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Sooting 및 Non-Sooting 정상 확산 화염에서 생성되는 매연 입자의 특성에 대한 연구
최인철,이재복,황정호,Choi, In-Chul,Lee, Jae-Bok,Hwang, Jung-Ho 대한기계학회 2000 大韓機械學會論文集B Vol.24 No.7
Characteristics of carbon soot particles generated in diffusion flames were studied. Non-sooting and sooting normal diffusion flames using propane or ethylene as fuel were selected. In the flames, soot volume fraction was measured by a thermocouple, and primary particle diameter and cluster size were analyzed by TEM photographs. The characteristics of soot particles depended on flame(non-sooting or sooting) and fuel(propane or ethylene) type. Unlike the sooting diffusion flames, particle growth and oxidation processes were clearly observed in the non-sooting diffusion flames. In the sooting diffusion flames, soot particle size was slightly changed at the flame tip.
최인철(In cheol Choi) 현대문법학회 2018 현대문법연구 Vol.98 No.-
The Korean double nominative construction shows many characteristics distinguished not only from subjectobject clauses but also from nominative complement constructions. Specifically, the initial NP of the construction exhibits properties that are attributed to a subject in terms of object to subject raising and caki binding. Embracing the traditional ideas such as Major Subject and the sentential predicate (Park 1981, Yoon 2004), the initial NP of the construction is suggested to be predicated by a sentential predicate. Therefore, in this approach, the NP is considered a grammatical relation that exists in addition to the subject, i.e., sentential specifier. This paper also shows how the proposal is neatly dealt with by Sign-Based Construction Grammar (Boas and Sag 2012).
통계기법을 이용한 공공하수처리시설의 운영실태 평가방법 연구
최인철 ( In Cheol Choi ),안태웅 ( Tae Ung Ahn ),유순주 ( Soon Ju Yu ),정현미 ( Hyen Mi Chung ),권오상 ( Oh Sang Kwon ),김원기 ( Won Ky Kim ),염익태 ( Ick Tae Yeom ),손대희 ( Dae Hee Son ) 한국물환경학회 2014 한국물환경학회지 Vol.30 No.5
Korea has been trying to manage water quality of rivers and lakes in many ways. Ministry of Environment is making continuous efforts of operation control improvement such as strengthening effluent standards in sewage treatment plants and expanding Tele-Monitoring System (TMS). However, evaluation method for operations of sewage treatment plants and establishment system of effluent standards are inadequate. The objective of this study is to evaluate for operations of sewage treatment plants using statistics technique such as frequency analysis, percentile, normal distribution analysis. We used the effluent data (BOD, COD, SS) collected at 299 plants in 2012. The values were very low by comparison with standards. The Data followed a normal distribution. We think that distribution characteristics are closely related with effluent standards, especially T-P and BOD. Statistics technique attempted in this study can be used to evaluate for operations of sewage treatment plants and assess the appropriateness of effluent standards based on TBEL(Technology-based effluent limitation). And, this technique can be used to figure out the overall level of plants, the status of each plant and the favorable treatment process for each item (BOD, COD etc.). Data acquired through this method can be used to improve facilities and operation techniques and decide on a sewerage policy.
최인철 ( In Cheol Choi ) 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.51 No.5
Several clinical studies suggest substantial limitations of currently available positive inotropic substances, including beta1-adrenoceptor agonists and phosphodiesterase III inhibitors. Levosimendan, a myofilament calcium sensitizer with inotropic effects, increases myocardial performance without substantial changes in oxygen consumption and with neutral effects on heart rhythm. In addition, levosimendan has vasodilatory effects that are achieved by stimulation of adenosine triphosphate-dependent potassium channels. This review article briefly discusses the pharmacology of levosimendan and evaluates current available evidence to assess the safety and efficacy of levosimendan. (Korean J Anesthesiol 2006; 51: 519~27)
최인철(I. C. Choi),심상욱(S. O. Shim),김성남(S. N. Kim),선종호(J. H. Sun) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.11
본 연구에서는 고압전동기 고정자권선 진단데이터 분포특성 연구에 관하여 논하고 있다. 현장의 여러 환경에서 사용된 고압전동기 고정자 권선 절연진단데이터를 수집하였으며 와이블 해석을 통하여 사용환경에 따른 평균값을 산출하였다. 비교분석결과 제작사별로 전체의 진단항목 중 최대 11배의 차이가 났으며, 부하종류별 비교에서는 최대 2.5배의 차이가 발생하였음을 알 수 있었다.
음성 인식 기술을 활용한 채점자 엄격도 반영 및 유창성 측정 타당성
최인철(Choi Inn-Chull) 한국외국어교육학회 2004 Foreign languages education Vol.11 No.2
Serious inherent problems with practicality, intra-rater and inter-rater reliability overshadow the known positive washback effects of performance assessment in language education. In particular, it has been welldocumented that inter-rater reliability poses a serious threat to overall test validity, since individual raters necessarily measure performance according to their own subjective severity criteria in language proficiency. However, language testing has witnessed a remarkable series of breakthroughs in performance assessment during the recent advent of the information era. One such breakthrough utilizes state-of-the-art automatic speech recognition (ASR) technology for oral proficiency interviews(OPI). Granting that current forms of ASR technologies may not produce results with the reliability needed to accommodate highstakes standardized test administration, they do offer aid in approaching the thorny issues of practicality and inherent human inter-rater subjectivity. Accordingly, this paper is intended to investigate the degree to which ASR-based OPI ratings match similar human-conducted OPI ratings by employing correlational analyses on the basis of degrees of rater severity. Furthermore, this paper attempts to explore a method of enhancing the robustness of ASR-based OPI ratings which capitalizes on suprasegmental information by measuring fluency based principally on the test-takers’ response time length.