Results 21 to 30 of about 404,055 (327)

High Girth Hypergraphs with Unavoidable Monochromatic or Rainbow Edges

open access: yesDiscussiones Mathematicae Graph Theory, 2022
A classical result of Erdős and Hajnal claims that for any integers k, r, g ≥ 2 there is an r-uniform hypergraph of girth at least g with chromatic number at least k.
Axenovich Maria, Karrer Annette
doaj   +1 more source

Thermodynamic phase transition of a black hole in rainbow gravity

open access: yes, 2017
In this letter, using the rainbow functions that were proposed by Magueijo and Smolin, we investigate the thermodynamics and the phase transition of rainbow Schwarzschild black hole.
Feng, Zhong-Wen, Yang, Shu-Zheng
core   +4 more sources

The kinematics of particles moving in rainbow spacetime [PDF]

open access: yes, 2006
The kinematics of particles moving in rainbow spacetime is studied in this paper. In particular the geodesics of a massive particle in rainbow flat spacetime is obtained when the semi-classical effect of its own energy on the background is taken into ...
HONGBAO ZHANG, Ling Y., SONG HE, YI LING
core   +2 more sources

Laste mõtlemine. Pilved, vihm ja vikerkaar laste seletustes [PDF]

open access: yesMäetagused, 2010
The article describes the learning process of children, and the associated difficulties in the transfer from everyday thinking to scientific. Everyday explanations (direct descriptions of phenomena, fragments heard from adults, analogy-based explanations)
Eve Kikas
doaj  

Water and Insularity as Structural Elements in D.H. Lawrence’s The Rainbow and Women in Love

open access: yesÉtudes Lawrenciennes, 2023
The article argues that the element of water (supplemented by the presence of islands and an island existence) serves as a wide-ranging and thus typically modernist leitmotif in the duology The Rainbow and Women in Love, taking its ultimate inspiration ...
Peter Fjågesund
doaj   +1 more source

An Improved Identity-Based Multivariate Signature Scheme Based on Rainbow

open access: yesCryptography, 2019
Multivariate Public Key Cryptography (MPKC) is one of the main candidates for post-quantum cryptography, especially in the area of signature schemes. In this paper, we instantiate a certificate Identity-Based Signature (IBS) scheme based on Rainbow, one ...
Le Van Luyen
doaj   +1 more source

Evidence for a secondary bow in Newton's zero-order nuclear rainbow [PDF]

open access: yes, 2014
Rainbows are generally considered to be caused by static refraction and reflection. A primary and a secondary rainbow appear due to refraction and internal reflection in a raindrop as explained by Newton.
Hirabayashi, Y., Ohkubo, S.
core   +2 more sources

Vertex Colorings without Rainbow Subgraphs

open access: yesDiscussiones Mathematicae Graph Theory, 2016
Given a coloring of the vertices of a graph G, we say a subgraph is rainbow if its vertices receive distinct colors. For a graph F, we define the F-upper chromatic number of G as the maximum number of colors that can be used to color the vertices of G ...
Goddard Wayne, Xu Honghai
doaj   +1 more source

On the Stability of Einstein Static Universe in Doubly General Relativity Scenario [PDF]

open access: yes, 2015
By presenting a relation between average energy of the ensemble of probe photons and energy density of the Universe, in the context of {\it gravity's rainbow} or {\it doubly general relativity} scenario, we introduce a rainbow FRW Universe model.
Darabi, F.   +3 more
core   +2 more sources

Cross‐Scale Hierarchical Targeted Delivery System Based on Small‐Scale Magnetic Robots

open access: yesAdvanced Robotics Research, EarlyView.
This article reviews a cross‐scale hierarchical targeted delivery system that integrates magnetic continuum robots and magnetic microrobots. By combining rapid long‐range navigation with precise microscale targeting, the system overcomes key limitations of single‐scale approaches.
Junjian Zhou   +4 more
wiley   +1 more source

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