• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.1851_1852
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• 2009

본 논문은 차량 영역에 나타나는 수평, 수직 에지 특성만을 이용하여 빠르고 효율적으로 차량을 검출하는 방법을 제안한다. 차량을 포함하는 입력영상의 긴 수직 에지 성분을 찾아 차량의 후보 영역을 결정한다. 영상의 에지 성분의 누적 대신 연속적으로 나타나는 긴 수직 에지 성분을 찾음으로써 차량의 후보 영역의 검출과 동시에 중요한 정보를 담고 있는 도로와 접하는 차량의 하단부를 함께 검출한다. 후보 영역 내에서 차량과 비 차량을 구분하는 검증 단계에서는 차량의 후면의 대칭성(Symmetry)을 이용하여 후보 영역 내에서 차량이 있을 가능성이 있는 바닥 점 위에서 좌측과 우측의 유사도(Matching rate)를 이용하여 차량과 비 차량을 판별한다. 기존의 템플릿 기반 방법이나 외관 기반 방법이 아닌 에지 성분만을 이용하여 후보 영역을 결정하고 검증하기 때문에 다른 검출 기법들에 비해 비교적 검출 시간이 짧고 실시간 차량 검출에 적합하다.

• Journal of Korean Ophthalmic Optics Society
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• v.6 no.1
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• pp.59-63
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• 2001

Once refractive error of the eye was fully corrected. Polarization Test was used to investigate binocular vision function. As the results of phoria measurement of Korean adults for 53males and 59 females, orthophoria in 27.68%, esophoria in 12.50%, exophoria in 48.21%, verical phoria in 3.75%, esophoria(+verical phoria) in 2.68%, and exophoria(+vertical phoria) in 5.36%, respectively. Horizontal phoria is below $3{\Delta}$ mostly and verical phoria is below $1{\Delta}$.

• Proceedings of the Korea Contents Association Conference
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• 2012.05a
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• pp.431-432
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• 2012

상수도관의 노후화에 따라 빈번히 발생하는 상수관망의 용수공급 중단의 피해를 저감하고 관망내에서 발생하는 용수의 수질저하를 방지하기 위하여 용수공급 블록단위에 소규모의 수직형 정수처리 시설을 설치하는 방안이 연구되고 있다. 이와 같이 설치되는 수직형 정수처리 시설을 기존 관망내에 적절한 위치에 설치하여야 최대의 효과를 가져올 수 있다. 이를 위하여 EPANET을 활용하여 수직형 정수처리 시설을 다양한 지점에 설치한다고 가정한 후 개별 설치지점별 수리학적 안정성을 절점의 압력변동폭으로 정량화하여 최적위치를 결정할 수 있는 방법을 제안하였다. 제안된 방법을 국내 A 관망에 적용하여 적용성을 검증하였다.

• Journal of the Korean Magnetics Society
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• v.16 no.3
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• pp.173-177
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• 2006

We have investigated the magnetoresistance (MR) effect of the spin valve structures composed of perpendicularly magnetized Pd/Co multilayers, with changing the space layer (Pd or Cu) thickness, the stacking number of the Pd/Co multilayers, and the Co insertion-layer thickness. The Cu space layer showed larger MR ratio than the Pd space layer. The Co insertion-layer between Cu layer and pinned layer enhanced the MR ratio about three times. The maximum MR ratio of 7.4 % was established in the sample with the Co insertion-layer thickness of 0.62 and 1.01 nm.

• Journal of the Korean Geotechnical Society
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• v.19 no.5
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• pp.109-122
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• 2003

In order to release the pressure fluctuations and micro-pressure wave induced by the entering of train into the small cross sectional tunnel, it has been reported that the construction of air shaft has more advantages with respect to economy and constructability than the enlargement of cross section of existing tunnel. The field monitorings and analytical studies were conducted simultaneously in this study to analyze the mechanical behavior of existing railway tunnel, new cross tunnel and new shaft by the construction of new shaft nearby. The results showed that the minimum distance from existing tunnel to new shaft which secures the stability of existing tunnel was found to be half diameter of existing tunnel. On the three dimensional mechanical behavior of existing tunnel by the construction of new shaft, the results from the analytical study and field monitoring had a similar trend. The analytical study and field monitoring results, however, produced somewhat different results on the mechanical behavior of new shaft itself. These conclusions induce that the analytical method which has been applied on the analyses of horizontal tunnel could not be applied in the same way on the analysis of vertical shaft.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2003.10a
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• pp.272-272
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• 2003

• 발명특허
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• v.27 no.5 s.311
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• pp.68-74
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• 2002

