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선천성 기관 석회화와 조롱박 구멍 협착 (Nasal Pyriform Aperture Stenosis)에 의한 호흡 곤란증 1례
김규태,김영미,박수은,박재홍,노환중,김학진,Kim, Kyu Tae,Kim, Young Mi,Park, Su Eun,Park, Jae Hong,Noh, Hawn Jung,Kim, Hak Jin 대한소아청소년과학회 2002 Clinical and Experimental Pediatrics (CEP) Vol.45 No.5
저자들은 출생 후 수 시간 뒤에 발생한 호흡 곤란을 주소로 내원한 환아에서 우연히 발견된 기관의 석회화와 양측 조롱박 구멍 협착증을 진단하고 비강 내에 스텐트를 위치시키는 수술로서 호흡 곤란 등의 증상 호전된 환아를 보고하는 바이다. Nasal obstruction is a cause of respiratory distress in newborns. The congenital nasal airway obstructive abnormalities are classified into three forms according to the location: posterior choanal atresia, nasal cavity stenosis and congenital nasal pyriform aperture stenosis(CNPAS). CNPAS is located at the anterior part of the nasal fossa. CT is the study of choice to make the diagnosis of CNPAS and rule out other causes of nasal obstruction. Though conservative management of CNPAS is recommended, in cases of severe CNPAS surgical treatment should be considered. Calcification of cartilage in the larynx, trachea and bronchi is extremely rare in children. Such calcifications are generally discovered in young children with congenital stridor. The clinical course is favorable. No case with CNPAS and tracheal calcification is reported in newborn. We report a one-day-old girl with CNPAS and tracheal calcification who presented with respiratory difficulty immediately after birth.
BSCCO-2212/$SrSO_4$ 벌크 초전도체의 제작 및 특성평가
김규태,장석헌,박의철,황수민,주진호,홍계원,김찬중,김혜림,현옥배,Kim, Kyu-Tae,Jang, Seok-Hern,Park, Eui-Cheol,Hwang, Su-Min,Joo, Jin-Ho,Hong, Gye-Won,Kim, Chan-Joong,Kim, He-Lim,Hyun, Ok-Bae 한국초전도학회 2006 Progress in superconductivity Vol.8 No.1
We fabricated Bi-2212/$SrSO_4$ bulk superconductors by the casting process and evaluated the effects of the powder mixing method and annealing temperature on the texture, microstructure, and critical current. In the process, the Bi-2212 powders were mixed with $SrSO_4$ by hand-mixing(HM) and planetary ball milling(PBM) method and then the powder mixtures were melted at $1100^{\circ}C{\sim}1200^{\circ}C$, solidified, and annealed. We observed that the rod made by the PBM had a more homogeneous microstructure and smaller $SrSO_4$ and second phases than that of the rod made by the HM, resulting in increased $I_c$. The $I_c$ of the rod also depended on the annealing temperature and the highest $I_c$ was obtained to be 200 A when prepared by HM at $1200^{\circ}C$ and annealed at $810^{\circ}C$ which is probably due to the moderate density and 2212 texture and the smaller and less second phase compared to that at higher temperature. The possible causes of the variations of $I_c$ with the powder mixing method and annealing temperature were related to the microstructural evolution based on the SEM, EPMA, and DTA analyses.
열처리조건이 BSCCO-2212 벌크의 특성에 미치는 영향
김규태,김찬중,임준형,박의철,박진현,주진호,현옥배,김혜림,Kim, Kyu-Tae,Kim, Chan-Joong,Lim, Jun-Hyung,Park, Eui-Cheol,Park, Jin-Hyun,Joo, Jin-Ho,Hyun, Ok-Bae,Kim, Hye-Rim 한국초전도학회 2008 Progress in superconductivity Vol.9 No.2
We fabricated BSCCO-2212(2212) bulk superconductors by using a casting process and evaluated the superconducting properties. The effects of annealing conditions on microstructure and critical properties were studied. It was found that the homogeneous and uniform microstructure improved the critical properties and the microstructures of ingot and annealed rods were different with the size of 2212 rod and tube. The critical current($I_c$) of rods increased with increasing annealing time, probably due to increased grain size of 2212. Annealing time of the highest $I_c$ for the smaller rod(diameter of 10 mm) was shorter(150 hr) than that of the larger rod(diameter of 16 mm, 400 hr). This size effect seems to be related to different grain sizes of the intermediate phases such as 2201 and secondary phases in the ingot. In addition, we fabricated 2212 tubes from the rod by removing the center region which contained inhomogeneous microstructures. The $I_c$ of 2212 tube with the outer diameter of 16 mm and the thickness of 2 mm was measured to 844 A, which corresponds to the critical current density of $1017\;A/cm^2$ at 77 K.
