MODELING CROWD DYNAMICS FROM A COMPLEX SYSTEM VIEWPOINT

2012 ◽  
Vol 22 (supp02) ◽  
pp. 1230004 ◽  
Author(s):  
NICOLA BELLOMO ◽  
BENEDETTO PICCOLI ◽  
ANDREA TOSIN
Keyword(s):  
Mathematical Modeling ◽  
Complex System ◽  
The Other ◽  
Living Systems ◽  
Self Organization ◽  
Mathematical Structures ◽  
Crowd Dynamics ◽  
Research Perspectives ◽  
The One ◽  
Critical Overview

This paper aims at indicating research perspectives on the mathematical modeling of crowd dynamics, pointing on the one hand to insights into the complexity features of pedestrian flows and on the other hand to a critical overview of the most popular modeling approaches currently adopted in the specialized literature. Particularly, the focus is on scaling problems, namely representation and modeling at microscopic, macroscopic, and mesoscopic scales, which, entangled with the complexity issues of living systems, generate multiscale dynamical effects, such as e.g. self-organization. Mathematical structures suitable to approach such multiscale aspects are proposed, along with a forward look at research developments.

scholarly journals The Good, the Bad and the Ugly? The Dynamic Interplay Between Educational Practice, Policy and Research

2014 ◽  
Vol 11 (2) ◽  
Author(s):  
Paul Van Geert ◽  
Henderien Steenbeek
Keyword(s):  
Complex System ◽  
Educational Practice ◽  
The Other ◽  
Self Organization ◽  
Other Hand ◽  
The Creation ◽  
Characteristic Features ◽  
The One ◽  
Dynamic Interplay ◽  
Interacting Components

The notion of complexity — as in “education is a complex system” — has two different meanings. On the one hand, there is the epistemic connotation, with “Complex” meaning “difficult to understand, hard to control”. On the other hand, complex has a technical meaning, referring to systems composed of many interacting components, the interactions of which lead to self organization and emergence. For agents, participating in a complex system such as education, it is important that they can reduce the epistemic complexity of the system, in order to allow them to understand the system, to accomplish their goals and to evaluate the results of their activities. We argue that understanding, accomplishing and evaluation requires the creation of simplex systems, which are praxis-based forms of representing complexity. Agents participating in the complex system may have different kinds of simplex systems governing their understanding and praxis. In this article, we focus on three communities of agents in education — educators, researchers and policymakers — and discuss characteristic features of their simplex systems. In particular, we focus on the simplex system of educational researchers, and we discuss interactions — including conflicts or incompatibilities — between their simplex systems and those of educators and policymakers. By making some of the underlying features of the educational researchers’ simplex systems more explicit – including the underlying notion of causality and the use of variability as a source of knowledge — we hope to contribute to clarifying some of the hidden conflicts between simplex systems of the communities participating in the complex system of education.

Towards the explication of the universals of the Russian language personality on the model of the associative-verbal network

2021 ◽  
pp. 314-329
Author(s):  
Irina V. Shaposhnikova ◽  
Keyword(s):  
Russian Language ◽  
The Other ◽  
Semantic Field ◽  
Narrow Sense ◽  
Regional Variability ◽  
Research Perspectives ◽  
Gradual Accumulation ◽  
Verbal Processes ◽  
The One ◽  
The Russian Language

The study of the universals of the Russian language personality on the model of the associative-verbal network (AVN) proceeds from ontological and epistemological aspects. Ontologically the AVN “inherits” a number of functional properties from the human cognitome hypernetwork. Along with the dissipation of grammar and stochastic formation of the vectors of associative dominants, they can be attributed to universals in the narrow sense of the word (ultimately due to the evolutionary biological specifics of the species). On the one hand, the dissipated character of grammar in the AVN and stochasticity of the emergence of meaningful vectors impose epistemological restrictions on the methods used to study the AVN phenomena. On the other hand, the gradual accumulation of the new Russian corpora of verbal associations opens a window of research perspectives for studying culturally imposed universals of the Russian language personality in current diachrony with reference to ethno-social and regional variability. The formalization of associative-verbal processes is associated with methods of explicating grammar (dissipated in AVN) and its role in the emergent meaning-formation. The author’s techniques of working with the AVN of the Russian language personality on the latest experimental materials (the database SIBAS and its subcorpora) are aimed at explicating the associative profiles of lexico-grammatical phenomena and their relevance for the analysis of the universals in a broad sense of the term, the associative dominants creating a unified but dynamic with their fluctuations semantic field of the personality’s verbal culture.

