Tootfinder

Cheap Musical Tesla Coil Put Through Its Paces
https://poliverso.org/display/0477a01e-67581177-83605d557de0cef2
Cheap Musical Tesla Coil Put Through Its Paces Once upon a time, musical Tesla coils were something you primarily saw at high-voltage hob…

Dimarzio Cruisers
I have a 2008 Roland Ready Stratocaster. It came with three ceramic single coil pickups and a hex pickup for use with a guitar synth. At the time I was playing a Roland GR-20 at a coffee house gig. I quickly replaced the stock pickups with a Tonerider Pure Vintage set. Those are very nice vintage sounding pickups. They stayed in there for 16 years.

🔊 #NowPlaying on fip
This Mortal Coil:
🎵 Kangaroo
#ThisMortalCoil
https://open.spotify.com/track/2HsOICaAi5bwnqyG7uO1Fo
https://hungryclouddarkening.bandcamp.com/track/kangaroo-this-mortal-coil-big-star

Got legal and medical advice this week which confirmed that C and I have the all clear to start trying for a baby. We each have 2 at present and a dog, and we’re up for the challenge. She’s having the coil out in just over a week.

Inside the front cover of 'The Transmitting licence' from June 1946; setting out the rules now that things were just starting up again after the end of WW2.
(Scanned on my old scanner)
#hamradio

Build Your Own Class-E Musical Tesla Coil
https://poliverso.org/display/0477a01e-a6c63dae-c99afb97dc2ab1f7
Build Your Own Class-E Musical Tesla Coil We’ve all seen a million videos online with singing Tesla coils doing their thang. [Zach Armstrong] …

Currently having 'Coil therapy' which just consists of me listening to Coil as loudly as possible

I went on a bicycle ride to the beach. Collected 11 disposable Ecigarettes that were laying by the roads.
Took a larger one apart and found it had a 400ma lithium pouch battery. No charging circuit and no battery protection circuit either. The wiring goes from the battery to the heating coil via a switch. Wonder how this is allowed to be sold?
I might find a use for the battery since it passed testing so I'll keep it for now.
The rest are going to be dropped off at S…

Complex Velocity Structure of Nebular Gas in Active Galaxies Centred in Cooling X-ray Atmospheres
Marie-Jo\"elle Gingras, Alison L. Coil, B. R. McNamara, Serena Perrotta, Fabrizio Brighenti, H. R. Russell, S. Peng Oh
https://arxiv.org/abs/2404.02212

Complex Velocity Structure of Nebular Gas in Active Galaxies Centred in Cooling X-ray Atmospheres
[OII] emission maps obtained with the Keck Cosmic Web Imager (KCWI) are presented for four galaxies lying at the centers of cooling X-ray cluster atmospheres. Nebular emission reaching altitudes of tens of kpc is found in systems covering a broad range of atmospheric cooling rates, cluster masses, and dynamical states. The central galaxy in Abell 262 hosts high angular momentum gas in a kpc-scale disk. The nebular gas in RXJ0820.9+0752 is offset and redshifted with respect to the central galaxy…

Tweet: Here's how retrotransposons do their thing by jumping. It's complicated; let me know if there are major errors
Me: It seems unlikely to me that RT would jump that distance and still work well
Reply (3rd party): It doesn't, actually; it's only shown that way to make it easier to understand
Me: I mentioned it because I have trouble understanding
3rd party reply: Your mind's the problem, not the image or the text explanation.
* sigh *

David Eccles 🌻🇵🇸5x🩹🛡️🩹 (@gringene_bio) on X
@thomaswicker314 It seems unlikely to me that RT would jump that distance and still work well, especially with multiple jumps. Given that it's an LTR, doesn't it make more sense that the repeats would coil up, and the "jump" ends up being more of a side shuffle?

