Tootfinder

As CS students experiment with AI coding tools, professors say courses need to focus less on syntax and more on problem solving, design, testing, and debugging (Rina Diane Caballar/IEEE Spectrum)
https://spectrum.ieee.org/ai-coding

AI Copilots Are Changing How Coding Is Taught

Professors are shifting away from syntax and emphasizing higher-level skills

Scaling Rectified Flow Transformers for High-Resolution Image Synthesis
Patrick Esser, Sumith Kulal, Andreas Blattmann, Rahim Entezari, Jonas M\"uller, Harry Saini, Yam Levi, Dominik Lorenz, Axel Sauer, Frederic Boesel, Dustin Podell, Tim Dockhorn, Zion English, Kyle Lacey, Alex Goodwin, Yannik Marek, Robin Rombach
https://…

Scaling Rectified Flow Transformers for High-Resolution Image Synthesis
Diffusion models create data from noise by inverting the forward paths of data towards noise and have emerged as a powerful generative modeling technique for high-dimensional, perceptual data such as images and videos. Rectified flow is a recent generative model formulation that connects data and noise in a straight line. Despite its better theoretical properties and conceptual simplicity, it is not yet decisively established as standard practice. In this work, we improve existing noise samplin…

Tensor Decomposition-based Time Varying Channel Estimation for mmWave MIMO-OFDM Systems
Ruizhe Wang, Hong Ren, Cunhua Pan, Gui Zhou, Jiangzhou Wang
https://arxiv.org/abs/2403.02942

Tensor Decomposition-based Time Varying Channel Estimation for mmWave MIMO-OFDM Systems
In this paper, we consider the time-varying channel estimation in millimeter wave (mmWave) multiple-input multiple-output MIMO systems with hybrid beamforming architectures. Different from the existing contributions that considered single-carrier mmWave systems with high mobility, the wideband orthogonal frequency division multiplexing (OFDM) system is considered in this work. To solve the channel estimation problem under channel double selectivity, we propose a pilot transmission scheme based …

This https://arxiv.org/abs/2401.03968 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qbi…

scDiffusion: conditional generation of high-quality single-cell data using diffusion model
Single-cell RNA sequencing (scRNA-seq) data are important for studying the laws of life at single-cell level. However, it is still challenging to obtain enough high-quality scRNA-seq data. To mitigate the limited availability of data, generative models have been proposed to computationally generate synthetic scRNA-seq data. Nevertheless, the data generated with current models are not very realistic yet, especially when we need to generate data with controlled conditions. In the meantime, the Di…

Division properties of commuting polynomials
Kimiko Hasegawa, Rin Sugiyama
https://arxiv.org/abs/2404.01605 https://arxiv.org/pdf/240…

Division properties of commuting polynomials
Polynomials commute under composition are referred to as commuting polynomials. In this paper, we study division properties for commuting polynomials with rational (and integer) coefficients. As a consequence, we show an algebraic particularity of the commuting polynomials coming from weighted sums for cycle graphs with pendant edges (arXiv:2402.07209v1.).

On NBC's Meet the Press, veteran anchor Chuck Todd criticized NBC News' decision to hire former RNC chair Ronna McDaniel, saying she "has credibility issues" (Michael M. Grynbaum/New York Times)
https://www.nytimes.com/2024/03/24/busines

Chuck Todd Questions His Network, NBC News, Over Hiring of Former R.N.C. Chair
The extraordinary comments on “Meet the Press” revealed tensions in NBC’s news divisions over Ronna McDaniel, who recently stepped down as head of the Republican National Committee.

Diffusion limits in the quarter plane and non-semimartingale reflected Brownian motion
Rami Atar, Amarjit Budhiraja
https://arxiv.org/abs/2403.00320 https:…

Diffusion limits in the quarter plane and non-semimartingale reflected Brownian motion
We consider a continuous-time random walk in the quarter plane for which the transition intensities are constant on each of the four faces $(0,\infty)^2$, $F_1=\{0\}\times(0,\infty)$, $F_2=(0,\infty)\times\{0\}$ and $\{(0,0)\}$. We show that when rescaled diffusively it converges in law to a Brownian motion with oblique reflection direction $d^{(i)}$ on face $F_i$, $i=1,2$, defined via the Varadhan-Williams submartingale problem. A parameter denoted by $α$ was introduced in \cite{vw}, measurin…

Credibility is …credibility. ““There’s a reason why there are a lot of journalists at NBC News uncomfortable with this, because many of our professional dealings with the R.N.C. over the last six years have been met with gaslighting, have been met with character assassination.””

Chuck Todd Questions His Network, NBC News, Over Hiring of Former R.N.C. Chair
The extraordinary comments on “Meet the Press” revealed tensions in NBC’s news divisions over Ronna McDaniel, who recently stepped down as head of the Republican National Committee.

Active Sensing for Reciprocal MIMO Channels
Tao Jiang, Wei Yu
https://arxiv.org/abs/2403.00134 https://arxiv.org/pdf/2403.00134

Active Sensing for Reciprocal MIMO Channels
This paper addresses the design of transmit precoder and receive combiner matrices to support $N_{\rm s}$ independent data streams over a time-division duplex (TDD) point-to-point massive multiple-input multiple-output (MIMO) channel with either a fully digital or a hybrid structure. The optimal precoder and combiner design amounts to finding the top-$N_{\rm s}$ singular vectors of the channel matrix, but the explicit estimation of the entire high-dimensional channel would require significant p…

Frame Codes for the Block-Erasure Channel
Itamar Jacoby, Ram Zamir
https://arxiv.org/abs/2405.01172 https://arxiv.org/pdf/2405.01172<…

Frame Codes for the Block-Erasure Channel
Analog codes add redundancy by expanding the dimension using real/complex-valued operations. Frame theory provides a mathematical basis for constructing such codes, with diverse applications in non-orthogonal code-division multiple access (NOMA-CDMA), distributed computation, multiple description source coding, space-time coding (STC), and more. The channel model corresponding to these applications is a combination of noise and erasures. Recent analyses showed a useful connection between spectr…