영어 듣기평가의 영국발음 사용에 대한 교사 의견 조사 연구

박태준 ( Park Taejoon ) 한국중등영어교육학회 2017 중등영어교육 Vol.10 No.3

This study aimed to seek secondary school teachers` opinions on issues of including British pronunciation in listening assesment currently being administered to secondary school students twice a year. For the purpose of this study, in-depth interviews were conducted with 39 English teachers from across the country. The results of the present study revealed that a majority of secondary schools have been using the nationwide listening assessment as a substitute for listening performance assessment at the classroom level. Specifically, according to the English teachers interviewed in this study, the results of the nationwide listening assessment are reflected in their students` report cards as part(e.g., 10 to 20%) of performance assessment scores. When asked about their opinions about including British pronunciation in listening assessment, most teachers agreed with the rationale behind using British pronunciation in listening assessment. Some teachers, however, expressed their concerns about this practice because it could lead to extra burden on the part of their students. Based on the results of this study, some suggestions on what needs to done to alleviate those teachers` concerns were made.

기존 환경관련 표준서의 연소 계산법 검토 및 수정 제안

박태준(Taejoon Park),하우석(Woo-seok Ha),조현석(Hyun-Seok Cho),이창언(Chang-eon Lee) 한국연소학회 2022 KOSCOSYMPOSIUM논문집 Vol.2022 No.11

상태방정식을 이용한 주유소 탱크에서의 유증기 배출량 산정법에 관한 연구

박태준(Taejoon Park),오휘성(Wheesung Oh),이창언(Chang-Eon Lee) 한국연소학회 2015 한국연소학회지 Vol.20 No.4

This study was investigated the estimation of VOCs (Volatile Organic Compounds) emission from a gas station tank. To improve the atmosphere environmental quality near the gas station, the installation of vapor recovery system has been expanded recently. Therefore, it was necessary to calculate VOCs emissions from the gas station tank with vapor recovery systems for evaluation of their performance. The VOCs emissions are difficult to measure directly because of various sources and irregularly emission by pressure rise. In this study, VOCs emissions were estimated by simple calculation based on the equation of state for measured pressure, temperature and volume of a gasoline tank at a gas station. The result confirmed that the present national emission factor did not have significant discrepancy with the calculated value.

이중 선회연소기의 화염모드와 Emission에 관한 연구

박태준(Taejoon Park),황철홍(Cheolhong Hwang),이기만(Keeman Lee) 한국연소학회 2013 KOSCOSYMPOSIUM논문집 Vol.2013 No.12

Emission characteristics and flame modes of the dual swirl combustor for a micro-gas turbine were investigated experimentally. This burner showed 5 kinds of flame mode that had from low swirl flame to single flame mode. In this study, emissions according to the heating value were measured by gas analyzer in each mode. To investigate correlation of between NOx and heat release, CH* chemiluminescence images were also acquired by ICCD camera with an optic filter. The result showed that the pilot swirl angle 15˚ produced more NOx emissions compared to the 30˚ and 45˚ for the condition of fixed main swirl angle, which are confirmed to the distribution of high CH* chemiluminescence intensity at the flame base.

이중선회 연소기의 화염모드 연구

박태준(Taejoon Park),황철홍(Cheolhong Hwang),이기만(Keeman Lee) 한국추진공학회 2013 한국추진공학회 학술대회논문집 Vol.2013 No.12

