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??과 ?? 先非晶質化를 利用하여 形成한 薄膜 接合의 比較
韓明錫,洪信男 한국항공대학교 1991 論文集 Vol.29 No.-
Shallow ?? 접합 형성을 위해 주입에너지가 각각 50keV인 Ge과 As 이온을 이용하여 선비정질화하였다. Doping을 위해 10keV B, 50keV BF₂8keV BF₂이온을 ??의 dose로 주입하였다. 선비정질화 하지않는 single crystal silicon에도 B과 BF₂를 같은 조건로 주입하여 선비정질화된 시편과 재료적, 전기적 특성을 비교 분석하였다. Boron을 10keV 주입한 경우에는 선비정질화 이온의 종류에 관계없이 비슷한 boron SIMS profile을 보이고 있으나, ASR측정에 의한 boron 이온 분포에서는 Ge으로 선비정질화한 경우가 가장 shallow한 접합 깊이를 나타냈다. Sheet 저항 측정 결과에 의하면 Ge으로 선비정질화한 경우가 As으로 선비정질화한 경우보다 더 작게 나타났으며, 다이오드 누설 전류 측정은 선비정질화한 경우보다 더 작게 나타났으며, 다이오드 누설 전류 측정은 선비정질화한 경우나 선비정질화하지 않은 경우 모두 양호한 결과를 보이고 있다. 이온 주입 에너지를 25keV로 낮추어 선비정질화한 경우에는 8keV BF₂이온을 주입하였는데, ASR로 측정한 경우에는 As으로 선비정질화한 경우가 가장 shallow 하였다. 그러나 As으로 선비정질화한 시편은 매우 높은 Rs값과 나쁜 누설 전류 특성을 보여 shallow ??접합 형성을 위해 저에너지 BF₂이온을 주입할 경우에는 As을 사용하는 것보다 Ge을 이용하여 선비정질화 하는 것이 유리함을 알 수 있었다. To form shallow ?? -n junctions, Ge and As ions with 50 and 25keV implantation energies were used for preamorphization. Subsequent 10keV B, 50keV BF₂or 8keV BF₂ion implantation was carried out at a dose of ??. Same B and BF₂ion implantations were performed into single crystalline silicon to compare the material and electrical characteristics with the preamorphized samples. SIMS measurements for 10keV B implanted samples revealed the similar boron distribution for two preamorphized cases, but the ASR profiles indicated that the shallower junctions could be formed by Ge preamorphization. Sheet resistance of Ge preamorphized sample was lower than the As preamorphized sample, and the diode leakage current characteristics were similar for the preamorphized and non-preamorphized samples. For the samples implanted with BF₂ions into the substrates preamorphized with 25keV Ge or As ions, the junction depth measured by ASR was shallowest for the As preamorphized sample among the three implantation conditions. Since very high sheet resistance and leaky diode characteristics were obtained for the samples preamorphized with As ions, Ge preamorphization method is found to be more useful for the purpose of forming shallow ?? junctions using low energy BF₂implantation.
광합성계 Ⅱ에서의 물의 산화반응 보조인자에 대한 산화환원 모델물질인 Schiff-base 망간착물의 합성
송명섭 大邱敎育大學校 科學敎育硏究所 1990 과학·수학교육연구 Vol.14 No.-
Two manganese(III) complexes of the type [MnL(H₂O)]+(L=dianion tetradendate Schiff-base), [Mn(salhpd)(H₂O)]CIO₄ and [Mn(respd)(H₂O)]CIO₄ , have been prepared via the use of tetradendate Shiff-base and Mn(CIO₄)₂.6H₂O following air oxidation for 5 days. The solid-state i.r. spectra of the complexes don't exhibit a band at ca. 900cm??¹, which is assignable to bridging water group. It was seen that the MV?? absorption peak at 602,394nm increased with visible light irradiation of the [Mn(salhpd)(H₂O)]CIO₄, MV??, and EDTA in water. MV?? can evolve hydrogen molecules from water at pH 7 under Pt particles as catalyst. Therefore the complex will be utilized to the photosenstizer.
The Onset of Natural Convection in Horizontal Fluid Layer Heated Uniformly from Below
김민찬,현명택 濟州大學校 産業技術硏究所 1999 산업기술연구소논문집 Vol.10 No.2
The critical condition of the onset of buoyancy-driven convective motion of uniformly heated horizontal fluid layer was analysed by the propagation theory. The onset time is obtained as a function of the Rayleigh number and the Prandtl number. Our theoretical results predicted the experimental results. quite reasonably.
