Furloug

Sorry! Due to sequestration, we had to cut te 8t letter of te alpabet. Unofficial nerdy tweets on ORSA & defense acquisition. You get what you pay for. #goblue

[Furloug @Furloug]

This is DEFINITELY going to become a meme

[Mario Nawfal @MarioNawfal]

🇵🇰🇮🇷 Pakistan's Prime Minister got the news mid-meeting that the Iranian delegation was walking out after Trump's latest threat and the look on his face says everything words cannot

Writer: Oliver

[Furloug @Furloug]

#JCPOA2 #JCPOA

[Yaroslav Trofimov @yarotrof]

Lots of US military aircraft — refuelers and ISR — with their transponders on in the Strait of Hormuz area right now. Things are clearly happening.

[Sam Walters ☕️ @SamuelGWalters]

A simple proof that there is no measure on infinite dimensional Hilbert space similar to the standard Lebesgue measure on Euclidean space ℝⁿ. #math #calculus #MeasureTheory #geometry #HilbertSpace

[Redstone Arsenal @TeamRedstone]

Off-duty Redstone police Lt. Derek Jones saved retired Maj. Gen. Lynn Collyar’s life by performing CPR after he collapsed from cardiac arrest during a half marathon in Tennessee. Jones was later awarded a Civilian Service Commendation Medal,

https://t.co/gBBJSOpE7S

[Gaurab Chakrabarti @Gaurab]

You cannot buy a new gas turbine until 2030. Order books at GE, Siemens, and Mitsubishi stretch to 2029. Turbine prices have nearly tripled since 2019. Every AI data center needs power and every gas plant needs a turbine. And every turbine has one part that bottlenecks the entire industry: The blade. It has to survive in gas 500°C above the melting point of the metal it's made from and spin at up to 20,000 RPM under 10,000 g of centrifugal force. Each blade is grown as a single crystal of nickel superalloy, pulled through a vacuum furnace at 3 mm per minute. A set of blades costs $600,000 and takes 90 weeks to grow. The same metallurgy powers modern jet engines. Only 3 companies on Earth can build one. China spent $42 billion trying to catch up. They bought a Russian fighter engine, took it apart, and copied every part. Their copy ran 30 hours between overhauls versus 400 for the original. Modern Western engines run 4,000. You can reverse engineer the shape of a turbine blade. You cannot reverse engineer 60 years of metallurgy.

[Probability Fact @ProbFact]

The moment generating function of a random variable X is the two-sided Laplace transform of its density function f_X, with the sign of the argument flipped.

[Algebra Etc. @AlgebraFact]

In an associative algebra A, define [a,b] = ab-ba. Then [a,b] + [b,a] = 0 and [a,[b,c]] + [b,[c,a]] + [c,[a,b]] = 0, making A a Lie algebra.

[Probability Fact @ProbFact]

'There are only five probabilities the average human can handle: 99 percent, one percent, 100 percent, zero, and 50-50. That’s it.” — Richard Thaler

[Analysis Fact @AnalysisFact]

For the generalization to nth derivatives, see this post.

https://t.co/ORep2Cq9wm

[Analysis Fact @AnalysisFact]

The generalization isn't obvious. Here's the second derivative.

[Analysis Fact @AnalysisFact]

Quotient rule in a form that suggests a way to generalize to repeated derivatives

[Analysis Fact @AnalysisFact]

A normed space X is finite dimensional iff every linear functional on X is continuous.

[Differential Eqns @diff_eq]

The first thing people did with early electronic computers was numerically solve differential equations.

[Topology Fact @TopologyFact]

The four color theorem was the first major theorem proved with the aid of computers. https://t.co/5E0GgBYpHX

[Algebra Etc. @AlgebraFact]

If a group G acts on a set A, the stabilizer of an element a of A is the subgroup of G whose action leaves a fixed.

[Tymofiy Mylovanov @Mylovanov]

Petraeus: The front is now a 35-kilometer death zone in either direction.

Logistics move remotely, anything caught there for long gets taken out, and maritime drones have sunk over 35% of Russia’s Black Sea Fleet. It is the most lethal front line in history. 2/

[Air-Power | NatSec Ledger @NatSecLedger]

The US Army on April 16th awarded Raytheon Missiles and Defense a $904 MM contract modification to support the low-rate initial production of five Lower Tier Air and Missile Defense System (LTAMDS) units and six spares. Work will be performed in Andover, Massachusetts, with an estimated completion date of Aug. 29, 2031. LTAMDS is a next generation Gallium Nitride (GaN) powered 360° C-band sensor organically compliant with Army's Integrated Air and Missile Defense Battle Command System (IAMD-BCS). (📸US Army)

[Bruno Tertrais @BrunoTertrais]

It’s a Schrödinger’s Strait.

[Caitlin Doornbos @CaitlinDoornbos]

Iranian officials are still considering the US proposal to end the war, centered around giving up uranium enrichment.

One thing affecting why Iran couldn’t make a deal while US was in Islamabad: while Vance called Trump 6+ times, Iranians could not call their final decision-maker back in Tehran due to security risks — and likely would have had to return home to discuss an agreement in person, a Pakistani analyst told me.