• Science of Emotion and Sensibility
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• v.1 no.1
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• pp.181-197
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• 1998

전정기관은 자세의 조절에 관여하지만, 전정기관의 손상은 현기증 및 자세부조화를 초래한다. 본 연구에서는 현기증의 원인을 규명할 목적으로 전정기능을 평가할 수 있는 정현파 회전자극시스템을 개발하고자 하였다. 정현파 회전자극시스템은 회전의자와 구동 및 분석프로그램으로 구성하였으며, DC 서보모터로 구동되는 회전의자는 0.01-0.64 Hz의 주파수범위에서 60 ˚/sec의 초고속도로 정현파 회전한다. 현기증 환자에서 전정기능을 평가하기 위하여 전정안구반사, 시운동성 전정안구반사 및 시각의 억제에 의한 전정안구반사를 측정하여 안구운동의 이득, 위상, 대칭성 등을 산출하도록 정현파 회전자극시스템을 개발하였으며, 정상 성인에서 시험한 결과 신뢰성있는 성적을 얻었다. 따라서 본 시스템은 현기증 환자의 진단 및 치료정도를 판정할 수 있으르로 임상적으로 널리 사용할 수 있을 것으로 사료된다.

• Journal of the Korean Institute of Telematics and Electronics B
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• v.29B no.10
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• pp.37-45
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• 1992

For a precise manipulator control in the presence of environmental uncertainties, it has long been recognized that the robot should be controlled in a task-referenced space. In this respect, an effective visual servo control system for robot manipulators based on neural networks is proposed. In the proposed control system, a Backpropagation neural network is used first to learn the mapping relationship between the robot's joint space and the video image space. However, in the real control loop, this network is not used in itself, but its first and second derivatives are used to generate servo commands for the robot. Second, and Adaline neural network is used to identify the approximately linear dynamics of the robot and also to generate the proper joint torque commands. Computer simulation has been performed demonstrating the proposed method's superior performance. Futrhermore, the proposed scheme can be effectively utilized in a robot skill acquisition system where the robot can be taught by watching a human behavioral task.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2003.11a
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• pp.337-344
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• 2003

In this study, the maintenance process by the servo manipulator for the parts of the equipment that cannot be reached by MSM in the hot cell was developed. To do this, the virtual mock up is implemented using virtual prototyping technology. And, Using this mock-up, the workspace of the manipulators In the hot cell and the operator's view through the wall-mounted lead glass are analyzed. And the path planning of the servo manipulator using the collision detection of the virtual mockup is established. Also, the maintenance process for the parts of the equipment that are located out area of the MSM's workspace by the servo manipulator is proposed and verified through the graphic simulation. The proposed remote maintenance process of the equipment can be effectively used in the real hot cell operation. Also, the implemented virtual mock-up of the hot cell can be effectively used in analyzing the various hot cell operation and in enhancing the reliability and safety of the spent fuel management.

• Journal of Korean Society of Transportation
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• v.34 no.3
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• pp.248-262
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• 2016

The study documents the analysis on characters and symbols shown in the pavement markings in the perspective of mathematics educators. The purpose of this study is to propose a pavement marking method that can enhance readability from the driver's eye position. To this end, this study analyzed the figure of the pavement markings that can be actually recognized by the projective geometry perspective. As a result, it proposed alternatives to the current pavement markings by introducing the concept of the compression ratio. Results of the study are as follows. First, the rule was established to obtain the compression ratio. If the observation of two viewing angles are x and y, then the compression ratio S is ${\sin}y/{\cos}\(\frac{x-y}{2}\)$. Second, we presented two alternatives to the pavement marking method for the displayed information. One is a method for improving the pavement markings in terms of the compression ratio, the other is a method by varying vertical length of the pavement markings while holding its width constant. Based on the outcomes from this study, a mathematical analysis can be further studied for the perception of speed according to the types of pavement marking line.

• Journal of the Korean Society of Costume
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• v.33
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• pp.143-156
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• 1997

와관과 실체의 갈등은 문학작품의 주제 중에서 가장 보편적이면서도 복잡한 양상을 지니고 있다 희곡 Macbeth에 있어서 이주제는 Shakespeare의 어느 작품에서보다도 핵심적인 역할을 하며 특히 외관과 실체의 주제를 시각적으로 보여주는 복식이미저리는 그의 주제를 상징적으로 나타내는 데 효과적일 뿐만 아니라 극적 분위기 창조 및 무대사에서배우들의 의상변화로 인한 시각적이미저리 효과를 극대화 시키고 있다 본 연구의 목적은 Macbeth에 내재된 복식 이미저리를 고찰하고 이를 가장 최근에 공연된 macbeth의 무대의상에 적용 분석함으로써 무대의상 제작시 복식 이미저리의 효과적인 무대적용 여부를 파악하는 것이다.연구의 방법은 먼저 이론적인 배경으로 희곡 Macbeth의 본문을 분석하여 복식이미지저리와 관계된느 대사 및 지문 등을 추출한 다음이를 하나의 케이스 연구대상으로 선정된 1996 RSC극단 공연의 Macbeth 무대의상에 적용하여 분석 고찰 하였다 본 연구에서 얻어진 결론은 다음과 같다 첫째 자신의 실체를 파악하지 못한 인물이나 혼동하는 인물은 자신의 신분에 맞지 않은 남의 의상을 적응기간조차 없이 착용함으로써 결국은 자신을 파멸로 몰고가는 복식 이미저리가 제시되어 있었다 둘째 자신의 실체를 분명히 지각하고 있는 인물들은 새로운 복식이나 신분에의 적응은 많은 시간과 노력을 요한다는 것을 매우 잘 파악하고 있었으며 이것은 그들의 대사 중에 구체적으로 제시되어있었다 1막1장의 Banquo 의 대사 중에 나오는'새로운복식'과 '새로운 신분'에 비유 2막 4장의 macduff의 대사중에 나오는 '새로브'와 '헌로브'의 비유 5막 2장의 Caithness의 '자제력의혁대'등의 비유는 복식이미저리의 구체적인 표현으로 분석되었다. 셋째 복식 이미저리의 측면에 1996 RSC의 Macbeth 무대의상을 분한 결과 이의상들에는 '난쟁이가 훔쳐 입은 거인의 옷' 으로 대표되는 복식 이미저리가 직접적으로 제시되지는 않았지만 공연전체를 통하여 무대장치 및 의상에 변화를 주지 않음으로써 이 작품의 초시한성과 복식이미저리를 오히려 역설적으로 표현하고 있는 것으로 파악되었다. 따라서 이공연의 의상 계획은 복식 이미저리의 역설적인 한 표현으로 분석되었으며 관객에게 등장인물의 외곤은 그 실체를 그대로 반영한다는 Shakespeare 본래의 의도를 잘 보여주는 의상계획으로 파악되었다 이러한 결과는 Shakespeare극의 무대의상 디자인 및 제작시 무대의상이 단순한 무대의상 그 이상의 의미로 고려되어져야 함을 보여주며 이는 관객에세 의미 깊은 메시지로 전달될 수 있을 것으로 사료된다.