상악 골절단 및 급속구개확장(SARME)을 이용한 술전 치성보상의 해소와 악교정 치험 2례 : REPORT OF 2 CASES
강상원,김명래,김기환,김한석,김채두 大韓顎顔面成形再建外科學會 2003 Maxillofacial Plastic Reconstructive Surgery Vol.25 No.4
This is to review the surgically assisted rapid maxillary expansion followed by orthodontic treatment for malocclusion with maxillary narrow-arch. Two patients who presented with narrow-arch maloccluson and transverse maxillary deficiency underwent a Lefort I osteotomy extending to the zygomatico-maxillary but-trees and splitting of the midpalates. Orthopedic expansion was initiated with one complete rotation 0.8㎜ of the expansion screw on the day, and followed by two quarter-turn 0.4㎜ each day thereafter untill the arch expanded to preplanned level. Changes of the mid-incisal gap space. intermolar width. incisal inclination, TMJ symptoms and reapse tendency were examined periodically. After the surgico-orthodontic leveling and alignment. pre-planned orthognathic surgeries (maxillary & mandibular osteotomies) were rendered to correct the maxillofacial deformites. Results:Intermolar width (IMW) was increased to 13㎜ within 20 days and the gap between to cen-tral incisors was declined to5-7^。. There were neither complaints nor signs of TMJ disorders during treatment. The amount of relapse was less than 0.5㎜ in a year. Therefore, the surgically assisted rapid palatal expansion(SARME) can be a pre-orthodontic option to gain the interdental space in narrow-arch malocclusion with crowding and to reduce the labial inclination of upper incisors without extraction of premolars.
최 일,오주환,류명춘 경운대학교 산업기술연구소 1999 産業技術硏究論文誌 Vol.1 No.1(B)
We present a scale and rotation invariant approach to detect the eyeballs of upright-frontal face images. The proposed method uses the Log-Polar transform which can obtain the scale and rotation invariant features from an object and an intensity-based template matching with a single template that made from a Log-Polar image of a face. Experimental results showed that the proposed method achieves 98.3% detection rate on a data set of 795 images.
Diclofenac sodium 으로 인한 Nicolau 증후군 1예
김소진,강정대,윤녕훈,박석돈 대한피부과학회 2004 大韓皮膚科學會誌 Vol.42 No.3
Nicolau syndrome is defined as local cutaneous and sometimes muscular necrosis observed at the injection site of intramuscular preparations. It is characterized by severe pain immediately after the injection and variable degrees of skin necrosis. The only treatment is conservative. A 46-year-old man presented with painful skin necrosis on his buttock after the injection of diclofenac sodium. Histopathologic examination showed necrosis of the epidermis and upper 2/3 of the dermis. The lesion was treated conservatively with topical antibiotic ointment. We report a rare case of Nicolau syndrome due to dicolfenac sodium. (Korean J Dermatol 2004;42(3):370~372)
양측성 이중성 대상포진 (herpes zoster duplex bilateralis) 1예
김소진,강정대,윤녕훈,박석돈 대한피부과학회 2004 大韓皮膚科學會誌 Vol.42 No.3
Herpes zoster classically occurs unilaterally within the area of skin innervated by a single sensory ganglion. Simultaneous involvement of two noncontiguous dermatomes in very rare and it has been referred to as zoster duplex unilateralis of bilateralis, depending whether one or both halves of the body are involved. A 47-year-old woman presented with painful grouped vesicles on the right chest and the left lower back. The tzanck smear and the skin biopsy were consistent with herpetic infection. She was treated with intavenous acyclovir without any significant complications. We report a rare case of zoster duplex bilateralis. (Korean J Dermatol 2004;42(3):367~369)
김성민,이종호,김남열,안강민,최원재,최시호,차미주,이주영,황순정,장정원,명훈,최진영,서병무,정필훈,김명진 大韓顎顔面成形再建外科學會 2003 Maxillofacial Plastic Reconstructive Surgery Vol.25 No.4
Schwann cells(SCs), an important component of the peripheral nervous system, intract with nerous to mutually support growth and replication for the peripheral nerve regentation. Recently, ading SCs to the lumen of guidance channel is widely tried to improve regeneration or to make regeneration possible over otherwise irreparable gaps. however, it is not easy to isolate and multiplicate SCs as much as enough to help the axonal regeneration. For the allogeneic SCs source for tubular nerve guidance, we developed a little bit improved technique of harvesting and multiplicating SCs. by culturing dispersed dorsal root ganglia in specially designed medium with growth factors and serial processing, we repeatedlly generate relatively homogenous SC cultures. Our technique was compared with other methods of literature using immunostaining methods such as GFAP, S100, BDNF and the total SC count assessment at different time interval after primary culture.