마이크로 가스터빈용 이중 선회 제트 연소기에서 화염모드에 대한 실험연구가 수행되었다. 고정된 메인 선회각도에서 발열량 및 파일럿 선회기의 각도가 주요변수로 검토되었다. 주요한 결과로써 발열량과 파일럿 선회각도에 변화는 전체적인 화염의 유동면적 및 재순환 유동패턴을 변화시켜, 이로 인하여 화염모드 및 선회강도에서 중대한 변화를 나타냈다. 본 연구에서는 주요변수들에 따라 화염모드를 총 5가지로 정의하였다. 또한 주요변수들에 따른 배기성능은 파일럿과 메인의 상호 작용에 의해 현저하게 달라지는 것을 확인하였다. A flame mode of the dual swirl jet combustor for a micro-gas turbine was investigated experimentally. Variation of input heating value and angle of pilot swirler were varied as main parameters under the condition of fixed main swirl angle. The results showed that variation in pilot swirl angle and input heating value resulted in significant change in flame mode and swirl intensity due to the changes in recirculating flow pattern and flow area of overall flame. The five kinds of flame mode were defined in this study with respective to the main parameters. It was also observed that the emission according to main parameters varied by the interaction of between pilot and main.

기존 연소계산법 검토 및 새로운 연소계산법 고찰

박태준(Taejoon Park),이창언(Chang-eon Lee) 한국연소학회 2023 KOSCOSYMPOSIUM논문집 Vol.2023 No.5

An Investigation into the Variability of a Writing Test Using Generalizability Theory

Taejoon Park(박태준) 한국외국어교육학회 2008 Foreign languages education Vol.15 No.1

Because performance assessment such as a composition test introduces a range of factors that may influence the chances of success for a candidate on the test, those in charge of monitoring quality control for performance assessment programs need to gather information that will help them determine whether all aspects of the programs are working as intended. In the present study, generalizability theory (Brennan, 1992) was employed to examine the relative effects of various sources of variability on students" performance on an essay writing test and also to investigate the reliability of the assigned scores. The results showed that due to the largest effect associated with the students" writing ability and negligible effects associated with facets of measurement such as scoring criteria and ratings, the generalizability coefficient estimated for the writing test was high, suggesting that the test is a reliable measure of what it purports to measure, the students" writing ability.

고등학교 영어평가 관련 이슈에 대한 교사들의 의견 조사 연구

박태준 ( Park Taejoon ),장재학 ( Chang Jaehak ) 한국중등영어교육학회 2016 중등영어교육 Vol.9 No.4

This study aimed to seek high school English teachers` opinions on various issues related to classroom assessment in secondary school in Korea. For the purpose of this study, in-depth interviews were conducted with 21 high school English teachers from across the country. The results of the present study revealed that government`s assessment policies such as College Scholastic Ability Test (CSAT) have tremendous impact on English education at the classroom level. This calls for the need to consider including items directly assessing students` productive skills (i.e., speaking and writing) in the English section of CSAT, given the expected positive washback effect on classroom practice. Another noteworthy point is that implementing speaking performance assessment in secondary school is considered difficult by many teachers due to some inherent issues associated with scoring students` speaking performance (e.g., issues of reliability). Based on the results of this study, some suggestions on what needs to done to facilitate communicative English education in secondary school were made.

