• 대한기관식도과학회지
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• 제17권2호
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• pp.116-119
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• 2011

Computed tomography with virtual bronchoscopy shows inner shape of trachea and major bronchi with three-dimensional images. Virtual bronchoscopy can be used in cases of suspected foreign body aspiration. Virtual bronchoscopy shows the exact location of the obstructive lesion before conventional bronchoscopy. If the chest radiography is normal or suggests aspirated foreign body, virtual bronchoscopy can be considered before conventional bronchoscopy. We experienced a case of false-tooth foreign body extracted under bronchoscopy. In this case, virtual bronchoscopy was made retrospectively giving useful information about shape and orientation regarding foreign body.

• 한국전산유체공학회지
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• 제12권1호
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• pp.1-8
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• 2007

A code is developed using the hybrid Cartesian/immersed boundary method and it is applied to simulate flows around a three-dimensional deforming body. A new criterion is suggested to distribute the immersed boundary nodes based on edges crossing a body boundary. Velocities are reconstructed at the immersed boundary nodes using the interpolation along a local normal line to the boundary. Reconstruction of the pressure at the immersed boundary node is avoided using the hybrid staggered/non-staggered grid method. The developed code is validated through comparisons with other experimental and numerical results for the velocity profiles around a circular cylinder under the forced in-line oscillation and the pressure coefficient distribution on a sphere. The code is applied to simulate the flow fields around a plate whose tail is periodically flapping under a translation. The effects of the velocity and acceleration due to the deformation on the periodic shedding of pairs of tip vortices are investigated.

• 한국가축번식학회지
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• 제25권1호
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• pp.51-61
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• 2001

본 연구에서는 한우 수소에서 유래된 체세포로 핵 이식한 복제 난자의 발달능력을 조사하였다. 종모우의 귀세포를 배양하면서 공여핵으로 사용하였고, 수핵란은 도축장에서 얻은 난소에서 난구-난자 복합체를 채취한 후, TCM 199 배양액에서 20시간 정도 체외 배양하여 사용하였다. 성숙된 난자는 Cytochalasin B가 있는 dPBS에서 핵과 극체를 제거하였고, 이어 이 난자에 귀의 섬유 아세포의 핵을 삽입시키고 전기 자극법에 의해서 음합하였다. 재조합된 난자들은 Ionomycine과 6-dimethylamino-purine으로 활성화 한 후, 7.5일 동안 C $R_{1aa}$ 배양액에 배양하였다 총 524개의 난자가 핵 이식되었고, 응합된 난자중 65.6% (277/422)의 난자가 난할이되었으며, 그 중 30.7% (85/277)의 난자가 상실배에서 배반포까지 발달하였다. 계대배양에 따른 제조합된 난자의 체외 발달능력은 차이가 없었다. 공여 세포에 의한 외래 미토콘드리아의 분포 및 생존 여부를 조사하기 위하여 Mito Tracker로 공여 세포의 미토콘드리아를 염색하여 핵이 제거된 난자와 융합하였다. 외래 미토콘드리아는 초기 배아 발달 단계에서는 발견이 되었지만, 급격히 사라졌다. Mito Tracker 염색은 재조합된 난자의 발달율에는 지장을 주지는 않았다. 이러한 연구 결과는 한우 수소의 체세포를 이용한 핵 이식에 의해 이식 가능한 난자를 생산 할 수 있음을 보여 주는 것이다.다.

• 복식문화연구
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• 제22권1호
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• pp.1-15
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• 2014

Entering the twentieth century, corsets began to disappear with the tendency of concentrating on slim bodies and youth. As corsets proceeded to be discarded, they began to be internalized as a means of controlling the body; 'muscular corset' takes hold. However, the internalized corset increasingly appears to be externalized again in contemporary fashion. This study investigates how natural body is reconstructed as socio-cultural image drawing on the relationship between the signifier and signified of corset. As for the research methodology this study conducts literature survey to investigate the internalization of corset. This study proceeds to examine the subjects of fashion collections from 1980 to 2010 and samples the outfits which represent the externalization of corset through case analysis. Through the discussion of the study, the relationship of signifier and signified in the externalization of corset is argued as follows: first, by maintaining signifier and signified of the traditional corset as underwear, aggressive eroticism of corset has been observed, second, by perceiving corset as the agency of the body, fetishism of corset dissociates the function of sexual object from corset while distorting the relationship of signifier and signified, third, through embodying the notion of muscular corset literally, the ironical representation of corset as a torturing device of female body deconstructs the traditional relation of signifier and signified of corset.

• 대한조선학회논문집
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• 제43권5호
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• pp.538-549
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• 2006

A code is developed to simulate a viscous flow field around a deformable body using the hybrid Cartesian/immersed boundary method. In this method, the immersed boundary(IB) nodes are defined near the body boundary then velocities at the IB nodes are reconstructed based on the interpolation along the normal direction to the body surface. A new method is suggested to define the IB nodes so that a closed fluid domain is guaranteed by a set of IB nodes and the method is applicable to a zero-thickness body such as a sail. To validate the developed code, the vorticity fields are compared with other recent calculations where a cylinder orbits and moves into its own wake. It is shown the code can handle a sharp trailing edge at Reynolds number of $10^5$ under moderate requirements on girds. Finally the developed code is applied to simulate the vortex shedding behind a deforming foil with flapping tail like a fish. It is shown that the acceleration of fluids near the flapping tail contributes to the generation of the thrust for propulsion.

