This study compares AI PengTalk’s assessments of Korean children’s pronunciation with the assessments of Korean teachers. Sixty Korean sixth-graders participated as assessees, and four Korean elementary teachers participated as assessors. Both PengTalk and the teachers rated the children’s production of 10 English sentences on a five-point scale. They focused on segmentals, stress-rhythm, intonation, and speech rate. The findings were as follows: Firstly, PengTalk evaluated the children’s pronunciation in the four elements significantly lower than the teachers across all English proficiency levels. Secondly, teachers’ ratings of the students aligned more closely with their pre-evaluated English proficiency levels than the AI PengTalk’s assessments. The teachers rated students at the upper level significantly higher than those at the intermediate level, who were, in turn, assessed significantly higher than those at the lower level in all four elements. Furthermore, AI PengTalk and the teachers differed in the mean order of the four elements, particularly in segmentals. Based on the results of this study, suggestions were made for the development and implementation of AI-based English programs.

쇠고기 이력추적제는 소 개체마다 이력번호를 부여하여 수입쇠고기가 한우고기로 둔갑하는 사례를 막고, 소비자 에게 구입한 한우고기의 세부 이력 정보들을 제공하는 데 도움을 준다. 이번 연구는 2021년-2022년 서울지역 대형 축산물판매업소에서 유통되는 한우고기 344건에서 DNA 동일성 검사를 실시하여 이력번호 등 주요 표시정보들의 진위를 판별하였다. 그 결과 45건(13.1%)에서 이력번호가 불일치한 것으로 확인되었다. 불일치율은 2021년(14.7%) 에 비해 2022년(11.3%) 감소하였고, 도심서북권 20.7%, 동 북권 14.4%, 서남권 및 동남권 10.2% 순으로, 북부권 (16.9%)이 남부권(10.2%)에 비해 높게 나타났다. 또한 6개 브랜드 중 B사 및 D사는 이력관리가 양호한 반면, E사 및 A사는 이력관리가 취약한 것으로 확인되었고, 통계적 으로 유의한 결과 차이를 보였다(P<0.001). 이력번호 불일 치 시료의 실제 이력번호는 업소 내 입(출)고 거래내역 자 료를 근거로 조사하였고, 그 결과 실제 이력번호 확인율 은 53.9%에 불과하였으나, 확인된 범위 내에서 시료의 표 시정보 진위 판별 결과, 거짓 표시는 이력번호 13.1%, 성 별 2.9%, 도축장명 2.2%, 등급 1.6% 순으로 나타났고, 품종 (한우) 거짓 표시는 없었다. 거짓 표시 축산물의 유통 차 단을 위해 표시정보의 신속한 진위 판별이 중요하므로 업 소 내 이력번호가 기재된 날짜별 부분육 소분할 작업내역 작성을 의무화하는 법적 근거 마련이 필요하다. 본 연구 결과는 투명한 축산물 유통 거래 질서 정착을 위한 이력 관리 방향 설정에 참고자료로 활용하고자 한다.

This study investigated purplish Washington clam, Saxidomus purpuratus on its gonadal development, reproductive cycle and shell length (age) at 50% female group maturity from January to December 2011 in Jinhae Bay, Korea. This species is dioecious. The gonad index (GI) began to increase in January, reached the maximum value in May and to decrease in June, reached the minimum value in September then to increase slowly in October again. The reproductive cycle of the clams can be divided into five successive stages: the early active stage (Ea, from February to March), the late active stage (La, from January to March and October to December), the ripe stage (R, from January to May), the spawning stage (S, from June to December) and the degenerative and inactive stage (Ia, from January to February and November to December). The spawning periods were from June to December and the main spawning periods were from July to October. The shell length at 50% female group maturity (SL50) was estimated to be 63.6 mm, which can be converted as sexual maturity age of 2.2 year.

A foreign accent in a second language (L2) may be caused by nonnative-like pronunciation of suprasegmental elements such as stress as well as segmental elements of the L2 phonological system. In the literature of L2 phonological acquisition, however, most studies have focused on the segmental features and only a few studies have investigated the L2 acquisition of suprasegmental elements. This study examines the acquisition of English word stress by adult speakers of Korean in an attempt to see how they learn English stress patterns, particularly if they treat nouns and verbs differently and show sensitivity to the internal syllable structure with respect to stress assignment or if they treat English word stress entirely as a lexical phenomenon. For this, 51 Korean university students were assigned the production and perception tasks in which they were instructed to produce 35 monomorphemic nouns and verbs classified into 7 classes according to stress patterns and listen to them to mark on which syllable they perceived stress to be. It was revealed in this study that although they had no knowledge of stress placement associated with lexical category, vowel weight and the extramatricality of word-final consonants in English, they showed sensitivity to the effect of coda consonants, treating open and closed syllables differently. Based on the results of this research, pedagogical implications are suggested for the teaching of English word stress.