scholarly journals System-Analytical Method of Earthquake-Prone Areas Recognition

2021 ◽  
Vol 11 (17) ◽  
pp. 7972
Author(s):  
Boris A. Dzeboev ◽  
Alexei D. Gvishiani ◽  
Sergey M. Agayan ◽  
Ivan O. Belov ◽  
Jon K. Karapetyan ◽  
...  
Keyword(s):  
Analytical Method ◽  
Subduction Zones ◽  
Classical Problem ◽  
Seismic Hazard Assessment ◽  
Point Of View ◽  
Mathematical Methods ◽  
Strong Earthquakes ◽  
Modern Development ◽  
Weak Earthquakes ◽  
High Seismicity

Typically, strong earthquakes do not occur over the entire territory of the seismically active region. Recognition of areas where they may occur is a critical step in seismic hazard assessment studies. For half a century, the Earthquake-Prone Areas (EPA) approach, developed by the famous Soviet academicians I.M. Gelfand and V.I. Keilis-Borok, was used to recognize areas prone to strong earthquakes. For the modern development of ideas that form the basis of the EPA method, new mathematical methods of pattern recognition are proposed. They were developed by the authors to overcome the difficulties that arise today when using the EPA approach in its classic version. So, firstly, a scheme for the recognition of high seismicity disjunctive nodes and the vicinities of axis intersections of the morphostructural lineaments was created with only one high seismicity learning class. Secondly, the system-analytical method FCAZ (Formalized Clustering and Zoning) has been developed. It uses the epicenters of fairly weak earthquakes as recognition objects. This makes it possible to develop the recognition result of areas prone to strong earthquakes after the appearance of epicenters of new weak earthquakes and, thereby, to repeatedly correct the results over time. It is shown that the creation of the FCAZ method for the first time made it possible to consider the classical problem of earthquake-prone areas recognition from the point of view of advanced systems analysis. The new mathematical recognition methods proposed in the article have made it possible to successfully identify earthquake-prone areas on the continents of North and South America, Eurasia, and in the subduction zones of the Pacific Rim.

System-analytical method of strong earthquake-prone areas recognition

2021 ◽  
Author(s):  
Boris Dzeboev ◽  
Alexei Gvishiani ◽  
Boris Dzeranov
Keyword(s):  
Seismic Hazard ◽  
Hazard Assessment ◽  
Analytical Method ◽  
Strong Earthquake ◽  
Subduction Zones ◽  
Seismic Hazard Assessment ◽  
Hazard Identification ◽  
Strong Earthquakes ◽  
Weak Earthquakes ◽  
High Seismicity

<p>Proper seismic hazard assessment is the most important scientific problem of seismology, and geophysics in general. With the development of the world economy, the importance of the problem grows and acquires global significance.</p><p>Strong earthquakes (M ≥ M<sub>0</sub>, M<sub>0</sub> is the magnitude threshold starting from which earthquakes in the studied region are considered strong), as a rule, do not occur over the entire territory of the seismic region. Accordingly, the recognition of areas prone to future strong earthquakes is an urgent fundamental direction in research on the assessment of seismic hazard. Identification of potentially high seismicity zones in seismically active regions is important from both theoretical, and practical points of view. The currently available methods for recognition of high seismicity zones do not allow repeatedly correcting their results over time due to the invariability of the used set of recognition objects. In this work, a new system-analytical approach FCAZ (Formalized Clustering And Zoning) to the problem has been created. It uses the epicenters of rather weak earthquakes (M ≥ M<sub>R</sub>, M<sub>R</sub> is a certain magnitude threshold of weak earthquakes) as objects of recognition. This makes it possible to develop the recognition result of zones with increased seismic hazard after the appearance of new earthquake epicenters. The latter makes FCAZ a method of systems analysis.</p><p>The system-analytical method for analyzing geophysical data developed by the authors has led to the successful recognition of areas prone to the strongest, strong, and most significant earthquakes on the continents of North, and South America, Eurasia, and in the subduction zones of the Pacific Rim. At the same time, in particular, for the classical approach of strong earthquake-prone areas recognition EPA (Earthquake-Prone Areas), a new paradigm for recognition of high seismicity disjunctive nodes, and lineament intersections with training by one “reliable” class was created in the work.</p><p>In the regions studied in this work, FCAZ zones occupy a relatively small area compared to the field of general seismicity – 30% – 40% of the area of all seismicity, and 50% – 65% of the area where earthquakes with M ≥ M<sub>R</sub> occur. This illustrates the spatial nontriviality of the FCAZ results obtained in this work. The results of the work also show that weak seismicity can actually “manifest” the properties of geophysical fields, which in the classical EPA approach are used directly as characteristics of recognition objects (disjunctive nodes or intersections of the axes of morphostructural lineaments).</p><p>The reported study was funded by RFBR, project number 20-35-70054 «Systems approach to recognition algorithms for seismic hazard assessment».</p>

scholarly journals The Metano Modeling Toolbox MMTB: An Intuitive, Web-Based Toolbox Introduced by Two Use Cases

