7 research outputs found

    ๊ณจ๊ฒฉ์„ฑ III๊ธ‰ ๋น„๋Œ€์นญ ํ™˜์ž์—์„œ similarity index๋ฅผ ์ด์šฉํ•œ ์ปดํ“จํ„ฐ ๊ธฐ๋ฐ˜์˜ ํ•˜์•…๊ณจ ์ ˆ๋Œ€์  ์ •์ค‘์‹œ์ƒ๋ฉด์˜ ์„ค์ • ์ œ์•ˆ

    No full text
    This study sought to test the feasibility of a newly developed plane called computed modified absolute mandibular midsagittal plane (cmAMP) based on the similarity index (SI) for evaluating the stereoscopical symmetry of the mandible by comparison with other proposed midsagittal planes. This study involved 29 adult patients (15 men, 14 women; average age, 23.1 ยฑ 6.9 years) with skeletal Class III facial asymmetry who underwent bimaxillary orthognathic surgery. Using cone-beam computed tomography images taken before and 1 year after surgery, cmAMP with the highest SI value between the two anterior segments of the hemi-mandible was set by a computer algorithm. Results show that the SI using cmAMP had the highest value (0.83 ยฑ 0.04) before vi surgery compared to the other midsagittal planes, and was not significantly different from the SI (0.80 ยฑ 0.05) using a facial midsagittal plane (MSP) after surgery. The distance (1.15 ยฑ 0.74 mm) and angle (2.02 ยฑ 0.82ยฐ) between MSP and cmAMP after surgery were significantly smaller than those between MSP and other midsagittal planes. In conclusion, the cmAMP plane best matches the two anterior segments of hemi-mandible symmetrically and is the closest to MSP after orthognathic surgery in skeletal Class III patients with facial asymmetry. With cmAMP, it will maximize the symmetry of the mandible after surgery and reduce the need for additional surgery such as bone graft, mandible contouring, and chin osteotomy(genioplasty). It will also be useful to create surgical guides during actual surgical planning and simulation by grafting cmAMP into 3D software. ๋ณธ ์—ฐ๊ตฌ๋Š” ํ•˜์•…๊ณจ์˜ ์ž…์ฒดํ•™์ ์ธ ๋Œ€์นญ์„ฑ์„ ํ‰๊ฐ€ํ•˜๊ธฐ ์œ„ํ•ด ์œ ์‚ฌ๋„ ์ง€์ˆ˜(similarity index, SI)๋ฅผ ์ด์šฉํ•˜์—ฌ ์ปดํ“จํ„ฐ ๊ธฐ๋ฐ˜์˜ ํ•˜์•…๊ณจ ์ ˆ๋Œ€์  ์ •์ค‘์‹œ์ƒ๋ฉด(computed modified absolute mandibular midsagittal plane, cmAMP)์„ ์„ค์ •ํ•œ ํ›„ ๊ธฐ์ค€ ํ‰๋ฉด์œผ๋กœ์„œ์˜ ์œ  ํšจ์„ฑ์„ ์ž…์ฆํ•˜๊ณ ์ž ํ•˜์˜€๋‹ค. ์ด ์—ฐ๊ตฌ๋Š” ์•…๊ต์ • ์ˆ˜์ˆ ์„ ๋ฐ›์€ ์•ˆ๋ฉด ๋น„๋Œ€์นญ์„ ๋™๋ฐ˜ํ•œ ๊ณจ ๊ฒฉ์„ฑ III๊ธ‰ ๋ถ€์ •๊ตํ•ฉ์œผ๋กœ ์ง„๋‹จ๋ฐ›์€ 29๋ช…์˜ ์„ฑ์ธ ํ™˜์ž (๋‚จ์„ฑ 15๋ช…, ์—ฌ์„ฑ 14๋ช…, ํ‰๊ท  ์—ฐ๋ น 23.1ยฑ6.9์„ธ)๋ฅผ ๋Œ€์ƒ์œผ๋กœ ํ•˜์˜€๋‹ค. ์ˆ˜์ˆ  ์ „๊ณผ ์ˆ˜์ˆ  1๋…„ ํ›„์— ์ดฌ์˜ํ•œ ์ฝ˜๋น” ์ „์‚ฐํ™” ๋‹จ์ธต์ดฌ์˜ (cone-beam computerized tomography; CBCT) ์˜์ƒ์„ ์‚ฌ์šฉํ•˜์—ฌ ํ•˜์•…๊ณจ ์˜ ์ขŒยท์šฐ ์ „๋ฐฉ ๋ถ„์ ˆ ์‚ฌ์ด์—์„œ ๊ฐ€์žฅ ๋†’์€ SI ๊ฐ’์„ ๋ณด์ด๋Š” cmAMP๋ฅผ ์ปดํ“จํ„ฐ ์•Œ๊ณ ๋ฆฌ ์ฆ˜์œผ๋กœ ์„ค์ •ํ•˜์˜€๋‹ค. ์ˆ˜์ˆ  ์ „ cmAMP๋ฅผ ๊ธฐ์ค€ ํ‰๋ฉด์œผ๋กœ ์‚ฌ์šฉํ•˜์—ฌ ๊ตฌํ•ด์ง„ ํ•˜์•…๊ณจ์˜ ์ขŒยท์šฐ ์ „๋ฐฉ ๋ถ„์ ˆ ์‚ฌ ์ด SI ๊ฐ’์€ ๋‹ค๋ฅธ ์ •์ค‘์‹œ์ƒ๋ฉด์— ๋น„ํ•ด ๊ฐ€์žฅ ๋†’์€ ๊ฐ’(0.83ยฑ0.04)์„ ๋ณด์˜€์œผ๋ฉฐ, ์ˆ˜์ˆ  ํ›„ ์•ˆ๋ฉด ์ •์ค‘์‹œ์ƒ๋ฉด (facial midsagittal plane, MSP)์„ ๊ธฐ์ค€์œผ๋กœ ๊ตฌํ•œ SI ๊ฐ’(0.80ยฑ0.05) ๊ณผ ์œ ์˜ํ•œ ์ฐจ์ด๋ฅผ ๋ณด์ด์ง€ ์•Š์•˜๋‹ค. ์ˆ˜์ˆ  ํ›„ MSP์™€ cmAMP ์‚ฌ์ด์˜ ๊ฑฐ๋ฆฌ(1.15ยฑ0.74 mm)์™€ ๊ฐ๋„(2.02ยฑ0.82 ยฐ)๋Š” MSP์™€ ๋‹ค๋ฅธ ์ •์ค‘์‹œ์ƒ๋ฉด ์‚ฌ์ด์—์„œ ๊ณ„์‚ฐํ•œ ์ˆ˜์น˜๋ณด๋‹ค ์œ ์˜ํ•˜๊ฒŒ ์ž‘์•˜๋‹ค. ๋ณธ ์—ฐ๊ตฌ์˜ ๊ฒฐ๊ณผ๋ฅผ ํ† ๋Œ€๋กœ cmAMP๋Š” ๊ธฐ์ค€ ํ‰๋ฉด์œผ๋กœ์„œ ํ•˜์•…๊ณจ์˜ ์ขŒยท์šฐ ์ „๋ฐฉ ๋ถ„์ ˆ ์„ ๋Œ€์นญ ์ ์œผ๋กœ ๊ฒน์ณ์ง€๊ฒŒ ๊ตฌ๋ถ„ํ•  ์ˆ˜ ์žˆ๊ณ , ์ด ํ‰๋ฉด์ด ์•ˆ๋ฉด ๋น„๋Œ€์นญ์„ ๋™๋ฐ˜ํ•œ ๊ณจ๊ฒฉ์„ฑ III๊ธ‰ ๋ถ€์ •๊ตํ•ฉ์„ ๋ณด์ด๋Š” ํ™˜์ž์—์„œ ์•…๊ต์ • ์ˆ˜์ˆ  ํ›„์˜ MSP์™€ ๊ฐ€์žฅ ๊ฐ€๊น๊ฒŒ ์ผ์น˜ํ•˜์˜€๋‹ค. ๋”ฐ๋ผ์„œ cmAMP๋ฅผ ํ†ตํ•ด ์ˆ˜์ˆ  ํ›„ ํ•˜์•…๊ณจ์˜ ๋Œ€์นญ์„ฑ์„ ์ตœ๋Œ€ํ™”ํ•˜๋ฉฐ ๊ณจ ์ด์‹, ์‚ฌ๊ฐํ„ฑ์ˆ˜์ˆ , ํ„ฑ๋์ˆ˜์ˆ  ๋“ฑ๊ณผ ๊ฐ™์€ ์ถ”๊ฐ€ ์ˆ˜์ˆ ์˜ ํ•„์š”์„ฑ์„ ์ค„์ผ ์ˆ˜ ์žˆ์„ ๊ฒƒ์ด๋ฉฐ, cmAMP๋ฅผ 3์ฐจ์› ์†Œ ํ”„ํŠธ์›จ์–ด์— ์ ‘๋ชฉํ•œ๋‹ค๋ฉด ์‹ค์ œ ์ˆ˜์ˆ  ๊ณ„ํš ์ˆ˜๋ฆฝ ๋ฐ ์‹œ๋ฎฌ๋ ˆ์ด์…˜ ์‹œ์— ๊ฐ€์ด๋“œ๋ฅผ ์ œ์ž‘ํ•˜๋Š” ๋ฐ ์œ ์šฉํ•  ๊ฒƒ์ด๋‹ค.open๋ฐ•

