형판정합기반 영상 정규화를 통한 고유얼굴(Eigenface)알고리즘 성능개선 방법

최영규,신현금,장경식 한국기술교육대학교 2003 論文集 Vol.10 No.1

A new approach for face recognition is proposed. Our method adopts the Eigenface algorithm as the main classifier, but improves performance by normalizing input images based on template matching technique. Firstly, the two eye regions are evaluated by template matching with a set of ordinary eye templates. The scale and rotation factors are estimated based on the distance and angle between left and right eyes, and we generate a normalized face of the input image, and finally, it is provided as the input of the Eigenface algorithm. Since, Eigenface is a good recognition method but is vulnerable to image variations such as rotation and illumination conditions, our face normalization approach could be very effective.

동양 전통과학의 탐구방법론 연구 : 朱子의 格物致知論을 중심으로

최영제,이우붕,정원우,김용수,문장수,방경곤,김기정 경북대학교사범대학과학교육연구소 2005 科學敎育硏究誌 Vol.29 No.-

노인의 영적 간호요구

최미혜,김경희,김귀옥,김기숙,김수강,김정신,김춘숙,노흥진,박지연,성혜연,오명선,이선희,이원옥,이윤영,이현수,장명재,차혜경,채정선,홍상희 중앙대학교 의과대학 간호학과 간호과학연구소 2001 중앙간호논문집 Vol.5 No.1

This study was designed to exam the aged's needs for spiritual nursing care. The purpose was to serve as a basis for the development of spiritual nursing practice. The major findings are as follows : 1. The degree of needs for spiritual nursing care as area was that needs of love and relationship mean 22.0, needs of meaning and object mean 28.2, needs of forgiving mean 13.5. Total needs for spiritual nursing care mean 63.7, which was on the upper middle level. The needs of meaning and object was rated highest. 2. Among the general characteristics of the subjects, needs of love and relatiohship wasn't significanlty different. 3. Among the general characteristics of the subjects, needs of meaning and object was significantly different according to two factors : age(F=7.260, p=0.001), religion(F=5.275, p=0.001). Higher needs of meaning and object was possessed by the older than the younger, by the one who have religion than the other. 4. Among the general characteristics of the subjects, four factors made a significantly difference to needs of forgiving : sex(t=-2.851, p=0.006), age(F=8.201, p=0.001), religion(F=6.928, p=0.000), disease(t=2.327, p=0.024). Higher needs of forgiving was possessed by man than woman, by the older than the younger, by the one who have religion than the other, by the one who have disease than the other.

타이타늄의 주조성

최기열,장경수,윤숙진 대한치과기재학회 1999 대한치과재료학회지 Vol.26 No.2

In order to investigate the castability of titanium, Kennedy Class 1, division 2 removable partial denture frameworks were designed. According to the manufacturer's instruction, 10 casting bodies each were obtained with pure titanium and cobalt-chrome alloy. The results were as follows ; 1. Castability of titanium was comparable with that or cobalt-chrome alloy in terms of fitness and surface detail reproducibility. 2. There was no radiographically detectable porosity in each casting body of titanium and cobalt-chrome alloy. 3. The number of internal porosities and narrow, long defect were almost same between titanium and cobalt-chrome alloy. 4. Vickers hardness number of cobalt chrome alloy was 439.4±16.1 and that of titanium was 200.1±23.3. 5. Biocompatibility and low density of castable titanium would provide denture rearers with multiple benefits.

Acinetobacter sp. BE-254에 의한 유화제의 생산

최경숙,장경립,임이종,김순한,정영기,이태호 동의대학교 기초과학연구소 1997 基礎科學硏究論文集 Vol.7 No.1

The strain producing bioemulsifier was isolated from soil samples. The isolated strain was identified as the genus Acinetobacter through its morphological, cultural and physiological characteristics. The highest emulsification activity and stability by Acinetobacter sp. BE-254 was observed after 5 days of cultivation in the culture medium containing n-hexadecane 4%, NaNO₃0.2%, KH₂PO₄0.01%, MgSO₄·7H₂O 0.01%, CaCl₂0.01%, and yeast extract 0.01%. The optimum pH and temperature for bioemulsifier production were pH 7.0 and 30℃, respectively. Furthermore the most of bioemulsifier was produced during the exponential growth phase, and this suggested that the bioemulsifier production was growth-associated. The bioemulsifier showed good emulsification activity on various emulsifying substrates such as hydrocarbons, edible oils, and petroleum fractions.

자궁경부암에서 치료 전 FDG PET을 이용한 예후 예측

장홍주,최준영,김영환,박정미,이경한,이제호,김병태 대한핵의학회 2003 핵의학 분자영상 Vol.37 No.5

목적: 자궁경부암에서 예후를 예측하는 것은 임상적으로 중요하다. 이 연구에서는 치료 전 FDG PET에서 관찰된 림프절 전이 유무와 원발종양의 FEG 섭취정도가 자궁경부암 환자에서 치료 후 예후를 다른 예후인자와 비교하여 독립적으로 예측할 수 있는지 알아보았다. 대상 및 방법: 자궁경부암이 새로 진단된 74명의 환자를 대상으로 하였다(50±12세). FDG를 정맥주사하고 전신 PET 영상을 얻었다. 자궁경부의 원발종양에서 최대 표준섭취지수를 측정하였고, 두 명의 핵의학과 의사가 판독하였다. 모든 환자에 대하여 추적 관찰하여 재발 여부를 알아보았다. Kaplan-Meier 법으로 재발없는 생존기간을 분석하였고, Logrank test로 비교하였으며 Cox 회귀모형으로 독립적인 예측인자를 찾아보았다. 결과: 13명의 환자에서 재발이 있었다. 단변량분석에서는 FIGO병기, MRI 또는 CT에서 측정한 종양의 최대지름, MRI 또는 CT에서 림프절 전이 유무, PET상 림프절 전이의 유무가 재발없는 생존기간에 유의한 차이를 보였고, 나이나 병리학적 암세포의 종류, 원발종양의 최대 표준섭취계수에 따른 환자군 사이에 재발없는 생존기간의 유의한 차이는 없었다. Cox 회귀모형 분석에서는 PET상 림프절 전이의 유무(Exp(β)=6.416, p=0.002)와 MRI 또는 CT에서 림프절 전이 유무(Exp(β)=5.711, p=0.026)만이 독립적으로 재발없는 생존기간과 유의한 관계를 보였으며, PET상 림프절 전이의 유무가 재발없는 생존기간 예측 모형에 가장 크게 기여하였다. 결론: 자궁경부암에서 치료 전 FDG PET의 림프절 전이 유무는 치료 후 예후를 예측할 수 있는 가장 좋은 독립적 예후인자인 반면, 종양의 최대표준섭취계수는 유의한 예후인자가 아니었다. Purpose: In uterine cervical cancer, it is clinically important to predict prognosis on initial staging. We investigated whether abnormally increased FDG uptake of lymph nodes and peak SUV of primary tumor on initial FDG PET can predict prognosis after treatment in cervical cancer patients. Materials and MEthods: Subjects were 74 newly diagnosed cervical cancer patients (50±12yr). Whole body PEt was performed after an injection of F-18. Peak SUV was measured in the primary cervical tumor. Images were interpreted by two nuclear medicine physiciana. Follow-up for the disease-free survival was done in all patients. Survival analysis was done by using the Kaplan-Meier method, and a Longrank test was used to compare survival. Cox regression analysis was followed to find independent predictive factors. Results: Recurrence occurred in 13 patients. In univariate analysis, advanced FIGO stage, large size of primary tumor, positive lymph node on MRI or CT, and positive lymph node on PET were significant prognostic factors to predict recurrence. Peak SUV and cell type of tumor failed to show any significant correlation with disease-free survival. In multivanate analysis, positive lymph node on PET (Exp(β)=6.416, p=0.002) and on CT or MRI (Exp(β)-5.711, p=0.026) were independent prognostic factors for predicting recurrence. Conclusion: In uterine cervical cancer, lymph node metastasis of pretreatment FDG PET is the best independent prognostic factor for predicting recurrence. But, peak SUV was not significant prognostic factor.

