• The KIPS Transactions:PartA
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• v.14A no.6
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• pp.363-370
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• 2007

The ubiquitous computing environment could provide better service to users by adapting to changing contexts. In this paper, we developed a context adaptation system, which enables an ubiquitous program to adapt to different contexts, following its adaptation rules. Using this system, programmers can develop ubiquitous programs suitable for changing contexts, by describing the context adaptation policy. The context adaptation engine of this system fits the ubiquitous program to the current context based on the context adaptation rules. This system was implemented using JCAF, context-aware programing framework based on java. A simulator is also provided to simulate ubiquitous programs by changing contexts.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.20 no.2
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• pp.399-407
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• 1996

A fuzzy learning algorithm to get the optimal fuzzy rules is presented in this paper. The algorithm introduces a reference model to generate a desired output and a performance index funtion instead of the performance index table. The performance index funtion is a cost function based on the error and error-rate between the reference and plant output. The cost function is minimized by a gradient method and the control input is also updated. In this case, the control rules which generate the desired response can be obtained by changing the portion of the error-rate in the cost funtion. In SISO(Single-Input Single- Output)plant, only by the learning delay, it is possible to experss the plant model and to get the desired control rules. In the long run, this algorithm gives us the good control rules with a minimal amount of prior informaiton about the environment.

• Journal of the Korea Society for Simulation
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• v.8 no.3
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• pp.49-66
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• 1999

Semiconductor wafer fabrication is known to be one of the most complex manufacturing processes due to process intricacy, random yields, product diversity, and rapid changing technologies. In this study we are concerned with the impact of lot release and dispatching policies on the performance of semiconductor wafer fabrication facilities. We consider several semiconductor wafer fabrication environments according to the machine failure types such as no failure, normal MTBF, bottleneck with low MTBF, high randomness, and high MTBF cases. Lot release rules to be considered are Deterministic, Poisson process, WR(Workload Regulation), SA(Starvation Avoidance), and Multi-SA. These rules are combined with several dispatching rules such as FIFO (First In First Out), SRPT (Shortest Remaining Processing Time), and NING/M(smallest Number In Next Queue per Machine). We applied the combined policies to each of semiconductor wafer fabrication environments. These policies are assessed in terms of throughput and flow time. Basically Weins fabrication setup was used to make the simulation models. The simulation parameters were obtained through the preliminary simulation experiments. The key results throughout the simulation experiments is that Multi-SA and SA are the most robust rules, which give mostly good performance for any wafer fabrication environments when used with any dispatching rules. The more important result is that for each of wafer fabrication environments there exist the best and worst choices of lot release and dispatching policies. For example, the Poisson release rule results in the least throughput and largest flow time without regard to failure types and dispatching rules.

• 중국학논총
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• no.64
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• pp.23-51
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• 2019

All research methodologies have a certain research purpose and application range. Therefore, it cannot be conclusively said that some methodologies are superior. Each research methodology has only different research purposes and application ranges. The various theories and methodologies related to the study of Chinese dialect sounds have not been in a confrontational relationship with each other. But the need for analysis of new phenomena has led to the emergence of new methodologies and it has been deepening the depth of the study together, supplementing the theories of the past. The emergence of new theories and methodologies has not only always provided another means for dialect analysis methods, but has also deepened awareness of the changing rules of dialects, the interrelationships between rules and the causes of change. The Chinese dialect is richly embedded in various phenomena that can be seen in human languages. In analyzing the phenomenon of the Chinese dialect, we should first closely observe and judge whether it is the result of internal historical changes in the dialect itself or changes formed by contact or influence with the external dialect, and apply the analytical method accordingly. Sometimes there is a phenomenon formed by a number of complex factors, not one, that requires a comprehensive analysis that combines a variety of theories and methodologies.

• Journal of Institute of Control, Robotics and Systems
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• v.5 no.7
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• pp.808-813
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• 1999

A fuzzy learning method to control an unstable and multivariable system is presented in this paper, Because the multivariable system has generally a coupling effect between the inputs and outputs, it is difficult to find its modeling equation or parameters. If the system is unstable, initial condition rules are needed to make it stable because learning is nearly impossible. Therefore, this learning method uses the initial rules and introduces a cost function composed of the actual error and error-rate of each output without the modeling equation. To minimize the cost function, we experimentally got the Jacobian matrix in the operating point of the system. From the Jacobian matrix, we can find the direction of the convergence in the learning, and the optimal control rules are finally acquired when the fuzzy rules are updated by changing the portion of the errors and error rates.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.43 no.3
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• pp.10-20
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• 2020

