• Korean Journal of Construction Engineering and Management
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• v.3 no.1 s.9
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• pp.115-123
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• 2002

Recently all basement floor of apartment site have utilized as parking area to use efficiently space and to ensure lawful parking car figure. And the top of parking area has used as working vehicle's path and materials' carrying area during construction. Thus because crack and leakage status in underground parking area of under construction or completion building generate excessively not only performance of structure is diminished but also flaw repair cost is put in a lot of. And abroad confidence is diminish. So this study is intended to diminish flaw focus on investigation of under construction and completion fields through examine closely cause of crack and leakage status of apartment house underground parking area and prepare countermeasure with respect to design, construction and maintenance.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.26 no.2
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• pp.31-38
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• 2018

The pilot aptitude test so far has been conducted with a dichotomous concept of cognitive factor and non-cognitive factor, so it was not easy to explain concrete factors about pilot aptitude. Therefore, an integrated approach is needed to construct pilot aptitude test including all factors that can predict pilot aptitude. In previous study, we developed questionnaire items for the Pilot Aptitude Personality Test(PAPT) which can predict the flight training achievement through personality and personal characteristics. And those items were categorized as personality, cognition, and motivation factors. The flight training grades were correlated with all the test factors of the items, and the cognitive factors were high. As a result of the regression analysis, the total score of the three factors together accounted for 16% of the flight training grades. The results of the ANOVA showed that the cognition factors and motivation factors had significant effects on the completion of the flight training. The factors of PAPT predicted not only the completion of the flight training but also the flight performance. This is because the existing paper-pencil pilot aptitude test can only discriminate the flight training completion status. This is also a result of the fact that the introductory flight training consists of various factors including not only basic cognition but also personality and motivation.

• Industrial Engineering and Management Systems
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• v.10 no.4
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• pp.247-254
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• 2011

In this paper, we study a single-machine scheduling problem with deteriorating processing time of jobs and multiple rate-modifying activities which reset deteriorated processing time to the original processing time. In this situation, the objective function is to minimize total completion time. First, we formulate an integer programming model. Since the model is difficult to solve as the size of real problem being very large, we design an improved genetic algorithm called adaptive genetic algorithm (AGA) with spontaneously adjusting crossover and mutation rate depending upon the status of current population. Finally, we conduct some computational experiments to evaluate the performance of AGA with the conventional GAs with various combinations of crossover and mutation rates.

• Journal of Korean Academy of Nursing
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• v.38 no.4
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• pp.620-628
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• 2008

Purpose: The purpose was to identify the effects of a Tai Chi exercise program on physical fitness, fall related perception and health status among institutionalized elderly. Methods: A quasi-experimental research was carried out with a nonequivalent control group pretest-posttest design. There were 23 subjects in the experimental group and 24 in the control group. The data was gathered by structured questionnaires about fall related perception, and health status. Physical fitness was measured by an exercise therapist with a blind principle. Results: At the completion of the 12 weeks Tai Chi exercise program, flexibility (F=4.50, p=.00), and ability to balance (F=3.27, p=.00) had increased significantly. Fall related perception showed significant improvement in the fear of falling (F=-3.52, p=.00). Physical functioning (F=3.38, p=.00), role limitation-physical (F=2.67, p=.01), role limitation-emotional (F=2.47, p=.02). and general health (F=3.88, p=.00) in health status showed significant differences between the two groups. Conclusion: The study findings revealed Tai Chi exercise as a useful nursing intervention for elderly that enhances flexibility and balance, decreases fall related perception and also increases the health status. Further research is warranted to compare the potential effects of Tai Chi exercise and its health benefits from other types of exercise or martial arts.

• Journal of the Korean Society for Library and Information Science
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• v.56 no.2
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• pp.109-132
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• 2022

The purpose of this study was to explore tasks for improving performance skills by comparing and analyzing the current status of reading marathon competitions operated in public libraries, and to provide guidelines for institutions to operating of this competition in the future. In order to achieve the research purpose, the competition status information collected in 2021 for five public libraries operating reading marathon competitions from before the COVID-19 pandemic were collected and the contents were compared and analyzed. As a result, the average period for five public libraries running a reading marathon was 10 years, and the average period for each year was 5.87 months. In addition, children had the highest rate of completion, and as compensation for completion, certificates were issued and the number of loans increased the most. However, the competition managers complained of difficulties in securing and increasing applicants and calculating the distance reached, so based on the analysis, they developed tasks to improve the performance of the reading marathon from several different solution suggestions.

