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      • KCI등재

        A Study on the Korean EFL Learners' Grammatical Knowledge Development under Input-enhanced FFI and Output-enhanced FFI Conditions

        황희정,Hwang, Hee-Jeong The Society of Digital Policy and Management 2018 디지털융복합연구 Vol.16 No.5

        본 연구의 목적은 형태초점교수법이 학습자의 언어형태에 관한 지식 향상에 미치는 영향을 조사하고, 학습자들이 그 형태에 관한 지식을 출력활동인 글쓰기에 어떻게 활용하는지를 살펴보는 것이다. 연구참여자들은 122명의 대학생들로 3개의 집단 즉 입력강화집단 35명, 출력강화집단 41명, 대조집단 46명으로 나누어 평가시험과 글쓰기 과제를 사전 사후로 실시하였다. 연구결과를 살펴보면, 입력강화 형태초점교수법과 출력강화 형태초점교수법 모두 학습자의 언어형태 학습에 영향을 미치는 것으로 드러났고, 학습자들이 이러한 형태초점교수법으로 습득한 지식을 영어글쓰기에 활용하는데 기여한 것으로 나타났다. 본 연구결과에 의거하여, 학습자의 언어형태 학습의 효과를 극대화할 수 있는 방법으로 입력강화와 출력강화기법을 적절하게 결합한 형태초점교수법을 적용할 것을 제안한다. This study explores the effects of different Focus-on-Form Instruction (FFI) on improving learners' grammatical knowledge development and observes how the learners apply the knowledge to their output. A total of 112 college students were placed into three groups: 35 input-enhanced group students, who received visually enhanced input reading materials, 41 output-enhanced group students, performing dictogloss tasks, and 46 control group students given traditional grammar instruction. All the participant students took pre/post grammatical tests and completed pre/post writing tasks, which aimed to look into how the target grammatical structures were used in writing. The research findings indicated that both input-enhanced and output-enhanced FFI were effective on learners' language form learning and made contribution to their writing. Based on the findings, this study suggests that the elaborate design of combination of both FFI can maximize learners' language form learning.

      • KCI등재

        Association Between Plaque Thickness of the Thoracic Aorta and Recurrence of Atrial Fibrillation After Ablation

        황희정,이만영,윤호중,오용석,노태호,정욱성,박철수,최윤석,정우백,이재범,박현근,임근준,이재학 대한심장학회 2011 Korean Circulation Journal Vol.41 No.4

        Background and Objectives: Several predictors of recurrence of atrial fibrillation (AF) after ablation have been identified, including age, type of AF, hypertension, left atrial diameter and impaired left ventricular ejection fraction. The aim of this study was to investigate whether the atherosclerotic plaque thickness of the thoracic aorta is associated with a recurrence of AF after circumferential pulmonary vein ablation (CPVA). Subjects and Methods: Among patients with drug-refractory paroxysmal or persistent AF, 105 consecutive (mean age 58±11 years, male : female=76 : 29) patients who underwent transesophageal echocardiography and CPVA were studied. The relationships between the recurrence of AF and variables, including clinical characteristics, plaque thickness of the thoracic aorta, laboratory findings and echocardiographic parameters were evaluated. Results: A univariate analysis showed that the presence of diabetes {hazard ratio (HR)=3.425; 95% confidence interval (CI), 1.422-8.249, p=0.006}, ischemic heart disease (HR=4.549; 95% CI, 1.679-12.322, p=0.003), duration of AF (HR=1.010; 95% CI, 1.001-1.018, p=0.025), type of AF (HR=2.412, 95% CI=1.042-5.584, p=0.040) and aortic plaque thickness with ≥4 mm (HR=9.514; 95% CI, 3.419-26.105, p<0.001) were significantly associated with the recurrence of AF after ablation. In Cox multivariate regression analysis, only the aortic plaque thickness (with ≥4 mm) was an independent predictor of recurrence of AF after ablation (HR=7.250, 95% CI=1.906-27.580, p=0.004). Conclusion: Significantly increased aortic plaque thickness can be a predictable marker of recurrence of AF after CPVA.

