• The Journal of Korea Institute of Information, Electronics, and Communication Technology
• /
• v.11 no.4
• /
• pp.436-444
• /
• 2018

Currently, the new substation automation uses the international standard IEC 61850 communication protocol. KEPCO is also constructing a new substation based on IEC 61850 from 2013 through the pilot application and research and development starting from 2007. However, there are few cases where existing substations(Transformer, T/L GIS, D/L GIS, etc.) have been used, and RTU based substations operating systems have been changed to SA substations based on IEC 61850. Therefore, the introduction of IEC 61850 in existing substation facilities has the advantage of enhancing the substantiality of the substation by reusing existing facilities, improving the interoperability with the latest substations introduced, and converting existing substations into systems suitable for unmanned operation. In this paper, we introduce a case of changing the existing RTU based substation operation system to digital substation using IEC 61850 field information processor, Ethernet switch and SA operation system. Also, IEC 61850 client authentication program and Wireshark, which is a packet analysis tool, verify IEC 61850 conformance and its feasibility.

• Asian Pacific Journal of Cancer Prevention
• /
• v.16 no.1
• /
• pp.1-8
• /
• 2015

The Japan National Committee for the Union for International Cancer Control (UICC) and UICC-Asia Regional Office (ARO) organized a Roundtable Discussion as part of the official program of the UICC World Cancer Congress 2014 in Melbourne, Australia. The theme for the Roundtable Discussion was "Looking Toward the Realization of Universal Health Care 'UHC' for Cancer in Asia" and it was held on December 5, 2014. The meeting was held based on the recognition that although each country may take a different path towards the realization of UHC, one point that is common to all is that cancer is projected to be the most difficult disease to address under the goals of UHC and that there is, therefore, an urgent and pressing need to come to a common understanding and awareness with regard to UHC concepts that are a priority component of a post-MDG development agenda. The presenters and participants addressed the issue of UHC for cancer in Asia from their various perspectives in academia and international organizations. Discussions covered the challenges to UHC in Asia, collaborative approaches by international organizations, the need for uniform and relevant data, ways to create an Asia Cancer Barometer that could be applied to all countries in Asia. The session concluded with the recognition that research on UHC in Asia should continue to be used as a tool for cancer cooperation in Asia and that the achievement of UHC would require research and input not only from the medical community, but from a broad sector of society in a multidisciplinary approach. Discussions on this issue will continue towards the Asia-Pacific Cancer Conference in Indonesia in August 2015.

• The Journal of the Korea Contents Association
• /
• v.10 no.3
• /
• pp.423-435
• /
• 2010

The number of professionals in the science and engineering fields decreases all over the world. Especially in Korea, the declining rate of both the laborable and economically active population, aging of the population at the fastest level, and the declining birth rate make it tougher to secure the core brains of the future. After speculation of all programs above, some common factors have been derived and every program appeared to have the support for each level of inducing, caring, and utilizing. And the means of support could be categorized into the financial, legal, and social aspects. Lastly, a logical tool called Systems Thinking has been applied to the FLS Conditions and the Brain Internalization Process to assure the efficacy and applicability of the models. This is to minimize any de facto side effects by analyzing all 'feedback loops' stemming from the models. And the 'causal loop diagrams' have been utilized to come with the complementary measures. Such series of verification could convince the virtue of the models. Governments and universities can make use of the FLS Conditions and the Brain Internalization Process so the policies or plans about the foreign brains can be built in a uniformized and consistent framework. I hope, as a result, the international competency of Korea to induce and utilize the foreign brains be raised with the constant and standardized formality.

• The Journal of the Korea Contents Association
• /
• v.13 no.11
• /
• pp.1004-1013
• /
• 2013

The purpose of this study was to investigate the effect of education of natural disaster on eco-friendly attitude of children in integrated class in the lower grades in elementary school. For the above mentioned purpose, 2 children with developmental delay and 45 general children enrolled in two integrated classes in the first grade in C Elementary School located in G City. The class that wanted to participate in this program was designated as an experimental group and the other class as a comparative group. Total 18 times of session of experimental treatment were performed during the second semester of the first grade. The effect of education of natural disaster was measured by using the tool revised and adapted by Heoh, Yun Jeong on the basis of CATES-PV designed by Musser and Diamond. As results, it was appeared that education of natural disaster was effective to increase eco-friendly attitude of children in integrated class in the lower grades in elementary school. The results that ability and attitude which were goals of the current education related to environment such as love and concern for animals and plants, life respect consciousness, preference for natural environment rather than artificial environment, conservation of nature and resources saving etc of children who received education of natural disaster suggest necessity to rethink the meaning and scope about education of natural disaster for Korean children in the preset.