Modeling virus pandemics in a globally connected world a challenge towards a mathematics for living systems

2021 ◽  
pp. 1-7
Author(s):  
N. Bellomo ◽  
F. Brezzi ◽  
M. A. J. Chaplain
Keyword(s):  
Complex System ◽  
Population Dynamics ◽  
Mathematical Models ◽  
Modeling And Simulation ◽  
Critical Analysis ◽  
Living Systems ◽  
Special Issue ◽  
Research Perspectives ◽  
Heterogeneous Features

This editorial paper presents the papers published in a special issue devoted to the modeling and simulation of mutating virus pandemics in a globally connected world. The presentation is proposed in three parts. First, motivations and objectives are presented according to the idea that mathematical models should go beyond deterministic population dynamics by considering the multiscale, heterogeneous features of the complex system under consideration. Subsequently, the contents of the papers in this issue are presented referring to the aforementioned complexity features. Finally, a critical analysis of the overall contents of the issue is proposed, with the aim of providing a forward look to research perspectives.

scholarly journals ГРОМАДСЬКІСТЬ МІСТА ЯК КОЛЕКТИВНИЙ СУБ’ЄКТ СОЦІАЛЬНОЇ ДИНАМІКИ

2020 ◽  
pp. 13-16
Author(s):  
Mikhno Nadiya
Keyword(s):  
Social Movements ◽  
Social Change ◽  
The Other ◽  
Self Organization ◽  
New Social Movements ◽  
Cognitive Analysis ◽  
Current Trends ◽  
Urban Activism ◽  
The One

The article deals with the phenomenon of urban activism as a manifestation of «grassroots» self-organization of city dwellers. The logic of the emergence of the centers of urban activism in the postmodern cultural situation has been determined, which is marked by the processes of deconstruction of the principles of modernity, in particular the principle of universal rationality. The possibility of conceptual arrangement and cognitive analysis of urban activism through the lens of the study of «new social movements», which is, on the one hand, a catalyst for social change, and on the other, a representation of current trends of postmodernism.

scholarly journals ON THE PROBLEM OF INVOLVING TEACHERS IN RESEARCH ACTIVITIES

2021 ◽  
pp. 92-96
Author(s):  
Светлана Ивановна Поздеева
Keyword(s):  
Professional Training ◽  
Educational Process ◽  
The Other ◽  
Self Organization ◽  
Educational Content ◽  
Educational Innovations ◽  
Research Activities ◽  
The One ◽  
The University ◽  
High Degree

Ставится вопрос о том, как вовлекать преподавателей педагогического университета в исследовательскую деятельность и применять результаты этой деятельности в образовательном процессе вуза. Показано, чем вовлеченность как высшее проявление субъектности человека отличается от активности. Выделены два уровня вовлеченности: уровень участия в деятельности и уровень влияния на ее содержание, протекание и результаты. Обоснованы сложности, возникающие у преподавателя, который пытается продолжать заниматься наукой после защиты диссертации. Это противоречие между высокой степенью исследовательской свободы и автономности, с одной стороны, и необходимостью ответственности и самоорганизации в исследовательском поиске – с другой. Выделены факторы, определяющие вовлеченность в исследование: исследовательская «зоркость», участие в образовательных инновациях и изучение их эффектов, постоянная обратная связь педагога со студентами для корректировки профессиональных проб и усиления их образовательных результатов. Делается вывод о необходимости и возможности преподавателей влиять на формирование актуальной научной повестки и тем самым обогащать образовательное содержание профессиональной подготовки будущих педагогов. The question is raised about how to involve teachers of a pedagogical University in research activities and apply the results of this activity in the educational process of the University. It is shown how involvement as the highest manifestation of human subjectivity differs from activity. Two levels of involvement are identified: the level of participation in the activity and the level of influence on its content, course and results. The author substantiates the difficulties that arise for a teacher who tries to continue studying science after defending his dissertation. This is a contradiction between a high degree of research freedom and autonomy, on the one hand, and the need for responsibility and self-organization in research search, on the other. The factors that determine involvement in research are highlighted: research “vigilance”, participation in educational innovations and studying their effects, constant feedback from the teacher with students to adjust professional tests and enhance their educational results. The author draws attention to the fact that one’s own research trajectory can be interpreted as a kind of educational trajectory of a University teacher. It is concluded that it is necessary and possible for teachers to influence the formation of a relevant scientific agenda for them and thereby enrich the educational content of professional training of future teachers.

scholarly journals Prediction of the propagation of SARS-CoV-2 in Amapá State, Amazon Region, Brazil, by mathematical modeling

2020 ◽  
pp. 73-95
Author(s):  
Neylan Leal Dias ◽  
Edcarlos Vasconcelos da Silva ◽  
Marcelo Amanajas Pires ◽  
Daniel Chaves ◽  
Katsumi Letra Sanada ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Temporal Evolution ◽  
Sir Model ◽  
Amazon Region ◽  
The Other ◽  
Short Term ◽  
Exponential Behavior ◽  
Linear Projection ◽  
The Third ◽  
The One

This article presents an analysis of the spread of SARS-CoV-2 in Amapá using three approaches. In the first, the ICL model for the pandemic applied to Brazil was used to implement a comparative linear projection for the Amapá population. The second approach was developed with the short-term solution of the standard SIR model where it was shown that the typical exponential behavior satisfactorily describes the data for the first weeks of the epidemic, but soon after there are early discrepancies due to a sudden slowdown in the temporal evolution number of cases due to isolation measures. This new regime is appropriately described with the third approach which is based on the vSIR model which is a variant of the SIR model. The results presented enable, on the one hand, a better understanding of the scenarios already faced by the population and on the other hand provide short-term projections that will be constantly updated on the link[11].

