• Annual Conference on Human and Language Technology
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• 1996.10a
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• pp.128-141
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• 1996

한국어-영어 이중언어자와 비이중언어자인 한국 대학생들을 대상으로 두 언어 처리의 독립성과 영어 처리의 사고 억제 과정을 알아보기 위해서 두 개의 산출실험을 실시하였다. 실험 1에서는 한국어와 영어로 산출 과제를 준 후에 한국어, 영어 단어에 대한 어휘 판단 과제를 하였다. 이중언어자는 한국어-영어 처리 체계가 분리되어 있어서 산출 언어와 목표 단어의 언어가 바뀐 경우에 단어 판단시간이 더 길 것으로 예상하였으나 유의미한 결과는 나오지 않았다. 비이중언어자는 영어 산출 후에 한국어, 영어 단어에 대한 판단 시간이 모두 느려졌으며 이것은 영어 산출에 많은 심적 자원을 소모하였기 때문이라고 해석하였다. 실험2에서는 영어로만 1분간 산출 과제를 주고 20초씩 나눈 세 구간에서 발화된 단어 수를 측정하였다. 이중언어자는 세 번째 구간에서 유의미하게 발화된 단어수가 감소하였지만 비이중언어자는 세 구간에서 발화된 단어수가 비슷하였다. 이것을 영어 산출시의 처리 부담과 관련하여 논하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2004.05a
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• pp.285-288
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• 2004

분석 및 설계단계의 산출물을 작성할 때는 대부분 정형화와 표준화를 따른다. 그러나 실제 시스템 개발현장에서는 단계별 산출물들의 개별적인 특성으로 인하여 모든 산출물간에는 연속적이며 자동화된 과정을 통해 산출물들이 작성될 수는 없다. 그 결과 작성된 개발 산출물간의 일관성이 유지되지 못하는 관계로 최종 산출물에서 여러 가지 문제가 야기됨을 알 수 있다. 그러므로 본 논문에서는 객체지향 방법론에 따라 개발되는 시스템에 대해 분석 및 설계단계의 산출물간 일관성을 유지하기 위한 방안을 제시하고, 이를 지원하기 위한 도구를 개발한다.

• Korean Journal of Remote Sensing
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• v.24 no.4
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• pp.309-324
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• 2008

In this study the retrieval algorithms have been developed to retrieve total precipitable water (TPW) from Terra/Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) infrared measurements using a physical iterative retrieval method and a split-window technique over East Asia. Retrieved results from these algorithms were validated against Defense Meteorological Satellite Program (DMSP) Special Sensor Microwave/Imager (SSM/I) over ocean and radiosonde observation over land and were analyzed for investigating the key factors affecting the accuracy of results and physical processes of retrieval methods. Atmospheric profiles from Regional Data Assimilation and Prediction System (RDAPS), which produces analysis and prediction field of atmospheric variables over East Asia, were used as first-guess profiles for the physical retrieval algorithm. We used RTTOV-7 radiative transfer model to calculate the upwelling radiance at the top of the atmosphere. For the split-window technique, regression coefficients were obtained by relating the calculated brightness temperature to the paired radiosonde-estimated TPW. Physically retrieved TPWs were validated against SSM/I and radiosonde observations for 14 cases in August and December 2004 and results showed that the physical method improves the accuracy of TPW with smaller bias in comparison to TPWs of RDAPS data, MODIS products, and TPWs from split-window technique. Although physical iterative retrieval can reduce the bias of first-guess profiles and bring in more accurate TPWs, the retrieved results show the dependency upon initial guess fields. It is thought that the dependency is due to the fact that the water vapor absorption channels used in this study may not reflect moisture features in particular near surface.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04b
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• pp.364-366
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• 2004

소프트웨어 개발 과정의 여러 산출물 간의 일관성 유지는 최종 소프트웨어의 품질을 결정하는 중요한 요소가 되며, 운영단계의 유지보수 효율성에도 큰 영향을 미친다. 특히 구현 등 개발 후반부 활동을 진행시 발견된 하나의 오류는 그 이전 단계의 다수의 산출물의 오류로 인한 파급 결과이므로, 발견된 오류의 원인(Cause)가 되는 이전 단계의 오류를 효과적으로 추적할 수 있는 체계가 요구된다. 본 논문에서는 한 산출물의 오류가 다른 어떤 산출물의 어떤 세부항목들의 어떤 오류로 인한 파급 결과인지를 정의한 역추적(Backtracking) 그래프를 제안하여, 개발자가 오류를 발견 시 관련 산출물과 항목을 신속히 파악할 수 있도록 한다. 이를 이용하여 산출물간의 일관성 유지 노력과 시간을 최소화하고 일관성 유지의 정확성을 높일 수 있다.

