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Welcome to Berlin Buzzwords 2025! 
Be sure not to miss our keynote speaker, @…, who will be giving a talk on „Unpacking Digital Sovereignty: How to avoid fueling the nationalist rise," which commences at 9:35 am at stage Kesselhaus.
 
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Unpacking Digital Sovereignty: How to avoid fueling the nationalist rise
With the new ruling coalition of Trump, Musk and Big Tech, European digital sovereignty seems to be the widely accepted solution to break free from US companies that are used to threaten European governments. The EU is reviving industrial policy and is willing to invest a lot of money into digital sovereignty - but which problems exactly should it address, and what should be part of the solution? This talk shows that digital sovereignty is prone to open the door to a nationalist agenda which fa…

Maya-Tupi graphs: a generalization of split graphs
J\'ulio Ara\'ujo, C\'esar Hern\'andez-Cruz, Cl\'audia Linhares
https://arxiv.org/abs/2508.13424 https://…

Maya-Tupi graphs: a generalization of split graphs
We define the family of Maya-Tupi graphs as those graphs that admit a partition $(A,B)$ of their vertex sets such that $A$ induces a complete multipartite graph where each part has size at most two, and $B$ induces a graph where every connected component is $K_1$ or $K_2$. The family of Maya-Tupi graphs is self complementary, generalizes split graphs, falls into the sparse-dense partitioning schema and is characterized by finitely many forbidden induced subgraphs. Unfortunately, our computation…

Activity-Cycle Variations of Convection Scales in Subsurface Layers of the Sun
Alexander V. Getling, Alexander G. Kosovichev
https://arxiv.org/abs/2508.12465 https://

Activity-Cycle Variations of Convection Scales in Subsurface Layers of the Sun
We use subsurface-flow velocity maps inferred by time--distance helioseismology from Doppler measurements with the Helioseismic and Magnetic Imager (HMI) of the Solar Dynamics Observatory (SDO) to investigate variations of large-scale convection during Solar Cycles 24 and 25 in the 19-Mm-deep layer. The spatial power spectra of the horizontal-flow divergence reveal well-defined characteristic scales of solar supergranulation in the upper 4 Mm layer, while the giant-cell scale is prominent below…

xAI launches Grok 4 Heavy, a "multi-agent version" of Grok 4 offering increased performance, and unveils a new $300/month AI subscription plan, SuperGrok Heavy (Maxwell Zeff/TechCrunch)
https://techcrunch.com/2025/07/09/elon

Elon Musk's xAI launches Grok 4 alongside a $300 monthly subscription | TechCrunch
Elon Musk and xAI employee announced on Wednesday night the launch of the startup's next flagship AI model, Grok 4.

Läsvärt debattinlägg av Johan Schaar, som tidigare tjänstgjort vid det svenska generalkonsulatet i Jerusalem. https://www.dn.se/kultur/johan-schaar-freedom-flotilla-har-vind-i-seglen-nar-sverige-sviker/

Johan Schaar: Freedom flotilla har vind i seglen i opinionen
Israel stoppar fartyget Madleen och tvingar Gazabor att löpa gatlopp för mat. Även den svenska regeringen har gjort bistånd till ett politiskt spel, skriver Johan Schaar.

Just uploaded photos of exhibits from the #ptreyesnationalseashore to the #saveoursigns site. An easy way to safeguard #research used for

Montag: Online-Störungen bei den Sparkassen, WhatsApp-Status wird multimedial
Online-Banking fehlerhaft WhatsApp-Status mit neuen Funktionen KI-Speicherbedarf besorgt Seagate Trickbot-Bandenchef identifiziert Rekord neuer E-Autos

EmoSSLSphere: Multilingual Emotional Speech Synthesis with Spherical Vectors and Discrete Speech Tokens
Joonyong Park, Kenichi Nakamura
https://arxiv.org/abs/2508.11273 https://…

EmoSSLSphere: Multilingual Emotional Speech Synthesis with Spherical Vectors and Discrete Speech Tokens
This paper introduces EmoSSLSphere, a novel framework for multilingual emotional text-to-speech (TTS) synthesis that combines spherical emotion vectors with discrete token features derived from self-supervised learning (SSL). By encoding emotions in a continuous spherical coordinate space and leveraging SSL-based representations for semantic and acoustic modeling, EmoSSLSphere enables fine-grained emotional control, effective cross-lingual emotion transfer, and robust preservation of speaker id…

A Comparative Evaluation of Deep Learning Models for Speech Enhancement in Real-World Noisy Environments
Md Jahangir Alam Khondkar, Ajan Ahmed, Masudul Haider Imtiaz, Stephanie Schuckers
https://arxiv.org/abs/2506.15000

A Comparative Evaluation of Deep Learning Models for Speech Enhancement in Real-World Noisy Environments
Speech enhancement, particularly denoising, is vital in improving the intelligibility and quality of speech signals for real-world applications, especially in noisy environments. While prior research has introduced various deep learning models for this purpose, many struggle to balance noise suppression, perceptual quality, and speaker-specific feature preservation, leaving a critical research gap in their comparative performance evaluation. This study benchmarks three state-of-the-art models W…

Ramsey numbers for sparse graphs versus path or cycle
Chunchao Fan, Qizhong Lin
https://arxiv.org/abs/2507.11835 https://arxiv.org/pd…

Ramsey numbers for sparse graphs versus path or cycle
For any integer $k\ge3$, let $G$ be a connected graph with $n\ge Ω(k^4)$ vertices and no more than $(1+\frac{1}{ck^2})n$ edges where $c>0$ is a constant, and $P_k$ or $C_k$ a path or cycle with $k$ vertices. In this paper we prove that if $k$ is odd then $r(G,C_k)=2n-1$. Moreover, \[ r(G,P_k)=\max\left\{n+\left\lfloor\frac k2\right\rfloor-1, n+k-2-α'-γ\right\}, \] where $α'$ is the independence number of an appropriate subgraph of $G$ and $γ=0$ if $k-1$ divides $n+k-3-α'$ and $γ=1$ other…