Results 21 to 30 of about 589 (217)

Influence of Fe Particle Size Distribution on Chemical Homogeneity, Microstructure, and Crack Formation in Fe–SiC Powder Blends Processed by PBF‐LB/M

Advanced Engineering Materials, EarlyView.
The influence of Fe particle size on in situ alloying of Fe–SiC powder blends in PBF‐LB/M is revealed. Contrary to expectations, the coarser Fe fraction provides a broader crack‐free processing window and slightly improved elemental homogeneity while producing higher but more variable hardness. The results highlight a complex trade‐off between particle
Anna Luise Strauch, Anastasiya Toenjes, Matthias Steinbacher   +2 more
wiley   +1 more source

Improving the Wet Refractivity Estimation Using the Extremely Learning Machine (ELM) Technique

Atmosphere, 2023
Constructing accurate models that provide information about water vapor content in the troposphere improves the reliability of numerical weather forecasts and the position accuracy of low-cost Global Navigation Satellite System (GNSS) receivers. However,
Ehsan Forootan, Masood Dehvari, Saeed Farzaneh, Sedigheh Karimi   +3 more
doaj   +1 more source

Optoelectronic Synaptic Devices Using Molecular Telluride Phase‐Change Inks for Three‐Factor Learning

Advanced Functional Materials, EarlyView.
Optoelectronic synaptic devices based on solution‐processed molecular telluride GST‐225 phase‐change inks are demonstrated for three‐factor learning. A global optical signal broadcast through a silicon waveguide induces non‐volatile conductance updates exclusively in locally electrically flagged memristors.
Kevin Portner, Dhananjeya Kumaar, Giacomo Torti, Killian Keller, Till Zellweger, Florian M. Schenk, Christoph Weilenmann, Daniel Chelladurai, Vara Prasad Jonnalagadda, Ghazi Sarwat Syed, Vanessa Wood, Jürg Leuthold, Alexandros Emboras, Maksym Yarema, Mathieu Luisier   +14 more
wiley   +1 more source

Atmospheric refractivity estimation from AIS signal power using the quantum-behaved particle swarm optimization algorithm

Open Geosciences, 2019
This paper proposes a new refractivity profile estimation method based on the use of AIS signal power and quantum-behaved particle swarm optimization (QPSO) algorithm to solve the inverse problem.
Tang Wenlong, Cha Hao, Wei Min, Tian Bin, Ren Xichuang   +4 more
doaj   +1 more source

Advances in Sustainable and Wearable Textile Based Soft Robotics

Advanced Functional Materials, EarlyView.
This Review examines advances in wearable textile‐based soft robotics, focusing on sustainable materials, integrated sensing, and scalable actuation. It discusses manufacturing and system integration across healthcare, assistive robotics, prosthetics, and human–machine interfaces, and highlights key challenges in circular design, including life‐cycle ...
Zahir Abbas, Marzia Dulal, Sophia K. Novoselov, Victoria K. Novoselov, Kostya S. Novoselov, Shaila Afroj, Nazmul Karim   +6 more
wiley   +1 more source

Evaluation of daily tropospheric radio refractivity, refractivity gradient and geoclimatic factor over Otukpo, Benue State, Nigeria

African Scientific Reports
Radio refractivity is a key parameter for reliable terrestrial microwave-link design because the tropospheric propagation of radio waves is strongly affected by atmospheric refractive properties.
Emmanuel Daniel Onoja, Andrew Ichoja, Anthony Odeh Ejila, Majesty Oche Omikpa, Emmanuel Vezua Tikyaa, Elijah E. Onwoke, Jack Zuhumnan Kevin   +6 more
doaj   +1 more source

Humidity Profiles Retrieved From GNSS Radio Occultations by a Non-negative Residual Constrained Least Square Error Method

Frontiers in Earth Science, 2020
We performed some refinements to the Boundary Profile eValuation (BPV) method, developed by Vespe and collaborators (Vespe et al., 2004; Vespe and Persia, 2006; Vespe, 2016), for the retrieval of vertical atmospheric humidity profiles from Radio ...
Andrea Andrisaniand, Andrea Andrisaniand, Francesco Vespe   +2 more
doaj   +1 more source

Bio‐Inspired Synthesis of Macroporous Single Crystal Particles as Scattering Agents

Advanced Functional Materials, EarlyView.
A general strategy is presented that delivers unique, single‐crystal microparticles that combine submicron macroporosity and uniform particle shapes. A bioinspired approach is used to occlude three distinct types of additives – polystyrene microspheres, polymer vesicles and amino acids – within calcite single crystals, and subsequent thermal annealing ...
Stephanie E. Foster, Gianni Jacucci, Ouassef Nahi, Thomas Kress, Zabeada Aslam, Stuart Micklethwaite, Alexander N. Kulak, Rik Drummond‐Brydson, Melinda J. Duer, Yi‐Yeoun Kim, Silvia Vignolini, Fiona C. Meldrum   +11 more
wiley   +1 more source

Temporal Analysis of Radio Refractivity Variation over Kaduna: Implications for Radio Wave Communication Systems

UMYU Scientifica Journal
Surface radio refractivity is a crucial parameter in studying radio wave communication as it quantifies the bending of electromagnetic waves by atmospheric factors.
Aminu Yaradua Sabiru, Akinbolati Akinsanmi, Florence N Ikechiamaka   +2 more
doaj   +1 more source

An update to the expression of atmospheric refractivity for GNSS signals [PDF]

Atmospheric Measurement Techniques
This study revisits previous formulations of atmospheric refractivity at L-band frequencies, focusing on signals from Global Navigation Satellite Systems (GNSS).
J. M. Aparicio
doaj   +1 more source