• Journal of the Korean Institute of Landscape Architecture
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• v.27 no.5
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• pp.138-149
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• 2000

The purpose of this study is to evaluate Suwon stream naturalness Index(S.N.I). and tofind out stats, problems and opportunities of the Suwon stream by assessment standard. Assessment standard is mainly based on physical structure of stream environment. the purpose evaluating sectors and elements are physical form and structure restoration of stream. To find out assessment standard of stream naturalness index, conceptual frame of assessment standard has been established, for which four sections, for example, longitudinal section, lateral section, stream bottom structure and water environment, have been selected. Overall stream naturalness index of the Suwon stream has been distributed at 3rd to 4th grade, and 3.3 of assessment index and mode were 3rd grade respectively. stream naturalness index of each section was as follows: Longitudinal section accounted for 3.7in average to be 4th grade, lateral section did 3.8 to be 4th grade, and water environment did 2.4 to be 2nd grade. Analysis of assessment outcome of stream naturalness index has checked status, problems and opportunities of corresponding stream. Assessment of stream naturalness index of the study provides useful information for restoration of close-to-nature stream, and furthermore has its meaning in checking problems and opportunities of Suwon stream.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.19 no.1
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• pp.88-93
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• 2011

In order to ensure the safety, regularity and efficiency of air transportation, ICAO has established the international standards for air navigation systems since 1940s. In 1991, ICAO announced the concept of New CNS/ATM systems and recommended States to carry out the development of the sub systems as well as propose the standards due to many problems caused by service limitations and considerable errors from the conventional systems. As a result, international standards for 21 systems have been established. However, many problems have also been raised. In this paper the problems on new international standard establishment are analyzed and the measures to cure them are suggested.

• Research in Mathematical Education
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• v.17 no.3
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• pp.169-180
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• 2013

Communicating about mathematics is an essential component in learning mathematics and is a key standard for successful learning in a mathematics classroom using stories and storytelling as a catalyst to mathematics instruction. This, however, can make learning math for students with language deficiencies since they are working toward mastering both basic language proficiency as well as the specialized language needed for mathematics. This is a particular concern because the number of students of multicultural families is rapidly increasing. In this paper, we discuss the challenges and complexities of language-deficient students learning math in a classroom where communication is a key standard for successful learning, and suggest implications for teaching, by presenting an USA elementrny teacher's scaffolding to make reading and solving word problems less intimidating for her language learner students as well as native speaking students.

• Journal of applied mathematics & informatics
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• v.42 no.2
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• pp.321-331
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• 2024

We consider the numerical treatment of blow-up problems having non-monotonic singular solutions that tend to infinity at some point in the domain. The use of standard numerical methods for solving problems with blow-up solutions can lead to significant errors. The reason being that solutions of such problems have singularities whose positions are unknown in advance. To be able to integrate such non-monotonic blow-up problems, we describe and use a method of non-local transformations. To show the efficiency of the method, we present a comparison of exact and numerical solutions in addition to some comparison with the work of other authors.

• Proceedings of the KIEE Conference
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• 2001.07a
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• pp.308-310
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• 2001

With the development of Computer & Communication Technology, nowadays many people are interested in remote metering, and many vendors are suggesting various remote metering solutions. KEPCO (Korea Electric Power Corporation) adopts some of these to some customers who uses a lot of electric power, also continues researching them. But, currently used electronic watt-hour meters vary in terms of communication protocol and data structure by the vendors. So we have to know each vendor's communication protocol and data structure to construct a remote metering system, or to find problems in it. But that's impossible to know each vendor's protocol and data structure because they are reluctant to tell those to outside the company. To solve these problems and to make a much more cost-effective metering system, KEPCO developed standard communication protocol between meters and PC (or metering server), and defined standard functions and data structure which can be used by everyone easily. Those developments support standard interface for every vendors' meters. And Those will be adopted by KEPCO for a part of a new metering standard for electronic watt-hour meters.

• Korean Journal of Social Welfare
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• v.62 no.4
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• pp.377-402
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• 2010

This study examines the effects and process of housing poverty on children's physical health, internalizing problems and academic achievement using the first Korea Welfare Panel Study. The results show that sub-minimum standard housing condition and housing expenditures have increased the housing instability, non-study activities, while harming parent's health and decreasing non-housing expenditures. And this process negatively affects children's internalizing problems and academic achievement. The findings of this study have value for controlling the confounding factors as income poverty, neighborhood poverty and characters of household. This research is significant in that it develops the theoretical model of housing poverty and suggests the necessity of interventions to alleviate housing poverty.