This paper presents a method to measure the similarity of assigned jobs in the gravure printing operation based on the chromaticity and color sequence, and order the jobs accordingly. The proposed dispatching rule can be used to fulfill diverse manufacturing site requirements because the parameters can be adjusted to prioritize chromaticity and color sequence. In general, dispatching rules either ignore the job-changing time or require that the time be clearly defined. However, in the gravure printing operation targeted in this study, it is difficult to apply the general dispatching rule because of the difficulties in quantifying the job-changing time. Therefore, we propose a method for generalizing assignment rules of the job planner, allocating relative similarity among assigned jobs, and determining the sequence of jobs accordingly. Chromaticity priority is determined by the arrangement of the color assignments in the printing operation; color sequence priority is determined by the addition, deletion, or change in a specific color sequence. Finally, the job similarity is determined by the dot product of the chromaticity and color sequence priorities. Implementation of the proposed dispatching rule at an actual manufacturing site showed the planner present the same job order as that obtained using the proposed rule. Therefore, this rule is expected to be useful in industrial sites where clear quantification of the job-changing time is not possible.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.41
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• pp.267-292
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• 2009

It is a right time to improve the Korea Foreign Trade Act(KFTA) as a fundamental law on Rules of Origin(RoO) in the global trade circumstances which are summarized FTA and WTO. The KFTA's RoO constitutes the labelling system of the Country of Origin, the criterion of it, the issuing of certificate of origin and the punishing offender mainly around the importing goods. This study has focused on the problems of KFTA's RoO at the macro and practical level, and proposed the programs to improve the KFTA's RoO about importing, exporting and domestic production goods. KFTA need to create a purpose clause to protect consumers and industries also, and has to be located a general and top position in the RoO of Korea. In the concrete, the labelling system of the Country of Origin has to set limited in the point of minimum necessity view. The criterion of the Country of Origin also has to improve the wholly obtained criterion, the changing in tariff classification criterion, value added criterion and processing operation criterion to harmonize WTO Rules of Origin and FTA Rules of Origin. The punishment ceiling against offender has to raise to guarantee the effectiveness of RoO.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.35 no.1
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• pp.5-26
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• 2024

The school library work support system was newly developed as 2024 Doksero DLS, but the DLS-compliant cataloging rules have not changed significantly since it was initially developed, and the current developed cataloging guidelines in 2020 also need to be updated. This study is to propose the considerations for developing guidelines for applying the DLS cataloging rules based on KCR4 by comparing the existing DLS (Ver. 2.0) cataloging rules, the 2024 DLS cataloging rules, and the 2020 bibliographic registration guidelines (Ver. 2.2). On this basis, considerations were suggested in terms of changing and expanding data elements, revising content rules for cataloging, method for recording access point, and developing controlled vocabularies. This study will allow to implement revision of DLS cataloging rules, development of guidelines, and system improvements.

• Journal of the Korea Safety Management & Science
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• v.18 no.1
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• pp.57-64
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• 2016

The leisure life pattern of people is changing to a familial and enthusiastic way that eventually develops the camping culture. Thus, the number of campers and the size of camping market have been dramatically increased due to significant expansion of camping people. However, many camp grounds and facilities are operating without a proper registration by government rules and regulations. In addition, many of electronic and gas equipment and tools are not used in a safe way and in a safety regulatory boundary. Therefore, campers at the camping ground is situated in a fire and safety hazard. In addition, there is limitation in rules and regulations associated with camping ground safety and fire. This study analyzed the fire and hazard guidelines and rules regulations of developed countries of campground and compared them to the current situation in South Korea. Therefore, this study is to develop a safety and fire hazard guidelines and rules and regulations related to camp ground operation, gas and electronic equipment operation and management. The study will eventually reduce the future fire and safety incidents in a campground in South Korea.

• Journal of the Korea Society of Computer and Information
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• v.23 no.10
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• pp.103-109
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• 2018

In this paper, we propose a dynamic document classification method which breaks away from existing document classification method with artificial categorization rules focusing on suppliers and has changing categorization rules according to users' needs or social trends. The core of this dynamic document classification method lies in the fact that it creates classification criteria real-time by using topic modeling techniques without standardized category rules, which does not force users to use unnecessary frames. In addition, it can also search the details through the relevance analysis by calculating the relationship between the words that is difficult to grasp by word frequency alone. Rather than for logical and systematic documents, this method proposed can be used more effectively for situation analysis and retrieving information of unstructured data which do not fit the category of existing classification such as VOC (Voice Of Customer), SNS and customer reviews of Internet shopping malls and it can react to users' needs flexibly. In addition, it has no process of selecting the classification rules by the suppliers and in case there is a misclassification, it requires no manual work, which reduces unnecessary workload.