Results 141 to 150 of about 234,218 (345)

General spectral characteristics of human activity and its inherent scale-free fluctuations

open access: yesScientific Reports
The scale-free nature of daily human activity has been observed in different aspects; however, the description of its spectral characteristics is incomplete.
Bálint Maczák   +2 more
doaj   +1 more source

Enhanced Oxidation and Thermal Shock Resistance of N‐type Mg2Si0.89(Sn0.1,Sb0.01) Thermoelectric Material via Cr0.9Si0.1 Coating

open access: yesAdvanced Engineering Materials, EarlyView.
Cr0.9Si0.1 protective coatings are developed to enhance the thermal‐shock and oxidation resistance of Mg2Si0.89(Sn0.1,Sb0.01) thermoelectric (TE) materials. The coating forms a dense and adherent barrier that suppresses oxygen diffusion and mitigates mechanical degradation during cyclic oxidation, demonstrating its potential to improve the long‐term ...
Mikdat Gurtaran   +3 more
wiley   +1 more source

Can Ti‐Based MXenes Serve as Solid Lubricants for Brake Applications? A Tribological Study

open access: yesAdvanced Engineering Materials, EarlyView.
This study explores the first implementation of Ti‐based MXenes materials in brake pad friction composite material. The resulting composite material exhibits a 48% reduction in the wear rate; alongside significant improvements are observed for thermal and mechanical properties.
Eslam Mahmoud   +7 more
wiley   +1 more source

Observational Evidence of Particle Acceleration by Relativistic Magnetic Reconnection in Gamma-Ray Bursts

open access: yesThe Astrophysical Journal
Gamma-ray bursts (GRBs) as the most energetic explosions in the modern universe have been studied for over half a century, but the physics of the particle acceleration and radiation responsible for their observed spectral behaviors are still not well ...
Cheng-Feng Peng   +3 more
doaj   +1 more source

Design and Prototyping of Topology‐Optimized, Additively Manufactured Lightweight Components for Space Robotic Systems: A Case Study

open access: yesAdvanced Engineering Materials, EarlyView.
The results demonstrate a simulation‐driven workflow that applies LSB topology optimization with additive manufacturing constraints to mission‐specific load cases, integrating European Cooperation for Space Standardization compliant verification and manufacturability to develop structurally efficient rover suspension components.
Stelios K. Georgantzinos   +11 more
wiley   +1 more source

Nitride‐Reinforced Metal Matrix Nanocomposite Powders Production by Plasma‐Assisted Thermochemical Treatment of Intermetallic Powders

open access: yesAdvanced Engineering Materials, EarlyView.
This study proposes a new methodology for producing metal matrix nanocomposites in the solid state. The process involves the plasma‐assisted thermochemical treatment of metallic alloy powders. As a proof‐of‐concept, TiN nanoparticles are synthesized directly on the surface of FeTi intermetallic powder particles, enabling the development of the ...
Deivison Daros Paim   +4 more
wiley   +1 more source

单峰式加速度反应谱规律性偏差统计研究

open access: yesDizhen xuebao
强震动记录显示,加速度反应谱普遍存在幅值大、宽度小的窄峰,这在现有地震动衰减关系(强震动预测方程)未能予以充分呈现。基于日本KiK-net台网近二十万条强震动记录,采用高斯曲线对单峰式加速度反应谱规律性偏差进行了拟合,利用高度、中心周期、宽度等三个参数对单峰式加速度反应谱规律性偏差予以参数化表征,分析了多个地震动、场地条件表征参数与这三个参数间的相关性,并据此建立了单峰式加速度反应谱规律性偏差的经验预测模型。分析结果表明,所建立的单峰式加速度反应谱规律性偏差经验预测模型 ...
Yushi Wang   +4 more
doaj   +1 more source

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