오렌지로부터 아플라톡신B₁의 정량분석에 관한 연구

장향동,백광균,구경림,옥선미,최진석,고은주,류성렬 한국공업화학회 2004 응용화학 Vol.8 No.2

Aflatoxin B₁ was known to have the strongest poisonous character among Aflatoxin compounds. To search the production of Aflatoxin B1 according to the change of temperature, relative humidity and incubation days, orange incubated with Aspergillus parasiticus KCCM 35078 was incubated at 20℃, 25℃, 30℃ at relative humidity 60%, 70%, 80% and for incubation time 3, 4, 5, 6, 7 days.. Production of Aflatoxin B₁ shows that the highest production appeared at 25℃ and its relative humidity 70%. The result that was quantitatively analyzed by using HPLC was 77.41ppm, and by using Fluoroscence detector was 87.87ppm. - Production of Aflatoxin B₁ shows that the lowest production appreared at 20℃ and its relative humidity 80%(HPLC), 60%(Fluoroscence detector). The result that was quantitatively analyzed by using HPLC was 4.47ppm, and by using Fluoroscence detector was 4.17ppm. The structure of Aflatoxin B₁ was identify with authentic sample by using instrumental analysis methods of GC/MS, ¹H-NMR, FT-IR respectively.

중심점 탐색없는 지문 정합 알고리즘에 관한 연구

장경식,임재영,최영규 한국기술교육대학교 2003 論文集 Vol.10 No.1

We propose a fingerprint matching algorithm that compares distance and included angle sequence among minutiaes with another's. We defined this sequence as minutiae constellation which has a basic unit is distance and included angle sequence among three minutiaes. This algorithm searches nearest minutiae from a minutiae and repeatedly searches nearest minutiae from just before searched minutiae. It doesn't search core and is independent of translation and rotation because matching stage only uses distance and included angle sequence.

Tufted Angioma와 유사한 소견을 보인 화농성 육아종

장경애,최정철,최지호,성경제,문기찬,고재경 대한피부과학회 1999 대한피부과학회지 Vol.37 No.6

Tufted angiomas are rare slowly progressive vascular lesions found typically in children and young adults, usually involving the trunk and neck. Microscopically, groups of capillary tufts, many uncanalized, were found dispersed at various levels in the dermis. Some authors regarded tufted angioma as a member of lobular capillary hemangiomas. We describe a pyogenic granuloma mimicking acquired tufted angioma on the lip in a 59-year-old woman. We suggest that a term lobular capillary hemangioma$quot; may be preferable in this case.

Ni 치환에 따른 TiV-based 합금의 수소저장 특성

최원경,조태환,배장순 단국대학교 신소재기술연구소 2001 신소재 Vol.10 No.-

체심입방구조를 갖는 TiV_1.4합금의 V성분을 Ni금속으로 부분치환하여 얻은 TiV_0.9Ni_0.5 삼원계합금의 미세 구조와 조성변화를 조사하여 얻어진 branch 합금들의 수소저장 특성에 대하여 검토하였다. TiV_0.9Ni_0.5 합금은 BCC결정구조의 TiV_2.1Ni_0.3 고용체와 (FCC+BCC) 혼합결정구조를 갖는 TiV_0.2Ni_0.8의 금속간화합물로 구성된 multi phase합금이고 수소저장량은 H/M=1.69(P_Eq=0.5 Mpa)로 나타났다. TiV_0.9Ni_0.5 합금을 구성하는 주상조성으로 제조한 TiV_2.1Ni_0.3 고용체의 수소저장량은 H/M=1.99(P_Eq=0.5 MPa)로 상당히 많은 양의 수소를 저장하는 것이 확인되었으며, 고용체합금을 포함하지 않는 금속간화합물 TiV_0.2Ni_0.8의 수소저장량은 고용체나 고용체를 포함하는 합금보다 적은 것이 확인되었다. Hydrogen storage properties of branched alloy determined analysis of microstructure and composition variation for TiV_0.9Ni_0.5 alloy with BCC crystal structure obtained partial Ni substituted V of TiV_1.4 alloy was investigated. Multi phase TiV_0.9Ni_0.5 alloy was consisted TiV_2.1Ni_0.3 solid solution with BCC crystal structure and TiV_0.2Ni_0.8 intermetallics with complex (FCC+BCC) crystal structure and stored hydrogen concentration was H/M=1.69(E_Eq=0.5 MPa). Higher hydrogen storage capacity(H/M=1.99) for TiV_2.1Ni_0.3 solid solution prepared main phase composition of TiV_0.9Ni_0.5 alloy was identified and lower hydrogen storage capacity was observed for TiV_0.2Ni_0.8 intermetallics than solid solution or alloy with solid solution phase.