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27 results for “RTI”
RTI Experiment Simulation assuming Convective and Diffusive Interstitial Transport in the Brain: Concentration over time (and space)
<p>Simulation of interstitial transport in the brain assuming convective and diffusive transport with perivascular efflux routes. The movie shows the transient concentration of TMA ions in a real-time iontophoresis (RTI) experiment, where a small molecular probe is applied to brain tissue at a known rate and its concentration measured over time a a point 100-200um away, here 150 um. RTI experiments are used to characterize the properties of interstitial tissue to determine its void volume and tortuosity, 0.18 and 1.85 for the condition shown here. In this simulation, a model of combined diffusion and convection (superficial velocity=50 um/min) is applied to fit experimental data and range. (Convection assumes Darcy's Law with a hydraulic conductivity of 2x10<sup>-6</sup> cm<sup>2</sup> mmHg s<sup>-1</sup> and pressure difference of 2.15 mmHg). The model domain is a cube 750 um on a side with 8 penetrating arterioles and 8 penetrating venules. The first and third columns from the left are venules and the second and fourth are arterioles, with convective flow from arteriole to venule. As transport of molecules in the perivascular space is known to be faster than in the interstitium, the concentration is assumed to be c=0 at the vascular walls. The solute (TMA) must pass through a perivascular wall with lower diffusivity than the interstitium to leave the domain through a vascular wall (D<sub>wall</sub>=5%D<sub>interstitium</sub>). Although it is difficult to see in the movie, both the presence of convection and the perivascular efflux routes cause range(variability) in the measured concentration curves for different source and detection point combinations that is consistent with experimental data--see additional posted data. Computations performed using FEniCS, movie made using Paraview. </p>
Reference Reflectance Transformation Imaging acquisitions for RTI stitching and acquisition optimization
<p>This dataset contains 1. RTI acquisitions a canvas painting and a metal print plate in parts, for development of RTI-stitching methods. 2. Dense RTI acquisitions of brushed metal and ruse coarse metal surfaces for development of methods for determining ideal light positions in a RTI acquisitions. </p>
RTI simulated imagery - Coin-like object with and without surface markings
<p>A set of simulated reflectance transformation imaging (RTI) acquisitions using the 3D model of a coin-like object. One set is simulated with the base model and the other is with some markings created on the surface. The images were simulated using Blender.</p> <p>Each acquisitions contained the simulated RGB images as well as depth maps and normal maps computed by Blender using the 3D model. Also included are the .blend files used for the simulations which include the 3D models. There is also a .lp file which describes the light positions used.</p>
RTI simulated imagery - Parade Shield of King Erik XIV of Sweden
<p>A set of simulated reflectance transformation imaging (RTI) acquisitions using the 3D model of the parade shield of King Erik XIV of Sweden, hosted on Sketchfab by "The Royal Armoury (Livrustkammeren)" (<a href="https://skfb.ly/6Rp9Y">Link</a>) . One set is simulated with the base model and the other is with some markings created on the surface. The images were simulated using Blender.</p> <p>Each acquisitions contained the simulated RGB images as well as depth maps and normal maps computed by Blender using the 3D model. Also included is a .blend file used for the simulation after modification which includes the 3D model. There is also a .lp file which describes the light positions used.</p>
SFF-RTI simulated imagery - Statue du parc d'Austerlitz
<p>A set of simulated image acquisitions using the 3D model of a statue hosted on Sketchfab by `Archeomatique` (Link: https://skfb.ly/o6uVZ). As such, the 3D model itself cannot be made open-access. The images were simulated using Blender version 3.3.1.</p> <p>Each acquisition contains the simulated RGB images as well as depth maps and normal maps computed by Blender using the 3D model. There also exists a folder with output processed using shape from focus (SFF) and SFF-RTI, a method proposed in a to-be-published journal paper. A CSV is also included with computed statistics for each acquisition.</p> <p>The acquisitions contained within this zip file are organized into:</p> <p><strong>Ground truth</strong> - Ground truth images without any variation in light position. Also simulated without an aperture so that there is no simulated optical blurring.</p> <p><strong>SFF </strong>- Acquisitions to be used with the shape from focus method.</p> <p><strong>SFF-RTI</strong> - Acquisitions that combine the focus variation from shape from focus with the varying light position using in multi-light imaging methods such as photometric stereo and reflectance transformation imaging.</p> <p> </p>
Wood Normal Map RTI
Using RTI to generate the diffuse and normal maps, I was able to make them into a 2.5D relit texture. I wish I had the ability to create specular and diffuse maps, but I don't think I'd be able to write programs to do that for me. Thanks to CHI and Leszek Pawlowicz for the amazing documentation and programs. Scans were done by AISOS, a part of LATIS Labs in the College of Liberal Arts at the University of Minnesota, Twin Cities. Source: Objaverse 1.0 / Sketchfab
Quarter Normal Map RTI
Finally a test of the newly completed small RTI dome, with 48 LEDs instead of the 64 of the big dome. Have a look at that sweet matcap! Scans were done by AISOS, a part of LATIS Labs in the College of Liberal Arts at the University of Minnesota, Twin Cities. Source: Objaverse 1.0 / Sketchfab
