http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
최재혁,B. C. Choi,S. M. Lee,S. H. CHUNG,K. S. Jung,W. L. Jeong,S. K. Choi,S. K. Park 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.5
In order to investigate the effect of DME mixing on the number density and size of soot particles, DME was mixed in a counter flownon-premixed ethylene flame with mixture ratios of 5%, 14% and 30%. A laser extinction/scattering technique has been adopted tomeasure the volume fraction, number density, and mean size of soot particles. The experimental results showed that the highest soot concentrationswere observed for flames with mixture ratios of 5% and 14%; however, for a mixture ratio of 30% the soot concentrationdecreased. Numerical results showed that the concentrations of propargyl radicals (C3H3) at the 5% and 14% ratios were higher thanthose measured in the ethylene-based flame, and the production of benzene (C6H6) in the 5% and 14% DME mixture flames was alsoincreased. This indicates the crucial role of propargyl in benzene ring formation. These reactions generally become stronger with increasedDME mixing, except for A1 + H2 → A1 + H (-R554) and n-C4H5 + C2H2 → A1 + H (R542). Therefore, it is indicated that addingDME to ethylene flames promotes benzene ring formation. Note that although the maximum C6H6 concentration is largest in the 30%DME mixing flame, the soot volume fraction is smaller than those for the 5% and 14% mixture ratios. This is because the local C6H6concentration decreases in the relatively low temperature region in the fuel side where soot growth occurs.
A Note on Initial Fricative Voicing in Southern Old English
최재혁 한국중앙영어영문학회 2013 영어영문학연구 Vol.55 No.3
The purpose of this research is to investigate one of the lenition processes, especially voicing phenomenon in (southern) Old English. The voicing of initial fricatives as shown in the southern and south-western dialects of Old and Middle English, which has generally been regarded as a phonological progression in those regions between two periods (Nielsen 1994: 19), is well known among English historical phonologists and philologists, and has long been discussed in the discourse of both historical and theoretical phonology. In the present paper, we have examined various aspects of the voicing of initial fricatives in OE. For example, OE consonant system is reviewed by showing that the phonemicization of voiceless/voiced fricatives are demonstrated in detail. Furthermore, it is shown that voiceless fricatives in initial position had been replaced by voiced ones since the voicing of initial fricatives in OE is originally motivated by intervocalic environment between words or sentences. In addition, I suggest that a theoretical approach to this phenomenon should throw new light on the unsloved problems (e.g. lenition and position).
파인더 속의 실험국가 - 일본의 전위사진과 보도사진이 표상한 만주국 -
최재혁 동국대학교 일본학연구소 2023 일본학 Vol.60 No.-
This paper focuses on Japanese photographers in the period of 1930s and 1940s, including those who resided in Manchuria, and analyzes their views on and activities in Manchukuo through two conceptual frames of ‘avant-garde’ and ‘experimentation.’ Japan’s artistic and political vanguards at the time both envisioned Manchuria to be a place where they could realize their own desires. And in the process, Manchukuo became a “geopolitical avant-garde” (as in the words of NAMIGATA Tsuyoshi) that spearheaded in the nation’s war against the West, ahead of the mainland (main unit). Attitudes of Japanese photographers against the state could also be understood in this context. Artistic vanguards in photography were those avant-garde photographers from the mainland Japan (naichi) who travelled to Manchuria for their work, as well as Japanese photographers residing in Manchuria who also pursued avant-gardist expressions through their photography of “plasticity” (zōkei shashin). There were subtle differences in their pursuits, but they both viewed Manchukuo as a place to spread the idea of ‘surreal in everyday life’ and experiment with ‘cutting-edge expressions’ that befit the new state. In case of political avant-garde, originally represented by Marxist and leftist thoughts that had already dissipated in the wartimes, the spirit was succeeded by nationalism and fascism. Photo journalists who followed such political avant-garde headed to Manchukuo,“the front line of the motherland,” and