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Keeping and Losing Contrast: Spirantization and Release in Assamese and other Indic Languages
Seok-Chae Rhee 한국음운론학회 1999 음성·음운·형태론 연구 Vol.5 No.2
Rhee, Seok-Chae. 1999. Keeping and Losing Contrast: Spirantization and Release in Assamese and other Indic Languages. Studies in Phonetics, Phonology and Morphology 5.2, 357-384. This paper claims that word-final spirantization in Assamese is a result of the functional strategy aiming at the auditory strengthening for maximization of contrast. I suggest that such a strategy be best understood under the close observation of the release/nonrelease of the word-final stops of the language. Moreover, this paper compares the strategy adopted in Assamese with the ones in other lndic languages, arguing that spirantization and release/nonrelease might be consequences of linguistic function. (Yonsei University)
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이석재 서울대학교 어학연구소 1999 語學硏究 Vol.35 No.3
In the patterns of place assimilation between consonants, stops are more likely to undergo and trigger place assimilation than fricatives. To deal with this asymmetry, this paper proposes a constraint SHARECOND, under the formalism of Steriade(1992, 1993, 1994), requiring that sharing of a place feature occur between A_0's. High ranking of this constraint explains why place aaimilation does not happen in a consonant cluster containing a fricative. Moreover, imposition of SHARECOND in the grammar opens up a way to formally account for why a released stop is excluded from the target of place assimilation and why direction of place assimilation is predominantly regressive.
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한국 예비 대학생의 영어 사용 특성 파악을 위한 대규모 공개 영어 학습자 코퍼스 구축 및 분석
이석재(Seok-Chae Rhee),정채관(Chae Kwan Jung) 한국콘텐츠학회 2014 한국콘텐츠학회논문지 Vol.14 No.11
최근 영어 학습자 코퍼스(English learner corpus)를 활용하여 다양한 영어 교육 분야에 활용하는 시도가 이뤄지고 있다. 하지만 지금까지 국내에서 개발된 대다수 영어 학습자 코퍼스는 소규모이거나 공개가 되지않아 공익을 위한 영어 교육 콘텐츠로서의 적절한 역할을 하지 못하고 있다. 본 연구에서는 국내외 영어학습자 코퍼스 구축 현황을 살펴보고 대규모 공개 한국인 영어 학습자 코퍼스의 필요성을 논의한다. 또한, 이와 같은 필요성을 바탕으로 1백만 단어 이상으로 만들어진 대규모 공개 한국인 영어 학습자 코퍼스 구축과정과 결과를 분석하여 예비 대학생의 영어사용 특성을 파악하고 이를 영어 교육 개선을 위해 활용할 수 있는 방안을 제안한다. In recent years, researchers have become increasingly interested in the creation and pedagogical use of English learner corpora. Many studies have shown that learner corpora can not only make a significant contribution to second language acquisition research but also contribute to the construction and evaluation of language tests by advancing our understanding of English learners. So far, however, little attention has been paid to the Korean EFL (English as a foreign language) learners corpus. The Yonsei English Learner Corpus (YELC 2011) is a specialized, monolingual, and synchronic Korean EFL learner corpus that was developed by Yonsei University from 2011 to 2012. Over 3,000 Korean high school graduates (or equivalents) who were accepted by Yonsei University for their further studies participated in this project. It consists of 6,572 written texts (1,085,828 words) at nine different English proficiency levels. In this paper, we describe its compilation, and more specifically, how we have corpusized from a text archive to a corpus. After introducing the process of corpusization, we report arresting insights into the specific linguistic features that different proficiency levels of Korean learners of English have. This study also discusses the potential use of the YELC 2011 which is now freely available for research purposes.
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한국 초등학생 영어 발화의 문형에 따른 억양 및 문장 리듬 연구
이석재(Rhee Seok-Chae),장길영(Chang Kil-Young) 한국외국어교육학회 2003 Foreign languages education Vol.10 No.4
This study aims at identifying the differences in the realization of intonation types and sentential rhythm found in the verbal utterances spoken by Korean and American elementary school students. For the purpose of this study, six students in the 5th grade of a Korean elementary school and 4 same-aged native speakers were sampled. Short conversational texts including 6 basic sentence patterns were sampled from an English textbook. The subjects' utterances were recorded in a digital audio tape to be analyzed comparatively using a sound analysis program The overall conclusion is that Korean elementary school students implement, almost regardless of the sentence types, half as much pitch fluctuation as the American elementary school students, resulting in the very weak realization of sentential rhythm and intonation.
