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      • KCI등재
      • KCI등재

        Some applications for the difference of two CDFs

        홍종선,손윤환 한국데이터정보과학회 2014 한국데이터정보과학회지 Vol.25 No.1

        It is known that the difference in the length between two location parameters of two random variables is equivalent to the difference in the area between two cumulative distribution functions. In this paper, we suggest two applications by using the difference of distribution functions. The first is that the difference of expectations of a certain function of two continuous random variables such as the differences of two k th momentsand two moment generating functions could be dened by using the difference between two univariate distribution functions. The other is that the difference in the volume between two empirical bivariate distribution functions is derived. If their covarianceis estimated to be zero, the difference in the volume between two empirical bivariate distribution functions could be defined as the difference in two certain areas.

      • KCI등재

        Alternative accuracy for multiple ROC analysis

        홍종선,Zhi Qiang Wu 한국데이터정보과학회 2014 한국데이터정보과학회지 Vol.25 No.6

        The ROC analysis is considered for multiple class diagnosis. There exist many criteria to find optimal thresholds and measure the accuracy of diagnostic tests for k dimensional ROC analysis. In this paper, we proposed a diagnostic accuracy measure called the correct classification simple rate, which is defined as the summation of true rates for each classification distribution and expressed as a function of summation of sequential true rates for two consecutive distributions. This measure does not weight accuracy across categories by the category prevalence and is comparable across populations for multiple class diagnosis. It is found that this accuracy measure does not only have a relationship with Kolmogorov - Smirnov statistics, but also can be represented as a linear function of some optimal threshold criteria. With these facts, the suggested measure could be applied to test for comparing multiple distributions.

      • KCI등재

        VUS와 HUM 최적화를 이용한 선형함수의 모수추정

        홍종선,원치환,정동길,Hong, Chong Sun,Won, Chi Hwan,Jeong, Dong Gil 한국데이터정보과학회 2015 한국데이터정보과학회지 Vol.26 No.6

        ROC 곡선을 구성하는 한 개의 스코어 변수로 이루어진 분류모형을 확장하여 선형 스코어의 함수인 리스크 스코어를 고려하고, 선형 스코어의 계수를 추정하기 위한 방법으로 AUC를 최대화하는 방법을 사용한다. 이런 AUC 접근방법으로 구한 스코어의 계수 추정량은 로지스틱모형을 이용한 선형 스코어의 모수의 최대가능도 추정량보다 자료가 로지스틱 가정이 맞지 않는 일반적인 상황에서도 좋은 추정 결과를 보인다. 본 연구에서는 다항범주로 분류되어 현실적인 판별 및 예측 상황을 고려하여 AUC 접근방법을 확장한 VUS와 HUM 접근방법을 제안한다. 연결함수로는 로짓, complementary log-log와 로짓을 변형한 함수의 세 종류와 그리고 다양한 분류점의 분포인 경우에 대하여도 모의실험을 실시하였다. 본 논문에서는 다항범주 판별결과에 대하여 VUS와 HUM 접근방법도 AUC 접근방법과 유사하게 다양한 연결함수에 대하여 로지스틱모형 추정방법보다 동등하거나 더 나은 모수추정 결과를 보이는 것을 확인하였다. Consider the risk score which is a function of a linear score for the classification models. The AUC optimization method can be applied to estimate the coefficients of linear score. These estimates obtained by this AUC approach method are shown to be better than the maximum likelihood estimators using logistic models under the general situation which does not fit the logistic assumptions. In this work, the VUS and HUM approach methods are suggested by extending AUC approach method for more realistic discrimination and prediction worlds. Some simulation results are obtained with both various distributions of thresholds and three kinds of link functions such as logit, complementary log-log and modified logit functions. It is found that coefficient prediction results by using the VUS and HUM approach methods for multiple categorical classification are equivalent to or better than those by using logistic models with some link functions.

