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이백수,윤길봉,한천수 대한건축학회 2001 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.21 No.1
In this paper, prescription on the architectural standard specifications between China(CASS) and Korea(KASS) are compared focused on the part of transportation, placing, compacting and curing. According to the research, there are a lot of differences between KASS and CASS. In CASS, time limitation from discharging concrete to completing placement of concrete, transportation, placing and continuous placing time limit are provided in accordance with strength level such as below C30 and above C30. There are no provisions related to special purpose concrete in CASS.
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성인 교정치료를 위한 피질골절단술(Corticotomy)의 임상 적용
이백수,황혜욱,정규림,Lee, Baek-Soo,Hwang, Hye-Wook,Chung, Kyu-Rhim 대한악안면성형재건외과학회 1999 Maxillofacial Plastic Reconstructive Surgery Vol.21 No.3
In adult patients, the corrections of their malocclusion may be more difficult and require longer treatment time due to thicker layer of cortical bone and reduced blood supply. Recently, various methods such as surgery, implant for anchorage and corticotomy have been tried to overcome these problems. Corticotomy is a surgical technique in which a fissure is made through the cortical bone that surrounds a tooth so that the tooth is embedded within a block of bone that is connected to adjacent blocks through only the medullary bone. Technique of corticotomy has been widely used for correction of maxillary transverse deficiency, but hasn't actively in other fields of orthodontics. We applied corticotomies in many types of orthodontic treatment and had satisfactory results. We suggested clinical application of corticotomy in adult orthodontics to reduce treatment period and to achieve better stability after orthodontic treatment.
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열처리가 유리섬유 강화 복합재료의 전기적 및 기계적 성질에 미치는 영향
이백수,이덕출 한국전기전자재료학회 1998 전기전자재료학회논문지 Vol.11 No.3
In this work, the properties of FRP, which is applied recently in the composite insulating materials, by thermal treatment were investigated. The specimens were epoxy glass laminates fabricated by thermal press method and had the volume content of 46[%] cutted $45^{\circ}C$ in the fiber direction and 1.0[mm] thickness. The experimental results showed that the amount of weight loss, wettability, surface potential, and surface resistivity increased up to 200[$^{\circ}C$] as a function of temperature. Usually, most degradations caused the hydrophilic to decrease the contact angle. But, in this work on thermal-degradated FRP, we can confirm the introduction of hydrophobic properties by cross-linking and the ablation of polar small-molecules rather than chain scission and oxidation. Finally, weight loss and contact angle increased. These phenomena show the existence of hydrophobic surface. With the change to the hydrophobic surface and the electrical potential and resistivity on FRP surface increased. But, the dielectric properties and tensile stength are decreased.
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