아날로그 하드웨어 에뮬레이션 플러그-인들의 고조파 비교를 통한 에뮬레이션 충실도에 대한 정량적 분석 연구

박태준(Park, Taejoon),장민호(Chang, Minho) 한국문화산업학회 2017 문화산업연구 Vol.17 No.2

본 연구는 제한조건(制限條件)의 환경에서 실제 아날로그 하드웨어와 이를 복각한 소프트웨어 에뮬레이션 플러그-인의 음향적 특성에 대하여 에뮬레이션의 근본적인 요소 중에 하나인 고조파 왜곡 현상에 대해 비선형 회귀 분석을 통하여 여러 에뮬레이션 플러그-인들의 에뮬레이션 충실도를 알아보는 것에 연구목적을 두고, 그 결과에 따라 어느 플러그-인이 가장 유사한 특징을 보이는 지를 규명한다. 분석 대상 하드웨어로는 컴프레서와 리미터 역사상 초기 모델인 LA-2A를 선정하여 특정한 다수의 파형 데이터를 하드웨어 LA-2A와 이를 복각한 개발사별 소프트웨어 LA-2A 에뮬레이션 플러그-인들에 동일하게 통과시켜 DAW로 녹음한 후, 스펙트럼 분석을 통해 고조파 왜곡 현상의 발생과 그 결과를 파악하고 이를 활용하여 에뮬레이션 충실도를 도출하는 절차로 진행되었다. 분석 결과, LA-2A 에뮬레이션 플러그-인들의 사용에 있어서 음역대별 가장 유사한 FF(Fidelity Factor) 값을 가지는 플러그-인을 사용하는 것이 적절하다는 것을 확인하였다. 연구 결과, 에뮬레이션 플러그-인에 대한 무조건적 신뢰는 지양해야하며 개발사의 입장에서도 잠재 소비자들의 사용 및 구매의향을 높이기 위해서는 보다 더 충실하면서도 저비용적 특성을 살린 에뮬레이션 방법을 통하여 에뮬레이션의 퀄리티를 향상시켜야 할 필요가 있다는 사실을 확인하였다. This paper focuses on analyzing harmonic distortion phenomenon, which is essentially the fundamental acoustic factor of real-world analog hardware and their software emulation counterpart, to measure the fidelity of emulation from several different software plug-ins with varying manufacturers through quantitative analysis. This paper aims to determine the fidelity of emulation of given plug-in software implementations through non-linear regression analysis of results from harmonic distortion spectra, within specific limiting conditions, and investigates which plug-in presents the most similar trait to the original hardware with fidelity factor rank. In this research, specific audio samples were implemented equally on signal processing hardware and corresponding software. The results were recorded using DAW to compare generated harmonic distortion spectra of each hardware and software. The results were then applied to numerical analysis software and evaluated through linear regression analysis. The hardware selected is LA-2A which led to wide range of progressive research and extensive investigation regarding the compressor. As the result of analysis, using plug-ins which show similar FF(Fidelity Factor) for each frequency range was found to be appropriate. Therefore, we should refrain from putting blind trust on an LA-2A emulation plug-in, and as for the developers, overall improvement of the quality of emulation accompanying low cost, and fidelity-centric methodology is a necessity to promote the use and purchase of them for potential customers. 본 연구는 제한조건(制限條件)의 환경에서 실제 아날로그 하드웨어와 이를 복각한 소프트웨어 에뮬레이션 플러그-인의 음향적 특성에 대하여 에뮬레이션의 근본적인 요소 중에 하나인 고조파 왜곡 현상에 대해 비선형 회귀 분석을 통하여 여러 에뮬레이션 플러그-인들의 에뮬레이션 충실도를 알아보는 것에 연구목적을 두고, 그 결과에 따라 어느 플러그-인이 가장 유사한 특징을 보이는 지를 규명한다. 분석 대상 하드웨어로는 컴프레서와 리미터 역사상 초기 모델인 LA-2A를 선정하여 특정한 다수의 파형 데이터를 하드웨어 LA-2A와 이를 복각한 개발사별 소프트웨어 LA-2A 에뮬레이션 플러그-인들에 동일하게 통과시켜 DAW로 녹음한 후, 스펙트럼 분석을 통해 고조파 왜곡 현상의 발생과 그 결과를 파악하고 이를 활용하여 에뮬레이션 충실도를 도출하는 절차로 진행되었다. 분석 결과, LA-2A 에뮬레이션 플러그-인들의 사용에 있어서 음역대별 가장 유사한 FF(Fidelity Factor) 값을 가지는 플러그-인을 사용하는 것이 적절하다는 것을 확인하였다. 연구 결과, 에뮬레이션 플러그-인에 대한 무조건적 신뢰는 지양해야하며 개발사의 입장에서도 잠재 소비자들의 사용 및 구매의향을 높이기 위해서는 보다 더 충실하면서도 저비용적 특성을 살린 에뮬레이션 방법을 통하여 에뮬레이션의 퀄리티를 향상시켜야 할 필요가 있다는 사실을 확인하였다. This paper focuses on analyzing harmonic distortion phenomenon, which is essentially the fundamental acoustic factor of real-world analog hardware and their software emulation counterpart, to measure the fidelity of emulation from several different software plug-ins with varying manufacturers through quantitative analysis. This paper aims to determine the fidelity of emulation of given plug-in software implementations through non-linear regression analysis of results from harmonic distortion spectra, within specific limiting conditions, and investigates which plug-in presents the most similar trait to the original hardware with fidelity factor rank. In this research, specific audio samples were implemented equally on signal processing hardware and corresponding software. The results were recorded using DAW to compare generated harmonic distortion spectra of each hardware and software. The results were then applied to numerical analysis software and evaluated through linear regression analysis. The hardware selected is LA-2A which led to wide range of progressive research and extensive investigation regarding the compressor. As the result of analysis, using plug-ins which show similar FF(Fidelity Factor) for each frequency range was found to be appropriate. Therefore, we should refrain from putting blind trust on an LA-2A emulation plug-in, and as for the developers, overall improvement of the quality of emulation accompanying low cost, and fidelity-centric methodology is a necessity to promote the use and purchase of them for potential customers.

