• 임상간호연구
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• 제17권2호
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• pp.251-261
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• 2011

Purpose: The purpose of this study was to investigate the relationship between clinical knowledge and provision of pressure ulcer care and to identify factors associated with performance of care. Methods: Participants were 202 nurses working in one of 6 small to medium hospitals. Self-report questionnaire were used and data were collected from December 11 to 18, 2009. Results: Mean score for knowledge about pressure ulcer care was 0.81. In subcategories, knowledge of risk factors inducing pressure ulcers was 0.93, knowledge of assessment of pressure ulcers was 0.90, and knowledge of treatment methods for pressure ulcers was 0.61. Mean score for performance of care activities for patients with pressure ulcers was 3.63/5. There was a significant positive correlation between knowledge and performance (r=.319, p<.001). According to multiple regression analysis, general perception (${\beta}=.306$, p<.001), knowledge (${\beta}=.247$, p<.001), and hospital size (${\beta}=.156$, p= .015) had an impact on the extent of nurses' performance of pressure ulcer care. Conclusion: Study results indicate that further education on pressure ulcer care is necessary to enhance nurses' knowledge about pressure ulcers and to increase rate of performance of pressure ulcer care.

• FOCUS: LIFE SCIENCE
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• 제1호
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• pp.7.1-7.4
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• 2024

The document "Understanding the Relationship Between Particle Size, Performance, and Pressure" explores the impact of particle size on chromatographic performance and system pressure. The study highlights how smaller particles can improve separation efficiency by providing higher resolution and faster analysis times. However, this comes at the cost of increased backpressure, which can challenge the system's hardware and require higher operating pressures. The document discusses the balance needed between particle size, column dimensions, and system pressure to optimize performance without exceeding the pressure limits of chromatographic systems. It outlines the advantages of using superficially porous particles (SPPs) over fully porous particles (FPPs) in achieving high efficiency with lower backpressure. The study also emphasizes the importance of selecting appropriate column dimensions and flow rates to manage system pressure while maintaining optimal performance. In conclusion, understanding the interplay between particle size, performance, and pressure is crucial for optimizing chromatographic separations, ensuring system longevity, and achieving high-quality analytical results.

• 동력기계공학회지
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• 제13권4호
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• pp.31-37
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• 2009

The purpose of this numerical study was to investigate performance characteristics for cooling tower axial fans with sweep. Performance data for the fans with various sweep angles were obtained in terms of the setting angle at a constant flow rate. Viscous flow calculations were carried out to obtain Performance data of the total pressure rise and hydraulic efficiency. A solution of the Ffowcs Williams-Hawkings equations was used to calculate the sound pressure level at three times fan diameter away from the fan. The calculated performance data well represented performance characteristics of the cooling tower axial fan. The total pressure rise and hydraulic efficiency at the same setting angle decreased with sweep angle. Sound pressure level slightly decreased for the fan with a sweep angle of 10 degree. No significant effect of the sweep geometry was found on the sound pressure level.

• The Journal of Asian Finance, Economics and Business
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• 제8권1호
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• pp.863-871
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• 2021

This study aims to document empirically the mediating role of corporate social responsibility (CSR) on the influence of competitive pressure toward business performance on the batik industry in Central Java, Indonesia. This study also examined the effect of competitive pressure and CSR on business performance of small- and medium-sized enterprises (SMEs) in the batik industry in Central Java. This study used an explanatory quantitative approach. Samples of 254 MSEs in the batik industry have been successfully collected. Hypothesis testing uses SEM-PLS. The results of this study indicate that competitive pressure has a positive and significant effect on the batik MSEs business performance in Central Java. Competitive pressure also has positive direct effect on corporate social responsibility, and CSR has a significant and positive direct effect on business performance. The results of this study have successfully documented empirically that CSR has a mediating role on the relationship of competitive pressure toward business performance in the batik MSEs in Central Java, Indonesia. This study provides a comprehensive understanding of the owners of the batik MSMEs in coping with competitive pressure by using CSR as a strategy to create uniqueness that is difficult to imitate and can create an organizational reputation that eventually can increase business performance.

• The Journal of Asian Finance, Economics and Business
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• 제7권12호
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• pp.329-336
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• 2020

This study aims to assess the impact of competitive pressure and innovation capability on business performance in small- and medium-sized enterprises (SMEs) in the batik industry in East Java, Indonesia. Furthermore, this study explores the impact of competitive pressure on business performance through innovation capability as a mediating variable. This research was quantitative using primary data with questionnaire as a method of sampling collection. The measurement of the variables was captured using Likert scale. The respondents were small- and medium-sized enterprises (SMEs) in the batik industry in East Java Province, Indonesia. The sample totaled 254 subjects. The data analysis was done using SEM-PLS. The results of the study show that: 1) there was a positive direct impact of competitive pressure on business performance; 2) competition pressure positively influences innovation capability; 3) innovation capability positively influences business performance; and 4) innovation capability has a partial mediating role in the effect of competitive pressures on business performance. The findings of this study suggest that managers in SME's batik industry should increase their effort to cope with the high competitive pressure to increase the innovation capability, so that they can have an advantage to face successfully competitors, leading to higher business performance.

