Tootfinder

Nahe dem #Gletscher #Múlajökull in #Island zeigt sich im Sommer eine farbenreiche Landschaft.
Sedimentreiches

The InSAR absolute phase amid singularities
Simon Zwieback
https://arxiv.org/abs/2507.23036 https://arxiv.org/pdf/2507.23036…

The InSAR absolute phase amid singularities
The radar interferometric absolute phase is essential for estimating topography and displacements. However, its conventional definition based on the range difference is idealized in that it cannot be applied to complex, dynamic targets. Here, a universal observational definition is proposed, which is easiest to describe for differential interferometry: The absolute phase is determined by temporally unwrapping the phase while continuously varying the intermediate acquisition time between primary…

from my link log —
ECFiber: building a fibre-to-the-premises network in rural Vermont.
https://blog.apnic.net/2021/02/18/building-your-own-fibre-to-premises-network/
saved 2021-02-18

Building your own Fibre-to-Premises Network: The ECFiber Story | APNIC Blog
How to build and operate a FTTH network when existing infrastructure, topography, and low population all work against the need for fast Internet

Optimal Control of Thin-Film Flow on a Flexible Topography
S. Alrashidy, A. Kalogirou, D. Kalise, K. G. van der Zee
https://arxiv.org/abs/2506.15340 https:…

Optimal Control of Thin-Film Flow on a Flexible Topography
This work presents a mathematical model for the optimal control of thin-film flows over a flexible topography influenced by an external force. Our thin-film model allows for the rupture of films as well as the coalescence of bubbles. The objective is to find the optimal distributed force acting on the topography that minimises the differences between actual and desired thin-film profiles. A nonlinear lubrication equation governing the fluid dynamics and appropriate functional settings for this …

Long time existence for a Boussinesq-like system with strong topography variation
Qi Lu, Jean-Claude Saut, Li Xu
https://arxiv.org/abs/2507.17282 https://a…

Long time existence for a Boussinesq-like system with strong topography variation
We prove the long time existence of solutions of a Boussinesq system with strong topography variations.

High-speed quantitative nanomechanical mapping by photothermal off-resonance atomic force microscopy
Hans Gunstheimer, Gotthold Fl\"aschner, Jonathan D. Adams, Hendrik H\"olscher, Bart W. Hoogenboom
https://arxiv.org/abs/2506.16226

High-speed quantitative nanomechanical mapping by photothermal off-resonance atomic force microscopy
Atomic force microscopy (AFM) is widely used to measure surface topography of solid, soft, and living matter at the nanoscale. Moreover, by mapping forces as a function of distance to the surface, AFM can provide a wealth of information beyond topography, with nanomechanical properties as a prime example. Here we present a method based on photothermal off-resonance tapping (PORT) to increase the speed of such force spectroscopy measurements by at least an order of magnitude, thereby enabling hi…

Visited my 95-year-old Mom in Saskatchewan and came away with Prairie pictures and thoughts on memory and topography and Google color science and healthcare economics. https://www.tbray.org/ongoing/When/202x/2025/07/09/Saskatchewan

Memory in Saskatchewan

Novel Approximation of the Modified Mild Slope Equation
Chengnian Xiao
https://arxiv.org/abs/2506.19854 https://arxiv.org/pdf/2506.19…

Novel Approximation of the Modified Mild Slope Equation
The mild-slope equation and its various modifications aim to model, with varying degrees of success, linear water wave propagation over sloping or undulating seabed topography. However, despite multiple modifications and attempted simplifications, the different variants of the equation include multiple higher order terms involving the nonlinear water wave dispersion relation and thus remain analytic intractable. To further facilitate its use, we derive a drastically simplified alternative versi…

Weekend #Plankton Factoid 🦠🦐
The new Surface Water and Ocean Topography (SWOT) satellite is crazy accurate. It can measure ocean altimetry to a mm, imaging internal waves and small sub eddies (rotating mixing zones). Tiny changes in height happen when water swirls (try it in a sink) with greater height at the edges due to centripetal force. These may be even more important for temperature &a…