양축 정렬된 Ni 기판의 특성에 미치는 W 첨가의 효과
김규태,임준형,김정호,장석헌,김호진,주진호,김찬중,송규정,신형섭,Kim Kyu Tae,Lim Jun Hyung,Kim Jung Ho,Jang Seok Hern,Kim Ho-Jin,Joo Jinho,Kim Chan-Joong,Song Kyu Jung,Shin Hyung Sub 한국초전도학회 2004 Progress in superconductivity Vol.6 No.1
We fabricated cube-textured Ni and Ni-W alloy substrates for coated conductors and characterized the effects of W addition on microstructure, mechanical strength, and magnetic properties of the substrate. Pure Ni and Ni-(2, 3, 5at.%)W alloys were prepared by plasma arc melting, heavily cold rolled and then annealed at various temperatures of $600-1300^{\circ}C$. The texture was evaluated by pole-figure and orientation distribution function (ODF) analysis. Mechanical properties were investigated by micro Vickers hardness and tension test. Ferromagnetism of the substrate was measured by physical property measurement system (PPMS). It was observed that Ni-W substrates had sharp cube texture, and the full-width at half-maximums (FWHMs) of in-plane texture was $^{\circ}$-5.57$4.42^{\circ}$, which is better than that of pure Ni substrate. In addition cube texture of Ni-W substrates was retained at higher temperature up to $1300^{\circ}C$. Microstructural observation showed that the Ni-W substrates had fine grain size and higher mechanical properties than the pure Ni substrate. These improvements are probably due to strengthening mechanisms such as solid solution hardening and/or grain size strengthening. PPMS analysis showed that addition of W effectively reduced saturation magnetization in applied magnetic field and Curie temperature.
BSCCO(2212) 벌크 초전도체의 주조조건 및 SrSO<sub>4</sub> 최적함량에 대한 연구
김규태,박의철,장석헌,임준형,주진호,김찬중,김혜림,현옥배,Kim Kyu-Tae,Park Eui-Cheol,Jang Seok-Hern,Lim Jun-Hyung,Joo Jin-Ho,Kim Chan-Joong,Kim Hye-Rim,Hyun Ok-Bae 한국전기전자재료학회 2006 전기전자재료학회논문지 Vol.19 No.6
We fabricated BSCCO-2212 (2212) rod by the melt casting process (MCP) and evaluated the effect of the melt flowing on the critical current ($I_c$) by using vertical and tilt casting. It was observed that the $2212-SrSO_4$ rod processed by the tilt casting method with homogeneous pre-heating temperature of the mold had a higher $I_c$ than that processed by the vertical casting method. We also evaluated the influence of the strontium sulfates ($SrSO_4$) addition on the texture, microstructure, critical current and temperature, and mechanical hardness of the $2212-SrSO_4$ rods. It was observed that the addition of $SrSO_4$ improved the critical current ($I_c$) and mechanical hardness of the 2212. The $I_c$ of the 2212 increased as the $SrSO_4$ content increased and reached a peak value (260 A at 77 K) at an $SrSO_4$ content of 6 wt.%. In addition, the addition of $SrSO_4$ had a beneficial effect on the mechanical hardness of the 2212. We studied the possible cause of the variation in the $I_c$ with the melt flowing and the $SrSO_4$ content based on the XRD, EPMA analysis and the microstructural observation.
