20 papers · ranked by Valyu relevance
Flávio Heleno Graciano, Diogo Ricardo da Costa, Edson D. Leonel, Juliano A. de Oliveira + 4 more
'Juliano A. de Oliveira' 'José A. Tenreiro Machado' 'Carla M.A. Pinto' 'Julio Rebelo' 'Helena Reis'] We study the dynamics of classical particles confined in a time-dependent potential well. The dynamics of each particle is described by a two-dimensional nonlinear discrete mapping for the variables energy $e_{n}$ and…
Alexander Nahmad-Rohen, W. Langbein
Reflectometry is a technique that uses the light reflected by a sample to determine properties of the sample. Interferometric reflectometry uses interference between two beams, one of which is incident on —and reflected back by— a sample and one of which is not, to obtain the complex electric field rather than merely…
Thach G. Nguyen, K. Yasumura, Tran, Duy V. + 1 more
Thach A. Nguyen,1, ∗ Kaitlyn S. Yasumura,2, ∗ Duy V. Tran, 3 and Trung V. Phan4, † 1 University of South Florida, Tampa, FL 33620, USA. 2 Scripps College, Claremont, CA 91711, USA 3 Department of Mechanical Engineering, VNUHCM University of Technology, Binh Thanh, Ho Chi Minh 700000, Vietnam. 4 Department of Natural…
Mariana Borcha, Igor Fodchuk, Mykola Solodkyi, Marina Baidakova
Opportunities of multi-beam X-ray diffraction are demonstrated for determination of lattice strains in heterostructures and multi-layered systems.
Connor Henley, Siddharth Somasundaram, Joseph L. Hollmann, Ramesh Raskar
'Ramesh Raskar'] Abstract. We propose methods that use specular, multibounce lidar returns to detect and map specular surfaces that might be invisible to conventional lidar systems that rely on direct, single-scatter returns. We derive expressions that relate the time- and angle-of-arrival of these multibounce returns…
James T. Todd
This paper provides an overview of the many different ways that light interacts with surfaces in the natural environment to provide useful information for visual perception. It begins with a discussion of how the concept of light has evolved over the course of human history. It then considers a wide variety of optical…
Yicong Wu, Abhishek Kumar, Corey Smith, Evan Ardiel + 10 more
Light-sheet fluorescence microscopy (LSFM) enables high-speed, high-resolution, gentle imaging of live biological specimens over extended periods. Here we describe a technique that improves the spatiotemporal resolution and collection efficiency of LSFM without modifying the underlying microscope. By imaging samples on…
Leif Van Holland, Michael Weinmann, Jan U. Müller, Patrick Stotko + 1 more
Mirror Scene Reconstruction with 3D Surface Primitives Authors: ['Leif Van Holland' 'Michael Weinmann' 'Jan U. Müller' 'Patrick Stotko' 'Reinhard Klein'] While neural radiance fields (NeRF) led to a breakthrough in photorealistic novel view synthesis, handling mirroring surfaces still denotes a particular challenge as…
James T. Todd
In 1966, James Gibson first presented his theory of the ambient optic array, and he proposed a new field of ecological optics that he hoped would advance our knowledge on this topic. This study will consider how his ideas have largely come to fruition over the past 50 years. It reviews the research on the visual…
L. L. Sanchez-Soto, J. J. Monzon, G. Leuchs
We address the response of a Fabry-Perot interferometer to a monochromatic point source. We calculate the anticaustics (that is, the virtual wavefronts of null path difference) resulting from the successive internal reflections occurring in the system. They turn to be a family of ellipsoids (or hyperboloids) of…
Junyi Zeng, Chong Bao, Rui Chen, Zilong Dong + 3 more
The goal of neural rendering is to synthesize photorealistic images or videos by computing the light transport in a 3D scene. Lots of works have been proposed to push the envelope of rendering quality in this field. One of the most notable approaches is NeRF , which models the radiance field of a scene using the MLP.…
Sophie J. Nightingale, Kimberley A. Wade, Hany Farid, Derrick G. Watson
'Derrick G. Watson'] The increasing sophistication of photo-editing software means that even amateurs can create compelling doctored images. Yet recent research suggests that people’s ability to detect image manipulations is limited. Given the prevalence of manipulated images in the media, on social networking sites…
David D. Au, Joshua B. Melander, Javier C. Weddington, Youssef Faragalla + 4 more
Mice make substantial eye movements during head-fixed visual stimulation, and uncorrected gaze shifts corrupt receptive field measurements and confound stimulus-response relationships. Corneal-reflection video oculography in rodents has provided the methodological foundation for calibrated angular gaze tracking since…
Benjamin A. Palmer, Anna Hirsch, Vlad Brumfeld, Eliahu D. Aflalo + 8 more
The eyes of some aquatic animals form images through reflective optics. Shrimp, lobsters, crayfish and prawns possess reflecting superposition compound eyes, composed of thousands of square-faceted eye-units (ommatidia). Mirrors in the upper part of the eye (the distal mirror) reflect light collected from many…
Authors not listed
Layered crystal structures are commonly found across organic and inorganic material systems. When in-plane atomic arrangement remains (nearly) identical, a stacking variation of these layers may result in twinning, planar disorder, or polytypes, a form of polymorphism derived from altering stacking sequences. In this…
Ruei-Jr Wu, Ashley Clark, Michele Cox, Janis Intoy + 3 more
Reliably measuring eye movements and determining where the observer looks are fundamental needs in vision science. A classical approach to achieve high-resolution oculomotor measurements is the so-called Dual-Purkinje-Image (DPI) method, a technique that relies on the relative motion of the reflections generated by two…
Takeaki Shimokawa, Akiko Nishio, Masa-aki Sato, Mitsuo Kawato + 1 more
In natural conditions the human visual system can estimate the 3D shape of specular objects even from a single image. Although previous studies suggested that the orientation field plays a key role for 3D shape perception from specular reflections, its computational plausibility and possible mechanisms have not been…
Richard J. Gildea, James Beilsten-Edmands, Danny Axford, Sam Horrell + 9 more
In macromolecular crystallography radiation damage limits the amount of data that can be collected from a single crystal. It is often necessary to merge data sets from multiple crystals, for example small-wedge data collections on micro-crystals, in situ room-temperature data collections, and collection from membrane…
Niko Vlahakis, Arden Clauss, Jose Rodriguez
High-energy electrons induce sample damage and motion at the nanoscale to fundamentally limit determination of molecular structures by electron diffraction. Using fast event-based electron counting (EBEC) detectors, we characterize electron beam-induced crystal lattice reorientations (BIR) that appear to broadly affect…
Theresa Ramelot, Roberto Tejero, Gaetano Montelione
Biomolecules exhibit dynamic behavior that single-state models of their structures cannot fully capture. We review some recent advances for investigating multiple conformations of biomolecules, including experimental methods, molecular dynamics simulations, and machine learning. We also address the challenges…