Results 121 to 130 of about 279,221 (324)

DETECCIÓN DE NUDOS EN MADERA CON TÉCNICAS DE MICROONDAS

open access: yesMaderas: Ciencia y Tecnología, 2003
En este trabajo se lleva a cabo un estudio preliminar de detección de nudos en madera sólida creciente en Chile, por medio de la utilización de radiación de microondas.
E BARADIT, R AEDO, J CORREA
doaj  

Khovanov Laplacian and Khovanov Dirac for knots and links

open access: yesJournal of Physics: Complexity
Khovanov homology has been the subject of much study in knot theory and low dimensional topology since 2000. This work introduces a Khovanov Laplacian and a Khovanov Dirac to study knot and link diagrams.
Benjamin Jones, Guo-Wei Wei
doaj   +1 more source

Squeezed knots

open access: yesQuantum Topology
Squeezed knots are those knots that appear as slices of genus-minimizing oriented smooth cobordisms between positive and negative torus knots. We show that this class of knots is large and discuss how to obstruct squeezedness. The most effective obstructions appear to come from quantum knot invariants, notably including refinements of the Rasmussen ...
Peter Feller, Lukas Lewark, Andrew Lobb
openaire   +2 more sources

Metasurfaces and Metadevices for Topological Electromagnetic Waves

open access: yesAdvanced Physics Research, EarlyView.
Optical topologies refer to diverse topological localized structures made by diverse parameters of light fields, such as vortices, skyrmions, and hopfions. This article navigates a direction of metasurface‐based integrated devices for generation, manipulation and detection of novel topologies of light, which would be a rapidly growing interdisciplinary
Rensheng Xie   +3 more
wiley   +1 more source

Early stages of tooth development in the harbor porpoise Phocoena phocoena

open access: yesThe Anatomical Record, EarlyView.
Abstract Here we describe the stages of tooth development in toothed whales on the basis of the harbor porpoise (Phocoena phocoena). The aim of the study was to find out whether these stages are identical to those of other mammals analyzed so far although toothed whales are homodont and monophyodont.
Lasse M. Mathes   +2 more
wiley   +1 more source

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