Results 81 to 90 of about 3,406,012 (295)

Propagation Modelling of Path Loss Models for Wireless Communication in Urban and Rural Environments at 1800 GSM Frequency Band

open access: yesAdvances in Electrical and Electronic Engineering, 2016
In this research various channel propagation models of wireless communication systems were analysed. There are many types of propagation models that can minutely calculate the path loss in all types of terrain.
Yahia Salem, Lubomir Ivanek
doaj   +1 more source

Chronobiology of Cancer: How Aging Fuels Oncogenesis at the Molecular Level

open access: yesAging and Cancer, EarlyView.
This graphical abstract illustrates the key biological pathways linking aging with cancer development and progression. In the upper left, cumulative exposure to ultraviolet radiation, toxins, and reactive oxygen species (ROS) causes DNA damage and genomic instability, whereas age‐related decline in repair mechanisms, such as ATM/ATR, BER, and NER ...
Anu Singh, Aroonima Misra, Sufian Zaheer
wiley   +1 more source

Thalamo‐Lesional Connectivity Signatures of Bilateral Tonic–Clonic Seizures in Focal Cortical Dysplasia‐Related Epilepsy

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objectives Focal cortical dysplasia (FCD) is the most common etiology of drug‐resistant epilepsy in children. Focal to bilateral tonic–clonic seizures (FBTCS) mark a high risk of drug‐resistant epilepsy and involve thalamocortical circuitry in their generation and propagation.
Hua Xie   +8 more
wiley   +1 more source

Empirical Study of Near Ground Propagation in Forest Terrain for Internet-of-Things Type Device-to-Device Communication

open access: yesIEEE Access, 2018
This paper presents continuous-wave power measurements conducted in forest terrain with a focus on path-loss in a device-to-device (D2D) communication scenario.
Johannes Hejselbaek   +3 more
doaj   +1 more source

Propagation-loss Characterization for Livestock Implantables at 433, 868, and 1400 MHz

open access: yes, 2021
International audienceAutomated systems based on wearable sensors for livestock monitoring are becoming increasingly popular. Specifically, wireless in-body sensors could yield relevant data such as ruminal temperature.
Tuyttens, Frank   +10 more
core   +1 more source

Characterizing Cutaneous α‐Synuclein Deposition and Seeding Activity in Parkinson's Disease Subtypes

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Cutaneous phosphorylated α‐synuclein (p‐syn) and α‐synuclein seeding activity are promising biomarkers for Parkinson's disease (PD), but their clinical value remains uncertain due to disease heterogeneity. This study evaluates these two biomarkers in PD patients to inform phenotype‐specific diagnosis and disease severity assessment ...
Yuting Jin   +8 more
wiley   +1 more source

Investigation of near field distributions of meander line antenna in human body conditions

open access: yesAl-Qadisiyah Journal for Engineering Science
Understanding the near-field distribution of antennas has become more significant since it directly effects radiation performance, energy absorption, and safety in current wireless applications, especially when antennas operate close to the human body ...
Ngu War Hlaing   +3 more
doaj   +1 more source

Optical waveguide propagation loss measurement using multiple reflections method

open access: yes, 2005
Optical waveguide propagation loss measurement method based on optical multiple reflections detection is presented in this paper. By using a precision reflectometer, uncertain influence on waveguide propagation loss measurement caused by fiber-waveguide ...
Xu QY   +5 more
core  

Study of UAV line-of-sight communication probability and propagation loss for mountain in 110 GHz band

open access: yesDianzi Jishu Yingyong
This paper establishes a millimeter-wave channel model for unmanned aerial vehicles based on line-of-sight probability using the ray tracing method, and a double-slope model analysis is carried out for path loss. This paper describes the modeling process
Ding Penghui   +6 more
doaj   +1 more source

Insertion loss and misalignment tolerance in multimode tapered waveguide bends [PDF]

open access: yes, 2008
Experimental measurements of laterally tapered multimode waveguide bends fabricated photolithographically on FR4 printed circuit board establish that the product of the mean insertion loss (in linear units) and the mean source misalignment tolerance is a
Papakonstantinou, I   +2 more
core  

Home - About - Disclaimer - Privacy