Nuclides vs RYURAKU

Nuclides is a professional reference and calculation toolkit for nuclear technology, radiation protection, nuclear medicine, reactor data, and education. Key features: 1. Look up elements and nuclides, including half-life, decay modes, parent and daughter nuclides, radiation energies, and emission probabilities. 2. Explore extended nuclear data, including excited levels, gamma transitions, electron data, fission yields, nuclear moments, and ENSDF evaluation information. 3. Simulate gamma spectra from nuclide gamma-ray data with controls for live time, energy resolution, background, dead-time loss, and related detector parameters. 4. Run decay calculations, activity estimation, dose-rate estimation, effective dose estimation, radiation dose comparison, and unit conversions. 5. Use theranostics dosimetry tools for time-activity data, cumulated activity, and simplified MIRD relationships. 6. Consult radiation safety atlas entries, radiopharmaceutical references, material densities, physical constants, binding-energy charts, toxicity information, and the INES scale. 7. Browse nuclear power plant data, operating records, advanced reactor references, and small modular reactor information. Nuclides is designed for professionals, students, and users who need fast nuclear data lookup, radiation calculations, and clear technical references. Premium subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

RYURAKU is an interactive educational simulation app for experiencing fluid dynamics phenomena firsthand. The 6th installment in the SUUGAKU / BUTURAKU / DENRAKU / HARAKU / NETURAKU series. The theme is "flow." Discover the wonders of fluid physics and the depth of physical laws through 10 hands-on simulations. [10 Simulations] 1. Streamline Visualization Visualize potential flow around a cylindrical obstacle in a uniform stream using particles. Drag the obstacle to move it and observe how the flow field changes in real time. 2. Bernoulli's Principle Visualize flow inside a Venturi tube. Watch how flow speed increases and pressure drops as the pipe narrows, with real-time pressure gauges. Intuitively understand the continuity equation A1v1 = A2v2. 3. Vortex Simulate point vortex creation and mutual induction. Tap to add a counterclockwise vortex, long press for clockwise. Observe complex vortex motion patterns. 4. Reynolds Number Visualize laminar-turbulent transition in pipe flow. Adjust flow speed, viscosity, and pipe diameter to manipulate the Reynolds number and experience the dramatic change at Re ≈ 2300. 5. Lift Force Visualize flow around an airfoil and the mechanisms behind lift and drag generation. Change the angle of attack or camber to see how the lift coefficient varies, with force vectors displayed in real time. 6. Kármán Vortex Street Visualize alternating vortex shedding behind a cylinder. Strouhal and Reynolds numbers are displayed in real time, helping you understand the relationship between shedding frequency, flow speed, and cylinder diameter. 7. Boundary Layer Visualize boundary layer development over a flat plate. Observe how viscous effects slow the fluid near the wall. Experience the transition from laminar (Blasius solution) to turbulent flow at the critical Reynolds number Re_x ≈ 5×10^5. 8. Magnus Effect Visualize the asymmetric flow and lift force around a spinning cylinder. Understand the physics behind curveballs in baseball, banana kicks in soccer, and slice shots in golf. 9. Darcy's Law [NEW] Visualize slow flow through a porous medium such as sand or rock. Adjust permeability, pressure gradient, and porosity to experience the law q = (k/μ)·∇P that governs groundwater, oil reservoirs, filters, and soil seepage. 10. Surface Wave [NEW] Visualize free-surface gravity waves. As the depth-to-wavelength ratio changes, particle orbits transition smoothly from circles (deep water) to flattened ellipses (shallow water). Directly observe the Airy dispersion relation ω^2 = gk·tanh(kh). [Features] - Real-time parameter adjustment for all simulations - Live physics formulas and numerical values - Japanese / English support - Dark mode / Light mode - Clean, intuitive UI [Monetization & Ads] - This app is free to download and use - No in-app purchases, no subscriptions, no paid unlocks - A banner ad (Google AdMob) is shown at the bottom of the screen - On iOS, personalized ads are only delivered after the user grants App Tracking Transparency (ATT) permission [Recommended for] - Students studying fluid dynamics in physics class - Anyone who wants to intuitively understand the behavior of flow - Teachers looking for interactive teaching materials - Anyone interested in aeronautical engineering or fluid mechanics