Results 171 to 180 of about 195,389 (268)
In vitro investigations on prosthetic valve thrombosis by ultrasound phonocardiography
, 2013 OBJECTIVE: Prosthetic valve thrombosis is a serious complication associated with high morbidity and mortality; the early detection of thrombotic formations is crucial for prompt diagnosis and proper therapy. METHODS: Thrombotic deposits were simulated in
PENGO, VITTORIO +7 more
core
Advanced Science, EarlyView.Integrating experimental insights with molecular dynamics simulations, we establish an advanced mathematical model for fluids confined in sub‐10‐nm channels, enabling quantitative prediction of interfacial layer thickness and viscosity by accounting for channel material, temperature, and fluid properties.
Xiang Zhang +3 more
wiley +1 more source
, 2008 Giant cell arteritis (GCA) is a well-known entity, creating aortic valve regurgitation secondary to dilatation of the aortic wall. No direct involvement of the aortic valve leaflets has yet been documented.
Chassot, P.G. +4 more
core
Advanced Science, EarlyView.An origami worm‐inspired robot achieves multimodal locomotion in confined pipelines through mechatronic integration that embeds actuation, control, and communication within each origami module. Large, reversible configuration and dimensional changes enable 25 gaits synthesized by a unified framework across peristaltic, inchworm, and wheel‐rolling modes
Qiwei Zhang +6 more
wiley +1 more source
The thermionic valve and its uses for low powered guitar amplification
In accordance with modern day demands for reduced sound pressure levels in recording and live performance situations, this thesis describes researched methods for accurately reproducing the full power ‘valve sound’ at low power.
Aitchison, Michael
core
Modeling the Stiction Effect in Automatic Compressor Valves
, 2012 The so-called stiction effect (or stiction force) is one of the sources of thermodynamic losses in compressor suction and discharge systems. The losses associated with the stiction effect are caused by a deformation of the lubricating oil film between ...
Deschamps, Cesar J. +2 more
core
Advanced Science, EarlyView.Floral meristem (FM) activity is crucial for the initiation of floral organs. In this study, SE represses IPT7 expression and cytokinin signaling via both the miR171c‐5p–KNAT2 and miR164c–CUC1/2–KNAT2 regulatory modules, thereby repressing FM activity. In contrast, STM induces both KNAT2 and IPT7 expression.
Wen Yang +11 more
wiley +1 more source
Chitra heart valve: Results of a multicenter clinical study
, 2001 Background and aim of the study: The Chitra tilting disc valve was developed in India to meet the need for a low-cost cardiac valve. The valve has an integrally machined cobalt-based alloy cage, an ultrahigh molecular-weight polyethylene disc, and a ...
core
Electrohydraulic Folding Ring Actuators for Radially Contracting Applications
Advanced Science, EarlyView.This work presents an Electrohydraulic Folding Ring Actuator that combines high‐performance electrohydraulic actuation with origami‐inspired folding geometry to achieve constricting radial actuation. This integration yields significant inner lumen constriction, alongside a gripping force capable of holding objects exceeding four times the actuator's ...
Gavril Yong En Tan +4 more
wiley +1 more source
A Procedure to Optimize Reed Type Valves Considering Efficiency and Bending Fatigue
, 2012 Reed valves are the most common type of valves used in small compressors due to their simplicity and low cost. Such valves greatly affect the compressor volumetric and isentropic efficiencies and their suitable design is also crucial for reliability ...
Deschamps, Cesar J. +2 more
core