Lmst

This book presents a comprehensive exploration of moiré #tomography and its application to structural visualization and key-parameter diagnosis in high-temperature complex flow fields.
More info : https://buff.ly/D8vZCSD

Giant ‘Gravity Hole’ in the Ocean May Be the Ghost of an Ancient Sea
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https://www.scientificamerican.com/article/giant-gravity-hole-in-the-ocean-may-be-the-ghost-of-an-ancient-sea1/ <-- shared technical media article
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https://doi.org/10.1029/2022GL102694 <-- shared 2023 paper
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https://oceanservice.noaa.gov/facts/geoid.html <-- technical description of a geoid
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[theories abound]
"... KEY POINTS
• Employing time dependent global mantle convection models since the Cretaceous. [the authors] simulate the origin of the enigmatic Indian Ocean geoid low
• Plumes forming along the edges of the African Large Low Shear Velocity province (LLSVP) control the regional geoid in the Indian Ocean
• These plumes, in turn are generated by lower mantle Tethyan slabs that perturb the African LLSVP…”
#GIS #spatial #mapping #geoid #gravity #mapping #global #remotesensing #plume #ocean #ancientocean #gravityhole #geophysics #IndianOcean #geology #structuralgeology #crust #mantle #core #high #low #potsdamgravitypotato #IOGL #tomography #model #modeling #plate #tectonicplate #Tethys #slab #mantleplume #LLSVP #AfricanLargeLowShearVelocity

Sept 11: Christoph Lerche (@fzj) on tomographic reconstruction in MRI, CT & PET. Understand the fundamentals behind 3D medical images.

@helmholtz
#imaging #MedicalImaging #Tomography

8-channel high-speed #OpenSource #electrical #impedance #tomography device implemented on a programmable #system-on-a-chip:

#EIT is a non-invasive #imaging technique providing info about the internal #conductivity distribution of a body/object

https://doi.org/10.1016/j.ohx.2025.e00667
#DIYbio #lab #instruments #SoC

Following on from their successful meeting in 2023, @J_Cell_Sci are delighted to announce a second iteration of the Imaging Cell Dynamics Meeting to be held in 2026.

Find out more:

https://www.biologists.com/meetings/jcsimaging/

#Cells #CellDyamics #CellScience #Imaging #JCS #Microscopy #SuperResolutionImaging #ElectronMicroscopy #Tomography #ExpansionMicroscopy #OrganelleDynamics #MembraneTrafficking #CytoskeletalDynamics #TissueDynamics #ImageAnalysis #LightMicroscopy #Microscope

Journal of Cell Science Meeting
Imaging Cell Dynamics
11-14 May 2026
Montanyà Hotel, Catalonia, Spain
Register your interest

✨ Ever wondered how to effortlessly apply lazy expressions to massive tomographic HDF5 datasets and visualize them instantly in Cat2Cloud? 🤯

🎬 Check out this fantastic new video from our very own Luke Shaw! Discover how a bit of Python 🐍 magic and our user-friendly web interface simplify the process.

👇 Watch the full video to see the magic unfold: https://ironarray.io/cat2cloud

#HDF5 #Tomography #LazyEvaluation #DataVisualization #Cat2Cloud

is happy to have spent *so much* time on automated extraction of single fish from 20 combined tomographic scans (20 x 6 fish) a while ago. Because re-doing this on a fresh TB batch of 8 scans (48 fish) of nearly equal fish is done in half a morning. See https://github.com/habi/sticklebacks for the #Jupyter notebooks. #tomography #ecology

Screenshot of napari with loaded 3D data

Biomass - ESA's Forest Mission – Mapping Biomass From Space - Overview Video
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#GIS #spatial #mapping #biomass #satellite #remotesensing #earthobservation #spatialanalysis #spatiotemporal #vegetation #forest #radar #canopy #tomography #imaging #geomorphometry #forests #carbon #carbonaccounting #climatescience #management #planning #ecosystems #ESA

Biomass - ESA's Forest Mission – Mapping Biomass From Space
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https://www.esa.int/Applications/Observing_the_Earth/FutureEO/Biomass <-- shared Biomass information hub
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#GIS #spatial #mapping #biomass #satellite #remotesensing #earthobservation #spatialanalysis #spatiotemporal #vegetation #forest #radar #canopy #tomography #imaging #geomorphometry #forests #carbon #carbonaccounting #climatescience #management #planning #ecosystems
#ESA

is happy to hear that https://doi.org/10.1101/2024.11.10.622888 “has been judged scientifically suitable for publication" in PLOS One after a round of peer review. Once "it meets all outstanding technical requirements" it will be published online. For the moment you all have to read the bioRxiv version. And can nonetheless already look into the full dataset yourself, for example at https://webknossos.org/links/U8wuIdhmfzWMr7rm

