitudes for re-employment was analyzed by domain, and is based on variables of positive psychological capital composed of self-efficacy, hope, resilience, and optimism. As a result, hope (3.64) was the highest on the scale; however, resilience (at 3.37) was the lowest. In the analysis of positive psychological capital, the university graduate group (3.89) was the highest. But, the high school graduate group (3.25) was the lowest. In the results for re-employment attitude based on education level, the university graduate group (4.93) was the highest, but the high school graduate group (3.80) was lowest. The main variables influencing re-employment attitude were (in order): hope, optimism, self-efficacy, and resilience. These factors have an explanatory power for the four variables of around 25%. Overall, young adults (in their 20s) have higher levels of positive psychological capital because they have a higher education level. Also, higher educated re-employed applicants have higher positive psychological capital and attitudes for re-employment, compared to the other groups.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.4
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• pp.129-136
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• 2019

This study was conducted to identify the health promotion behavior of patients with pulmonary tuberculosis and examine the factors influencing this behavior. The subjects were 152 outpatients who were treated for pulmonary tuberculosis at the national tuberculosis hospital located in M City. Data were collected from July to September, 2016 and analyzed using the t-test, ANOVA, Duncan's test, Pearson's correlation coefficient, and multiple regression analysis. Health promotion behavior was negatively correlated with physical symptoms, perceived barriers, and depression, but positively correlated with self-efficacy. The most powerful variable influencing health promotion behavior was depression and the model showed an explanatory power of 63.5%. The results of this study suggest that it is necessary to employ a variety of strategies to practice and maintain the health promotion behavior of pulmonary tuberculosis patients to decrease their depression and provide psychological support.

• Journal of Digital Convergence
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• v.17 no.4
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• pp.159-166
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• 2019

This paper investigated convergent factors to turnover intention among some Administrative Staff in Medical Institutions(ASMI). The survey used self-administered questionnaires for 320 administrative staffs of 27 medical institutions in the J region, selected arbitrarily from July 2, 2018 to July 27, 2018. The hierarchical multiple regression analysis shows the following results. The turnover intention of respondents turned out to be significantly higher in following groups: a group in which organizational commitment is lower, a group in which organizational loyalty is higher, a group in which exhaustion, cynicism, reduced professional efficacy, sub-areas of job burnout are higher. The results show explanatory power of 50.9%. The results of the study indicate that the efforts, to increase organizational commitment and organizational loyalty, and to decrease exhaustion, cynicism, reduced professional efficacy, sub-areas of job burnout, are required to improve the turnover intention among ASMI. These results could be used in hospital organization personnel management and industrial health education to lower the level of turnover intention in ASMI, vocational aptitude education of health care college students. In following studies, it is necessary to present and analyze the structural model affecting the turnover intention of ASMI.

• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.31 no.2
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• pp.138-146
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• 2021

Objectives: This study aims to compare and evaluate the reduction efficiency of disinfectants used in the domestic meat processing industry to reduce bioaerosol exposure of meat industry workers and to use this as basic data for establishing work environment management measures. Methods: Thirteen disinfectants sold in South Korea were selected for evaluation and the bacterial reduction effect of the disinfectants was investigated. Bacterial suspension and surface disinfection tests were conducted to compare and analyze the antibacterial strength of the disinfectants. Pork carcasses, cutting boards, benches, and conveyor belts were selected for surface sterilization tests. Results: As a result of the bacterial suspension experiment test, all disinfectants had a bacterial reduction efficiency of more than 86%. Among them, the bacterial reduction efficiency of chlorine disinfectants was 99.93% on average. In the results of the pork carcass surface sterilization test, the rate of reduction of disinfectants made of quaternary ammonium compounds (QACs) was the highest. Tests of plastic cutting boards showed that chlorine disinfectants had the best sterilization effect. Experiments on stainless steel benches showed the best bacterial reduction efficiency for chlorine dioxide and QACs disinfectants. In the conveyor belt made of urethane, QACs disinfectants showed excellent sterilization effects. Conclusions: The study evaluated the disinfection power of disinfectants against bacteria occurring in domestic meat processing plants. All disinfectants were found to be effective in bacterial suspension experiments, and chlorine disinfectants were particularly effective. In surface sterilization experiments, sterilizing agents with QACs as the main ingredient were excellent.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.47 no.4
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• pp.333-340
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• 2021

