Results 131 to 140 of about 1,015,748 (173)

A Mechanism for Analyzing the Energy Consumption and Environmental Impact of LoRa Sensors Over Time

open access: yesInternational Journal of Communication Systems, Volume 39, Issue 15, October 2026.
An SPN‐based mechanism, validated against NS‐3 with MAPE below 0.3%, reveals how packet generation rate and spreading factor shape LoRa sensor lifetime, energy consumption, and operational CO2$$ {}_2 $$ emissions, supporting sustainable planning of large‐scale IoT deployments. ABSTRACT Long Range (LoRa) sensors are widely adopted in Internet of Things (
Vandirleya Barbosa   +5 more
wiley   +1 more source

Study of a Frugal Design Picosecond Laser System for Laser‐Assisted Corneal Surgery

open access: yesJournal of Biophotonics, Volume 19, Issue 10, October 2026.
Stromal surface after extraction of the lamella cut with the studied frugal picosecond laser source. ABSTRACT Femtosecond lasers have long been the gold standard for corneal laser‐assisted surgery, but their high cost limits widespread use. This study challenges their supremacy by investigating a cost‐effective alternative: a frugal all‐fiber ...
Maxime Quirke   +9 more
wiley   +1 more source

Coherent Stokes Raman Scattering for Simultaneous Measurement of CO2 and CH4 Temperatures

open access: yesJournal of Raman Spectroscopy, Volume 57, Issue 10, Page 1644-1653, October 2026.
A three‐beam hybrid fs/ps CSRS method is employed to excite the rovibrational transitions in the Fermi‐dyad of CO 2 and the v2 mode of CH 4. Time‐domain spectroscopic models are developed to extract the fuel and flame temperature profiles from experimental CH 4 and CO 2 spectra in a diffusion flame.
Alexander M. Warner   +3 more
wiley   +1 more source

Ultra‐High Isolation Decoupling and Matching Network for mmWave Antennas in Near‐Range FMCW Radars

open access: yesMicrowave and Optical Technology Letters, Volume 68, Issue 10, October 2026.
ABSTRACT A decoupling and matching network (DMN) based on substrate integrated coaxial line technique is proposed to suppress the mutual coupling between a pair of transmitting and receiving antennas operating at 35 GHz. The distorted radiation patterns, typically observed in closely spaced antennas, were improved by introducing carefully designed ...
Zhi Yue Xu, Xinyi Tang, Zhi Ning Chen
wiley   +1 more source

ROBUST CHIRP PARAMETER ESTIMATION FOR HANN WINDOWED SIGNALS

open access: yes, 2008
The sinusoidal model has been a fundamentally important signal representation for coding and analysis of audio. We present an enhancement to sinusoidal modeling in the form of a linear frequency chirp parameter estimator applicable to Hann-windowed quasi-
Yi-wen Liu, Aaron S. Master
core  

Modification of the Madeira River morphology following large hydropower projects detected by satellite data

open access: yesRiver, Volume 5, Issue 3, Page 369-387, August 2026.
Abstract Estimating suspended sediment concentration (SSC) in river channels is essential for understanding hydro‐sedimentological processes, managing water quality, and conserving aquatic ecosystems. This study evaluated different empirical equations to estimate SSC in the lower Madeira River and analyzed its hydro‐sedimentary dynamics based on MODIS ...
Matheus Silveira de Queiroz   +5 more
wiley   +1 more source

Photofluidization of Azobenzene‐Based Smart Materials: Fundamental Mechanisms, Structural Classifications, and Surface Patterning Applications

open access: yesSmartMat, Volume 7, Issue 5, October 2026.
Azobenzene materials possess reversible photofluidization, promising for surface patterning. This review summarizes state‐of‐the‐art advances in azo‐material photofluidization, including photoisomerization mechanisms, molecular/polymer structural categories, emerging patterning applications, remaining challenges and future outlooks.
Jian Chen   +4 more
wiley   +1 more source

A Novel Distributed Sensor Network to Assess Wind Turbine Blade Acoustics for Structural Health Monitoring

open access: yesWind Energy, Volume 29, Issue 10, October 2026.
ABSTRACT To reduce the need for scheduled wind turbine blade inspections and large‐scale repairs, a novel distributed acoustic sensing system for monitoring the structural health of wind turbine blades is proposed. This integral passive monitoring system utilizes a sparse array of in‐blade multimodal sensors and a single blade‐external downtower sensor,
Connor Pozzi   +5 more
wiley   +1 more source

Optimization of Short Probe Linear Frequency Modulated Signal Parameters

open access: yesArchives of Acoustics, 2013
In many physical experiments, linear frequency modulated (LFM) signals are widely used to probe objects in different environments, from outer-space to underwater.
Włodzimierz POGRIBNY   +1 more
doaj  

Effects of Reduced Precipitation and Water Level Variability on Phytoplankton Dynamics and Thermal Structure in a Large Tropical Reservoir

open access: yesWater Resources Research, Volume 62, Issue 10, October 2026.
Abstract Drought is one of the most severe and complex natural hazards causing changes in water balance and impeding crucial water‐dependent ecosystem services. Over the last 25 years, multiple severe droughts linked to El Niño events have affected the Zambian and Zimbabwean regions.
Anna Joelle Greife   +11 more
wiley   +1 more source

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