#tomography #microct #femaleanatomy #science

A $100 DIY muon tomographer
https://spectrum.ieee.org/diy-muon-tomography
#ycombinator #arduino #geiger_counter #muons #remote_sensing #tomography #type_departments

$100 Muon Detector Lets You Harness the Cosmos
https://spectrum.ieee.org/diy-muon-tomography
#ycombinator #arduino #geiger_counter #muons #remote_sensing #tomography #type_departments

In unserer onlinenen #Ringvorlesung heute:

Basics of #XRay #Imaging and Computed #Tomography #CT

15:30 Uhr mit @mosterh1 von der @unigoettingen

Einwahl: https://kit-lecture.zoom-x.de/j/65527468773?pwd=axMdaXp5Jebvan8TVz9qbo4bkL3MHl.1

Kenncode: whsj=71J

#Synchrotron #Röntgen #Forschung #NFDIRocks

Vortragsfolie, Titel: „The Many Dimensions of X-Ray Imaging II“.

Gezeigt wird in vielen symbolischen Koordinatensystemen ein Überblick über verschiedene Parameter (Beispiele: Belichtungszeit, Wellenlänge, Dimensionalität, Gesichtsfeld; aber auch Konzepte wie Fern- und Nahfeld, Vollfeld und Raster; Rekonstruktionsverfahren ohne, Einzelschritt, iterativ) bei der Bildgebung vermöge Röntgenstrahlung; in rot überlagert sich weitere Stichworte (etwa: Holografie, Ptychografie, Gerchberg-Saxton-Algorithmus; pink beam vs Si-111-Monochromator), welche spezielle Messmethoden charakterisieren.

New paper, just published in Physical Review X Energy, on the muography of the G3 nuclear reactor

by Baptiste Lefevre and co-authors
https://doi.org/10.1103/PRXEnergy.4.013002

The visualization software I developed for #Cosmology contributed in the mapping of the inner, inaccessible structure of the reactor.

▶️ see the video and interactive visualization here: https://journals.aps.org/prxenergy/abstract/10.1103/PRXEnergy.4.013002#supplemental

#Physics #Muography #Nuclear #NuclearReactor #science #STEM #engineering #Energy #G3 #Muons #MuonTomography #tomography

A screenshot captured on the frontpage of the Physical Review X Energy webpage showing an article thumbnail image, title, summary and other details. Title reads "3D Reconstruction of a Nuclear Reactor by Muon Tomography: Structure Validation and Anomaly Detection". Summary reads "Muon tomography, a non-invasive technique that can be used to image large, inaccessible structures, is combined with machine learning to create a 3D reconstruction of a historical nuclear reactor that reveals material density variations, including potential anomalies in the graphite core." Dated 28 January, 2025. Thumbnail image shows a 3D reconstructions and slices of the density field of the reactor.

A screenshot of a figure of the article, featuring a black on white technical drawing mixed with a colorful 3D visualization. Captions reads "3D visualization of the postprocessing of SART’s real data reconstruction, showing an isosurface of the density field 𝑑 =1.5 together with a 𝑦 =0 slice and the corresponding technical drawing. This 3D visualization is complemented by a video in Supplemental Material".

A screenshot of a figure of the article, featuring a colorful 3D visualization against a white background. Caption reads "3D visualization of the postprocessing of SART’s real data reconstruction, showing an isosurface of 𝑑 =1.5 together with 𝑦 =0 and 𝑧 =0 slices. This three-dimensional rendering of the density field is complemented by an interactive 3D visualization in Supplemental Material".

Gleich beginnt die nächste Postersitzung beim #DESY Nutzerinnentreffen #UM25 – mein heutiger Beitrag:

"#FPGA Based Live-Reco for #Tomography: Preparing for 4th Generation Data Rates"

Mit dem Upgrade zum #PetraIV #Synchrotron erwarten wir eine rund hundertfach höhere Datenrate, speziell in der Parallelstrahl-#Tomografie an der #GINIX könnten es ca. 3 Petabyte täglich werden. Hier studieren wir eine Live-Rekonstruktion des Datenstroms mittels programmiererbarer Hardware.

https://sci.photos/QR/UM25/#ginix

Das wissenschaftliche Poster beschreibt den Einsatz von FPGAs (Field Programmable Gate Arrays) in der Echtzeit-Tomographie und deren Vorbereitung auf die Datenvolumen der vierten Generation von Synchrotronstrahlungsquellen. Es wurde von der Universität Göttingen und DESY Photon Science entwickelt.