In this study, Rosa multiflora was sampled through extraction, concentration, and freezing. The antioxidant efficacy of a mixture of R. multiflora extract and ascorbic acid was compared with a single ascorbic acid. The purpose of this study was to analyze the antioxidant efficacy through the synergistic effect of R. multiflora extract and ascorbic acid. The experiment measured electron donating ability, ABTS+ radical scavenging, SOD-like activity, xanthine oxidase inhibition activity, reducing power, FRAP, polyphenolic content measurement, and flavnoid content measurement. As a result, the complex showed higher antioxidant activity than the control group (ascorbic acid) in the electron donating ability test and the xanthine oxidase inhibitory activity test. In the case of the flavonoid content experiment, it was confirmed that RMW+A (272.1 mg QE/g), RME+A (90.6 mg QE/g), and RMW+A (79.4 mg QE/g) at a concentration of 100 ㎍/mL had a higher flavonoid content than the control group (19.0 mg QE/g). Therefore, the extract and ascorbic acid complex exhibited a synergistic effect compared to the single use. Therefore, it is thought that this complex will contribute to product stabilization and skin aging inhibition when used in antioxidant cosmetics.

• Journal of IKEEE
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• v.28 no.1
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• pp.97-103
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• 2024

Some drugs can offer far better medical effectiveness as it is injected through the intradermal layer of the skin, known as a needle-free injection. However, conventional needle-free devices might deliver a relatively large amount of drug in a just single spot of skin, splitting open the tissue layer structure, which might cause bruising and bleeding. By injecting the small volume with a fast repetition rate in a large surface area of skin, the patient may get much fewer injuries and pain. To achieve that specification, the driving force must be instantaneous and short-pulsed. Such a form of an injection device has been developed but the efficacy of those devices has been rarely examined. Therefore, this study developed the laser-induced microjet device that ejects microjet whose speed is ~310 m/s, during the 400~800 ㎲ of pulse time. The device can eject ~1 µL of the drug at the rate at which each shot repeated 10 shots per second. Using this specification, we evaluated the efficacy of drug injection onto mouse models. After injecting the insulin solution into the mouse model, the blood insulin level is detected, resulting in 20 % of blood insulin level with the ordinary needle syringe injection method.

• Journal of the Korean Applied Science and Technology
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• v.41 no.2
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• pp.159-171
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• 2024

This study confirmed the antioxidant activity and antimicrobial efficacy and formulation stability for the effectiveness experiment of Rumex crispus. L root extract. For antioxidant activity, DPPH radical scavenging, FRAP activity, ABTS+ radical scavenging, and SOD-like activity were performed. Antimicrobial activity was evaluated for Staphylococcus epidermidis, Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli and Candida albicans strains. In addition, skin containing Rumex crispus. L root extract is checked over time for pH, temperature, and daylight for 21 days. As a result of antioxidant evaluation, it was confirmed that the activity increased in a concentration-dependent manner at a concentration of 0.0625-1 mg/mL. The clear zones of each bacterium at 100mg/mL concentrations were 10.45±0.34, 9.77±0.59, 9.92±0.22, and 10.08±0.12, which were superior to the control group Methyl paraben, and the antibacterial power of S. aureus and E. coli was confirmed at 100mg/mL concentration for MIC. There was little change in absorbance when the pH of the skin was 4.0, 6.0, and 7.0 and At 4℃, 25℃, and 40℃, it was discolored as the temperature increased. It was also observed that discoloration occurred when exposed to daylight. This is presumed to be able to prevent discoloration when it is shielded and stored at low temperatures. When the results of this study are summarized, Rumex crispus. L root extract is considered to have high value in use as a cosmetic raw material that can expect antioxidant and antibacterial activities.