전륜 구동·조향 방식 자율주행로보트의 구동알고리즘에 관한 연구

윤서영,이헌철,이은호 제어로봇시스템학회 1994 제어로봇시스템학회 국내학술대회 논문집 Vol.1994 No.10

The Perspectives and Effectiveness of Blended Learning in L2 Writing of Korean University Students

윤서영,이충현 한국멀티미디어언어교육학회 2010 멀티미디어 언어교육 Vol.13 No.2

The purpose of this study is to investigate the students’ perspectives and effectiveness of blended learning in L2 writing. Forty seven university students participated in two L2 writing classes. The data for this research was collected for 16 weeks. Data sources included questionnaire, pre-test, midterm examination, and post-test. The results are as follows: 1) the students’perspectives for blended learning were positive and the students considered it useful, helpful for improvement, and motivating in general. The students were very satisfied with both technological aspects and pedagogical aspects,particularly with interaction enabled through blended learning; 2) blended learning had positive effects on L2 writing, and there was an overall increase of test scores; 3) blended learning in L2 writing was found to be effective in mechanics, content, organization, and structure; and 4) there were no significant gender differences in general. Based on the findings, it seems that blended learning in L2 writing promotes learner interaction, learner autonomy, and collaborative learning. Follow up researches with more subjects in various levels using the model for Blended Learning in L2 Writing (BLW) is suggested.

Bacteremia Caused by Corynebacterium amycolatum with a Novel Mutation in gyrA Gene that Confers High-Level Quinolone Resistance

윤서영,김희정,이양순,김신영 대한진단검사의학회 2011 Annals of Laboratory Medicine Vol.31 No.1

Although Corynebacterium amycolatum can cause opportunistic infections, it is commonly considered as contaminant. In this report, we present a case of bacteremia caused by C. amycolatum with a novel mutation in the gyrA gene that confers high-level quinolone resistance to the organism.

The Impact of Language Learning Strategies in Blended Learning and Student’s Perspectives

윤서영 한국멀티미디어언어교육학회 2014 멀티미디어 언어교육 Vol.17 No.4

This study aims to explore the impact of language learning strategy instruction in blended learning andinvestigate how students use language learning strategies in blended learning context and their perspectives. The participants for the mixed study consisted of 108 freshmen university students in Korea, and the studywas conducted for 15 weeks. The quantitative data included the results of pre-test and post-test, aquestionnaire on perspectives on blended learning and a questionnaire of Strategy Inventory of LanguageLearning. The data for the qualitative research included the students’ weekly learning journals andsemi-structured interviews. The results are as follows: 1) language learning strategy instruction in blendedlearning was found to be effective for increasing students’ language proficiency; 2) the students perceivedblended learning and online activities to be interesting, satisfying, and useful, and offline activities to beinteresting and useful but less satisfying; and 3) the students used compensation strategies the mostfollowed by metacognitive, cognitive, social, affective and memory, in respective order, and the two leastused strategies were found in affective strategies category. Based on the results of the study, discussion,implications, and suggestions for further study are provided.

국내 한 대학병원 혈액원에서의 헌혈자선별검사 결과(2006∼2008)

