scholarly journals Comparison of Acceleration Data Structures for High Quality Fast Reflections of Static and Deformable Models in Walkthrough Animations

2016 ◽  
Vol 7 (1) ◽  
pp. 1
Author(s):  
Daniel V Macedo ◽  
Maria Andréia F Rodrigues
Keyword(s):  
Ray Tracing ◽  
Data Structures ◽  
Hybrid Algorithm ◽  
Deformable Models ◽  
Extended Version ◽  
High Quality ◽  
Acceleration Data ◽  
Interactive Frame ◽  
Acceleration Structures ◽  
Realistic Images

In order to render realistic images, the reflectance of surfaces must be simulated accurately. Generally, the ray tracing rendering technique is used to make a material reflect its surroundings, since it represents with great fidelity the behavior of light. However, ray tracing is still a very costly algorithm, so far mostly indicated in offline rendering scenarios. This situation is even more challenging for scenes containing 3D deformable meshes, since their geometry and, thus, the acceleration structures used, need to be updated in each frame of the animation. In this paper, we present an extended version of our hybrid algorithm that combines rasterization and a pure ray tracing through the NVIDIA OptiX to render high quality fast reflections, including scenes with deformable models. Additionally, we analyze and compare the performances of different NVIDIA OptiX acceleration data structures for generating reflections of static and deformable models in walkthrough animations. The results show that NVIDIA OptiX acceleration structures reach high frames per second for static objects. However, there is a performance decay in terms of frames per second when dealing with deformable models, since it becomes necessary to update the acceleration structures to cope with changing geometry, but even under these restrictions, we were able to achieve interactive frame rates.

Comparison of Acceleration Data Structures for Electromagnetic Ray-Tracing Purposes on GPUs [EM Programmer's Notebook]

2015 ◽  
Vol 57 (5) ◽  
pp. 159-176 ◽  
Author(s):  
Alfonso Breglia ◽  
Amedeo Capozzoli ◽  
Claudio Curcio ◽  
Angelo Liseno
Keyword(s):  
Ray Tracing ◽  
Data Structures ◽  
Acceleration Data

scholarly journals Table of Contents and Foreword

2009 ◽  
Vol 4 (2) ◽  
pp. 46-50
Author(s):  
João Antonio Martino ◽  
Marcelo Lubaszewski
Keyword(s):  
Integrated Circuits ◽  
Extended Version ◽  
High Quality ◽  
Scientific Level ◽  
Microelectronics Technology ◽  
Soi Technology

This issue of Journal of Integrated Circuits and Systems (JICS) includes papers on process, materials, devices, and modeling. These papers have been selected from the presentations given at SBMicro2008 (23rd Symposium on Microelectronics Technology and Devices), which has been held in Gramado, Brazil in 2008. Among the contributions presented at SBMicro2008 conference, only a few best rated by the reviewers were selected by the JICS Editorial Board and have been invited to submit an extended version. These papers have been submitted to usual reviewing process with the help of external experts. An invited paper from Dr. Carlos Mazure on SOI technology and its applications is included in this issue and also spontaneous submissions have been considered. We would like to thank the authors for their effort in preparing these high quality papers, as well as the reviewers for their help on paper selection, which guarantees the scientific level of this issue.We sincerely hope that JICS readers will enjoy these contributions.João Antonio Martino - JICS Editor-in-chiefMarcelo Lubaszewski - JICS Co-Editor

Rendering and Comparing Research of 3D Julia Sets Based on CPU/GPU

2012 ◽  
Vol 542-543 ◽  
pp. 1434-1437
Author(s):  
Xiao Ping Xiao ◽  
Zi Sheng Li ◽  
Wei Gong
Keyword(s):  
Ray Tracing ◽  
Volume Rendering ◽  
Julia Sets ◽  
Time Algorithm ◽  
High Quality

