24 papers · ranked by Valyu relevance
E. Mika Diamanti, Charu Bai Reddy, Sylvia Schröder, Tomaso Muzzu + 3 more
During navigation, the visual responses of neurons in primary visual cortex (V1) are modulated by the animal’s spatial position. Here we show that this spatial modulation is similarly present across multiple higher visual areas but largely absent in the main thalamic pathway into V1. Similar to hippocampus, spatial…
Garimella Rama Murthy, Kunal Sankhe
Massive MIMO, a candidate for 5G technology, promises significant gains in wireless data rates and link reliability by using large numbers of antennas (more than 64) at the base transceiver station (BTS). Extra antennas help by focusing the transmission and reception of signal energy into eversmaller regions of space.…
Manar Mohaisen, Saetbyeol Lee
In this paper, we propose a spatial modulation (SM) scheme referred to as complex quadrature spatial modulation (CQSM). In contrast to quadrature spatial modulation (QSM), CQSM transmits two complex signal constellation symbols on the real and quadrature spatial dimensions at each channel use, increasing the spectral…
Dinh-Thuy Phan-Huy, Yvan Kokar, Kammel Rachedi, Patrice Pajusco + 15 more
'Ali Mokh' 'Theoni Magounaki' 'Rizwan Masood' 'Cyril Buey' 'Philippe Ratajczak' 'Nadine Malhouroux‐Gaffet' 'Jean-Marc Conrat' 'Jean-Christophe Prévotet' 'Abdelwaheb Ourir' 'Julien de Rosny' 'Matthieu Crussière' 'Maryline Hélard' 'Azeddine Gati' 'T. Sarrebourse' 'Marco Di Renzo'] ABSTRACT In this paper, for the first…
Wai-Yiu Keung, Wing‐Kin Ma
This paper considers the context of multiuser massive MIMO downlink precoding with lowresolution digital-to-analog converters (DACs) at the transmitter. This subject is motivated by the consideration that it is expensive to employ high-resolution DACs for practical massive MIMO implementations. The challenge with using…
Jian Wang, Jun Liu, Shuhui Li, Yifan Zhao + 2 more
Orbital angular momentum (OAM), which describes tailoring the spatial physical dimension of light waves into a helical phase structure, has given rise to many applications in optical manipulation, microscopy, imaging, metrology, sensing, quantum science, and optical communications. Light beams carrying OAM feature two…
Jifa Zhang
—Joint radar and communication (RadCom) systems have been proposed to integrate radar and communication into one platform and achieve spectrum sharing in recent years. However, the joint RadCom systems cause the clutter modulation and the performance degradation of radar. Therefore, it's very essential to improve the…
Yong Liang, Gang Wen, Jie Zhang, Simin Li + 6 more
Super-resolution structured illumination microscope (SR-SIM) has been established as a powerful tool for visualizing subcellular dynamics and studying organelle interactions in live cells. However, the interfering Gaussian beams result in a limited and nonuniform field of view (FOV) which hinders its application for…
Baiwei Liu, Anna C. Nobre, Freek van Ede
Covert spatial attention is associated with spatially specific modulation of neural activity as well as with directional biases in fixational eye-movements known as microsaccades. Recently, this link has been suggested to be obligatory, such that modulation of neural activity by covert spatial attention occurs only…
Zahra M. Aghajan, Diane Villaroman, Sonja Hiller, Tyler J. Wishard + 9 more
How the human brain supports accurate navigation of a learned environment has been an active topic of research for nearly a century^1–5^. In rodents, the theta rhythm within the medial temporal lobe (MTL) has been proposed as a neural basis for fragmenting incoming information and temporally organizing experiences and…
Wenjiao Chen, Chunsheng Li, Ze Yu, Peng Xiao
Sub-Nyquist sampling technology can ease the conflict between high resolution and wide swath in a synthetic aperture radar (SAR) system. However, the existing sub-Nyquist SAR imposes a constraint on the type of the observed scene and can only reconstruct the scene with small sparsity (i.e., number of significant…
Amrollah Amini, Homayoon Oraizi
Spatio-temporally modulated impedance surfaces can be good candidates for generation of radiating waves with arbitrary eigenstates by breaking momentum and energy conservations. Here, we present a theoretical framework based on the holographic technique and generalized Floquet-wave expansion to analyze…