Metabolites ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 113
Author(s):  
Julia Koblitz ◽  
Sabine Will ◽  
S. Riemer ◽  
Thomas Ulas ◽  
Meina Neumann-Schaal ◽  
...  
Keyword(s):  
Metabolic Networks ◽  
Point Of View ◽  
Use Cases ◽  
Mathematical Methods ◽  
State Behavior ◽  
Web Based ◽  
Research Fields ◽  
Balance Analysis ◽  
Metabolic Models ◽  
User Friendly

Genome-scale metabolic models are of high interest in a number of different research fields. Flux balance analysis (FBA) and other mathematical methods allow the prediction of the steady-state behavior of metabolic networks under different environmental conditions. However, many existing applications for flux optimizations do not provide a metabolite-centric view on fluxes. Metano is a standalone, open-source toolbox for the analysis and refinement of metabolic models. While flux distributions in metabolic networks are predominantly analyzed from a reaction-centric point of view, the Metano methods of split-ratio analysis and metabolite flux minimization also allow a metabolite-centric view on flux distributions. In addition, we present MMTB (Metano Modeling Toolbox), a web-based toolbox for metabolic modeling including a user-friendly interface to Metano methods. MMTB assists during bottom-up construction of metabolic models by integrating reaction and enzymatic annotation data from different databases. Furthermore, MMTB is especially designed for non-experienced users by providing an intuitive interface to the most commonly used modeling methods and offering novel visualizations. Additionally, MMTB allows users to upload their models, which can in turn be explored and analyzed by the community. We introduce MMTB by two use cases, involving a published model of Corynebacterium glutamicum and a newly created model of Phaeobacter inhibens.

Do We Need the Replacement of YSI 2300? A View from the Clinical Laboratory

2021 ◽  
pp. 193229682110071
Author(s):  
Loukia Spanou ◽  
Konstantinos Makris
Keyword(s):  
Blood Glucose ◽  
Analytical Method ◽  
Clinical Laboratory ◽  
Glucose Monitoring ◽  
Point Of View ◽  
Blood Glucose Monitoring ◽  
Monitoring Systems ◽  
Comparator Method ◽  
Specific Device ◽  
Overall Performance

In this issue of Journal of Diabetes Science and Technology, Baumstark et al. evaluated the analytical performance of a bench-top laboratory glucose analyzer (SUPER-GL) intended for replacement for the YSI2300-STAT analyzer, that served for several decades as a comparator method in clinical and analytical studies of blood glucose monitoring systems (BGMS). The authors concluded that the SUPER-GL’s overall performance is comparable to that of YSI2300-STAT, and has the potential to be a candidate comparator analyzer. However, the question is if we need to recommend as a “comparator method,” a specific device, that measure glucose using the same analytical method with most BGMS. In this analysis we present our point of view hoping to generate a discussion on the necessity for such a replacement.

Genesis of volcanic rocks related to subduction zones; geochemical point of view

1977 ◽  
Vol S7-XIX (6) ◽  
pp. 1233-1243 ◽  
Author(s):  
C. Dupuy ◽  
J. Dostal ◽  
J. Vernieres
Keyword(s):  
Subduction Zones ◽  
Volcanic Rocks ◽  
Point Of View

scholarly journals The fully nonlinear stratified geostrophic adjustment problem

2017 ◽  
Vol 24 (1) ◽  
pp. 61-75 ◽  
Author(s):  
Aaron Coutino ◽  
Marek Stastna
Keyword(s):  
Stokes Equations ◽  
Wave Train ◽  
Shallow Water Equation ◽  
Classical Problem ◽  
Point Of View ◽  
Rossby Number ◽  
Adjustment Problem ◽  
Inertial Oscillations ◽  
Dispersive Waves ◽  
Fully Nonlinear

