A Study on 3-axis Flux-gate Magnetometer for Harbor Surveillance System

Eunhae Kim,Derac Son 한국자기학회 2017 한국자기학회 학술연구발표회 논문개요집 Vol.2017 No.11

Early and Late Child Bilinguals’ Productions of L1 and L2 Vowels

Eunhae Oh 한국응용언어학회 2013 응용 언어학 Vol.29 No.3

The current study investigated the effect of age of acquisition and amount of language experience on children’s vowel production of the first-(L1) and second-language (L2). A total of twelve Korean learners of English varying in the amount of L2 experience (2 years vs. 5 years) participated. For L1 (Korean) and L2 (English) vowel comparisons, the spectral quality of nine English and seven Korean vowels were recorded and analyzed. The results demonstrated that the production of both English and Korean vowels varied by group. The child group with 5 years of English exposure showed more distinct separation between Korean and English vowel categories than the child group with 2 years of experience. The results suggest that late learners of L2 are likely to show a greater degree of interaction between L1 and L2 compared to early learners.

Combination of CDK4/6 Inhibitor Plus Endocrine Therapy in Adjuvant Setting

Eunhae Um 대한외과학회 2022 대한외과학회 학술대회 초록집 Vol.2022 No.11

Durational aspects of Korean nasal geminates

Eunhae Oh 한국음성학회 2017 말소리와 음성과학 Vol.9 No.4

The current study focused on the production of geminate nasal consonants across different word boundary types in Korean as a function of speech style to investigate whether temporal properties are preserved across varying speaking rates. Assimilated geminates in Korean, known as true geminates, are produced with distinctively longer consonant duration compared to singletons. Despite a large body of literature for geminates across different languages, geminates in Korean have been relatively less investigated with respect to the durational patterns in relative terms and temporal variabilities. In this study, singletons, word-internal geminates and word-boundary (fake) geminates produced by ten native Seoul Korean speakers were compared in terms of absolute consonant closure duration, preceding vowel duration, the relative ratios (consonant-to-preceding vowel duration) as well as the temporal variabilities in speech production. The results showed that word-internal geminates were produced with longer consonant duration and greater temporal variabilities than singletons and word-boundary geminates in absolute duration, indicating relatively greater flexibility in timing. However, only word-internal geminates were produced with distinctively longer consonant duration with significantly lower variability in relative duration regardless of speech styles. The results provide some insight into the representation of temporal information in the production of Korean geminate consonants.

The effect of L2 experience on the perception of L1 prosody

Eunhae Oh 한국음운론학회 2017 음성·음운·형태론 연구 Vol.23 No.2

The effects of second language experience on adult learners’ perception of native language prosody are investigated. Three sets of 13 sentences produced in Korean, Mandarin, and Japanese, respectively, by three female speakers were low-pass filtered and presented to three groups of 10 participants with different language backgrounds: Native Korean speakers with no L2 experience (NK), native Mandarin Chinese speakers (NC) and Korean learners of Chinese (KC) with an average LOR in China of 1 year. The participants were instructed to listen to each stimulus and decide whether it was Korean or not based on the suprasegmental features. Overall, the NK group (76%) revealed significantly higher accuracy than the KC (65%) or the NM group (57%). However, the NM participants with extensive Korean experience showed a significantly high accuracy for both Korean (75%) and Chinese (84%). The results indicate a significant effect of L2 experience on the acquisition of L1 prosody, yet the KC group’s lower accuracy for Korean, on the other hand, suggests that too much attention may have been directed towards acoustically salient L2 cues (e.g., F0 range) in the perception of L1 prosody.

Effects of L2 experience on the production of Korean stop contrasts by Mandarin Chinese learners

Eunhae Oh 경희대학교 언어정보연구소 2018 언어연구 Vol.35 No.1

Effects of L2 experience on the segmental and prosodic production of second language were investigated. Thirty two Chinese learners of Korean varying in the amount of experience (3 months vs. 2 years) were compared to sixteen age-matched native Korean speakers in their production of three-way contrastive stops (aspirated, lenis, tense). Korean four-syllable phrases (i.e., Accentual Phrase) beginning with each stop type in a word-initial position were elicited. VOT, F0, H1-H2 values of the segments as well as an Accentual phrase-initial boundary tones were analyzed and compared across groups. The results showed significant differences in F0 and H1-H2 as a result of experience, albeit F0 was not native-like in the experienced group’s production. The Accentual phrases-initial boundary tones, however, were produced with a native-like F0 pattern regardless of the amount of L2 experience. The native-like production of VOT and F0 in the tonal context in both L2 groups is likely to be the influence of L1, whereas the improved cues, H1-H2 and F0 in the segmental context, are the result of L2 experience.

