• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.11
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• pp.5033-5043
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• 2012

The purpose of this study is to complement the problem of lecture evaluation items and to improve the lecture evaluation items to fit to original purpose of lecture evaluation to enhance the lecture's quality. For this, meanings of good teaching, lecture evaluation domains and elements of preceding study, the contents and problems of lecture evaluation tools in A college were searched, and in this foundation, an improved lecture evaluation tool was suggested. As the result of this study, important features of the improved tool are followed: First, the compositions of evaluation domains, evaluation elements, and evaluation items were reconstituted. Second, to acquire the important information for the better lecture, the items were devised according to the features of good teaching in colleges. Third, the items concerned of evaluation elements which is commonly suggested by the lecture evaluation tools of preceding study were developed. Forth, if there is the information which is required for the enhancement of the lecture quality, the items were developed though the result could not be presented in the arithmetical means. Fifth, evaluation items to improve the problems of lecture evaluation tools which had been carried out in A college were developed.

• Journal of Korean Academy of Nursing Administration
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• v.17 no.4
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• pp.484-492
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• 2011

Purpose: The aims of study were; (1) to evaluate the validity and sensitivity of a fall-risk assessment tool, and (2) to establish continuous quality improvement (CQI) methods to monitor the effective use of the risk assessment tool. Methods: A retrospective case-control cohort design was used. Analysis was conducted for 90 admissions as cases and 3,716 as controls during the 2006 and 2007 calendar years was conducted. Fallers were identified from the hospital’s Accident Reporting System, and non-fallers were selected by randomized selection. Accuracy estimates, sensitivity analysis and logistic regression were used. Results: At the lower cutoff score of one, sensitivity, specificity, and positive and negative predictive values were 82.2%, 19.3%, 0.03%, and 96.9%, respectively. The area under the ROC was 0.60 implying poor prediction. Logistic regression analysis showed that five out of nine constitutional items; age, history of falls, gait problems, and confusion were significantly associated with falls. Based on these results, we suggested a tailored falls CQI process with specific indexes. Conclusion: The fall-risk assessment tool was found to need considerable reviews for its validity and usage problems in practice. It is also necessary to develop protocols for use and identify strategies that reflect changes in patient conditions during hospital stay.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2003.10a
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• pp.412-419
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• 2003

The most product is manufactured by mould in usual life. From drawing to manufacturing is to be automatically. But inspection is handwork usually. An alternative idea of this problem is reverse engineering. In this study, press forming is measured by 3D non-contact coordinate measuring machine and problem will be analyzed by comparing with 3D data Through the study, it will achieve improvement of press mould process.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.5 no.3
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• pp.66-72
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• 1996

The applicability of a new method, termed the whirling motion concept, for the improvement of the surface finish in milling three-dimensional sculptured surfaces has been investigated. A method for implementing this concept o conventional NC machines that utilize a suitably configured attachment has been proposed. The tool path equation for the ball-end milling process, based on the surface-shaping system, has been obtained. Both results of the computer simulation and the experiment verified the proposed approach.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 1998.10a
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• pp.121-124
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• 1998

It is well known that during the oxygen cutting residual thermal stresses are produced in weldment. Surface compressive residual stress is one of reasons for improvement on fatigue durability. To reduce the residual stress and improve the fatigue strength applied the impact loading in oxygen cutting frame. After applying the impact loading, redistribution of residual stress was measured by cutting method and tested fatigue tests.

• Journal of Nutrition and Health
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• v.33 no.5
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• pp.548-555
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• 2000

