Results 61 to 70 of about 136,664 (227)

Topological Point Defects in SmC* Liquid Crystals Under Mechanical Disturbance

Advanced Materials Interfaces, EarlyView.
Tangetial air jet shear inducess island formation and nucleates topological point defects in uniform SmC films. Island bounded by edge dislocation loops shrink and transform into isolated point defects under continued shear. Mechanical perturbatio provides a controllable route for defect engineering in smectric liquid crystal thin films.
Gunganist Kongklad, Vandana Molahalli, Apichart Pattanaporkratana, Nattaporn Chattham   +3 more
wiley   +1 more source

Optimization-derived blood input function using a kernel method and its evaluation with total-body PET for brain parametric imaging

NeuroImage
Dynamic PET allows quantification of physiological parameters through tracer kinetic modeling. For dynamic imaging of brain or head and neck cancer on conventional PET scanners with a short axial field of view, the image-derived input function (ID-IF ...
Yansong Zhu, Quyen Tran, Yiran Wang, Ramsey D. Badawi, Simon R. Cherry, Jinyi Qi, Shiva Abbaszadeh, Guobao Wang   +7 more
doaj   +1 more source

Anti‐Slip Material‐Based Strategies and Approaches

Advanced Materials Technologies, EarlyView.
This review highlights the principle mechanisms of slipping at the microscale, linking contact mechanics with a friction behavior model for surface interfaces. Main strategies to develop anti‐slip properties to the surfaces are discussed alongside standardized testing approaches.
Sogand Abbaspoor‐Zanjani, Carlo Antonini, Teresa Gatti, Mengjiao Wang   +3 more
wiley   +1 more source

Thermodynamic properties and shear viscosity over entropy density ratio of nuclear fireball in a quantum-molecular dynamics model

, 2013
Thermodynamic and transport properties of nuclear fireball created in the central region of heavy-ion collisions below 400 MeV/nucleon are investigated within the isospin-dependent quantum molecular dynamic (IQMD) model.
Fang, D. Q., Ma, Y. G., Zhang, G. Q., Zhou, C. L.   +3 more
core   +1 more source

A Compact Incubation Platform for Long‐Term Cultivation of Biological Samples for Nitrogen‐Vacancy Center Widefield Microscopy

Advanced Materials Technologies, EarlyView.
A compact incubation platform enables long‐term cultivation of biological samples directly on diamond quantum sensors for NV widefield magnetometry. The 3D‐printed biocompatible chamber provides a temperature controlled, CO2${\rm CO}_2$ and humidity rich environment while accommodating total internal reflection excitation geometry.
Andre Pointner, Daniela Thalheim, Sarah Belasi, Lukas Heinen, Lucas R. Carnell, Christina Janko, Rainer Tietze, Christoph Alexiou, Regine Schneider‐Stock, Roland Nagy   +9 more
wiley   +1 more source

Numerical Simulation Analysis of a Novel Discharge Speed-Regulation Device for Detector in the Pipeline

Shanghai Jiaotong Daxue xuebao
To address the issue of speed control of in-line detector in oil pipelines, a novel discharge speed-regulation device is proposed, which consists of a relief valve seat, a relief valve core, a spring, a guide rod, and other components.
TANG Jian, YU Wenxiu, ZHANG Qiuping, JIAO Xiangdong, DING Xuepeng
doaj   +1 more source

Multiobjective Codesign Optimization of a Planar Pneumatic Artificial Muscle‐Based Snake‐Like Robot for Enhanced Agility and Energy Efficiency

Advanced Robotics Research, EarlyView.
A codesign multiobjective optimization framework was developed to enhance the morphology and controller of a snake‐like robot driven by artificial muscles. It improved planar locomotion, agility, and power efficiency. The approach optimized link geometry and controller gains, revealing that shorter muscles near joints and longer linkages maximize ...
Ayla Valles, Mahdi Haghshenas‐Jaryani
wiley   +1 more source

CFD simulation of flow past MAV wings [PDF]

, 2011
Turbulent flow past low aspect ratio (AR) thin wing used for two different MAV (Micro Air Vehicles) configurations viz. Black Kite and Golden Hawk has been carried out in order to analyze their aerodynamic characteristics.
Kulkarni, DS, Pradeep, Shetty, Rajani, BN, Subrahmanya, MB   +3 more
core  

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

Advanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui, Raphael Zufferey, William Stewart, Mohammad Askari, Simon Jeger, Dario Floreano   +5 more
wiley   +1 more source

Particle Acceleration by Magnetic Reconnection

, 2015
Observational data require a rich variety of mechanisms to accelerate fast particles in astrophysical environments operating under different conditions.
Kowal, Grzegorz, Pino, Elisabete M. de Gouveia Dal   +1 more
core   +1 more source