Results 191 to 200 of about 7,367,624 (346)

A time-stratified case-crossover study on association between short-term exposure to air pollutants and myocardial infarction mortality in Shenzhen

open access: yes环境与职业医学
BackgroundAir pollution remains a critical public health issue, with persistent exposure to air pollutants continuing to pose significant health risks.
Ziyang ZOU   +7 more
doaj   +1 more source

Fabrication and Optimization of Ti₃C₂Tx MXene Thin Films for Next‐Generation Lab‐on‐Chip Devices

open access: yesAdvanced Materials Interfaces, EarlyView.
A parametric study explores patterned Ti₃C₂Tx MXene (TMX) thin films for microfluidic and lab‐on‐chip applications. TMX is spin‐coated and patterned on cyclic olefin copolymer (COC) substrates, achieving conductive, transparent, and flexible electrodes.
Marwan Taha   +6 more
wiley   +1 more source

Intraday effects of ambient PM1 on emergency department visits in Guangzhou, China: A case-crossover study.

open access: yesScience of the Total Environment, 2021
Linjiong Liu   +10 more
semanticscholar   +1 more source

High Aspect Ratio, Superconducting Vacuum Gap Capacitor NEMS with Plate Distances Down to 32 nm

open access: yesAdvanced Materials Technologies, EarlyView.
Fabrication of aluminium vacuum gap capacitor based NEMS is investigated with a free to move top electrode. To avoid collapse of the top electrode vertical stress gradient is controlled through sputter parameters. The result is wafer‐level high‐yield fabrication of vacuum gap capacitors with radii between 7 µm and 30 µm and integrated piezoactuators. A
Ioan Ignat, Daniel Platz, Ulrich Schmid
wiley   +1 more source

Optimizing Metamaterial Inverse Design with 3D Conditional Diffusion Model and Data Augmentation

open access: yesAdvanced Materials Technologies, EarlyView.
A generative AI model, the 3D conditional diffusion model (3D‐CDM), is introduced to enhance the inverse design of voxel‐based metamaterials. A data augmentation technique based on topological perturbation expands the dataset, further improving generation quality and accuracy.
Xiaoyang Zheng   +2 more
wiley   +1 more source

Development of a Miniaturized Capillary Rheometer for High Shear Rate Rheology of Dense Suspensions

open access: yesAdvanced Materials Technologies, EarlyView.
This research presents a downscaled benchtop, low‐cost capillary rheometer that can characterize high shear rate rheometry of dense suspensions. The device is capable of measuring across a wide range of applicable shear rates using only a limited quantity of material and addresses a need for an accurate and affordable capillary rheometer.
John P. Reynolds   +6 more
wiley   +1 more source

Dynamic Structural Colors in Cholesteric Cellulose Composites: Achieving Spatial and Temporal Control

open access: yesAdvanced Optical Materials, EarlyView.
By combining static and time‐resolved optical, structural, and rheological techniques, we demonstrate that the blue‐shift upon solidification of ethyl cellulose‐acrylic acid mesophases corresponds to the reorientation of cholesteric domains. Modulating the mesophase chain mobility and photopolymerization reaction kinetics enables solid chiral nematic ...
Simona G. Fine   +2 more
wiley   +1 more source

Thermal‐Energy‐Boosted Luminescence for Precise Optical Thermometry in Eu/Tb‐Doped ScNbO4

open access: yesAdvanced Optical Materials, EarlyView.
This paper presents a novel phosphor for high‐performance optical thermometry utilizing thermal‐energy‐assisted luminescence boosting. The samples are prepared by incorporating Eu‐doped ScNbO4 and Tb‐doped ScNbO4 powders into a PDMS matrix. Under blue light excitation, the sample exhibits a stunning emission color change from green to red as the ...
Sangwon Wi   +3 more
wiley   +1 more source

Criteria for identifying acute respiratory events based on FEV1 decline in home spirometry for lung transplant patients

open access: yesBMC Pulmonary Medicine
Background Lung transplantation is a critical treatment for end-stage lung diseases, but long-term survival is challenged by graft rejection and infection.
Yoshikazu Shinohara   +5 more
doaj   +1 more source

High‐Isolation LCoS‐Based Optical Switch with Phase Hologram Parameter Optimization

open access: yesAdvanced Photonics Research, EarlyView.
A 1 × 9 liquid crystal on silicon (LCoS)‐based optical switch is experimentally demonstrated, revealing that the worst‐case port isolation exceeds 37 dB within the wavelength range of 1460–1540 nm. This work offers an alternative route for the development of optical switches with a large number of ports and high isolation, applicable to large‐capacity ...
Linbojie Huang   +8 more
wiley   +1 more source

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