Results 81 to 90 of about 883,994 (287)

Directed homology and persistence modules

Journal of Applied and Computational Topology
Abstract We give a self-contained account on a construction for a directed homology theory based on modules over algebras, linking it to both persistence homology and natural homology. We study its first properties, among which relative homology and Mayer-Vietoris long exact sequences and a Kunneth formula.
openaire   +4 more sources

Multipath-Enhanced Directional Modulation for Secure mmWave On-Body Communication

IEEE Open Journal of Antennas and Propagation
This paper proposes Directional Modulation (DM) for secure millimeter-wave (mmWave) on-body communication, where security is enhanced by leveraging multipath propagation.
Wasi Ur Rehman Khan, Max. J. Ammann, Hossein Raghib Hokmabadi, William G. Scanlon, Adam Narbudowicz   +4 more
doaj   +1 more source

Impact of Imperfect Angle Estimation on Spatial and Directional Modulation

IEEE Access, 2020
In this paper, we investigate the impact of imperfect angle estimation (IAE) on spatial and directional modulation (SDM) systems, assuming that the signal experiences line of sight (LoS) propagation.
Hongyan Zhang, Yue Xiao, Yanping Xiao, Wei Xiang   +3 more
doaj   +1 more source

Stage‐Dependent β‐Synuclein Links MRI and Cognitive Decline in Alzheimer's Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Synaptic degeneration drives cognitive decline in Alzheimer's disease (AD), but synaptic biomarkers are scarce. Brain‐enriched β‐synuclein emerged as a synaptic damage marker. We investigated its diagnostic, prognostic, and structural correlates across the AD continuum.
Ulaş Ay, Merve Alaylioglu, Erdi Sahin, Sanem Sultan Yoruk Oner, Gulce Iskan, Gulce Cosku Yilmaz Cakan, Gozde Kizilates‐Evin, Emre Hari, Elif Kurt, Erdinc Dursun, Basar Bilgic, Hasmet Hanagasi, Hakan Gurvit, Tamer Demiralp, Duygu Gezen‐Ak, Bedia Samanci   +15 more
wiley   +1 more source

A BER-Driven Approach for Designing Energy-Efficient Directional Modulation Schemes

IEEE Open Journal of the Communications Society
In this paper, we propose a novel, energy-efficient bit error rate (BER)-driven directional modulation (DM) scheme to enhance the physical layer (PHY) security of wireless communication systems.
Mehdi Hosseinali Zadeh, Sajjad Emdadi Mahdimahalleh, Mehdi Maleki, Nghi H. Tran, Hamid Reza Bahrami   +4 more
doaj   +1 more source

Cerebrospinal Fluid Over Plasma Links Analytes to Cognitive Decline in Older Adults at Risk for Alzheimer's Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To identify inflammatory analytes in cerebrospinal fluid (CSF) and plasma associated with cognitive decline in cognitively normal (CN) older adults at risk for Alzheimer's disease (AD). Methods In a longitudinal study of 118 CN older adults (65–80 years, 54% APOE ε4, 26% preclinical AD), 1331 CSF and 1501 plasma analytes were ...
Jagan A. Pillai, Audrey Zhu, Chunxuan Ma, Ming Wang, Yifan Yang, Lynn M. Bekris, Maria Khrestian, Frank P. DiFilippo, Mikhail Nasrallah, Aaron Burberry, James B. Leverenz, Yuan Hou, Feixiong Cheng, Stephen M. Rao   +13 more
wiley   +1 more source

Module with Direct Actuation System

, 2017
In order to cope with the issues arisen by analysing the first version of the system presented in Chap. 5, a new version of the module has been designed and it will be described in this chapter. It will be based on direct actuation of the joints. Furthermore, we will describe the introduction of an important feature as the possibility to regulate in ...
Mansutti, Alessandro, Covarrubias Rodriguez, Mario, Bordegoni, Monica, Cugini, Umberto   +3 more
openaire   +2 more sources

Non-reciprocal elastic wave propagation in spatiotemporal periodic structures

New Journal of Physics, 2016
We study longitudinal and transverse wave propagation in beams with elastic properties that are periodically varying in space and time. Spatiotemporal modulation of the elastic properties breaks mechanical reciprocity and induces one-way propagation.
G Trainiti, M Ruzzene
doaj   +1 more source

Modular Critical Element Recycling Platform Using a Nanoporous Additively Manufactured Gyroid

Advanced Engineering Materials, EarlyView.
A modular recycling platform integrates 3D‐printed nanoporous gyroid structures to enable efficient critical element recovery. This system utilizes a hierarchical architecture, combining macroscopic channels with polymerization‐induced nanoscale porosity. By systematically tuning structural wall thickness and resin formulation, the platform achieves an
Xiangyu Gao, Keldy Mason, Mert Gülçür, Rachel Paddock‐Lamb, Prince Alvin Fofanah, Zachariah A. Page, Michael Cullinan   +6 more
wiley   +1 more source

SECURE M -PSK COMMUNICATION VIA DIRECTIONAL MODULATION

, 2020
In this work, a directional modulation-based technique is devised to enhance the security of a multi-antenna wireless communication system employing M -PSK modulation to convey information. The directional modulation method operates by steering the array
Symeon Chatzinotas, Sina Maleki, Ashkan Kalantari, Mojtaba Soltanalian, Björn Ottersten   +4 more
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