9 research outputs found

    ๊ต์ •์šฉ ๋ฏธ๋‹ˆ์Šคํฌ๋ฅ˜์˜ ๋””์ž์ธ์— ๋”ฐ๋ฅธ ์ž„์ƒ์  ์•ˆ์ •์„ฑ

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    Dept. of Dental Science/์„์‚ฌStability of orthodontic miniscrews according to screw designThis study was to evaluate the clinical efficiency of tapered and cylindrical miniscrews by estimating their success rate and long-term stability. There were 105 tapered and 122 cylindrical self-drilling miniscrews placed into the maxillary and mandibular buccal alveolar areas of 132 patients (43 males, 89 female) who were over 16 years old. The insertion torque (IT) and removal torque (RT) were measured using a torque sensor during implantation and removal of miniscrews and Periotest values (PTV) were recorded. And the miniscrews were checked after implantation to determine success or failure. The results of this study were as follows.1)The success rates of the tapered and cylindrical miniscrews examined were similar between two types of design. 2)In the buccal side of maxilla, the insertion torque of tapered miniscrews (8.3 Ncm) was significantly higher than that of cylindrical miniscrews (6.3 Ncm) (P 0.05).5)The distal area of the first molar had significantly lower success rates than other sites of insertion (P <0.01). But there was no significant difference in success rates according to gender, jaw and side of insertion. Tapered type miniscrews had higher initial stability compared to cylindrical type miniscrews, whereas the clinical success rates and removal torques were similar between the two designs. The long term stability and success rate can be affected by various factors, such as insertion torque, individual anatomical variation and insertion site.ope

    High performance sensor based on maximization of surface roughness of organic semiconductor thin film using control of surface energy of buffer layer

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    ๋ณธ ๋ฐœ๋ช…์€ ์™„์ถฉ์ธต์˜ ํ‘œ๋ฉด์—๋„ˆ์ง€ ์ œ์–ด๋ฅผ ์ด์šฉํ•œ ์œ ๊ธฐ๋ฐ˜๋„์ฒด ๋ฐ•๋ง‰์˜ ํ‘œ๋ฉด๊ฑฐ์น ๊ธฐ ๊ทน๋Œ€ํ™”์— ๊ธฐ๋ฐ˜ํ•œ ๊ณ ์„ฑ๋Šฅ ์„ผ์„œ์— ๊ด€ํ•œ ๊ฒƒ์œผ๋กœ, ์œ„ํ•ด, ๊ธฐํŒ; ๊ธฐํŒ ์ƒ๋ถ€์— ํ˜•์„ฑ๋˜๊ณ , ์†Œ์ˆ˜์„ฑ ์œ ๊ธฐ๋ฐ˜๋„์ฒด๋กœ ๊ตฌ์„ฑ๋˜๋Š” ํ™œ์„ฑ์ธต; ๋ฐ ๊ธฐํŒ๊ณผ ํ™œ์„ฑ์ธต ์‚ฌ์ด์— ํ˜•์„ฑ๋˜๊ณ , ์†Œ์ˆ˜์„ฑ ์œ ๊ธฐ๋ฐ˜๋„์ฒด์˜ ๋ถ„์ž๋“ค๊ฐ„ ์‘์ง‘์—๋„ˆ์ง€๋ณด๋‹ค ์ž‘์€ ํ™œ์„ฑ์ธต-๊ธฐํŒ๊ฐ„ ์ ‘์ฐฉ์—๋„ˆ์ง€๋ฅผ ์œ ๋„ํ•  ์ˆ˜ ์žˆ๋„๋ก, ์†Œ์ˆ˜์„ฑ ์œ ๊ธฐ๋ฐ˜๋„์ฒด์˜ ๋ถ„์ž๋“ค๊ฐ„ ์‘์ง‘์—๋„ˆ์ง€๋ณด๋‹ค ์ž‘์€ ํ‘œ๋ฉด์—๋„ˆ์ง€๋ฅผ ๊ฐ–๋Š” ์†Œ์žฌ๋กœ ๊ตฌ์„ฑ๋˜๋Š” ์™„์ถฉ์ธต์„ ํฌํ•จํ•˜๋Š” ์„ผ์„œ๋ฅผ ์ œ๊ณตํ•œ๋‹ค