      • KCI등재

        2008년도 노인생활실태 및 복지욕구조사 자료의 통계분석

        홍종선,정충현,조민호,김혜정,Hong, C.S.,Jeong, C.H.,Cho, M.H.,Kim, H.J. 한국데이터정보과학회 2012 한국데이터정보과학회지 Vol.23 No.1

        고령화 사회에서 고령사회로 급격하게 변화하는 시점에서 노인의 특성과 생활실태를 정확히 파악하여 사회전반에서 발생하는 변화의 양상을 인식하고, 이에 대하여 효과적이고도 적극적으로 대응해야 할 필요성이 있다. 본 연구에서는 2008년도에 전국적으로 조사된 노인생활실태 및 복지욕구조사자료를 바탕으로 가구와 개인정보에 대한 노인생활실태를 파악하고 이러한 변수가 생활 만족도에 미치는 영향에 대하여 통계자료분석을 실시하여, 현실적 타당성과 적합성을 지닌 고령사회의 사회정책수립에 도움이 되고자 한다. We need to recognize the overall changes in Korean society with understanding the situation of the characteristic and actual living condition of the elderly, so to prepare efficient and active policies at the moment from aging society to aged society. Based on the 2008 national survey data of the actual living condition of the elderly and welfare need, the living condition of the elderly for household and individual information is identified and the effects on the life satisfaction of these variables are statistically analyzed. Therefore, this paper might help to establish the aged social policies with realistic validity and suitability and extend the academical understanding of Korean society.

      • KCI등재

        재대양주 동포의 한국어 교육

        홍종선 이중언어학회 2007 이중언어학 Vol.33 No.-

        Hong, Jongseon. 2007. 2. Korean Language Education for Korean in Oceania. Bilingual Research 33, 523-548. In the two countries in Oceania, Australia and New Zealand, the immigration of Korean has increased rapidly during the last 20 years. Since the number of Korean immigrants is expected to grow more in these areas, the policies for Korean immigrants such as education of the Korean language should be designed carefully for the future. Even though Korean Language schools in weekend are available and the course teaching Korean is an elective in the regular curriculum of elementary and middle schools in the two countries, the students who take it are rare. Since the governmental support would be increasing in Australia if more students take Korean, it is urged that Korean immigrants ask for opening of Korean courses in more regular schools, and furthermore that the Korean government backs up these plans with appropriate supports. However, the situation is different in New Zealand. Since there is no special governmental support for education of foreign languages and the Korean immigrant society is economically weak, the Korean government needs to provide intensive supports for the revitalization of Korean language schools.(Korea University)

      • KCI등재

        광복 70년, 국어학 외연의 확대와 발전

        홍종선 한국언어문학회 2015 한국언어문학 Vol.95 No.-

        Over 70 years since Independence, the outer edge of the Korean Linguistics has been expanded in various ways with the development of the Korean Linguistics. When we roughly divide the study which is included in the external areas of the Korean Linguistics into interdisciplinary research and applied research, there are philosophy of language, sociolinguistics, psycholinguistics, neurolinguistics, rhetorics, Korean stylistics, glottochronology, mathematical linguistics, computational Korean lingustics, Korean corpus lingustics and Korean language culture studies in interdisciplinary research. In applied research, there are Korean educational linguistics, Korean educational linguistics as a foreign language, Korean lexicography, Computational Korean Linguistics, Korean lalopathology, Korean language policy, Korean medium lingustics, Korean advertising lingustics, interpretation studies and translation studies. These external studies of Korean Linguistics and pure Korean Linguistics help each other to expand their views and research methodology, adding various viewpoints in many ways, and achieving mutual rising development by providing new facts and materials in the aspect of information. It can also contribute to the development of Korean language culture by adding practicality that can be used in real life through external studies. Among interdisciplinary researches and applied researches, there are a lot of fields where the researches are already activated but there are still quite a few areas which are about to be studied. In the future, Korean linguistics research should foster user-oriented grammar with researcher-oriented grammar and greatly develop the study of spoken language and discourse. Therefore, we should enlarge the cooperating researches providing more information to external areas of Korean linguistics.

      • KCI우수등재

        Partial VUS and optimal thresholds

        홍종선,정민섭,신혜수 한국데이터정보과학회 2019 한국데이터정보과학회지 Vol.30 No.4

        Based on many literature for the partial VUS (volume under the ROC surface), a partial VUS is proposed alternatively in this work. This partial VUS is represented as the probability and formulated with the integral equations using two kinds of the ROC surface functions. We derive some relationships among the first type of the ROC surface function, its derivatives and the second partial derivative of the partial VUS. It is found that the optimal thresholds for the ROC surface are derived by using derivatives of the ROC surface function or the third partial derivative of the partial VUS. And the second type ROC surface function is discussed and explained with the results obtained from the first type of the ROC surface function. Various normal distribution functions are illustrated to find two ordered optimal threshold using the partial VUS.

