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A model for pulsation in high-speed double cone flow
arXiv:2606.01942v1 Announce Type: new Abstract: Periodic large-scale shock-wave unsteadiness over a canonical double cone, termed in literature as "pulsation," is experimentally studied at Mach 6. The general double cone geometry is defined by three non-dimensional geometric parameters: fore- and aft-cone angles ($\theta_1$ and $\theta_2$), and ratio of the conical slant lengths ($\mathit{\Lambda}$). While existing literature on pulsation offers detailed qualitative and phenomenological...
Modern-day Brahmastra? How hypersonic missiles could change the rules of war
Operation Sindoor demonstrated how a supersonic weapon flying at a speed of nearly Mach 3 (3,700 kmph), or five times the speed of sound, is nearly impossible to stop. A missile flying at low level would be detected by a ground-based radar at a distance of 15 km and, at Mach 3, this would provide an early warning of around 15 seconds to impact. This compresses the decision cycle of an air defence commander.
Modal Analysis of Buffet Effects Induced by Ultrahigh Bypass Ratio Nacelle Installation
arXiv:2602.16443v2 Announce Type: replace Abstract: Unsteady shock-boundary-layer interaction on the lower surface of a transport-aircraft wing can be caused or amplified by ultrahigh-bypass-ratio underwing nacelle installation. This work analyzes the resulting buffet dynamics on the Airbus XRF-1 configuration at a Mach number of $0.84$, a Reynolds number of $3.3\times 10^6$, and $-4^\circ$ angle of attack using scale-resolving delayed detached eddy simulations and unsteady...
The American Missile Crisis
Recent global conflicts, from Russia and Ukraine to Iran and Israel, have seen a resurgent awareness of the frailty of US munitions stock, which has been drawn down by both direct and indirect involvement in these events. While exact stockpile volumes are not disclosed, it is estimated that supplies of US warheads and the missiles that carry them have declined by nearly an order of magnitude since their peak during the Cuban Missile Crisis. Analysts have estimated that in the event of a...
Hoka Coupon Codes: 30% Off | June 2026
Hoka running shoes have been popular with trail and mountain runners (or “skyrunners”, if you prefer) since the company’s inception in 2009. But it was only during the Covid-19 pandemic that we all threw fashion out the window and became obsessed with these insanely puffy, comfy shoes. The iconic, everyday Cliftons are the most popular model, but we also like the Speedgoat series for trail running and the Anacapa hikers for more rugged terrain.
From Agni 5 to Akash & hypersonics: Decoding India's homegrown arsenal & defence shield
The ongoing conflicts in Ukraine, on the borders of Israel and in the Persian Gulf have underscored the importance of indigenous defence technologies and a domestic industry to back innovation. India has been steadily working to become self-reliant in defence manufacturing. The country is now on a razor’s edge—designing, developing, and deploying homegrown defence technologies.
Can You Stop a Hypersonic Missile?
Can You Stop a Hypersonic Missile? The headlines say yes. Patriot crews shot down a Kinzhal over Kyiv on the night of May 4, 2023.
Efficient and accurate neural-field reconstruction using resistive memory
Abstract Applications such as medical imaging, augmented and virtual reality, and embodied artificial intelligence (AI) depend on the ability to reconstruct complex signals from sparse observations. These applications are characterized by incomplete measurements and limited computational resources. Traditional approaches to digital hardware face the following challenges: explicit signal representations require heavy sampling and storage, data movement across the von Neumann bottleneck...
Show HN: Mach – A compiled systems language looking for contributions
Hi HN,I'm the creator of Mach (https://github.com/octalide/mach or https://machlang.org). Two days ago, we finally achieved full self hosting. I wanted to make a post here to show off the language since this is a big milestone for us.
Norks blast 250+ fake job offers to developers over 6 weeks to try and snarf creds and crypto
There's another likely North Korean-linked scam hitting developers and their employers, while snarfing up credentials and cryptocurrency - and this one doesn't even involve embedding IT workers at high-profile tech giants. A previously unseen phishing crew, suspected to have DPRK ties, sent more than 250 emails to people working in almost 100 organizations, mostly based in the US, over six weeks in April and May. According to security sleuths, it is yet another digital-heist attempt designed...