• Journal of Microbiology and Biotechnology
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• v.20 no.3
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• pp.594-601
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• 2010

Azotobacter chroococcum H23 (CECT 4435), Azotobacter vinelandii UWD, and Azotobacter vinelandii (ATCC 12837), members of the family Pseudomonadaceae, were used to evaluate their capacity to grow and accumulate polyhydroxyalkanoates (PHAs) using two-phase olive mill wastewater (TPOMW, alpeorujo) diluted at different concentrations as the sole carbon source. The PHAs amounts (g/l) increased clearly when the TPOMW samples were previously digested under anaerobic conditions. The MNR analysis demonstrated that the bacterial strains formed only homopolymers containing $\beta$-hydroxybutyrate, either when grown in diluted TPOMW medium or diluted anaerobically digested TPOMW medium. COD values of the diluted anaerobically digested waste were measured before and after the aerobic PHA-storing phase, and a clear reduction (72%) was recorded after 72 h of incubation. The results obtained in this study suggest the perspectives for using these bacterial strains to produce PHAs from TPOMW, and in parallel, contribute efficiently to the bioremediation of this waste. This fact seems essential if bioplastics are to become competitive products.

• Structural Engineering and Mechanics
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• v.66 no.2
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• pp.151-160
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• 2018

With the aim to evaluate the fatigue damage accumulation and predict the residual life of engineering components under variable amplitude loadings, this paper proposed a new strain energy-based damage accumulation model by considering both effects of mean stress and load interaction on fatigue life in a low cycle fatigue (LCF) regime. Moreover, an integrated procedure is elaborated for facilitating its application based on S-N curve and loading conditions. Eight experimental datasets of aluminum alloys and steels are utilized for model validation and comparison. Through comparing experimental results with model predictions by the proposed, Miner's rule, damaged stress model (DSM) and damaged energy model (DEM), results show that the proposed one provides more accurate predictions than others, which can be extended for further application under multi-level stress loadings.

• Safety and Health at Work
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• v.11 no.2
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• pp.187-192
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• 2020

Background: This study investigated the relationship between verbal aggression against school teachers and upper extremity (neck, shoulder, upper limb, and/or upper back) musculoskeletal pain. Methods: This was a cross-sectional study of 525 elementary school teachers from Jaboatão dos Guararapes, Northeast Brazil. Results: The prevalence of upper extremity musculoskeletal pain among teachers who reported verbal aggression in the past six months (67.7%) was higher than that among those who did not report verbal aggression (51.7%): (prevalence ratio = 1.21; 95% confidence interval = 1.04-1.40). The prevalence of upper extremity musculoskeletal pain was associated with verbal aggression, sex, and common mental disorders, controlled by skin color, age, monthly income, teachers' education, years working as a teacher, workload, and obesity. Furthermore, the measure of the association between verbal aggression and upper extremity musculoskeletal pain was modified by sex and common mental disorders, considered altogether. Teachers who suffered verbal aggression, of the feminine sex, and also having common mental disorders reported high prevalence (85.4%) of upper extremity musculoskeletal pain. Conclusion: The association between verbal violence in the school and complaints of upper extremity musculoskeletal pain was strong and modified by teachers' sex and common mental disorders.

• The Journal of the Korea Contents Association
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• v.20 no.1
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• pp.658-667
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• 2020

The purpose of this study was to develop the Servant Leadership Scale-Pastoral Version(SLS-P). In order to accomplish the purpose of this study, analyzed the relationships of Christian tradition and servant leadership, explored the rationale about servant leadership measurements and 366 of the Christians were sampled through the cluster sampling. The finding of the study were as follows: First, The characteristics of servant leadership analyzed in Bible traditions and Jesus model. Second, The factorial structure of PHS was extracted as 5 factors (sharing, serving, caring, humbling, leading) with 23 items. Third, The utilizations of this SLS-P expects to be evaluated to the servant leadership program in the pastoral setting.

• ETRI Journal
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• v.32 no.1
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• pp.33-43
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• 2010

The increasing demand for non-sinusoidal currents affects the quality of distribution networks. Harmonic detection is a crucial step in the cancellation of those components by active power filters. In this paper, the discrete cosine transform (DCT) is compared with different implementations based on Fourier transforms, demonstrating their equivalences and the advantages provided by the former. We demonstrate that the phase error in the presence of grid frequency deviations and the transient length are reduced by half in comparison to the discrete Fourier transform. A novel algorithm is developed to provide frequency adaptation to the DCT, taking advantage of its good features. The window width is adjusted in real time according to the actual value of the grid fundamental frequency by means of a phase-locked loop. A technique based on dithering is employed to overcome the limitation caused by the truncation of the window number of samples, so the frequency resolution is enhanced. The theoretical approach is verified by simulated and experimental results.

