scholarly journals Theoretical Description of the Hydrodynamic Process after Barrier Lake Formation and Emergency Responses Implementation

Water ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 2506
Author(s):  
Jingwen Wang ◽  
Guangming Tan ◽  
Caiwen Shu ◽  
Chong Zhang ◽  
Rui Wang ◽  
...  
Keyword(s):  
Theoretical Description ◽  
Hydrodynamic Process ◽  
Flow Discharge ◽  
Barrier Lake ◽  
Lake Formation ◽  
Water Level Variations ◽  
Emergency Responses ◽  
Secondary Disasters ◽  
Application Requirements ◽  
Emergency Measures

Barrier lakes are secondary disasters with associated landslides and debris flow that can cause serious damage to the downstream populations and areas. Existing studies are lacking in comprehensive descriptions of the rescue process, where the main channel streamflow varies and topographic erosion develops, as well as engineering disposal performs. This paper aimed to theoretically investigate the formation and emergency responses to barrier lakes using on-the-spot investigation and calculus theory. The results showed that the formation of a barrier lake led to a sudden variation in the flow-change rate (normal to infinite). However, after implementing emergency measures, this rate returned to normal. The whole rescue process could be regarded as the accumulation of disposal effects. Volume changes in the main streams were expressed by a differential equation of the lake surface area and water level variations. In addition, a corresponding theoretical description of flow discharges was also given when engineering measures such as the excavation of diversion channels and engineering blasting were adopted. Specifically, the theoretical expressions of flow discharge were given respectively in the developing stage and breach stable stage after the excavation of diversion channels. The flow discharge through certain sections was also described theoretically when engineering blasting was chosen to widen and deepen the cross-section of the diversion channels. Overall, this paper mathematicizes and theorizes the existing emergency measures, which helps to better understand their implementation principles and application requirements.

scholarly journals The Politics of Exceptionalism: Securitization and COVID-19

2021 ◽  
Vol 1 (3) ◽  
Author(s):  
Jessica Kirk ◽  
Matt McDonald
Keyword(s):  
United Kingdom ◽  
New Zealand ◽  
Police Powers ◽  
Significant Variability ◽  
The United Kingdom ◽  
Emergency Responses ◽  
Context Specific ◽  
Emergency Measures

Abstract The suggestion that we “are at war” with the coronavirus pandemic was not uncommon in national representations of the challenge posed by the virus. Such a representation was in turn frequently linked to the imperative of emergency responses, including expanded police powers, national lockdowns, and border closures. For theorists of securitization, this is not surprising. For them, the language of security and existential threat enables extraordinary and exceptional practices. This paper interrogates these assumptions about the performative and enabling role of securitizing language by beginning with emergency measures and asking how these were justified, how they became possible, and how prominent the language of “security” was to this politics of exceptionalism. It examines justifications for emergency responses—national lockdown and/or border closures—in the United Kingdom, Australia, and New Zealand in March 2020. Ultimately, the cases examined demonstrate significant variability in justifications for similar extreme measures. In the process, this analysis challenges core assumptions about the conditions in which extraordinary measures become possible, suggesting, in turn, the need for a context-specific understanding of both securitization and the conditions of exceptionalism.

Polen: Flüchtlingsnotstand – aber wo sind die Flüchtlinge?

2005 ◽  
Vol 35 (140) ◽  
pp. 379-392
Author(s):  
Helmut Dietrich
Keyword(s):  
European Union ◽  
Western Europe ◽  
The European Union ◽  
Local Conditions ◽  
Asylum Policy ◽  
The Face ◽  
Emergency Measures

Poland accepted the alien and asylum policy of the European Union. But what does it mean, in the face of the fact that most of the refugees don´t want to sojourn a lot of time in Poland, but want to join their families or friends in Western Europe? How the transfer of policies does work, if the local conditions are quite different than in Germany or France? The answer seems to be the dramatization of the refugee situation in Poland, especially the adoption of emergency measures towards refugees of Chechnya.

SOME FEATURES OF CRIMINAL PROCEDURE IN RUSSIA IN CONNECTION WITH THE SPREAD OF CORONAVIRUS INFECTION (COVID-19)

2020 ◽  
Vol 10 (3) ◽  
pp. 149-154
Author(s):  
YURI FRANCIFOROV ◽  
◽  
MARINA BARANOVA
Keyword(s):  
Preliminary Investigation ◽  
Preventive Measure ◽  
Judicial System ◽  
Emergency Situations ◽  
Judicial Proceedings ◽  
Coronavirus Infection ◽  
The Russian Federation ◽  
The Government ◽  
Judicial Actions ◽  
Emergency Measures

