Siyun Liu (2133634), Yichen Liu (384171), Daniel J. Kersten (11740428) et al. · Figshare · 2021
<p>The top row used the lighting setting “spotlight 1” and viewpoint setting “center” to demonstrate the five target types: flat, big step-up big step-down, small step-up, and small step-down. The middle row used big step-down and center viewpoint to show the five lighting variations: overhead, far panel, near panel, spotlight 1, and spotlight 2. The bottom row used big step-down and spotlight 1 to show the five viewpoints: center, pivot left, pivot right, rotate down, and rotate up.</p>
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Allan C. Dobbins (366614), Jon K. Grossmann (366615) · Figshare · 2015
<p>The top two curves show that there is weak modulation of the probability of viewed-from-above with elevation in the array. In contrast, the lower two curves show a very strong modulation of perceived left/right orientation with left/right position – a cube in the leftmost column is much more likely to be seen as if tilted left/viewed from the right. (Mean ± s.e.m.) Least squares linear fits for the horizontal axis conditions: array (y = −1.97 θ+51.37, R<sup>2</sup> = 0.9672, p = 0.0025) and single cube condition (y = −1.20 θ+47.08, R<sup>2</sup> = 0.9317, p = 0.0077), where θ is in degrees and y is in percent. Fitting the mean of the paired differences for each observer in the horizontal axis conditions yielded: y = −0.57 θ+3.97, R<sup>2</sup> = 0.9678, p = 0.0025.</p>
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Claus Madsen · 1996
The paper presents an analysis of the stability of pose estimation. The investigated pose estimation technique is based on orientations of three edge segments and provides the rotation part of object pose. The specific emphasis of the analysis is on determining how the stability varies with view point relative to an object. The stability investigation propagates the uncertainty in edge segment orientations to the resulting effect on the pose parameters. It is shown that there is a very strong variation in noise sensitivity over the range of viewpoints and that exactly what viewpoints offer highest robustness towards noise can be determined in advance. Experiments on real images verify the theoretical results and show that, dependent on viewpoint, pose parameter variance varies from 0.05 to 20 (degrees squared).
Cited by 4
Huzio Nakano, Masafumi Hattori · Progress of Theoretical Physics · 1990
The significance of the so-called coarse graining of microscopic states of the macroscopic system in the irreversible process is discussed, by regarding a certain contraction of the detailed microscopic states as the coarse graining, where the contraction depends on the observation concerned. On the basis of the variation principle of irreversible processes, the present paper claims that the irreversibility immediately results from the contraction of total microscopic information about the system without any approximation. Practically, the conduction process is investigated in detail, where the component of the density operator even with respect to time reversal is completely eliminated by the contraction and the final variational expression for the conductivity reduces to a functional purely of the odd component.
Cited by 7Open access
R. B. Setlow · 1988
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Prof Yuan-fang Wang, Prof Steve Seitz, Rogério Schmidt Feris et al. · 2006
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Naoji Matsumoto, Shoma SUZUKI, Yurisa SUGIYAMA · Journal of Architecture and Planning (Transactions of AIJ) · 2015
Attractiveness of conspicuous sceneries within urban scenery as seen from high-rise buildings This paper aims to clarify, on the basis of varied viewpoint heights, the relationship between the characteristics of visual unity and the attractiveness of conspicuous sceneries within urban scenery. Authors analyzed sketches of urban sceneries drawn by subjects. The sketches showed conspicuous sceneries and their visual unity that subjects recognized while drawing these sceneries within each urban scenery. The results showed different trends related to the position of scenery components and visual unity characteristics, which are important for the feeling attractiveness in urban scenery.
