English Journal

Ambient volume scattering.

Ament M, Sadlo F, Weiskopf D.Author information VISUS, University of Stuttgart.AbstractWe present ambient scattering as a preintegration method for scattering on mesoscopic scales in direct volume rendering. Far-range scattering effects usually provide negligible contributions to a given location due to the exponential attenuation with increasing distance. This motivates our approach to preintegrating multiple scattering within a finite spherical region around any given sample point. To this end, we solve the full light transport with a Monte-Carlo simulation within a set of spherical regions, where each region may have different material parameters regarding anisotropy and extinction. This precomputation is independent of the data set and the transfer function, and results in a small preintegration table. During rendering, the look-up table is accessed for each ray sample point with respect to the viewing direction, phase function, and material properties in the spherical neighborhood of the sample. Our rendering technique is efficient and versatile because it readily fits in existing ray marching algorithms and can be combined with local illumination and volumetric ambient occlusion. It provides interactive volumetric scattering and soft shadows, with interactive control of the transfer function, anisotropy parameter of the phase function, lighting conditions, and viewpoint. A GPU implementation demonstrates the benefits of ambient scattering for the visualization of different types of data sets, with respect to spatial perception, high-quality illumination, translucency, and rendering speed.
IEEE transactions on visualization and computer graphics.IEEE Trans Vis Comput Graph.2013 Dec;19(12):2936-45. doi: 10.1109/TVCG.2013.129.
We present ambient scattering as a preintegration method for scattering on mesoscopic scales in direct volume rendering. Far-range scattering effects usually provide negligible contributions to a given location due to the exponential attenuation with increasing distance. This motivates our approach
PMID 24051861

Visualizing fuzzy overlapping communities in networks.

Vehlow C, Reinhardt T, Weiskopf D.Author information VISUS, University of Stuttgart.AbstractAn important feature of networks for many application domains is their community structure. This is because objects within the same community usually have at least one property in common. The investigation of community structure can therefore support the understanding of object attributes from the network topology alone. In real-world systems, objects may belong to several communities at the same time, i.e., communities can overlap. Analyzing fuzzy community memberships is essential to understand to what extent objects contribute to different communities and whether some communities are highly interconnected. We developed a visualization approach that is based on node-link diagrams and supports the investigation of fuzzy communities in weighted undirected graphs at different levels of detail. Starting with the network of communities, the user can continuously drill down to the network of individual nodes and finally analyze the membership distribution of nodes of interest. Our approach uses layout strategies and further visual mappings to graphically encode the fuzzy community memberships. The usefulness of our approach is illustrated by two case studies analyzing networks of different domains: social networking and biological interactions. The case studies showed that our layout and visualization approach helps investigate fuzzy overlapping communities. Fuzzy vertices as well as the different communities to which they belong can be easily identified based on node color and position.
IEEE transactions on visualization and computer graphics.IEEE Trans Vis Comput Graph.2013 Dec;19(12):2486-95. doi: 10.1109/TVCG.2013.232.
An important feature of networks for many application domains is their community structure. This is because objects within the same community usually have at least one property in common. The investigation of community structure can therefore support the understanding of object attributes from the n
PMID 24051815

[Examination of visual performance by adaptive optics].

Weigel D, Jungnickel H, Babovsky H, Kiessling A, Kowarschik R.Author information Institut für Angewandte Optik, Abbe Center of Photonics, Zentrum für Medizinische Optik und Photonik, Friedrich-Schiller-Universität Jena.AbstractBACKGROUND: The dependence of visual quality on higher order aberrations (HOA) is highly important for refractive surgery (LASIK) as well as for the correction by vision aids. The use of the adaptive optics (AO) enables the measurement and manipulation of conventional lower order aberrations (defocus, astigmatism) and for HOAs as well. In this work, an Adaptive Optics Visual Simulator is presented that enables one to correct wave-front deformations up to the sixth order of Zernike polynomials, as well as to induce specific aberrations. The subjects observe a TFT monitor, so that a subjective rating of the visual impression is possible, as well as objective measurements.
Klinische Monatsblätter für Augenheilkunde.Klin Monbl Augenheilkd.2013 Dec;230(12):1199-206. doi: 10.1055/s-0033-1351070. Epub 2013 Dec 10.
BACKGROUND: The dependence of visual quality on higher order aberrations (HOA) is highly important for refractive surgery (LASIK) as well as for the correction by vision aids. The use of the adaptive optics (AO) enables the measurement and manipulation of conventional lower order aberrations (defocu
PMID 24327282

Japanese Journal

23.硝子体(しょうしたい)混濁に対応するステロイドのストキャステック投薬制御

森山峻,堀尾誠,笠松博史,森本滋郎,田淵敏明
電子情報通信学会技術研究報告. MBE, MEとバイオサイバネティックス 103(184), 25-30, 2003-07-06
… The paper describes the stochastic medication control for the decision making of the steroid and the eye sights (visus. …
NAID 110003286532

縦断的にみた視力低下の現状とその要因

島田彰夫
民族衛生 56(5), 1990
… VA of decimal notation have been changed to visus logarithmus and then the mean values were caliculated. …
NAID 130002021454

Detection of hepatitis B virus DNA in paraffin-embedded liver tissues of chronic hepatitis B and non-A, non-B using polymerase chain reaction.

進藤道子,奥野忠雄,新井賢,松本昌之,武田誠,加嶋敬,島田守,宗川吉汪
肝臓 31(8), 1990
… The polymerase chain reaction (PCR) was used to detect hepatitis B visus (HBV) DNA from the paraffin-embedded liver tissue of chronic hepatitis B and non-A, non-B so as to determine whether HBVDNA coexists in chronic hepatitis non-A, non-B liver. …
NAID 130000878341

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