Abderrahmen Trichili, Carmelo Rosales-Guzmán, Angela Dudley, Bienvenu Ndagano + 3 more
'Bienvenu Ndagano' 'Amine Ben Salem' 'Mourad Zghal' 'Andrew Forbes'] Mode division multiplexing (MDM) is mooted as a technology to address future bandwidth issues, and has been successfully demonstrated in free space using spatial modes with orbital angular momentum (OAM). To further increase the data transmission…
Mickael Mounaix, Nicolas K. Fontaine, David T. Neilson, Roland Ryf + 3 more
'Haoshuo Chen' 'Juan Carlos Alvarado-Zacarias' 'Joel Carpenter'] Lossless linear wave propagation is symmetric in time, a principle which can be used to create time reversed waves. Such waves are special “pre-scattered” spatiotemporal fields, which propagate through a complex medium as if observing a scattering process…
Oscar Woolnough, Kiefer J. Forseth, Patrick S. Rollo, Zachary J. Roccaforte + 1 more
Visual inputs to early visual cortex integrate with semantic, linguistic and memory inputs in higher visual cortex, in a manner that is rapid and accurate, and enables complex computations such as face recognition and word reading. This implies the existence of fundamental organizational principles that enable such…
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…
Alan E Willner
The paper ‘Direct fiber vector eigenmode multiplexing transmission seeded by integrated optical vortex emitters’ by J Liu1 has successfully demonstrated that different data-carrying vector modes can be used to increase capacity through data-carrying, full-vectorial fiber eigenmode multiplexing communications in…
Authors not listed
This paper formally defines an operational isomorphism between spectral damping in molecular vibronic systems and neuromodulatory control in biological sensory systems. Without asserting causal continuity or physical identity across scales, we show that both domains instantiate the same class of output-selective…
Aimee Sheehan, Tatsiana Mikulchyk, Catherine De Castro, Safakath Karuthedath + 7 more
A series of new heavy-atom-free photosensitizers using 2,6-diethoxycarbonyl-BODIPY was designed and synthesized. Photoinduced electron transfer between the BODIPY and meso-aryl subunits followed by the formation of BODIPY triplet excited states via spin-orbit charge transfer intersystem crossing (SOCT-ISC) was studied…
Michael Dumelle, Matt Higham, Jay M. Ver Hoef, A. K. M. Anisur Rahman
'A. K. M. Anisur Rahman'] spmodel is an R package used to fit, summarize, and predict for a variety spatial statistical models applied to point-referenced or areal (lattice) data. Parameters are estimated using various methods, including likelihood-based optimization and weighted least squares based on variograms.…
A. Llera, R. Chauvin, P. Mulders, J. Naaijen + 2 more
Functional connectivity between brain regions is modulated by cognitive states or experimental conditions. Such connectivity variations can be appreciated in covariance or correlation matrices obtained from fMRI data. A multivariate methodology that can capture fMRI connectivity maps in light of different experimental…
Davide Spalla, Alexis Dubreuil, Sophie Rosay, Remi Monasson + 1 more
The way grid cells represent space in the rodent brain has been a striking discovery, with theoret-ical implications still unclear. Differently from hippocampal place cells, which are known to encode multiple, environment-dependent spatial maps, grid cells have been widely believed to encode space through a single low…
Authors not listed
Defect engineering offers a powerful strategy to modulate polaron delocalization in π-conjugated materials; however, the complex interplay between different types of defects and dopant-induced Coulomb binding remains insufficiently understood. Here, we present a comprehensive theoretical investigation of hole-polaron…
Authors not listed
When producing plant-protein-based meat analogues via high moisture extrusion (HME), the structure of extrudates is determined by complex interactions between ingredient composition and processing conditions. To facilitate consumers in their transition towards a diet higher in plant-based proteins, the food industry…