A really detailed superconducting magnet paper; all about the physical build, of a huge one for fusion use; 270km of REBCO tape, and weighing 10 Tonnes; some bits are fascinating, like the flood filling of the tape with solder.
https://ieeexplore.ieee.org/document/10411128

Design, Fabrication, and Assembly of the SPARC Toroidal Field Model Coil
The SPARC Toroidal Field Model Coil (TFMC) is the first large-scale (∼3 m), high-field (∼20 T) superconducting fusion magnet based on Rare Earth Yttrium Barium Copper Oxide (REBCO). Weighing 10,058 kg and utilizing 270 km of REBCO, the TFMC is a non-insulated, stack-in-plate style superconducting magnet. It has three main components: (1) the winding pack; (2) the structural case; and (3) the case extensions, or plena. The winding pack is composed of sixteen single pancakes with two terminat…

The spring equinox is here. Equal parts light and darkness. So why not some scary music from Coil!
https://www.youtube.com/watch?v=IjFOruZf61Y

Numerical simulation of individual coil placement - A proof-of-concept study for the prediction of recurrence after aneurysm coiling
Julian Schwarting, Fabian Holzberger, Markus Muhr, Martin Renz, Tobias Boeckh-Behrens, Barbara Wohlmuth, Jan Kirschke
https://arxiv.org/abs/2403.06889

Numerical simulation of individual coil placement - A proof-of-concept study for the prediction of recurrence after aneurysm coiling
Rupture of intracranial aneurysms results in severe subarachnoidal hemorrhage, which is associated with high morbidity and mortality. Neurointerventional occlusion of the aneurysm through coiling has evolved to a therapeutical standard. The choice of the specific coil has an important influence on secondary regrowth requiring retreatment. Aneurysm occlusion was simulated either through virtual implantation of a preshaped 3D coil or with a porous media approach. In this study, we used a recently…

Better late than never… #CDFriday with #Cranioclast, a duo from Hagen, Germany. Their music ranges from Surrealistic soundscapes to ritual ambient.

Deep-learning-based Magnetic Resonance Simultaneous Multislice Imaging Using Holographic Image Decoding
Satoshi Ito, Yuki Sato, Naoya Endo, Shohei Ouchi
https://arxiv.org/abs/2403.00220

Deep-learning-based Magnetic Resonance Simultaneous Multislice Imaging Using Holographic Image Decoding
Simultaneous multislice (SMS) imaging is a one of the acceleration technique of magnetic resonance imaging. SMS requires accurate sensitivity distributions in the slice plane for each receiving coil. This requirement is difficult to satisfy in practice, limiting the applications of this imaging technique. Here, images are reconstructed by applying deep learning and amplitude modulation to each slice image. Simulation experiments show that image reconstruction can be achieved for both real- and …

A really detailed superconducting magnet paper; all about the physical build, of a huge one for fusion use; 270km of REBCO tape, and weighing 10 Tonnes; some bits are fascinating, like the flood filling of the tape with solder.
https://ieeexplore.ieee.org/document/10411128

Design, Fabrication, and Assembly of the SPARC Toroidal Field Model Coil
The SPARC Toroidal Field Model Coil (TFMC) is the first large-scale (∼3 m), high-field (∼20 T) superconducting fusion magnet based on Rare Earth Yttrium Barium Copper Oxide (REBCO). Weighing 10,058 kg and utilizing 270 km of REBCO, the TFMC is a non-insulated, stack-in-plate style superconducting magnet. It has three main components: (1) the winding pack; (2) the structural case; and (3) the case extensions, or plena. The winding pack is composed of sixteen single pancakes with two terminat…

MOCCA: A Fast Algorithm for Parallel MRI Reconstruction Using Model Based Coil Calibration
Gerlind Plonka, Yannick Riebe
https://arxiv.org/abs/2403.12611 h…

MOCCA: A Fast Algorithm for Parallel MRI Reconstruction Using Model Based Coil Calibration
We propose a new fast algorithm for simultaneous recovery of the coil sensitivities and the magnetization image from incomplete Fourier measurements in parallel MRI. Our approach is based on suitable parameter models for both, the magnetization image and the sensitivities. The derived MOCCA algorithm provides perfect reconstruction results if the model assumptions are satisfied. Moreover, it has low computational complexity and achieves very good performance for incomplete MRI data. We present …

