Results 111 to 120 of about 32,905 (294)

Defect‐Engineered ZnO Nanowire Arrays for Flexible Room‐Temperature Hydrogen Sensors

open access: yesAdvanced Materials Technologies, EarlyView.
Fabrication process of patterned ZnO nucleation sites on a flexible polyimide (PI) substrate. Top/tilted‐view SEM images of ordered ZnO nanoflower arrays confined within patterned circular regions. AFM topography map with height data revealing a disk‐array structure, where the patterned regions (marked by a red dot circle) are elevated by ∼2 µm ...
Jun‐Ting Wang   +7 more
wiley   +1 more source

Programmable Crack Networks for Wide‐Range and Reversible Strain Sensing in Vertically Oriented van der Waals Molybdenum Disulfide Thin Films

open access: yesAdvanced Materials Technologies, EarlyView.
Vertically oriented van der Waals MoS2 thin films enable a mechanically programmable crack network for strain sensing. The initial mechanical programming protocol establishes a programmed crack configuration along weak interlayer and interdomain interfaces.
Yinli Wang, Hiroyuki Hirakata
wiley   +1 more source

Bibel presents talks on engineering disasters in Seattle, Minneapolis

open access: yes, 2015
University of North Dakota Mechanical Engineering Professor George Bibel, an expert on mass transportation disasters, recently presented invited and sponsored talks on engineering disasters and airplane crashes at the National Society of Profession ...
Dodds, David L.
core   +1 more source

Investigating the aerodynamic and radiation components of the Penman equation for water surface evaporation estimation

open access: yesAgricultural Water Management
Water surface evaporation estimation is a key component of refined water resources management, particularly in arid regions with severe water scarcity. This study improves the classical Penman model in two aspects.
Xin Lei   +4 more
doaj   +1 more source

Do Natural Disasters Affect Human Capital? An Assessment Based on Existing Empirical Evidence [PDF]

open access: yes
The last few years have seen a notable increase in the number of studies investigating the causes and effects of natural disasters in many dimensions. This paper seeks to review and assess available empirical evidence on the ex-post microeconomic effects
Baez, Javier E.   +2 more
core  

Microscale 3D‐Printed Digital Strain Switches for Embedded Mechanical Computation

open access: yesAdvanced Materials Technologies, EarlyView.
Microscale 3D‐printed strain switches on flexible films convert deformation into native digital signals at geometry defined thresholds. A closed form model predicts switching from 3000 to 15 000 microstrain and is validated across 110 devices. Reliable ohmic closure and strain activated AND, OR, and XOR logic point toward low‐power mechanical ...
Regan Kubicek   +3 more
wiley   +1 more source

Influence of wetted perimeters variation of physical cover porosity on the evaporation suppression effect of plains reservoirs in arid zones

open access: yesJournal of Hydrology: Regional Studies
Study region: In arid and semi-arid regions, high evaporation losses from plains reservoirs pose a significant challenge to the effective management of water resources.
Shaolei Wang   +4 more
doaj   +1 more source

Freeform Light Routing in Nearly‐Hyperuniform Slabs: Toward a General‐Purpose Design Platform for Integrated Photonics

open access: yesAdvanced Optical Materials, EarlyView.
Nearly hyperuniform disordered photonic slabs guide light along prescribed freeform pathways without relying on lattice symmetry. A pathway‐first design embeds curved channels within a photonic bandgap hyperuniform network, maintaining high transmission through freeform bends.
Timothy Amoah   +8 more
wiley   +1 more source

Progress, Problems, and Improving Methods of Non-Engineering Countermeasures Against Urban Meteorological Disasters in China

open access: yes, 2017
During China’s rapid urbanization, cities are threatened by ever more severe meteorological disasters. Urban meteorological disasters are characterized by massive destruction, high diffusion, and extensive social impact, which further complicate ...
Yuan XIN   +4 more
core   +1 more source

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

open access: yesAdvanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui   +5 more
wiley   +1 more source

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