• 한국전기화학회:학술대회논문집
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• 2004.11a
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• pp.75-108
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• 2004

The market, development and trend of Lithium ion Batteries in China are introduce briefly. Early, Chinese manufactories were busy to expand and many new battery factories have been built up. Now, the relatively large companies pay more attentions on comprehensive quality improvement, therefore the production processing and facilities have been also modified in some extent. The recent technology progresses focus on High capacity (energy density), High rate, High average voltage, High safety, High temperature properties, Long cycle life, Low temperature properties, Low self discharge, Low cost, Super-large, Super-small, Super-thin, Consistency, Customization, and Environment friendly processing, simply $H_5L_4S_3C_2E_1$. Lithium ion polymer batteries which all batteries packaged with soft lamination film are named as in China have a quick growth and emphasized here because of their advantages ins $H_5L_4S_3C_2E_1$ for which it is quite difficult to be realized at the same time. Some of research works such as listed above are introduced. The other contends related to application trend of Lithium ion batteries and projects carrying out are also included.

• Journal of the Semiconductor & Display Technology
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• v.22 no.4
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• pp.76-80
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• 2023

This study is about a service that allows people to naturally learn to bask in the sun, which is a habit to relieve depression. Modern people do not have enough time to bask in the sun due to their busy lives, and as a result, depression and fatigue are increasing day by day. Therefore, in order to relieve depression, there is a need for the development of technology to manage the schedule of sunlight basking so that users can experience sunlight more naturally. The sunlight service developed through this study can help you easily plan your sunlight schedule by recommending good dates, times, and locations for sunbathing. In addition, users can receive coins as much as they bask in the sun, and they can be motivated by the act of basking in the sun by raising their character with those coins.

• Journal of information and communication convergence engineering
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• v.22 no.3
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• pp.199-206
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• 2024

The network security of Plug-and-Charge (PnC) technology in electric vehicle charging systems is typically achieved through the well-known Transport Layer Security (TLS) protocol, which causes high communication overhead. To reduce this overhead, a differential authentication method employing different schemes for individual users has been proposed. However, decisions use a simple threshold approach and no quantitative performance evaluation should be made. In this study, we determined each user's trust using several machine learning algorithms with their charging patterns and compared them. The experimental results reveal that the proposed approach outperforms the conventional approach by 41.36% in terms of round-trip time efficiency, demonstrating its effectiveness in reducing the TLS overhead. In addition, we show the simulation results for three user authentication methods and capture the performance variations under CPU busy waiting scenarios.

• Journal of Korea Society of Industrial Information Systems
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• v.29 no.1
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• pp.63-76
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• 2024

In this study, we analyzed queue length and sojourn time of discrete-time BMAP/G/1 queues under the workload control. Group customers (packets) with correlations arrive at the system following a discrete-time Markovian arrival process. The server starts busy period when the total service time of the arrived customers exceeds a predetermined workload threshold D and serves customers until the system is empty. From the analysis of workload and waiting time, distributions of queue length at the departure epoch and arbitrary time epoch and system sojourn time are derived. We also derived the mean value as a performance measure. Through numerical examples, we confirmed that we can obtain results represented by complex forms of equations, and we verified the validity of the theoretical values by comparing them with simulation results. From the results, we can obtain key performance measures of complex systems that operate similarly in various industrial fields and to analyze various optimization problems.

• Journal of the Korea Institute of Building Construction
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• v.8 no.6
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• pp.139-145
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• 2008

The objective of this paper is to analyze the construction management capacity of Choseon Dynasty and suggest a new interpretation on the construction capacity of the time management by reviewing the time management case during a representative construction project, HwaSungk construction project implemented in the latter period of Choseon Dynasty around 200 years ago. which was described in HwaSungSungYoukEuGye. The analysis results of the time management capacity during the latter period of Choseon Dynasty depicted in the HwaSungSungYoukEuGye is summarized as follows: (1) It took 2 years and 6 months to complete the Hwasung construction project. However, all of the single buildings were constructed within 6 months, a relatively short period of time. Judging from the fact, it can be assumed that the construction techniques using wood of the time were very sophisticated. (2) When the HwaSung was constructed, it took a relatively short period of time to complete works from placing the foundation to erecting columns and to placing a crossbeam on the columns. Based on the fact, it can be also inferred that assembly processing techniques of the time were also sophisticated and the level of member processing and assembling techniques of the time was considerably good as well. (3) The HwaSung construction was continued throughout the year without any influence by weather conditions, which tells us that division of labor by work was performed, and it was possible to mobilize labor force for the construction project even during the busy farming seasons.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.39 no.2
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• pp.1-10
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• 2016