• Journal of KIISE:Software and Applications
• /
• v.37 no.12
• /
• pp.882-891
• /
• 2010

Many automated dynamic test data generation technique have been proposed. The techniques evaluate fitness of test data through executing instrumented Software Under Test (SUT) and then generate new test data based on evaluated fitness values and optimization algorithms. Previous researches and experiments have been showed that these techniques generate effective test data. However, optimization algorithms in these techniques incur much time to generate test data, which results in huge test case generation cost. In this paper, we propose a technique for reducing the time of evaluating a fitness of test data among steps of dynamic test data generation methods. We introduce the concept of Fitness Evaluation Program (FEP), derived from a path constraint of SUT. We suggest a test data generation method based on FEP and implement a test generation tool, named ConGA. We also apply ConGA to generate test cases for C programs, and evaluate efficiency of the FEP-based test case generation technique. The experiments show that the proposed technique reduces 20% of test data generation time on average.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2011.05a
• /
• pp.48-48
• /
• 2011

본 연구에서는 미래 기후변화가 하천 및 호소수질에 미치는 영향을 평가하고자 유역 수문-수질 모의가 가능한 SWAT(Soil and water assessment tool) 모형과 호소수질 모의가 가능한 WASP(Water Quality Simulation Program) 모형을 연계운영하여 충주호를 포함하는 충주댐 유역($6,642.0km^2$)에 적용하였다. 이를 위해 IPCC(Intergovernmental panel on climate change)에서 제공하는 A1B 배출시나리오를 포함하는 MIROC3.2 hires 모형의 결과로부터 충주댐 유역의 총 6개 기상관측소에 대한 과거 30년(1997~2006) 실측자료를 바탕으로 미래 온도와 강수에 대한 편이보정(Bias correction) 및 Change Factor Method로 상세화(Downscaling)하여 미래 기후자료(2020s, 2050s, 2080s)를 생산하였다. 미래 연평균 온도는 기준년도인 2000년에 비해 최대 $+4.8^{\circ}C$(2080s)의 온도증가를 보였으며, 강수량의 경우 여름과 가을 강수량이 다소 감소하였으나 연평균 강수량은 최대 +34.4%(2080s) 증가하는 것으로 전망되었다. 먼저, SWAT 모형을 이용한 기후변화에 따른 댐 유입량은 39.8%(2080s) 증가는 것으로 분석되었으며 유역의 유출특성 변화로 인한 유사량은 지표유출변화에 기인하여 봄과 겨울에 증가하는 경향과 함께 -14.5%(2020s) ~ +27.3%(2080s)의 변화를 보이는 것으로 분석되었다. 영양물질에 대한 오염부하량은 2080s에서 T-N이 증가추세를 보이며 최대 87.3% 까지 증가하는 반면, T-P는 유사량과 유사한 변화패턴을 보이며 최대 48.4%까지 감소하는 것으로 분석되었다. 호소수질 모델링을 위한 충주호의 Segment 구성은 충주댐1 지점에서부터 충주댐4 지점까지 전체 수표면적 $65.7km^2$에 대하여 상층과 하층 총 760개로 구성하였으며, SWAT 모형에 의한 충주호 유입하천 소유역에서의 미래 유출 및 영양물질 자료를 WASP 모형의 초기값으로 입력하여 수체 내의 BOD, Chl-a, T-N, T-P 변화 분석을 실시하였다. 이와 같이 지구 온난화에 의한 기후변화는 강우특성 변화에 따른 가뭄과 홍수 등 극한 기상현상의 발생, 유역 물순환 체계 변화를 야기 시키므로서 수자원 부존량 변화에 영향을 미칠 뿐만 아니라 기온상승에 따른 수온변화, 비점오염물질의 거동에도 변화를 초래하여 하천 및 호소 수질에 큰 영향을 미칠 것으로 판단된다.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2011.05a
• /
• pp.29-29
• /
• 2011

