플라즈마 절단면 특성이 서브머지드 아크용접 용락 현상에 미치는 영향에 관한 연구

김정태(Jeongtae Kim),정효민(Hyomin Jeong),지명국(Myoungkuk Ji),정한식(Hanshik Chung) 한국마린엔지니어링학회 2013 한국마린엔지니어링학회지 Vol.37 No.6

대진대학교 M&HV 연구실 소개

김정태(Jeongtae Kim),윤성호(Sungho Yoon) 대한전기학회 2021 전기의 세계 Vol.70 No.5

조선해양 구조물 주판의 Butt welding joint 수축에 관한 연구

김정태(Jeongtae Kim),이대철(Daechul Lee),정효민(Hyomin Jeong),정한식(Hanshik Chung) 한국마린엔지니어링학회 2013 한국마린엔지니어링학회지 Vol.37 No.5

‘바위(岩)’의 통시적 변화와 방언 분포상의 특징

김정태(Kim Jeongtae) 한국언어문학회 2009 한국언어문학 Vol.70 No.-

This study is to examine the diachronic changes of paü(rock) and the distribution of paü's dialect forms. One of the internalized foci of this study is whether the results from the study on the changes and characteristics of a single word, paü can be generalized as a solid consequence. Therefore, to secure universality and generalization of the study, there should be common characteristics found in other words. However, archaic words were found in old books are very helpful to assume the origin of paü', and it can be clues to trace back the procedure of paü's diachronic changes. Since the completion of Hunminjeongeum(The Correct/Proper Sounds for the Instruction of the People), because paü appeared very frequently in Eonhae(諺解) literature, dialects, and geographical names, a glimpse and review on the diachronic changes and distribution characteristics of paü can be taken referring to those materials. In the old native folk song, Heonhwaga, ‘…岩乎’ was read as paho, and assuming the phonological history of /k/, the origin form of rock, pako and pakvy were reconstructed. The physiologically developed form, pakvy was found in the old geographical name' references like Samguksagijirigi. The pakvy meant a 'rock' or 'hill', so it is clear the word had been used as polysemy and homonymy. With the meaning differentiation, the meaning of hill, pakvy was developed as kokƐ(<kokay) and pakvy itself was used only to mean a 'rock'. This form was changed to pahoy in the period of the completion of Hunminjeongeum, and transformed again to pau in modern ages. The phonological phenomena such as /k/ weakening, deletion, and vowel raising were applied in the historical process. As the forms of pau's dialect, various forms such as paü, pauy, pagu, pau, pao, paŋgu, paŋu, phagu, phaŋgu, phaŋu, pai were realized. Each dialect form shows some kind of distribution characteristics with the monophthongization (the conversion of diphthongs to monophthongs), the first letter's aspiration, the addition of /ŋ/ sound and so on. For example, the monophthongization of uy>u was realized across the country except the dialect in the midland part, and the dialects with an archaic /k/ appeared in the southwestern, southeastern, and northeastern dialects. Furthermore, the southeastern and northeastern dialects wer characterized with the /ŋ/ sound addition. Through a series of the phonological phenomena such as vowel raising, the monophthongization, /k/ sound weakening and deletion, the comparative study between midland dialects and non-midland dialects can be performed and generalized consequence will be drawn. In conclusion, the diachronic changes of paü(rock) and the distribution characteristics of paü's dialects were involved with Korean phoneme history and phonological phenomena like the /k/ weakening and deletion, the o>u vowel raising, the monophthongization, the aspiration, /ŋ/ sound addition and so on. This study proved characteristic dialect distribution and its results will be applied to classify the existing dialect areas as well.

에지 위치 추정을 통한 이진 파형의 복원

金廷泰(Jeongtae Kim) 대한전기학회 2006 전기학회논문지 D Vol.55 No.7

We have proposed an image restoration method for a bi-level waveforms whose number of edges is known to us. Based on the information, we parametrize a bi-level waveform using the locations of edges and restore the waveform by estimating the parameter. We estimated the locations by maximizing the correlation coefficients between the bi-level waveform and the measured waveform. In experiments using two dimensional barcode images of the PDF417 specification, the proposed method showed better performance than conventional methods in the sense that the proposed method was able to decode barcode images that were not decoded by the conventional methods.

반복 semi-blind 워너 필터링을 이용한 이진영상의 복원

金廷泰(Jeongtae Kim) 대한전기학회 2008 전기학회논문지 Vol.57 No.7

We present a novel deblurring algorithm for bi-level images blurred by some parameterizable point spread function. The proposed method iteratively searches unknown parameters in the point spread function and noise-to-signal ratio by minimizing an objective function that is based on the binariness and tile difference between two intensity values of restoring image. In simulations and experiments, the proposed method showed improved performance compared with the Wiener filtering based method in terms of bit error rate after segmentation.

