There are multiple definitions:

1. secure sockets layer(English)

   • an encryption security protocol. Has been replaced by Transport Layer Security
   • TLS
   • Communication, Data exchange

2. Science of Service Laboratory(English)

   • offers a multi-level implementation strategy while considering implementation outcomes (primary aim), patient outcomes (secondary aim), and test putative mediators of implementation outcomes (exploratory aim)
   • CM
   • Addiction and health, Therapeutic approaches
   • https://doi.org…012-023-01297-w

3. semi-supervised learning(English)

   • DN, ERM, FCNN, GCNN, GNN, GSP, NN, VQ
   • Machine learning
   • https://doi.org…OC.2021.3058954

4. self-supervised learning(English)

   • has emerged as a promising alternative, leveraging vast amounts of unlabeled imaging data to learn meaningful representations without explicit annotations
   • AI, LVEF
   • Machine learning, Cardiology, Medical imaging, Medical informatics
   • https://doi.org…med.2025.111148