• 중환자간호학회지
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• 제10권1호
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• pp.31-40
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• 2017

Purpose: The purpose of this study was to identify the factors influencing on burnout in operating room nurses. Methods: Using a cross-sectional design, a total of 109 operating room nurses working at 7 general hospitals with 300 beds or more in B city were analyzed. The instruments used for this study assessed job stress, resilience, professional identity, and burnout. Data was analyzed using descriptive statistics, a t-test, an ANOVA, a Pearson's correlation coefficient and a multiple regression analysis. Results: There was a statistically significant correlation between burnout and job stress (r=.53, p<.001), resilience (r=-.59, p<.001), and professional identity (r=-.47, p<.001). The factors influencing burnout include job stress (${\beta}=.27$, p<.001), resilience(${\beta}=-.37$, p<.001), dissatisfaction with the nursing job (${\beta}=.32$, p<.001), and moderate satisfaction with the nursing job (${\beta}=.19$, p=.014), and the explanatory power was 53.0%. Conclusions: The results suggest that intervention to reduce job stress and to improve resilience, which were the factors influencing burnout in operating room nurses, is necessary.

• 대한산업공학회지
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• 제29권4호
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• pp.259-270
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• 2003

In order to properly design warning sounds that are affectively suitable to computer users, warning sounds used in Windows operating system were analyzed in terms of their sound properties; frequency band, spectral characteristics and physical intensity. A total of 36 warning sounds (3*4*3) were generated and tested with respect to three experimental variables. Among 178 collected affective adjectives that are related to hearing and sounds, seven representative affective adjectives were abstracted by statistical grouping techniques. In the experiment, subjective preference tests were performed for the 36 warning sounds according to the seven affective factors. From the result, the affective factors were again grouped into three major factors and the 60dB boost-type warning sounds at the low frequency band were, in general, the most preferred. followed by the 70dB cut-type sounds at the middle frequency band. These warning sounds have a characteristic of boost power spectrum below 1000Hz frequency band and received good scores on simplicity, clarity and accurateness.

• 한국정보통신학회논문지
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• 제19권2호
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• pp.258-264
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• 2015

본 연구에서는 최초로 출현한 모바일 운영시스템인 Palm OS을 시작으로 주요 모바일 운영 시스템의 성공과 실패에 영향을 미치는 요인들이 무엇인지 제시하였다. 이를 위하여 성공한 사례와 실패한 사례에 대한 분석을 실시하고, 성공과 실패에 영향을 미치는 주요 변수를 도출한 후 이를 기반으로 ID 3 알고리즘 기반의 귀납적 분석을 실시하였다. 이를 통하여 모바일 운영 시스템의 성공과 실패에 있어서의 규칙들을 도출하여, 모바일 운영 시스템이 상업적으로 성공하는데 혁신성과 글로벌화 관점에서 전략적 시사점으로 제시하였다.

• 한국수소및신에너지학회논문집
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• 제23권6호
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• pp.604-611
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• 2012

For the commercialization of fuel cell powered vehicle, it is highly important to improve the performance and efficiency of an automotive polymer electrolyte membrane fuel cell (PEMFC) system. The performance and efficiency of PEMFC systems are significantly influenced by their operating conditions. Among these conditions, the system operating pressure is considered as the one of the main factors. In this study, to investigate the effects of operating pressure on the performance and efficiency of automotive PEMFC systems, two types of high-pressure operating PEMFC systems adopting two different compressors (i. e. different performance maps) are modeled by using MATLAB/Simulink environment. The PEMFC system efficiency and parasitic compressor power are mainly analyzed and compared for the two types of high-pressure operating PEMFC systems under the same system net power conditions. It is expected that this kind of study can contribute to provide basic insight into the operating strategies of high-pressure operating PEMFC systems for automotive use.

• 한국안전학회지
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• 제30권1호
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• pp.87-93
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• 2015

Most incidents and accidents involved human during operating NPPs have a tendency to be structured by complicated and various organizational, individual, and environmental factors. The salient feature of the human error in NPP was extremely low frequency, extremely high complicated and extremely serious damage of human life and property. Our research team defined as 'rare human errors'. To prevent the rare human errors, the most researchers and analysts insist invariably that the root causes be made clear. The making them clear, however, is difficult because their root causes are very various and uncertain. However, These tools have limits that they do not adapt all operating situations and circumstances such as design base events. The purpose of this study is to improve the rare human error hazards consider the situational contex. Through this challenging try based on evidences to the human errors could be useful to prevent rare and critical events can occur in the future.

