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      • SCOPUSSCIEKCI등재

        한국인 윌리스환의 미세수술적 해부

        신종현,함인석,김승래 대한신경외과학회 1995 Journal of Korean neurosurgical society Vol.24 No.10

        The authors studied and analyzed microsccopically structure, length and diameter of each part of Willis circle in 264 cerebral hemespheres of 182 autopsied patients in the Taegu area from 1984 to 1990. The mean length of each A1 was 14.1mm and diameter at distal A1 was 2.25mm. The most common anatomical anomaly of the ACA part was A1 that of hypoplasia which appeared in 7.5% of the cases. The origin of the Heubner a. was accounted for the highest incidence of AcoA(82.5%). The length of AcoA, noted 3.5mm with the incidence of duplication and triplication in 38.6%. The inner diameter of ICA noted 3.9mm at the communicating segment in ICA, and the average length of C4 was 12.5mm. Except 5 hemispheres of undetectable origin at ICA, all the anterior choroidal a. originated from ICA, and the double stump of which noted 15.5%. Fetal type PcoA. showed 16.6% of all and average legnth of the a. was 13.5mm. The inner diameter of MCA was 3.1mm and the mean length of M1 noted 15.5mm. The length of each P1 noted 6.95mm and the inner diameter of basilar a. at 1cm below the bifurcation was 3.3mm. The mean circumference of willis circle including both side of A1, P1, PcoA. AcoA. and choroidal and communicating segment of ICA was 88.6mm. Incidental finding of unruptured aneurysm noted 5.3% and junctional dilatation of PcoA. showed 11.4% of all the cases.

      • KCI등재
      • 치상돌기 골절에서 전방경유 나사못 고정술

        신종현,성주경,황성규,함인석,박연묵,김승래 慶北大學校 醫科大學 1996 慶北醫大誌 Vol.37 No.2

        목적 : 제2경추 치상돌기 골절의 수술방법중에서 경부 운동제한이 거의 없고 골이식이 필요없는 등 골절부위를 직접 고정하는 전방경유 나사못 고정술을 실시하여 결과를 관찰함. 대상 및 방법 : 1995년 4월부터 1996년 6월까지 본 교실에서 수술을 실시한 18례의 환추축성 불안정증중 type Ⅱ-P 치상돌기 골절 2례에서 전방경유 나사못 고정술을 실시하였음. 결과 : 경부운동 제한이 없이 정상적인 상태로 회복되었다. 결론 : 전방경유 나사못 고정술로서 수술후 즉시 안정성을 회복하였으며 장기간 경과관찰상 골유합이 잘 되었으며 이 방법은 4㎜이상 전위된 type Ⅱ-P 치상돌기골절인 경우에 환추횡인대의 손상이 없으면 가장 좋은 치료방법으로 관절의 유합이 필요없어 운동반경의 제한이 전혀 없었다. Several different methods have been advocated for treatment of the atlantoaxial instability include anterior and posterior fusion methods because of nonunion of odontoid process fracture, especially in type Ⅱ odontoid process fracture. Most surgical stabilizations of displaced Type Ⅱ fractures of the odontoid process use anterior and posterior cervical wiring or plate techniques with Cl-2 arthrdesis. But these procedures have resulted in obliteration of the rotation and flexion/extension of the atlantoaxial complex. In case of type Ⅱ-P odontoid process fracture with intact transverse ligament, direct anterior screw fixation of odontoid process can be a treatment of choice. Between Apr. 1995 and Jun. 1996, 19 cases of at lanto-axial instability was operated in Kyungpook National University Hospital. Among them, 2 cases of anterior screw fixation of odontoid fracture was done The odontoid fractures were stabilized with two 4.0㎜ cancellous screws inserted through an anterior approach to the neck under fluoroscopic control with the skin incision at the C5 level and fracture union and cervical stability were demonstrated without evidence of screw loosening or loss of fixation and neck motion limitation.

