Results 51 to 60 of about 64,082 (287)

Aeroacoustic analysis of main rotor-tail rotor interaction [PDF]

, 2008
The increased restrictions placed on helicopter noise levels over recent decades have encouraged manufacturers to better understand tail rotor noise and its aerodynamic sources. A generic single main rotor and tail rotor helicopter has been simulated in high speed forward, and quartering, flight using the Vorticity Transport Model.
Fletcher, Timothy M., Duraisamy, Karthikeyan, Brown, Richard   +2 more
openaire  

Soft and Adhesive Cardiac Patch for Electrophysiological and Contraction Measurement

Advanced Science, EarlyView.
This study developed an epicardial electronic patch with a modulus similar to that of the heart (approximately 65kPa), which can collect stable electrocardiogram signals and myocardial contractility on the surface of a dynamically beating heart. This is attributed to the hydrogen bond interaction formed between the amino and catechol groups in the ...
Wuliang Chen, Xinyu Shen, Hanning Liu, Lamei Du, Caicai Jiao, Longfei Li, Qian Wang, Qiuting Zhang, Lixue Tang, Liang Hu, Yubo Fan   +10 more
wiley   +1 more source

Determination of the Tail Unit Parameters of Ultralight Manned and Unmanned Helicopters at the Preliminary Design Stage

Aerospace
The 1–2 seat helicopters have developed considerably in recent years. They have a maximum take-off weight of 250 to 750 kg. Most of these helicopters have been converted into unmanned versions.
Vitaly Dudnik
doaj   +1 more source

Secreted Nonstructural Protein 3 is a Pathogenic Determinant of Orbivirus

Advanced Science, EarlyView.
This study uncovers a conserved PIP2‐dependent secretory pathway of orbivirus NS3 that induces vascular leakage. Pharmacological disruption of PIP2‐NS3 interaction significantly reduces viral pathogenicity and provides protective efficacy in murine models, establishing PIP2‐mediated NS3 secretion as both a key virulence determinant and a promising ...
Junyong Guan, Dong Zhou, Ran Shao, Xing Liu, Jin Peng, Yingran Huang, Shuhui Qi, Cankun Xi, Menghang Wang, Bin Sun, Yinglin Qi, Xin Yin   +11 more
wiley   +1 more source

Flying control of small-type helicopter by detecting its in-air natural features

Journal of Electrical Systems and Information Technology, 2015
Control of a small type helicopter is an interesting research area in unmanned aerial vehicle development. This study aims to detect a more typical helicopter unequipped with markers as a means by which to resolve the various issues of the prior studies.
Chinthaka Premachandra, Satoshi Takagi, Kiyotaka Kato   +2 more
doaj   +1 more source

Concurrently Achieving 4.6 W/M2 and 120,000 Cyclability Enabled by Extendable Swing Arms in Rotational Triboelectric Nanogenerator

Advanced Science, EarlyView.
A rotational energy harvesting device that successfully reconciles high power density with mechanical durability through a hybrid sliding‐and‐bouncing kinematic mechanism is reported. The success reported in our paper includes addressing a dilemma where enhanced electrical output comes at the cost of increased friction and wear, limiting the practical ...
Yihong Lin, Jiaming Zhou, In‐Yong Suh, Eunjong Kim, Kin Chiu Yip, Dae‐jin Kim, Jang‐Mook Jeong, Young‐Jun Kim, Jinyoung Jeon, Ju‐Hyuck Lee, Yoon‐Hwae Hwang, Sang‐Woo Kim, Dong‐Myeong Shin   +12 more
wiley   +1 more source

COMPARATIVE STUDY ON CALCULATION RESULTS OF THREE-BLADE AND X-SHAPED TAIL ROTOR AT "VORTEX RING"

Научный вестник МГТУ ГА, 2016
The article presents the results of numerical studies of aerodynamic characteristics of isolated three-bladed tail rotor, and X-shaped tail rotor at "vortex ring".
Y. M. Ignatkin, P. V. Makeev, A. I. Shomov, V. A. Ivchin   +3 more
doaj  

GLS1 Orchestrates Exosome‐Mediated Tumor‐Endothelial Communication to Facilitate Angiogenesis

Advanced Science, EarlyView.
This study reveals a previously unappreciated, non‐metabolic function of GLS1 in the control of tumor angiogenesis via exosome‐mediated CAV1‐TNC signaling, indicating that therapeutic targeting of GLS1 may offer a dual benefit by simultaneously suppressing tumor metabolic activity and angiogenic processes in head and neck cancer. ABSTRACT Glutaminase 1
Jianqiang Yang, Zhenzhen Fu, Fanghui Chen, Soumya Vijaya Kumar, Fan Yang, Yaochao Zheng, Yunqi Li, Yao Yao, Nabil F. Saba, Yong Teng   +9 more
wiley   +1 more source

Lactoferrin Deficiency During Lactation Causes Adult Obesity‐Related Metabolic Disease Through Persistent Adipose Dysfunction Driven by Impaired Adipocyte Development

Advanced Science, EarlyView.
Lactational lactoferrin deficiency exerts lasting effects on epididymal adipose tissue development from lactation into adulthood: it impairs adipocyte hyperplasia and induces pathological hypertrophy, resulting in lower body weight yet exacerbated metabolic dysfunction under a high‐fat diet in adulthood.
Qin An, Yunxia Zou, Wenli Wang, Zhimei Cheng, Zhuoxing Zhang, Ruwei Liu, Xiong Wang, Kunlun Huang, Fangrong Ding, Yunping Dai, Qingyong Meng, Yali Zhang   +11 more
wiley   +1 more source

Design of a Symmetrical Quad-rotor Biplane Tail-Sitter Aircraft without Control Surfaces and Experimental Verification

MATEC Web of Conferences, 2018
This paper presents the design of a symmetrical quad-rotor biplane tail-sitter VTOL UAV (Vertical Take-off and Landing Unmanned Aerial Vehicle) which is composed of four rotors and two symmetrically mounted fixed wings.
Wang Hongyu, Zhao Xun, Bai Hui, Lu Cunyue, Zhang Baomin, Li Cong   +5 more
doaj   +1 more source