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Critical and Flow-Critical Snarks Coincide [PDF]

open access: yesDiscussiones Mathematicae Graph Theory, 2021
Over the past twenty years, critical and bicritical snarks have been appearing in the literature in various forms and in different contexts. Two main variants of criticality of snarks have been studied: criticality with respect to the non-existence of a ...
Máčajová Edita, Škoviera Martin
doaj   +4 more sources

Critical flow – towards a construction flow theory [PDF]

open access: yes, 2006
This paper introduces the concept of Construction Physics as a more comprehensive way of understanding the construction process from a flow perspective.
Floor Maxwell   +4 more
core   +2 more sources

Critical flow velocity phenomenon in erosion-corrosion of pipelines: determination methods, mechanisms and applications

open access: yesJournal of Pipeline Science and Engineering, 2021
The critical flow velocity phenomenon is common in erosion-corrosion of many materials. It is of great importance to develop methods to determine the critical flow velocity and understand mechanisms of the phenomenon so that it can be used for proper ...
Z.B. Wang, Y.G. Zheng
doaj   +3 more sources

The fund-flow approach. A critical survey [PDF]

open access: yesSSRN Electronic Journal, 2009
The fund-flow approach to production theory was first proposed by Nicholas Georgescu-Roegen almost half a century ago. Since then, from time to time it has received attention, but, probably because of its analytical complexity and difficulty to deliver ...
Giuseppe Vittucci Marzetti
core   +3 more sources

Superfluid flow above the critical velocity [PDF]

open access: yesScientific Reports, 2017
Superfluidity and superconductivity have been widely studied since the last century in many different contexts ranging from nuclear matter to atomic quantum gases.
A. Paris-Mandoki   +5 more
doaj   +8 more sources

A proposed correlation for critical flow rate of water flow

open access: yesNuclear Engineering and Technology, 2015
A new correlation predicting the idealized critical mass-flow rates of water for subcooled and saturated liquid water including two-phase water flow was developed for a wide range of upstream stagnation pressures (e.g., 0.5–20.0 MPa).
Yeon-Sik Kim
doaj   +3 more sources

On the place of sonic points in a critical flow [PDF]

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2021
Stationary irrotational barotropic gas flows are investigated on the basis of the analysis of three-dimensional Euler equations. Critical flows in the article are those in which the Mach number is everywhere less than or equal to one, and at least at one
Aleksandr I. Besportochny   +1 more
doaj   +1 more source

The application of a minimum specific energy concept for a fish ladder design [PDF]

open access: yesArchives of Civil Engineering, 2022
Structural solutions in terms of fish ladders and the use of natural materials to construct them often raise concerns regarding the possibility of using the standard calculation methods.
Michał Kubrak   +5 more
doaj   +1 more source

Comparative Analysis of Supersonic Flow in Atmospheric and Low Pressure in the Region of Shock Waves Creation for Electron Microscopy

open access: yesSensors, 2023
This paper presents mathematical-physics analyses in the field of the influence of inserted sensors on the supersonic flow behind the nozzle. It evaluates differences in the flow in the area of atmospheric pressure and low pressure on the boundary of ...
Pavla Šabacká   +7 more
doaj   +1 more source

Application correlation algorithm to create a new critical depth equation for gradually varied flow in trapezoidal channel using teaching–learning and studying [PDF]

open access: yesJournal of Hydraulic Structures, 2020
The critical depth is a hydraulic factor of the flow, it plays a particularly important role in studying and designing for open channels, especially during identification of water surfaces and analyzing to determine the phenomenon of a hydraulic jump in ...
Nguyen Minh Ngoc   +2 more
doaj   +1 more source

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