Results 81 to 90 of about 156,957 (301)

Perfusion Bioreactor Culture Incorporating Mechanical Confinement Enhances Mesenchymal Stem Cell Extracellular Vesicle Production and Wound Healing Potential

open access: yesAdvanced Materials Technologies, EarlyView.
Scalable manufacturing challenges and limited potency remain two of the most intransigent issues limiting clinical translation of EV therapeutics. Mechanical cues can induce phenotypic changes and increased vesiculation in EV source cells without the use of extraneous reagents, chemicals, and/or cargo, thereby potentially drastically improving the ...
Emily H. Powsner   +10 more
wiley   +1 more source

Index to NASA Tech Briefs, January - June 1966 [PDF]

open access: yes, 1966
Index to NASA technological innovations for January-June ...

core   +1 more source

Anti‐Slip Material‐Based Strategies and Approaches

open access: yesAdvanced 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   +3 more
wiley   +1 more source

Characterization of non-linear bearings using the Hilbert–Huang transform

open access: yesAdvances in Mechanical Engineering, 2015
Changes in the performance of bearings can significantly vary the distribution of internal forces and moments in a structure as a result of environmental or operational loads.
Arturo González, Hussein Aied
doaj   +1 more source

Lead-rubber hysteretic bearings suitable for protecting structures during earthquakes [PDF]

open access: yesSeismic Isolation and Protective Systems, 2011
Lead-rubber hysteretic bearings provide in a single unit the combined features of vertical load support, horizontal flexibility and energy absorbing capacity required for the base isolation of structures from earthquake attack. The lead-rubber hysteretic bearing is a laminated elastomeric bearing of the type used in bridge structures, with a lead plug ...
openaire   +1 more source

Numerical static analysis of the curtain wall with light steel structure [PDF]

open access: yes, 2017
This paper presents a numerical analysis of the effect of wind on the curtain wall in a high building. Two types of curtain wall were adopted: made of thin-wall C sections with nominal dimensions and the section that takes into consideration lower ...
Kosiń, Mariusz   +2 more
core   +1 more source

Development of Heat Engines Powered by Twisted and Coiled Polymer Fiber Actuators

open access: yesAdvanced Materials Technologies, EarlyView.
Continuously rotating engines driven by thermally responsive actuating materials can turn waste heat into useful energy. For the first time heat engines operated by twisted and coiled polymer fiber actuators are demonstrated with engine design guided by two simple analytical models.
Geoffrey M. Spinks   +2 more
wiley   +1 more source

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

Comparative Analysis of Hybrid Bearing Layouts for Seismic Enhancement of Simply-Supported-to-Continuous Bridges

open access: yesBuildings
Seismic design for multi-span simply supported to continuous (SSC) bridges is complicated by the vulnerability of continuity joints and the interaction between substructure stiffness and superstructure dynamics.
Shuang Gong   +4 more
doaj   +1 more source

Index to 1981 NASA Tech Briefs, volume 6, numbers 1-4 [PDF]

open access: yes, 1986
Short announcements of new technology derived from the R&D activities of NASA are presented. These briefs emphasize information considered likely to be transferrable across industrial, regional, or disciplinary lines and are issued to encourage ...

core   +1 more source

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