SWAT (Soil and Water Assessment Tool) 모형은 물리적 기반의 준분포형 강우-유출 모형으로서, 대규모의 복잡한 유역에서 장기간에 걸친 다양한 종류의 토양과 토지이용 및 토지관리 상태에 따른 유출과 유사 및 오염물질의 거동에 대한 토지관리 방법의 영향을 예측이 가능하여, 수자원 관리 계획 및 유역관리를 위한 의사결정 지원 등 그 적용 범위가 매우 광범위하다. 이러한 모형의 적용성 검증을 위해서는 매개변수 민감도 분석 및 검 보정, 예측 불확실성 분석을 필요로 한다. 최근 수문 모델의 불확실성을 분석하기 위한 다양한 기법들이 개발 되었는데, 본 연구는 충주댐 유역(6,581.1 m)을 대상으로 유역출구점의 실측 일 유출량 자료(1998~2003)를 바탕으로 SWAT 모형의 유출관련 매개변수(총 18개)에 대한 불확실성 분석을 실시하였다. 이때 사용된 분석 기법으로는 SUFI2 (Sequential Uncertainty FItting algorithm 2), GLUE (Generalized Likelihood Uncertainty Estimation), ParaSol (Parameter Solution)등을 적용 하였다. 이러한 기법은 모두 SWAT-CUP (SWAT-Calibration Uncertainty Program, Abbaspour, 2007) 모형에 탑재되어있으며, 모형의 결과로써 검 보정, 매개변수의 민감도 분석, 각종 목적 함수 및 불확실성의 범위 등이 자동으로 산출 되므로 모형의 사용자가 불확실성 평가 기법의 분석 및 비교를 손쉽게 할 수 있다. 그 결과 대표적인 목적 함수인 결정 계수( $^2$)와 NSE (Nash-Sutcliffe Model Efficiency)는 모두 0.65에서 0.92사이의 값을 나타내어 대체적으로 모의가 잘 이루어졌음을 알 수 있었다. 그러나 불확실성의 범위를 나타내는 지표인 p-factor 및 r-factor에서는 평가 기법 별로 그 차이가 확연하게 드러났다. 여기서 p-factor는 불확실성 범위에 실측치가 포함되는 비율이며, r-factor는 불확실성의 상대적인 범위로 각각 1과 0에 가까울수록 모의 기법의 성능이 우수함을 의미한다. 세 가지 알고리듬 중에서 SUFI2의 p-factor가 약 0.51로 가장 높게 나타났으며, ParaSol의 r-factor가 0.00으로 가장 작게 나타났다. 여기서 p-factor는 불확실성 범위에 실측치가 포함되는 비율이며, r-factor는 불확실성의 상대적인 범위를 의미한다. 본 연구의 결과는 SWAT 모형을 이용한 수문모델링에서 수문분석에 따른 예측결과의 불확실성을 정량적으로 평가함으로서, 모형의 적용성 평가 및 모의결과의 신뢰성 확보에 근거자료로 활용이 가능할 것으로 판단된다.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.35 no.2C
• /
• pp.182-192
• /
• 2010

This paper proposes the hardware IP design of JBIG2 encoder. In order to facilitate the next generation FAX after the standardization of JBIG2, major modules of JBIG2 encoder are designed and implemented, such as symbol extraction module, Huffman coder, MMR coder, and MQ coder. ImpulseC Codeveloper and Xilinx ISE/EDK program are used for the synthesis of VHDL code. To minimize the memory usage, 128 lines of input image are processed succesively instead of total image. The synthesized IPs are downloaded to Virtex-4 FX60 FPGA on ML410 development board. The four synthesized IPs utilize 36.7% of total slice of FPGA. Using Active-HDL tool, the generated IPs were verified showing normal operation. Compared with the software operation using microblaze cpu on ML410 board, the synthesized IPs are better in operation time. The improvement ratio of operation time between the synthesized IP and software is 17 times in case of symbol extraction IP, and 10 times in Huffman coder IP. MMR coder IP shows 6 times faster and MQ coder IP shows 2.2 times faster than software only operation. The synthesized H/W IP and S/W module cooperated to succeed in compressing the CCITT standard document.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.20 no.12
• /
• pp.563-573
• /
• 2019

The purpose of this study is to confirm whether the parenting stress of mothers with preschool children mediated the parent-child interaction and parenting attitude on children's learning readiness. Data was used from the 5th (2012) to 7th (2014) Korean Children's Panel, and a total of 1,480 data sets were used for the analysis. The age of study participants was five years old. The Amos 23.0 program was used as an analytical tool, and the structural equation model analysis was applied to estimate the path coefficient corresponding to the research question. First, it was expected that mothers' parenting stress negatively affected the parent-child interaction, mother's parenting attitude, and children's readiness. Second, it was assumed that parent-child interaction and the mother's warm parenting attitude were positively significant to children's readiness. Third, the relationship between the parenting stress of mothers and children's learning readiness was partially mediated by a positive parenting attitude. The current study supplies valuable data to establish the educational support and efficiency strategy for domestic children. This study is meaningful in that it provides basic data in preparing a plan to more effectively provide educational support for domestic children.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.18 no.12
• /
• pp.189-199
• /
• 2017

This study investigated the effects of life stress, cultural adaptation stress, and academic satisfaction amongst a total of 283 20's Chinese students majoring in cosmetology at colleges in Seoul. For this, data was collected from February to March 2017. The frequency analysis was conducted to verity the general characteristic of Chinese student studying in Korea who are study objects while utilizing SPSS Statistics V22.0 for data processing and analysis while the factor analysis and reliability analysis were conducted to investigate the validity of measurement tool and evaluate the reliability. Moreover, the regression analysis between variables and regression analysis were utilized. The results found the following: First, in terms of life stress, as peer relationship, appearance stress, economic stress, family relationship stress and academic stresses decreased, their academic satisfaction increased. Second, regarding cultural adaptation stress, as interpersonal and living culture stresses were lowered, academic satisfaction increased. Therefore, this study targets to derive implications on an efficient plan to improve the academic satisfaction of Chinese students studying in the Republic of Korea by developing and providing a proper academic program with a decent support system in terms of culture, life, and education after investigating their life and cultural adaptation stresses.