Korean speakers hyperarticulate vowels in polite speech

Eunhae Oh,Bodo Winter,Kaori Idemaru 한국음성학회 2021 말소리와 음성과학 Vol.13 No.3

In line with recent attention to the multimodal expression of politeness, the present study examined the association between polite speech and acoustic features through the analysis of vowels produced in casual and polite speech contexts in Korean. Fourteen adult native speakers of Seoul Korean produced the utterances in two social conditions to elicit polite (professor) and casual (friend) speech. Vowel duration and the first (F1) and second formants (F2) of seven sentence- and phrase-initial monophthongs were measured. The results showed that polite speech shares acoustic similarities with vowel production in clear speech: speakers showed greater vowel space expansion in polite than casual speech in an effort to enhance perceptual intelligibility. Especially, female speakers hyperarticulated (front) vowels for polite speech, independent of speech rate. The implications for the acoustic encoding of social stance in polite speech are further discussed.

The acquisition of acoustic correlates of politeness by native Chinese speakers

Eunhae Oh,Mao Cui 경희대학교 언어정보연구소 2020 언어연구 Vol.37 No.S

The current paper explores the acoustic correlates of polite speech in Chinese to examine the similarities and differences of phonetic features contributing to the conveyance of politeness between Korean and Chinese. Building on the previous research on different levels of politeness in Korean, Experiment 1 investigated the phonetic characteristics of deferential and non-deferential Chinese utterances produced by eight native Chinese speakers. The results showed that F0, intensity, H1-H2, HNR and duration played important roles in distinguishing deferential from non-deferential speech, which conform to the patterns shown in Korean. Experiment 2 further assessed deferential and non-deferential speech in Korean produced by Chinese learners of Korean under the assumption that Chinese learners will express deference in the L2 without much difficulty due to the shared phonetic knowledge in the L1. The implications of these findings are discussed in terms of cross-cultural multimodal politeness and the implicit acquisition of sociopragmatic knowledge in the L2.

The Effects of Digital Content on Usefulness, Flow, and Usage Intention : Focusing on the Types of Digital Content Users

Eunhae Oh,San-il Lee 한국디지털융합학회 2021 IJICTDC Vol.6 No.1

With the emergence of Web 2.0, the role of digital content users has expanded from digital content consumers to digital content creators, both of which are contributing significant changes in the economy, society, and culture. In light of this phenomenal trend, we categorize digital content users into digital content user 1.0 (passive users) and digital content user 2.0 (proactive users) in order to develop specific business models and digital service strategies. These two types of digital content users are established based on the patterns of the digital content usage. Along with these types, the effects of digital content characteristics (design, scenario, structure, and technology) on the usefulness, flow and usage intention of digital content are analyzed. Results show that design characteristics do not affect usefulness for both user types. While the technological characteristics of digital content have a positive effect on the flow of digital content user 1.0, the design, scenario, and structure characteristics have a positive effect on the flow of digital content user 2.0. Our study helps managers establish digital content business strategies and digital service plans based on the characteristics of digital content and digital content user types. Our study also provides a theoretical foundation for future digital content related studies.

The relationship between “native-like” L2 vowel production and perceptual judgments enhancement by native listeners

Eunhae Oh 경희대학교 언어정보연구소 2019 언어연구 Vol.36 No.2

The relationship between second language (L2) vowel production as a function of L2 experience and its perceptual judgments by native listeners of the language was investigated to determine whether the production improvement in the specific acoustics of L2 vowels give rise to higher judgement accuracy. A total of 20 Mandarin Chinese differing in the L2 experience (6 months vs. 2 years) were compared to ten native Korean speakers in their production of seven Korean vowels. The vowel production was used for an identification test by 23 native Korean speaking listeners to further verify the effects of L2 experience on the native Korean listeners’ judgments of Chinese speakers’ vowel production. For the analyses, F1 and F2 values of the initial vowels were measured and normalized across the three groups. The production results showed that the Korean mid vowels /ɛ/ and /ʌ/ were produced in a more native-like manner with increased L2 experience. As for the perception results, Chinese speakers’ non-native-like production of Korean vowels /ɛ/ and /ɯ/ showed high judgement accuracy, whereas more native-like vowels /u/ and /ʌ/ displayed significantly lower accuracy. Overall, the acoustic distinctiveness, rather than native-likeness, of the L2 vowel categories was shown to yield higher accuracy for the perceptual judgments by native listeners. (Konkuk University)