Abstract. The study of the adjustment to equilibrium by a stratified fluid in a rotating reference frame is a classical problem in geophysical fluid dynamics. We consider the fully nonlinear, stratified adjustment problem from a numerical point of view. We present results of smoothed dam break simulations based on experiments in the published literature, with a focus on both the wave trains that propagate away from the nascent geostrophic state and the geostrophic state itself. We demonstrate that for Rossby numbers in excess of roughly 2 the wave train cannot be interpreted in terms of linear theory. This wave train consists of a leading solitary-like packet and a trailing tail of dispersive waves. However, it is found that the leading wave packet never completely separates from the trailing tail. Somewhat surprisingly, the inertial oscillations associated with the geostrophic state exhibit evidence of nonlinearity even when the Rossby number falls below 1. We vary the width of the initial disturbance and the rotation rate so as to keep the Rossby number fixed, and find that while the qualitative response remains consistent, the Froude number varies, and these variations are manifested in the form of the emanating wave train. For wider initial disturbances we find clear evidence of a wave train that initially propagates toward the near wall, reflects, and propagates away from the geostrophic state behind the leading wave train. We compare kinetic energy inside and outside of the geostrophic state, finding that for long times a Rossby number of around one-quarter yields an equal split between the two, with lower (higher) Rossby numbers yielding more energy in the geostrophic state (wave train). Finally we compare the energetics of the geostrophic state as the Rossby number varies, finding long-lived inertial oscillations in the majority of the cases and a general agreement with the past literature that employed either hydrostatic, shallow-water equation-based theory or stratified Navier–Stokes equations with a linear stratification.

scholarly journals The Position of Heterodox Economics in Economic Science

2021 ◽  
Vol 66 (2) ◽  
pp. 275-290
Author(s):  
Eleonóra Matoušková
Keyword(s):  
Point Of View ◽  
Austrian School ◽  
Economic Science ◽  
Left Wing ◽  
Mathematical Methods ◽  
Heterodox Economics ◽  
Homo Economicus ◽  
Common Features ◽  
Economic Problems ◽  
Theoretical Approaches

In economic science dominate orthodox economics (mainstream economics respectively neoclassical economics). Despite its numerous intellectual failures, orthodox economics continue to prevail in teaching at universities. A certain alternative to orthodox economics is heterodox economics, which consists of three groups of theoretical approaches, represented by the Left-wing heterodoxy and Neo-Austrian school (we include them together in the Old heterodoxy) and the New heterodoxy. The objective of this article is to define the differences between orthodox economics and heterodox economics, to find common features of individual heterodox approaches and identify substantial differences between them and also highlight the relevance of these heterodox approaches from the point of view of the challenges we are facing today. A common characteristic of heterodoxy is the rejection of orthodoxy, especially its research methods. Heterodox economists reject the axiom that individuals are always rational, the concept of ‘homo economicus’, the application of a formal-deductive approach, the use of mathematical methods in cases that are not appropriate for this, and access from a closed system position. Heterodoxy is a very diverse theoretical tradition, and there are differences not only between the Left-wing heterodoxy, Neo-Austrian school and New heterodoxy, but also within these heterodox groups. They differ on specific topics they deal with and proposed solutions to socio-economic problems.

An introduction to the history of modern Persian Sufism, Part I: The Ni'matullāhī order: persecution, revival and schism

1998 ◽  
Vol 61 (3) ◽  
pp. 437-464 ◽  
Author(s):  
Leonard Lewisohn
Keyword(s):  
Religious Tradition ◽  
Point Of View ◽  
The Political ◽  
Religious Thought ◽  
Literature And Philosophy ◽  
Modern Period ◽  
Modern Development ◽  
Mystical Tradition ◽  
History Of ◽  
The Subject

Following the political upheavals of 1978, the history and development of Shiite religious thought in modern-day Persia has been the subject of detailed scholarly studies, but the modern development of Sufism—the mystical tradition that lies at the heart of traditional Persian culture, literature and philosophy, which is, from the cultural and literary point of view at least, the most fascinating aspect of the Perso-Islamic religious tradition—remains almost completely uncharted. In contrast to the classical and medieval periods of Persian Sufism which have undergone much scholarly investigation in recent years, the study of the modern period of Iranian tasawwuf, though far better known and documented, has been seriously neglected by scholars.

Analysis of Terms as an Instrument of Comparative Philosophy

2021 ◽  
Vol 13 (4-1) ◽  
pp. 139-153
Author(s):  
Nataliya Kanaeva ◽  
Keyword(s):  
Comparative Philosophy ◽  
Indian Philosophy ◽  
Classical Problem ◽  
Round Table ◽  
Point Of View ◽  
Logical Analysis ◽  
Modern Times ◽  
Epistemic Culture ◽  
Epistemic Cultures ◽  
Philosophical Texts