Hurricane Impact Index for Assessing Direct and Indirect Hazards in Central America
Manrique Camacho, Amanda Cede\~no, Luis A. Barboza, Shu Wei Chou-Chen, Mario J. G\'omez, Hugo G. Hidalgo
https://arxiv.org/abs/2506.19858

Hurricane Impact Index for Assessing Direct and Indirect Hazards in Central America
Hurricanes rank among the most destructive natural hazards. They are complex phenomena that can cause both direct damage along their path and indirect impacts due to heavy rainfall and strong winds, with effects varying according to regional topography. In this paper, we propose a Hurricane Impact Index to assess both direct and indirect hazards, and we demonstrate its applicability to the Central American region. The index is constructed so that we can decompose these effects across multiple d…

The role of spin-orbit coupling and state-crossing topography in the non-radiative decay of Ir(III) complexes
Ivan Soriano-Diaz, Ilya D. Dergachev, Sergey A. Varganov, Enrique Orti, Angelo Giussani
https://arxiv.org/abs/2506.07682

The role of spin-orbit coupling and state-crossing topography in the non-radiative decay of Ir(III) complexes
A pillar of our current understanding of the photoluminescence of Ir(III) complexes is the assumption that the population of triplet metal-centered states determines an efficient non-radiative decay to the ground state minimum. Based on that assumption, the energy separation between the emitting state and the minimum-energy crossing point of the triplet metal-centered and the ground states has been employed as a key variable for evaluating the ability of Ir(III) complexes to decay non-radiative…

Topographic alignment of auditory inputs to the visual cortex (in mice) https://www.biorxiv.org/content/10.1101/2025.07.29.667237v1 More information in the Bluesky thread

Computation and Sensitivity Analysis of the Deformation-Gradient Tensor Reconstruction in Dark-Field X-ray Microscopy
Brinthan Kanesalingam, Darshan Chalise, Carsten Detlefs, Leora Dresselhaus-Marais
https://arxiv.org/abs/2507.17929

Computation and Sensitivity Analysis of the Deformation-Gradient Tensor Reconstruction in Dark-Field X-ray Microscopy
Spatially resolved strain measurements are crucial to understanding the properties of engineering materials. Although strain measurements utilizing techniques such as transmission electron microscopy and electron backscatter diffraction offer high spatial resolution, they are limited to surface or thin samples. X-ray diffraction methods, including Bragg Coherent Diffraction Imaging and X-ray topography, enable strain measurements deep inside bulk materials but face challenges in simultaneously …

Revisiting Fourier-Based Reflection Spectrum Measurement in Coherence Scanning Interferometry
Cheng Chen, Sotero Ordones, Jeremy Coupland, Rong Su
https://arxiv.org/abs/2506.12866

Revisiting Fourier-Based Reflection Spectrum Measurement in Coherence Scanning Interferometry
Recent advancements have extended the capabilities of coherence scanning interferometry (CSI) beyond surface topography measurement to reflectivity spectrum imaging. It is commonly accepted that the one-dimensional(1-D) Fourier magnitude of a pixel-wise CSI signal is proportional to the product of the sample's absolute reflection coefficient spectrum and the light source spectrum. However, this assumption holds true only for low numerical aperture (NA) CSI systems. In this work, we establish a …

Slantwise convection and heat transport in the icy moon oceans
Yaoxuan Zeng, Malte F. Jansen
https://arxiv.org/abs/2508.06480 https://arxiv.org/pdf/2508.06…

Slantwise convection and heat transport in the icy moon oceans
Ocean heat transport on icy moons shapes the ice shell topography, a primary observable of these moons. Two key processes control the heat transport: baroclinic instability driven by surface buoyancy contrasts and convective instability driven by heating from the core. However, global ocean simulations cannot accurately resolve convection under realistic icy moon conditions and instead often use Earth-based convective parameterizations, which capture only vertical convective mixing and cannot r…

