Results 1 to 10 of about 288,674 (278)

Case Report: A sailor's knot in the heart: percutaneous retrieval of a knotted temporary pacing lead [PDF]

Frontiers in Cardiovascular Medicine
BackgroundTemporary transvenous pacing in patients with permanent atrial fibrillation and significant tricuspid valve disease is technically challenging, especially in the absence of fluoroscopic guidance. Catheter looping and knot formation are rare but
Roberto Scacciavillani, Roberto Scacciavillani, Simone Filomia, Simone Filomia, Gaetano Pinnacchio, Gaetano Pinnacchio, Gianluigi Bencardino, Gianluigi Bencardino, Tommaso Sanna, Tommaso Sanna, Gemma Pelargonio, Gemma Pelargonio   +11 more
doaj   +2 more sources

Knot staining resistance of wood coatings

Les, 2021
After wood has been coated and exposed to external climatic conditions and/or elevated temperatures, staining of the coating film by hydrophilic and lipophilic extractives may occur where knots are located.
Matjaž Pavlič, Jure Vrbec, Jure Žigon, Marko Petrič   +3 more
doaj   +1 more source

Optical vortex knots and links via holographic metasurfaces

Advances in Physics: X, 2021
Vortices arise in many natural phenomena as dark points of total destructive interference. Sometimes they form continuous lines and even enclosed loops with knotted or linked topologies in three spatial dimensions.
Peng Li, Xuyue Guo, Jinzhan Zhong, Sheng Liu, Yi Zhang, Bingyan Wei, Jianlin Zhao   +6 more
doaj   +1 more source

Creation of electrical knots and observation of DNA topology

New Journal of Physics, 2021
Knots are fascinating topological structures that have been observed in various contexts, ranging from micro-worlds to macro-systems, and are conjectured to play a fundamental role in their respective fields.
Tian Chen, Xingen Zheng, Qingsong Pei, Deyuan Zou, Houjun Sun, Xiangdong Zhang   +5 more
doaj   +1 more source

On groups Gnk and Γnk: A study of manifolds, dynamics, and invariants

Bulletin of Mathematical Sciences, 2021
Recently, the first named author defined a 2-parametric family of groups Gnk [V. O. Manturov, Non–reidemeister knot theory and its applications in dynamical systems, geometry and topology, preprint (2015), arXiv:1501.05208].
Vassily O. Manturov, Denis A. Fedoseev, Seongjeong Kim, Igor M. Nikonov   +3 more
doaj   +1 more source

Surface Roughness of Sliced Veneers in Terms of Defects and Wood Structure Variability – Impact of Mild Hydrothermal Treatment

Drvna Industrija, 2022
Τhis study deals with the surface roughness and quality of oak sliced veneers and how these characteristics are influenced by the presence of knots, and other defects associated to knots.
Vasiliki Kamperidou, Efstratios Aidinidis, Ioannis Barboutis   +2 more
doaj   +1 more source

An influence of abiotic factors on the germinability of Agrostis species and Poa species

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2006
The objective of this contribution is to interpret the impact of some abiotic factors on the germinability. Primarily was observed the stress that they cause on germinability and also on the energy of other perennial grass caryopsis' germinability ...
Pavel Knot
doaj   +1 more source

Tile Number and Space-Efficient Knot Mosaics [PDF]

, 2017
In this paper we introduce the concept of a space-efficient knot mosaic. That is, we seek to determine how to create knot mosaics using the least number of non-blank tiles necessary to depict the knot.
Adams, Barton, Bazzaz, Bradstock, Bradstock, Bradstock, Brosofske, Burnham, Camac, Clarke, Clarke, Dubayah, Fornwalt, Fu, Gessler, Getis, Gill, Glenn, Gonzalez-Olabarria, Gordon, Hammill, Harpold, Jakubowksi, Kane, Kane, Keeley, Keeley, Knox, Levick, Liyanage, McCarthy, Miller, Mitchard, Moore, Murphy, Nakagawa, Ooi, Ord, Price, Price, Purdie, Purdon, R Development Core Team, Rich, Tozer, Turner, Wasser, Watson, Zuur   +48 more
core   +4 more sources

Clipping management and its effect on the composition and height of low-input turf

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2013
The effect of mulching and moving management on the height and the composition of low-input turf was studied in Vatin research station of fodder crops regularly in May, during years 2007–2012.
Pavel Knot
doaj   +1 more source

Genus two mutant knots with the same dimension in knot Floer and Khovanov homologies [PDF]

, 2012
We exhibit an infinite family of knots with isomorphic knot Heegaard Floer homology. Each knot in this infinite family admits a nontrivial genus two mutant which shares the same total dimension in both knot Floer homology and Khovanov homology. Each knot
Allison H Moore, Dunfield, Laura Starkston   +2 more
core   +1 more source