Results 71 to 80 of about 54,718 (284)

Phasing the Mirror Segments of the Keck Telescopes: The Broadband Phasing Algorithm [PDF]

open access: yes, 1998
To achieve its full diffraction limit in the infrared, the primary mirror of the Keck telescope (now telescopes) must be properly phased: The steps or piston errors between the individual mirror segments must be reduced to less than 100 nm. We accomplish
Chanan, Gary   +6 more
core   +1 more source

Advanced Ceramics in Aerospace and Defense: The Interrelationship between Traditional and Additive Manufacturing Approaches

open access: yesAdvanced Materials Technologies, EarlyView.
Additive manufacturing revolutionizes production by enabling on‐demand, customized, and sustainable manufacturing with streamlined supply chains. While metal and polymer AM are well‐established, advanced ceramic AM is rapidly emerging, overcoming traditional material challenges.
Kateryna Oleksandrivna Shvydyuk   +2 more
wiley   +1 more source

Advanced Branched Carbon Nanotube/Carbon Black Hybrid Technologies: Cost‐Effective Fabrication of High‐Performance Conductive Polyamide 6 Filaments for Next‐Generation Smart Textile Applications

open access: yesAdvanced Materials Technologies, EarlyView.
This study demonstrates a cost‐effective hybrid nanofiller approach for developing conductive polyamide 6 filaments via melt spinning. Branched carbon nanotubes combined with carbon black create synergistic networks where spherical CB particles bridge aligned CNTs, maintaining electrical pathways during fiber drawing.
Müslüm Kaplan   +3 more
wiley   +1 more source

Non-equilibrium umbrella sampling applied to force spectroscopy of soft matter [PDF]

open access: yes, 2015
Physical systems often respond on a timescale which is longer than that of the measurement. This is particularly true in soft matter where direct experimental measurement, for example in force spectroscopy, drives the soft system out of equilibrium and ...
Evans, Denis J.   +5 more
core   +1 more source

Overcoming Printing and Interfacial Challenges in Liquid Metal Direct Writing for Integrated Stretchable Electronics

open access: yesAdvanced Materials Technologies, EarlyView.
Liquid metal direct writing is advanced from a technological and fundamental point. Utilizing a kinematic bed, printing on large surfaces with irregularities is enabled. Furthermore, a pressure‐driven flow during printing is discovered that affects the thickness of traces.
Maximilian Krack   +15 more
wiley   +1 more source

A fast numerical method based on static reduction for the solution of the contact problem of the piston ring

open access: yes矿业科学学报, 2017
This paper provides a fast method based on static reduction for the solution of the displacements of the piston ring's contact nodes. The nodal displacements and the corresponding nodal forces of the contact nodes are connected by the contact stiffness ...
Liu Yuwei, Li Heyan, Ye Fuhao
doaj  

Research of the Frictional Characteristics of Piston Ring - Cylinder Liner Based on GT-Suite

open access: yesMATEC Web of Conferences, 2018
Establish the piston ring-cylinder liner frictional model using the software of GT-Suite combine both of the frictional condition and lubrication, analyze and compute the thickness of oil film between piston ring and cylinder liner, the distribution of ...
SHI Chao-fan   +4 more
doaj   +1 more source

Transition of a vortex ring measured by 3D scanning Tomo-PIV [PDF]

open access: yes, 2016
A vortex ring with piston-based Reynolds number Rep=4650 is studied experimentally by means of time-resolved scanning tomographic PIV. The present measurement technique provides the so-called 4D flow field, thus enables revealing the vortex ring’s ...
Bruecker, C., Pointz, B., Sun, Z.
core  

Adhesive Double‐Network Granular Organogel E‐Skin

open access: yesAdvanced Materials Technologies, EarlyView.
We introduce a double‐network granular organogel adhesive for electronic skin, overcoming adhesion and strength trade‐offs. It provides reversible, robust bonding and ionic conductivity, enabling wearable and soft robotic e‐skin. Thanks to the e‐skin adhesive, a soft robotic trunk can recognize touch, temperature, humidity, and acidity.
Antonia Georgopoulou   +4 more
wiley   +1 more source

Setting up a Measurement Device for Tribological Studies in the Piston Assembly

open access: yesInternational Journal of Automotive Engineering, 2018
Within the FVV-Project Piston Ring Oil Transport a novel research engine was developed for the investigation of the lubricating oil management in the piston assembly.
Georg Wachtmeister   +4 more
doaj   +1 more source

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