Aiming at the problem that rendering 3D Julia sets on CPU is slowly, a method of rendering 3D Julia sets on GPU is presented in this paper. After introducing the advantages of GPU and the operations of quaternion, the generating process of 3D Julia sets is discussed in detail. Ray tracing volume rendering algorithm is applied to obtain high quality 3D Julia sets, and escaping time algorithm is used to generate the discreet data of Julia sets, of which normal is estimated according to the original of ray and accelerated by using unbounding sphere algorithm, and the graphics examples are given to illustrate this algorithm. Finally, the factors of affecting rendering speed and refined effect are summarized. The results show that the speed of 3D Julia sets rendering on GPU is much faster than CPU, and the interactivity of rendering process is also enhanced.

scholarly journals Incremental Density-Based Link Clustering Algorithm for Community Detection in Dynamic Networks

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Fanrong Meng ◽  
Feng Zhang ◽  
Mu Zhu ◽  
Yan Xing ◽  
Zhixiao Wang ◽  
...  
Keyword(s):  
Community Structure ◽  
Complex Networks ◽  
Community Detection ◽  
Network Topology ◽  
Clustering Algorithm ◽  
Dynamic Networks ◽  
Experimental Results ◽  
Extended Version ◽  
High Quality ◽  
Detection Algorithms

Community detection in complex networks has become a research hotspot in recent years. However, most of the existing community detection algorithms are designed for the static networks; namely, the connections between the nodes are invariable. In this paper, we propose an incremental density-based link clustering algorithm for community detection in dynamic networks, iDBLINK. This algorithm is an extended version of DBLINK which is proposed in our previous work. It can update the local link community structure in the current moment through the change of similarity between the edges at the adjacent moments, which includes the creation, growth, merging, deletion, contraction, and division of link communities. Extensive experimental results demonstrate that iDBLINK not only has a great time efficiency, but also maintains a high quality community detection performance when the network topology is changing.

scholarly journals Table of Contents and Foreword

2013 ◽  
Vol 8 (2) ◽  
pp. 64-70
Author(s):  
Marcelo Antonio Pavanello ◽  
Fernando Gehm Moraes
Keyword(s):  
Financial Support ◽  
Extended Version ◽  
Valuable Contribution ◽  
High Quality ◽  
Scientific Level ◽  
Microelectronics Technology

In this issue of JICS some of the papers have been selected from the presented at SBMicro2012 (27th Symposium on Microelectronics Technology and Devices), which has been held in Brasília, Brazil, in 2012. Among the contributions presented at the s ymposium, only a few best rated were selected by the JICS Editorial Board and have been invited to submit an extended version to the Journal. These extended papers have passed through the usual reviewing process before acceptance. In addition to the best papers presented at the conference, spontaneous submissions passed through the usual reviewing process and have been accepted as regular papers. We would like to thank the authors for their effort in preparing these high quality papers, as well as the reviewers for their valuable contribution on paper evaluation and selection, which guarantees the scientific level of this issue. We sincerely hope that JICS readers will enjoy these contributions. We also would like to thank the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) for the financial support for this JICS Issue.Marcelo Antonio Pavanello - JICS Editor-in-chiefFernando Gehm Moraes - JICS Co-Editor

DESIGN AND PRODUCT DESIGN IN CAD/CAM/CAE NX SYSTEM MANAGED BY TEAMCENTER PLM SYSTEM

2020 ◽  
Vol 1 (2) ◽  
pp. 45-52
Author(s):  
S. Anciferov ◽  
A. Karachevceva ◽  
L. Sivachenko
Keyword(s):  
Ray Tracing ◽  
Construction Industry ◽  
High Quality ◽  
System A ◽  
High Quality Image ◽  
Electronic Model ◽  
Quality Image ◽  
Cad Cam ◽  
Roller Support ◽  
Plm System