– FPGA Based Live-Reco for Tomography: Das Poster stellt dar, wie FPGAs verwendet werden, um die Datenverarbeitung in der Tomographie zu optimieren, insbesondere für das Göttingen Instrument for Nano-Imaging with X-Rays (GINIX) an den PETRA III und IV Strahlrohren.
– Contrast Transfer Function - Fourier Filter: Es wird erläutert, wie die Kontrastübertragungsfunktion mit Hilfe eines Fourier-Filters modelliert und als Faltung im Realraum implementiert wird. Hierbei werden Vorteile der FPGA-basierten Verarbeitung, wie schnelle Fourier-Transformationen und Realraumfaltungen, diskutiert.
– Fourier vs. Convolution: Vergleich der Methoden in Bezug auf die Bildrekonstruktion und Datenverarbeitungseffizienz.
– GINIX II @ PETRA IV: Processing Problem: Ein Abschnitt des Posters befasst sich mit den Herausforderungen der Datenverarbeitung bei hochauflösender Nano-Bildgebung, wobei Lösungsansätze über FPGAs aufgezeigt werden.
– FPGAs as Pipelined Streaming Processor: Hier wird die Überlegenheit von FPGAs gegenüber traditionellen CPUs hervorgehoben, insbesondere hinsichtlich ihrer Programmierbarkeit und Fähigkeit zur Verarbeitung von Streaming-Daten.

[ChatGPT 4o]

Atop The Oregon Cascades, [Research] Team Finds A Huge Buried Aquifer
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https://www.eurekalert.org/news-releases/1069774 <-- shared technical article
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https://doi.org/10.1073/pnas.2415155122 <-- shared paper
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https://www.usgs.gov/centers/oregon-water-science-center/science/mckenzie-river-source-water-study <-- shared USGS technical article, 2011, ‘McKenzie River Source Water Study’
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https://youtu.be/6R8e5HwGMwU?si=sniW4bvvzzviTYie <-- shared media video overview
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#GIS #spatial #mapping #model #modeling #water #hydrology #Oregon #Cascades #CascadeMountains #PNW #PacificNorthwest #volcanic #rocks #aquifer #waterresources #watermanagement #climatechange #snowpack #drought #spatialanalysis #CriticalZone #geohazards #geology #engineeringgeology #landscapes #weathering #bedrock #holocene #groundwater #structuralgeology #orogeny #remotesensing #geophysics #sampling #drilling #porosity #permability #tomography #lava #spring #seep #breccia #discharge #streams #runoff #precipitation #climate #rainfall #recharge

photo - Scientists examine a large-volume spring in young volcanic rocks of the McKenzie River watershed on the west side of the Cascade topographic crest that was monitored as part of this study. Credit: Benjamin Nash

map, photo and charts - (A) Electrical resistivity tomography of Olallie North Spring, which emerges along a flow contact of _25 ka Scott Mountain lava flows. Lateral variations correspond to spring discharge points along the lava flow basal breccia such as depicted in (B) (photo: Benjamin Nash). (C) Mean of total yearly range in discharge _Q divided by mean annual flow Qavg versus average upstream age for springs and streams. The horizontal line defines “spring-” versus “runoff-” dominated. (D) SD of yearly average summer discharge (June–September), normalized by Qavg, with CZ state shift labeled.

$maps and chart - (A) Distribution of geothermal drill holes. Thin black circles’ radii scale with total logged length, and colors indicate the fraction of length for which dT=dz < 20_C/km (implying downward flux of meteoric water). Red circles are the fraction with inverted gradients (dT=dz < 0_C/km). The purple contour indicates bedrock ages <2 Ma, while stars mark Holocene age phreatomagmatic eruption vents. (B) Two example temperature-depth logs from deep wells in old and young bedrock. (C) Porosity (blue) and resistivity (orange) in the Santiam Pass drill hole SP 77-24. Dashed lines indicate low porosity at high measured resistivity. (D) Chemical weathering tracked by oxidation state of iron in the Santiam Pass drill hole. The green box indicates range of Quaternary High Cascades lavas (SI Appendix), indicating that much of the SP 77-24 hole has been oxidized.$