      • KCI등재

        골격성 전치부 반대교합 아동의 치아성숙도에 관한 연구

        신종현,권민석,김신,정태성 大韓小兒齒科學會 2010 大韓小兒齒科學會誌 Vol.37 No.3

        전치부 교환기의 반대교합 아동에서는 골격적 특성이 강할수록 상하 치아의 성숙도에 현격한 차이가 있음을 쉽게 관찰할 수 있다. 파노라마 방사선 사진으로 평가가 가능한 상하 치령의 차이가 III급 부정교합의 조기 징후로 개연성이 있다면, 이것은 조기 감별진단의 한 도구로써 가치가 있을 것으로 판단되었다. 부산대학교치과병원 소아치과에 내원한 Hellman 치령 IIA, IIC의 환자 를 대상으로, 측두방사선사진, 파노라마 방사선사진, 석고 모형과 임상사진을 조사하여 정상교합군과 전치부 반대교합군 각 50명을 선택하였다. 이들의 파노라마 방사선사진을 이용하여 Demirjian법으로 각 군의 상하 치령 및 제1대구치 맹출율을 구하고 그 차이를 비교, 분석하여 다음과 같은 결과를 얻었다. 1. 정상교합군과 반대교합군 모두에서 역령에 비해 치령이 높게 나타났으며 성차는 보이지 않았다(p>0.05). 2. 정상교합군과 반대교합군의 상하 치령의 차이는 각각 0.22세와 0.69세로 반대교합군에서 더 큰 차이를 보였다(p<0.05). 3. 정상교합군에 비해 반대교합군에서 상하 제1대구치 맹출율의 차이가 크게 나타났다(p<0.05). It was easy to find that children of a skeletal anterior crossbite in the early mixed dentition period showed a stark difference in the dental maturity between their maxillary and mandibular teeth, if they have stronger physical characteristics. If the difference of dental age between maxillary and mandibular teeth which can be identified via panoramic radiographs may serve as an early sign of class III malocclusion, this is considered valuable as a tool of early detection diagnosis. We obtained lateral cephalometric radiographs, panoramic radiographs, working model and clinical images of patients of Hellman dental age IIA and IIC who visited the department of pediatric dentistry, Pusan National University Dental Hospital and examined them to select 50 patents for normal occlusion group and skeletal anterior crossbite group, respectively. Their panoramic radiographs were used for the Demirjian's method to figure out dental ages of maxillary and mandibular teeth of each group and the eruption rate of the first molars. Their differences are as follows: 1. In both groups, the dental ages from Demirjian's method were advanced than the chronological ages. No sexual dimorphism was detected for the chronological or dental age in either group (p>0.05). 2. The difference of dental age of maxillary and mandibular teeth between the normal occlusion group and crossbite group was 0.22 and 0.69 years, respectively, with a higher difference in crossbite group(p<0.05). 3. Compared to the normal occlusion group, the crossbite group showed a higher difference in the eruption rate between maxillary and mandibular first molar(p<0.05).

      • KCI등재후보

        터빈 로터의 후류 유동장 해석을 위한 간략화 수치모델 개발

        신종현,장세명 한국풍력에너지학회 2019 풍력에너지저널 Vol.10 No.2

        In the design of wind farms, the loss of power should be seriously considered for downstream wind turbines that emerge inside the wake region of upstream ones. The rotation of the upstream wind-front rotor generates a high-vorticity wake with turbulence, and a suitable model is required in computational fluid dynamics (CFD) to predict the deficit of energy of the downstream turbine for the given configuration. A novel numerical model based on the classical momentum theory is proposed in this study for a single wind turbine, which is proposed with a couple of tuning parameters applied to Reynolds-averaged Navier-Stoke (RANS) analysis, where two parameters reflect axial and rotational wake motion, simply tuned with experimental wind-tunnel data and its corresponding large eddy simulation (LES) results. The simplified numerical model has an average error of 3.1 % in the wake velocity profile in the results of LES and experiments, and the wake deficit value comes closer to the Betz limit as the tip speed ratio goes to the rated value, resulting in a remarkable reduction in computational load compared with advanced methods such as LES.

      • KCI등재후보

        송탄산업단지의 악취오염물질 농도 및 확산에 관한 연구

        신종현,김종보,권보연,류형열,김상훈,김현자 한국냄새환경학회 2011 실내환경 및 냄새 학회지 Vol.10 No.4

        Odorous compounds were monitored and dispersion modeling was conducted using AERMOD model. for Songtan Industrial Complex (SIC) located in Mogok-dong, Pyeongtaek city. The complex odor at the target area showed an average dilution ratio of 4.5 and low ammonia concentrations were observed (78.3 ppb). Sulfide,methyl iso-buthyl ketone, methyl ethyl ketone and styrene were not detected. The toluene concentration showed as 1233.3 ppb, which was the highest in the target compounds. The diffusion effect of odorous pollutants by wind was confirmed by descending order of concentration, inner-SIC (282 ppb) > downwind site (182 ppb) >upwind site (11.6 ppb). The results of the modeling demonstrated that the complex odors on the west and, south,north and east of the boundaries were dilution ratios of 10 24 and 20, respectively indicating the north and the east of SIC were more vulnerable to odor pollution than other regions. 본 연구는 평택시 모곡동에 위치한 송탄산업단지를 대상으로 악취오염물질을 모니터링하고 AERMOD 모델을이용한 확산 모델링을 수행하였다. 대상지역에서 발생한 복합악취는 평균 4.5배였으며 암모니아 농도는 78.3ppb로 농도가 낮았다. 황화합물과 메틸아이소뷰티르케톤, 메틸에틸케톤, 스티렌은 검출되지 않았다. 톨루엔은최고 1233. 3ppb로 측정되어 조사대상 오염물질 중 가장 높은 농도를 보였고 지점별 농도가 산업단지 내(282.3ppb)> 풍하지점(183.2 ppb)> 풍상지점(11. 6ppb) 순으로 나타나 바람에 의한 오염물질 확산을 확인할 수 있었다. 악취모델링 결과, 산업단지 서쪽과 남쪽 부지경계선의 복합악취는 10배였으며 북쪽은 24배, 동쪽은 20배로계산되어 산업단지 북쪽과 동쪽이 악취에 취약한 것으로 예측되었다.

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