• Journal of the Institute of Electronics Engineers of Korea SD
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• v.46 no.1
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• pp.68-75
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• 2009

As the recent performance of microprocessor is improving quickly, the necessity of cache is growing because of the increase of the access time of main memory. Every block of direct-mapped cache maps to one cache line. Although the mapping rule is simple, if different blocks map to one cache line, the miss ratio will be higher than the set-associative cache due to conflicts. In this paper, for the improvement of the direct-mapped cache of OpenRISC, 4-way set-associative cache is proposed. Four blocks of the main memory of the proposed cache map to one cache line so that the miss ratio is less than the direct-mapped cache. Pseudo-LRU Policy, which is one of the Line Replacement Policies, is used for decreasing the number of bits that store LRU value. The OpenRISC core including the 4-way set-associative cache was verified with FPGA emulation. As the result of performance measurement using test program, the performance of the OpenRISC core including the 4-way set-associative cache is higher than the previous one by 50% and the decrease of miss ratio is more than 15%.

• School Mathematics
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• v.5 no.4
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• pp.401-420
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• 2003

We have many problems in the teaching and learning of proof, especially in the demonstrative geometry of middle school mathematics introducing the proof for the first time. Above all, it is the serious problem that many students do not understand the meaning of proof. In this paper we intend to show that teaching the meaning of proof in terms of historic-genetic approach will be a method to improve the way of teaching proof. We investigate the development of proof which goes through three stages such as experimental, intuitional, and scientific stage as well as the development of geometry up to the completion of Euclid's Elements as Bran-ford set out, and analyze the teaching process for the purpose of looking for the way of improving the way of teaching proof through the historic-genetic approach. We conducted lessons about the angle-sum property of triangle in accordance with these three stages to the students of seventh grade. We show that the students will understand the meaning of proof meaningfully and properly through the historic-genetic approach.

• Journal of Korean Elementary Science Education
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• v.25 no.4
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• pp.339-351
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• 2006

The purpose of this study was to analyze the processes of observation teaching and the types of observation in elementary life science class. For the purposes of this study, 40 teachers majoring in elementary science education participated in surveys on the processes of observation teaching. In addition, after videotaping the observation classes conducted by three teachers, each teaching in the 3rd to 5th grade, and their one hundred and eight students, we analyzed the processes of observation teaching. As a result, the processes of observation leaching in elementary science class were categorized into 12 stages (motivation, stating the objective, recognizing objects to observe, free and subjective observation, introducing ways to observe, observing by the simple way, introducing additional ways, observing by the manipulative way, making a note of observation, looking over the contents of observation, finding regularities, consolidation). In the types of observation, teachers and students performed mostly simple observing by the visual way. Teachers introduced time-independent/non-compared/whole observing; students concentrated on time-independent/non-compared/particular observing as targets. Thus, students carried out observing in the types of observation that teachers had presented. Consequently, the analysis about the processes of observation teaching can establish an effective teaching program for observing in scientific activities by reconstructing its observing target and suitable topic. The analysis about the types of observation can be applied to set up strategies for improving observation skills.

• The Journal of the Convergence on Culture Technology
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• v.5 no.4
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• pp.191-202
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• 2019

The purpose of this study was to investigate the nursing behavior and delegation status of nursing hospital nurses and to provide basic data for improving the quality of medical services. The subjects of this study were data collected from July 26 to December 23, 2013, for 140 nurses with more than 3 years of experience in nursing hospitals. Collected data were analyzed by frequency analysis, mean and standard deviation, independent t-test and One way ANOVA of SPSS 20.0 statistical program. Collected data were analyzed by frequency analysis, mean and standard deviation, independent t-test and one way ANOVA of SPSS 20.0 statistical program.. As a result of this study, the case of delegation of nursing behavior was higher in case of no protocol of nursing delegation procedure than in case of having protocol. This study suggests that nursing practice of nursing hospital nurses can be a major factor in declining the quality of medical services in the absence of specified standards or procedures for delegation. Procedures, methods and guidelines are required.

