Results 41 to 50 of about 17,125 (245)

A method for lift coefficient estimation of a pantograph using sparse modelling

Nihon Kikai Gakkai ronbunshu, 2018
It is necessary for pantographs of Japanese high-speed trains to satisfy both low noise characteristics and insensitive lift force characteristics toward the variation in wind direction and in the shape of pantograph head due to wear.
Yoshitaka YAMASHITA, Takeshi MITSUMOJI, Takayuki USUDA   +2 more
doaj   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

A Bio-Inspired Flapping Wing Rotor of Variant Frequency Driven by Ultrasonic Motor

Applied Sciences, 2020
By combining the flapping and rotary motion, a bio-inspired flapping wing rotor (FWR) is a unique kinematics of motion. It can produce a significantly greater aerodynamic lift and efficiency than mimicking the insect wings in a vertical take-off and ...
Si Chen, Le Wang, Shijun Guo, Chunsheng Zhao, Mingbo Tong   +4 more
doaj   +1 more source

A Conceptual Design and Optimization Approach for Distributed Electric Propulsion eVTOL Aircraft Based on Ducted-Fan Wing Unit

Aerospace, 2022
The distributed electric propulsion (DEP) eVTOL aircraft has gained rising interest for its promising potential in high-speed cruise compared with conventional tilt-rotor configuration.
Tielin Ma, Xiangsheng Wang, Nanxuan Qiao, Zilun Zhang, Jingcheng Fu, Mingmin Bao   +5 more
doaj   +1 more source

Diversity and complexity in neural organoids

FEBS Letters, EarlyView.
Neural organoid research aims to expand genetic diversity on one side and increase tissue complexity on the other. Chimeroids integrate multiple donor genomes within single organoids. Self‐organising multi‐identity organoids, exogenous cell seeding, or enforced assembly of region‐specific organoids contribute to tissue complexity.
Ilaria Chiaradia, Madeline A. Lancaster
wiley   +1 more source

Aerodynamic Investigation for a Propeller-Induced Lift-Enhancing Vertical Take-Off and Landing (VTOL) Configuration

Drones
Difficulty in thrust-matching between the cruise and vertical take-off and landing (VTOL) phases is one of the prominent issues faced by conventional VTOL fixed-wing drones.
Hongbo Wang, Guangjia Li, Jie Li, Junjie Zhuang   +3 more
doaj   +1 more source

The human gut microbiome across the life course

FEBS Letters, EarlyView.
Despite significant individual variation and continuous change throughout life, the human gut microbiome follows some life stage‐specific trends. This article provides a brief overview of how gut microbiome composition shifts across different phases of life. Created in BioRender. Özkurt, E. (2026) https://BioRender.com/8q4nrnc.
Alise J. Ponsero, Basak Bahcivanci, Antonietta Hayhoe, Animesh Acharjee, Ezgi Özkurt   +4 more
wiley   +1 more source

Self-aligned MESFETs by a dual-level double-lift-off substitutional gate (DDS) technique for high-speed low-power GaAs ICs

Electronics Letters, 1985
A new self-aligned substitutional gate processing technique which involves dual-level resist patterning was developed for 75 mm (3 in)-diameter GaAs MESFETs IC fabrication. The transconductance of 1 μm gate length DDS E-MESFETs reached a maximum value of 280 mS/mm.
M.F. Chang, F.J. Ryan, R.P. Vahrenkamp, C.G. Kirkpatrick   +3 more
openaire   +1 more source

Degradation mechanism of the von Willebrand factor A2 domain by nattokinase

FEBS Letters, EarlyView.
Nattokinase, a natto‐derived protease, exhibits potent antithrombotic effects. This study demonstrates that nattokinase directly cleaves the von Willebrand factor (vWF) A2 domain in vitro. Unlike the native regulator ADAMTS13, nattokinase degrades folded vWF independently of shear stress.
Ryuichi Hyakumoto, Masatomo So, Ayako Furukawa, Kenji Sugase   +3 more
wiley   +1 more source

Investigation of Pumped Storage Hydropower Power-Off Transient Process Using 3D Numerical Simulation Based on SP-VOF Hybrid Model

Energies, 2018
The transient characteristic of the power-off process is investigated due to its close relation to hydraulic facilities’ safety in a pumped storage hydropower (PSH).
Daqing Zhou, Huixiang Chen, Languo Zhang
doaj   +1 more source