Mastodawn

Registration is open for the #KMPB summer schoool in theoretical #physics and #mathematics in #Berlin on 31 August to 4 September: Symbols, Periods, and #Resurgence . These are important themes in modern #quantumFieldTheory and mathematical physics. The event itself is free of charge, there is even limited financial support available for accommodation or travel cost.
https://indico.global/event/17166/

KMPB School 2026: Symbols and Periods

The KMPB School 2026: Symbols and Periods is a one-week program in which we will explore mathematical methods for perturbative and non-perturbative computations of amplitudes. The school is organised by PhD students at Humboldt-Universität zu Berlin with the support of the KMPB (Kolleg Mathematik Physik Berlin), an interdisciplinary centre at HU whose community of research groups shares a mutual interest in mathematics and physics. In the spirit of the KMPB, the school aims at generating...

Indico Global (Indico)

Vincent COUILLARD 3d ago

L’ŒIL BLEU
Il y a, quelques dizaines de mètres en amont de cette scène, la résurgence de la rivière Bistricë, en Albanie. Ce point, où l'eau jaillit d’une profondeur de 50 mètres, s'appelle « l’œil bleu », à cause de sa forme circulaire et des micro-algues d’un bleu-vert éclatant qui le font ressembler à l’iris d’un œil.

Lire la suite sur mon Blog : https://blogimages.fr/loeil-bleu/photos/

#Albanie #Muzinë #Résurgence #Rivière #Bleu

Vincent Couillard 3d ago

Lire la suite sur mon Blog : https://blogimages.fr/loeil-bleu/photos/

#Albanie #Muzinë #Résurgence #Rivière #Bleu

Paul Balduf Jun 3

#paperOfTheDay is "On the Numerical calculation of a class of definite integrals and infinite series" by G. Stokes from 1850.
This article is a follow up on the work of Airy I mentioned a few days ago, where the Airy function was introduced through its convergent integral representation. This function gives the intensity in interference patterns of light (e.g. the location of "higher order" rainbows). In #physics experiments, what one actually measures is the location of maxima or minima of intensity, which would correspond to the zeros of the Airy function. With the technology of 1850 it was hard to numerically compute integrals. Airy derived a convergent Taylor series expansion about zero, but from that, it is still hard to find higher order zeros.
The present paper introduces a new approach to such calculations. The idea is to first derive a differential equation for the Airy function, and then use it to obtain a series expansion around infinity. This expansion is divergent (which is clear since the Airy function qualitatively changes character around zero), but it gives very high numerical accuracy for not-too-small arguments. In particular, one can obtain the locations of all zeros.
The plot shows the true Airy function in black, and the first 9 terms of its convergent power series expansion around zero in red. We see that they reproduce the first zero, but completely miss all other zeros. The green curve is the first (!) term of the divergent expansion around -infinity. It is visually indistinguishable from the true function for all zeros. This high numerical accuracy of divergent series expansions is a typical feature seen in #resurgence computations.
#mathematics

https://www.cambridge.org/core/books/abs/mathematical-and-physical-papers/on-the-numerical-calculation-of-a-class-of-definite-integrals-and-infinite-series/1DA9818868338CC0E684A6CB63B2503D

Paul Balduf May 30

The #paperOfTheDay is "On the intensity of light in the neighbourhood of a caustic" by George Biddell Airy, 1838.
This is a paper from the time long before anything quantum or relativity, where elementary questions of #optics were at the forefront of theoretical #physics . Since light has the character of both a wave and a ray, it is important not only where a ray can point, but also "how long" it is; one will find destructive or constructive interference depending on the difference of path length (in relation to the wave length). In the framework of geometric (=light ray) optics, this amounts to the fact that when light is reflected, a small change of the point of reflection does not change the total length of the path travelled to first order (i.e. light is reflected at such angle that the path length is stationary).
For a point of focus, this relation is true not only infinitesimally, but for the full reflecting surface: All incoming rays sent to a focal point have the same length. Airy studies the intermediate case: Not ALL rays have the same length, but still, the difference vanishes to higher than first order locally. Geometrically, this gives rise to a "caustic", basically a focal point deformed to a focal line. The existence of such line amounts to the reflecting surface satisfying a certain differential equation. Most notably, for the total intensity (in the easiest case), Airy finds the expression
integral from z=0 to z=infinity of cos(z^3 + t*z) dz , where t is a parameter. This function Ai(t) is nowadays known as the Airy function, and it constitutes the basic example of many effects in the theory of #resurgence and special functions in #mathematics .
https://www.semanticscholar.org/paper/ON-the-Intensity-of-Light-in-the-neighbourhood-of-a-Airy/8d6349998be20279220e8a3e033de1679a58a916

Steam & Epic Games | Daily May 5

⚡️The Division Resurgence, the free looter‑shooter is getting a full PC release in August: Ubisoft published the 2026 roadmap. The launch will kick off Season 2; seasons run ~4 months with major content waves every 6 weeks.

Next update goes live 12 May with Dark Zone events and cosmetics; a June pass brings the exotic shotgun Scorpio. A big story expansion is slated for winter. PC is already in Early Access with shared progress and...

#SteamAndEpic #FREE #Resurgence #Division #Ubisoft #Scorpio

Steam & Epic Games | Daily May 2

🤨 The SURPRISE: The Division Resurgence quietly landed on PC, Ubisoft's bid to patch weak mobile earnings.

In the first month after the March 31 launch the mobile game made only $1.69M from 3.43M downloads; revenue slipped from week two. Ubisoft pushed an unannounced PC release to chase players, if numbers don't recover, the shooter could follow other Ubisoft titles into shutdown.

#SteamAndEpic #Ubisoft #Resurgence #Ubisofts #SURPRISE #Division

Steam & Epic Games | Daily Apr 29

🎮 SURPRISE, The Division Resurgence has quietly landed on PC: a native client is live on Ubisoft Connect, the free shooter that was previously mobile‑only on iOS/Android.

It drops you back into a snowbound New York during the first outbreak; gameplay still leans on cover‑based tactical gunfights, squad cooperation and operator gadgets, squad up and give it a spin.

#SteamAndEpic #Resurgence #SURPRISE #Division #Ubisoft #Connect

Hacker News Apr 27

The Quiet Resurgence of RF Engineering

https://atempleton.bearblog.dev/quiet-resurgence-of-rf-engineering/

#HackerNews #RFengineering #Resurgence #Technology #Innovation #Engineering #Community

The Quiet Resurgence of RF Engineering

I've worked in the aerospace industry for the past 8 years, and for most of that time I felt like I could confidently say that RF engineering felt like it wa...

Anthony's Blog

Claudius Apr 16

So, #StarTrek #Resurgence is gone from #Steam. It is still on Epic Games: https://store.epicgames.com/de/p/star-trek-resurgence

If you had any intention of buying it, this might be the last chance. I do not believe it will stay on Epic much longer. It's 23 bucks. Personally, I think that's a fair price. A single playthrough is roughly ten hours. This being a choose-your-own-adventure, you can at least play it twice in my opinion. If you're a TNG-VOY era trek fan, this game may be for you.

Star Trek: Resurgence | Heute herunterladen und kaufen – Epic Games Store

Lade dir Star Trek: Resurgence im Epic Games Store herunter und spiele es. Schaue nach, für welche Plattform es verfügbar ist und was es kostet!

Epic Games Store