Cited by 3Open access
Golzar Fatahi, Amin Talebi Bezmin Abadi · Research in Molecular Medicine · 2017
Helicobacter pylori (H. pylori) is the pivotal cause of chronic gastritis, peptic ulcer diseases (PUD) and gastric cancer. Morphologically, the bacterium is spiral, Gram-negative and microaerophilic which survives lifespan in the human stomach in case of weak antibiotic therapy. There is a major difference in the pattern of global prevalence of H. pylori infection based on different levels of urbanization, hygiene, sanitation, access to clean water and other socioeconomic factors. To date, many studies have attempted to find significant associations between specific gastroduodenal diseases and dupA-positive strains, but no conclusive conclusion has been declared. The main reason for these inconsistent findings is the various methodologies applied in experiments which in turn have resulted in inaccurate observation. Our analysis showed that the existence of various alleles located in the dupA cluster would be a novel explanation for different associations found between this bacterial gene and diseases. In detailed experiments examining our proposed alleles using a large number of patients can be useful to disclose a significant clinical association between H. pylori dupA-positive strains and duodenal ulcer.
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Cornelia Nopitsch-Mai, Susanne Winterscheid · 2015
This article gives an overview from a regulator’s perspective on the European variation procedure for type IA, type IB and type II variations, including line extensions. Grouping and worksharing processes which should facilitate variation procedures are briefly depicted. Some advice is given on how to avoid unnecessary variation procedures. Four case studies are outlined to illustrate best practice for variation procedures. The fideals with the update of an active substance master fi(ASMF), whereas the second case study illustrates grouping of consequential changes. The third case study reviews sections of Module 3 which should be updated concerning addition of a new supplier of a drug substance which is covered by a certifi cate of suitability (CEP). An example of an unforeseen variation is presented in the fourth case.
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Chikhman Vn, Shelepin IuE, Nicholas K. Foreman et al. · PubMed · 2009
Thresholds of recognition of 3-D objects when viewed as incomplete 2-D images were measured in psychophysical experiments varying perspective of 3-D objects during subject's learning and testing. The new method of measurement of recognition thresholds of the 2-D incomplete images of 3-D objects in Gollin-test has been created. The visual system appears to be capable of extrapolating results that were obtained at the first presentation of object, at one viewing angle to other, subsequent viewing angles. It appears that a template forms immediately after the first presentation of a 2-D projection of that object. This template has "invariance" properties since its use for object identification does not depend on the orientation at which the object is subsequently presented, at least up to an angle of 60 degrees. The algorithm for template formation of 3-D objects in the human visual system needs to be modeled, taking account of the invariance mechanism.
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A. S. Said, Jeevaragagam, Shuhaida Harun · Greater South Information System · 2023
It is anticipated that the variation in change within climate brought on by an increase in greenhouse gases would lead to greater temperatures as well as changing patterns of rain and snow, both of which will have a momentous impact on the lives of people. This research was conducted with the objectives of determining how residents of northern Nigeria's farming communities felt about the change within climate variation affects, how they reacted to those changes, and what impact those changes had on agricultural output in the region. For the purpose of the study, one hundred residents of Kaduna were selected at random for taking part. In order to learn how the unpredictability of change within climate and the strategies of adaptation impact agricultural production, a descriptive poll was conducted. The findings indicate that greater majority of individuals are aware of the gravity of change within climate and the fact that the majority of the impacts of change within climate on agricultural and livestock output are negative. The majority of individuals believe that the many strategies that have been developed to counter the undesirable effects of change within climate on agricultural output and livestock production are effective, as the findings of the survey demonstrated.
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A. S. Said, Jeevaragagam, Shuhaida Harun · Journal of Business Leadership and Management · 2023
It is anticipated that the variation in change within climate brought on by an increase in greenhouse gases would lead to greater temperatures as well as changing patterns of rain and snow, both of which will have a momentous impact on the lives of people. This research was conducted with the objectives of determining how residents of northern Nigeria's farming communities felt about the change within climate variation affects, how they reacted to those changes, and what impact those changes had on agricultural output in the region. For the purpose of the study, one hundred residents of Kaduna were selected at random for taking part. In order to learn how the unpredictability of change within climate and the strategies of adaptation impact agricultural production, a descriptive poll was conducted. The findings indicate that greater majority of individuals are aware of the gravity of change within climate and the fact that the majority of the impacts of change within climate on agricultural and livestock output are negative. The majority of individuals believe that the many strategies that have been developed to counter the undesirable effects of change within climate on agricultural output and livestock production are effective, as the findings of the survey demonstrated.
