Results 31 to 40 of about 227,474 (293)

Development of Flat Panel Active Phased Array Antennas Using 5G Silicon RFICs at Ku- and Ka-Bands

open access: yesIEEE Access, 2020
This article presents the design and development of two all flat panel phased array antennas (PAA) by using emerging 5G Silicon radio frequency integrated circuits (RFICs) at Ku- and Ka-bands.
Jia-Chi Samuel Chieh   +7 more
doaj   +1 more source

High On-Off Ratio Graphene Switch via Electrical Double Layer Gating

open access: yesIEEE Access, 2020
This paper discusses the production and investigation of novel graphene switches by gating through an electrical double layer (EDL). Controlled voltage biases across a liquid dielectric and graphene induce electrochemical reactions within the dielectric ...
Cody K. Hayashi   +4 more
doaj   +1 more source

Ultraviolet dosage and decontamination efficacy were widely variable across 14 UV devices after testing a dried enveloped ribonucleic acid virus surrogate for SARS-CoV-2

open access: yesFrontiers in Bioengineering and Biotechnology, 2022
Aims: The dosages and efficacy of 14 ultraviolet (UV) decontamination technologies were measured against a SARS-CoV-2 surrogate virus that was dried onto different materials for laboratory and field testing.Methods and results: A live enveloped ...
Tony L. Buhr   +15 more
doaj   +1 more source

UNDERSTANDING GRAY ZONE WARFARE FROM MULTIPLE PERSPECTIVES

open access: yesWorld Affairs, 2022
This study examines the dynamics of gray zone warfare by analyzing its conceptualization in the literature and through its practice in several recent examples.
T. Azad, M. W. Haider, Muhammad Sadiq
semanticscholar   +1 more source

Review of Military Casualties in Modern Conflicts—The Re-emergence of Casualties From Armored Warfare

open access: yesMilitary Medicine, 2021
Introduction The re-emergence of armored warfare in modern conflicts has resulted in a higher number of extremity injuries, burns, and brain injuries. Despite this dramatic increase, little is reported on the type of injuries caused and their management.
A. Khorram-Manesh   +3 more
semanticscholar   +1 more source

Inhalational anthrax (Ames aerosol) in naive and vaccinated New Zealand rabbits: characterizing the spread of bacteria from lung deposition to bacteremia.

open access: yesFrontiers in Cellular and Infection Microbiology, 2012
There is a need to better understand inhalational anthrax in relevant animal models. This understanding could aid risk assessment, help define therapeutic windows, and provide a better understanding of disease.
Bradford eGutting   +10 more
doaj   +1 more source

The Evolution and Ecology of Bacterial Warfare.

open access: yesCurrent Biology, 2019
Bacteria have evolved a wide range of mechanisms to harm and kill their competitors, including chemical, mechanical and biological weapons. Here we review the incredible diversity of bacterial weapon systems, which comprise antibiotics, toxic proteins ...
E. Granato   +2 more
semanticscholar   +1 more source

Narrow band space scanning two-dimensional linear frequency diverse array radar

open access: yesThe Journal of Engineering, 2019
Two–dimensional (2D) linear frequency diverse array (FDA) concept is extended to scan a 2D wide angular sector. This is achieved by highly unequal frequency increments in orthogonal 2D directions of the array.
Ramazan Çetiner, Altunkan Hizal
doaj   +1 more source

A Sampling-Based Approach for Achieving Desired Patterns of Probabilistic Coverage with Distributed Sensor Networks

open access: yesSensors, 2023
A new method is derived for finding the best positions in which to locate the sensors in a distributed sensor network in order to achieve a desired variation, or pattern, in spatial coverage over a specified domain.
Russell Costa, Thomas A. Wettergren
doaj   +1 more source

Finite Element Modeling of K-Monel Bolts under Static Loading and Dynamic Shock Loading

open access: yesShock and Vibration, 2013
The Naval Undersea Warfare Center has funded a project to investigate the accuracy of various bolt models used to represent actual shipboard bolted connections within an analytical shock survivability assessment.
Kevin Behan   +3 more
doaj   +1 more source

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