Results 121 to 130 of about 22,016 (260)

The upper chromatic number of quasi-interval co-hypergraphs

open access: yesLe Matematiche, 1997
We investigate the structural and colouring properties of clique hyper-graphs of interval graphs called the quasi-interval hypergraphs. We find the conditions when they are interval hypergraphs. The upper chromatic number for the clique co-hypergraphs of
Violeta Prisakaru
doaj  

On The Chromatic Number of Matching Graphs [PDF]

open access: green, 2022
Meysam Alishahi, Hossein Hajiabolhassan
openalex   +1 more source

Advanced Image‐Guidance and Surgical‐Navigation Techniques for Real‐Time Visualized Surgery

open access: yesAdvanced Science, EarlyView.
This review comprehensively summarizes advances in surgical navigation, covering both established and emerging intraoperative imaging technologies. It highlights mechanisms, advantages, limitations, and clinical applications, while emphasizing interdisciplinary collaboration.
Xiaoxiao Fan   +9 more
wiley   +1 more source

Scattering‐Enhanced Light Extraction for Radiative Thermal Load Mitigation in Fluorescent Films

open access: yesAdvanced Science, EarlyView.
Scattering‐enhanced light extraction overcomes total internal reflection limitations in fluorescent films, expanding the sub‐ambient cooling color range from 26.7% to 64.9% in CIE 1931 space. Optimal TiO2 nanoparticle doping (0.5 wt.%) achieves 85.9% light extraction efficiency and 89.5% visible reflectance.
Chenglong She   +6 more
wiley   +1 more source

On b-acyclic chromatic number of a graph [PDF]

open access: hybrid, 2022
Marcin Anholcer   +2 more
openalex   +1 more source

Partial Reprogramming in Senescent Schwann Cells Enhances Peripheral Nerve Regeneration via Restoration of Stress Granule Homeostasis

open access: yesAdvanced Science, EarlyView.
In this study, it is discovered that pathological accumulation of Runx2+ Schwann cell clusters​ during axonal regeneration is a key factor impairing nerve repair in aging. This pathology is associated with ​dysregulation of stress granule homeostasis.
Peilin Wang   +10 more
wiley   +1 more source

Wavelength Tunable Pulsed Lasers Enabled by a Versatile Metafiber Functioning as Both Saturable Absorber and Filter

open access: yesAdvanced Science, EarlyView.
Schematic diagram of wavelength‐tunable pulsed laser based on metafiber‐FP (Fabry‐Perot). The alcohol solution is filled inside the FP cavity to simultaneously form a spectral filter and a saturable absorber. By adjusting the refractive index value and temperature inside the cavity, the tunable filtering effect is introduced to realize wavelength ...
Bo Fu   +8 more
wiley   +1 more source

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