본 발명은 키토산으로 이루어진 무수히 많은 갯수의 박막필름이 시트 평면에 수직, 수평 또는 경사 방향으로 일정간격의 공간을 유지하면서 적충되어서 라멜라구조를 형성하고 이 박막필름들이 일정한 간격으로 가지런히 나열되어 형성된 키토산 마이크로 플레이크로 이루어진 층상 격막시트에 관한 것이다. 두께 $1\mu{m}$내지 $50\mu{m}$로 라멜라구조를 이루는 키토산 박막필름이 $1\mu{m}$내지 $10000\mu{m}$의 공기간격을 두고 누적층을 형성하고 시트평면과$0^{\circ}C$내지$180^{\circ}C$사이의 일정 각도로 균일하게 배열되어 있어 수직, 수평 또는 경사방향으로 키토산 박막필름이 가지런히 배열되어 있는 키토산으로 조성된 수용성 층상 격막시트에 관한 것이다. 본 발명은 키토산을 약산성 액상에서 용해, 숙성 시켜 추출 고화 시키는 과정에서 수직, 수평 및 경사방향으로 키토산 마이크로 플레이크가 층상 라멜라구조를 이루는 키토산 격막시트를 형성시켜 줌으로 임상의학적 적용시 각각의 키토산 박막필름 사이의 균일한 공간으로 다양한 약물의 적용이 가능하며 특히 액상의 약재를 적용시 모세관의 원리에 따라서 약물이 원활하게 공급되는 약전성이 매우 우수하고 약물의 포집성이 획기적으로 부과된 재료로 사용될 수 있으며 키토산을 용해시켜 이용하는 산업에서 물에 신속하고 완전한 용해특성을 나타내는 키토산 원료물질로 사용될 수 있는 것이다.

• Tunnel and Underground Space
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• v.10 no.2
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• pp.173-179
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• 2000

The influence of the plastic flow rules on the elasto-plastic behaviour of a discrete joint element was investigated by performing the numerical direct shear tests under both constant normal displacement and normal displacement conditions. The finite interface elements obeying Plesha’s joint constitutive law was used to allow the relative motion of the rock blocks on the joint surface. Realistic results were obtained in the tests adopting the non-associated flow rule, while the associated flow rule overestimated the joint dilation. To overcome the computational drawbacks coming from the non-symmetric element stiffness matrix in the conventional non-associated plasticity, the symmetric formulation of the tangential stiffness matrix for a non-associated joint element was proposed. The symmetric elasto-plastic matrix it derived by assuming an imaginary equivalent joint with associated flow rule which shows the same plastic response as that of original Joint with non-associated flow rule. The validity of the formulation was confirmed through the numerical direct shear tests under constant normal stress condition.

• Journal of the Korea Concrete Institute
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• v.17 no.5 s.89
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• pp.687-694
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• 2005

In current design practice, the thickness of the floor slab has been determined to satisfy requirement for deflection control. However, previous study shows that the floor thicknesses in residential buildings may not satisfy the floor vibration criteria, even though the thickness is determined by the serviceability requirements in current design provisons. Thus it is necessary to develop the procedure to determine slab thickness that satisfies the floor vibration criteria. This study attempts to propose slab thickness for flat plate slab systems that satisfies floor vibration criteria against occupant induced floor vibration(heel drop load). Two boundary conditions(simple and fixed support), three square flat plates(4, 6, 8m), and five concrete strength($18\~30$ MPa) are considered. Since there are large uncertainties in loading and material properties, probabilistic approach is adopted using Monte-Carlo simulation procedures.

• The korean journal of orthodontics
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• v.34 no.4 s.105
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• pp.313-324
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• 2004

The Purpose of this study was to investigate the predictors of relapse in orthodontic treatment of skeletal Class III malocclusion in growing patients. A total of 55 patients were studied and all subjects were divided into two groups according to their stability in the post-treatment stage. Of the sample, 33 patients were included in the stable group and the remaining 22 were assigned to the relapse group. Cephalometric data of the pre-treatment stage was taken and compared between the stable and relapse group. The following results were obtained through t-test: 1. This study presented statistical evidence to show that the major skeletal determinant of prognosis in Class III orthodontic treatment was not anteroposterior discrepancy .but vertical discrepancy, especially within the AB-maxillo mandibular triangle. Vertical angular measurements that showed statistically significant differences were AB-MP and ODI(P<0.01) and the vortical ratio measurements were MP-P/AL and PP-P/AL(P<0.05). 2. Relapse tendency increased with the steep occlusal Plane, especially the steep lower occlusal plane. As to occlusal plane, there were statistically significant differences in OP(L)-PP, OP-PP, AB-OP(L) and Wits appraisal(P<0.05). This study claimed that anteroposterior discrepancy was not necessarily the proper criteria to predict relapse. Vertical discrepancy had a significant effect on post-treatment stability.