Chaotic Crystallography: How the physics of information reveals structural order in materials

We review recent progress in applying information- and computation-theoretic measures to describe material structure that transcends previous methods based on exact geometric symmetries. We discuss the necessary theoretical background for this new toolset and show how the new techniques detect and describe novel material properties. We discuss how the approach relates to well known crystallographic practice and examine how it provides novel interpretations of familiar structures. Throughout, we concentrate on disordered materials that, while important, have received less attention both theoretically and experimentally than those with either periodic or aperiodic order.Comment: 9 pages, two figures, 1 table; http://csc.ucdavis.edu/~cmg/compmech/pubs/ChemOpinion.ht

Impressionistic techniques applied in sound art & design

Sound art and design collectively refer to the process of specifying, acquiring, manipulating or generating sonic elements to evoke emotion and environment. Sound is used to convey the intentions, emotions, spirit or aura of a story, performance, or sonic installation. Sound connects unique aural environments, creating an immersive experience via mood and atmosphere. Impressionistic techniques such as Impasto, Pointillism, Sgraffito, Stippling introduced by 19th-century painters captured the essence of their subject in more vivid compositions, exuding authentic movements and atmosphere. This thesis applied impressionistic techniques using sound art and design to project specific mood and atmosphere responses among listeners. Four unique sound textures, each representing a technique from Impressionism, and a fifth composite sound texture were created for this project. All five sound textures were validated as representative of their respective Impressionistic technique. Only sonic Pointillism matched its emotive intent. This outcome supports the research question that sound art and design can be used to direct listeners’ mood and atmosphere responses. Partnering Impressionistic principles with sound art and design offers a deeper palette to sonically deliver more robust, holistic soundscapes for amplifying an audience’s listening experience. This project provides a foundation for future explorations and studies in applying cross-disciplinary artistic techniques with sound art and design or other artistic endeavors

Molecular dynamics study of the binary Cu_(46)Zr_(54) metallic glass motivated by experiments: Glass formation and atomic-level structure

We have identified a binary bulk metallic glass forming alloy Cu_(46_Zr_(54) by analyzing the structure and thermal behaviors of copper mold cast samples using x-ray diffraction, transmission electron microscopy, and differential scanning calorimeter. Motivated by these experimental results, we fitted the effective Rosato-Guillope-Legrand-type force field parameters for the binary Cu-Zr alloy system and the atomistic description of glass formation and structure analysis of the Cu_(46)Zr_(54) alloy based on molecular dynamics simulation will be also presented