http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
정환승,염동일 한국광학회 2017 Current Optics and Photonics Vol.1 No.3
We report a passive Q-switching of an all-fiber erbium-doped fiber laser delivering high pulse energyby using a high quality single-walled carbon nanotube saturable absorber (SWCNT-SA). A side-polishedfiber coated with the SWCNT is employed as an in-line SA for evanescent wave interaction between theincident light and the SWCNT. This lateral interaction scheme enables a stable Q-switched fiber laser thatgenerates high pulse energy. The central wavelength of the Q-switched pulse laser was measured as 1560nm. A repetition rate frequency of the Q-switched laser is controlled from 78 kHz to 190 kHz by adjustingthe applied pump power from 124 mW to 790 mW. The variation of pulse energy from 51 nJ to 270nJ is also observed as increasing the pump power. The pulse energy of 270 nJ achieved at maximumpump power is 3 times larger than those reported in Q-switched all-fiber lasers using a SWCNT-SA. Thetunable behaviors in pulse duration, pulse repetition rate, and pulse energy as a function of pump powerare reported, and are well matched with theoretical expectation.
정환승 한국외국어대학교 동남아연구소 2007 東南亞硏究 Vol.17 No.1
In this study, we aim to examine the overall state of the Korean wave (the phenomenon of the remarkable popularity of Korea’s pop culture), as well as Korean language education in Thailand, and to seek ways to improve the Korean language education based on the recognition and interest in Korean pop culture by professors and students who are majoring in the Korean language. Beginning in early 200s, the Korean wave and Korean language education in Thailand grew in significance, so much that the Thai’s interest in learning the Korean language can be considered a major part of the Korean wave itself. However, its quantitative growth has not been coupled with qualitative growth and improvement in educational methods. Due to the influence of the Korean wave, many Thai students choose to study the Korean language for economic reasons, aside from their interest in the Korean culture. However, it is a fact that there is a shortage of educators specializing in Korean language education, and the professional knowledge and diversity of expertise of professors are also big problems to overcome. In addition, there are few materials available for the textbook‐based teaching and learning of Korean. Thailand’s government is not trying to strengthen the qualifications of Korean language professors. In accordance with this measure, Thailand’s government should also maintain their support in cultivating more professors who can ably teach the Korean language. Moreover, it should provide support as much as it can, especially in terms of providing textbooks and the development of learning materials. The Korean wave remains the greatest motivation for many students to select the Korean language as their major, and the Korean pop culture can also be a good learning tool. Accordingly, it is therefore important to find effective means to integrate the elements of the Korean wave in the teaching of the Korean language. Korean organizations that are related to Korean language education should maintain a close relationship with Thailand’s government and university authorities, so that policies covering Korean language education can independently and ably develop in Thailand.
정환승 한국태국학회 2015 한국태국학회논총 Vol.21 No.2
In this study, a comparative analysis was conducted on the onomatopoeias of the Korean and the Thai. The results show that Korean onomatopoeias have the most plosives, followed by affricates, and fricatives, and have extremely few nasals or assonants. Also, usual sounds and tense sounds are many and strong sounds are relatively few. The Thai language also has the most plosives, followed by fricatives, and relatively few affricates and assonants. However, Thai language was found to have far more tense sounds than strong sounds. In the distribution of onomatopoeias of the Korean language, there are many onomatopoeias with two syllables and four syllables, whereas the Thai language have the most onomatopoeias with one syllable. It appears to be because the pure Thai is a single syllable language made up of one syllable. When onomatopoeias are classified according to the object that makes sound, the two languages all have the most sounds made by things, followed by the sounds made by humans, but the sounds made by animals or nature are relatively very few. In the case of the Korean, the prefix consonants are classified into usual sounds, tense sounds, and strong sonds, and through these sounds, strong and weak nuances are expressed, and more diverse nuaces can be expressed acoording to consonant repalacement. Also, through final consonants, diverse nuance expressions according to the kinds of consonants can be made. Vowels are also classified into positive vowels and negative vowels, and through the vowel replacement, diverse nuances such as big and small, strong and weak, heavy and light, wide and anarrow can be expressed. In the case of the Thai, different nuances according to the properties of consonants can be expressed, and in the case of vowels, nuance expressions such as big and small, heavy and light can be expressed through vowel replacement in the dialects of some regions.