• 대한음성언어의학회:학술대회논문집
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• 대한음성언어의학회 2003년도 제19회 학술대회
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• pp.170-173
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• 2003

There are more than five systems for transcribing English vowels. Because of this diversity, teachers of English and students are confronted with not a little problems with the English vowel symbols used in the English-Korean dictionaries, English text books, books for Phonetics and Phonology. This study was designed to suggest criterions for the phonemic transcription of English vowels on the basis of phonetic properties of the vowels and a system of English vowel transcription based on the criterions in order to minimize the problems with inter-system differences. A speaker (phonetician) of RP English uttered a series of isolated minimal pairs containing the vowels in question. The suggested vowel symbols are as follows: 1) Simple vowels : /i:/ in beat, /I/ bit, /$\varepsilon$/ bet,/${\ae}$/ bat, /a:/ father, /Dlla/ bod, /$\jmath$:/ bawd, /u/ put, /u:/ boot /$\Lambda$/ but, and /$\partial$/ about /$\Im$:ll$\Im$:r/ bird. 2) Diphthongs : /aI/ in bite, /au/ bout, /$\jmath$I/ boy, /$\Im$ullou/ boat, /er/ bait, /e$\partial$lle$\partial$r/ air, /u$\partial$llu$\partial$r/ poor, /i$\partial$lli$\partial$r/ beer. Where two symbols are shown corresponding to the vowel in a single word, the first is appropriate for most speakers of British English and the second for most speakers of American English.

• 음성과학
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• 제10권4호
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• pp.73-79
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• 2003

There are more than five systems for transcribing English vowels. Because of this diversity, teachers of English and students are confronted with not a little problems with the English vowel symbols used in the English-Korean dictionaries, English text books, books for Phonetics and Phonology. This study was designed to suggest criterions for the phonemic transcription of English vowels on the basis of phonetic properties of the vowels and a system of English vowel transcription based on the criterions in order to minimize the problems with inter-system differences. A speaker (phonetician) of RP English uttered a series of isolated minimal pairs containing the vowels in question. The suggested vowel symbols are as follows: (1) Simple vowels: /i:/ in beat, /I/ bit, /$\varepsilon$/ bet, /${\ae}$ bat, /a:/ father, /Dlla/ bod, /c:/ bawd, /$\upsilon$ put, /u:/ boot /$\Lambda$/ but, and /e/ about /$\varepsilon:ll3:r$/ bird. (2) Diphthongs: /aI/ in bite, /a$\upsilon$/ bout, /cI/ boy, /3$\upsilon$llo$\upsilon$/ boat, /eI/ bait, /eelleer/ air, /uelluer/ poor, /iellier/ beer. Where two symbols are shown corresponding to the vowel in a single word, the first is appropriate for most speakers of British English and the second for most speakers of American English.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 춘계학술대회 논문집
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• pp.623-624
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• 2005

Micro injection molding is a branch of micro system technology and has been under development for the mass manufacture of micro parts. Enhanced technological products like micro optical devices are entering the market. This paper presents fundamental research on the injection molding technique in micro fabrication. In order to successful manufacturing of micro plastic parts, it is necessary to research for development of micro-injection machine, machining of micro mold, decision of optimum injection conditions and the research for polymer material. Therefore in this study, in order to machining of micro mold, a mold core with microscopic V-shaped groove was tooled by ultra-precise tooling machine. The transcription experiments with a polymer, PMMA resin on the surface of core with Ni plating were carried out and surface profile of injected parts was measured with AFM.

• 대한치과교정학회지
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• 제14권1호
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• pp.39-45
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• 1984

10years and 8 months old patient, who had been wearing Milwaukee brace for 5 months, was treated by multibanded system without extract on. She complianed severe protrusion and interdental spacing of upper anterior teeth. Cephalometric analysis revealed short anterior facial height, infraclusion of the lower first molars and severe profrusion of upper and lower anterior teeth. During orthodontic treatment Milwaukee brace was replaced by TLSO, so the orthopedic force on the dentofacial region was eliminated. After 2 years and 3 months, she gained raised bite, increased interincisal angle, salient reduction in the protrusion of upper central incisals with agreeable overjet, complete obliteration of interdental spacing and reduction of protrusion of upper and lower lips.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2010년도 춘계학술대회
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• pp.775-778
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• 2010

본 논문에서는 초미세 패턴($24{\mu}m$ 이하의 선폭, $30{\mu}m$ 이하의 피치)을 가진 칩-온-필름(Chip-on-Film, COF)에 발생한 결함을 자동으로 검출할 수 있는 시스템을 제안한다. 개발된 시스템은 COF 패턴으로부터 대표적으로 발생하는 결함들, 즉 개방(open), 단락(hard short), mouse bite(near open) 및 near short(soft short)을 자동으로 신속히 검출할 수 있는 기술이 적용되어 있다. 특히 초미세 패턴의 경우, near open 및 near short과 같은 결함 검출이 불가능한 기존 검출시스템의 문제점을 극복한 기술이 제안되어 있다. 본 논문에서 제안하는 결함 검출 원리는 미세 선의 결함유무에 따른 저항 변화를 자동으로 검출하고, 그 미세한 변화를 좀 더 자세하게 판별하기 위해 고주파 공진기(resonator)를 적용하고 있다. 제안된 시스템은 미세 패턴을 가진 COF 제작 과정에서 발생한 결함을 신속히 검출할 수 있기 때문에 COF 불량 검사에 소요되는 많은 경비를 줄일 수 있으리라 기대한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 하계학술대회 논문집 A
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• pp.313-315
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• 2004