• Research in Community and Public Health Nursing
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• v.23 no.4
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• pp.366-375
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• 2012

Purpose: The purpose of this study was to identify predictors of drinking problems in Korean international students in the United States. Methods: The subjects involved this study were 190 Korean international students in the United States. Data were measured using a drinking problems questionnaire, an acculturative stress scale for international student, and the CES-D. The collected data were analyzed using the SPSS/WIN 17.0 program to calculate mean, standard deviation, ANOVA, Sheff$\acute{e}$ test and pearson's correlation coefficient. and stepwise multiple regression. Results: 1) The mean score of the degree of perceived acculturative stress was $2.15{\pm}0.63$, of depression was $17.67{\pm}9.85$, and of drinking problems was $15.03{\pm}15.52.2$) There were significant correlations between acculturative stress and drinking problems (r=.506, p<.001), between depression and drinking problems (r=.6726, p<.001), and between acculturative stress and depression (r=.453, p<.001). 3) In stepwise multiple regression analysis the most powerful predictor of drinking problems were acculturative stress (${\beta}$=.243, p<.001), and depression (${\beta}$=.562, p<.001). Conclusion: Based on the results, practical implications for reducing the acculturative stress and improving the psychological well-being of Korean students were discussed.

• Research in Mathematical Education
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• v.9 no.4 s.24
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• pp.335-340
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• 2005

According to the mathematics educational practice and research about gifted children in some secondary schools in China, the paper presented some relevant problems: 1. Missing or mistaken selecting in gifted children in China. It included the limitations of identifying standard and the fault of understanding and doing in practice, administration disturbance and emotional inclination. 2. Backward traditional mathematics teaching in gifted children in China. It included lower teaching starting point, slower teaching planned speed, simpler teaching contents and so on. The paper analyzed the problems, and made enlightenment for gifted children's mathematical teaching strategies: raising starting point of contents; emphasizing essential principles and skills; using flexible teaching methods; encouraging discover and creativity and developing harmoniously psychological level and mathematical ability. As to these strategies, some detail measures were offered as well.

• Journal of Families and Better Life
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• v.20 no.2
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• pp.9-20
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• 2002

This study examined different individual and environmental factors that affect children's experience of harassment from their peers. For the individual variables, gender, behavioral problems, and self-esteem were included in the anal)'sis. For the family variables, mother's parenting style and the socio-economic status of parents were examined, and for the school variables, the supervision of the teacher and the attitudes of the classmates toward bullying were used. Two forms of peer harassment, the overt form and the relational form were examined in this study. The sample consisted of 520 fifth grade children. Statistics and methods used for the data analysis were Cronbach's alpha, factor analysis, frequency, percentage, means, standard deviation, Pearson's correlation, and multiple regression. Several major relationships were found from the analyses. First, the more the children tend to internalize behavioral problems and have lower self-esteem, the more likely they are to get victimized by overt and relational forms of harassment. Boys experience more overt harassment than girls. Second, the more the mother's parenting style is permissive-nonintervening, or rejecting-restricting, and the higher the father's social status is, the more likely the child is subjected to overt and relational forms of harassment. Third, the more the children feel that the teacher is paying attention to bullying, the less the children are subjected to the overt form of peer harassment. Fourth, children's internalizing behavioral problems, mother's permissiveness-nonintervention, children's self-esteem, children's gender, and the supervision of the teacher regarding bullying significantly affected the experience of overt forms of harassment. A twenty two percent variance in the victimization of an overt form was explained by those variables. Children's internalizing behavioral problems, mother's permissiveness-nonintervention, children's self-esteem, and mother's rejection-restriction significantly affected the experience of relational form of peers harassment. Twenty six percent of the variance in the relational form of victimization was explained by those variables.

• Journal of the Korea Society of Computer and Information
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• v.16 no.11
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• pp.163-171
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• 2011

Because RFID systems use radio frequency, they have many security problems such as eavesdropping, location tracking, spoofing attack and replay attack. So, many mutual authentication protocols and cryptography methods for RFID systems have been proposed in order to solve security problems, but previous proposed protocols using AES(Advanced Encryption Standard) have fixed key problem and security problems. In this paper, we analyze security of proposed protocols and propose our protocol using OTP(One-Time Pad) and AES to solve security problems and to reduce hardware overhead and operation. Our protocol encrypts data transferred between RFID reader and tag, and accomplishes mutual authentication by one time random number to generate in RFID reader. In addition, this paper presents that our protocol has higher security and efficiency in computation volume and process than researched protocols and S.Oh's Protocol. Therefore, our protocol is secure against various attacks and suitable for lightweight RFID tag system.