윤서영,김문정,박규은,김현옥,김현숙 대한수혈학회 2009 大韓輸血學會誌 Vol.20 No.3

Background: Any data on the prevalence of the infectious diseases of blood donors at a university hospital-based blood bank is not available. We aimed to analyze the seroincidence of screening tests from blood donors at a university hospital-based blood bank in Korea. Methods: We retrospectively analyzed all the samples of blood donors during the previous three years from January 2006 to December 2008. HBsAg and HIV Ab/Ag Combo test were performed by chemiluminescent immunoassays, and anti-HCV was performed by enzyme-linked immunosorbent assay and electrochemiluminescent immunoassay. Serologic testing for syphilis was done by VDRL (venereal disease research laboratory test) and RPR (rapid plasma regain test). Results: The number of total blood donors that underwent screening tests were 1,279 in 2006, 1,355 in 2007 and 941 in 2008, respectively. HBsAg was positive in 8 cases among the 1,279 donors (0.63%) in 2006, in 10 cases of the 1,355 donors (0.74%) in 2007 and in 5 cases of the 941 donors (0.53%) in 2008. Anti-HCV was positive in 3 cases (0.24%) in 2006, 2 cases (0.15%) in 2007 and 2 cases (0.21%) in 2008. One of them was dual positive for HBsAg and anti-HCV. There’s no positive case of anti-HIV (0%) during the 3 years. Serologic testing for syphilis (VDRL) was positive in 7 cases (0.55%) in 2006, in 5 cases (0.37%) in 2007 and in 5 cases (0.53%) in 2008. Conclusion: The seroincidence was different between a university hospital-based blood bank and the Korean Red Cross Blood Service center. This difference might be due to the composition of donors, i.e., autologous blood donors and directed donors in the university-based blood bank. 배경: 의료기관 혈액원의 헌혈자 선별검사 결과에 대한 분석은 현재까지 많지 않다. 서울에 위치한 한 대학병원 혈액원에서 검사한 최근 3년간의 헌혈자 선별검사 결과를 후향적으로 조사하여 의료기관 혈액원에 내원한 헌혈자 선별검사의 양성률을 알아 보고자 하였다. 방법: 2006년 1월 1일부터 2008년 12월 31일까지 3년 동안 실시된 총 헌혈자 선별검사를 대상으로 그 결과들을 후향적으로 조사하였다. HBsAg 과 HIV Ab/Ag Combo 검사는 화학발광 미세입자 면역분석법을 사용하였으며, anti-HCV는 2006년과 2007년에는 효소면역법 검사로, 2008년에는 전기화학발광면역법으로 실시하였으며, 매독의 혈청검사는 VDRL 검사를 사용하였다. 결과: 세브란스병원에서 3년간 실시한 총 헌혈자 검사는 3,575건으로서, 2006년에는 총 1,279명에 대해 헌혈자 선별검사를 실시하였고, 2007년에는 1,355명, 그리고 2008년에는 941명에 대해서 헌혈자 선별검사를 실시하였다. 따라서 대상기간 3년간 총 3,575명의 결과를 분석하였다. HBsAg 검사의 양성 결과는 2006년 총 1,279건의 헌혈 중 8건(0.63%), 2007년 1,355건 중 10건(0.74%), 2008년에는 941건 중 5건(0.53%)이었다. Anti-HCV의 경우 양성 결과는 2006년에는 3건(0.24%), 2007년 2건(0.15%), 2008년 2건(0.21%)이었다. 이 중 1명은 HBsAg과 anti-HCV가 모두 양성이었다. Anti- HIV는 3년간 양성이 전혀 없었고, VDRL은 2006년 7건(0.55%), 2007년 5건(0.37%), 2008년 5건(0.53%)의 양성 결과가 있었다. 결론: 의료기관 혈액원에 내원하는 헌혈자의 선별검사 양성률은 일반 혈액원 헌혈자의 결과와 차이가 있었다. 이는 대상의 차이에서 기인된 원인으로 생각되는데, 특히 의료기관 혈액원에 자가혈액을 예치하기 위해 방문하는 자가헌혈자들의 선별검사나 지정헌혈자가 많기 때문인 것으로 생각된다.

Characteristics of thyroid nodules in infant with congenital hypothyroidism

윤서영,이정호,장윤우,이동환 대한소아청소년과학회 2014 Clinical and Experimental Pediatrics (CEP) Vol.57 No.2

Purpose: This study aimed to assess the characteristics of thyroid nodules among infants diagnosedwith congenital hypothyroidism. Methods: A retrospective study of 660 infants (374 males, 286 females) diagnosed with congenitalhypothyroidism was carried out at the Pediatric Endocrine Clinic in Soonchunhyang University Hospital,Korea, between May 2003 and February 2013. The average age at diagnosis was 1.16±1.68 months. Results: Of the 28 patients (4.2%) with thyroid nodules, 17 (2.6%) had cystic thyroid nodules and11 (1.6%) had solid thyroid nodules. There were no significant differences in gender or age betweencongenital hypothyroidism patients who hadthyroid nodules and those who did not. All nodules wereasymptomatic. The average age at diagnosis of congenital hypothyroidism with nodules was 1.42±1.39months. All detected nodules measured less than 1 cm in diameter. Twenty-two of the 28 infants(78.6%) had only one nodule, while multiple nodules were found in 6 infants (21.4%). Of the 28 infantsdiagnosed with nodules, 16 underwent thyroid ultrasonography during follow-up and 8 of them (50%)showed no signs of nodules at thyroid ultrasonography. Conclusion: The prevalence of thyroid nodules in infants with congenital hypothyroidism was 4.2%. Most thyroid nodules were small in size and benign, disappearing during follow-up observation. Wetherefore conclude that thyroid nodules in infants with congenital hypothyroidism can simply be observed anddo not require direct treatment.

The Impact of Explicit Listening Instruction on Teacher Preparation Practices in Blended Learning

윤서영,이충현 한국멀티미디어언어교육학회 2012 멀티미디어 언어교육 Vol.15 No.4

This study investigated the impact of explicit listening instruction in blended learning on teacher preparation practices of pre-service teachers to suggest appropriate listening instruction for teacher training programs. The study was conducted for 16 weeks at a university in Seoul with 14 pre-service teachers in intermediate listening course who had practicum in the same semester. Major findings of the study are as follows. First,the participants were able to apply explicit listening instruction in their teaching practice. Second, the participants felt that explicit instruction in blended learning was beneficial in their own teaching practice. Third, 8 participants considered their teaching practice during practicum to be successful, 1 partially successful, and 4 unsuccessful. Fourth, the difficulties and problems in L2 listening lesson in teaching practice during practicum were lack of feedback and interaction, lack of knowledge and experience,lack of time, mixed level classes, lack of appropriate materials, and lack of motivation and interest. Fifth, the needs for conducting a successful L2 listening lessons were teacher training on effective teaching methods and techniques, authentic listening materials, level differentiated classes, provision of appropriate teaching environment and technology, syllabus and curriculum design, and teacher ability in TETE. Suggestions and implication using explicit listening instruction in blended learning are also provided. *