The purpose of this study were to : a) establish quality managements standards and performance indicators in order to define the concept of the hospital food and nutrition services, b) develop a self evaluation tool for quality management applicable to dietetic department's CQI program on the basis of the estabilished quality management standers, c) investigate the factual quality of hospital food and nutrition services throught the result of the application study of the quality management tool and the perceived quality by the patients servery, and d) verify the validity of the quality management tool through analysing the correlation between the factual quality and the preceived quality. The quality management standards were classifie dinto 3 parts, 'Nutrition Care', 'Foodservice Operation', and 'Management Function'. There consisted of 72 quality management standards and 293 performance indicators. The developed quality evaluation tool using 5-Likert scale was performance at 45 general hospitals over 400 beds in Seoul and Kyungki-do. Also, 1,573 patients in 42 hospitals were participated in the patient survey. The result of quality evaluation tool application study showed that 17 standards were relatively high(more than 4.5) and 22 relatively low(less than 4.0) in score. The categorical mean scores of $\ulcorner$Nutrition Care$\lrcorner$, $\ulcorner$Foodservice Operation$\lrcorner$and $\ulcorner$Management Function$\lrcorner$ were respectively 60.7, 162.8, and 73.5 Each mean score was conversed to 81.0, 83.5, and 81.7 on the basis of 100 point scale, but the range of score was very wide between hospitals. The Cronbach's $\alpha$ was more than 0.6 in 59 quality management standards, this result verified reliability of the quality management tool was proved. The factual quality showed positive correlation with the perceived quality. Therefore, this result verified the criterion validity of the quality management tool.

• Journal of Power Electronics
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• v.15 no.5
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• pp.1149-1157
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• 2015

As a key part in the wind turbine system, the power electronic converter is proven to have high failure rates. At the same time, the failure of the wind power converter is becoming more unacceptable because of the quick growth in capacity, remote locations to reach, and strong impact to the power grid. As a result, the correct assessment of reliable performance for power electronics is a crucial and emerging need; the assessment is essential for design improvement, as well as for the extension of converter lifetime and reduction of energy cost. Unfortunately, there still exists a lack of suitable physic-of-failure based evaluation tools for a reliability assessment in power electronics. In this paper, an advanced tool structure which can acquire various reliability metrics of wind power converter is proposed. The tool is based on failure mechanisms in critical components of the system and mission profiles in wind turbines. Potential methodologies, challenges, and technology trends involved in this tool structure are also discussed. Finally, a simplified version of the tool is demonstrated on a wind power converter based on Double Fed Induction Generator system. With the proposed tool structure, more detailed information of reliability performances in a wind power converter can be obtained before the converter can actually fail in the field and many potential research topics can also be initiated.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2005.06a
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• pp.1879-1882
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• 2005

Due to increase of demands on safety and convenience for automotive vehicle, the use of DC motor, such as power window, seat adjusting, pedal adjusting, sunroof, electric shift motor and so on, is increasing rapidly in the whole world. Worm gear is an important part to transmit torque to another gear in gear mechanism of automotive DC motor. But with current forming process, it has some problems in manufacturing and the quality. Also, the characteristics of automotive parts such as price and mass-production limit the quality improvement. Recently several methods are used in order to reduce a worm screw machining time and to maintain precision. In this paper, we introduce whirling tool machining and side milling cutter machining as effective manufacturing method of worm screw and study on the cutting force of side milling cutter and whirling tool in worm screw machining.

• 한국정보통신설비학회:학술대회논문집
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• 2006.08a
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• pp.39-42
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• 2006

There are various analysis functions(including prediction of path loss, analyzing of capacity and coverage, etc.) of simulation tool to design and optimize the mobile communication network. Its reliability absolutely effects the performance of mobile communication network. Especially as the wireless network highly advancing focused on data service, it more needs to research and develop on the standard establishment of reliability of the simulation tool. Also it is important the systematic research how to improve the reliability of simulation tool. In this paper, to give the concrete process and skill about how to improve reliability, we define the kinds of reliability at first. And then we explain the comparison results between real field measurement data and theoretic simulation data.

• Journal of the Korean Society for Precision Engineering
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• v.27 no.12
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• pp.84-91
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• 2010

The bonding process of LCD panel is attaching an inner lead to an outer lead in the production line of LCD panel module. It is composed of an OLB process and a PCB bonding process. Since bonding tool assembly is one of the core parts of the bonding equipment that determines the durability and performance of the final product, much design efforts to enhance uniformity and efficiency of the process have been made. In this paper, FE analyses have been employed to determine the bonding tool size. Bonding tool of long bar shape has been simplified as a piece with same heater pitch, and appropriate boundary conditions such as convection and radiation are considered. Thermal analysis results by the FEM have been validated by the experiments. With the use of FE analysis varies design parameters and the corresponding effects have been evaluated. It was observed that the approach presented in this paper could be employed for the design of LCD module bonding tool.