The flexible routing with flex for the fast delivery

TaeJoon Park(박태준),Yerim Chung(정예림) 한국컴퓨터정보학회 2021 韓國컴퓨터情報學會論文誌 Vol.26 No.9

본 논문의 목적은 빠른 배송을 위한 배송 차량의 유연 회차와 크라우드쉬핑(Crowd Shipping) 배달원인 플렉스를 활용한 “유연 회차와 플렉스” 방식을 제안하고, 풀이 알고리즘을 제안하는 것이다. 알고리즘은 선행 연구에서 성능이 검증된 2-opt를 사용하여 차량 경로를 계산하고, 절약 휴리스틱(Saving heuristic)을 변형한 방식으로 플렉스에 할당할 고객을 계산한다. 알고리즘은 차량과 플렉스를 분리하는 것이 아니라, 상호 보완적으로 운용될 수 있게 한다. 이를 위해 차량 정보가 플렉스 할당 과정에 고려되도록 하였다. 본 연구의 실험은 다양한 도심지의 상황을 상정한 Random, Mixed, Cluster 인스턴스로 구성되었다. 실험 결과 모든 인스턴스에서는 플렉스의 사용이 차량 유연 회차의 효율성을 높여주는 것을 확인하였다. 또 플렉스와 배송 지연 시간 비용에 대한 민감도분석에서는 “유연 회차와 플렉스”가 차량만을 사용하는 방식의 차량 대수에 따라 값에 차이를 보였지만, 플렉스 비용이나 배송 지연 시간 비용이 200% 증가하는 경우에도 우위를 유지하는 것을 확인하였다. 본 연구의 결과는 플렉스가 차량과 연계되어 활용되는 경우, 플렉스에 의해 서비스되는 고객뿐만 아니라 차량으로 서비스되는 고객들의 서비스 품질을 높일 수 있음을 보여준다. In this paper, we propose “flexible routing with flex” to provide fast delivery by using the flexible routing for the delivery vehicle and crowd-shipper named flex. To this end, we have introduced an algorithm that can build the delivery plan for delivery vehicles and flexes. The introduced algorithm uses the 2-opt algorithm to construct routes with low complexity and acceptable quality, and the revised saving algorithm to assign customer orders to the flex. The algorithm allows the vehicle and the flex to function complement each other without separating the delivery vehicle from the flex. The experiments consider the 3 different instances named Random, Mixed, Cluster, and show that “the flexible routing with flex” has a better result than “vehicle only”. The sensitivity analysis of the flex cost and time penalty shows “the flexible routing with flex” can provide better service not only to the customers who are serviced by flex but also to the customers who are serviced by the delivery vehicle.