Of course this was known to many famous #mathematicians, like #Euler and #Jacobi and they solved the equations in terms of #EllipticIntegrals. I find it satisfying to be able to visualize the #dynamics of the this system, using #FreeSoftware, such as #WxMaxima.
High Spatial-Resolution Satellite Mapping Of Suspended Particulate Matter In Global Coastal Waters Using Particle Composition-Adaptive Algorithms
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https://doi.org/10.1016/j.rse.2025.114745 <-- shared paper
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https://tssmapping.projects.earthengine.app/view/sscmap <-- shared SedXplorer: Global Coastal Suspended Sediment Explorer (web mapping tool)
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#GIS #spatial #mapping #remotesensing #coastal #coast #sediment #dynamics #suspendedparticulatematter #particlecomposition #watertype #classification #Landsat #GoogleEarth #GoogleEarthEngine #GEE #opendata #spatialanalysis #spatiotemporal #sedimentology #SPM #earthobservation #model #modeling #marine #estaurine #water #hydrology #geomorphology #global #river #erosion #waterquality #turbidity
How can #science be made comprehensible through #art? 
Liliane Burkhard from #unibern showed this as #artist in residence at @EuroGeosciences in Vienna. Her #installation of used conference posters illustrates the #dynamics of scientific ideas: https://www.uniaktuell.unibe.ch/2025/making_science_tangible_with_art/index_eng.html
Assessment Of Snow Cover Dynamics And The Effects Of Environmental Drivers In High Mountain Ecosystems
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https://doi.org/10.1016/j.eiar.2025.107969 <-- shared paper
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#GIS #spatial #mapping #remotesensing #earthobservation #snow #ice #snowcover #dynamics #climatechange #mountains #ecosystems #spatialanalysis #spatiotemporal #MODIS #model #modeling #extremeweather #water #hydrology #climate #zones #trendanalysis #linearregression #RandomForest #cryosphere
New video! https://youtube.com/@jamesbruton/videos yes it can stand still on the spot!
A new COPASI version 4.45 was released.
New features:
- tool to parse arbitrary ODEs into reaction-based model.
- menu entry allowing definition and running of external tools (scripts ,etc)
Many bug fixes, including:
- better scaling for MCA in the presence of small compartment volumes
- fixed intervals for time courses running backwards (negative time)
- improvement in steady state criteria in models with conserved moieties
- Improved parsing SED-ML & SBML
https://copasi.org/Download/
#SystemsBiology #Chemistry #Simulation #Dynamics
Hello Mastodon!
This is the official account for COPASI, the popular open source software for modeling and simulation of biochemical reaction networks
#SystemsBiology
#Chemistry
#Kinetics
#ChemicalKinetics
#ReactionNetworks
#Dynamics
#ComputationalModels
Compound Weather And Climate Events In 2024
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https://doi.org/10.1038/s43017-025-00657-y <-- shared technical article
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#GIS #spatial #mapping #global #extremeweather #climate #climatechange #highimpact #compoundevents #spatiallycompounding #water #hydrology #SouthernAfrica #HurricaneHelene #heatwave #drought #risk #hazard #flood #flooding #marine #ocean #ecosystems #humanimpacts #naturaldisaster #naturalhazards #infrastructure #costs #economics #society #USA #Nepal #China #Australia #soil #rainfall #precipitation #storms #UK #damage #spatialanalysis #spatiotemporal #multivariate #monitoring #remotesensing #earthobservation #dynamics #mitigation #planning #watersecurity #foodsecurity #agriculture #crops #impacts
Interpretable Physics-Informed Graph Neural Networks For Flood Forecasting
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https://doi.org/10.1111/mice.13484 <-- shared paper
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https://github.com/MehdiTaghizadehUVa/modulus/tree/main/examples/weather/flood_modeling/hydrographnet <-- shared GitHub repository
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#GIS #spatial #mapping #FloodForecasting #GraphNeuralNetworks #PhysicsInformedAI #Hydrology #ClimateResilience #ScientificMachineLearning #CivilEngineering #HydroGraphNet #PhyiscsNeMo #hydrology #water #flood #flooding #spatialanalysis #spatiotemporal #climatechange #model #modeling #machinelearning #AI #extremeweather #prediction #forecasting #planning #humanimpacts #loss #lossoflife #publicsafety #cost #economics #infrastructure #risk #hazard #disaster #mitigation #preparedness #naturaldisaster #HydroGraphNet #floodforecasting #dynamics #remotesensing #earthobservation
Guten Morgen #Fediverse
Heute auf dem Programm: EDI-Schnittstelle weiter entwickeln in #Microsoft #Dynamics #NAV 2015 ... #ORDERS wollen importiert werden.
For the five cases here, the integrals can be calculated exactly, although they turn out to be piecewise functions.
The equivalent dynamic response curves now look somewhat complicated and are here.
It is difficult to explain the meaning of these curves to someone who is unfamiliar and it took me a while to figure out what they related to. Even then, explaining them to others is equally challenging.
A little more advanced is response of a structure to #Non-periodic #loads and this involves #ConvolutionIntegrals.
(Continues...)
The #DynamicResponse for periodic loading is quite widely known and looks like this, where beta is the ratio of the forcing to natural frequencies and xi is damping ratio.
When the two frequencies are close (beta is around 1) then you can get resonance occuring and this can be hazardous as the dynamic deflections are so much larger than their static equivalents. Fmax is termed the #DynamicMagnificationFactor.
(Continues...)
When I was studying #DynamicLoading of a #Structure, at least for the case of small deflections and a single-degree-of-freedom, we covered both #Periodic and #ImpulsiveLoads. The former take place over an extended period and so damping is important, while for the latter, if they are short-lived, then damping can be neglected.
(Continues...)
Vortex Trapping Of Suspended Sand Grains Over Ripples
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https://doi.org/10.1029/2023JF007620 <-- shared paper
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“KEY POINTS
• Observations of vortex-trapped grains suggest delayed settling of advected grains, as well as delayed advection of grains mobilized from the bed
• Quantitative comparisons of vortex-trapped sand grains compared well with theoretical formulations by Nielsen (1992, https://doi.org/10.1142/1269) for a forced vortex
• Improved understanding of vortex trapping effects on sediment dynamics may decrease uncertainty in large-scale coastal model predictions..."
#spatial #model #modeling #water #hydrology #hydrodynamics #vortex #sand #sediment #transport #sedimentation #sedimentology #morphodynamics #fluiddynamics #ripples #coast #coastal #research #velocimetry #suspension #experimentation #dynamics #geology #processes #geomorphology #geomorphometry #vortextrapping #sand #grains #flow #ripple #sandwaves #ripples
Forgive the recent apparent obsession (I’d call it a fascination) with the #cycloid but I’ve just discovered something I’d not heard of before. It is also called a #TautochroneCurve or #Isochrone curve, which means that a particle starting from any location on the curve will get to the #MinimumPoint at precisely the same time as a particle starting at any other point.
Interestingly, it is also the curve that solves the #Brachistochrone problem, which means that starting at a cusp on the inverted curve (maximum height), a frictionless ball will roll under uniform gravity in minimum time from the start to any other point on the curve, even beating the straight line path.
Greg Cocks 