This https://arxiv.org/abs/2309.04915 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Exact oscillations and chaos on a non-Abelian coil
We construct new exact solutions of the Georgi-Glashow model in $3+1$ dimensions. These configurations are periodic in time but lead to a stationary energy density and no energy flux. Nevertheless, they possess a characteristic frequency which manifests itself through non-trivial resonances on test fields. This allows us to interpret them as non-Abelian self sustained coils. We show that for larger energies a transition to chaotic behavior takes place, which we characterize by Poincaré section…

Sometimes YouTube does you right. Reminded me of this song from the 'Born Again Pagans' EP Coil did in 1995, when they felt they were communicating with a spiritual entity named ELpH as they made it. Wild, huh?
GREAT song, too - the whole EP is killer. Hearing this right after it came out when I was in my mid teens was wiiiild
https://

This https://arxiv.org/abs/2306.11679 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_ees…

A primal-dual data-driven method for computational optical imaging with a photonic lantern
Optical fibres aim to image in-vivo biological processes. In this context, high spatial resolution and stability to fibre movements are key to enable decision-making processes (e.g., for microendoscopy). Recently, a single-pixel imaging technique based on a multicore fibre photonic lantern has been designed, named computational optical imaging using a lantern (COIL). A proximal algorithm based on a sparsity prior, dubbed SARA-COIL, has been further proposed to solve the associated inverse probl…

Current potential patches
Todd Elder, Allen H Boozer
https://arxiv.org/abs/2402.17634 https://arxiv.org/pdf/2402.17634

Current potential patches
A novel form of the current potential, a mathematical tool for the design of stellarators and stellarator coils, is developed. Specifically, these are current potentials with a finite-element-like basis, called \textit{current potential patches}. Current potential patches leverage the relationship between distributions of magnetic dipoles and current potentials to explore limits of the access properties of stellarator coil sets. An example calculation is shown using the Helically Symmetric Expe…

Numerical simulation of individual coil placement - A proof-of-concept study for the prediction of recurrence after aneurysm coiling
Julian Schwarting, Fabian Holzberger, Markus Muhr, Martin Renz, Tobias Boeckh-Behrens, Barbara Wohlmuth, Jan Kirschke
https://arxiv.org/abs/2403.06889

Numerical simulation of individual coil placement - A proof-of-concept study for the prediction of recurrence after aneurysm coiling
Rupture of intracranial aneurysms results in severe subarachnoidal hemorrhage, which is associated with high morbidity and mortality. Neurointerventional occlusion of the aneurysm through coiling has evolved to a therapeutical standard. The choice of the specific coil has an important influence on secondary regrowth requiring retreatment. Aneurysm occlusion was simulated either through virtual implantation of a preshaped 3D coil or with a porous media approach. In this study, we used a recently…

This https://arxiv.org/abs/2401.10374 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Printed Circuit Board Based Rotating Coils for Measuring Sextupole Magnets
The use of Printed Circuit Boards (PCBs) for the inductive pick-up windings of rotating coil probes has made the construction of these precision magnetic measurement devices much more accessible. This paper discusses the design details for PCBs which on each layer of the board provide for simultaneous analog bucking (suppression) of dipole, quadrupole, and sextupole field components so as to more accurately measure the higher order harmonic fields in sextupole magnets. Techniques to generate de…

Sometimes I run across something I'm not even sure what it is, but I like it. MOONBLADDER is one such thing. Released just a few days ago, this strange, wonderful over 22 minute track (an EP, I guess?) has some of the coolest ambient, avant garde, (harsh-ish) noise, experimental type stuff I've ever heard. For fans of Coil, etc.
There's some wild stuff on Crucial Blast Records, man

MOCCA: A Fast Algorithm for Parallel MRI Reconstruction Using Model Based Coil Calibration
Gerlind Plonka, Yannick Riebe
https://arxiv.org/abs/2403.12611 h…

MOCCA: A Fast Algorithm for Parallel MRI Reconstruction Using Model Based Coil Calibration
We propose a new fast algorithm for simultaneous recovery of the coil sensitivities and the magnetization image from incomplete Fourier measurements in parallel MRI. Our approach is based on suitable parameter models for both, the magnetization image and the sensitivities. The derived MOCCA algorithm provides perfect reconstruction results if the model assumptions are satisfied. Moreover, it has low computational complexity and achieves very good performance for incomplete MRI data. We present …