• Journal of Korean Public Health Nursing
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• v.25 no.2
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• pp.209-220
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• 2011

Purpose: The study investigated the level of mutual cooperation among those engaged in public and private nursing and social welfare to understand contributing factors. Method: The subjects were 289 nurses and 279 social workers. The level of mutual cooperation between nurses and social workers was evaluated. taking into account related personal factors and organizational environmental factors. Results: The level of mutual cooperation between nursing and social welfare organizations showed the following sequence, in decreasing order; public nursing, public social welfare, private nursing and private social welfare personnel. The factors affecting nurses' cooperation with social welfare personnel were expected duties, understanding of social workers' service, service autonomy, service appropriateness, and the training environment of the organization. Factors influencing the level of cooperation of social workers with nurses included understanding of nursing service, understanding of the efficiency gained by cooperation, service appropriateness and the training environment of the organization. Conclusion: The development of training programs to increase the level of cooperation between the nursing and social welfare fields is strongly recommended.

• Journal of Radiation Protection and Research
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• v.37 no.3
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• pp.146-148
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• 2012

The use of GEANT4 simulation toolkit has increased in the radiation medical field for the design of treatment system and the calibration or validation of treatment plans. Moreover, it is used especially on calculating dose simulation using medical data for radiation therapy. However, using internal visualization tool of GEANT4 detector constructions on expressing dose result has deficiencies because it cannot display isodose line. No one has attempted to use this code to a real patient's data. Therefore, to complement this problem, using the result of gMocren that is a three-dimensional volume-visualizing tool, we tried to display a simulated dose distribution and isodose line on medical image. In addition, we have compared cross-validation on the result of gMocren and GEANT4 simulation with commercial radiation treatment planning system. We have extracted the analyzed data of dose distribution, using real patient's medical image data with a program based on Monte Carlo simulation and visualization tool for radiation isodose mapping.

• Journal of the Korean Society of Costume
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• v.60 no.4
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• pp.30-44
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• 2010

The definition of pregnancy has changed as society and its values have developed through different periods of history. In the ancient period, the definition of a woman's fertility was that female deities provided fecundity to barren women and barren land, and protected both the pregnant women during the period of gestation and also the land during the time of growth. These goddesses also administered the appropriate ceremonial rituals for conception and childbirth, and for planting and harvesting. After that, for the last 2,000 years, the most conspicuous icon has been "The Virgin Mary with the Infant Christ". Mary was the mother of Jesus Christ and model for Christian women. However, the centuries the image of woman and pregnancy has been changed, modern society through education, careers and job opportunities allows many women to be more than just a wife or a mother. Moreover, in the 21st century, many pregnant women want stylish maternity wear because they are proud and their minds are opened by these new icons of birth culture as like the pregnancy of many famous stars. From this the purposes of this study are as follows, Firstly, to study on the meaning of woman's fertility from ancient period to present time by social changes. Secondly, to investigate the historical concept of the maternity wear for current modern maternity fashion market. Finally, to expect to use this study would be helpful basic data for develop of the new researches of the maternity fashion in the future.

• Journal of East-West Nursing Research
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• v.21 no.2
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• pp.148-155
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• 2015

Purpose: This study examined image of nurses in relation to their job satisfaction perceived by hospital nurses. Methods: The subjects were 352 registered nurses working in two university hospitals and one general hospital. The data were collected from October 1 to October 30, 2012 using self-report questionnaires. The data were analyzed using the SPSS/WIN 18.0 program. Results: Mean scores for nurses' image and job satisfaction were $3.66{\pm}.44$ and $3.14{\pm}.33$. Significant positive correlation was found between image of nurses and job satisfaction perceived by hospital nurses(r=.515, p<.001). Conclusion: The result indicates that strategic plan for nursing practice is needed for improving nurses' image and job satisfaction perceived by nurses in hospitals.

• Advances in nano research
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• v.3 no.2
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• pp.81-96
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• 2015

Octahedral shaped single crystalline undoped and Ga-doped indium oxide nano-and microcrystals were fabricated using vapor-solid growth process. Effects of Ga doping on the crystallinity, defect structure, and optical properties of the nano-/microstructures have been studied using scanning electron microscopy, microRaman spectroscopy, transmission electron microscopy and cathodoluminescence spectroscopy. It has been observed that incorporation of Ga does not affect the morphology of $In_2O_3$ structures due to its smaller ionic radius, and similar oxidation state as that of In. However, incorporation of Ga in high concentration (~3.31 atom %) causes lattice compression, reduces optical band gap and defect induced CL emissions of $In_2O_3$ nano-/microcrystals. The single crystalline Ga-doped, $In_2O_3$ nano-/microcrystals with low defect contents are promising for optoelectronic applications.