Dynamo
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Related Articles from SNS
Optimal velocity fields for instantaneous magnetic field growth
arXiv:2508.03573v3 Announce Type: replace Abstract: We consider a variant of the kinematic dynamo problem. Rather than prescribing a velocity field and searching for high-growth magnetic fields via an eigenvalue problem, we treat the seed magnetic-field structure as given and ask which velocity field maximally enhances its instantaneous growth. We show this second problem has an elegant formulation in terms of variational calculus.
Scale-dependent force balance governs transition to the geostrophic regime in liquid metal rotating convection
arXiv:2606.04995v1 Announce Type: new Abstract: Rotating convection in low-Prandtl-number liquid metal drives dynamo action in the Earth's outer core and is central to planetary interior dynamics. It has been proposed that flow regime transitions in rotating convection are controlled by competition between the thermal and Ekman boundary layers. However, through laboratory experiments and direct numerical simulations of rotating liquid-metal convection, we find that this mechanism breaks down...
Nestory Irankunda the face of changing Socceroos at World Cup
Nestory Irankunda the face of the Socceroos at FIFA World Cup 2026 Mon 8 Jun 2026 at 2:56pm Nestory Irankunda still cannot believe the new face of Australian football is a young black man. The 20-year-old is one of the hottest properties at this year's World Cup, with replicas of his number 17 shirt set to fly out the door. If Socceroos dynamo Irankunda does something special, his profile could go next level.
PgDog is funded and coming to a database near you
Our funding announcement Postgres is the only database you need. The reason DBs like Mongo or Dynamo exist is because Postgres has a scaling problem. If you could make it just work, with 100 TB+ tables and 1M queries per second, we don’t think you would use anything else.
Imprints of primordial magnetic fields in gravitational collapse during early structure formation
Announce Type: replace-cross Abstract: Context. Primordial magnetic fields (PMFs) generated in the early Universe might have left observable imprints on present-day large-scale structure. However, the spatial scales on which primordial signatures are able to survive the nonlinear processes that accompany structure formation remain unclear.
Intel's mysterious new datacenter GPU is what Nvidia's Rubin CPX nearly was
Intel offered new insights into its next-gen datacenter GPU codenamed Crescent Island. Alongside supporting enterprise AI deployments, the GPU could fill the void left by Nvidia's Rubin CPX GPUs, which were seemingly shelved late last year following its acquisition of Groq. As datacenter GPUs go, Intel's Crescent Island is certainly an odd duck.
Fail-Closed Lowering of Resident KV Claims onto LLM Serving Runtimes
arXiv:2606.01387v1 Announce Type: new Abstract: LLM serving runtimes increasingly expose KV-cache primitives that resemble future-reuse controls: retention priority, TTL-like duration, host or storage offload, block events, active no-evict scheduling, and KV-aware routing. This paper argues that such primitives are weaker than accepted future-KV obligations. A runtime can expose priority, offload, events, and routing without accepting responsibility for a future reuse claim.
Three Lions Cubs: England World Cup heroes through the years with cute childhood snaps
Three Lions Cubs: England World Cup heroes through the years with cute childhood snaps Thomas Tuchel and his England heroes are in Miami preparing to kick off their World Cup campaign, hoping to end 60 years of hurt for Three Lions fans across the country England’s stars look unrecognisable in these cute lion cub childhood photos. Thomas Tuchel and his men are in Miami preparing to kick off in the World Cup and hoping to end 60 years of hurt. Each of them will have dreamt of earning glory...
Mexico World Cup 2026 preview: Players to watch, group matches and squad
Mexico World Cup 2026 preview: Players to watch, group matches and squad El Tri lost in the last 16 in seven consecutive World Cups but have higher hopes for the 2026 tournament. Previous World Cup appearances: 17 Best performance: Quarterfinals (1970, 1986) First appearance: 1930 (Uruguay) Top goal scorers: Luis Hernandez, Javier Hernandez (4) Most appearances: Rafael Marquez (19) Player to watch: Raul Jimenez FIFA world ranking: 14 Mexicans call their inability to reach the World Cup...
Influence of Rotation on Fingering Convection in Planetary Cores
arXiv:2511.11442v2 Announce Type: replace Abstract: Stably stratified layers are thought to develop at the top of the liquid metallic cores of many terrestrial planets. We consider the case where the thermal gradient is stable but the compositional gradient is unstable, a situation particularly relevant to Mercury. The strong contrast between molecular diffusivities of temperature and composition leads to fingering convection.