Benjamin De Bari

Dr. Benjamin De Bari

Department of Psychology, Lehigh University, Bethlehem, PA 18015, USA
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Research Focus & Metrics

Academic Career Length

8Years (2019-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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16 November 2020 in Entropy
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Journal Article
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DKDilip Kondepudi
Dilip Kondepudi
BBBenjamin De Bari
Benjamin De Bari
James DixonJames Dixon
James Dixon
Self-organization in nonequilibrium systems has been known for over 50 years. Under nonequilibrium conditions, the state of a system can become unstable and a transition to an organized structure can occur. Such structures include oscillating chemical reactions and spatiotemporal patterns in chemical and other systems. Because entropy and free-energy dissipating irreversible processes generate and maintain these structures, these have been called dissipative structures. Our recent research revealed that some of these structures exhibit organism-like behavior, reinforcing the earlier expectation that the study of dissipative structures will provide insights into the nature of organisms and their origin. In this article, we summarize our study of organism-like behavior in electrically and chemically driven systems. The highly complex behavior of these systems shows the time evolution to states of higher entropy production. Using these systems as an example, we present some concepts that give us an understanding of biological organisms and their evolution.

14 April 2022 in Fluids
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BCBong Jae Chung
Bong Jae Chung
BBBenjamin De Bari
Benjamin De Bari
James DixonJames Dixon
James Dixon
DKDilip Kondepudi
Dilip Kondepudi
JPJoseph Pateras
Joseph Pateras
Ashwin VaidyaAshwin Vaidya
Ashwin Vaidya
In this paper, we discuss some well-known experimental observations on self-organization in dissipative systems. The examples range from pure fluid flow, pattern selection in fluid–solid systems to chemical-reaction-induced flocking and aggregation in fluid systems. In each case, self-organization can be seen to be a function of a persistent internal gradient. One goal of this article is to hint at a common theory to explain such phenomena, which often takes the form of the extremum of some thermodynamic quantity, for instance the rate of entropy production. Such variational theories are not new; they have been in existence for decades and gained popularity through the Nobel Prize-winning work of theorists such as Lars Onsager and Ilya Prigogine. The arguments have evolved since then to include systems of higher complexity and for nonlinear systems, though a comprehensive theory remains elusive. The overall attempt is to bring out examples from physics, chemistry, engineering, and biology that reveal deep connections between variational principles in physics and biological, or living systems. There is sufficient evidence to at least raise suspicion that there exists an organization principle common to both living and non-living systems, which deserves deep attention.

29 May 2019 in PLOS ONE
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BBBenjamin De Bari
Benjamin De Bari
JDJames Dixon
James Dixon
BKBruce Kay
Bruce Kay
DKDilip Kondepudi
Dilip Kondepudi
Physical systems open to a flow of energy can exhibit spontaneous symmetry breaking and self-organization. These nonequilibrium self-organized systems are known as dissipative structures. We study the oscillatory mode of an electrically driven dissipative structure. Our system consists of aluminum beads in shallow oil, which, when subjected to a high voltage, self-organize into connected ‘tree’ structures. The tree structures serve as pathways for the conduction of charge to ground. This system shows a variety of spatio-temporal behaviors, such as oscillating movement of the tree structures. Utilizing a dynamical systems model of the electromagnetic phenomena, we explore a potential mechanism underlying the system’s behavior and use the model to make additional empirical predictions. The model reproduces the oscillatory behavior observed in the real system, and the behavior of the real system is consistent with predictions from the model under various constraints. From the empirical results and the mathematical model, we observe a tendency for the system to select modes of behavior with increased dissipation, or higher rates of entropy production, in accord with the proposed Maximum Entropy Production (MEP) Principle.

21 September 2020 in Ecological Psychology
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Closed access
BBBenjamin De Bari
Benjamin De Bari
DKDilip K. Kondepudi
Dilip K. Kondepudi
BKBruce A. Kay
Bruce A. Kay
JDJames A. Dixon
James A. Dixon
Physical systems maintained far from equilibrium exhibit self-organization of structure and behavior. These dissipative structures can exhibit life-like qualities and activities, such as collective and coordinated behaviors. We review such collective behaviors in electrical and chemical dissipative structures. Electrical dissipative structures can functionally coordinate their behaviors to maximize the rate of entropy production. Coupled oscillating electrical dissipative structures exhibit in-phase and anti-phase coordinative modes characteristic of biological coupled oscillators. Chemical swimmers form collective flocks with emergent properties, including sensitivities to magnetic and thermal fields, and rudimentary navigational capabilities. We review previously published work on electrical and chemical dissipative structures in the context of functional coordination. We also present a novel study of the functional coordination within the electrical dissipative structure. These collective behaviors are enabled by coupling of dissipative entities through diffuse energetic fields. We propose that the causal structure of the physics underlying these collective phenomena may be the same as that supporting coordination between organisms. We draw analogies between thermodynamic forces and flows driving the non-living dissipative structures and the perception–action mutuality which supports biological behavior.

15 May 2021 in Entropy
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Journal Article
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BBBenjamin De Bari
Benjamin De Bari
APAlexandra Paxton
Alexandra Paxton
DKDilip Kondepudi
Dilip Kondepudi
BKBruce A. Kay
Bruce A. Kay
James DixonJames Dixon
James Dixon
Coordination within and between organisms is one of the most complex abilities of living systems, requiring the concerted regulation of many physiological constituents, and this complexity can be particularly difficult to explain by appealing to physics. A valuable framework for understanding biological coordination is the coordinative structure, a self-organized assembly of physiological elements that collectively performs a specific function. Coordinative structures are characterized by three properties: (1) multiple coupled components, (2) soft-assembly, and (3) functional organization. Coordinative structures have been hypothesized to be specific instantiations of dissipative structures, non-equilibrium, self-organized, physical systems exhibiting complex pattern formation in structure and behaviors. We pursued this hypothesis by testing for these three properties of coordinative structures in an electrically-driven dissipative structure. Our system demonstrates dynamic reorganization in response to functional perturbation, a behavior of coordinative structures called reciprocal compensation. Reciprocal compensation is corroborated by a dynamical systems model of the underlying physics. This coordinated activity of the system appears to derive from the system’s intrinsic end-directed behavior to maximize the rate of entropy production. The paper includes three primary components: (1) empirical data on emergent coordinated phenomena in a physical system, (2) computational simulations of this physical system, and (3) theoretical evaluation of the empirical and simulated results in the context of physics and the life sciences. This study reveals similarities between an electrically-driven dissipative structure that exhibits end-directed behavior and the goal-oriented behaviors of more complex living systems.

18 April 2024 in BioSystems
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Journal Article
Closed access
BBBenjamin De Bari
Benjamin De Bari
DKDilip K. Kondepudi
Dilip K. Kondepudi
AVAshwin Vaidya
Ashwin Vaidya
JDJames A. Dixon
James A. Dixon