Results 51 to 60 of about 39,732 (296)

Empirical measurements of small unmanned aerial vehicle co-axial rotor systems [PDF]

, 2011
Small unmanned aerial vehicles (SUAV) are beginning to dominate the area of intelligence, surveillance, target acquisition and reconnaissance (ISTAR) in forward operating battlefield scenarios.
Bell, Jonathon, Prior, Stephen D.
core  

Electroactive Metal–Organic Frameworks for Electrocatalysis

Advanced Functional Materials, EarlyView.
Electrocatalysis is crucial in sustainable energy conversion as it enables efficient chemical transformations. The review discusses how metal–organic frameworks can revolutionize this field by offering tailorable structures and active site tunability, enabling efficient and selective electrocatalytic processes.
Irena Senkovska, Yutong Luo, Ruyan Zhao, Jianjun Zhang, Mingchao Wang, Xinliang Feng, Eike Brunner, Stefan Kaskel   +7 more
wiley   +1 more source

Analysis of the aerodynamic performance of a twin-propelled wall-climbing robot based on computational fluid dynamics method

AIP Advances, 2022
We present a twin-propelled wall-climbing robot that can stably adsorb and move quickly on a vertical wall by exploiting the propeller’s reverse thrust as the adsorption force and the wheel as the movement method.
Peng Liang, Xueshan Gao, Rui Gao, Qingfang Zhang, Mingkang Li   +4 more
doaj   +1 more source

Photoswitching Conduction in Framework Materials

Advanced Functional Materials, EarlyView.
This mini‐review summarizes recent advances in state‐of‐the‐art proton and electron conduction in framework materials that can be remotely and reversibly switched on and off by light. It discusses the various photoswitching conduction mechanisms and the strategies employed to enhance photoswitched conductivity.
Helmy Pacheco Hernandez, Stefan Hecht, Wolfgang Wenzel, Lars Heinke, Mariana Kozlowska   +4 more
wiley   +1 more source

Formation of Stable Amorphous Calcium Phosphate and Collagen Assemblies by a Versatile Spray‐Drying Approach

Advanced Functional Materials, EarlyView.
Amorphous calcium phosphate (ACP) microparticles with long‐term and thermal stability are prepared with or without collagen using a scalable one‐pot spray‐drying process. Under simulated physiological conditions, they crystallize into biomimetic bone mineral and, when combined with collagen, form extrudable, fibrillar bone‐like 3D constructs.
Camila Bussola Tovani, Nessma Bennaceur, Celina Benkhellat, Tristan Georges, Clara Doisneau, Vaskar Sardhalia, Thierry Azaïs, Flora Lemaire, Halima Kerdjoudj, Mohamed Selmane, Capucine Sassoye, Marie Albéric, Cédric Boissière, Nadine Nassif   +13 more
wiley   +1 more source

DECREASE OF DYNAMIC STRESSES LEVEL IN ROTOR BLADES OF THE TURBINE AT THE EXPENSE OF A OPTIMISATION OF NOZZLE VANES GEOMETRY

Авіаційно-космічна техніка та технологія, 2018
Interacting between the next rows of the turbine creates a circumferential flow non-uniformity, which leads to origination of resonance dynamic stresses on rotor bladings with frequencies z·fn, where fn - a rotor rotation frequency, z - number of stator ...
Юрий Петрович Кухтин, Петр Петрович Варварук, Вячеслав Михайлович Меркулов   +2 more
doaj   +1 more source

Interlaminar stress analysis for carbon/epoxy composite space rotors

The International Journal of Multiphysics, 2011
Este documento amplía los trabajos anteriores que aparecen en el International Journal of Multiphysics, Varatharajoo, Salit y Goh (2010).Un enfoque que incorpora la técnica de modelado de zona cohesiva se incorpora en un volante optimizado para simular adecuadamente las tensiones en las interfaces de las capas.
Chengjie Lian, Renuganth Varatharajoo, Nurulasikin Mohd Suhadis   +2 more
openaire   +2 more sources

Color Routing and Beam Steering of Single‐Molecule Emission with a Spherical Silicon Nanoantenna

Advanced Functional Materials, EarlyView.
We experimentally demonstrate broadband directional emission from single molecules using a single spherical silicon nanoparticle assembled via DNA origami. By varying nanoparticle (NP) size and emitter position, we achieve unidirectional emission, beam steering, and color routing at the nanoscale, revealing modal interference as the underlying ...
María Sanz‐Paz, Nicole Siegel, Guillermo Serrera, Javier González‐Colsa, Fangjia Zhu, Karol Kołątaj, Minoru Fujii, Hiroshi Sugimoto, Pablo Albella, Guillermo P. Acuna   +9 more
wiley   +1 more source

Aero-acoustic performance of a continuous transonic wind-tunnel axial-flow compressor

Xibei Gongye Daxue Xuebao, 2022
A three-stage axial-flow compressor was developed for a continuous transonic wind tunnel. The rotor-stator spacing and the ratio of number of rotor blades to number of stator vanes were properly chosen for the purpose of aero-acoustic noise suppression ...
LONG Bingxiang, CHEN Jiming, CHEN Zhenhua, LIU Zongzheng, LIAO Daxiong   +4 more
doaj   +1 more source

Dispensing Volumetric Additive Manufacturing

Advanced Functional Materials, EarlyView.
Dispensing volumetric additive manufacturing (DVAM) prints 3D structures inside a photocurable resin droplet suspended from the tip of a glass pipette, enabling sequential printing without resin vats or manual part removal. Real‐time droplet profiling and ray‐tracing‐based correction compensate for optical distortion at the curved resin‐air interface ...
Hongryung Jeon, Yunsoo Lee, Seobin Park, Kyung‐Hwan Kim, Junyoung Seo, Im Doo Jung   +5 more
wiley   +1 more source