• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.05a
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• pp.158-161
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• 2002

We investigated whether controlled dynamization enhanced regenerative bone healing of the tibia in 12 adult mongrel dogs. An average of 2 cm (∼ 10% of bone length) lengthening was obtained. The left hindlimb was allowed dynamization of 1 mm, 2 mm, and 3 mm in magnitude when 1 cm (∼ 5%) of lengthening was achieved, whereas the right hindlimb was not dynamized and served as a control. Bone mineral density (BMD) of the regenerative bone was measured periodically until nine weeks after the end of distraction. After sacrifice, uniaxial compression testing was performed. Relative BMD ratio and

• Journal of the Korean Society of Safety
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• v.13 no.4
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• pp.155-161
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• 1998

Recently, there are widely needs of small scale electrostatic precipitator(ESP) in machine shop and other factories. Since the space of such factories is limited, the improvement of collection efficiency is predominant subject. In this study, we examine the influence of distribution of wind velocity and oil mist concentration inside the ESP in order to improve the performance of the ESP. The distribution of wind velocity and mist concentration is measured respectively in a cross-sectional plane of the ESP. The former is controlled by using a louver which is placed in front of an ionizer and the latter is controlled by lengthening the pipe of entrance of the ESP in order to have plenty of time that mist is dispersed evenly. It is shown that the uniformity of distribution of wind velocity and mist concentration inside the ESP can be getting by adopting a louver with proper shape and lengthening the pipe of entrance and is also contributed to collection efficiency considerably.

• Journal of Korean Foot and Ankle Society
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• v.18 no.3
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• pp.93-99
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• 2014

Acquired adult flatfoot deformity is characterized by flattening of the medial longitudinal arch and dysfunction of the posteromedial soft tissues, including the posterior tibial tendon. When the non-operative treatment fails to result in improvement of symptoms, surgery should be considered. Operative techniques include flexor digitorum longus tendon transfer, calcaneal medial slide osteotomy, lateral column lengthening, and arthrodesis of the hindfoot. The principle of correcting the deformity while avoiding overcorrection and excessive stiffness is important in achievement of good outcomes in these patients.

• MALSORI
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• no.35_36
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• pp.13-24
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• 1998

This study aims at examining the relationship between tonal events and their related vowel and syllable duration in Korean. Two things were investigated: one is to see if there is a hierarchical relationship in prosodic unit-final-lengthening and the other is to see if accentual phrase initial high tone syllable gets lengthened. Generally, higher prosodic units show larger degree of lengthening of the final vowel and also final syllable duration than the lower ones except for accentual phrase: Mean duration of utterance-final or intonational-phrase-final syllable(and its vowels) was longer than that of accentual-phrase-final or word-final syllable(and its vowels). However, mean duration of accentual phrase final syllable was shorter than that of word final syllable. Mean vowel duration of accentual phrase initial high tone syllable was shorter than that of any other prosodic unit. Its mean syllable duration, however, was longer than that of accentual-phrase-final or word-final syllable, indicating that strong consonants(fortis and aspirated) frequently appear in the accentual phrase initial position and this position is a prosodically strong position showing longer duration as well as high tone.

• Journal of English Language & Literature
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• v.55 no.6
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• pp.1139-1161
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• 2009

This paper deals with the reduction of unstressed prevocalic /u/ and the appearance of /w/ which are observed in such words as ambiguity [ˌæm bǝ ˈgju: ǝ ti] - ambiguous [æm ˈbɪ gjǝ wǝs]. This phenomenon is recorded in Merriam-Webster Online Dictionary, Webster's Third New International Dictionary, Unabridged, and the draft revisions of Oxford English Dictionary Online. Since this phenomenon has not been studied in detail up to now, this paper aims 1) to collect the data related to the reduction of unstressed prevocalic /u/, 2) to classify them systematically, and 3) to explain the phenomenon in terms of Optimality Theory. In the course of analysis, Prevocalic Lengthening, which is crucial to the preservation of unstressed prevocalic /u/, is reinterpreted as one of the ways to prevent hiatus (annual /æ nju: ǝl/). /w/-insertion is another way to prevent hiatus (annual /æ njǝ wǝl/). In addition it is argued that prevocalic /u/ behaves differently from prevocalic /i/ due to the difference in the articulators involved.

• Phonetics and Speech Sciences
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• v.13 no.2
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• pp.37-44
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• 2021

Preliminary findings are reported from five experiments testing the perceived naturalness of word tokens whose vowel durations are altered. The stimuli were minimal pairs of English words ending in a voiced/voiceless plosive. Results show an asymmetric effect of shortening and lengthening of the vowel on the perceived naturalness of the word. Incremental shortening of vowel duration initially shows a stable degree of perceived naturalness but rapidly deteriorates beyond a certain point. On the contrary, only a small degree of lengthening of the vowel made the perceived naturalness of the word quickly decay, but there was a floor effect such that the perceived degree of naturalness does not lower beyond a certain level. Further, the tokens with the original vowel duration were not always scored higher than the stimuli with a small degree of shortening. Future studies should address the issue of speaking rate and the ratio between the vowel and the stop closure duration to better understand the phenomenon. The issue investigated here has implications on the role of prototypical exemplars in the perception of phonotactic naturalness.

• Journal of the Korean Academy of Esthetic Dentistry
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• v.20 no.1
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• pp.14-26
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• 2011

• 대한치주과학회:학술대회논문집
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• 2009.05a
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• pp.37-37
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• 2009

• 대한치주과학회:학술대회논문집
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• 2003.11a
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• pp.135-135
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• 2003

• Journal of the Korean Society for Marine Environment & Energy
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• v.14 no.1
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• pp.32-39
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• 2011

When the laws about the security of ships are revised, or voyage conditions are changed, ship owners have converted rather than built new passenger ships including cruise ships recently. As conversion causes a lot of changes in principal dimension, structural strength, hydrodynamic performance, the number of passengers, and cargo capacity, detailed pre-review is needed. But any studies on conversion have not been carried out yet, this study investigated and analyzed the trend of consulting companies' reports (Delta Marine Report, 2005, 2008). As a result, it was found that lengthening conversion brought about the main changes in principal dimension, and performance. Also it was suggested that there be factors for consideration like hull scantling, hull form, and cutting point to minimize side effects when ship owners build ships having lengthening conversion in mind.