      • KCI등재

        The difference between two distribution functions

        홍종선 한국데이터정보과학회 2013 한국데이터정보과학회지 Vol.24 No.6

        There are many methods for measuring the difference between two location param-eters. In this paper, statistics are proposed in order to estimate the difference of two location parameters. The statistics are designed not using the means, variances, signs and ranks, but with the cumulative distribution functions. Hence these are measured as the differences in the area between two univariate cumulative distribution functions. It is found that the difference in the area between two empirical cumulative distribution functions is the difference of two sample means, and its integral is also the difference of two population means.

      • KCI등재

        한국어 어절 사전의 거시 구조: 올림말

        홍종선 우리어문학회 2014 우리어문연구 Vol.50 No.-

        Being an agglutinative language, Korean is abundant with postpositions and endings. Consequently, eojeol dictionary, which fully reflects this morphological feature, could be a much more useful form of dictionary comparing to traditional ones. In the field of Korean acquisition or computerization, this from of dictionary is especially important and necessary. In order to compile a Korean eojeol dictionary, its headwords should be the first under discussion. This paper looks into the characteristics, scale, morphology and arrangement of headwords of Korean enjeol dictionary. In an enjeol dictionary, the unit of headword is enjeol. This means that a combination of a noun and postpositions, or a combination of a verb/adjective and endings should both be dictionary entries. Thus all inflection forms of the same word, as well as traditional Korean dictionary entries such as word, postposition, ending, and idiomatic phrase are all eligible headwords. More over, to fully consider the user-need, when the pronunciation of a headword is different from its morphological form, this phonological form(one morph of the morpheme)should also be a headword. As another attempt to enhance practicality, informal orthographies and pronunciations which are widely used should also be listed as headwords. Pronunciation headwords, headwords that are Listed because they read different from their basic morphological forms, will be written in a bracket in order to be separated form their basic forms. Eojeols that share the same form or pronunciation are arranged by superscript according to their frequency. The number of headwords can be decided according to the dictionary scale. Generally, eojeols of a frequency of 2-3, or more, in a large-scale balanced corpus could be collected as headwords. Sub-entries are meaningless, all headwords are main entries in an eojeol dictionary. Finally, as for the idiomatic phrases , traditional compiling method can be applied as it is. 조사와 어미가 발달해 있는 첨가어인 한국어에서 어절 사전은 한국어의 특성을 살려 유용성을 높인 언어 사전이다. 특히 한국어 학습이나 전산화에서 어절 사전의 필요성은 더욱 크다고 할 것이다. 본고는 한국어 어절 사전을 편찬하기 위해 우선적으로 연구해야 할 올림말에 대하여 그 성격과 범위, 형태 및 배열에 관해 살피었다. 어절 사전에서 올림말의 단위는 ‘어절’이다. 명사에 조사가 결합된 형태나 동사 어간에 어미가 결합되어 있는 형태 전체가 올림말이 되는 것이다. 따라서 하나의 단어가 갖는 여러 가지 굴절 형태들이 모두 개별적으로 올림말이 된다. 물론 이전의 사전에 들어 있는 단어와 어근 및 접사, 어미들과 관용구도 함께 수용한다. 여기에 더하여 올림말의 발음이 형태론적 형태와 다를 경우에 이들 발음의 음운 형태 즉 이형태도 올림말에 넣는다. 이 사전의 이용자를 고려하여 활용성을 높이는 것이다. 규범에 맞는 표기나 발음 외에도 언중들이 많이 사용하는 표기나 발음도 올림말에 넣는 것 역시 실제적인 활용성을 위한 것이다. 기본 형태와 달라서 올림말이 된 발음 형태의 올림말은 철자를 [ ]로 싸서 기본형과 구분한다. 어깨번호는 동형 어절끼리와 동음 어절끼리 번호를 매기는데, 번호의 순서는 빈도수에 따른다. 올림말의 범위는 사전의 규모 계획에 따라 달라질 수 있다. 대규모 균형 코퍼스에서 어절 유형별 빈도가 2 또는 3 이상으로 하거나 그 이상에서 규모를 정할 수 있다. 모든 올림말은 부올림말 없이 주올림말이 되지만, 관용구는 이전 사전에서의 수록 방법을 겸한다.

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