• Archives of Plastic Surgery
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• 제48권2호
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• pp.208-212
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• 2021

Background There are currently no guidelines for the postoperative wound management of the hard-palate donor site in cases involving mucosal harvesting. This study describes our experiences with the use of an artificial dermis for early epithelialization and transparent plate fixation in cases involving hard-palate mucosal harvesting. Methods A transparent palatal plate was custom-fabricated using a thermoplastic resin board. After mucosal harvesting, an alginic acid-containing wound dressing (Sorbsan) was applied to the donor site, which was then covered with the plate. After confirming hemostasis, the dressing was changed to artificial dermis a few days later, and the plate was fixed to the artificial dermis. The size of the mucosal defect ranged from 8×25 to 20×40 mm. Results Plate fixation was adequate, with no postoperative slippage or infection of the artificial dermis. There was no pain at the harvest site, but a slight sense of incongruity during eating was reported. Although the fabrication and application of the palatal plate required extra steps before and after harvesting, the combination of the artificial dermis and palatal plate was found to be very useful for protecting the mucosal harvest site, and resulted in decreased pain and earlier epithelialization. Conclusions The combination of artificial dermis and a transparent palatal plate for wound management at the hard-palate mucosal donor site resolved some of the limitations of conventional methods.

• 반도체디스플레이기술학회지
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• 제16권1호
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• pp.45-51
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• 2017

Poly(urethane acrylate) siloxane oligomers with Interpenetrating polymer netwoked nanoparticles were prepared to synthesize hard coating solution by reaction with diisocyanates. The diisocyanate combined siloxane hard coating solution showed more flexibility than the siloxane solution. In addition, diisocyanate resulted in improvement of curl property and surface hardness in the siloxane solution. Of the used diisocyanates, isophorone diisocyanate and acryloyloxy ethyl diisocyanate were good for UV hard coating solution. This effect will decrease brittleness in the siloxane solution using for plastic display plate.

• The Journal of Korean Physical Therapy
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• 제22권1호
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• pp.27-32
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• 2010

Purpose: This study was designed to examine the effects of a Halliwick rotation program on improving balance. Methods: Nine healthy females were randomly assigned to a Halliwick rotation program training as an aquatic group (n=9, age=$22.5{\pm}1.3$ years) or to a control group. The aquatic group trained using a Halliwick rotation program (3 times/week, 30 min/day) for 6 weeks. Balance was measured according to stance position: Hard Plate Open Eyes (HOE), Hard Plate Close Eyes (HCE), Soft Plate Open Eyes (SOE) and Soft Plate Close Eyes (SCE). This was done before the training and 3 and 6 weeks after the training. The data were analyzed with the SPSS Win 12.0 program using repeated measure ANOVA. Results: There were significant training-induced differences in SOE and POE (p<0.05), and in SCE and PCE (p<0.05) by Toe pad. There were significant training-induced differences in SOE and POE (p<0.05) by Heel pad after the aquatic rotation exercise program. Conclusion: The Halliwick rotation program can improve balance.

• 한국방사선학회논문지
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• 제4권3호
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• pp.27-31
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• 2010

엑스선 영상의 공간분해능은 영상획득 장치에 사용되는 광학소자의 성능에 의해 결정된다. 8.5keV에서 높은 공간분해능 달성이 가능한 존 플레이트를 설계하였다. 방사광을 이용하는 대신 엑스선 튜브를 사용하는 영상시스템에서는 80nm의 공간분해능을 달성할 수 있음을 광선추적 기법을 이용하여 예측하였다. 전자빔 석판인쇄술을 이용하여 최외곽 폭 40nm를 갖는 존 플레이트가 제작하였다.

• 반도체디스플레이기술학회지
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• 제16권3호
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• pp.87-92
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• 2017

Poly(urethane acrylate) siloxane oligomers with Interpenetrating polymer networked nanoparticles were prepared to synthesize hard coating solution by reaction with isophorone diisocyanate(IPDI) of 1, 2, 3, 4 phr. The structures and molecular weights of the synthesized solutions were characterized by IR spectroscopy and gel permeation chromatography, respectively. In the cross-cut test for the adhesion, all the solutions showed good adhesion of 5B regardless of the content of IPDI and film thickness. The addition of 1 phr IPDI resulted in the best pencil hardness. The IPDI combined siloxane hard coating solution showed more flexibility than the siloxane solution. These results will yield the improvement in the siloxane solution using for plastic display plate.

