scholarly journals Methodology of investigation of binary liquids in the unstable states

2021 ◽  
Vol 1867 (1) ◽  
pp. 012019
Author(s):  
S B Rutin ◽  
A A Igolnikov
Keyword(s):  
Binary Liquids ◽  
Unstable States

scholarly journals Investigation of Binary Liquids in Unstable States—An Experimental Approach

Liquids ◽  
2021 ◽  
Vol 1 (1) ◽  
pp. 36-46
Author(s):  
Alexander Igolnikov ◽  
Sergey Rutin ◽  
Pavel Skripov
Keyword(s):  
Local Heat ◽  
Solution Temperature ◽  
Heated Layer ◽  
Polypropylene Glycol ◽  
Critical Solution Temperature ◽  
Binary Liquids ◽  
Unstable Solutions ◽  
Glycol Monobutyl Ether ◽  
Thermal Patterns ◽  
Unstable States

In this article, we present a methodology for conducting measurements based on pulse heating of a wire probe in partially soluble binary liquids. These liquids, which can be rapidly transferred to the region of unstable states above the diffusional spinodal, are novel research objects for the thermophysics of extreme states. Using the example of aqueous solutions of polypropylene glycol and glycol monobutyl ether having a lower critical solution temperature, the key hypothesis of the study on the general measurability of the properties of unstable solutions has been confirmed. The characteristic heating times from 1 to 15 milliseconds corresponded to the thickness of the heated layer comprising a few micrometers. The pressure was varied from units of MPa to 100 MPa. The conditions for the transition from measurements on pure components to those on solutions are formulated. The characteristic thermal patterns of the decay of unstable states depending on pressure and heating rate are revealed. The general possibility of using partially soluble binary liquids as a promising coolant in processes involving powerful local heat release is demonstrated.

scholarly journals Self-healing trans-cloud applications

Computing ◽  
2021 ◽  
Author(s):  
Antonio Brogi ◽  
Jose Carrasco ◽  
Francisco Durán ◽  
Ernesto Pimentel ◽  
Jacopo Soldani
Keyword(s):  
Open Source ◽  
Cloud Services ◽  
Self Healing ◽  
Controlled Experiments ◽  
Fault Handling ◽  
Extensive Evaluation ◽  
Cloud Providers ◽  
Heterogeneous Cloud ◽  
Cloud Applications ◽  
Unstable States

AbstractTrans-cloud applications consist of multiple interacting components deployed across different cloud providers and at different service layers (IaaS and PaaS). In such complex deployment scenarios, fault handling and recovery need to deal with heterogeneous cloud offerings and to take into account inter-component dependencies. We propose a methodology for self-healing trans-cloud applications from failures occurring in application components or in the cloud services hosting them, both during deployment and while they are being operated. The proposed methodology enables reducing the time application components rely on faulted services, hence residing in “unstable” states where they can suddenly fail in cascade or exhibit erroneous behaviour. We also present an open-source prototype illustrating the feasibility of our proposal, which we have exploited to carry out an extensive evaluation based on controlled experiments and monkey testing.

scholarly journals Multi-stable composite twisting structure for morphing applications

2012 ◽  
Vol 468 (2141) ◽  
pp. 1230-1251 ◽  
Author(s):  
X. Lachenal ◽  
P. M. Weaver ◽  
S. Daynes
Keyword(s):  
Analytical Model ◽  
Material Properties ◽  
Degrees Of Freedom ◽  
Design Parameters ◽  
Engineering Structures ◽  
The Past ◽  
Wide Range ◽  
Morphing Structure ◽  
Low Mass ◽  
Unstable States

Conventional shape-changing engineering structures use discrete parts articulated around a number of linkages. Each part carries the loads, and the articulations provide the degrees of freedom of the system, leading to heavy and complex mechanisms. Consequently, there has been increased interest in morphing structures over the past decade owing to their potential to combine the conflicting requirements of strength, flexibility and low mass. This article presents a novel type of morphing structure capable of large deformations, simply consisting of two pre-stressed flanges joined to introduce two stable configurations. The bistability is analysed through a simple analytical model, predicting the positions of the stable and unstable states for different design parameters and material properties. Good correlation is found between experimental results, finite-element modelling and predictions from the analytical model for one particular example. A wide range of design parameters and material properties is also analytically investigated, yielding a remarkable structure with zero stiffness along the twisting axis.