Oroxylin A improves attention deficit hyperactivity disorder-like behaviors in the spontaneously hypertensive rat and inhibits reuptake of dopamine in vitro

윤서영,Ike Dela PENA,김성목,Tae Sun Woo,신찬영,손건호,박해일,이용수,류종훈,Mingli Jin,Kyeong-Man KIM,정재훈 대한약학회 2013 Archives of Pharmacal Research Vol.36 No.1

In previous studies we have demonstrated thatthe c-aminobutryic acid-A (GABA-A) receptor antagonistoroxylin A has an awakening effect and it also repressesADHD-like behaviors (hyperactivity, impulsivity andinattention) in the spontaneously hypertensive rat (SHR)model of attention-deficit hyperactivity disorder (ADHD). We hypothesized that the effects of oroxylin A wereexerted via the GABA-A receptor given the important roleof the GABAergic system in ADHD. However, it is possiblethat aside from the GABAergic system, oroxylin Amay influence other systems especially those implicated inADHD (e.g. DAergic, etc.). To test this hypothesis, weevaluated the effects of GABA agonist, or dopamine (DA)antagonist in oroxylin A-induced alleviation of ADHD-likebehaviors in SHR. SHR showed inattention and impulsivityas measured by the Y-maze and the electro-foot shockaversive water drinking tests, respectively. Oroxylin Asignificantly improved these behaviors, furthermore, itseffect on SHR impulsivity was attenuated by haloperidol, aDA antagonist, but not by baicalein, an agonist of theGABA-A receptor. In vitro studies showed that oroxylin Ainhibited DA uptake similar to methylphenidate, a dopaminetransporter blocker, but did not influence norepinephrineuptake unlike atomoxetine, a selective NEreuptake inhibitor. Collectively, the present findings suggestthat oroxylin A improves ADHD-like behaviors inSHR via enhancement of DA neurotransmission and notmodulation of GABA pathway as previously reported. Importantly, the present study indicates the potential therapeuticvalue of oroxylin A in the treatment of ADHD.

문학저널 kwani?에 나타난 소수문학적 특징

윤서영 한국외국어대학교(글로벌캠퍼스) 아프리카연구소 2013 Asian Journal of African Studies Vol.33 No.-

As a literary journal published annually in Kenya, kwani? is distinct in its format and content from other journals. Away from the standardized frame of other literary journals, this journal runs various works in different genres to help readers experience novelty and creative artistry. Moreover, in terms of content, it deals with political and social issues facing the Kenyan society as well as authors' individual agonies. By doing so, kwani? serves as an alternative and a tool for Kenyan people who are weary of various problems facing them in reality but cannot find a way to make their voices heard. This literary group uses sheng as a way to achieve this. The young express their own culture by altering the language of the majority and furthermore actively spread their ideas through a tool of literary journal. In the process, they create their own culture for a new and creative future by destroying the existing literary format and introducing new one. In this respect, such an effort of the young Kenyans may be considered political as it represents the voices of the political, ethnic (tribal), social and cultural minorities. And kwani? shows and supports their efforts. It accords with the deterritorialization of language, political nature, and collective assemblages of locutionary acts asserted in a minor literature. In this paper, kwani? that attempts to subvert format and order is defined as a minor literature claimed by Deleuze and Guattari.

Exploring learner variables: The influence of academic background on learner perceptions in using LRS

윤서영 팬코리아영어교육학회 2018 영어교육연구 Vol.30 No.4

This present study investigates learners’ perspectives on using LRS in EFL classrooms and the influence of academic background on their perspectives. For the study, a questionnaire, classroom observation, and interview were conducted to 232 EFL students in enrolled in A university in Korea. The findings show that learner perspectives on the LRS as a teaching and learning tool, the use of LRS in EFL classroom activities, and preferred features of LRS were positive across the board. Furthermore, findings on learner perspectives on strengths and weakness of using LRS in classroom are presented. Although largely positive across the board, significant differences were found in terms of academic majors where social welfare and healthcare services majors were significantly more positive than performing arts and science majors and liberal arts majors. According to the interview, the learning goals, expectations, and instructional methods of their respective majors were found to have influenced the participants’ perspectives on LRS activities. Based on the findings, pedagogical considerations and suggestions for using LRS with consideration for language learners with varied academic backgrounds in EFL classrooms are provided as well as suggestions for future studies.