• Applied Microscopy
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• v.32 no.1
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• pp.17-30
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• 2002

The retinae of Todarodes pacificus and Octopus minor are divided into four layers that are an outer segment, a rod base region, an inner segment, and a plexiform layer, respectively. The retina of Octopus minor is about $20{\mu}m$ thicker ($400{\sim}420{\mu}m$) than that of Todarodes pacificus ($385{\sim}400{\mu}m$). A retina is composed of visual cells and supporting cells. The microvilli of length $0.6{\sim}0.7{\mu}m$ are packed densely on top of the supporting cells of Octopus minor while they are not found in Todarodes pacificus. The visual cells and supporting cells have pigment granules that exclude light. In case of Todarodes pacificus, the pigment granules of the visual cell are larger ($2.0{\times}0.5{\mu}m$) than those of the supporting cell ($1.0{\times}0.3{\mu}m$). But, the sizes of both cells are similar in Octopus minor. In the upper portion of a visual cell, microvilli shaped like a comb are forming a rhabdome (diameter, 60 nm) of a hexagonal structure. The rhabdome consists of 4 rhabdomere and the total area of a rhabdom of Octopus minor is larger than that of Todarodes pacificus. The synaptosome constructing a plexiform layer in Todarodes pacificus are divided into two types, each of which possess electron dense-core vesicles and electron lucent vesicles, respectively. Octopus minor also has two types of synaptosomes but each type comprises a mixture of electron dense vesicles and electron lucent vesicles, and electron lucent vesicles only, respectively, which is different from the case of Todarodes pacificus.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.21 no.1
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• pp.62-72
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• 1997

High flexibility and productivity using industrial robots are being achieved in manufacturing lines with off-line robot programmings. A good off-line programming system should have functions of robot modelling, trajectory planning, graphical teach-in, kinematic and dynamic simulations. Simulated results, however, can hardly be applied to on-line tasks until any calibration procedure is accompained. This paper proposes a visual calibration scheme in order to provide a calibration tool for our own off-line programming system of SCARA robots. The suggested scheme is based on the position-based visual servoings, and the perspective projection. The scheme requires only one camera as it uses saved kinematic data for three-dimensional visual calibration. Predicted images are generated and then compared with camera images for updating positions and orientations of objects. The scheme is simple and effective enough to be used in real time robot programming.

• The Journal of the Acoustical Society of Korea
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• v.18 no.2
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• pp.66-76
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• 1999

This paper proposes that can take at high speed the information of binocular disparity with moving translational and forward stereo camera to the extent that does not occur the problem of a correspondence point. It shows that in case of stereo vision with translational motion, can take the information of binocular disparity being devoid of error and putting high confidence in, and that in case of stereo vision with forward motion, can take the horizontal component which can not be detected in common stereo vision. Besides, the stereo vision can be done at high speed due to being bright and small a correspondence point comparing not to do, because a correspondence between right and left images is previously limited. But there are problem that a resonable information of binocular disparity can not be taken, if the vicinity of center of image is in accord with the region of occlusion in stereo vision with forward motion.

• Journal of Digital Convergence
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• v.16 no.10
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• pp.421-426
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• 2018

For an artwork, color, shape and structure are key factors to create emotional atmosphere of the wrok. And it is fair to say that color is the most important element of the work. The tone of color reflects the joys and sorrows of the picture and the severity of the work's plot. The audience is to be attractted by colors' harmonious or passionate in this visual feast. Fusion controlling of color tone is mainly determined by color gamut that accounted for the vast area of the picture.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.737-739
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• 2023

몰입형 가상현실 시스템은 더 나은 3차원 시각정보를 제공할 수 있어, 의료계에서 해부학에 대한 이해를 높이는 데 사용되고 있다. 우리는 몰입형 가상현실에서 다중 사용자가 함께 MRI 영상으로부터 생성된 볼륨 렌더링 된 객체를 관찰하고 수술을 계획할 수 있는 시스템을 개발하여 소개하고자 한다.