• 접착 및 계면
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• 제8권2호
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• pp.1-8
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• 2007

자동차의 유리를 폴리카보네이트로 대체하기 위하여 폴리카보네이트 판 위에 하드 코팅을 시도하였다. 본 연구에서는 (3-glycidoxypropyl)trimethoxysilane (GPTMS), colloidal silica (CS), (3-aminopropyl) triethoxysilane (APS)으로부터 졸-겔 과정을 이용하여 코팅을 형성하였는데, 이 때 가장 우수한 물성을 갖는 조건들을 찾아보았다. GPTMS와 CS를 에탄올 용매 안에서 가수분해 시킨 후에, APS를 첨가하여 코팅 액을 제조하고 이 코팅 액을 가지고 폴리카보네이트 판 위에 코팅을 실시하였다. 제조된 코팅 액으로부터 경도 2H의 투명하고 고른 면을 갖는 코팅 막을 형성할 수 있었으며, 형성된 코팅 막은 매우 우수한 내마모성과 접착력을 나타내었다.

• Journal of international Conference on Electrical Machines and Systems
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• 제2권3호
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• pp.295-299
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• 2013

This paper presents the new structure of a spindle motor for hard disk drive (HDD). It can produce axial force as well as torque without a pulling plate or a pulling magnet required for the normal operation of a hydrodynamic bearing in rotating-shaft structure. The proposed models have different air gap length along the axial direction by changing the thickness of permanent magnet (PM). One has a single slope and the other has double slopes on the surface of PM. For the design of the proposed models, variables are defined and its effects on the motor performances are investigated by 3-demensional finite element analysis (FEA). The equi-performance curves are investigated for the main characteristics of the spindle motor such as generated torque, axial force and torque ripple ratio. The validity of the proposed models is verified by the feasibility study and performance evaluation.

• 접착 및 계면
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• 제9권3호
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• pp.1-6
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• 2008

자동차의 유리를 폴리카보네이트로 대체하기 위하여 폴리카보네이트 판 위에 하드 코팅을 시도하였다. 본 연구에서는 p-phenylene (PPH)과 m-phenylene (MPH)의 공중합체들을 합성하여 이것들을 이용하여 폴리카보네이트 판 위에 코팅을 시도하였다. 공중합체내의 PPH와 MPH의 비율에 따라서 다양한 강도를 나타내는 코팅이 형성되었다. PPH와 MPH의 비율이 20 : 80일 경우에 연필 경도 2H를 나타내었으며, 이 때 내마모성도 매우 우수하였다.

• 폴리머
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• 제32권5호
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• pp.427-432
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• 2008

자동차의 유리를 폴리카보네이트로 대체하기 위하여 폴리카보네이트 판 위에 하드 코팅을 시도하였다. 본 연구에서는 polyphenylene 유도체들을 합성하여 이것들을 이용하여 폴리카보네이트 판 위에 코팅을 시도하였다. 합성한 polyphenylene 유도체는 poly(benzoylphenylene)과 그의 phenylene 공합체들이다. Poly (benzoylphenylene)을 이용한 코팅은 최고 연필 경도 1H를 나타내었으며, 이것의 공중합체를 이용한 코팅에서는 최고 연필 경도 2H를 나타내었다. 내마모성도 공중합체가 더 우수한 결과를 보여 주었다.

• 한국인쇄학회지
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• 제20권2호
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• pp.69-83
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• 2002

This research attempts on plate making for gravure. Direct Hard Dot Method, Helio Kliso Graph, and Laser TB Dot; these three method are the most popular in Korea. For examining ink transmission, three plates were made in the above three different way for the same manuscript and were printed under the same condition. After printing speed was also varied into 150line/inch, 175line/inch, and 200line/inch, ink transmission was examined too. After printing the same manuscript with the above three method then the researcher examined level of ink transmission. Printing lines shows that Laser TB Dot Method and Direct Hard Dot Method were favorable level, while there was big differences of state of Helio Kliso Graph plate.