Results 21 to 30 of about 43,612 (267)

Broadband Signalling Explained [PDF]

open access: yes, 2001
From the Publisher: Broadband Signalling Explained is a comprehensive handbook. It introduces the basics and evolution of ATM (Asynchronous Transfer Mode) and provides an overview of the concepts of protocols and signalling. It identifies the standards and describes the international bodies responsible for producing them, including the ITU ...
openaire   +1 more source

The Design of a Multifunctional Coding Transmitarray with Independent Manipulation of the Polarization States

open access: yesMicromachines
Manipulating orthogonally polarized waves independently in a single metasurface is pivotal. However, independently controlling the phase shifts of orthogonally polarized waves is difficult, especially in the same frequency bands.
Shunlan Zhang   +4 more
doaj   +1 more source

Design of a Digital Array Signal Processing System with Full Array Element

open access: yesRemote Sensing, 2023
For the application of a digital array signal processing system with a high sampling rate and large bandwidth, and considering the constraints of limited resources (performance, volume, power consumption, weight, etc.), this paper proposes a design and ...
Guoyao Xiao   +4 more
doaj   +1 more source

Angle of Arrival Estimation for Broadband Signals: A Comparison [PDF]

open access: yesIET Intelligent Signal Processing Conference 2013 (ISP 2013), 2013
This paper reviews and compares three different linear algebraic signal subspace techniques for angle of arrival estimation. These include a polynomial matrix approach to multiple signal classification (MUSIC), a parameterised spatial covariance matrix approach, and an auto-focussing based version of coherent signal subspace estimation applied to MUSIC.
Alrmah, Mohamed Abubaker   +4 more
openaire   +2 more sources

The Role of Calcitonin Gene‐Related Peptide in High‐Altitude Headache: A Prospective Field Study

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective High‐altitude headache (HAH) is a common neurological condition associated with rapid ascent to high altitude. The pathophysiological mechanisms underlying HAH remain incompletely understood. Calcitonin gene‐related peptide (CGRP), a neuropeptide implicated in migraine pathophysiology, may play a key role in the pathophysiology of ...
Roman Schniepp   +4 more
wiley   +1 more source

Classification and Identification Method of Communication Radiation Source Feature Based on Softmax Regression [PDF]

open access: yesJisuanji gongcheng, 2018
According to the characteristics of the current communication source identification method needs not only the higher number of samples,and identification efficiency is low,recognition rate drop,this paper proposes a Softmax regression was applied to ...
LIU Yachong,TANG Zhiling
doaj  

Cumulative Social Disadvantage and Disease Activity in Juvenile Idiopathic Arthritis: A Childhood Arthritis and Rheumatology Research Alliance Registry Study

open access: yesArthritis Care &Research, EarlyView.
Objective Social determinants of health (SDOH) contribute to juvenile idiopathic arthritis (JIA) disparities, but most studies have assessed SDOH independently rather than cumulatively across individual, family, and neighborhood levels. Using a socioecological framework, we investigated the relationship among cumulative social disadvantage ...
William Daniel Soulsby   +448 more
wiley   +1 more source

ORTHOGONAL NOISE-LIKE SIGNAL SYMBOLS FOR BROADBAND CHANNEL PROTECTION [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2019
The paper deals with development and analysis of particular case in a complex protection for a channel where radio messages are exchanged on the basis of mutually orthogonal signal broadband characters and alphabets based on them.
A. Y. Grishentsev   +3 more
doaj   +1 more source

A Compact Spin‐Coated Graphene UWB Antenna for Breast Tumor Detection

open access: yesAdvanced Engineering Materials, EarlyView.
A compact, spin‐coated graphene ultra‐wideband patch antenna designed for breast tumor detection, capable of distinguishing between malignant and benign tumors. This innovative antenna can serve as an effective initial screening tool, particularly in resource‐limited settings such as rural areas, where access to advanced medical equipment like MRI and ...
Raja Rashidul Hasan   +9 more
wiley   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal   +2 more
wiley   +1 more source

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