An Analysis on Matching Mechanisms and Token Pruning for Late-interaction Models
Qi Liu, Gang Guo, Jiaxin Mao, Zhicheng Dou, Ji-Rong Wen, Hao Jiang, Xinyu Zhang, Zhao Cao
https://arxiv.org/abs/2403.13291

An Analysis on Matching Mechanisms and Token Pruning for Late-interaction Models
With the development of pre-trained language models, the dense retrieval models have become promising alternatives to the traditional retrieval models that rely on exact match and sparse bag-of-words representations. Different from most dense retrieval models using a bi-encoder to encode each query or document into a dense vector, the recently proposed late-interaction multi-vector models (i.e., ColBERT and COIL) achieve state-of-the-art retrieval effectiveness by using all token embeddings to …

Optimisation of design parameters to improve performance of a planar electromagnetic actuator
K. S. Vikrant, D. Dadkhah, S. O. Reza Moheimani
https://arxiv.org/abs/2402.13436

Optimisation of design parameters to improve performance of a planar electromagnetic actuator
Planar electromagnetic actuators based on the principle of linear motors are widely employed for micro and nano positioning applications. These actuators usually employ a planar magnetic platform driven by a co-planar electromagnetic coil. While these actuators offer a large motion range and high positioning resolution, their actuation bandwidth is limited due to relatively small electromagnetic stiffness. We report optimization of the design parameters of the electromagnetic coil and the magne…

This https://arxiv.org/abs/2312.15245 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_ees…

Resonant Inductive Coupling Network for Human-Sized Magnetic Particle Imaging
In Magnetic Particle Imaging, a field-free region is maneuvered throughout the field of view using a time-varying magnetic field known as the drive-field. Human-sized systems operate the drive-field in the kHz range and generate it by utilizing strong currents that can rise to the kA range within a coil called the drive field generator. Matching and tuning between a power amplifier, a band-pass filter and the drive-field generator is required. Here, for reasons of safety in future human scanner…

Sometimes I run across something I'm not even sure what it is, but I like it. MOONBLADDER is one such thing. Released just a few days ago, this strange, wonderful over 22 minute track (an EP, I guess?) has some of the coolest ambient, avant garde, (harsh-ish) noise, experimental type stuff I've ever heard. For fans of Coil, etc.
There's some wild stuff on Crucial Blast Records, man

Reconstruction of Polarization Properties of Whistler Waves From Two Magnetic and Two Electric Field Components: Application to Parker Solar Probe Measurements
L. Colomban, O. V. Agapitov, V. Krasnoselskikh, M. Kretzschmar, T. Dudok de Wit, S. Karbashewski, F. S. Mozer, J. W. Bonnell, S. Bale, D. Malaspina, N. E. Raouafi
https://

Reconstruction of Polarization Properties of Whistler Waves From Two Magnetic and Two Electric Field Components: Application to Parker Solar Probe Measurements
The search-coil magnetometer (SCM) aboard Parker Solar Probe (PSP) measures the 3 Hz to 1 MHz magnetic field fluctuations. During Encounter 1, the SCM operated as expected; however, in March 2019, technical issues limited subsequent encounters to two components for frequencies below 1 kHz. Detrimentally, most whistler waves are observed in the affected frequency band where established techniques cannot extract the wave polarization properties under these conditions. Fortunately, the Electric Fi…

Emulation Techniques for Scenario and Classical Control Design of Tokamak Plasmas
A. Agnello, N. C. Amorisco, A. Keats, G. K. Holt, J. Buchanan, S. Pamela, C. Vincent, G. McArdle
https://arxiv.org/abs/2403.18912

Emulation Techniques for Scenario and Classical Control Design of Tokamak Plasmas
The optimisation of scenarios and design of real-time-control in tokamaks, especially for machines still in design phase, requires a comprehensive exploration of solutions to the Grad-Shafranov (GS) equation over a high-dimensional space of plasma and coil parameters. Emulators can bypass the numerical issues in the GS equation, if a large enough library of equilibria is available. We train an ensemble of neural networks to emulate the typical shape-control targets (separatrix at midplane, X-po…

