167 research outputs found
Korean Church Planters’ Perception on Church Planting Education
This studyseeks to understand how Korean church planters perceive the church planting education that they received. This study employs the qualitative approach, which uses words and open-ended questions to explore and understand the meaning that individuals or groups ascribe to a social or human problem. To collect data, I interviewed nine church planters. I analyzed, interpreted, and wrote data as soon as possible. In addition, I collected other data. I also compared different data with each other to generate categories, and it was done consistently. The followings are the findings. While their passion for church planting was great and their assumptions and lack of infrastructure inhibited their preparation for church planting, they learned through their various experiences and social networks
Korean Church Planters’ Perception on Church Planting Education
This studyseeks to understand how Korean church planters perceive the church planting education that they received. This study employs the qualitative approach, which uses words and open-ended questions to explore and understand the meaning that individuals or groups ascribe to a social or human problem. To collect data, I interviewed nine church planters. I analyzed, interpreted, and wrote data as soon as possible. In addition, I collected other data. I also compared different data with each other to generate categories, and it was done consistently. The followings are the findings. While their passion for church planting was great and their assumptions and lack of infrastructure inhibited their preparation for church planting, they learned through their various experiences and social networks
LInKs "Lifting Independent Keypoints" -- Partial Pose Lifting for Occlusion Handling with Improved Accuracy in 2D-3D Human Pose Estimation
We present LInKs, a novel unsupervised learning method to recover 3D human
poses from 2D kinematic skeletons obtained from a single image, even when
occlusions are present. Our approach follows a unique two-step process, which
involves first lifting the occluded 2D pose to the 3D domain, followed by
filling in the occluded parts using the partially reconstructed 3D coordinates.
This lift-then-fill approach leads to significantly more accurate results
compared to models that complete the pose in 2D space alone. Additionally, we
improve the stability and likelihood estimation of normalising flows through a
custom sampling function replacing PCA dimensionality reduction previously used
in prior work. Furthermore, we are the first to investigate if different parts
of the 2D kinematic skeleton can be lifted independently which we find by
itself reduces the error of current lifting approaches. We attribute this to
the reduction of long-range keypoint correlations. In our detailed evaluation,
we quantify the error under various realistic occlusion scenarios, showcasing
the versatility and applicability of our model. Our results consistently
demonstrate the superiority of handling all types of occlusions in 3D space
when compared to others that complete the pose in 2D space. Our approach also
exhibits consistent accuracy in scenarios without occlusion, as evidenced by a
7.9% reduction in reconstruction error compared to prior works on the Human3.6M
dataset. Furthermore, our method excels in accurately retrieving complete 3D
poses even in the presence of occlusions, making it highly applicable in
situations where complete 2D pose information is unavailable
Temporally coherent 4D reconstruction of complex dynamic scenes
This paper presents an approach for reconstruction of 4D temporally coherent
models of complex dynamic scenes. No prior knowledge is required of scene
structure or camera calibration allowing reconstruction from multiple moving
cameras. Sparse-to-dense temporal correspondence is integrated with joint
multi-view segmentation and reconstruction to obtain a complete 4D
representation of static and dynamic objects. Temporal coherence is exploited
to overcome visual ambiguities resulting in improved reconstruction of complex
scenes. Robust joint segmentation and reconstruction of dynamic objects is
achieved by introducing a geodesic star convexity constraint. Comparative
evaluation is performed on a variety of unstructured indoor and outdoor dynamic
scenes with hand-held cameras and multiple people. This demonstrates
reconstruction of complete temporally coherent 4D scene models with improved
nonrigid object segmentation and shape reconstruction.Comment: To appear in The IEEE Conference on Computer Vision and Pattern
Recognition (CVPR) 2016 . Video available at:
https://www.youtube.com/watch?v=bm_P13_-Ds
Unsupervised Reconstruction of 3D Human Pose Interactions From 2D Poses Alone
Current unsupervised 2D-3D human pose estimation (HPE) methods do not work in
multi-person scenarios due to perspective ambiguity in monocular images.