In this paper, we present a new way to derive the mean cycle time of the G/G/m failure prone queue when the loading of the system approaches to zero. The loading is the relative ratio of the arrival rate to the service rate multiplied by the number of servers. The system with low loading means the busy fraction of the system is low. The queueing system with low loading can be found in the semiconductor manufacturing process. Cluster tools in semiconductor manufacturing need a setup whenever the types of two successive lots are different. To setup a cluster tool, all wafers of preceding lot should be removed. Then, the waiting time of the next lot is zero excluding the setup time. This kind of situation can be regarded as the system with low loading. By employing absorbing Markov chain model and renewal theory, we propose a new way to derive the exact mean cycle time. In addition, using the proposed method, we present the cycle times of other types of queueing systems. For a queueing model with phase type service time distribution, we can obtain a two dimensional Markov chain model, which leads us to calculate the exact cycle time. The results also can be applied to a queueing model with batch arrivals. Our results can be employed to test the accuracy of existing or newly developed approximation methods. Furthermore, we provide intuitive interpretations to the results regarding the expected waiting time. The intuitive interpretations can be used to understand logically the characteristics of systems with low loading.

• Journal of the Institute of Electronics and Information Engineers
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• v.50 no.3
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• pp.71-77
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• 2013

In the information flooded situation having many thing to do, the efficient scheduling of energy and time is regarded as a very important thing for the busy modern people. Because the efficient time scheduling already became a very important key factor for a successful life, the more elaborately designed intelligent system than the previous simple event oriented scheduling system should be supported. Accordingly in this paper we propose Classified Job Scheduling System in which jobs are classified by Time value & Importance and allocated to Time frame efficiently. Especially the new method is proposed with the policy that processes the job with high time value first and concurrently allocates the job of low time vale & high importance to the preempted fixed area of time frame for continuous processing of job which has a key of success in the future.

• Journal of the Korean Society of Clothing and Textiles
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• v.23 no.4
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• pp.593-600
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• 1999

The wedding business in getting specialized and subdivided lately. Due to this current the importance and the necessity of the software for wedding business emerged. So far people who were preparing for their wedding have usually picked up their wedding dress from the pictures on the brochure at the wedding dress shop. But it costs the customers time and money and most of all they can not satisfy their customers with the completed wedding dress sometimes. Moreover customers pay a lot of money for the wedding dress just because they wear the wedding dress once in their whole life. This is unreasonable actually. To solve these problems to help the customers choose their wedding dress that they really like and to provide the wedding dress with good price we developed this software. The purpose of this research is to help people who will marry soon save their time and money in this busy world by showing the shape of the wedding dress before the dress is completed. They can see if the dress goes well with them before it is sewed by seeing the imaginary wedding dress on the computer screen. We are trying to maximize the customer's satisfaction with this research. It is the idea of this research to differentiate this new concept of wedding dress from other existing concepts by grafting this software on companies' accumulated experience in marketing and diffusing this software through the country.

• 제어로봇시스템학회:학술대회논문집
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• 2003.10a
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• pp.2106-2111
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• 2003

In this paper we discuss an algorithm for a real time transmission of moving color images on the TCP/IP network using wavelet transform and neural network. The image frames received from the camera are two-level wavelet-trans formed in the server, and are transmitted to the client on the network. Then, the client performs the inverse wavelet-transform using only the received pieces of each image frame within the prescribed time limit to display the moving images. When the TCP/IP network is busy, only a fraction of each image frame will be delivered. When the line is free, the whole frame of each image will be transferred to the client. The receiver warns the sender of the condition of traffic congestion in the network by sending a special short frame for this specific purpose. The sender can respond to this information of warning by simply reducing the data rate which is adjusted by a back-propagation neural network. In this way we can send a stream of moving images adaptively adjusting to the network traffic condition.

• Journal of Korean Physical Therapy Science
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• v.17 no.1_2
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• pp.11-21
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• 2010

Background: This study was undertaken to evaluate how gender differences affect the sensory processing by the Adolescent/Adult Sensory Profile(ASP) which evaluates the behavioral responses of adults to everyday sensory experiences. Methods: The study period lasted one month which was June 2009, and the study subjects were 325(three hundred twenty five) people who were healthy and reside in Chungcheong province including Daejeon. Detailed information about the study was explained to the study group and the ASP questionnaires were drawn up by them personally. Results: On average, the study group scores similarly in low registration, sensation seeking, sensory sensitivity, and sensation avoiding. According to the sensory processing abilities by gender, the group obtained scores indicating performance similar to most people in low registration, sensation seeking, and sensory sensitivity, except for sensation avoiding. Furthermore, in the taste/smell processing of "I only eat familiar foods", sensation avoiding score was higher in females than males, and in the activity level of "I find time to get away from my busy life and spend time by myself", males' sensation avoiding scored higher than females. Conclusion: In the study of differences of sensory processing abilities of adults by gender using the ASP, gender differences were revealed in the category of sensation avoiding.