Neural Field-Based 3D Surface Reconstruction of Microstructures from Multi-Detector Signals in Scanning Electron Microscopy
Shuo Chen, Yijin Li, Xi Zheng, Guofeng Zhang
https://arxiv.org/abs/2508.04728

Neural Field-Based 3D Surface Reconstruction of Microstructures from Multi-Detector Signals in Scanning Electron Microscopy
The scanning electron microscope (SEM) is a widely used imaging device in scientific research and industrial applications. Conventional two-dimensional (2D) SEM images do not directly reveal the three-dimensional (3D) topography of micro samples, motivating the development of SEM 3D surface reconstruction methods. However, reconstruction of complex microstructures remains challenging for existing methods due to the limitations of discrete 3D representations, the need for calibration with refere…

Evaluation of Analytical Turbulence Closures for Quasi-Geostrophic Ocean Flows with Coastal Boundaries
Anantha Narayanan Suresh Babu, Akhil Sadam, Pierre F. J. Lermusiaux
https://arxiv.org/abs/2508.06678

Evaluation of Analytical Turbulence Closures for Quasi-Geostrophic Ocean Flows with Coastal Boundaries
Numerical turbulence simulations typically involve parameterizations such as Large Eddy Simulations (LES). Applications to geophysical flows, especially ocean flows, are further complicated by the presence of complex topography and interior landforms such as coastlines, islands, and capes. In this work, we extend pseudo-spectral quasi-geostrophic (QG) numerical schemes and GPU-based solvers to simulate flows with coastal boundaries using the Brinkman volume penalization approach. We incorporate…

Ice-free geomorphometry of Queen Maud Land, East Antarctica: 1. S\^oya Coast
I. V. Florinsky, S. O. Zharnova
https://arxiv.org/abs/2508.10462 https://arxiv…

Ice-free geomorphometry of Queen Maud Land, East Antarctica: 1. Sôya Coast
Geomorphometric modeling and mapping of ice-free Antarctic areas is promising for obtaining new quantitative knowledge about the topography of these unique landscapes and for the further use of morphometric information in Antarctic research. Within the framework of a project of creating a physical geographical thematic scientific reference geomorphometric atlas of ice-free terrains of Antarctica, we performed geomorphometric modeling and mapping of key ice-free areas of the Sôya Coast (the eas…

This https://arxiv.org/abs/2410.19934 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Turbulence in Earth's core generates large topographic torques on the mantle
Seismic and geodynamic studies indicate that the boundary between the Earth's liquid outer core and solid mantle is not spherical, but is likely characterized by topography in the form of inverted mountains and valleys that have typical amplitudes of several kilometers. One of the dynamical consequences of these deformations is that turbulent flow in the core can exert pressure torques on the mantle, thereby resulting in a transfer of angular momentum between the outer core and the mantle. Unde…

This https://arxiv.org/abs/2311.02275 has been replaced.
initial toot: https://mastoxiv.page/@arXi…

Rapid topographic scatter of near-inertial waves generated by storms
Internal waves propagate on the ocean's stratification, carrying energy and redistributing momentum through the ocean. When internal waves break, they contribute to diapycnal mixing in the ocean interior, but this breaking behaviour depends upon the scale of the waves. Low-mode internal waves have larger horizontal and vertical scales, and thus break less readily than higher-mode waves. The scattering of internal waves by topography is an important mechanism in transferring internal wave energy…

This https://arxiv.org/abs/2410.17089 has been replaced.
initial toot: https://mastoxiv.page/@arXi…

Asymmetric response of the North Atlantic gyres to the North Atlantic Oscillation
The North Atlantic Oscillation (NAO) is a leading mode of atmospheric variability, affecting the North Atlantic Ocean on sub-seasonal to multi-decadal timescales. The NAO changes the atmospheric forcing at the ocean's surface, including winds and surface buoyancy fluxes, both of which are known to impact large-scale gyre circulation. However, the relative role of other physical processes (such as mesoscale eddies and topography) in influencing gyre circulation under NAO variability is not fully…