• Journal of the Architectural Institute of Korea Planning & Design
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• v.36 no.5
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• pp.93-103
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• 2020

The purpose of this study is to suggest a supervisory way to improve the efficiency of Building Supervision using Deep Learning, especially object detecting technology. Since the establishment of the Building Supervision system in Korea, it has been changed and improved many times systematically, but it is hard to find any improvement in terms of implementing methods. Therefore, the Supervision is until now the area where a lot of money, time and manpower are needed. This might give a room for superficial, formal and documentary supervision that could lead to faulty construction. This study suggests a way of Building Supervision which is more automatic and effective so that it can lead to save the time, effort and money. And the way is to detect the hoop-bars of a column and count the number of it automatically. For this study, we made a hoop-bar detecting network by transfor learnning of YOLOv2 network through MATLAB. Among many training experiments, relatively most accurate network was selected, and this network was able to detect rebar placement in building site pictures with the accuracy of 92.85% for similar images to those used in trainings, and 90% or more for new images at specific distance. It was also able to count the number of hoop-bars. The result showed the possibility of automatic Building Supervision and its efficiency improvement.

• Korean journal of communication and information
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• v.21
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• pp.35-62
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• 2003

This study is conducted to achieve following two purposes. First, this study investigates domestic conditions and problems of data broadcasting industry. Second, this study suggests the improving way of the legal and administrative systems in order to promote domestic data broadcasting industry. Survey was conducted with 16 companies and a few business men for gaining data of general condition and analyzing problems about domestic data broadcasting industry. The results are as follow: first, domestic industry was suffering from the lack of man power, finance, and the delay of data broadcasting service schedule. Second, respondents argued there was no the legal basis and the systematic regulation under the current digital broadcasting policy of government. To resolve those problems, this paper proposed the making laws preparing for the fusion service of communication and broadcasting, systematic assistance of government, the way of technology development and technical standardization, and the way of constructing infrastructure and cultivating man power.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.2
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• pp.361-371
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• 2016

This study examined the factors influencing the happiness of employees of the SME manufacturing industry. Data were collected from 139 employees using structured questionnaires, and were analyzed by a t-test, one way-ANOVA, Pearson's correlation coefficient, and Hierarchical regression analysis using SPSS/WIN Ver 18.0 program. In general characteristics, happiness was significantly associated with age, level of education, religion, monthly income, monthly income satisfaction, position in the working area, and way of working. Happiness was positively correlated with self-esteem and perception of interpersonal caring behavior, and was negatively correlated with job stress. The factors influencing happiness was self-esteem and perception of interpersonal caring behavior, which explained 46.6%. Self-esteem and the perception of interpersonal caring behavior should be considered for improving the happiness of employees. The results will form the basis of nursing interventions to increase employees' happiness in the SME manufacturing industry.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.6
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• pp.3667-3674
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• 2014

The purpose of this study was to survey the perceptions and attitudes of university students towards the disabled. The subject's were 794 students from "D" University. The collected data was analyzed using a t-test, one-way ANOVA, Scheff$\acute{e}$ Test. For the disabled daily life and care-givers, many students considered that the disabled needed to be cared for by the government or public organizations. The students also considered that there would be no adverse effects on education if there was a special school in their village. They collected information related to the disabled from mass communication. They came up with government support being the most effective way of improving the awareness of the disabled. The specific positive attitudes about the disabled were as follows: emotional, behavioral, cognitive, and interchange. The attitudes for the disabled people showed a difference according to gender and grade. The results of the study showed that the perception and attitudes can be established based on the information collected.

• The Journal of the Korea Contents Association
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• v.13 no.5
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• pp.9-18
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• 2013

This research attempts to investigate the way of establishing a systematic and consistent review results by utilizing DB system of broadcasting content, which has been operated by Korea Communications Standards Commission. The current problems of DB system was analyzed and compared with review system of other contents regulating organizations to seek better alternatives. The results show that related information are recorded in review DB of other organizations in detail, so that committee members can utilize DB system in making consistent and objective judgment. In addition, other contents regulating organizations open the review results to the public and enhance the accessibility, so that people can make use of the DB. It is necessary to improve review DB in a systematic and efficient way for broadcasters and contents productions to accept and consent the review results.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.12B
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• pp.1498-1508
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• 2011

A cloud service customer has no other way but to wait for his lost data to be recovered by the cloud service provider when the data was lost or not accessible for a while due to the provider's system failure, cracking attempt, malfunction, or outage. We consider a solution to address this problem that can be implemented in the cloud client's domain, rather than in the cloud service provider's domain. We propose a high level architecture and scheme for successfully retrieving data units even when several cloud storages are not accessible at the same time. The scheme is based on a clever way of partitioning and partial overlapping of data for being stored on multiple cloud storages. In addition to providing a high level of data availability, the scheme makes it possible to re-encrypt data units with new keys in a user transparent way, and can produce the complete log of every user's data units accessed, for assessing data disclosure, if needed.