24 papers · ranked by Valyu relevance
David Howard, Kyrre Glette, Nick Cheney
Morphological adaptation is a key challenge for Evolutionary Robotics ([1]; [4]), and robotics in general. Consideration of a robot’s physical form in addition to its control system holds particular promise for imbuing robotic systems with task and environmental adaptability ([17]; [12]). The additional degrees of…
Dominic K. Devlin, Austen R. D. Ganley, Nobuto Takeuchi, Lin Wan
Morphogenesis of complex body shapes is reproducible despite the noise inherent in the underlying morphogenetic processes. However, how these morphogenetic processes work together to achieve this reproducibility remains unclear. Here, we ask how this reproducibility is achieved by evolving complex morphologies in a…
Ian G. Brennan, David G. Chapple, J. Scott Keogh, Stephen Donnellan
Animal phenotypes evolve and diverge as a result of differing selective pressures and drift. These processes leave unique signatures in patterns of trait evolution, impacting the tempo and mode of morphological macroevolution. While there is a broad understanding of the history of some organismal traits (e.g. body…
Joshua E. Auerbach, Josh C. Bongard, Olaf Sporns
Whether, when, how, and why increased complexity evolves in biological populations is a longstanding open question. In this work we combine a recently developed method for evolving virtual organisms with an information-theoretic metric of morphological complexity in order to investigate how the complexity of…
Pascal F. Hagolani, Roland Zimm, Renske Vroomans, Isaac Salazar-Ciudad + 1 more
'Isaac Salazar-Ciudad' 'Inna Lavrik'] How does morphological complexity evolve? This study suggests that the likelihood of mutations increasing phenotypic complexity becomes smaller when the phenotype itself is complex. In addition, the complexity of the genotype-phenotype map (GPM) also increases with the phenotypic…
Ian G. Brennan, Natalie Cooper, Joanna Sumner, Sarin Tiatragul + 4 more
The adaptive landscape is a flexible concept in biology which helps map entities onto an eco-evolutionary topography. A common practice is clustering species to identify adaptive peaks but the pathways that allow movement into new adaptive zones remain poorly understood. Here we integrate new sequence-capture (>5,000…
A. Goswami, J. B. Smaers, C. Soligo, P. D. Polly
Phenotypic integration is a pervasive characteristic of organisms. Numerous analyses have demonstrated that patterns of phenotypic integration are conserved across large clades, but that significant variation also exists. For example, heterochronic shifts related to different mammalian reproductive strategies are…
Jie Luo, Aart C. Stuurman, Jakub M. Tomczak, Jacintha Ellers + 1 more
'A. E. Eiben'] Simultaneously evolving morphologies (bodies) and controllers (brains) of robots can cause a mismatch between the inherited body and brain in the offspring. To mitigate this problem, the addition of an infant learning period by the so-called Triangle of Life framework has been proposed relatively long…
Jie Luo, Daan Zeeuwe, A. E. Eiben
—When controllers (brains) and morphologies (bodies) of robots simultaneously evolve, this can lead to a problem, namely the brain & body mismatch problem. In this research, we propose a solution of lifetime learning. We set up a system where modular robots can create offspring that inherit the bodies of parents by…
Paolo Pagliuca, Stefano Nolfi
We introduce a method that permits to co-evolve the body and the control properties of robots. It can be used to adapt the morphological traits of robots with a hand-designed morphological bauplan or to evolve the morphological bauplan as well. Our results indicate that robots with co-adapted body and control traits…
Elliot M. Butterworth, Tim Rogers, Matthew A. Wills
Attempts to quantify biological complexity often consider intrinsic structural properties at a chosen hierarchical level and resolution, such as counts of body parts and their degree of differentiation. These measures are inherently \emph{syntactic}, being concerned with the information needed to specify an arrangement…
Isaac Salazar-Ciudad
The concept of developmental constraints has been central to understand the role of development in morphological evolution. Developmental constraints are classically defined as biases imposed by development on the distribution of morphological variation. This opinion article argues that the concepts of developmental…