The article discusses a system widely implemented in the designing of equipment for the NX construction industry. Along with this system, a modern automation tool was used. The most common and most used products are Siemens products: PLM-system "Teamcenter". The functionality of this configuration is huge, it includes such applications a "Manager of Structure", "Classifier", "Advanced Studio", "Ray Tracing Studio", etc. For example, it is possible to create a single product structure with various configurations, machine components and assemblies, using the "Structure Manager". This structure allows to simplify the introduction of changes and the development of a digital electronic model. For the final visualization and rendering, the NX system provides a certain set of tools, which includes "Extended Studio" and "Ray Tracing Studio". "Advanced Studio" is an application allowing to get high-quality image, including the effects of materials, textures, lighting, shadows and reflections for the product in the CAD/CAM/CAE NX system. "Ray Tracing Studio" allows to get the rendering of the future product. In the Ray Tracing Studio editor, it is possible to configure such parameters as dynamic tracing setting, real-time ray tracing setting, display static high-quality tracing setting, and general display settings. Creation of a product in this system can be considered by the example of a digital electronic model of a roller support.

Explaining World Wine Exports in the First Wave of Globalization, 1848–1938

2020 ◽  
Vol 15 (3) ◽  
pp. 263-283 ◽  
Author(s):  
María-Isabel Ayuda ◽  
Hugo Ferrer-Pérez ◽  
Vicente Pinilla
Keyword(s):  
Transaction Costs ◽  
Gravity Model ◽  
Interwar Period ◽  
Alcoholic Beverage ◽  
Home Bias ◽  
Extended Version ◽  
Tariff Protection ◽  
High Quality ◽  
Small Minority ◽  
Jel Classifications

AbstractThe objective of this article is to analyze the determinants of world wine exports in the first globalization, taking into account the principal exporting countries and using an extended version of the gravity model. The article distinguishes between ordinary- and high-quality wines. Our econometric results show that wine exports were not affected by the increase in the size of the markets of consuming countries, since in most of them wine was an alcoholic beverage consumed by a very small minority of the population. The harvests of the producing countries, particularly in preceding years, significantly and positively affected their exports. Conversely, the harvests of importers hurt exports as there was a home bias in consumption due to cultural, price, or tariff protection reasons. In the interwar period, the wine trade was severely affected by a series of shocks such as WWI, the Soviet revolution, the Prohibition, and the 1930s depression. As was the case with trade as a whole, the fall in transaction costs, favored exports, at least those of lower-priced and lower-quality wine. However, the liberalization of trade had a lesser impact on wine than on other products. (JEL Classifications: F14, N50, Q13, Q17)

scholarly journals Opticks : GPU Optical Photon Simulation for Particle Physics using NVIDIA® OptiXTM

2019 ◽  
Vol 214 ◽  
pp. 02027
Author(s):  
Simon Blyth
Keyword(s):  
Ray Tracing ◽  
Particle Physics ◽  
Distribution Functions ◽  
Cumulative Distribution ◽  
Multiple Gpus ◽  
Performance Improvements ◽  
Optical Photon ◽  
Automated Translation ◽  
Number Sequences ◽  
Acceleration Structures

Opticks is an open source project that integrates the NVIDIA OptiX GPU ray tracing engine with Geant4 toolkit based simulations. Massive parallelism brings drastic performance improvements with optical photon simulation speedup expected to exceed 1000 times Geant4 with workstation GPUs. Optical physics processes of scattering, absorption, scintillator reemission and boundary processes are implemented as CUDA OptiX programs based on the Geant4 implementations. Wavelength-dependent material and surface properties as well as inverse cumulative distribution functions for reemission are interleaved into GPU textures providing fast interpolated property lookup or wavelength generation. OptiX handles the creation and application of a choice of acceleration structures such as boundary volume hierarchies and the transparent use of multiple GPUs. A major recent advance is the implementation of GPU ray tracing of complex constructive solid geometry shapes, enabling automated translation of Geant4 geometries to the GPU without approximation. Using common initial photons and random number sequences allows the Opticks and Geant4 simulations to be run point-by-point aligned. Aligned running has reached near perfect equivalence with test geometries.

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