    A Study on Movement and Interaction of Monads

    No full text
    ๊ฒฝํ—˜๋ก ๊ณผ ๋Œ€๋น„๋˜๋Š” ์˜๋ฏธ์—์„œ ๊ทผ๋Œ€ ํ•ฉ๋ฆฌ๋ก ์œผ๋กœ ๋ถ„๋ฅ˜๋˜๋Š” ๋ฐ์นด๋ฅดํŠธ, ์Šคํ”ผ๋…ธ์ž, ๋ผ์ดํ”„๋‹ˆ์ธ ์˜ ์ฒ ํ•™์— ์žˆ์–ด '์‹ค์ฒด(ๅฏฆ้ซ”, subtance)'๋ผ๋Š” ๊ฐœ๋…์€ ๋ง ๊ทธ๋Œ€๋กœ ์–ด๋– ํ•œ ๊ฐ€์ƒ, ํ˜น์€ ๋น„๋ณธ์งˆ์ ์ธ ๊ฒƒ ๋“ฑ, ์‹ค์ฒด๊ฐ€ ์•„๋‹Œ ๊ฒƒ์„ ๋Œ€๋ฆฝํ•ญ์œผ๋กœ์„œ ์ „์ œํ•œ๋‹ค. ๊ณ ๋Œ€ ๊ทธ๋ฆฌ์Šค์—์„œ๋ถ€ํ„ฐ ๋‚ด๋ ค์ ธ ์˜ค๋Š” ์„œ๊ตฌ ์ง€์„ฑ์‚ฌ ์†์—์„œ์˜ ์ด๋Ÿฌํ•œ ๋ฟŒ๋ฆฌ ๊นŠ์€ ์ด๋ถ„๋ฒ•์ ์ธ ๋„์‹์€ ๋งŽ์€ ๋ณ€์ฃผ๊ณก๋“ค์„ ๋งŒ๋“ค์–ด์™”๋‹ค. ๋งŒ๋ฌผ์˜ 'arche'๋ฅผ ์ฐพ์œผ๋ ค ํ–ˆ๋˜ ์ฒ ํ•™์˜ ์‹œ์กฐ์—์„œ๋ถ€ํ„ฐ ๋ณธ์งˆ๊ณผ ๊ฐ€์ƒ์œผ๋กœ ์„ธ์ƒ๊ณผ ์กด์žฌ๋ฅผ ํŒŒ์•…ํ•ด์™”๊ณ  ๊ทธ๋Ÿฌํ•œ ์„ธ์ƒ์— ๋Œ€ํ•œ ์„ค๋ช…, ๊ฐ๋ก ์œผ๋กœ์„œ ์„ธ์ƒ์˜ ์งˆ๋ฃŒ์  ์ธก๋ฉด๊ณผ ๋”๋ถˆ์–ด ์›€์ง์ž„ ๋˜ํ•œ ์ค‘์š”ํ•œ ์ฃผ์ œ๊ฐ€ ๋˜์–ด์™”๋‹ค

    ์˜์‹์— ๋Œ€ํ•œ ๋ฐ˜๋ฌผ๋ฆฌ์ฃผ์˜์  ์ž…์žฅ์˜ ๊ฐ€๋Šฅ์„ฑ ํƒ์ƒ‰

    No full text
    ํ•™์œ„๋…ผ๋ฌธ(์„์‚ฌ)--์„œ์šธ๋Œ€ํ•™๊ต ๋Œ€ํ•™์› :์ฒ ํ•™๊ณผ ์„œ์–‘์ฒ ํ•™ ์ „๊ณต,2001.Maste

    A new boundary condition for the Hall-magnetohydrodynamics equations

    No full text
    DoctorIn this dissertation, we prove a regularity criteria and the local well-posedness of strong solutions to the magnetohydrodynamics with the Hall and ion-slip effects in a smooth bounded domain. Moreover, for the magnetohydrodynamics with the hall effect and without ion-slip effect case, we prove the global stability of strong large solutions. These results are obtained under an integrable property that depends on a new vorticity boundary condition which is motivated by the generalized Navier-slip boundary condition involving the vorticity
    corecore