• Journal of Korean Institute of Industrial Engineers
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• v.26 no.3
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• pp.238-248
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• 2000

Facilities are getting more automated and informative in modern manufacturing systems, especially in semiconductor and LCD plants. These systems keep a great deal of such information on its current and near-future status as the arrival time and job completion time of their parts. This paper presents an efficient policy for AGV and part routing using information on the future status of the system where AGVs are playing a central role for material handling. Efficient control of AGVs is very important because AGV systems often become the bottleneck and limit the total production capacity of a very expensive plant. The cell controller records the future events chronologically in Next Event Schedule, and uses this list to determine to which place the AGVs and parts to be sent.

• Industrial Engineering and Management Systems
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• v.2 no.1
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• pp.9-27
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• 2003

In a wafer fabrication factory, the completion time of an order is affected by many factors related to the specifics of the order and the status of the system, so is difficult to predict precisely. The level of influence of each factor on the order completion time may also depend on the production system characteristics, such as the rules for releasing and dispatching. This paper presents a method to identify those factors that significantly impact upon the order completion time under various combinations of scheduling rules. Computer simulations and statistical analyses were used to develop effective due date assignment models for improving the due date related performances. The first step of this research was to select the releasing and dispatching rules from those that were cited so frequently in related wafer fabrication factory researches. Simulation and statistical analyses were combined to identify the critical factors for predicting order completion time under various combinations of scheduling rules. In each combination of scheduling rules, two efficient due date assignment models were established by using the regression method for accurately predicting the order due date. Two due date assignment models, called the significant factor prediction model (SFM) and the key factor prediction model (KFM), are proposed to empirically compare the due date assignment rules widely used in practice. The simulation results indicate that SFM and KFM are superior to the other due date assignment rules. The releasing rule, dispatching rule and due date assignment rule have significant impacts on the due date related performances, with larger improvements coming from due date assignment and dispatching rules than from releasing rules.

• Proceedings of the IEEK Conference
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• 1999.06a
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• pp.1049-1052
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• 1999

We present a use. interface(UI) simulator for developing a mobile phone. This simulator consists of 3 major modules: Graphic Tool Editor, User Interface Software(UI), and Network Command Processor(NCP). The Graphic Tool Editor can design a virtual mobile terminal. The NCP sends a command to the phone and then receives its status from the phone after completion of the command. We can add or modify lots of features easily to the phone using the UI module. These modules can interact each other by sharing the common area in the memory. By doing so, these modules can exchange their status and data to operate in real-time. We have designed and tested a virtual prototyping phone for the LGP 3200 manufactured by LGIC by using the simulator. Through a series of experiment, we have believed that our virtual prototyping interactive simulator can do shorten its development and testing cycle by applying it in the early design phase.

• Journal of The Korean Association For Science Education
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• v.17 no.4
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• pp.511-524
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• 1997

The curriculum of science should be made of the education based on the acquirement instead of the knowledge. However, the present educational environment has many problems such as lack of laboratory and experimental facilities, and time limitations. One of the suggested methods to overcome the barriers in regular curriculum is the efficient operation of science club activities. Since the club activities are not restricted on time and space, teachers can apply various methods and programs. In this paper, we investigate the present operational status of science club activities in secondary school and some suggested improvement schemes of them It is shown that teacher training, reference development, time allocation, educational environment, facility completion and various program developments should be preceded, in order to activate science club activities.

• Proceedings of the Safety Management and Science Conference
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• 2008.11a
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• pp.569-578
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• 2008

The aim of this study is to propose economical safety driving speed index which those are geometric road status; examine the levels of which those cost-benefit of driving fuel expenditure; are search road safety design and operational technology for driving simulators. For the objective, we analyzed the current status of driving fuel expenditure and driving scenarios by the road alignments, and reviewed driving and technical specifications by the geometric types of road according to the implementation, and extended completion. Throughout the result of this study, diverse related driving information provision service, efficiently driving system is expected to be implemented in the national highway design system.