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Morphologic Changes in Microcystin-LR Treated Hepatocytes In vitro
Rhee, Seong-Hee,Kim, Bum-Seok,Lim, Chae-Woong Korean Society of ToxicologyKorea Environmental Mu 2006 Toxicological Research Vol.22 No.3
Microcystin-LR(MC-LR), a cyanobacterial toxin produced by Microcystis aeruginosa, causes severe hepatotoxicity. Here we investigated the morphologic changes of rat hepatocyte spheroid induced by exposure of MC-LR($10^{-6}M$) in vitro. In addition, to determine the effects of such toxin in the process of hepatocyte spheroid formation, primarily isolated hepatocytes were incubated with MC-LR and the process of spheroid formation was observed. In both hepatocyte spheroid and suspension culture systems, the morphologic changes caused by MC-LR were noticible at 5 min post exposure and were characterized by the loss of microvilli, cytoplasmic vacuolation, the accumulation of lipid droplets, and blob formation. Especially, the size and numbers of blob on the cell surface were increased as the incubation time prolonged and the appearance of electron dense bodies were observed in the cytoplasm of hepatocyte at 20 min post exposure. Furthermore, bile canaliculi-like structures in the hepatocyte spheroids were slightly widened and the process of spheroids formation was inhibited in the isolated hepatocytes incubated with MC-LR. These results indicate that morphologic changes in. the hepatocyte membrane and organelles seem to be typical events in showing the MC-LR induced hepatotoxic effects and the spheroid culture method might be a useful experimental tool to evaluate hepatoxicity since it reflects the in vivo status of hepatocytes.
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한국인과 원어민 영어 발화의 F0 고저 범위 차이와 발음 평가에 있어서 그 역할
이석재,조철현,문선영 한국음성과학회 2003 음성과학 Vol.10 No.4
This study examines the high-low pitch range differences between Korean and native English speakers' utterances of 36 English sentences, and explores the role of the pitch fluctuation range in the pronunciation assessment. Findings are: i) Korean speakers implement half as much pitch fluctuation as the native speakers with the achievement rate of, on an average, 47%. Especially, pitch fluctuation range is below the average in the sentence types of exclamation, yes-no & wh-questions, ii) the reason why Korean speakers' pitch fluctuation range is only half the range of the native speakers is that Korean speakers do not raise the pitch at certain sentence positions so much as the native speakers, and iii) the range of pitch fluctuation plays an important role in distinguishing the utterances of the native speakers from those of Korean speakers, but does not in rating the English utterances among Korean speakers.
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A Corpus-Based Study of the Use of Shell Nouns as Cohesive Devices in Korean EFL Writing
Jihyeon Jang,Seok-Chae Rhee 한국영어어문교육학회 2014 영어어문교육 Vol.20 No.3
The current study examines the use of shell nouns in argumentative essays written by Korean EFL college writers. Shell nouns are a group of abstract nouns that requile lexical 1ealization in order to establish full meaning of the nouns. Fact, problem and reason are the representative items of shell nouns. Using a corpusbased method, this study analyzes shell nouns in EFL written production in terms of cohesive devices. The result indicates that both the total frequency of shell nouns and the use of shell nouns with demonstratives move closer to that of the native group, as L2 proficiency level goes higher. In addition, the qualitative analysis discloses that the L2 writers use shell nouns as exophoric references and deploy shell nouns without elaboration. It is also shown that, regardless of L2 levels, the EFL writers underuse demonstrative and shell noun phrases in sentence initial position, which is critical to establish cohesion for argumentative essays. It indicates that Korean EFL learners also have difficulties in using the cohesive property fitted into argumentative writing. These findings provide pedagogical implications that can be applied to second language writing instruction.
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