Therefore, we present one of the first studies investigating the feasibility of
unsupervised multi-person 2D-3D HPE from just 2D poses alone, focusing on
reconstructing human interactions. To address the issue of perspective
ambiguity, we expand upon prior work by predicting the cameras' elevation angle
relative to the subjects' pelvis. This allows us to rotate the predicted poses
to be level with the ground plane, while obtaining an estimate for the vertical
offset in 3D between individuals. Our method involves independently lifting
each subject's 2D pose to 3D, before combining them in a shared 3D coordinate
system. The poses are then rotated and offset by the predicted elevation angle
before being scaled. This by itself enables us to retrieve an accurate 3D
reconstruction of their poses. We present our results on the CHI3D dataset,
introducing its use for unsupervised 2D-3D pose estimation with three new
quantitative metrics, and establishing a benchmark for future research
Improvement of Diagnosis-Supplement System for Basic Academic Skill based on Affordance Theory in the Context of HCI
The purpose of this study is to apprehend a problem of user affordance and to suggest an improvement plan to make the better usability of Diagnosis-Supplement System for basic academic skill. Starting in 2013, from 5 cities and provinces, this system was developed, and in 2015, it was completed construction in all (17) provinces. Now, this system serves diagnosis test and supplement study materials for underachievement students from 3rd grade to 8th grade. As of 2015, the role of this system is gradually increased that 16 million students, about 4% of pupils throughout the country are now using it. In turn, this study tries to analyze various ranging requirements of teachers and experts by doing focus group interview in terms of user affordance and try to suggest the way to improve this system for the sustainable use. Henceforth the results of this study, which includes specific problems of physical, cognitive, sensual affordance and a design prototype to improve these problems, can be an important base material for the process of improving Diagnosis Supplement System for Basic Academic Skill with the effective and intuitive syste
General Dynamic Scene Reconstruction from Multiple View Video
This paper introduces a general approach to dynamic scene reconstruction from
multiple moving cameras without prior knowledge or limiting constraints on the
scene structure, appearance, or illumination. Existing techniques for dynamic
scene reconstruction from multiple wide-baseline camera views primarily focus
on accurate reconstruction in controlled environments, where the cameras are
fixed and calibrated and background is known. These approaches are not robust
for general dynamic scenes captured with sparse moving cameras. Previous
approaches for outdoor dynamic scene reconstruction assume prior knowledge of
the static background appearance and structure. The primary contributions of
this paper are twofold: an automatic method for initial coarse dynamic scene
segmentation and reconstruction without prior knowledge of background
appearance or structure; and a general robust approach for joint segmentation
refinement and dense reconstruction of dynamic scenes from multiple
wide-baseline static or moving cameras. Evaluation is performed on a variety of
indoor and outdoor scenes with cluttered backgrounds and multiple dynamic
non-rigid objects such as people. Comparison with state-of-the-art approaches
demonstrates improved accuracy in both multiple view segmentation and dense
reconstruction. The proposed approach also eliminates the requirement for prior
knowledge of scene structure and appearance
FTA in international finance : impacts of exchange rates on FTA utilization
This paper investigates how exchange rates affect the utilization of a free trade agreement (FTA) scheme in trading. Changes in exchange rates affect FTA utilization by two ways. The first way is by changing the excess profits gained by utilizing the FTA scheme, and the second way is by promoting the compliance of rules of origin. Our theoretical models predict that the depreciation of exporters\u27 currency against that of importers enhances the likelihood of FTA utilization through those two channels. Furthermore, our empirical analysis, which is based on rich tariff-line-level data on the utilization of FTA schemes in Korea\u27s imports from ASEAN countries, supports the theoretical prediction. We also show that the effects are smaller for more differentiated products
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