• 전기학회논문지
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• 제65권3호
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• pp.504-510
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• 2016

In general, a fault locator is installed in Sub-Station of AT(Auto-transformer) feeding system to estimate the fault location and to protect the Korean AT feeding system. Since the line impedance characteristic is different to normal 3-phase transmission line, we need particular modification factors, which can be calculated using fault location recording data, to estimate the accurate fault location. Up to recently, forcible ground test has been used to calculate the modification factors of the fault locator. However, large amount of current is occurred when the forcible ground test is performed, and this current affects to adjacent equipments. Therefore, we proposed a novel calculation method of modification factors, arbitrary trip test, using boosting current of the operating electric train. Through several field test, we confirmed that modification factors for fault locator can be easily calculated by using proposed method. Moreover, we verified the accuracy and stability of the proposed calculation method.

• Journal of Preventive Medicine and Public Health
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• 제26권3호
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• pp.442-456
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• 1993

Financial stability is the foremost prerequisite for the continuous growth and development of hospitals. The present study aimed at developing a deterministic model using the factors which affect the hospitals profitability and at discovering which factor affected the hospital profitability. The study conducted questionnaire surveys on all general hospitals, with the exception of special hospitals, with over eighty hospital beds. Of the 274 subject hospitals, 136 of them, consituting 49.6% of the whole, were used in the study. The results are as follows. 1. In the deterministic model, outpatient revenue was affected more by the number of physician visits than by outpatient service intensity. Inpatient revenue was found to be affected more by the number of discharged patients than by inpatient service intensity. However, the increase rate of the service intensity not only contributed in stepping up the operating margin by $4{\sim}8%$ in outpatient and $3{\sim}6%$ in inpatient, but it was statistically significant. 2. Among the factors which determined the operating cost within the deterministic model, the number of patients had a greater impact on the operating cost than the resource consumption per patient. 3. The resource consumption per patient were proved to have the greatest effect on the profitability within the probabilistic model. The management cost per adjusted patient, in particular, was proven to have a statistically significant effect on the profitability in all hospitals.

• 대한간호학회지
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• 제45권5호
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• pp.761-772
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• 2015

Purpose: This study was done to evaluate the experience of securing patient safety in hospital operating rooms. Methods: Experiential data were collected from 15 operating room nurses through in-depth interviews. The main question was "Could you describe your experience with patient safety in the operating room?". Qualitative data from the field and transcribed notes were analyzed using Strauss and Corbin's grounded theory methodology. Results: The core category of experience with patient safety in the operating room was 'trying to maintain principles of patient safety during high-risk surgical procedures'. The participants used two interactional strategies: 'attempt continuous improvement', 'immersion in operation with sharing issues of patient safety'. Conclusion: The results indicate that the important factors for ensuring the safety of patients in the operating room are manpower, education, and a system for patient safety. Successful and safe surgery requires communication, teamwork and recognition of the importance of patient safety by the surgical team.

• 기업가정신과 벤처연구
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• 제20권2호
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• pp.1-16
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• 2017

본 연구에서는 해외에 진출한 중견기업을 대상으로 혁신성공요인과 혁신성과를 알아보고자 하였다. 보다 구체적으로는 경영자, 조직, 종업원 차원의 요인과 관련하여 리더십, 운영시스템, 변화주도행위를 혁신역량에의 영향 변수로 설정하였으며 혁신역량이 혁신성과에 미치는 영향을 실증 연구를 통해 파악해 보고자 하였다. 더불어 혁신역량에의 영향요인과 혁신성과에 미치는 영향이 본국과 해외진출국가 에서 어떠한 차이가 나는지를 알아보았다. 실증 분석 결과 혁신영향요인 모두 혁신역량에 긍정적 영향을 미치고 있었으며, 혁신역량은 혁신성과에 긍정적 영향을 미치고 있었다. 영향력의 정도에 있어서는 운영시스템, 리더십, 변화주도행위의 순으로 나타났다. 국가간 차이에 있어서는 중국의 경우 운영시스템, 리더십, 변화주도행위의 순이나 큰 차이는 없는 것으로 나타났다. 한국의 경우는 운영시스템과 리더십은 긍정적 영향을 미치나, 종업원의 개별적 변화주도행위는 혁신역량에 영향을 미치지 않는 것으로 나타났다. 본 연구 결과는 해외 진출 기업에게 있어서는 현지 특성에 맞는 혁신역량 강화 노력이 필요하다는 점과 한국의 경우 보다 고도화된 혁신역량 및 혁신성과의 창출을 위해서 종업원 개인의 변화주도행위를 이끌어 내도록 하는 추가적인 활동이 요구됨을 보여주고 있다.

• 설비공학논문집
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• 제17권11호
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• pp.974-980
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• 2005

The optimization of design factors on the frosting performance of a fin-tube heat exchanger is carried out using Taguchi method. The fin spacings of the heat exchanger are selected as design factors. Optimum values of the design factors under operating conditions of a household refrigerator/freezer are proposed. The average heat transfer rate and operating time of the optimum models, compared to those of a reference model, are increased at most by $6.5\%$ and $12.9\%$, respectively.