Following momentum and avoiding the “Minsky Moment” evidence from investors on the Financial Instability Hypothesis

2016 ◽  
Vol 8 (3) ◽  
pp. 205-217 ◽  
Author(s):  
Scott Pirie ◽  
Ronald King To Chan
Keyword(s):  
Investment Decisions ◽  
Practical Experience ◽  
Financial Instability ◽  
Investment Strategies ◽  
Momentum Strategies ◽  
Content Type ◽  
Hyman Minsky ◽  
Quantitative Studies ◽  
Regional Markets ◽  
Unstable States

Purpose This study aims to find out how institutional investors use momentum in making investment decisions, and whether their actions are consistent with the Financial Instability Hypothesis of Hyman Minsky. Design/methodology/approach The study discusses the findings of interviews with 25 professional investors from the Hong Kong offices of five global financial institutions. All of the participants have several years of practical experience in global and regional markets. Findings Nearly all the managers interviewed said they use momentum in making investment decisions, and they do this in ways that are consistent with the Financial Instability Hypothesis, in which markets alternate between stable and unstable states. The participants are aware they may contribute to this, but they cannot avoid doing it because of short-term constraints in the present financial system. Originality/value This study adds to our knowledge of how professional investors use momentum in their investment strategies. It complements findings of quantitative studies that show momentum strategies have been profitable in many market settings. It also adds evidence that supports the Financial Instability Hypothesis.

scholarly journals Demixing, remixing and cellular networks in binary liquids containing colloidal particles

Soft Matter ◽  
2010 ◽  
Vol 6 (6) ◽  
pp. 1182 ◽  
Author(s):  
Job H. J. Thijssen ◽  
Paul S. Clegg
Keyword(s):  
Cellular Networks ◽  
Colloidal Particles ◽  
Binary Liquids

scholarly journals Unstable states of a superfluid confined between rotating spheres

2003 ◽  
Vol 29 (8) ◽  
pp. 628-629
Author(s):  
A. Gongadze ◽  
L. Kiknadze ◽  
Yu. Mamaladze ◽  
S. Tsakadze
Keyword(s):  
Unstable States

An experimental study of unstable states in a loop reactor

AIChE Journal ◽  
1970 ◽  
Vol 16 (3) ◽  
pp. 356-358 ◽  
Author(s):  
R. B. Root ◽  
R. A. Schmitz
Keyword(s):  
Experimental Study ◽  
Loop Reactor ◽  
Unstable States

Unstable states in quantum theory

2014 ◽  
Vol 45 (3) ◽  
pp. 568-608 ◽  
Author(s):  
V. I. Kuksa
Keyword(s):  
Quantum Theory ◽  
Unstable States

scholarly journals Refined long-time asymptotics for Fisher–KPP fronts

2019 ◽  
Vol 21 (07) ◽  
pp. 1850072 ◽  
Author(s):  
James Nolen ◽  
Jean-Michel Roquejoffre ◽  
Lenya Ryzhik
Keyword(s):  
Travelling Waves ◽  
American Mathematical Society ◽  
Front Propagation ◽  
Step Function ◽  
Kolmogorov Equation ◽  
Compact Set ◽  
Kpp Equation ◽  
Branching Brownian Motion ◽  
Long Time ◽  
Unstable States

We study the one-dimensional Fisher–KPP equation, with an initial condition [Formula: see text] that coincides with the step function except on a compact set. A well-known result of Bramson in [Maximal displacement of branching Brownian motion, Comm. Pure Appl. Math. 31 (1978) 531–581; Convergence of Solutions of the Kolmogorov Equation to Travelling Waves (American Mathematical Society, Providence, RI, 1983)] states that, as [Formula: see text], the solution converges to a traveling wave located at the position [Formula: see text], with the shift [Formula: see text] that depends on [Formula: see text]. Ebert and Van Saarloos have formally derived in [Front propagation into unstable states: Universal algebraic convergence towards uniformly translating pulled fronts, Phys. D 146 (2000) 1–99; Front propagation into unstable states, Phys. Rep. 386 (2003) 29–222] a correction to the Bramson shift, arguing that [Formula: see text]. Here, we prove that this result does hold, with an error term of the size [Formula: see text], for any [Formula: see text]. The interesting aspect of this asymptotics is that the coefficient in front of the [Formula: see text]-term does not depend on [Formula: see text].

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