• 품질경영학회지
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• 제43권3호
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• pp.299-312
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• 2015

Purpose: This paper analyzes the phenomenon on the degradation of the electrical performance by the pressure in the manufacturing process of sandwich type radomes. Methods: This paper consists of two steps to analyze the relation between the electrical performance and the pressure. First, the thickness of the core of the flat panels which were fabricated with different pressure was measured with the microscope, and then the electrical performance of the flat panels was analyzed with simulation and experiment. Based on the results of the electrical performance and the measured thickness with respect to the flat panels, the relation between the electrical performance and the applied pressure in the manufacturing process was analyzed. Results: The simulated and measured results with respect to the flat panel shows that the high pressure results in the nonuniform thickness of the core, which is applied to the radome fabrication. As a result, the degradation of the electrical performance occurs because the unintended scattered field is generated as the electromagnetic wave transmits (or impinges upon) the radome. Furthermore, we observed that the electrical performance of both the flat panel and the radome got worse as the high pressure was applied. Conclusion: Through simulation and experiment, therefore, it is demonstrated that for the high pressure in the manufacturing process the nonuniform thickness of the core increases and results in the degradation of the electrical performance of the radome.

• 성인간호학회지
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• 제21권1호
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• pp.95-104
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• 2009

Purpose: To examine pressure ulcer care from the standpoints of perceived importance, educational needs, knowledge and performance among clinical nurses. Methods: This descriptive study was conducted with a convenient sample of 289 nurses from four hospitals. Questionnaire data collected from June to August 2008 was analyzed using descriptive statistics, t-test, ANOVA, and Pearson's correlation coefficients. Results: The mean scores of importance and educational needs concerning pressure ulcer care were high, performance was moderate, and knowledge was low. Knowledge level differed significantly according to career, performance differed significantly according to pressure ulcer care education and the main healer(the person primarily responsible for treatment). Perceived importance differed significantly according to the main healer, and educational needs differed significantly according to working area and the main healer. Significant correlations were evident between performance and importance, performance and educational needs, importance and knowledge, and importance and educational needs. Conclusion: Focus on perceived importance and educational needs to clinical nurses about pressure ulcer care may be beneficial to improve knowledge and practice of pressure ulcer care, and should be reflected in the development of effective programs to enhance relevant nursing skills.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2008년도 춘계학술대회 논문집
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• pp.572-575
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• 2008

Flow-field design has much influence over the performance of proton exchange membrane fuel cell (PEMFC) because it affects the pressure magnitude and distribution of the reactant gases. To obtain the pressure magnitude and distribution of reactant gases in four kinds of flow-field designs without additional measurement equipment, computational fluid dynamics (CFD) analysis was performed. After the CFD analysis, the performance values of PEMFC according to the flow-field configurations were measured via a single cell test. As expected, the pressure differences due to different flow-field configurations were related to the PEMFC performance because the actual performance results showed the same tendency as the results of the CFD analysis. A large pressure drop resulted in high PEMFC performance. So, the single serpentine configuration gave the highest performance. On the other hand, the parallel flow-field configuration gave the lowest performance because the pressure difference between inlet and outlet was the lowest.

• 동력기계공학회지
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• 제18권6호
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• pp.13-20
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• 2014

The steady-state, incompressible and three-dimensional numerical analysis was carried out to evaluate turbulent models on the aerodynamic performance of a small-size axial fan(SSAF). The prediction performance on the static pressure of all turbulent models is going downhill at the high static pressure and low flowrate region, but has improved at the axial flow region. In consequence, all turbulent models predict the static pressure coefficient with an error performance less than about 4% after the region of the flowrate coefficient of about 0.14. Especially, the turbulent model of SST $k-{\omega}$ shows the best prediction performance equivalent to an error performance less than about 2% on the static pressure.

• Journal of Biosystems Engineering
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• 제27권6호
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• pp.491-500
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• 2002

This study was carried out to investigate experimentally the effect of the tire inflation pressure of a tractor on soil compaction and tractive performance. Two kinds of field experiments were conducted using an agricultural tractor. One experiment is concerned with the tractive performance of the tractor at the three levels of tire inflation pressure; 50kpa, 100kpa and 200kpa, and the other one is about the soil compaction at the four levels of tire inflation pressure; 50kpa, 100kpa, 150kpa and 200kpa, at three different numbers of passes; 1, 3 and 5 passes. From the results of the field experiment, it was found that decreasing the tire inflation pressure decreased the motion resistance of tractor and increased the tractive force and tractive efficiency. The tractive and working performance of the tractor could be improved by the reduction of tire inflation pressure. Increasing the inflation pressure and the number of passes increased the soil compaction. Rate of compaction increased rapidly at the first pass and declined at subsequent passes. To reduce the effect of soil compaction for the whole field, it is recommended that tractor should follow the rut of the first pass from the subsequent passes, and decrease the inflation pressure of the driving tires up to allowable minimum level.