Results 1 to 10 of about 59,238 (279)

Metasurface Based Positional Modulation Design [PDF]

IEEE Access, 2020
Directional modulation (DM) can transmit information to the desired direction or directions with known constellation mappings, but with scrambled ones in other directions.
Bo Zhang, Wei Liu, Qiang Li, Yang Li, Xiaonan Zhao, Cuiping Zhang, Cheng Wang   +6 more
doaj   +4 more sources

Five-Dimensional Positional Modulation with Quench-Trapped Modulation Phase in Solid-state Electrolyte Network Solid [PDF]

Structural Dynamics
Here we report on an interpenetrated network solid:(Adpn)3Zn(BF4)2 which exhibits multiple crystallographically modulated phases; one of which is only accessible by quench-trapping.
M. Brody Mistrot, Michael J. Zdilla
doaj   +2 more sources

Design, Modeling, and Testing—A Compact Variable-Stiffness Actuator for Knee Joint Dimensions [PDF]

Micromachines
Stroke rehabilitation exoskeletons require joint mechanisms capable of replicating physiological stiffness modulation to adapt to varying gait phases. This paper presents a novel compact variable-stiffness mechanism (VSM) for knee exoskeletons, based on ...
Guoning Si, Zilong Guo, Zhuo Zhang
doaj   +2 more sources

Beam Tracking X-Ray Phase-Contrast Imaging Using a Conventional X-Ray Source [PDF]

Sensors
To address the issue of insufficient contrast in conventional X-ray absorption imaging for biological soft tissues and weakly absorbing materials, this paper proposes a beam tracking X-ray phase-contrast imaging system using a conventional X-ray source ...
Jiaqi Li, Jianheng Huang, Xin Liu, Yaohu Lei, Botao Mai, Chenggong Zhang   +5 more
doaj   +2 more sources

Circadian rhythm disruption as a potential contributor to BPPV: Evidence from a young rat model vestibular effects of circadian disruption. [PDF]

PLoS ONE
Circadian rhythm disturbances, increasingly common due to artificial lighting and modern lifestyle factors, may underlie vestibular dysfunction such as benign paroxysmal positional vertigo (BPPV), even in younger populations.
Hüsniye Gül Otlu, Hanifi Korkmaz, Nilüfer Diller Bulut, Nurcan Göktürk   +3 more
doaj   +2 more sources

Sparse Antenna Array Based Positional Modulation Design With a Low-Complexity Metasurface

IEEE Access, 2020
Positional modulation (PM) has been introduced recently where a given modulation pattern can only be received at certain desired positions. To achieve it, the multi-path effect is exploited for positional modulation with the aid of metasurface acting as ...
Bo Zhang, Wei Liu, Jingxiao Ma, Zichen Qi, Junwei Zhang, Liang Han, Yang Li, Xiaonan Zhao, Cuiping Zhang, Cheng Wang   +9 more
doaj   +1 more source

The role of character positional frequency on Chinese word learning during natural reading. [PDF]

PLoS ONE, 2017
Readers' eye movements were recorded to examine the role of character positional frequency on Chinese lexical acquisition during reading and its possible modulation by word spacing.
Feifei Liang, Hazel I Blythe, Xuejun Bai, Guoli Yan, Xin Li, Chuanli Zang, Simon P Liversedge   +6 more
doaj   +1 more source

Assessment of Nocturnal Autonomic Cardiac Imbalance in Positional Obstructive Sleep Apnea. A Multiscale Nonlinear Approach

Entropy, 2020
Positional obstructive sleep apnea (POSA) is a major phenotype of sleep apnea. Supine-predominant positional patients are frequently characterized by milder symptoms and less comorbidity due to a lower age, body mass index, and overall apnea-hypopnea ...
Daniel Álvarez, C. Ainhoa Arroyo, Julio F. de Frutos, Andrea Crespo, Ana Cerezo-Hernández, Gonzalo C. Gutiérrez-Tobal, Fernando Vaquerizo-Villar, Verónica Barroso-García, Fernando Moreno, Tomás Ruiz, Roberto Hornero, Félix del Campo   +11 more
doaj   +1 more source

Constant Reflection Attenuation Constraint for Incoming Signals on Metasurface in Positional Modulation Design

IEEE Access, 2020
Metasurface based positional modulation design has been introduced recently, where a given modulation pattern can only be received at certain desired positions by the proposed method.
Bin Liang, Jun Shi, Bo Zhang
doaj   +1 more source

Incommensurate antiferromagnetic order in CePtAl_{3}

Physical Review Research, 2023
We report on a neutron diffraction study of single-crystal CePtAl_{3} complemented by measurements of the specific heat under applied magnetic field. Below T_{N}≈3 K, CePtAl_{3} develops incommensurate antiferromagnetic order with a single modulation ...
M. Stekiel, P. Čermák, C. Franz, W. Simeth, S. Weber, E. Ressouche, W. Schmidt, K. Nemkovski, H. Deng, A. Bauer, C. Pfleiderer, A. Schneidewind   +11 more
doaj   +1 more source