A Two Loop Shoelace Granny Knot In The Coronary Sinus
نویسنده
چکیده
Images in Electrophysiology A Two Loop Shoelace Granny Knot In The Coronary Sinus Gabriel Vanerio, MD CASMU Arrhythmia Service and British Hospital Montevideo, 2420 Av. Italia, Montevideo 1600, Uruguay. Address for correspondence: Gabriel Vanerio, MD, CASMU Arrhythmia Service and British Hospital Montevideo, 2420 Av. Italia, Montevideo 1600, Uruguay. E-mail: gvanerio/at/yahoo.com
منابع مشابه
The roles of impact and inertia in the failure of a shoelace knot
The accidental untying of a shoelace while walking often occurs without warning. In this paper, we discuss the series of events that lead to a shoelace knot becoming untied. First, the repeated impact of the shoe on the floor during walking serves to loosen the knot. Then, the whipping motions of the free ends of the laces caused by the leg swing produce slipping of the laces. This leads to eve...
متن کاملQuantum Groups and Knot Invariants
Definition 1.1. Informally, a knot is obtained by gluing together the endpoints of a shoelace in R3, considered up to isotopy (but remembering orientation). A link is the same as a knot, but multiple shoelaces are allowed. A tangle consists of (oriented) shoelaces and two parallel sticks, an upper and a lower, which we may glue some endpoints to. In addition, we assign + and − signs to the poin...
متن کاملThe Granny and the Square Tangle and the Unknotting Number
We show that a knot with a diagram with n granny and square tangles has unknotting number at least n, bridge number > n, and braid index > n. As an application, we construct exponentially many in the crossing number slice knots with arbitrarily high unknotting number.
متن کاملUntying knots in proteins.
A shoelace can be readily untied by pulling its ends rather than its loops. Attempting to untie a native knot in a protein can also succeed or fail depending on where one pulls. However, thermal fluctuations induced by the surrounding water affect conformations stochastically and may add to the uncertainty of the outcome. When the protein is pulled by the termini, the knot can only get tightene...
متن کاملScanning electron microscopic study of monofilament suture knots.
AIMS/BACKGROUND Interrupted corneal sutures are used routinely by many cataract and corneal surgeons. A slim compact knot facilitates burial and allows atraumatic suture removal, with decreased risk of wound dehiscence. The size and morphology of knots tied in different configurations were investigated. METHODS 10-0 nylon suture material was used to tie knots on porcine corneal cataract secti...
متن کامل