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"Computer graphics -- Design"
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Pixel art for game developers
\"Uncover the secrets to creating stunning graphics with Pixel Art for Game Developers. ... The book provides an introduction to Pixel Art, its utility, foundational elements, and concepts such as light and shadow. It offers tutorials on creating animations and serves as a functional guide for the most common methodology in 2D game development.\"--Back cover.
Book
Visual Perception from a Computer Graphics Perspective
Suitable for readers studying or working in the fields of computer graphics and visualization, cognitive science, and visual neuroscience, this book provides an introduction to human visual perception. It focuses on how computer graphics images are generated, rather than solely on the visual system's organization, so the text provides a more direct tie between image generation and the resulting perceptual phenomena. It covers topics such as illumination, action, and perception of factors including material properties, pictorial space, image statistics, and spatial cognition.
eBook
Multi-material topology optimization using Wachspress interpolations for designing a 3-phase electrical machine stator
This work uses multi-material topology optimization (MMTO) to maximize the average torque of a 3-phase permanent magnet synchronous machine (PMSM). Eight materials are considered in the stator: air, soft magnetic steel, three electric phases, and their three returns. To address the challenge of designing a 3-phase PMSM stator, a generalized density-based framework is used. The proposed methodology places the prescribed material candidates on the vertices of a convex polytope, interpolates material properties using Wachspress shape functions, and defines Cartesian coordinates inside polytopes as design variables. A rational function is used as penalization to ensure convergence towards meaningful structures, without the use of a filtering process. The influences of different polytopes and penalization parameters are investigated. The results indicate that a hexagonal-based diamond polytope is a better choice than the classical orthogonal domains for this MMTO problem. In addition, the proposed methodology yields high-performance designs for 3-phase PMSM stators by implementing a continuation method on the electric load angle.
Journal Article
Computer-aided engineering design with SolidWorks
Designed for students taking the SolidWorks course in Colleges and Universities and for engineering designers involved or interested in using SolidWorks for real-life applications in manufacturing processes, mechanical systems and engineering analysis.
Book
Geometric design of friction ring dampers in blisks using nonlinear modal analysis and Kriging surrogate model
Integrally bladed disks (blisk) have been widely used in the turbo-machinery industry due to its high aerodynamic performance and structural efficiency. A friction ring damper (FRD) is usually integrated in the system to improve its low damping. However, the design of the geometry of this FRD become complex and computationally expensive due to the strong nonlinearities from friction interfaces. In this work, we propose an efficient modelling strategy based on advanced nonlinear modal analysis and Kriging surrogate models to design and optimize the geometry of a 3D FRD attached to a high fidelity full-scale blisk. The 3D ring damper is parametrised with a few key geometrical parameters. The impact of each geometric parameter and their sensitivities to nonlinear dynamic response can be efficiently assessed using Kriging meta-modelling based on a few damped nonlinear normal modes. Results demonstrate that the damping performances of ring dampers can be substantially optimized through the proposed modelling strategy whilst key insights for the design of the rings are given. It is also demonstrated that the distribution of the contact normal load on the contact interfaces has a strong influence on the damping performances and can be effectively tuned via the upper surface geometry of the ring dampers.
Journal Article
Translating community-wide spectral library into actionable chemical knowledge: a proof of concept with monoterpene indole alkaloids
With over 3000 representatives, the monoterpene indole alkaloids (MIAs) class is among the most diverse families of plant natural products. The MS/MS spectral space exploration of these complex compounds using chemoinformatic and computational mass spectrometry tools offers a valuable opportunity to extract and share chemical insights from this emblematic family of natural products (NPs). In this work, we first present a substantially updated version of the MIADB, a database now containing 422 MS/MS spectra of MIAs that has been uploaded to the GNPS library versus 172 initial entries. We then introduce an innovative workflow that leverages hundreds of fragmentation spectra to support the FAIRification, extraction and dissemination of chemical knowledge. This workflow aims at the extraction of spectral patterns matching finely defined MIA skeletons. These extracted signatures can then be queried against complex biological extract datasets using MassQL. By applying this strategy to an LC-MS/MS dataset of 75 plant extracts, our results demonstrated the efficiency of this approach in identifying the diversity of MIA skeletons present in the analyzed samples. Additionally, our work enabled the digitization of structural data for diverse MIA skeletons by converting them into machine-readable formats and thereby enhancing their dissemination for the scientific community.
Scientific contribution
A comprehensive investigation of the monoterpene indole alkaloid chemical space, aiming to highlight skeleton-dependent fragmentation similarity trends and to generate valuable spectrometric signatures that could be used as queries.
Graphical Abstract
Journal Article
Molmil: a molecular viewer for the PDB and beyond
We have developed a new platform-independent web-based molecular viewer using JavaScript and WebGL. The molecular viewer, Molmil, has been integrated into several services offered by Protein Data Bank Japan and can be easily extended with new functionality by third party developers. Furthermore, the viewer can be used to load files in various formats from the user’s local hard drive without uploading the data to a server. Molmil is available for all platforms supporting WebGL (e.g. Windows, Linux, iOS, Android) from
http://gjbekker.github.io/molmil/
. The source code is available at
http://github.com/gjbekker/molmil
under the LGPLv3 licence.
Journal Article