능동 클램프 회로를 적용한 전류 유입형 푸쉬풀 저전압 DC-DC 컨버터

김정태(Jeongtae Kim),전선우(Seonwoo Jeon),배성우(Sungwoo Bae),김현빈(Hyunbin Kim),김종수(Jong-Soo Kim) 전력전자학회 2016 전력전자학술대회 논문집 Vol.2016 No.7

Gradient 방향을 고려한 허프 변환을 이용한 직선 검출 방법

金廷泰(Jeongtae Kim) 대한전기학회 2007 전기학회논문지 Vol.56 No.1

We have proposed a novel line detection method based on the estimated probability density function of gradient directions of edges. By estimating peaks of the density function, we determine groups of edges that have the same gradient direction. For edges in the same groups, we detect lines that correspond to peaks of the connectivity weighted distribution of the distances from the origin. In the experiments using the Data Matrix barcode images and LCD images, the proposed method showed better performance than conventional methods in terms of the processing speed and accuracy.

충남방언 ‘X]vst + 어요’의 음운론

김정태(Kim Jeongtae) 한국언어문학회 2010 한국언어문학 Vol.75 No.-

This study explores a phonological study of ‘X]vst + eoyo(어요)’ in Chungnam Dialect. Dialtects of four regions including Gongju, Cheonan, Boryeong, and Taean are realized as [-yu] with long sound ending, which are represented as Chungnam dialect. In fact, this is caused the mechanism of vowel raising from ‘o → u’. In addition, ‘X]vst + eoyo(어요)’ dialects are different based on whether its final word is vowel or consonant. Also, it is confirmed that there are two types of Chungnam dialect according to region. Thus, the purpose of this study is to discover what are phonological mechanisms which operate realization of those dialects. First, ‘[-u]’ is represented as Chungnam diatect among ‘X]vst + eoyo(어요)’dialects. Second, this Chungnam diatect can be categorized into two largely based on whether final word is vowel or consonant. Third, it is confirmed that there are two dialects according to region within those two categorization, or inland region such as Gongju․Cheonan regional dialect and west coastal region dialects such as Boryeong․Taean regional dialect. Forth, in case of integrated type which has a vowel in word final + ‘-eoyo’, a variety of phenomena are observed in two regions. One is that there is ‘-eo’ deletion in common in word final vowels such as ‘a, eo, ae, e, oe’. The other is that gliding is realized on the condition that word final vowel ‘o/u and I’ are integrated with ‘-eoyo’ in dialect of inland area (Gongju․Cheonan), which is a typically middle area dialect. However, replacement and deletion are realized due to expansion of vowel raising rules, ‘eo → eu’, in case that ‘-eoyo’ is integrated with word final vowel with condition of gliding. Irregular conjugation of ‘s (ㅅ) and b (ㅂ)’ experienced this realization too. Another example can be found in the case of word final vowel ‘eu’ where realization of Gongju․Cheonan shows variation of ‘-eo’, two vowels on word final, as in ‘kkeu + eoyo → kkeoyu’ like middle area dialect. On the contrary, Boryeong․Taean regional dialect shows variation of ‘-eo’, two vowels on word final, as in ‘kkeu + eoyo → kkeuu’. This tendency of realization in the case of integration type in word final vowel + ‘-eoyo’ is about the same in the integration of ‘-eoya’. Finally, various phenomena are provided depending on two regions in the case of integration type such as word final consonant + ‘-eoyo’. One is that Chungnam dialect in word final consonant + ‘-eoyo’ is realized as ‘[-u]’ in common, showing regional difference subject to the types of consonants. Another is that when word final consonant of inland area (Gongju․Cheonan) is integrated with ‘-eoyo’, it is prolonged except final consonant ‘ss’, which is a common middle area dialect. Additionally, when word final bilabials and ‘-eoyo’ are integrated in west region (Boryeong, Taean), they experience replacement due to the expansion of vowel raising rules in ‘eo → eu’ and even vowel rounding in ‘eu → u’. Also, in the case of word final alveolar, hard palate, and soft palate, variation in ‘eo →eu’, voluntary vowel fronting in ‘eu →i’, and deletion of same sound are realized. Yet, a distinctive dialects are observed where mutation in ‘eo →eu’, ‘eu → i’, and deletion of same sound are applied throughout Chungnam area In the case of ‘ss’ among alveo fricatives in stem final. In addition, ‘h (ㅎ)’, consonant in stem final is classified as dialect of stem final vowel as it is deleted in the process of integration with ‘-eoyo’.

〈속보논문〉 영상 공간에서의 연결성 기반 가중치 누적을 통한 코너점 검출 : 이차원 바코드 검출에의 응용

金廷泰(Jeongtae Kim),宋振永(Jinyoung Song) 대한전기학회 2007 전기학회논문지 Vol.56 No.10

We propse a novel corner detection algorithm for locating 2D Data Matrix barcode in an image. The proposed method accumulates weight for each cross point defined by every combination of edge points in the image, and detects the comer point of the barcode L-pattern by determining the location of the highest accumulated weight. By designing the weight considering the connectivity of two lines around the cross point, we were able to detect the comer of L-pattern even for the cases that the lines of L-patterns are short. In the experiments, the proposed method showed improved performance compared with the conventional Hough transform based method in terms of detectability and computation time.