Holistic numerical simulation of a quenching process on a real-size multifilamentary superconducting coil
Cun Xue, Han-Xi Ren, Peng Jia, Qing-Yu Wang, Wei Liu, Xian-Jin Ou, Liang-Ting Sun, Alejandro V Silhanek
https://arxiv.org/abs/2403.07666

Holistic numerical simulation of a quenching process on a real-size multifilamentary superconducting coil
Superconductors play a crucial role in the advancement of high-field electromagnets. Unfortunately, their performance can be compromised by thermomagnetic instabilities, wherein the interplay of rapid magnetic and slow heat diffusion can result in catastrophic flux jumps eventually leading to irreversible damage. This issue has long plagued high-$J_c$ Nb$_3$Sn wires at the core of high-field magnets. In this study, we introduce a groundbreaking large-scale GPU-optimized algorithm aimed at tackl…

Got a killer #MusicWomenWednesday for this week. When I was a kid in the 90s, I had this awesome Wax Trax video compilation (on VHS!) from 1994, it had KMFDM, Coil and Laibach on it (and a ton of other great bands) including BRAINDEAD SOUNDMACHINE.
This was the first way I ever heard this great Patsy Cline song, this unforgettable 'metaldisco' (as they liked their genre to be call…

A mechanical analogue of Faraday's law for waves in chiral elastic media
Finn J. P. Allison, Ozgur Selsil, Stewart G. Haslinger, Alexander B. Movchan
https://arxiv.org/abs/2402.12853

A mechanical analogue of Faraday's law for waves in chiral elastic media
Faraday's law on electromagnetic induction, one of the most fundamental laws of nature, indicates that a change of magnetic field through a coil wire induces a current in the wire. Electromagnetic induction has many paramount technological applications today, and provides the link between electric and magnetic fields, which is crucial to explain the existence of electromagnetic waves. In our quest to replicate Faraday's law for mechanical systems, we design an infinite mass-spring "helix-like s…

SNAKE-fMRI: A modular fMRI data simulator from the space-time domain to k-space and back
Pierre-Antoine Comby (MIND, BAOBAB), Alexandre Vignaud (BAOBAB), Philippe Ciuciu (MIND)
https://arxiv.org/abs/2404.08282

SNAKE-fMRI: A modular fMRI data simulator from the space-time domain to k-space and back
We propose a new, modular, open-source, Python-based 3D+time fMRI data simulation software, \emph{SNAKE-fMRI}, which stands for \emph{S}imulator from \emph{N}eurovascular coupling to \emph{A}cquisition of \emph{K}-space data for \emph{E}xploration of fMRI acquisition techniques.Unlike existing tools, the goal here is to simulate the complete chain of fMRI data acquisition, from the spatio-temporal design of evoked brain responses to various multi-coil k-space data 3D sampling strategies, with t…

Holistic numerical simulation of a quenching process on a real-size multifilamentary superconducting coil
Cun Xue, Han-Xi Ren, Peng Jia, Qing-Yu Wang, Wei Liu, Xian-Jin Ou, Liang-Ting Sun, Alejandro V Silhanek
https://arxiv.org/abs/2403.07666

Holistic numerical simulation of a quenching process on a real-size multifilamentary superconducting coil
Superconductors play a crucial role in the advancement of high-field electromagnets. Unfortunately, their performance can be compromised by thermomagnetic instabilities, wherein the interplay of rapid magnetic and slow heat diffusion can result in catastrophic flux jumps eventually leading to irreversible damage. This issue has long plagued high-$J_c$ Nb$_3$Sn wires at the core of high-field magnets. In this study, we introduce a groundbreaking large-scale GPU-optimized algorithm aimed at tackl…

SNAKE-fMRI: A modular fMRI data simulator from the space-time domain to k-space and back
Pierre-Antoine Comby (MIND, BAOBAB), Alexandre Vignaud (BAOBAB), Philippe Ciuciu (MIND)
https://arxiv.org/abs/2404.08282

