지난 2년간의 학회지 "신경정신의학" 심사 평가보고

김찬형,김세주,김도관,김성곤,박원명,송동호,박용천,이영문,오강섭,정영철,이상열,김주한,이동영,이헌정,함병주,김율리,김문두,김정진,이강욱,천근아,김재진,홍진표,홍승철 大韓神經精神醫學會 2007 신경정신의학 Vol.46 No.6

Effects of superhydrophobic surfaces on the flow around an NACA0012 hydrofoil at low Reynolds numbers

Lee, Jungjin,Kim, Hyunseok,Park, Hyungmin Springer-Verlag 2018 Experiments in fluids Vol.59 No.7

ScreenX: Public Immersive Theatres with Uniform Movie Viewing Experiences

Lee, Jungjin,Lee, Sangwoo,Kim, Younghui,Noh, Junyong IEEE Computer Society 2017 IEEE transactions on visualization and computer gr Vol.23 No.2

<P>This paper introduces ScreenX, which is a novel movie viewing platform that enables ordinary movie theatres to become multi-projection movie theatres. This enables the general public to enjoy immersive viewing experiences. The left and right side walls are used to form surrounding screens. This surrounding display environment delivers a strong sense of immersion in general movie viewing. However, naive display of the content on the side walls results in the appearance of distorted images according to the location of the viewer. In addition, the different dimensions in width, height, and depth among theatres may lead to different viewing experiences. Therefore, for successful deployment of this novel platform, an approach to providing similar movie viewing experiences across target theatres is presented. The proposed image representation model ensures minimum average distortion of the images displayed on the side walls when viewed from different locations. Furthermore, the proposed model assists with determining the appropriate variation of the content according to the diverse viewing environments of different theatres. The theatre suitability estimation method excludes outlier theatres that have extraordinary dimensions. In addition, the content production guidelines indicate appropriate regions to place scene elements for the side wall, depending on their importance. The experiments demonstrate that the proposed method improves the movie viewing experiences in ScreenX theatres. Finally, ScreenX and the proposed techniques are discussed with regard to various aspects and the research issues that are relevant to this movie viewing platform are summarized.</P>

Association between Estrogen Receptor Gene Polymorphisms and Depression in Post-Menopausal Women: A Preliminary Study

JungJin Kim,ChiUn Pae,MiRan Kim,JungAh Min,KyungHee Kim,ChangUk Lee,Chul Lee,InHo Paik 대한신경정신의학회 2010 PSYCHIATRY INVESTIGATION Vol.7 No.3

Post-menopausal women experience variable biological and psychological changes. The effect of reduced levels of estrogen can effect on post-menopausal depression. Estrogen triggers physiological responses by binding to the estrogen receptor (ER). Two subtypes of ER, ERa and ERb are now known. We investigated the significance of ERa and ERb polymorphisms and post-menopasal depression in this study. Forty three women with post-menopausal depression and 63 post-menopausal women without depression as normal controls were recruited. Polymerase chain reaction-restriction fragment length polymorphism method was used to investigate genotypes of ERa and ERb polymorphisms. Genotypes of PvuII and XbaI polymorphism of ERa receptor were significantly different in patients with post-menopausal depression comparing with controls. Genotypes of ERb did not show association with post-menopausal depression. Our study showed that ERa receptor polymorphism had an association with depression in post-menopausal women. It suggests that investigation of ER genes and their functions might be important for understanding pathophysilogical mechanism of post-menopausal depression.

Rich360 : optimized spherical representation from structured panoramic camera arrays

Lee, Jungjin,Kim, Bumki,Kim, Kyehyun,Kim, Younghui,Noh, Junyong Association for Computing Machinery 2016 ACM transactions on graphics Vol.35 No.4

<P>This paper presents Rich360, a novel system for creating and viewing a 360 degrees panoramic video obtained from multiple cameras placed on a structured rig. Rich360 provides an as-rich-as-possible 360 degrees viewing experience by effectively resolving two issues that occur in the existing pipeline. First, a deformable spherical projection surface is utilized to minimize the parallax from multiple cameras. The surface is deformed spatio-temporally according to the depth constraints estimated from the overlapping video regions. This enables fast and efficient parallax-free stitching independent of the number of views. Next, a non-uniform spherical ray sampling is performed. The density of the sampling varies depending on the importance of the image region. Finally, for interactive viewing, the non-uniformly sampled video is mapped onto a uniform viewing sphere using a UV map. This approach can preserve the richness of the input videos when the resolution of the final 360 degrees panoramic video is smaller than the overall resolution of the input videos, which is the case for most 360 degrees panoramic videos. We show various results from Rich360 to demonstrate the richness of the output video and the advancement in the stitching results.</P>

Lattice preferred orientation of chloritoid and implications for seismic anisotropy

Jungjin Lee,Mainak Mookherjee,Haemyeong Jung,Reiner Klemd 대한지질학회 2018 대한지질학회 학술대회 Vol.2018 No.10

Lattice preferred orientation of talc and implications for seismic anisotropy at high-pressure subduction zones

Jungjin Lee(이정진),Haemyeong Jung(정해명),Reiner Klemd 한국암석학회 2016 한국암석학회 학술발표회 논문집 Vol.2016 No.5

High-Quality Depth Estimation Using an Exemplar 3D Model for Stereo Conversion

Jungjin Lee,Younghui Kim,Sangwoo Lee,Bumki Kim,Junyong Noh IEEE 2015 IEEE transactions on visualization and computer gr Vol.21 No.7