Solution or Imitation?

2019 ◽  
pp. 147-173
Author(s):  
Johannes Lenhard
Keyword(s):  
Complex System ◽  
Computer Model ◽  
Numerical Solutions ◽  
The Other ◽  
Theoretical Understanding ◽  
John Von Neumann ◽  
Von Neumann ◽  
Norbert Wiener ◽  
The One ◽  
The Relationship

This chapter distinguishes two fundamental but opposing conceptions of simulation. The first conception conceives simulations as numerical solutions of equations. The second approach does not involve the concept of solution, but takes simulation as the imitation of the behavior of a complex system by a computer model. This chapter claims that simulation modeling combines both conceptions. Large parts of the sciences involve a compromise (in one way or another) between two diverging forces. Theoretical understanding and epistemic quality stand on the one side; applicability and tractability on the other. What is interesting about simulation is the way in which a balance is achieved—that is, how the conflicting types are combined. The chapter analyzes the relationship between the simulation pioneers John von Neumann, who advocated the solution, and Norbert Wiener, who advocated the imitation concept.

scholarly journals Interaction Between the Transport Network and the Territory of Algiers (Complex System): In Search of Indicators

2021 ◽  
Vol 11 (2) ◽  
pp. 77-92
Author(s):  
Nour El Houda Baba Slimane ◽  
Tahar Baouni
Keyword(s):  
Complex System ◽  
Urban Planning ◽  
Transport Network ◽  
The Other ◽  
Sustainable Mobility ◽  
Efficient Tool ◽  
Input And Output ◽  
Effectiveness And Efficiency ◽  
The One ◽  
Output Indicators

Abstract In recent years and within the framework of its project “Algiers the metropolis”, Algiers has classified its transport network among its first concerns in order to compete with the other Mediterranean metropolises. However, the complexity of its territory, which is of a particular geological and geomorphological nature, represents a constraint for the proper distribution and management of its transport network. The complexity of its territory and of its transport network, leads us towards the systemic approach for the search of an adequacy between these two complex urban realities in order to find an effective and efficient tool of management and urban planning. The development of a set of indicators of sustainable mobility, as a result of this work, allowed us to find through an epistemological study of the literature on the two complex concepts to select and develop a list of Input and Output Indicators that are related to both territory and transport. Indeed, this list of sustainable mobility indicators will allow, on the one hand, in urban planning, a better match of the transport network to the Algerian territory and, on the other hand, the study of the effectiveness and efficiency of the present and future transport network.

scholarly journals A note on biorhetorics

2001 ◽  
Vol 29 (2) ◽  
pp. 693-704
Author(s):  
Kalevi Kull
Keyword(s):  
Logical Consequence ◽  
The Other ◽  
Living Systems ◽  
Other Hand ◽  
Social Animals ◽  
Recent Developments ◽  
The One

This article analyses the possibility to look at living systems as biorhetorical systems. Rhetorics of biology, which studies the rhetoric of biological discourse, is distinguishable from biorhetorics, which attempts to analyse the expressive behaviour of organisms in terms of primordial (unconscious) rhetoric. The appearance of such a view is a logical consequence from recent developments in new (or general) rhetorics on the one hand (e.g., G. A. Kennedy's claim that rhetoric exists among social animals), and from the biosemiotic approach to living systems on the other hand.

scholarly journals Epistemic Communities in Urban Self-organization

2018 ◽  
Vol 33 (3) ◽  
pp. 310-328 ◽  
Author(s):  
Ewald de Bruijn ◽  
Lasse Gerrits
Keyword(s):  
Systematic Review ◽  
Urban Planning ◽  
Qualitative Methods ◽  
Economic Geography ◽  
Urban Growth ◽  
The Other ◽  
Epistemic Communities ◽  
Self Organization ◽  
The One ◽  
Over Time

The application of the concept of self-organization has grown over time in the field of urban planning, but with various interpretations. This article presents a systematic review that aims to uncover whether different uses of self-organization are tied to epistemic communities. Through coding and bibliographical analysis, it became apparent that there are two epistemic communities that emphasize different conceptualizations of self-organization. They investigate different issues, use different methods, and find different results. At the one hand, authors use self-organization in modeling approaches, particularly revolving around topics such as economic geography and urban growth. At the other hand, authors use self-organization as surrogate for self-governance, often studied with qualitative methods.

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