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517,985 subject pages: 4,516 OpenAlex topics and 513,469 Library of Congress subjects. Exact coverage and source dates · Numeric map and gap method
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Marine and coastal ecosystems
Concrete and Cement Materials Research
Syntax, Semantics, Linguistic Variation
Phytochemicals and Antioxidant Activities
Advanced Neural Network Applications
Physics of Superconductivity and Magnetism
Tuberculosis Research and Epidemiology
Stellar, planetary, and galactic studies
Adaptive Control of Nonlinear Systems
COVID-19 Clinical Research Studies
Neural and Behavioral Psychology Studies
Substance Abuse Treatment and Outcomes
Protein Structure and Dynamics
Organic Electronics and Photovoltaics
Stability and Control of Uncertain Systems
Financial Markets and Investment Strategies
Particle physics theoretical and experimental studies
Magnetic properties of thin films
Multi-Criteria Decision Making
Asthma and respiratory diseases
Medical Image Segmentation Techniques
International Relations and Foreign Policy
Parallel Computing and Optimization Techniques
Diverse Aspects of Tourism Research
Neurotransmitter Receptor Influence on Behavior
Face and Expression Recognition
Entrepreneurship Studies and Influences
Bone Tissue Engineering Materials
Smoking Behavior and Cessation
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