최근의 전력선통신(PLC: Power Line Communication)은 협대역인 450KHz에서 광대역인 30MHz로 확대되어 고속의 데이터 전송이 가능하게 되었다[1]. 본 논문에서는 광대역 채널특성과 더불어 고속의 데이터 전송까지 가능하도록 하기 위해 새로운M-ary SS(spread spectrum) 기반의 고속 전력선통신시스템을 제시하고 임펄스잡음과 같은 전력선 채널환경 하에서의 BER(Bite Error Rate)특성에 대한 모의실험을 거쳐서 제안 방식의 유용성을 확인하였다

• Journal of Oral Medicine and Pain
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• 제26권1호
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• pp.59-73
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• 2001

This study was performed to investigate the effects of occlusal appliance on the mandibular position and the mandibular rotational torque movement during speech. For this study, 20 patients with temporomandibular disorders(TMDs) and 20 normal subjects without any signs and symptoms in the masticatory system were selected as the patient group and as the normal group, respectively. Biopak $system^{(R)}$(Bioresearch Inc., Milwaukee, USA) and a sentence of 'Sue is missing her house' were used for recording and for observing of speech pattern. There were five mandibular positions observed in this study, that is, mandibular rest position, 'ssi', 'her', 'ha', and 's' speech position. In each position, slant and A-P distance in sagittal plane, vertical distance and lateral distance in frontal plane were measured. Amount of the mandibular rotational torque movement were measured at 'her', 'ha' speech position and for all through speech movement. Centric relation splint(CRS) was placed in both groups, but anterior or posterior bite plane were placed in normal subjects only. Data collected were processed and analysed by SPSS windows program. The results of this study were as follows : 1. Mandibular positions in both groups were not different before adaptation, with CRS, and after removal, but total amount of the mandibular rotational torque movement was greater in patients. 2. Mandible was slightly placed anteriorly with CRS at 'her' and 'ha' speech position in patients, but was placed anteriorly at all the five positions in normal subjects. 3. Difference with type of occlusal appliance in normal subjects were noted only for vertical distance at 'ssi' and 'ha' speech position, and the distance with CRS were more than that with posterior bite plane. 4. Mandibular rotational torque movement at 'her' and 'ha' speech position was greater in patients, but the difference was disappeared after appliance removal. And the torque movement was greater at 'ha' speech position than that at 'her' speech position in frontal plane. It could be concluded that the adaptation of occlusal appliance showed a tendency to locate the mandible anteriorly during speech in both groups, but did not affect total mandibular rotational torque movement which was greater in patients.

• 한국생산제조학회지
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• 제8권3호
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• pp.92-99
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• 1999

The inspection unit which is developed and used in this study, is processed the shape data from the CCD camera to seek welding bite section shape, and then calculated as a real dimension from measuring the value of each inspection item. The reason of measuring with the real in this study is came out from the image method which used for a long time, which is extricated the characteristic as the dimension of pixel by recognize pixel. The measurement method of the section shape is that we decide the thresholding value after we drew the histogram to binarizate the object. After that, we make flat the object to get rid of the noise and measure the shape of welded part through the boundarization of the object. The shape measurement is that measure the value of the welding part to adapt the actual operation program from using the ratio between the actual dimension of the standard specimen and the dimension of image, to measure the ratio between the actual product and the camera image. The inspection algorithm which estimates the quality of welded product is developed and also, the software GUI(Graphic User Interface) which processes the automatic test function of the inspection system is developed. We make the foundation of the inspection automatic system and we will help to apply other welding machine.

• 정보저장시스템학회:학술대회논문집
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• 정보저장시스템학회 2005년도 추계학술대회 논문집
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• pp.119-123
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• 2005

We report the random pattern characteristics of the super resolution near field structure(Super-RENS) write once read-many(WORM) disc at a blue laser optical system(laser wavelength 405nm, numerical aperture 0.85) and the Super-RENS read only memory(ROM) disc at a blue laser optical system(laser wavelength 659nm, numerical aperture 0.65). We used the WORM disc of which carrier-to-noise ratio (CNR) of 75nm is 47dB and ROM disc of which carrier-to-noise ratio (CNR) of 173nm is 45dB. We controlled the equalization (EQ) characteristics and used advanced partial-response maximum likelihood (PRML) technique. We obtained bit error rate (bER) of 10-3 level at 50GB WORM disc and bite error rate of 10-4 level at 50GB level ROM disc. This result shows high feasibility of Super-RENS technology for practical use.

• 한국지능시스템학회논문지
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• 제11권9호
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• pp.833-836
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• 2001

공장 자동화 및 무인 자동화를 실현하기 위해 가장 기본적이며 중요한 기술은 제조공정에 대한 감시 기술이다. 특히 절삭공정에서 생산성을 향상시키기 위해서는 절삭 과정 중 드릴이나 앤드밀 등과 같은 공구의 마모상태가 실시간으로 감시되어야 한다. 본 논문은 드릴 공정에서 퍼지 논리를 도입하여 마모진단 시스템을 구성하였다. 실시간 마모진단을 위해서 절삭력과 절삭력의 변화량을 퍼지 입력 변수로 하여 컴퓨터를 이용한 드릴의 마모상태를 판단하는 알고리즘을 제안하였다. 제안된 퍼지 마모진단 시스템을 평가하기 위하여 퍼지 마모량과 드릴의 실제 마모량을 측정하여 그 결과를 비교하였다.