• Journal of the KSME
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• v.34 no.7
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• pp.510-516
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• 1994

탄성파의 속도는 파동 전파 매질의 밀도와 탄선계수에 달려 있으므로, 박막이 입혀진 기판에서 전파하는 표면파에 대해서 기판과 박막의 밀도와 탄성계수 및 박막의 두께 등을 알면 전파 속 도를 계산할 수 있다. 박막의 탄성계수를 모르는 경우에는 표면파 속도를 측정하여 역으로 탄 성계수를 산출할 수 있다. 이러한 역산과정에는 일반적인 비선형 방정식의 curve-fitting에 이용될 수 있는 simplex법이 효율적으로 활용된다. 이 글에서는 표면파 속도를 측정하고 그 데이터로 부터 역산하여 박막의 탄성계수를 구하는 원리와 과정을 설명한다.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2003.09a
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• pp.570-573
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• 2003

광산개발로 인한 지하수 유동체계 변형에 따른 주변환경 영향조사의 과정으로 충북 음성군 지역에서 야외 조사를 실시하였다. 조사 과정중 연구지역의 지하수계를 이해하고 개발에 따른 지하수 유동체계 변화를 예측하고자 수행된 모델링의 입력인자 산정을 위해 순간충격시험을 실시하였다. 순간충격시험을 통해 수리전도도, 투수량계수 그리고 저류계수를 산출하였다. 그리고 dummy의 주입과 회수시 다르게 나타나는 수리전도도값의 원인에 대해서도 고찰해 보았다.

• Korean Journal of Comparative Education
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• v.28 no.4
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• pp.221-248
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• 2018

The purpose of this study was to analyze the performance of the Daegu Happiness Competency Education Program. It was confirmed that students, parents, teachers, and education professions are aware of the middle and higher level of education for happiness in Daegu in terms of the formation and operation of the curriculum. There is no significant difference between students and parents in terms of average value, and teachers' perception level is relatively high, which is understandable in that teachers are the subjects of the curriculum organization and operation. In addition, there was no statistically significant difference between the parents and the school level, but there were significant differences between students and teachers. In particular, students' and teachers' perceptions were lowered as the number of schools increased, unlike the predictions. They showed the lowest results in the special schools, autonomous schools and special schools. The reason for this is that Daegu Happiness Competency Education was implemented in 2014, and it was because there was little room to recognize and accept the new curriculum due to the burden of college entrance examination or employment. In the future, it will naturally improve as the education process is settled, but here we can find suggestions for the establishment of Daegu Happiness Competency Education.

• Journal of Digital Convergence
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• v.10 no.4
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• pp.181-190
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• 2012

Cost of capital is one of the key factors of accounting regulation policy for telecommunication market. This paper aims at investigating efficient policy improvements concerning accounting regulation for telecommunication market focused on cost of capital calculation methods and its application. At First, cost of capital estimating method should be improved. In estimating the cost of equity capital, it is necessary to use benchmark method for Equity risk premium. It will reduce analytical errors caused by a rapid economic change and inflation. It is also more desirable to use debt premium adding method for the cost of debt capital. Optimal capital structure method may be considered a better way to estimates capital structure. Secondly, cost of capital estimating process also has to be reformed. Telecommunication industry changes rapidly so it does not reflect fast environmental changes. Therefore, cost of capital should be calculated every year. Cost of capital should be calculated by individual companies. There is information asymmetry between regulators and regulatees. Because of that cost of capital calculating process takes long time and cost a lot. To solve this problem, regulator should legislate on cost of capital calculation and then regulating companies report the calculating result. Lastly, major telecommunication companies are all listed now and it is possible to calculating it separately. We must continuously improve the estimating method and application of cost of capital and due to the fast growing of telecommunication industry. The process of determining the calculating method must be discussed and best method chosen.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.31 no.1
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• pp.23-28
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• 2013

The process of a feature matching for two different spatial data sets is similar to the process of classification as a binary class such as matching or non-matching. In this paper, we calculated a threshold by applying an equal error rate (EER) which is widely used in biometrics that classification is a main topic into spatial data sets. In a process of discriminating what's a matching or what's not, a precision and a recall is changed and a trade-off appears between these indexes because the number of matching pairs is changed when a threshold is changed progressively. This trade-off point is EER, that is, threshold. To the result of applying this method into training data, a threshold is estimated at 0.802 of a value of shape similarity. By applying the estimated threshold into test data, F-measure that is a evaluation index of matching method is highly value, 0.940. Therefore we confirmed that an accurate threshold is calculated by EER without person intervention and this is appropriate to matching different spatial data sets.

• The Journal of the Korea Contents Association
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• v.14 no.5
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• pp.487-497
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• 2014

The purpose of this study is to investigate the efficacy of interaction using Wiki in communication-oriented classes taught by native teachers on the incidental improvement of productive vocabulary knowledge. Eighty two university freshmen participated in the study and they were divided into two groups. Thirty eight students(Process Group) received process feedback from the teacher while forty four students(Result Group) received result feedback. They were given a short movie project working in a group of four or five people to practice interaction between peers and between students and the teacher. Data were collected from one receptive and three productive vocabulary knowledge test scores. The results showed that interaction using Wiki was conducive to the growth of productive vocabulary knowledge incidentally due to continuous opportunities to use vocabulary. The students of process feedback group made greater gains of productive vocabulary than those of result feedback group. Based on these results, pedagogical implications are discussed.