      • KCI등재

        The Clinical Impact of Bedside Contrast Echocardiography in Intensive Care Settings: A Korean Multicenter Study

        황희정,손일석,김우식,홍그루,최의영,임세중,이상철,정욱진,최정현,서혜선,윤세정,조경임,김형섭,윤현주 대한심장학회 2015 Korean Circulation Journal Vol.45 No.6

        Background and Objectives: We assessed the ability of portable echocardiography (with contrasts) to clearly delineate the cardiacstructure, and evaluated the impact of its use on the diagnosis and management of critically ill patients in Korea. Subjects and Methods: We prospectively enrolled 123 patients (mean age 66±16 years), who underwent portable transthoracicechocardiography (with contrast) for image enhancement at 12 medical centers. The quality of the global left ventricular (LV) images, thenumber of the regional LV segments visualized, the ability to visualize the LV apex and the right ventricle (RV), and any changes in thediagnostic procedure and treatment strategy were compared before and after the contrast. Results: Of the 123 patients, 52 (42%) were using mechanical ventilators. The amount of poor or uninterpretable images decreased from48% to 5% (p<0.001), after the contrast. Before the contrast, 15.6±1.1 of 16 LV segments were seen, which improved to 15.9±0.6segments (p=0.001) after the contrast. The ability to visualize the LV apex increased from 47% to 94% (p<0.001), while the inability toclearly visualize the RV decreased from 46% to 19% (p<0.001). Changes in the diagnostic procedure (for example, not requiring othertypes of imaging studies) were observed in 18% of the patients, and the treatment plan (medication) was altered in 26% of patients afterthe contrast echocardiography. Conclusion: The use of a contrast agent during the portable echocardiography, in intensive care settings, can improve the image qualityand impact the diagnostic procedures and treatment for Korean patients.

      • KCI등재

        제2 언어학습자의 주목 및 영어 글쓰기에 대한 모델글과 재구성글의 역할에 관한 연구

        황희정,Hwang, Hee Jeong 한국콘텐츠학회 2022 한국콘텐츠학회논문지 Vol.22 No.10

        This study aimed to explore the role of models and reformulations as feedback to English writing in L2 learners' noticing and their writing. 92 participants were placed into three groups; a models group (MG), a reformulations group (RG), a control group (CG), involved in a three-stage writing task. In stage 1, they were asked to perform a 1st draft of writing, while taking notes on the problems they experienced. In stage 2, the MG was asked to compare their writing with a model text and the RG with a reformulated version of it. They were instructed to write down whatever they noticed in their comparison. The CG was asked to just read their writing. In stage 3, all the participants attempted subsequent revisions. The results indicated that all the participants noticed problematic linguistic features the most in a lexical category, and models and reformulations led to higher rate of noticing the problematic linguistic features reported in stage 1 and contributed to subsequent revisions. It was also revealed that the MG and RG significantly improved with their writings of MG and RG on the post-writing test. The findings imply that models and reformulations result in better performance in L2 writing and should be promoted in an English writing class.

      • KCI등재

        플립러닝 기반 영어수업의 글쓰기 과제에 대한 오류수정 피드백이 영어 성취도에 미치는 영향과 수업 만족도 예측요인 규명

        황희정,Hwang, Hee-Jeong 한국디지털정책학회 2020 디지털융복합연구 Vol.18 No.9

        This study aims to examine the effects of CF about learners' English writing through FL on English improvement and the factors that influence class satisfaction. For achieving this purpose, response to CF and feelings about CF were selected as predictive variables. It is intended to investigate how these variables predict learners' satisfaction. A total of 94 university students were placed into two groups: 48 experimental group, who received CF on their writing through FL, and 46 control group given traditional instruction. All the participants took pre/post tests including writing tasks, and the experimental group completed a questionnaire after the instructional treatment. The findings indicated that FL affected English improvement and both response to CF and feelings about CF predicted class satisfaction. Based on the findings, this study sheds light on the implications of how to manage the FL class efficiently. 본 연구의 목적은 플립러닝 모형을 적용한 영어수업에서의 글쓰기 과제에 대한 오류수정 피드백이 학습자의 영어 성취도에 어떠한 영향을 미치는지를 파악하고, 수업 만족도에 영향을 미치는 요인이 무엇인지를 규명하는 것이다. 본 연구를 위해 수업 만족도를 예측하는 요인으로 오류수정 피드백에 대한 반응과 감정을 선정하고, 이들의 예측력을 규명하였다. 연구 참여자들은 94명의 대학생으로 두 개의 집단인 플립러닝을 적용한 실험집단 48명과 전통적 교수법을 적용한 통제집단 46명으로 나누어 평가시험과 글쓰기 과제를 사전·사후로 실시하고, 수업 처치 후 실험집단을 대상으로 설문조사를 진행하였다. 연구 결과를 살펴보면, 플립러닝을 기반으로 한 수업 방법이 학습자의 영어 성취도 향상에 유의미한 영향을 미치는 것으로 나타났으며, 오류수정 피드백에 대한 반응과 감정 모두 수업 만족도를 유의미하게 예측하는 것으로 나타났다. 이러한 결과를 근거로, 본 연구에서는 플립러닝형 수업의 효율적인 운영을 위한 방안을 제안하고자 한다.