식도 자연파열[Boerhaave 증후군]의 외과적 치료;2례 보고
김근,장봉현,이종태,김규태,Kim, Keun,Chang, Bong-Hyun,Lee, Jong-Tae,Kim, Kyu-Tae 대한흉부심장혈관외과학회 1992 Journal of Chest Surgery (J Chest Surg) Vol.25 No.8
The spontaneous rupture of the esophagus is an uncommon disease, but without early diagnosis and treatment, the mortality rate is high. This report is on the two cases treated at the Department of Thoracic and Cardiovascular Surgery, College of Medicine, Kyu-ngpook National University. The first patient, after heavy drinking, had vomiting followed by chest pain, dyspnea and subcutaneous emphysema. After diagnosis using an esophagogram, an operation was perfomed. About a 4cm rupture was found at the lower left part of the esophagus and was primarily sutured with the intercostal muscle. The patient was weaned from the ventilator after 40 hours. The second patient had symptoms the same as the first case. Six days after the app-earence of the symptoms, the patient was treated by the Thais onlay gastric patch method. The leakage happened after the surgery and he received a conservative treatment. After discharge no abnormalities, such as leakage and stricture, were found on the eso-phagogram The two patients now live a normal life.
대학의 특허경영전문가 활용에 따른 기술이전성과에 관한 연구
김규태(Kim, Kyu-Tae),이정수(Lee, Jeong-Soo),정명선(Chung, Myung-Sun) 한국산학기술학회 2016 한국산학기술학회논문지 Vol.17 No.2
본 연구는 대학의 특허경영전문가 활용이 기술이전 성과에 미치는 영향을 조사함으로써 향후 대학이 기술전담조직의 전문성강화의 방향성을 제시하고자 하였다. 특허경영전문가 파견에 관한 세부적인 효과파악을 위하여 세부적으로 특허경영 전문가 파견유무, 특허경영전문가 파견기간, 특허경영전문가 파견연도로 세분화하여 연구를 진행하였다. 분석을 위하여, 대 학정보공시센터의 「대학알리미」자료와 한국지식재산전략원의 「특허경영전문가파견사업」자료를 활용하였으며, 총 110 개 4년제 대학을 중심으로 2008년부터 2013년간의 데이터를 활용하였다. 분석결과 첫째, 대학의 특허경영전문가활용은 활용 대학이 미활용대학 대비 기술이전 및 기술이전수입이 높은 것으로 나타나 대학의 기술이전 활성화를 이루는데 있어 특허경 영전문가 활용이 중요한 역할을 했다는 것을 알 수 있었다. 둘째, 대학의 특허경영전문가활용기간이 길수록 기술이전 및 기술 이전수입이 높아지는 것으로 나타나 사업의 효과를 더욱 극대화하기 위하여 기간을 연장할 수 있는 방안마련이 필요하다는 방향성을 도출할 수 있었다. 셋째, 특허경영전문가 파견연도(해당연도)에는 기술이전 및 기술이전이 높아지지 않은 반면, 파 견연도 전후로 기술이전성과가 나타나 특허경영전문가 파견이 즉각적인 효과라기 보다는 후속적인 효과로 해석할 수 있었다. 그렇기 때문에 파견사업의 효과를 단순히 짧은기간에 한정시키지 말고, 장기적인 관점에서 기술이전전담조직을 활성화시켜야 할 것이다. The purpose of this study was to present the future directions for strengthening the TLO(Technology licensing office)s' expertise of universities by examining the impact on utilizing the university management experts for patents and technology transfer. To identify the specific effects of dispatching patent management experts, this study was conducted under various conditions, such as the dispatch status, the dispatching duration of patent management experts and the starting year of dispatching them. The data were analyzed by utilizing the data of the KIPSI's supporting program of dispatching the patent management expert to universities and the data of University Information Disclosure site. The data from a total of 110 four-year universities from 2008 to 2013 were used. According to the analysis result, the technology transfer's performance and technology transfer's income of universities of utilizing the patent management experts compared to universities not utilizing them appeared to be high. Technology transfer and technology transfer income appeared to be higher with a longer period of utilizing the patent management expert at university. This suggests that the direction is required to provide the plan for a longer period to maximize the effect of the program "The dispatching a patent management expert". The technology transfer's performance and technology transfer's income did not increase according to the year of dispatched the patent management expert at the university. A comparison of before and after dispatching, the technology transfer performance appeared to be high after dispatch. This suggests that the effects of dispatching the patent management experts at a university can be interpreted as a subsequent effect, rather than an immediate effect. Therefore, it does not simply limit the effectiveness of the dispatch business in the short term, but it needs to activate the technology transfer organization, such as a patent management expert in the long term.