24 papers · ranked by Valyu relevance
Yuhao Kang, Kunlin Wu, Song Gao, Ignavier Ng + 4 more
'Fan Zhang' 'Teng Fei'] Spatial clustering has been widely used for spatial data mining and knowledge discovery. An ideal multivariate spatial clustering should consider both spatial contiguity and aspatial attributes. Existing spatial clustering approaches may face challenges for discovering repeated geographic…
William Hockeimer, Ruo-Yah Lai, Maanasa Natrajan, William Snider + 3 more
'James J Knierim' 'Lisa M Giocomo' 'Laura L Colgin'] The hippocampus is believed to encode episodic memory by binding information about the content of experience within a spatiotemporal framework encoding the location and temporal context of that experience. Previous work implies a distinction between positional inputs…
Luna Kettlewell, Audrey Sederberg, Gordon B. Smith
Over the course of development, functional sensory representations emerge in the visual cortex. Prior to eye-opening, modular patterns of spontaneous activity form long-range networks that may serve as a precursor for mature network organization. Although the spatial structure of these networks has been well studied…
Tingying He, Jason Dykes, Petra Isenberg, Tobias Isenberg
—We present a new comprehensive theory for explaining, exploring, and using pattern as a visual variable in visualization. Although patterns have long been used for data encoding and continue to be valuable today, their conceptual foundations are precarious: the concepts and terminology used across the research…
Luna Kettlewell, Audrey Sederberg, Gordon B. Smith
Over the course of development, functional sensory representations emerge in the visual cortex. Prior to eye opening, modular patterns of spontaneous activity form long-range networks that may serve as a precursor for mature network organization. Although the spatial structure of these networks has been well studied…
Célia Laurent, David Smith, Francesca Sargolini, Pierre-Yves Jacob
In everyday life, mammals have to find their way between interconnected spaces. How the brain processes spatial information in these complex environments is a crucial question for understanding how we navigate. Theoretical frameworks have proposed that the brain produces simultaneous activities that are either…
Hans A. Trukenbrod, Simon Barthelmé, Felix A. Wichmann, Ralf Engbert
Address correspondence to: Hans Trukenbrod Department of Psychology University of Potsdam Am Neuen Palais 10 D–14469 Potsdam Germany E-mail: Hans.Trukenbrod@uni-potsdam.de Phone: +49 331 9772703, Fax: +49 331 9772794 Scene viewing is used to study attentional selection in complex but still controlled environments. One…
Lei Zheng, Nico Marek, Natalia Melnik, Stefan Pollmann
Contextual cueing leads to improved efficiency in visual search resulting from the extraction of spatial regularities in repeated visual stimuli. Previous research has demonstrated the independent contributions of global configuration and spatial position to contextual cueing. The present study aimed to investigate…
Bo Zhang, Jia Liu
The phenomenon of neuronal replay, the sequential reactivation of hippocampal place cells for past experiences, have been proposed to organize learned knowledges into a cognitive map. Here we used the spin-glass model to simulate the formation of the hexagonal pattern of grid cells, the metric of cognitive map, when…
Giulio Casali, Sarah Shipley, Charlie Dowell, Robin Hayman + 1 more
'Caswell Barry'] The regular firing pattern exhibited by medial entorhinal (mEC) grid cells of locomoting rodents is hypothesized to provide spatial metric information relevant for navigation. The development of virtual reality (VR) for head-fixed mice confers a number of experimental advantages and has become…
Francis Carpenter, Caswell Barry
Grid cells have been proposed to encode both the self-location of an animal and the relative position of locations within an environment. We reassess the validity of these roles in light of recent evidence demonstrating grid patterns to be less temporally and spatially stable than previously thought.
Alireza Chenani, Ghabiba Weston, Alessandro F. Ulivi, Tim P. Castello-Waldow + 2 more
Stress exposure strongly contributes to the pathophysiology of psychiatric diseases such as depression, schizophrenia, anxiety, and post-traumatic stress disorder. It also affects both function and structure of hippocampal CA1, leading to episodic memory impairment. Here, we used deep-brain optical imaging to elucidate…
Andrey Babichev, Dmitriy Morozov, Yuri Dabaghian
The spiking activity of the hippocampal place cells plays a key role in producing and sustaining an internalized representation of the ambient space—a cognitive map. These cells do not only exhibit location-specific spiking during navigation, but also may rapidly replay the navigated routs through endogenous dynamics…
Kate J. Jeffery
Study of the neural code for space in rodents has many insights to offer for how mammals, including humans, construct a mental representation of space. This code is centered on the hippocampal place cells, which are active in particular places in the environment. Place cells are informed by numerous other spatial cell…
Authors not listed
Laser modification of polymer surfaces is critical in many contexts including self-cleaning materials, microelectronics, and biomedical research. Despite their utility, accessing these modified polymers requires expensive or complex materials and multi-step fabrication, masking, and washing processes. Here, we present…
Lionel Zoubritzky, François-Xavier Coudert
We present here an open-source Julia library for the topological identification of crystalline materials, with algorithmic and computational improvements over the previously available software in the field, resulting in a speed increase of one order of magnitude. This new algorithm and implementation can therefore be…
Alexis D. J. Makin, John Tyson-Carr, Yiovanna Derpsch, Giulia Rampone + 2 more
'Giulia Rampone' 'Marco Bertamini' 'Tyler Davis'] An Event Related Potential (ERP) component called the Sustained Posterior Negativity (SPN) is generated by regular visual patterns (e.g. vertical reflectional symmetry, horizontal reflectional symmetry or rotational symmetry). Behavioural studies suggest symmetry…
Neetu ., Aman Saini, Rishi Ram Mahato, Priyanka . + 1 more
The theory behind origin of life to Darwinian evolution considers emergence of dissipative structures driven by the flow of energy across all length scales. To this end, developing and deeper understanding of non-equilibrium self-assembly processes under continuous supply of energy is a demanding matter, both in…
Tibin John, Yajun Zhou, Ayman Aljishi, Bastian Rieck + 2 more
The hippocampus plays a critical role in the formation of memories and in the representation of time, yet the coding principles that connect these functions are poorly understood. We hypothesized that hippocampal neurons selective for specific visual stimuli adjust their tuning to encode sequence structure, smoothly…
Xiaoliang Luo, Robert M. Mok, Bradley C. Love
Discoveries of functional cell types, exemplified by the cataloging of spatial cells in the hippocampal formation, are heralded as scientific breakthroughs. We question whether the identification of cell types based on human intuitions has scientific merit and suggest that “spatial cells” may arise in non-spatial…
J. Gerard Wolff
The SP theory of intelligence aims to simplify and integrate concepts in computing and cognition, with information compression as a unifying theme. This article is about how the SP theory may, with advantage, be applied to the understanding of natural vision and the development of computer vision. Potential benefits…
Authors not listed
The capacity to pattern biomolecules within microfluidic devices expands the scope of microfluidic technologies. In such patterned systems, surface-bound components remained localized, while the microfluidic network supplies reagents and removes waste products. This approach has enabled continuous protein expression…
Andrey Babichev, Vladimir Vashin, Yuri Dabaghian
Topological techniques have become a popular tool for studying information flows in neural networks. In particular, simplicial homology theory is used to analyze how cognitive representations of space emerge from large conglomerates of independent neuronal contributions. Meanwhile, a growing number of studies suggest…
Matthew Bailey, Mark Wilson
One of the critical tools of persistent homology is the persistence diagram. We demonstrate the applicability of a persistence diagram showing the existence of topological features (here rings in a 2D network) generated over time instead of space as a tool to analyse trajectories of biological networks. We show how the…