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Quality Diversity under Sparse Interaction and Sparse Reward: Application to Grasping in Robotics.
Evol Comput
January 2025
Sorbonne Université, CNRS, ISIR., Paris, 75005, France
Quality-Diversity (QD) methods are algorithms that aim to generate a set of diverse and highperforming solutions to a given problem. Originally developed for evolutionary robotics, most QD studies are conducted on a limited set of domains'mainly applied to locomotion, where the fitness and the behavior signal are dense. Grasping is a crucial task for manipulation in robotics.
View Article and Find Full Text PDFNeophobia and exploration behavior in urban gulls: the Kelp Gulls (Larus dominicanus) as a study case.
Behav Processes
January 2025
Instituto de Investigaciones Marinas y Costeras (IIMyC), Facultad de Ciencias Exactas y Naturales (FCEyN), Universidad Nacional de Mar del Plata - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Juan B. Justo 2550, B7608FBY, Mar del Plata, Argentina. Electronic address:
Neophobia and exploratory behavior are personality traits through which organisms evaluate and respond to environment changes by adjusting their behavior. The Kelp Gull (Larus dominicanus) is a generalist seabird that consumes a wide variety of prey. Neophobia levels and exploratory behavior in novel circumstances were analyzed in urban adult (n=13) and immature (n=15) Kelp Gulls captured in the landfill of Mar del Plata city.
View Article and Find Full Text PDFHow age and culture impact the neural correlates of memory retrieval.
Cogn Affect Behav Neurosci
January 2025
Department of Psychology, Brandeis University, Waltham, MA, USA.
Culture can shape memory, but little research has investigated age effects. The present study examined the neural correlates of memory retrieval for old, new, and similar lures in younger and older Americans and Taiwanese. A total of 207 participants encoded pictures of objects and, during fMRI scanning, completed a surprise object recognition task testing discrimination of similar and new from old items.
View Article and Find Full Text PDFExtended Reality to Assess Short-Term Spatial Memory-A Comparative Study of Mixed Reality, Augmented Reality, and Virtual Reality.
Sensors (Basel)
December 2024
Instituto Universitario de Automática e Informática Industrial, Universitat Politècnica de València, C/Camino de Vera, s/n, 46022 Valencia, Spain.
A Mixed Reality (MR) application using an optical see-through headset was developed to assess short-term spatial memory. A study with 29 participants was conducted. Data from this study were compared to two previous studies using mobile Augmented Reality (AR) and Virtual Reality (VR) with headsets.
View Article and Find Full Text PDFChess-like Pieces Realized by Selective Laser Sintering of PA12 Powder: 3D Printing and Micro-Tomographic Assessment.
Polymers (Basel)
December 2024
Department of Applied Science and Technology (DISAT), Politecnico di Torino, Corso Duca Degli Abruzzi 24, 10129 Torino, Italy.
The paper highlights the realization of 3D-printed parts with complex geometries, such as chess-like pieces, using polyamide 12 (PA12) as polymeric powder via selective laser sintering (SLS). The research activity focuses on the study of the powder printability, the optimization of the printing parameters, and the tomographic evaluation of the printed objects. Morphological analyses were carried out to study the PA12 powder microstructure considering that SLS required specific particle size distribution and shape, able to guarantee a good flowability necessary to take part in a sintering process.
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