The article continues the polemics on the problems of interaction of philosophical cultures in the era of globalization, which was started at the meetings of the Round Table "Geography of Rationality". The author gives answers to critical questions, explains the methodology and principles of her work with Indian philosophical texts. A short research of the meta-term "cognitive subject" is an example of her methods. The analysis of cognitive subject aimed to justify the absence of the concepts of reason and rationality in Indian epistemic culture, the cornerstones of Western epistemic culture, since Modern times. The justification was carried out by comparing the generalized model of the cognitive subject, abstracted from the writings of empiricists and rationalists of the XVII–XVIII centuries, with the generalized models of the cognitive subject, reconstructed on the basis of authoritative writings of three variants of Indian epistemological teachings: Advaita Vedānta, Jainism and Buddhism. From the author's point of view, the absence of the concepts of reason and rationality in India leads to the non-classical problem of pluralism of epistemic cultures, and the exploration of the meta-term "cognitive subject" allows us to find, on the one hand, intersections in the contents of epistemologies in Indian philosophy and Western metaphysics of Modern times, and on the other, their incompatible contents, which are specific manifestations of pluralism of epistemic cultures. For her reconstruction of the cognitive subject models the author takes the principle of "double perspective" in combination with the methods of hermeneutical and logical analysis of philosophical terms. The principle determinates the consideration of the theoretical object from two sides: European and Indian. Having appeared in the Western epistemic culture, these methods effectively work to objectify the results of socio-humanitarian research, thanks to which they are becoming increasingly widespread among non-Western cross-cultural philosophers. When the author applies the method of logical analysis to justify the absence of the concepts of reason and rationality in India, she is guided by the rules of logical semantics and the principles of semiotics. The compared terms, Western and Indian, are considered as signs with their own meanings and senses. The senses are understood as sets of predicates important for solving the author’s task. The author of the article, taking into account the experience of famous philosophers, negatively assesses the possibility of solving the problem of unambiguously correct translation.

scholarly journals Simple Approximate Formulas for Postbuckling Deflection of Heavy Elastic Columns

2020 ◽  
Vol 10 (20) ◽  
pp. 7163
Author(s):  
Hiroyuki Shima
Keyword(s):  
Mathematical Expression ◽  
Point Of View ◽  
Mathematical Methods ◽  
Concentrated Load ◽  
Combined Loads ◽  
Living Things ◽  
Buckling Behavior ◽  
Post Buckling ◽  
Analytical Formulas ◽  
Elastic Column

Columnar buckling is a ubiquitous phenomenon that occurs in both living things and man-made objects, regardless of the length scale ranging from macroscopic to nanometric structures. In general, analyzing the post-buckling behavior of a column requires the application of complex mathematical methods because it involves nonlinear problem solving. To complement these complex methods, this study presents simple analytical formulas for the large deflection of a heavy elastic column under combined loads. The analytical formulas relate the concentrated load acting on the tip of the column, the column’s own weight, and the deflection angle of the column through a simple mathematical expression. This can assist in obtaining an overall picture of the post-buckling behavior of heavy columns from an application point of view.

scholarly journals Towards an algorithmic synthesis of thermofluid systems

2020 ◽  
Author(s):  
Jonas B. Weber ◽  
Michael Hartisch ◽  
Alexander D. Herbst ◽  
Ulf Lorenz
Keyword(s):  
Heat Transfer ◽  
Design Process ◽  
Practical Experience ◽  
Point Of View ◽  
Fluid Distribution ◽  
Develop Model ◽  
Mathematical Methods ◽  
High Rise ◽  
Fluid Systems ◽  
Technical Systems

Abstract Individual technical components are usually well optimized. However, the design process of entire technical systems, especially in its early stages, is still dominated by human intuition and the practical experience of engineers. In this context, our vision is the widespread availability of software tools to support the human-driven design process with the help of modern mathematical methods. As a contribution to this, we consider a selected class of technical systems, so-called thermofluid systems. From a technical point of view, these systems comprise fluid distribution as well as superimposed heat transfer. Based on models for simple fluid systems as extensively studied in literature, we develop model extensions and algorithmic methods directed towards the optimized synthesis of thermofluid systems to a practical extent. Concerning fluid systems, we propose a Branch-and-Bound framework, exploiting problem-specific characteristics. This framework is then further analyzed using the application example of booster stations for high-rise buildings. In addition, we demonstrate the application of Quantified Programs to meet possible resilience requirements with respect to the systems generated. In order to model basic thermofluid systems, we extend the existing formulation for fluid systems by including heat transfer. Since this consideration alone is not able to deal with dynamic system behavior, we face this challenge separately by providing a more sophisticated representation dealing with the temporal couplings that result from storage components. For the considered case, we further show the advantages of this special continuous-time representation compared to the more common representation using discrete time intervals.

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