Nuclear Wallet Cards vs Relational Algebra

Explore nuclear data within Nuclear Wallet Cards, the comprehensive source for ground and isomeric state properties of every known nuclide. Based on the original reference booklet from the National Nuclear Data Center (NNDC) at Brookhaven National Laboratory (BNL), the Nuclear Wallet Cards app delivers authoritative nuclear data in an accessible and interactive format. Key Features: • Powerful Search & Filter: Quickly search by nucleus name or filter datasets by stability, atomic number, neutron count, atomic mass, excitation energy, half-life, abundance, mass excess, spin parity, and branching ratios. • Interactive Periodic Table: Navigate a dynamic periodic table with intuitive pan and zoom gestures. Tap any element to instantly view detailed isotopic datasets. • Reliable & Authoritative Data: Access precise nuclear data that supports research, education, and applied nuclear science. Whether you're a researcher, educator, or student, Nuclear Wallet Cards is your essential, user-friendly reference for all your nuclear data needs. Download now and start exploring nuclear data! Produced and maintained by the National Nuclear Data Center (NNDC) at Brookhaven National Laboratory (BNL).

Relational Algebra is an independent study app for building confidence with database theory, query logic, and formal operations through focused practice. Designed for students, self-learners, interview preparation, and anyone reviewing database fundamentals, the app includes 160 questions across Fundamentals, Practical Skills, Common Pitfalls, and Advanced Concepts. - FSRS spaced-repetition intervals to help you review at the right time - Weak-point heatmap to show topics that need more attention - Daily challenge for consistent practice - Mock exams for timed review sessions - Every question includes an explanation - Offline practice with no login required Use it to practice selection, projection, joins, set operations, division, equivalence, query transformation, and common reasoning mistakes. Independent study app for Relational Algebra practice. Not affiliated with, endorsed by, or sponsored by any company, certification body, exam operator, or vendor. All trademarks belong to their respective owners. Practice offline, no login required.