    High performance sensor based on maximization of surface roughness of organic semiconductor thin film using control of surface energy of buffer layer

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    ๋ณธ ๋ฐœ๋ช…์€ ์™„์ถฉ์ธต์˜ ํ‘œ๋ฉด์—๋„ˆ์ง€ ์ œ์–ด๋ฅผ ์ด์šฉํ•œ ์œ ๊ธฐ๋ฐ˜๋„์ฒด ๋ฐ•๋ง‰์˜ ํ‘œ๋ฉด๊ฑฐ์น ๊ธฐ ๊ทน๋Œ€ํ™”์— ๊ธฐ๋ฐ˜ํ•œ ๊ณ ์„ฑ๋Šฅ ์„ผ์„œ์— ๊ด€ํ•œ ๊ฒƒ์œผ๋กœ, ์œ„ํ•ด, ๊ธฐํŒ; ๊ธฐํŒ ์ƒ๋ถ€์— ํ˜•์„ฑ๋˜๊ณ , ์†Œ์ˆ˜์„ฑ ์œ ๊ธฐ๋ฐ˜๋„์ฒด๋กœ ๊ตฌ์„ฑ๋˜๋Š” ํ™œ์„ฑ์ธต; ๋ฐ ๊ธฐํŒ๊ณผ ํ™œ์„ฑ์ธต ์‚ฌ์ด์— ํ˜•์„ฑ๋˜๊ณ , ์†Œ์ˆ˜์„ฑ ์œ ๊ธฐ๋ฐ˜๋„์ฒด์˜ ๋ถ„์ž๋“ค๊ฐ„ ์‘์ง‘์—๋„ˆ์ง€๋ณด๋‹ค ์ž‘์€ ํ™œ์„ฑ์ธต-๊ธฐํŒ๊ฐ„ ์ ‘์ฐฉ์—๋„ˆ์ง€๋ฅผ ์œ ๋„ํ•  ์ˆ˜ ์žˆ๋„๋ก, ์†Œ์ˆ˜์„ฑ ์œ ๊ธฐ๋ฐ˜๋„์ฒด์˜ ๋ถ„์ž๋“ค๊ฐ„ ์‘์ง‘์—๋„ˆ์ง€๋ณด๋‹ค ์ž‘์€ ํ‘œ๋ฉด์—๋„ˆ์ง€๋ฅผ ๊ฐ–๋Š” ์†Œ์žฌ๋กœ ๊ตฌ์„ฑ๋˜๋Š” ์™„์ถฉ์ธต์„ ํฌํ•จํ•˜๋Š” ์„ผ์„œ๋ฅผ ์ œ๊ณตํ•œ๋‹ค

    ์ถฉ์ฒญ๋‚จ๋„ 4๋Œ€์ˆ˜๊ณ„ ์ฃผ์š”ํ•˜์ฒœ ๋ชจ๋‹ˆํ„ฐ๋ง ๊ฒฐ๊ณผ๋ณด๊ณ ์„œ(2016๋…„)

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    ์ถฉ์ฒญ๋‚จ๋„ ์ฃผ์š”ํ•˜์ฒœ ์ˆ˜์งˆํ˜„ํ™ฉ ๋ฐ ๋ณ€ํ™”์ถ”์„ธ ๋ถ„์„์„ ํ†ตํ•œ ๋„๋ฏผ, ๊ณต๋ฌด์›, ๊ด€๋ จ ์ „๋ฌธ๊ฐ€๋“ค์—๊ฒŒ ์œ ์šฉํ•œ ์ •๋ณด๋ฅผ ์ œ๊ณตํ•˜๊ธฐ ์œ„ํ•œ ์ž๋ฃŒ์ง‘ ์ œ์ž‘1. ์ถฉ์ฒญ๋‚จ๋„ ์ˆ˜๊ณ„ ๋ฐ ํ•˜์ฒœ ํ˜„ํ™ฉ 2. ์ฃผ์š”ํ•˜์ฒœ ์ˆ˜์งˆ ํ˜„ํ™ฉ 3. ๊ณต๊ฐ„์ž๋ฃŒ ๋ถ„

    A Study of Leisure Sport, Smart Phone Addiction, Sleep Quality, and School Adaptation among Elementary School Students

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