• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.10 no.12
• /
• pp.3668-3674
• /
• 2009

Use case diagram is used for defining inter-action between users and systems in object-oriented modeling. It is very important to defining users' requirements for efficient software development. In this paper, we propose a object-oriented modeling process using hierarchical use case analysis for designing class model. First, We define many use case diagrams by several hierarchical modeling level. And next, we can also design class model using the use case diagrams. Our proposed modeling process provides interaction between use case model and class model. That can make us to check the modeling process during the software development. Using the proposed object-oriented modeling we can develop software based on users' requirements. It is very useful for class modeling.

• The Journal of the Korea Contents Association
• /
• v.7 no.1
• /
• pp.215-224
• /
• 2007

The classification of the satellite images is basic part in Remote sensing. In classification of the satellite images, class separability feature is very effective accuracy of the images classified. For improving classification accuracy, It is necessary to study classification methode than analysis of class separability feature deciding classification probability. In this study, IKONOS, SPOT 5, Landsat TM, were resampled to sizes 1m grid. Above images were calculated the class separability prior to the step for classification of pixels. This Study concludes, each image was measured by the rate of class separability, values classified were showed highly about $1,600{\sim}2,000$.

• English Language & Literature Teaching
• /
• v.16 no.3
• /
• pp.339-363
• /
• 2010

The purpose of this paper is to investigate how the English classes in secondary schools in Korea are in terms of communicative nature. After literature study, COLT parts A and B were used to analyze three kinds of English classes: a common class type taught by a school teacher who had won 1st prize at TEE contest, a team teaching class taught by NNS and NS, and a model class taught by a pre-service English teacher. Their communicative English classes were videotaped and transcribed for analysis by COLT. The results of the study revealed that students participated in the classes mostly as a unit and, therefore, did not get many meaningful chances to speak English. Second, creative language-use opportunities were barely found during classes. Third, the group work seemed to be prepared before the class, not to be done during the class. Therefore it is likely to be learned from memorization rather than meaningful communication. These results suggest English classes in schools be more communicatively oriented for successful English learning. Further study should be conducted in order to make English classes more communicative to help students communicate their genuine messages in English and to help teachers teach English efficiently.

• Journal of Arbitration Studies
• /
• v.28 no.2
• /
• pp.91-110
• /
• 2018

Consumers repeatedly make small sum purchases through business-to-consumer contracts, usually without incident. Consumer areas have been increasing; therefore, consumer disputes have been occurring frequently as well. In international consumer transactions, it is not easy to solve consumer disputes by applying the laws of different countries. Resolving disputes by using the consumer arbitration system can be a measure to protect consumers. In the U.S., a class arbitration is being operated as a mixed dispute resolution system of class action and arbitration. Consumer Arbitration has long been a controversial issue in the U.S. It is therefore a lesson for us to examine related cases. A recent U.S. Supreme Court decision, DIRECTV v. Imburgia, was looked into and after a summary of the facts, issues, and opinions and opposing opinions that had a tight controversy, a close analysis was done. The analysis through this judgment is as follows: first, the contraction of consumer protection; second, the expansion of the Federal Arbitration Act scope; third, the class arbitration's restriction; and fourth, the submission of the arbitration fairness act.

• International Journal of Advanced Culture Technology
• /
• v.7 no.4
• /
• pp.49-55
• /
• 2019

In the age of information, newly produced knowledge is mostly written in English. Therefore, there has been a strong demand for English language learning in the EFL context. However, most EFL learners possess a lack of interest and motivation in the text-based reading class. In this educational context, film is one of the most widely used materials in English reading classes considering that modern learners are predominantly familiar with various audiovisual materials. The purpose of this study is to investigate how Korean EFL learners experienced in the film-based reading class. Specifically, this study aims to analyze the EFL students' perceptions about the class and learning strategies that they used during the class. In order to comprehensively interpret the EFL learners' experiences in the classroom, a coding system consisting of five categories was developed: report, emotion, reflection, evaluation, future plans. The results of data analysis showed that the use of movies in English reading classes had positive effects on reading comprehension and inference of word meaning. The most frequently used learning strategies were affective strategies which helped them control their emotion, attitude, motivations and values, whereas memorization strategies were rarely used. In this respect, this study suggests that the use of movies in the EFL reading classroom encourage students' attention and help them obtain and activate schema which is useful in gaining a better understanding of text-based reading materials.

