STAR FORMATION RATE AND AGN IN BARRED GALAXIES

방준,안홍배 한국지구과학회 2009 한국지구과학회지 Vol.30 No.1

We investigate the dependence of star formation rate and Active Galaxy Nuclei (AGN) frequency on the bar properties, especially the bar strength, using SDSS DR6. To better represent the bar strength, we divided the bars into 6 classes according to their length and axial ratios. There seems to be a fairly good correlation between the star formation rate derived from Hα emission lines and the bar strength, whereas there is no apparent correlation between the AGN activity and the bar strength. We interpret that the former correlation is due to the dependence of bar-driven gas inflow on the strength of bar. The lack of correlation between AGN and bar properties suggests that the accretion of gas onto a supermassive black hole(SMBH) is regulated by the interplay between the bar and SMBH. The frequency of AGN seems to be dependent on the background density but the star formation rate does not. It suggests that star formation is a localized phenomenon that is mostly determined by the gas density in a galaxy, while AGN activity is more closely related to the host property such as mass and luminosity that are thought to be dependent on the environment through the density-luminosity relation.

시뮬레이션 모델을 활용한 인천국제공항 수용량 산정에 관한 연구

방준,김도현 한국항공운항학회 2019 한국항공운항학회지 Vol.27 No.1

To prepare for the ever-increasing demand for air transport, airport operators should be well aware of the timing of the saturation of the facility and increase the capacity of the airport through extension or extension. The capacity of an airport is determined by the smallest value of the facilities that make up the airport, but it is generally customary to determine the capacity of the costly and time-consuming runway as a whole for the airport. For analyzing the capacity of the runway capacity, the study used the most accurate microscopic air traffic simulation, Simmod-PRO, to analyze the saturation time of three runways currently in Incheon International Airport’s operation, and calculate the appropriate time for operation of the 4th runway. The study also calculate the relocation of Airport’s high-speed exit taxiway for analyzing the increasing of capacity.

영어자유대화에서 대학생들의 의사소통전략에 대한 분석 연구

방준 새한영어영문학회 2012 새한영어영문학회 학술발표회 논문집 Vol.2012 No.10

초등 영어 교사의 단기 해외 연수에 대한 인식 변화 연구 : K도 초등 연수 참가 교사를 중심으로

방준 한국언어과학회 2013 언어과학 Vol.20 No.4

The purpose of the paper is to explore the way in which Korean English teachers at an elementary level experienced a teacher training program in the U.S. Five in-service elementary school teachers participated in this study through in-depth individual interviews, writing journals, Skype interviews, as well as classroom observations. As the result of data analysis, Korean English teachers had transformed attitudes toward the program in the U. S. Before joining the program, they did not originally expect much from the program. As the program went by, they became satisfied not only with the improvement of their language proficiency, but with the understanding of English language and cultures. Unfortunately, they felt sorry that they did not have enough opportunities to practise speaking in English. Also, they complained that the program in the U.S. did not have enough understanding about Korean English teachers and their needs. Nevertheless, they could build their own confidence in their teaching through the experience in the U.S. At the same time, they worried about the gap between what they have learned in the U.S. and what they would teach in Korea. In conclusion, this paper investigates the pedagogical implications in regards to teachers' overseas intensive training program.

PSO를 이용한 다수의 대상에 대한 랑데부 최적화

방준,안재명 한국항공우주학회 2015 한국항공우주학회 학술발표회 논문집 Vol.2015 No.11

본 논문에서는 랑데부해야 하는 대상이 여러 개인 경우, 각각의 대상에 차례대로 어느 시각에, 어떤 경로를 따라 이동해야 총 속도증분량을 최소화 할 수 있을지 결정하는 최적화 문제를 정의하였다. 랑데부 전략으로는 multiple-revolution Lambert rendezvous를 이용하였으며, 설계변수는 각각의 대상에서의 대기시간과 궤도천이시간으로 설정하였다. 서로 다른 개수의 대상을 가지는 몇 가지 case에 대해 Particle Swarm Optimization(PSO) 알고리즘을 이용하여 최적 해를 구하였으며, 각 경우의 PSO 성능을 비교하였다. An optimal problem of rendezvous with multiple target is defined in this paper. The purpose of optimization is to find the overall trajectory having the minimal velocity increment for orbital rendezvous. The multiple-revolution Lambert rendezvous is selected as an orbital rendezvous strategy. The design variables are the combinations of waiting time and transfer time at each target. Particle swarm optimization is used to find the optimal solution of several cases including different number of targets.

