第九十六条 需要传唤违反治安管理行为人接受调查的，经公安机关办案部门负责人批准，使用传唤证传唤。对现场发现的违反治安管理行为人，人民警察经出示人民警察证，可以口头传唤，但应当在询问笔录中注明。
Author(s): Fiorella Cravero, Ignacio Ponzoni, Mónica F. Diaz, Gustavo E. Vazquez
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One study often cited is by Canadian psychologists Donald Dutton and Susan Painter. In research published in 1993 while they were at the University of British Columbia, they followed 75 women after they had left abusive partners.
Leonardo da Vinci is usually credited with conducting the first systematic study of friction in the late 15th century, a subfield now known as tribology that deals with the dynamics of interacting surfaces in relative motion. Da Vinci's notebooks depict how he pulled rows of blocks using weights and pulleys, an approach that is still used in frictional studies today, as well as examining the friction produced in screw threads, wheels, and axles. The authors of this latest paper used an experimental setup similar to da Vinci's.