Results 41 to 50 of about 63,330 (315)
Suppression of broadband noise radiated by a low-speed fan in a duct [PDF]
, 2010 Attenuation of ducted fan noise remains a technical challenge in the low frequency range as traditional duct lining becomes ineffective. This study proposes a reactive method to suppress the sound radiation from an axial-flow fan.
Feng, LG, Huang, L, Ma, X
core +1 more source
Advanced Science, EarlyView.We identify a Lepidoptera‐conserved testis‐specific arylalkylamine N‐acetyltransferase (LTNAT) that governs male moth fertility via a novel mechanism. LTNAT loss disrupts eupyrene sperm mitochondrial derivatives and impairs apyrene sperm motility, offering a safe molecular target for innovative pesticides and genetic pest control.
Hao Sun +5 more
wiley +1 more source
Aerospace, 2023 The aerodynamic performances and control characteristics of vertical takeoff and landing aircraft will be significantly affected by the ground effect during takeoff and landing.
Yanxiong Zhao, Yun Tian, Zhiqiang Wan
doaj +1 more source
Inversion of spinning sound fields [PDF]
, 2008 A method is presented for the reconstruction of rotating monopole source distributions using acoustic pressures measured on a sideline parallel to the source axis.
Magalhães M. B. S. +4 more
core +2 more sources
Compliant Polymeric Sheet‐Based Heat Exchangers
Advanced Science, EarlyView.This work presents flexible, transparent, and deployable polymer heat exchangers that achieve a heat transfer capacity per cost up to 4x higher than the state of the art, surpassing both metal and other polymer counterparts. The tube‐on‐tube design enables efficient heat transfer without flow occlusion, while the lightweight, corrosion‐resistant, and ...
Richard J. Fontenot +5 more
wiley +1 more source
Catechol Derivative‐Based Bioadhesives: Molecular Design for Precision Medical Adhesion
Advanced Science, EarlyView.This study utilizes tree‐inspired side‐chain engineering to graft five catechol derivatives onto PVA, systematically revealing how side‐chain length and substituents regulate adhesion and cohesion properties. Among them, the PVA‐CA patch demonstrates superior tissue adhesion, biocompatibility, and promotes regeneration, establishing a programmable ...
Xueyu Wang +8 more
wiley +1 more source
Design and Experiment on Heat Dissipation Structures of Ducted Fan Motor for Flying Electric Vehicle
World Electric Vehicle JournalDucted fan motors play a crucial role in promoting various applications of flying electric vehicles. In ducted fan motor systems, motor performance affects the speed of the fan, the flow field of the fan affects the thermal field of the motor, and the ...
Ye Li +4 more
doaj +1 more source
Albi II – a new generation development [PDF]
MATEC Web of Conferences, 2019 The UL-39 Albi university's all-composite ultralight aircraft project, powered by a piston engine and ducted fan, continues at the Department of Aerospace Engineering at Faculty of Mechanical Engineering CTU in Prague and its partners ZALL JIHLAVAN ...
Theiner Robert, Brabec Jiří
doaj +1 more source
Determination of fan design parameters for light-sport aircraft
Acta Polytechnica, 2022 This paper is focused on the preliminary design of an electric fan for light-sport aircraft. Usage of electric motors brings some advantages compared to piston engines, especially small size and the independence of power on shaft RPM.
Jan Klesa
doaj +1 more source
Bona Fide Intersegmental Plane Hepatectomy Along the Glissonean Branches (BIPHG)
Annals of Gastroenterological Surgery, EarlyView.ABSTRACT This review traces the author's personal journey over three decades in the evolution of liver resection techniques, culminating in the proposal of the Bona Fide Intersegmental Plane Hepatectomy Along Glissonean Branches (BIPHG). Beginning with pioneering experiences in laparoscopic and robotic liver surgeries, the author highlights key ...
Go Wakabayashi, Taiga Wakabayashi
wiley +1 more source