Graphic study and geovisualization of the old windmills of La Mancha (Spain)

In Spain, one can find geographical diversity and unique sites of great significance and cultural heritage. Many of the nation’s treasured places, however, have deteriorated or have even disappeared. What is left, then, should be studied and documented both graphically and infographically. It is important to preserve and document Spain’s unique locations, especially those related to vernacular heritage, to transhumance and visual impact assessment in many national infrastructures projects. Windmills are important examples of agro-industrial heritage and are sometimes found in the beds of streams and rivers but can also be found high in the hills. Their presence is constant throughout the Iberian Peninsula. These mills are no longer in use due to technological advances and the emergence of new grinding systems. The aim of this study was to present a specific methodology for the documentation of windmills, to create a graphical representation using computer graphics, as well as to disseminate knowledge of this agro-industrial heritage. This research has integrated graphic materials, including freehand sketches, photographs, digital orthophotos, computer graphics and multimedia in the creation of a specific methodology based on cutting-edge technology such as a digital photogrammetric workstation (DPW), global navigation satellite systems (GNSS), computer-aided design (CAD) and computer animation

GPU-based high performance Monte Carlo simulation in neutron transport

Graphics Processing Units (GPU) are high performance co-processors intended, originally, to improve the use and quality of computer graphics applications. Since researchers and practitioners realized the potential of using GPU for general purpose, their application has been extended to other elds out of computer graphics scope. The main objective of this work is to evaluate the impact of using GPU in neutron transport simulation by Monte Carlo method. To accomplish that, GPU- and CPU-based (single and multicore) approaches were developed and applied to a simple, but time-consuming problem. Comparisons demonstrated that the GPU-based approach is about 15 times faster than a parallel 8-core CPU-based approach also developed in this work

Recent advances in transient imaging: A computer graphics and vision perspective

Transient imaging has recently made a huge impact in the computer graphics and computer vision fields. By capturing, reconstructing, or simulating light transport at extreme temporal resolutions, researchers have proposed novel techniques to show movies of light in motion, see around corners, detect objects in highly-scattering media, or infer material properties from a distance, to name a few. The key idea is to leverage the wealth of information in the temporal domain at the pico or nanosecond resolution, information usually lost during the capture-time temporal integration. This paper presents recent advances in this field of transient imaging from a graphics and vision perspective, including capture techniques, analysis, applications and simulation

Recent advances in transient imaging: A computer graphics and vision perspective

Transient imaging has recently made a huge impact in the computer graphics and computer vision fields. By capturing, reconstructing, or simulating light transport at extreme temporal resolutions, researchers have proposed novel techniques to show movies of light in motion, see around corners, detect objects in highly-scattering media, or infer material properties from a distance, to name a few. The key idea is to leverage the wealth of information in the temporal domain at the pico or nanosecond resolution, information usually lost during the capture-time temporal integration. This paper presents recent advances in this field of transient imaging from a graphics and vision perspective, including capture techniques, analysis, applications and simulation

Technological innovation at PC sector during Covid-crisis

PURPOSE: The article's primary goal is to assess the current impact of the coronavirus pandemic on the innovative activity of computer hardware manufacturers. It is imperative to assess whether the impact of a pandemic is negative.DESIGN/APPROACH/METHODOLOGY: For the set goals, the authors analyzed the literature on innovation. The analysis of the case study referred to the segment of graphics card manufacturers. Graphics cards were assessed based on selected criteria. These criteria are the technological process of producing graphics processors (photolithography), and the second element in the evaluation of graphics cards were the results of selected card models in a representative program for computer graphics performance tests.FINDINGS: Thanks to this approach, it was possible to identify trends in graphics card performance in the pre-pandemic and pandemic period. The increase in graphics card performance is the result of the implementation of technological innovations. So far, the coronavirus pandemic has not significantly affected the development of the graphics card segment.PRACTICAL IMPLICATIONS: The presented approach and results of analyses may constitute the basis for creating an advanced methodology for determining trends in the development of graphics processor performance.ORIGINALITY/VALUE: Research results confirmed the adopted assumptions that so far, the pandemic has not a negative impact on innovation in the computer hardware industry.peer-reviewe

THE IMPACT OF GRAPHICAL DISPLAYS ON PERSUASION: AN EMPIRICAL STUDY

Computer generated presentation graphics are increasingly becoming a tool to aid management in communicating information and to cause an audience to accept a point of view or take action. Unfortunately, technological capability significantly exceeds current levels of user understanding and effective application. The research reported here experimentally examines the persuasive impact of characteristics of computer-generated presentation graphics. The underlying model of persuasion is drawn from the communications literature. The study compares use of color versus black and white, and text versus image enhancement. Treatments were presented in association with a videotaped presentation intended to persuade subjects to invest time and money in a set of time management seminars. Pre-measure, post-measure, and post-measure followup questionnaires tracked changes in subject commitment. Subject perceptions of the presenter were also recorded. Overall, presentations supported with overhead transparencies were 46% more persuasive than unaided presentations. Visual aids had a major positive impact on audience perceptions of a presenter. The overall persuasion process model was only partially confirmed

Delaunay Hodge Star

We define signed dual volumes at all dimensions for circumcentric dual meshes. We show that for pairwise Delaunay triangulations with mild boundary assumptions these signed dual volumes are positive. This allows the use of such Delaunay meshes for Discrete Exterior Calculus (DEC) because the discrete Hodge star operator can now be correctly defined for such meshes. This operator is crucial for DEC and is a diagonal matrix with the ratio of primal and dual volumes along the diagonal. A correct definition requires that all entries be positive. DEC is a framework for numerically solving differential equations on meshes and for geometry processing tasks and has had considerable impact in computer graphics and scientific computing. Our result allows the use of DEC with a much larger class of meshes than was previously considered possible.Comment: Corrected error in Figure 1 (columns 3 and 4) and Figure 6 and a formula error in Section 2. All mathematical statements (theorems and lemmas) are unchanged. The previous arXiv version v3 (minus the Appendix) appeared in the journal Computer-Aided Desig