assumed the role of transmitting the latest information to the main force, to the people of Japan. However, even to these photographers, Manchuria was not only a place for political propaganda and communication duties, but also a place for applying and disseminating their own photographic theories and techniques-experimenting with kumi shashin (editing or construction of multiple photographs in order to express a story or an issue of interest) and up-to-date methods of Russian avant-garde photography, while training amateur photographers. In this way, in the eyes of Japanese photographers of the time, Manchukuo was a space for various experimentations entangled with blurred purposes andborders of artistic and political avant-garde. 「신천지」로서의 이미지가 넘친 만주국은 제국 일본 지식인, 예술인들이 각자 유토피아를 기획한 기회의 땅이기도 했다. 그들이 폐색 상황에 있던 본토에 비해 어느 정도 자유로운 실험과 자신의 이론 적용이 가능한 장소 또는 ‘타불라 라사’로서 만주국을 인식하고 있었던 것은 틀림없다. 만주국이 정치적으로는 문제를 안고 있더라도 전위적 건축가들에게는 전시통제 하의 일본에서는 불가능한 계획을 실험할 수 있는 장으로 여겨졌던 것이다. 자유로운 실험이 가능한 만주국이라는 이미지는 당시 건축가뿐만 아니라 문예 전반의 공통된 경향이었다. 「가상국가(도시)로서의 만주국」을 마음껏 계획한 것이 건축영역이었다고 말한다면, 「파인더 속의 실험국가」를 자유자재로 모색한 것이 사진영역이었다고 할 수 있다. 특히 전위사진과 보도사진에 있어 만주는 실험실로서 적극적으로 인식되었다. 본고에서는 만주국과 일본 근대 사진과의 관계를 다루면서 「전위」와 「실험」이라는 개념에 주목해 보았다. 최근 아방가르드 연구에서는 「지정학적 전위」로서 만주국을 위치짓는 시점이 제기되고, 만주국이 예술적 전위와 정치적 전위, 쌍방에 있어 신천지였음이 밝혀져 왔다. 본고에서 본 만주사진은 그것을 단적으로 담아낸 절호의 자료이며, 다양한 전위의 입장과 시선이 교차하고 얽힌 것을 확인했다. 내지의 전위사진가와 재만일본인 전위(조형) 사진가들은 스스로의 「새로움」, 즉 「일상 속의 초현실」과 「신국가에 상응하는 첨단(=조형)」을 적용, 실험하는 장소로서 만주를 ”발견”했다. 그리고 보도사진가 또한 「조국의 최일선」이 된 「만주의 전위」에 서 그 정보를 「본대」인 일본을 향해 발신한 이른바 만주는 이중의 아방가르드였던 것이다.
최재혁,김윤현,김진영 한국인터넷방송통신학회 2010 한국인터넷방송통신학회 논문지 Vol.10 No.2
본 논문에서는, 802.22 WRAN 시스템과 DTV 사이의 주파수 공존 영향에 대해 분석한다. 먼저 간섭에 대한 정의를 명확히 하기위해, DTV를 간섭원으로, 802.22 WRAN을 피 간섭원으로 설정한다. 두 시스템이 동일한 스펙트럼을 사용했을 때, 두 시스템의 최소 이격 거리를 계산한다. 그리고 잠재적 간섭의 존재 유무를 결정하기위해, 최소 커플링 손실을 전송 손실과 비교하였다. 최소 이격거리는 전송 손실이 최소 커플링 손실보다 큰 값을 가질 경우 결정된다. 이러한 경우, DTV는 802.22 WRAN 시스템에 아무런 영향도 끼치지 않는 것으로 생각할 수 있다. In this paper, we analyze an effect co-existence between digital television (DTV) and 802.22 wireless regional area network (WRAN) systems. We set DTV as an interfering system and 802.22 WRAN as a victim system. When they share the same spectrum, we calculate the minimum separation distance. In analysis, we compare a minimum coupling loss (MCL) with a transmission loss (TL) for determining whether there exists the potential interference or not. The minimum separation distance is determined when the TL is larger than the MCL. In this case, the DTV system does not affect any harmful effect to 802.22 WRAN.
불완전 분할 III형 내이 기형을 가진 환자의 와우이식 결과
최재혁,이규엽,임은정,이상흔 대한이비인후과학회 2009 대한이비인후과학회지 두경부외과학 Vol.52 No.6
Background and Objectives:Among inner ear anomaly, incomplete partition type III is a quite rare finding which has pathognomonic computerized tomographic finding with bilateral, dilatation of lateral end of internal auditory canal, and deficient or absent bone between internal auditory canal and the basal turn of cochlea. Patients with incomplete partition type III have various range of hearing impairment and in case of severe hearing loss which cannot get benefit from hearing aids, cochlear implantation is indicated. In cochlear implantation for incomplete partition type III, perilymph gusher and abnormal electrode position is highly cautioned. We analyzed cochlear implantation patients with incomplete partition type III to find common intra-operative finding and complication. Subjects and Method:Temporal bone computerized tomographies of 120 patients who received cochlear implantation between September, 2002 and March, 2008 in our hospital were reviewed:the imaging of 4 patients were consistent with typical incomplete partition type III. We reviewed intra-operative finding and postoperative complications along with hearing outcome. Results:During the operation, perilymph gusher was encountered in all cases, and it was tightly sealed with subcutaneous tissue and fat with fibrin glue. In patient 1, electrodes were abnormally positioned in IAC causing facial nerve stimulation. However, the result of postoperative speech perception was good in the patient, and in the rest of patients, the results were various. Conclusion:The surgeon should be aware of perilymph gusher when cochlear implantation is performed on patients with characteristic temporal bone computerized tomographic findings and who are suspicious of incomplete partition type III.