Results 41 to 50 of about 167,468,979 (158)

Photonic Frequency Down Conversion Approach to Measure Microwave Signal Angle of Arrival

IEEE Photonics Journal, 2022
This paper presents an angle-of-arrival (AOA) measurement system based on microwave photonic frequency down conversion. It has the novelty of no LO is needed for the frequency conversion process. Instead, a ramp waveform is used to shift the frequency of
Chongjia Huang, Erwin Hoi Wing Chan
doaj   +1 more source

Methodology to identify ecologically matching areas and its applications in conservation planning

Conservation Biology, EarlyView.
Abstract Identifying ecologically matching areas is both challenging and critical for understanding spatial patterns of biodiversity and advancing conservation planning. However, existing approaches often lack spatial flexibility, overlook shape and size constraints, or rely on limited environmental parameters, reducing their effectiveness in real ...
Pietro Milanesi, Alessandro Chiarucci, Alessandra Maria Bissattini, Vincenzo Buono, Gianluca Piovesan, Carlo Rondinini, Umberto Valdrè, Marco Musiani   +7 more
wiley   +1 more source

Impact of Two Radio Occultation Constellations on Numerical Weather Prediction: Polar‐Orbits Only and Mixed Polar‐Equatorial Orbits

Earth and Space Science, Volume 13, Issue 10, October 2026.
Abstract This study explores the relative impact of two orbital configurations for Global Navigation Satellite System radio occultation (RO) observations in numerical weather prediction using observing system simulation experiments (OSSE). Three experiments are carried out: a Control experiment with no RO observations and two experiments with 14,000 RO
Nikki C. Privé, Christopher Barsoum, Douglas Hunt, Michael J. Murphy, Richard Anthes, William Gullotta, Natalie Laudier   +6 more
wiley   +1 more source

2-D angle of arrival estimation using a one-dimensional antenna array [PDF]

, 2014
In this paper, a two-dimensional (2-D) angle of arrival (AOA) estimator is presented for vertically polarised waves in which a one-dimensional (1-D) antenna array is used.
McLernon, DC, Al-Jazzar, SO, Strangeways, HJ   +2 more
core   +6 more sources

Optical Basicity of Glasses: Review and Application in Nuclear Glass Formulation

International Journal of Applied Glass Science, Volume 17, Issue 4, October 2026.
A self‐consistent set of optical basicity (OB) values was compiled and evaluated for 95 binary oxides using electronegativity, ionic–covalent, and optical‐property approaches, providing a robust basis for estimating the basicity of complex compounds and glasses.
John McCloy, John Bussey, Wyatt Kiff
wiley   +1 more source

Ultrasonication as a Green Processing Technology for Modulating the Physico‐Chemical, Rheological and Proximate Properties of Pearl Millet and Bambara Groundnut Flours

Legume Science, Volume 8, Issue 3, September 2026.
ABSTRACT Ultrasonication has emerged as an environmentally friendly processing technology for modifying the functional characteristics of food materials; however, its effects on underutilized cereal–legume systems remain insufficiently understood. This study investigated the influence of ultrasonication amplitude (25%–75%) and treatment duration (30–60 
Adeyemi Ayotunde Adeyanju, Temaswati Nkosi, Oluwafemi Ayodeji Adebo   +2 more
wiley   +1 more source

Hardware Design for an Angle of Arrival Positioning System [PDF]

, 2019
Nowadays, there are a variety of different indoor positioning systems employing diverse techniques. Besides inertial navigation, most systems are based on ranging.
Zinke, Adrian, Ellinger, Frank, Gunia, Marco, Joram, Niko   +3 more
core   +1 more source

Waste Adsorbent Valorization of Biopolymer‐Modified Zn–Fe Layered Double Hydroxides for Crystal Violet Removal and Enhanced Nonenzymatic Urea Detection

ChemElectroChem, Volume 13, Issue 16, 18 August 2026.
This graphical abstract illustrates the synthesis of Zn–Fe LDH composites with biopolymers (chitosan, cellulose, and carrageenan) for the efficient removal of crystal violet dye. The resulting spent adsorbents are subsequently repurposed for electrocatalytic urea detection, demonstrating a sustainable, circular approach to wastewater treatment and ...
Abdalla Abdelwahab, Khalaf M. Alenezi, Odeh A. O. Alshammari, Jamal R. Humaidi, Ashanul Haque, Hala Mohamed, Fatma Mohamed, Rehab Mahmoud, Hani El Moll   +8 more
wiley   +1 more source

A Simple Angle of Arrival Estimation System [PDF]

, 2017
We propose a practical, simple and hardware friendly, yet novel and very efficient, angle of arrival (AoA) estimation system. Our intuitive, two-phases cross-correlation based system requires a switched beam antenna array with a single radio frequency ...
Mohamed, Amr, Daniele Trinchero, Amr Mohamed, Ahmed Badawy, Badawy, Ahmed, TRINCHERO, Daniele, Tarek ElFouly, BADAWY, AHMED MOHAMED HABELROMAN B M, Khattab, Tamer, Elfouly, Tarek, Tamer Khattab   +10 more
core   +1 more source

Cascade AOA Estimation Algorithm Based on Flexible Massive Antenna Array

Sensors, 2020
The Angle-of-Arrival (AOA) has a variety of applications in civilian and military wireless communication fields. Due to the rapid development of the location-based service (LBS) industry, the importance of the AOA estimation technique has increased ...
Tae-yun Kim, Suk-seung Hwang
doaj   +1 more source