Results 101 to 110 of about 23,593 (263)

Beamforming for the Successive Relaying-Based Cooperative Non-Orthogonal Multiple Access Transmission

Applied Sciences
In this paper, a set of cooperative non-orthogonal multiple access (NOMA) transmission schemes is proposed, in which two half-duplex relaying user terminals (UTs) successively deliver the AP signals toward two NOMA UTs.
Duckdong Hwang, Sung Sik Nam, Janghoon Yang, Hyoung-Kyu Song   +3 more
doaj   +1 more source

Experimental and Numerical Modal Analysis of Composite Sandwich Structures Using Surfboards as Model Systems

Advanced Engineering Materials, EarlyView.
This article presents an experimental and numerical modal investigation of composite sandwich structures using surfboards as model systems. By comparing different core materials and reinforcement strategies, the study demonstrates how local stiffeners influence vibrational response and introduce characteristic modal features, highlighting modal ...
Brett Connellan, Luca Lomazzi, Mathis Mercier, Kara Stark, Marc in het Panhuis   +4 more
wiley   +1 more source

Triple Junctions as Dislocation‐Like Defects: The Role of Grain Boundary Crystallography Revealed by Experiment and Atomistic Simulation

Advanced Engineering Materials, EarlyView.
Grain boundary triple junctions are an essential ingredient of the microstructure of polycrystalline materials. In this study, a triple junction is observed using atomic‐resolution scanning transmission electron microscopy and characterized. Computer simulations reveal that the junction has a dislocation character that is determined by the joining ...
Tobias Brink, Saba Saood, Peter Schweizer, Jörg Neugebauer, Gerhard Dehm   +4 more
wiley   +1 more source

Comparison of Libration- and Precession-Driven Flows: From Linear Responses to Broadband Dynamics

Fluids
Libration and precession are different body forces that are ubiquitous in many rapidly rotating systems, particularly in geophysical and astrophysical flows.
Ke Wu, Bruno D. Welfert, Juan M. Lopez
doaj   +1 more source

Design and Analysis of Compression–Torsion Coupling Metamaterials Using the Golden Section Method

Advanced Engineering Materials, EarlyView.
A novel compression–torsion metamaterial is engineered using inclined rods and symmetry breaking. To optimize its torsional performance, the golden section method is employed. The mechanical response of the metamaterial is validated through both numerical analysis and experimental validation.
Amirhossein Hassani, Sara Bagherifard
wiley   +1 more source

The Post‐2020 Surge in Global Atmospheric Methane Observed in Ground‐Based Observations

Earth and Space Science
Methane (CH4) is a potent greenhouse gas with high radiative forcing and a relatively short atmospheric lifetime of around a decade. We used a decade‐long data set (2011–2022) from the Fourier transform spectrometer at the California Laboratory for ...
Jennifer Wu, Sherry Luo, Zhao‐Cheng Zeng, Debra Wunch, Omaira E. García, Frank Hase, Rigel Kivi, Hirofumi Ohyama, Isamu Morino, Ralf Sussmann, Markus Rettinger, Yao Té, Nicholas M. Deutscher, David W. T. Griffith, Kei Shiomi, Cheng Liu, Justus Notholt, Laura T. Iraci, David F. Pollard, Thorsten Warneke, Coleen Roehl, Thomas J. Pongetti, Stanley P. Sander, Yuk L. Yung   +23 more
doaj   +1 more source

Influence of Scan Strategies in Electron Beam Powder Bed Fusion on Solidification, Microstructure, and High‐Temperature Compressive Properties of γ′‐Strengthened Inconel 738LC

Advanced Engineering Materials, EarlyView.
Experiments and thermophysical simulations were conducted to investigate the electron beam powder bed fusion electron beam (PBF‐EB/M) process for the γ′‐strengthened nickel‐based superalloy Inconel 738LC. The results demonstrate the impact of process‐induced microstructural variations on high‐temperature mechanical behavior, providing a basis for ...
Jan Niklas Petenati, Karthik Kumar Banku, Prasanth Bondi, Ivan Zhirnov, Yangyiwei Yang, Gordon Schmidt, Jürgen Christen, Georg Hasemann, Manja Krüger, Bai‐Xiang Xu, Bilal Gökce, Silja‐Katharina Rittinghaus   +11 more
wiley   +1 more source

Efficient Verifiable Credential Aggregation With Blockchain Anchoring and zk-SNARKs

IEEE Access
Traditional digital identity systems struggle with centralization, vulnerability to manipulation, and a lack of transparency. In distributed identity, different cryptographic methods are used for issuing credentials, which create challenges during ...
Istiaque Ahmed, Kentaroh Toyoda, Tadashi Nakano, Thi Hong Tran   +3 more
doaj   +1 more source

Some Properties of Zero Forcing Hop Dominating Sets in a Graph

European Journal of Pure and Applied Mathematics
In this paper, we initiate the study of a zero forcing hop domination in a graph. We establish some properties of this parameter and we determine its connections with other known parameters in graph theory. Moreover, we obtain some exact values or bounds of the parameter on the generalized graph, some families of graphs, and graphs under some ...
Jahiri Manditong, Aziz Tapeing, Javier Hassan, Alcyn R. Bakkang, Nurijam Hanna M. Mohommad, Sisteta U. Kamdon   +5 more
openaire   +1 more source

Continuous Stiffness Graded Metal–Ceramic Femoral Stems: UMAT‐Based Design and Finite Element Assessment

Advanced Engineering Materials, EarlyView.
Functionally graded metal–ceramic femoral stems are engineered through continuous UMAT‐based stiffness tailoring, eliminating discrete material interfaces while enhancing biomechanical compatibility. Low‐index power‐law gradation optimizes load transfer, reduces stress shielding, and controls implant–bone micromotion, highlighting a materials‐design ...
Rihem Nouira, Sameh Elleuch, Hanen Jrad
wiley   +1 more source