Xiaoni Xu, Rossy Natale
Complex morphological structures, such as skulls or limbs, are often composed of multiple morphological components (e.g. bones, sets of bones) that may evolve in a covaried manner with one another. Previous research has reached differing conclusions on the number of semi-independent units, or modules, that exist in the…
Authors not listed
To pave way for application of Li-metal anodes in high energy density batteries the evolution of the 3D structures formed during charging needs accurate characterization inside working cells. The growth of porous, weakly connected structures is directly linked to the poor cycle life of Li-metal batteries. Here, we…
Dominic K Devlin, Austen RD Ganley, Nobuto Takeuchi
Morphogenesis of complex body shapes is reproducible despite the noise inherent in the underlying morphogenetic processes. However, how these morphogenetic processes work together to achieve this reproducibility remains unclear. Here, we ask how morphogenetic reproducibility is realised by developing a computational…
Authors not listed
Single-chain nanoparticles (SCNPs) are a class of materials formed by the intramolecular cross-linking and collapse of single polymer chains. Because their morphology dictates suitability for specific applications, such as nanoscale reactors and drug delivery vehicles, understanding how to control or tailor…
Caroline Rossi-Gendron, Farah El Fakih, Koyomi Nakazawa, Léa Chocron + 5 more
Self-assembly is both an advantageously spontaneous process to organize molecular or colloidal entities into synthetic functional superstructures and a key-feature of how life builds its components. However, compared to their living counterparts, synthetic materials made by self-assembly usually lack some of the…
Joel Dokmegang, Emmanuel Faure, Patrick Lemaire, Ed Munro + 1 more
Describing morphogenesis generally consists in aggregating the multiple high resolution spatiotemporal processes involved into repeatable low dimensional morphological processes consistent across individuals of the same species or group. In order to achieve this goal, biologists often have to submit movies issued from…
Loizos Kounios, Jeff Clune, Kostas Kouvaris, Günter P. Wagner + 3 more
'Mihaela Pavličev' 'Daniel Weinreich' 'Richard A. Watson'] It has been hypothesized that one of the main reasons evolution has been able to produce such impressive adaptations is because it has improved its own ability to evolve – "the evolution of evolvability". Rupert Riedl, for example, an early pioneer of…
Authors not listed
RNA droplets assembled from co-transcriptionally folded nanostructures have recently emerged as a promising platform for constructing protocells and minimal synthetic cell models. In these systems, a custom-designed DNA template encodes an RNA nanostar, which is produced by transcription and self-assembles into…
Vivek Singh, Yishay Feldman, Gregory Leitus, Vlad Brumfeld + 3 more
We demonstrate here how nitrate salts of bivalent copper, nickel, cobalt, and manganese, along with an achiral organic ligand, assemble into various structures such as symmetrical double-decker flowers, smooth elongated hexagonal bipyramids, and hexagonal prisms. Large morphological changes occur in these structures…
Authors not listed
Vertex models have been established as powerful tools for the cell-based simulation of epithelial tissues as they allow a detailed description of their mechanical development with respect to the properties of individual cells. Thus, they suit the challenges of simulating intestinal organoids which arise from the…
Carl Simpson
The mere existence of speciation and extinction make macroevolutionary processes possible. Speciation and extinction introduce discontinuities in the microevolutionary change within lineages by initiating, disrupting, and terminating the continuity of species lineages. Within a clade, speciation and extinction become…
Maria Chiara di Gregorio, Vivek Singh, Linda J. W. Shimon, Michal Lahav + 1 more
The symmetry of a crystal’s morphology usually reflects the symmetry of the crystallographic packing. For single-crystals, the space and point groups allow only a limited number of mathematical descriptions of the morphology (forms), all of which are convex polyhedrons. In contrast, concave polyhedrons are a hallmark…