SNAKE-fMRI: A modular fMRI data simulator from the space-time domain to k-space and back
We propose a new, modular, open-source, Python-based 3D+time fMRI data simulation software, \emph{SNAKE-fMRI}, which stands for \emph{S}imulator from \emph{N}eurovascular coupling to \emph{A}cquisition of \emph{K}-space data for \emph{E}xploration of fMRI acquisition techniques.Unlike existing tools, the goal here is to simulate the complete chain of fMRI data acquisition, from the spatio-temporal design of evoked brain responses to various multi-coil k-space data 3D sampling strategies, with t…

The MOSDEF Survey: Properties of Warm Ionised Outflows at $z=$ 1.4-3.8
Andrew Weldon (University of California, Riverside), Naveen A. Reddy (University of California, Riverside), Alison L. Coil (University of California, San Diego), Alice E. Shapley (University of California, Los Angeles), Brian Siana (University of California, Riverside), Mariska Kriek (Leiden University), Bahram Mobasher (University of California, Riverside), Zhiyuan Song (University of California, Riverside), Michae…

The MOSDEF Survey: Properties of Warm Ionised Outflows at $z=$ 1.4-3.8
We use the large spectroscopic data set of the MOSFIRE Deep Evolution Field survey to investigate the kinematics and energetics of ionised gas outflows. Using a sample of 598 star-forming galaxies at redshift 1.4 < $z$ < 3.8, we decompose $\rm{H}α$ and [OIII] emission lines into narrow and broad components, finding significant detections of broad components in 10% of the sample. The ionised outflow velocity from individual galaxies appears independent of galaxy properties, such as stellar mass…

Flat-top plasma operational space of the STEP power plant
E. Tholerus (CCFE, Culham Science Centre, Abingdon, Oxon, UK), F. J. Casson (CCFE, Culham Science Centre, Abingdon, Oxon, UK), S. P. Marsden (CCFE, Culham Science Centre, Abingdon, Oxon, UK), T. Wilson (CCFE, Culham Science Centre, Abingdon, Oxon, UK), D. Brunetti (CCFE, Culham Science Centre, Abingdon, Oxon, UK), P. Fox (CCFE, Culham Science Centre, Abingdon, Oxon, UK), S. J. Freethy (CCFE, Culham Science Centre, Abingdon, Oxon…

Flat-top plasma operational space of the STEP power plant
STEP is a spherical tokamak prototype power plant that is being designed to demonstrate net electric power. The design phase involves the exploitation of plasma models to optimise fusion performance subject to satisfying various physics and engineering constraints. A modelling workflow, including integrated core plasma modelling, MHD stability analysis, SOL and pedestal modelling, coil set and free boundary equilibrium solvers, and whole plant design, has been developed to specify the design pa…

Self Supervised Learning for Improved Calibrationless Radial MRI with NLINV-Net
Moritz Blumenthal, Chiara Fantinato, Christina Unterberg-Buchwald, Markus Haltmeier, Xiaoqing Wang, Martin Uecker
https://arxiv.org/abs/2402.06550

Self Supervised Learning for Improved Calibrationless Radial MRI with NLINV-Net
Purpose: To develop a neural network architecture for improved calibrationless reconstruction of radial data when no ground truth is available for training. Methods: NLINV-Net is a model-based neural network architecture that directly estimates images and coil sensitivities from (radial) k-space data via non-linear inversion (NLINV). Combined with a training strategy using self-supervision via data undersampling (SSDU), it can be used for imaging problems where no ground truth reconstructions a…

The impact of AGN X-ray selection on the AGN halo occupation distribution
M. C. Powell, M. Krumpe, A. Coil, T. Miyaji
https://arxiv.org/abs/2403.03978 http…

The impact of AGN X-ray selection on the AGN halo occupation distribution
The connection between active galactic nuclei (AGN) and their host dark matter halos provides powerful insights into how supermassive black holes (SMBHs) grow and coevolve with their host galaxies. Here we investigate the impact of observational AGN selection on the AGN halo occupation distribution (HOD) by forward-modeling AGN activity into cosmological N-body simulations. By assuming straightforward relationships between the SMBH mass, galaxy mass, and (sub)halo mass, as well as a uniform bro…