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John G. Harkins, Ellen Kittredge Scott, William J. Walsh · 1988
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Min Chen, Qing Zhu, Haiqing He et al. · SHILAP Revista de lepidopterología · 2019
A feature point matching method based on structureadaptive feature is proposed for urban area wide-baseline images. Firstly, interest points and straight lines are detected from images. Structure adaptive feature region and descriptor are constructed by exploring the geometric relationship between the interest point and the straight lines located in the local neighborhood of the point, and initial matching results are obtained by using bi-directional matching strategy. Secondly, the fundamental matrix is estimated from the initial matching results. An epipolar geometry constrained structure adaptive feature matching method is proposed to match those features have not been matched in the initial matching step. Finally, a matching expansion method is proposed based on the previous matching results to improve the matching performance.The proposed matching method can generate similar feature regions and descriptors for corresponding features under significant image viewpoint variation benefiting from the proposed structure adaptive feature region construction method. The experimental results demonstrate that the proposed method provides significant improvements in correct matches number and matching precision compared with other traditional matching methods for urban area wide-baseline images (e.g. unmanned aerial vehicle images and oblique images) with viewpoint change and occlusion.
Cited by 3Open access
Daniel G. Debouck · CGSPace A Repository of Agricultural Research Outputs (Consultative Group for International Agricultural Research) · 2017
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Melissa Koudelka, Peter N. Belhumeur · 2004
Real world surfaces such as tree bark, moss, banana skin, and drying mud have a visual appearance that is often complex due to their fine scale geometric and reflective structure. Changes in viewpoint or illumination, or the passage of time, can lead to further dramatic changes in self-shadowing, specularity and interreflection. Such details, although difficult to model abstractly, can provide a high degree of realism in a synthetic scene. I therefore propose an example-based approach to analyzing, synthesizing, and rendering textured surfaces based on densely sampled image datasets. These are acquired as they vary with illumination, viewpoint, and time. Three matrix decomposition techniques are applied to the bidirectional texture function (BTF) data for compression and comparison, and the idea of a universal basis capable of representing multiple textures is explored. The Time-Varying Texture Function (TTF), is then introduced to address progressive time variation in textured surfaces such as growing grass, decaying banana skins, and oxidizing copper. Algorithms for analyzing TTFs and synthesizing novel TTFs in 2D and on 3D surfaces are presented. Methods for controlling TTFs, allowing surface geometry, environmental factors, or user input to guide synthesis and time scale of change are demonstrated. Finally, the acquisition of physically-based control parameters for TTFs is explored.
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Akira Ota, Masaaki Uto · Preprints.org · 2024
Property valuation services using artificial intelligence (AI) have been developed, with more than 20 services available in Japan. However, since their algorithms and training data are not publicly available, the extent of differences in the AI property valuations among these services is not clear. This study focuses on the five services handling a lot of properties and uses a sample of 4,295 property valuations for 859 condominium units in six popular residential areas in Tokyo. (1) Multiple comparison tests of the AI property valuations among each service are conducted to confirm their statistical significance and to examine the degree of the difference and variation. (2) The business models of each service are compared to examine the factors contributing to these differences and variations. The results showed that there was a variation of approximately 0.15 in the coefficient of variation between the high and low valuation groups, and the service providers in the high valuation group guided the users to their sales, while those in the low valuation group focused on attracting users as their business models. The contribution of this study is to indicate the possibility that the business models may lead to the differences in the AI property valuations.
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Luzi Wang, Yunsheng Qian · Lecture notes in electrical engineering · 2023
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Michał Bogusiewicz, Katarzyna Rosińska-Bogusiewicz, Andrzej Drop et al. · International Urogynecology Journal · 2011
The IF-PS distance varies considerably in the general population of women.
Cited by 18Open access
Dilip Nathwani, Peter Davey · Infectious Diseases in Clinical Practice · 1995
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