iTurbo vs StampReady

This application performs a Direct Numerical Simulation (DNS) where the Navier-Stokes equations are solved for two dimensional incompressible homogeneous turbulence. These equations are a set of nonlinear partial differential equations. The time stepping is performed with a simple Euler method where the time step is calculated so that the CFL number does not exceeds the given number (should be less than 0.8 otherwise the simulation blows up). The equations are solved in the Fourier space where the calculation of the nonlinear term transforms to a simple multiplication. The main CPU usage is consumed by transforming the vorticity field back and fourth between the Normal space where the time-stepping is performed and the Fourier space where the nonlinear term is calculated.

9 PE disciplines. 3,800+ study items. Adaptive mastery tracking. Know exactly when you're ready. The PE exam holds you to a professional standard. Your study material should too. StampReady puts all 9 NCEES PE exam disciplines in one app, with an adaptive engine that static prep materials can't match. 9 DISCIPLINES, WITHOUT PAYING 9X Traditional PE prep can run $1,500 or more. StampReady gives you unrestricted access to all 9 disciplines for a single subscription. - PE Civil: Construction, Geotechnical, Structural, Transportation, Water Resources & Environmental - PE Mechanical: HVAC & Refrigeration · Machine Design & Materials · Thermal & Fluids Systems - PE Electrical & Computer: Power 2,400+ original practice questions. 1,400+ flashcards. Every item written to mirror real exam depth. THE GOAL ISN'T PASSING. IT'S KNOWING. We don't train you to game a test. We build genuine command of engineering principles, codes, and design standards. When you truly know the material, passing becomes a natural result. ADAPTIVE, NOT PASSIVE Take a Baseline Diagnostic. The app maps your strengths and weaknesses across every domain, then builds sessions that close your gaps. A Bayesian mastery model tracks what you actually know — not just what you got right today, but what you'll retain on exam day. - Readiness Index — one score that tells you where you stand - Knowledge Decay Tracking — spaced repetition that flags concepts slipping from memory - Adaptive Gap Analysis — targeted sprint sessions for your weakest areas - Consultant-Style Analytics — domain skill maps, time benchmarks, personalized recommendations - Exam Countdown & Daily Streak - Cross-Device Sync via iCloud BUILT TO GET YOU THROUGH, NOT KEEP YOU SUBSCRIBED We don't offer lifetime access because if the tool works, you shouldn't need it for a lifetime. Hit your readiness benchmark, pass the exam, and move on with your career. PRIVACY-FIRST No account required. No email collected. No data sold. Anonymous analytics only. Your progress stays in your iCloud. SUBSCRIPTION DETAILS Free users get 10 questions per quiz and can preview flashcards across any discipline. Premium unlocks everything: - 3 Months: $99.99 ($33.33/month) - 6 Months: $149.99 ($25.00/month) All plans include a 14-day free trial. Payment is charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. You can manage subscriptions and turn off auto-renewal in your Account Settings. Any unused portion of a free trial is forfeited upon purchasing a subscription. Privacy Policy: https://invictera.com/privacy Terms of Service: https://invictera.com/terms.html Legal & AI Disclosures: https://invictera.com/disclosures.html StampReady is developed by Invictera LLC and is not affiliated with, endorsed by, or sponsored by NCEES. All certification names are trademarks of their respective owners. All content is original. Use of this app is subject to Apple's Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/