      • KCI등재

        코퍼스 기반 항공영어의 어휘 특성 연구

        황희정 대한관광경영학회 2019 觀光硏究 Vol.34 No.6

        This paper is designed to explore the lexical properties of air traffic English through Air Traffic English Corpus (ATEC). To achieve this goal, the following two steps were taken. Firstly, both spoken (ATEC(S)) and written (ATEC(W)) corpora were compiled. The former (ATEC(S)) includes around 100,000 running words from video clips and news in the three aviation-related areas, Airline Service Management, Aeronautical Science & Flight Operation, and Aviation Maintenance Engineering, and the latter (ATEC(W)) 1,000,000 from 6 textbooks and 70 articles published in the four aviation-related journals. Secondly, Scott’s (2016) WordSmith 6.0 program was utilized to extract wordlist and keywords from both ATEC(S) and ATEC(W). Furthermore, to extract them from the two corpora, American English corpora (ANC, AmE06) and British English corpora (BNC Baby, BE06) were used as a reference corpus. The result showed that ATEC had unique lexical properties of air traffic English distinguished evidently from general English, and thus, the present study suggests that the keyword lists of ATEC would be made use of teaching or studying air traffic English efficiently. 본 연구의 목적은 항공영어 코퍼스(Air Traffic English Corpus, ATEC)를 구축하여 항공영어의 어휘적 특성을 밝히는 것이다. 이를 위한 첫 번째 단계로, 구어체 코퍼스인 ATEC(S)와 문어체 코퍼스인 ATEC(W)를 구축하였다. ATEC(S)는 항공서비스, 항공운항 및 항공정비 분야의 동영상을 통해 10만 어절을 구축하였고, ATEC(W)는 항공 관련 세 분야의 교재 6권과 학술지 4개의 저널 중 70개 논문에서 100만 어절을 구축하였다. 두 번째 단계로는, Scott(2016)의 WordSmith 6.0 프로그램을 사용하여 ATEC(S)와 ATEC(W) 코퍼스의 워드리스트와 키워드를 추출하였다. 특히 워드리스트와 키워트 추출을 위해 미국영어 코퍼스인 ANC와 AmE06와 영국영어 코퍼스인 BNC와 BE06을 참조 코퍼스로 활용하였다. 연구결과에 따르면, ATEC에는 일반영어와는 다른 항공영어만의 어휘적 특성이 존재하는 것으로 나타났다. 따라서 본 연구결과를 근거로 효과적인 항공영어 학습을 위해 ATEC의 어휘목록을 활용할 수 있기를 기대한다.

      • KCI등재

        Impact of factors affecting the efficacy of intense pulsed light for reducing Bacillus subtilis spores

        황희정,김규아,정명수 한국식품과학회 2021 Food Science and Biotechnology Vol.30 No.10

        This study investigated how the following fourintense pulsed light (IPL) treatment factors affect theinactivation of Bacillus subtilis (KCCM 11,315) spores:distance between the sample and IPL lamp (8, 13, and18 cm), pulse width (0.5, 1.3, and 2.1 ms), charging voltage(1000, 1200, and 1400 V), and processing time (10, 20,and 30 s). The results showed that all four factors considerablyinfluenced the spore inactivation rate in differentways. Excluding processing time, which does not affect thepulse itself, the effect was largest for pulse width, followedby distance, and charging voltage. The optimal treatmentcondition that maximized the inactivation rate was a distanceof 8 cm, a pulse width of 2.1 ms, a charging voltageof 1000 V, and a processing time of 30 s, which togetherproduced a 6 log reduction. It revealed that individualfactors need to be investigated together for achieving theoptimal condition of IPL.

      • KCI등재

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