• Earthquakes and Structures
• /
• v.13 no.1
• /
• pp.67-77
• /
• 2017

Oil storage tanks are vital life-line structures, suffered significant damages during past earthquakes. In this study, a numerical model for an unanchored vertical vaulted-type tank was established by ANSYS software, including the tank-liquid coupling, nonlinear uplift and slip effect between the tank bottom and foundation. Four actual earthquakes recorded at different soil sites were selected as input to study the dynamic characteristics of the tank by nonlinear time-history dynamic analysis, including the elephant-foot buckling, the liquid sloshing, the uplift and slip at the bottom. The results demonstrate that, obvious elephant-foot deformation and buckling failure occurred near the bottom of the tank wall under the seismic input of Class-I and Class-IV sites. The local buckling failure appeared at the location close to the elephant-foot because the axial compressive stress exceeded the allowable critical stress. Under the seismic input of Class-IV site, significant nonlinear uplift and slip occurred at the tank bottom. Large amplitude vertical sloshing with a long period occurred on the free surface of the liquid under the seismic wave record at Class-III site. The seismic properties of the storage tank were affected by site class and should be considered in the seismic design of large tanks. Effective measures should be taken to reduce the seismic response of storage tanks, and ensure the safety of tanks.

• Journal of the Korean Society of Safety
• /
• v.29 no.4
• /
• pp.54-60
• /
• 2014

This paper describes electric shock accidents on a 4.16 kV class circuit breaker for power plant. Electric shock accidents mostly involve damage of human life, in comparison with electrical fire, rate of human death tend to be higher in electric shock accidents. Specially, in a high voltage facilities rate of human death comprised about 43.7% by electric shock accidents. If electric shock accidents happen in a 4.16 kV class circuit breaker for power plant, then the power plant discontinue power production. Electric shock accidents in a power plant have a great ripple effect such as an electric power shortage. In this paper, we analyzed electric shock accidents on a 4.16 kV class circuit breaker for power plant. From the analysis results, we confirmed a cause of electric shock accidents on a 4.16 kV class circuit breaker, it happened by defect of interlock equipment or occurrence of breakdown between first feeder contactor and shielding plate. In order to reduce electric shock accidents on a 4.16 kV class circuit breaker, the power plant should consider improvement of interlock equipment and insulation of feeder contactor in circuit breaker.

• International Journal of Internet, Broadcasting and Communication
• /
• v.15 no.4
• /
• pp.304-310
• /
• 2023

With the development of information and communication technology, modern people are receiving various benefits, and knowledge and use of information and communication technology are becoming essential qualities in modern people's lives. There are people who do not enjoy the rich benefits of this information and communication society, and the so-called 'digital divide' acts as an obstacle that prevents the information and communication from enjoying a rich life. Currently, there are four major information underprivileged classes in Korea, the disabled, the elderly, low-income class and farmers and fishermen, respectively. The purpose of this study is to identify the current status of the digital divide for the low-income class and to analyze the causes of the digital divide. To this end, in this study, we analyze statistics on digital divide at the national level and analyzed the digital divide of low-income class from three perspectives: information access, information capability, and information use. As a result of the analysis, it was found that the lack of information capability was the biggest cause of the digital divide, and in particular, information management ability was the most insufficient among information capabilities.

• Communications of Mathematical Education
• /
• v.34 no.4
• /
• pp.485-506
• /
• 2020

The purpose of this study is to analyze of the effect in Mathematics Teachers beliefs on their students beliefs by Latent Class Regression Model (LCRM). For this analysis, the study used the findings and surveys of Kang, Hong (2020) who developed a belief profile by analyzing the mathematical beliefs of 60 high school teachers and 1,850 second-year high school students learning from them through the Latent Class Analysis (LCA). As a result It was observed that 'Nature of Mathematics', 'Mathematic Teaching' and 'Mathematical Ability' of mathematics teachers beliefs influence the mathematical beliefs of students. The teacher's belief of 'Nature of Mathematics' statistically significant effects on students' beliefs in 'School Mathematics', 'Problem Solving', 'Mathematics Learning'. The teacher's belief of 'Teaching Mathematics', 'Mathematical Ability' statistically significant effects on students' beliefs in 'School Mathematics', 'Problem Solving', 'Self-Concept'. The results of this study can give a preview of the phenomenon in which teacher's mathematical beliefs are reproduced into student's mathematical beliefs. In addition, the results of observation of this study can be used to the contents that can achieve the purpose of reorientation for mathematics teachers.

• Journal of Digital Convergence
• /
• v.19 no.8
• /
• pp.397-404
• /
• 2021

The aim of this study is to explore the educational experience of nursing students after designing an action learning class suitable for basic nursing science class and applying it. A total 100 freshmen nursing students taking a basic nursing science class of K university in S city participated in this study. Data was collected from May 2019 to June 2020. The action learning class consisted of 5-6 people per team, a total of 9 teams, reflection diaries were collected and analyzed using the qualitative content analysis method of Krippendorff (2004). The analysis produced 45 significant statements in total, 8 themes and 4 categries for the experience of basic nursing science class based on action learning. The 4 categories were 'confidence in anatomy', 'growing teamwork', 'learned how to study', 'difficulties in the process'. The action learning applied class was found to be effective in problem-solving ability, teamwork, and self-directed learning. Therefore, it is proposed to evaluate the effect of action learning in other nursing subjects as well.