예비영어교사의 유아교육학과 유아영어교육과정에 대한 인식 연구

방준 한국언어과학회 2012 한국언어과학회 학술대회 Vol.2012 No.02

한영혼용 스토리텔링 영어캠프의 초등영어 어휘학습 효과 : 어휘능력 향상의 정의적, 인지적 효과 연구

방준 현대영미어문학회 2015 현대영미어문학회 춘계학술대회 발표논문집 Vol.2015 No.-

국내 영어 교육 분야에서의 비판적 사고 관련 연구 동향

방준 한국영어교과교육학회 2019 영어교과교육 Vol.18 No.4

The purpose of this study was to analyze the trends on critical thinking studies of English education in domestic. For this, 43 papers related to critical thinking of English education for 19 years from 2000 to 2018 were collected from RISS, KISS, DBPIA, NDSL, National Library of Korea, National Assembly Library, National Digital Library. The papers were analyzed according to six standards such as the date of research, publication type, subject, research methodology, research theme and purpose of study. The key-words extracted from the abstract were analyzed by utilizing key-word network analysis methods namely NetMiner. The results showed that the studies on critical thinking of English education have increased steadily centered around university students. In the early 2000’s, studies that focused on ‘critical thinking’ and ‘critical reading’ were developed in various ways such as ‘writing, speaking’ and ‘discussion.’ In the key-word network analysis, ‘critical thinking’ as centered key-word frequency, and key-words ‘critical literacy,’ ‘critical reading,’ ‘critical pedagogy,’ ‘college student’ and ‘writing class’ were the primary key-words. Based on these results, it was suggested that more research on critical thinking of English education reflecting more various age groups and language skills be necessary.

부모들의 자녀 영어 학습 참여에 대한 고찰: 미국 체류 한국인 부모들을 중심으로

방준 현대문법학회 2013 현대문법연구 Vol.71 No.-

This study explores the way in which Korean parents involve in the development of their children's English language while they stay in the U.S. to improve the children's English abilities. 10 parents participated in this study through free discussion, E-interview, E-journal, and in-depth interview. The research finds that the parents play three roles involved with their children's English language development. First, the parents, as helpers, participate in their children's English study in direct or indirect ways. Second, they, as mediators, help their children build the relationship with their peers and teachers. Lastly, they place an emphasis not only on second language learning, but on their mother tongue to preserve their children's identities and to help their children continue to study in their own country, Korea. When they are ready to return to Korea, the parents are concerned about their children's continuous practice in English. The results of the study will offer pedagogical implications to parents who have children planning to study abroad and teachers to instruct students who finish studying abroad.

항공교통시물레이션(Simmod-Pro)을 활용한 인천국제공항 공항 수용량에 대한 연구

방준,김도현 한국항공경영학회 2018 한국항공경영학회 추계학술대회 Vol.2018 No.-

우리나라에서 가장 많은 항공기가 이·착륙하는 인천국제공항은 항공수요량이 연 평균 약 6%대의 꾸준한 상승률을 보여주고 있다. 공항의 처리능력을 가늠할 수 있는 활주로의 연간용량 산정은 공항계획 수립을 위한 필수적인 작업이다. 본 연구에서는 공항의 연간용량 산정을 위해 미시적 항공교통시뮬레이션(Simmod)을 활용하여 활주로를 이용하는 항공기의 평균 지연시간을 측정하고, 이를 기준으로 인천국제공항 활주로의 일일용량을 산출, 분석하여 최종적으로 연간용량을 산정하는 방법을 소개하였다. 이러한 방법으로 인천국제공항의 일일용량 및 연간용량 분석 결과, 하루 약 1,272회, 연간 약 446,472회로 산정되었으며, 증가하는 항공교통량을 고려한 제 4활주로의 적절한 완공 시기는 2021년 전후로 산출되었다.