Tootfinder

Sind #Bienenwachstücher eine umweltfreundliche Alternative zur #Frischhaltefolie? Einerseits sind sie wiederverwendbar und biologisch abbaubar, andererseits gibt es einige Nachteile. Ich war vor einigen Jahren kurz davor, mir welche zu kaufen, habe dann aber verzichtet. Warum…

Frischhaltefolie ersetzen: Sind Bienenwachstücher eine umweltfreundliche Alternative?
Bienenwachstücher gelten als Alternative zu Frischhaltefolien. Ein genauerer Blick auf das Produkt.

Basis pursuit by inconsistent alternating projections
Roger Behling, Yunier Bello-Cruz, Luiz-Rafael Santos, Paulo J. S. Silva
https://arxiv.org/abs/2508.15026 https://

Basis pursuit by inconsistent alternating projections
Basis pursuit is the problem of finding a vector with smallest $\ell_1$-norm among the solutions of a given linear system of equations. It is a famous convex relaxation of what the literature refers to as sparse affine feasibility problem, in which sparse solutions to underdetermined systems are sought. In addition to enjoying convexity, the basis pursuit can be trivially rewritten as a linear program, and thus standard tools in linear programming apply for solving it. In turn, we tackle the …

PET Image Reconstruction Using Deep Diffusion Image Prior
Fumio Hashimoto, Kuang Gong
https://arxiv.org/abs/2507.15078 https://arxiv.…

PET Image Reconstruction Using Deep Diffusion Image Prior
Diffusion models have shown great promise in medical image denoising and reconstruction, but their application to Positron Emission Tomography (PET) imaging remains limited by tracer-specific contrast variability and high computational demands. In this work, we proposed an anatomical prior-guided PET image reconstruction method based on diffusion models, inspired by the deep diffusion image prior (DDIP) framework. The proposed method alternated between diffusion sampling and model fine-tuning g…

Smooth binary evolution from wide resonances in boson clouds
Giovanni Maria Tomaselli
https://arxiv.org/abs/2507.15110 https://arxiv.…

Smooth binary evolution from wide resonances in boson clouds
Ultralight scalars can form superradiant clouds around rotating black holes. These may alter the dynamics of compact binaries and the ensuing waveform through orbital resonances and cloud ionization. We re-examine resonances involving states with nonzero decay width, deriving an effective treatment for resonances that are wider than the binary's frequency chirp. We demonstrate the utility of this approach by calculating an upper bound for the cloud's mass surviving up to the latest stages of th…

Die ePetition 185051 an den Bundestag aus dem Bereich Grundsicherung mit dem Titel
Anpassung des Freibetrags bei Einkommen neben Grundsicherung im Alter und bei Erwerbsminderung
kann bis zum Donnerstag 02. Oktober 2025 01:00 UTC mitgezeichnet werden und lautet
Mit der Petition wird gefordert, zu…

Die ePetition 185051 an den Bundestag aus dem Bereich Grundsicherung mit dem Titel
Anpassung des Freibetrags bei Einkommen neben Grundsicherung im Alter und bei Erwerbsminderung
kann bis zum Donnerstag 02. Oktober 2025 01:00 UTC mitgezeichnet werden und lautet
Mit der Petition wird gefordert, zu…

Observational constraints on phenomenological emergent dark energy and barotropic dark matter characterized by a constant equation of state parameter
Jian-Qi Liu, Yan-Hong Yao, Yan Su, Jia-Wei Wu
https://arxiv.org/abs/2507.16147

Observational constraints on phenomenological emergent dark energy and barotropic dark matter characterized by a constant equation of state parameter
While cold dark matter is widely supported by a range of cosmological observations, it encounters several difficulties at smaller scales. These issues have prompted the investigation of various alternative dark matter candidates, leaving the question "What is dark matter?" still open. In this work, we propose a new cosmological model that considers dark matter as a barotropic fluid with a constant equation of state parameter and interprets dark energy as the phenomenological emergent dark energ…

A Study of Hybrid and Evolutionary Metaheuristics for Single Hidden Layer Feedforward Neural Network Architecture
Gautam Siddharth Kashyap, Md Tabrez Nafis, Samar Wazir
https://arxiv.org/abs/2506.15737

A Study of Hybrid and Evolutionary Metaheuristics for Single Hidden Layer Feedforward Neural Network Architecture
Training Artificial Neural Networks (ANNs) with Stochastic Gradient Descent (SGD) frequently encounters difficulties, including substantial computing expense and the risk of converging to local optima, attributable to its dependence on partial weight gradients. Therefore, this work investigates Particle Swarm Optimization (PSO) and Genetic Algorithms (GAs) - two population-based Metaheuristic Optimizers (MHOs) - as alternatives to SGD to mitigate these constraints. A hybrid PSO-SGD strategy is …

Hierarchical constraints on gravitational waves from horizonless compact objects
Rajrupa Mondal, Julian Westerweck, Yotam Sherf, Collin D. Capano
https://arxiv.org/abs/2506.17215 …

Hierarchical constraints on gravitational waves from horizonless compact objects
We use the data of several promising gravitational wave observations to obtain increasingly stringent bounds on near-horizon deviations of their sources from the Kerr geometry. A range of horizonless compact objects proposed as alternatives to black holes of general relativity would possess a modified gravitational wave emission after the merger. Modelling these objects by introducing reflection of gravitational waves near the horizon, we can measure deviations from Kerr in terms of a single ad…