Article
Multidisciplinary Sciences
Benjamin Pitt, Alexandra Carstensen, Isabelle Boni, Steven T. Piantadosi, Edward Gibson
Summary: This study found that adults from an indigenous Bolivian group use different spatial reference frames on different axes. They prefer allocentric space on the left-right axis, where spatial discriminations are difficult, but they prefer egocentric space on the front-back axis, where spatial discrimination is relatively easy. This suggests a relationship between spatial cognition, language, and memory, which may be influenced by cultural and contextual factors.
Article
Biochemistry & Molecular Biology
William de Cothi, Nils Nyberg, Eva-Maria Griesbauer, Carole Ghaname, Fiona Zisch, Julie M. Lefort, Lydia Fletcher, Coco Newton, Sophie Renaudineau, Daniel Bendor, Roddy Grieves, Eleonore Duvelle, Caswell Barry, Hugo J. Spiers
Summary: By studying the behavior of humans, rats, and simulated reinforcement learning agents, we found that they exhibit similar dynamics in spatial navigation. These findings contribute to refining navigation models and uncovering shared mechanisms underlying behavior.
Article
Mathematics
Osmin Ferrer, Arley Sierra, Osvaldo Polo
Summary: This paper introduces the concept and properties of orthogonal frames in Krein spaces. It proves the independence of the choice of the fundamental symmetry and derives interesting properties from it. Additionally, it demonstrates the equivalence between orthogonal frames in a Krein space and orthogonal frames in its associated Hilbert space. The paper also characterizes dual frames to a given frame, which is a useful tool for constructing examples.
Article
Neurosciences
Georgette Argiris, Yaakov Stern, Christian Habeck
Summary: This study found that four reference abilities play a significant role in age-related changes in cognition, with different functional connectivity patterns varying with age and behavior. Fluid reasoning showed the most extensive connectivity and selectivity footprint among the reference abilities, indicating a special status in functional networks.
HUMAN BRAIN MAPPING
(2021)
Article
Astronomy & Astrophysics
Leonardo Chataignier
Summary: The paper discusses the construction of relational observables in time-reparametrization invariant quantum mechanics and argues that their physical interpretation can be understood in terms of conditional probabilities, defined from solutions of the quantum constraint equation. It shows how conditional expectation values of worldline tensor fields are related to quantum averages of relational observables. The dynamics of these observables is related to a notion of quantum reference frames.
Article
Psychiatry
Peter C. R. Mulders, Philip F. P. van Eijndhoven, Jasper van Oort, Marianne Oldehinkel, Fleur A. Duyser, Josina D. Kist, Rose M. Collard, Janna N. Vrijsen, Koen V. Haak, Christian F. Beckmann, Indira Tendolkar, Andre F. Marquand
Summary: Transdiagnostic approaches in psychiatry have the potential to overcome the limitations of traditional diagnostic paradigms. This study identified four stable functional domains that transcend diagnosis, related to negative valence, cognition, social functioning, and inhibition/arousal. The use of connectopic mapping and machine learning also showed promise in predicting transdiagnostic functional domains based on individualized topographic representations.
TRANSLATIONAL PSYCHIATRY
(2022)
Article
Mathematics, Applied
K. Mahesh Krishna, P. Sam Johnson
Summary: We conducted a systematic study on frames for metric spaces, proving that every separable metric space can be measured by a metric M-d-frame. Through Lipschitz-free Banach spaces, we established a correspondence between frames for metric spaces and frames for subsets of Banach spaces. We derived characterizations and stability results for metric frames.
RESULTS IN MATHEMATICS
(2022)
Editorial Material
Multidisciplinary Sciences
Roser Vento-Tormo, Roser Vilarrasa-Blasi
Summary: The HuBMAP consortium has created spatially resolved cell atlases for the human intestine, kidney, and placenta, providing unprecedented detail for analyzing tissue organization.
Article
Physics, Multidisciplinary
Lucas F. Streiter, Flaminia Giacomini, Caslav Brukner
Summary: This study in the field of relativistic quantum information demonstrates that Bell's inequalities can be maximally violated in a special relativistic regime, and the degree of violation is independent of the choice of quantum reference frame. This opens up the possibility of extending entanglement-based quantum communication protocols to relativistic regimes.
PHYSICAL REVIEW LETTERS
(2021)
Article
Mathematics
Osmin Ferrer, Arley Sierra, Jose Sanabria
Summary: This paper introduces the concept of discrete frames on soft Hilbert spaces using soft linear operators, extending the classical notion of frames on Hilbert spaces to algebraic structures on soft sets. The results demonstrate properties of frame operators and prove the frame decomposition theorem for every element in a soft Hilbert space. This theoretical framework has potential applications in signal processing, specifically in modeling data packets for communication networks.
Article
Engineering, Electrical & Electronic
Tin Vlasic, Damir Sersic
Summary: This paper introduces a novel framework for single-pixel imaging via compressive sensing in shift-invariant spaces by exploiting the sparsity property of a wavelet representation. It proposes the use of separable B-spline generators and sparsity-inducing spline wavelets to discretize the continuous-domain inverse problem. Experimental results show a significant improvement in the reconstruction quality compared to the conventional discretization in compressive sensing setups.
SIGNAL PROCESSING-IMAGE COMMUNICATION
(2022)
Article
Astronomy & Astrophysics
H. Krasna, L. Baldreich, J. Bohm, S. Boehm, J. Gruber, A. Hellerschmied, F. Jaron, L. Kern, D. Mayer, A. Nothnagel, O. Panzenbock, H. Wolf
Summary: This article introduces the computation of global reference frames from VLBI observations at the Vienna International VLBI Service for Geodesy and Astrometry (IVS) Analysis Center. The results include high-quality celestial and terrestrial reference frames, with improved positions of radio sources and the inclusion of new sources and newly established VLBI telescopes.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Computer Science, Artificial Intelligence
Mahinda Mailagaha Kumbure, Anssi Tarkiainen, Jan Stoklasa, Pasi Luukka, Ari Jantunen
Summary: This study proposes an application of cognitive maps in representing and assessing the cognitive structures of experts. It aims to identify the information needed for expert knowledge management and uses formal modeling tools. The study introduces a novel approach to assessing learning outcomes by analyzing changes in cognitive maps and quantifying their impact. The empirical analysis confirms the viability of the proposed methodology and shows that the course learning significantly improves students' perception and knowledge.
EXPERT SYSTEMS WITH APPLICATIONS
(2024)
Article
Physics, Multidisciplinary
Anne-Catherine de la Hamette, Viktoria Kabel, Esteban Castro-Ruiz, Caslav Brukner
Summary: This article proposes a strategy using quantum reference frame transformations to study the dynamics of objects in the presence of quantum gravitational source. By applying relative-distance-preserving transformations, the mass configuration can be changed to a definite reference frame within the extended framework of quantum reference frames. The dynamics can then be determined using known physics. The time dilation caused by a gravitating object in superposition is examined using this strategy.
COMMUNICATIONS PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Mohammad Jubran, Alhabib Abbas, Yiannis Andreopoulos
Summary: This study proposes a stitching method that extends the frame referencing interval of inter-frame video coding to the entire length of video sequences. The method selects reference frames using compact feature descriptors and a similarity scoring mechanism, achieving significant rate gains with manageable complexity and memory requirements.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY
(2022)