Tembetá from Abreu Garcia Cluster 8 Cremated Deposit RTI First Release
<p>First release of RTI file for stone tembetá (lip-plug) recovered from Cluster 8 cremated deposit of Mound A, at the Abreu Garcia Mound and Enclosure complex, Santa Catarina, Brazil during the 2015 excavation season as part of the Jê Landscapes of Southern Brazil project. Created with 13 images using RTIBuilder 2.0.2 and the Hemispherical Harmonics (HSH) fitter.</p> <p>Primeira divulgação do arquivo de RTI de um adorno labial em pedra - tembetá recuperado do depósito de remanescentes cremados - Cluster 8 no Mound A, no MEC Abreu & Garcia, Santa Catarina, Brasil, durante a campanha de escavação de 2015, como parte do projeto Paisagens Jê do Sul do Brasil. Criado com 13 imagens usando RTIBuilder 2.0.2 e Hemispherical Harmonics (HSH) fitter.</p>
Chocolate Tray Photogrammetry and RTI Model
I utilized Agisoft Photoscan to create the mesh many days ago. Today I used RTI by way of a custom dome apparatus and CHI's programs to create a normal map of the surface of the same object and manipulated it in photoshop to match the UV as closely as possible. Scans were done by AISOS, a part of LATIS Labs in the College of Liberal Arts at the University of Minnesota, Twin Cities. Source: Objaverse 1.0 / Sketchfab
Carved Block Normal Map RTI
A test of RTI on carved wood. Scans were done by AISOS, a part of LATIS Labs in the College of Liberal Arts at the University of Minnesota, Twin Cities. Source: Objaverse 1.0 / Sketchfab
Deer Stamp Normal Map RTI & Specular
I decided to try some photoshop filtering to get a loose specular map for this model. I think it turned out pretty nice. Normal map is from RTI method and the model was generated in Blender. As usual with RTI stuff, the matcap is definitely worth looking at. Scans were done by AISOS, a part of LATIS Labs in the College of Liberal Arts at the University of Minnesota, Twin Cities. Source: Objaverse 1.0 / Sketchfab
Detail RTI view of BK-L 9126-18398
<p>This is the detailed view of the large limestone slab bearing the rhino image, found in square Q56/33 and on level Pl. 2.2.1 of the excavation of Bad-Kösen-Lengefeld/Germany. The Reflectance Transformation Imaging technique was executed with the help of a RTI dome with a radius of 50cm. The camera used was a Nikon Z7 with a 50mm lens and 64 images were taken. The black sphere has a diameter of 2,5cm. The taking of the images and post-processing took place on 09.06.2021-10.06.2021.</p> <p>The limestone slab is in possession of the Institute of Prehistory of the University of Cologne, Germany.</p>
Safety and Efficacy Study of Guaifenesin and Pseudoephedrine for Symptomatic Therapy to Treat Acute RTI
ClinicalTrials.gov study NCT01202279. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Use of Real Time Instrumentation (RTI) in Total Shoulder Arthroplasty
ClinicalTrials.gov study NCT01905241. IPD Sharing: NO. Countries: 1. Publications: 1.
A Trial of 2 Options for Second Line Combination Antiretroviral Therapy Following Virological Failure of a Standard Non-nucleoside Reverse Transcriptase Inhibitor (NNRTI)+2N(t)RTI First Line Regimen
ClinicalTrials.gov study NCT00931463. IPD Sharing: Not stated. Countries: 17. Publications: 4.
Safety, Tolerability, and Pharmacokinetics of Single, Escalating Oral Doses of RTI-336 in Healthy, Male Subjects
ClinicalTrials.gov study NCT00808119. IPD Sharing: Not stated. Countries: 1. Publications: 1.
A Nutritional Trial on Effect of L. Rhamnosus Yoba on RTI and Other Health Outcomes Among Children (3-6 Years) in Uganda
ClinicalTrials.gov study NCT03990220. IPD Sharing: NO. Countries: 1. Publications: 5.
Effect of L. Rhamnosus Yoba on RTI and Other Health Outcomes Among Children (3-6 Years) in Uganda
ClinicalTrials.gov study NCT04144491. IPD Sharing: NO. Countries: 1. Publications: 5.
First ISCCP Regional Experiment (FIRE) Cirrus 2 Volume Imaging Lidar (VIL) Altitude vs. Time (RTI) Data
The First ISCCP Regional Experiments have been designed to improve data products and cloud/radiation parameterizations used in general circulation models (GCMs). Specifically, the goals of FIRE are (1) to seek the basic understanding of the interaction of physical processes in determining life cycles of cirrus and marine stratocumulus systems and the radiative properties of these clouds during their life cycles and (2) to investigate the interrelationships between ISCCP data, GCM parameterizations, and higher space and time resolution cloud data. To-date, four intensive field-observation periods were planned and executed: a cirrus IFO (October 13 - November 2, 1986); a marine stratocumulus IFO off the southwestern coast of California (June 29 - July 20, 1987); a second cirrus IFO in southeastern Kansas (November 13 - December 7, 1991); and a second marine stratocumulus IFO in the eastern North Atlantic Ocean (June 1 - June 28, 1992). Each mission combined coordinated satellite, airborne, and surface observations with modeling studies to investigate the cloud properties and physical processes of the cloud systems.This data set contains altitude vs. time images (RTIs) of cirrus clouds collected during FIRE Cirrus 2 at Coffeyville, Kansas. The images were sampled at 5 km intervals in the cross wind scans.
Video: Integrating Multispectral Imaging, Reflectance Transformation Imaging (RTI), and Photogrammetry for Archaeological Objects
<p>Video of talk presented remotely at the session "Illumination of Material Culture Symposium II" at Digital Heritage 2018 on October, 26, 2018. A method for combining multiple forms of imagery, including RTI and Multispectral Imaging, with 3D models is summarized and illustrated by still images and animation.</p>
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.