• 한국컴퓨터그래픽스학회논문지
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• 제29권5호
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• pp.11-20
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• 2023

본 논문에서는 손 동작을 포함한 전신 동작 생성이 가능하고 동작 생성 딜레이를 조절할 수 있는 새로운 딥러닝 기반 동작 복원 기술을 제안한다. 제안된 방법은 범용적으로 사용되는 센서인 바이브 트래커와 딥러닝 기술의 융합을 통해 더욱 정교한 동작 복원을 가능하게함과 동시에 IK 솔버(Inverse Kinematics solver)를 활용하여 발 미끄러짐 현상을 효과적으로 완화한다. 본 논문은 학습된 오토인코더(AutoEncoder)를 사용하여 트래커 데이터에 적절한 캐릭터 동작의 실시간 복원이 가능하고, 동작 복원 딜레이를 조절할 수 있는 방법을 제안한다. 복원된 전신 동작에 적합한 손 동작을 생성하기 위해 FCN(Fully Connected Network)을 사용하여 손 동작을 생성하고, 오토인코더에서 복원된 전신 동작과 FCN 에서 생성된 손 동작을 합쳐 손 동작이 포함된 캐릭터의 전신 동작을 생성할 수 있다. 앞서 딥러닝 기반의 방법으로 생성된 동작에서 발 미끄러짐 현상을 완화시키기 위해 본 논문에서는 IK 솔버 를 활용한다. 캐릭터의 발에 위치한 트래커를 IK 솔버의 엔드이펙터(end-effector)로 설정하여 캐릭터의 발 움직임을 정확하게 제어하고 보정하는 기술을 제안함으로써, 생성된 동작의 전반적인 정확성을 향상시켜 고품질의 동작을 생성한다. 실험을 통해, 본 논문에서 제안한 딥러닝 기반 동작 복원에서 정확한 동작 생성과 사용자 입력에 따라 프레임 딜레이 조정이 가능함을 검증하였고, 생성된 전신 동작의 발미끄러짐 현상에 대해 IK 솔버가 적용되기 이전 전신 동작과 비교하여 보정에 대한 성능을 확인하였다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제35권6호
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• pp.474-480
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• 2009

These is a cases of chronic suppurative osteomyelitis occurred in the mandibular body to condyle of 48-year-old male patient. Extensive bone destruction was noted on the right mandibular body, angle, ascending ramus, mandibular notch and condylar region. We made a treatment plan that radicular mandibular resection from body to condyle and mandibular reconstruction with vascularized fibular flap at first time. But, we could observe marked bone regeneration with only mild curettage, local wound care and massive antibiotic therapy. So we preserved the anterior ramus portion of mandible. Defected mandibular condyle was reconstructed with costochondral graft. In this paper we present the case of a patient who has chronic osteomyelitis in mandibular area.

• 대한조선학회논문집
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• 제45권4호
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• pp.379-388
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• 2008

A hybrid Cartesian/immersed boundary code is expanded to simulate flow field around a three-dimensional body which undergoes large dynamic deformation. Immersed boundary nodes are automatically distributed based on the edges crossing triangles on body boundary. Velocity vectors are reconstructed at those immersed boundary nodes along local normal lines to the boundary. The reconstruction of pressure is avoided using the hybrid staggered/non-staggered grid method. The developed code is validated through comparisons with other results on laminar flow over a sphere. The code is applied to simulate flow around a foil which is attached to a body of revolution and rotates under periodic deformation. The periodic variation of the tip vortex is observed and the effects of the deformation on hydrodynamic force acting on the body are investigated.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권11호
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• pp.4395-4412
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• 2020

The multisource image fusion has become an active topic in the last few years owing to its higher segmentation rate. To enhance the accuracy of multimodal pig-body feature segmentation, a multisource image fusion method was employed. Nevertheless, the conventional multisource image fusion methods can not extract superior contrast and abundant details of fused image. To superior segment shape feature and detect temperature feature, a new multisource image fusion method was presented and entitled as NSST-GF-IPCNN. Firstly, the multisource images were resolved into a range of multiscale and multidirectional subbands by Nonsubsampled Shearlet Transform (NSST). Then, to superior describe fine-scale texture and edge information, even-symmetrical Gabor filter and Improved Pulse Coupled Neural Network (IPCNN) were used to fuse low and high-frequency subbands, respectively. Next, the fused coefficients were reconstructed into a fusion image using inverse NSST. Finally, the shape feature was extracted using automatic threshold algorithm and optimized using morphological operation. Nevertheless, the highest temperature of pig-body was gained in view of segmentation results. Experiments revealed that the presented fusion algorithm was able to realize 2.102-4.066% higher average accuracy rate than the traditional algorithms and also enhanced efficiency.

• 오토저널
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• 제6권4호
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• pp.54-61
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• 1984

Numerical calculation of the flow field past a passenger car was carried out by using a panel method with a small computer of 5Mbyte memory size. The shape of car body was simplified and reconstructed by 2180 panels on which a constant strength sink (or source) was distributed. The separation of flow from the surface and the wake flow were not considered in the calculation because of the computer memory limitation. All of the results of calculation were presented by using a 3-dimensional computer graphics. In spite of small memory size of computer, generally good agreements were obtained, except the separated region, from the comparison of pressure distribution between numerical analysis and wind tunnel experiment with 1/5 scaled model.