<P>High-quality depth painting for each object in a scene is a challenging task in 2D to 3D stereo conversion. One way to accurately estimate the varying depth within the object in an image is to utilize existing 3D models. Automatic pose estimation approaches based on 2D-3D feature correspondences have been proposed to obtain depth from a given 3D model. However, when the 3D model is not identical to the target object, previous methods often produce erroneous depth in the vicinity of the silhouette of the object. This paper introduces a novel 3D model-based depth estimation method that effectively produces high-quality depth information for rigid objects in a stereo conversion workflow. Given an exemplar 3D model and user correspondences, our method generates detailed depth of an object by optimizing the initial depth obtained by the application of structural fitting and silhouette matching in the image domain. The final depth is accurate up to the given 3D model, while consistent with the image. Our method was applied to various image sequences containing objects with different appearances and varying poses. The experiments show that our method can generate plausible depth information that can be utilized for high-quality 2D to 3D stereo conversion.</P>

High-Quality Depth Map Generation of Humans in Monocular Videos

Jungjin Lee(이정진),Sangwoo Lee(이상우),Jongjin Park(박종진),Junyong Noh(노준용) 한국컴퓨터그래픽스학회 2014 컴퓨터그래픽스학회논문지 Vol.20 No.2

단안 영상에서 3차원 입체영상으로 변환한 결과물의 품질은 장면의 물체들에게 부여한 깊이 정보의 정확도에 의존적이다. 영상의 매 프레임마다 장면의 물체들의 깊이 정보를 수동으로 입력하는 것은 많은 시간을 필요로 하는 노동집약적인 작업이다. 특히, 높은 자유도를 가진 관절형 물체인 인간의 몸은 고품질 입체변환에 있어서 가장 어려운 물체중에 하나이다. 다양한 스타일의 옷, 액세서리, 머리카락들이 만드는 매우 복잡한 실루엣은 문제를 더욱 어렵게 한다. 본 논문에서는 단안 영상에 나타난 인간 오브젝트의 고품질 깊이 정보를 생성하는 효율적인 방법을 제안한다. 먼저, 적은 수의 사용자입력을 기반으로 3차원 템플릿 모델을 순차 관절 각도 제약을 가진 자세 추정 방법을 통해서 영상에 등장하는 2차원 인간 오브젝트에 정합한다. 정합된 3차원 모델로부터 초기깊이 정보를 획득한 뒤, 컬러 세그멘테이션 방법을 기반으로 한 부분 깊이 전파 방법을 통해 세밀한 표현을 보장하며 누락된 영역을 포함하는 최종 깊이 정보를 생성한다. 숙련된 아티스트들의 수작업 결과물과 제안된 방법의 결과물을 비교한 검증 실험은 제안된 방법이 단안 영상에서 동등한 수준의 깊이 정보를 효율적으로 생성한다는 것을 보여준다. The quality of 2D-to-3D conversion depends on the accuracy of the assigned depth to scene objects. Manual depth painting for given objects is labor intensive as each frame is painted. Specifically, a human is one of the most challenging objects for a high-quality conversion, as a human body is an articulated figure and has many degrees of freedom (DOF). In addition, various styles of clothes, accessories, and hair create a very complex silhouette around the 2D human object. We propose an efficient method to estimate visually pleasing depths of a human at every frame in a monocular video. First, a 3D template model is matched to a person in a monocular video with a small number of specified user correspondences. Our pose estimation with sequential joint angular constraints reproduces a various range of human motions (i.e., spine bending) by allowing the utilization of a fully skinned 3D model with a large number of joints and DOFs. The initial depth of the 2D object in the video is assigned from the matched results, and then propagated toward areas where the depth is missing to produce a complete depth map. For the effective handling of the complex silhouettes and appearances, we introduce a partial depth propagation method based on color segmentation to ensure the detail of the results. We compared the result and depth maps painted by experienced artists. The comparison shows that our method produces viable depth maps of humans in monocular videos efficiently.

Engineering Titanium Dioxide Nanostructures for Enhanced Lithium-Ion Storage

Lee, Dae-Hyeok,Lee, Byoung-Hoon,Sinha, Arun K.,Park, Jae-Hyuk,Kim, Min-Seob,Park, Jungjin,Shin, Heejong,Lee, Kug-Seung,Sung, Yung-Eun,Hyeon, Taeghwan American Chemical Society 2018 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.140 No.48

<P>Various kinds of nanostructured materials have been extensively investigated as lithium ion battery electrode materials derived from their numerous advantageous features including enhanced energy and power density and cyclability. However, little is known about the microscopic origin of how nanostructures can enhance lithium storage performance. Herein, we identify the microscopic origin of enhanced lithium storage in anatase TiO<SUB>2</SUB> nanostructure and report a reversible and stable route to achieve enhanced lithium storage capacity in anatase TiO<SUB>2</SUB>. We designed hollow anatase TiO<SUB>2</SUB> nanostructures composed of interconnected ∼5 nm sized nanocrystals, which can individually reach the theoretical lithium storage limit and maintain a stable capacity during prolonged cycling (i.e., 330 mAh g<SUP>-1</SUP> for the initial cycle and 228 mAh g<SUP>-1</SUP> for the 100th cycle, at 0.1 A g<SUP>-1</SUP>). In situ characterization by X-ray diffraction and X-ray absorption spectroscopy shows that enhanced lithium storage into the anatase TiO<SUB>2</SUB> nanocrystal results from the insertion reaction, which expands the crystal lattice during the sequential phase transition (anatase TiO<SUB>2</SUB> → Li<SUB>0.55</SUB>TiO<SUB>2</SUB> → LiTiO<SUB>2</SUB>). In addition to the pseudocapacitive charge storage of nanostructures, our approach extends the utilization of nanostructured TiO<SUB>2</SUB> for significantly stabilizing excess lithium storage in crystal structures for long-term cycling, which can be readily applied to other lithium storage materials.</P> [FIG OMISSION]</BR>