The purpose of the article is to consider the peculiarities of investigative and judicial actions that are caused by their postponement, the inability to attract a lawyer, as well as the suspension of the preliminary investigation during the period of emergency measures taken by the government of the Russian Federation in response to the outbreak of the coronavirus infection pandemic (COVID-19). The authorsanalyze the features of the courts activity in connection with the coronavirus pandemic, which is associated with minimizing the personal reception of citizens and submitting documents via electronic Internet reception offices of courts or by Russian Post, as well as the possibility of conducting online court sessions. The authors come to the conclusion that the judicial system was not sufficiently prepared for the pandemic, and therefore it is urgently necessary to adopt a special normative act that would regulate the implementation of judicial proceedings in emergency situations, allowing to continue to consider urgent cases, including materials on the election, extension, cancellation or change of a preventive measure.

Analysis of shear bands in slow granular flows using a frictional Cosserat model

2000 ◽  
Vol 627 ◽  
Author(s):  
Prabhu R. Nott ◽  
K. Kesava Rao ◽  
L. Srinivasa Mohan
Keyword(s):  
Scaling Laws ◽  
Shear Bands ◽  
Shear Layers ◽  
Theoretical Description ◽  
Field Variable ◽  
Cosserat Continuum ◽  
Momentum Balance ◽  
Rigid Plastic ◽  
Independent Field ◽  
Cosserat Model

ABSTRACTThe slow flow of granular materials is often marked by the existence of narrow shear layers, adjacent to large regions that suffer little or no deformation. This behaviour, in the regime where shear stress is generated primarily by the frictional interactions between grains, has so far eluded theoretical description. In this paper, we present a rigid-plastic frictional Cosserat model that captures thin shear layers by incorporating a microscopic length scale. We treat the granular medium as a Cosserat continuum, which allows the existence of localised couple stresses and, therefore, the possibility of an asymmetric stress tensor. In addition, the local rotation is an independent field variable and is not necessarily equal to the vorticity. The angular momentum balance, which is implicitly satisfied for a classical continuum, must now be solved in conjunction with the linear momentum balances. We extend the critical state model, used in soil plasticity, for a Cosserat continuum and obtain predictions for flow in plane and cylindrical Couette devices. The velocity profile predicted by our model is in qualitative agreement with available experimental data. In addition, our model can predict scaling laws for the shear layer thickness as a function of the Couette gap, which must be verified in future experiments. Most significantly, our model can determine the velocity field in viscometric flows, which classical plasticity-based model cannot.

Set-Theoretical Description of the System for Control of the State of Technical Information Protection

2005 ◽  
Vol 64 (3) ◽  
pp. 227-237
Author(s):  
A. V. Zhizhelev ◽  
S. V. Zhilinskii ◽  
A. V. Klyshevskii ◽  
S. A. Golovin
Keyword(s):  
Technical Information ◽  
Theoretical Description ◽  
The State ◽  
Information Protection

Theoretical description of nucleons correlations of even-even atomic nuclei

2003 ◽  
Vol 14 (0) ◽  
pp. 40-45
Author(s):  
Р. М. Плекан ◽  
В. Ю. Пойда ◽  
І. В. Хіміч
Keyword(s):  
Theoretical Description ◽  
Atomic Nuclei

The Determination of the Magnetoelectric Coupling Coefficient in Ferroelectric–Ferromagnetic Composite Based on PZT–Ferrite

2013 ◽  
Vol 58 (4) ◽  
pp. 1401-1403 ◽  
Author(s):  
J.A. Bartkowska ◽  
R. Zachariasz ◽  
D. Bochenek ◽  
J. Ilczuk
Keyword(s):  
Dielectric Permittivity ◽  
Coupling Coefficient ◽  
Mean Field ◽  
Field Approximation ◽  
Theoretical Description ◽  
Magnetoelectric Coupling ◽  
Mean Field Approximation ◽  
Dielectric Measurements ◽  
Temperature Dependences ◽  
Multiferroic Composite

Abstract In the present work, the magnetoelectric coupling coefficient, from the temperature dependences of the dielectric permittivity for the multiferroic composite was determined. The research material was ferroelectric-ferromagnetic composite on the based PZT and ferrite. We investigated the temperature dependences of the dielectric permittivity (") for the different frequency of measurement’s field. From the dielectric measurements we determined the temperature of phase transition from ferroelectric to paraelectric phase. For the theoretical description of the temperature dependence of the dielectric constant, the Hamiltonian of Alcantara, Gehring and Janssen was used. To investigate the dielectric properties of the multiferroic composite this Hamiltonian was expressed under the mean-field approximation. Based on dielectric measurements and theoretical considerations, the values of the magnetoelectric coupling coefficient were specified.

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