Results 121 to 130 of about 8,412,816 (292)

Slip-energy recovery techniques for control of induction machines.

open access: yes, 1983
This thesis describes two different techniques for efficient control of slip energy in a slip-ring induction machine. The static Kramer system merely recovers slip power and returns it to the a.c. supply.
K. A. M. Nigim (7643153)
core   +4 more sources

Recent Progress in the Phase‐Controlled Synthesis of Ruthenium Nanocrystals for Catalytic Applications

open access: yesAdvanced Materials, EarlyView.
Template effect and kinetic control enable crystal‐phase engineering of Ru nanocrystals, granting access to either metastable fcc‐Ru or stable hcp‐Ru with distinct surface structures, thermal stabilities, and catalytic behaviors. Moreover, the hcp‐Ru can further serve as an epitaxial template to direct Pd and Rh nanocrystals into the metastable hcp ...
Jianlong He   +3 more
wiley   +1 more source

On the application of no-slip lateral boundary conditions to 'coarsely' resolved ocean models

open access: yes, 2011
The problem of no-slip boundary conditions as they apply to ocean models is revisited. It is argued that the setting is consistent with classical Law of the Wall theory.
Hogg, Andrew   +7 more
core   +1 more source

Can Elastomers Combine Stiffness, Toughness and Fatigue Resistance?

open access: yesAdvanced Materials, EarlyView.
This review studies how the molecular and macroscopic architecture of elastomers influence their mechanical properties including: stiffness, stretchability, toughness, fatigue resistance, and damping behavior. By linking the structure to performance, it proposes design principles for advanced elastomeric systems that combine mechanical properties ...
Eva Baur, Esther Amstad
wiley   +1 more source

Effect of boundary slips on thermal EHL in simple sliding finite line contact considering limiting shearing stress

open access: yesFriction
With the advancement of surface technology, boundary slip in lubrication has become increasingly common. However, theoretical analysis in this area remains limited, necessitating further research to explore the impact of boundary slip, particularly ...
Mingyu Zhang, Jing Wang, C. H. Venner
doaj   +1 more source

Fiber‐Format Flexible Linear Electrostatic Motors

open access: yesAdvanced Materials, EarlyView.
A flexible coaxial fibre‐format electrostatic motor enables backdrivable and reversible linear actuation with high force density and functionality under bending, offering a scalable actuation platform for soft and wearable robotics. ABSTRACT Linear motion is fundamental to robotics, yet existing solutions are either rigid electromagnetic motors or ...
Sylvain Schaller, Herbert Shea
wiley   +1 more source

Event-Based Slip Estimation Framework for Space Rovers Traversing Soft Terrains

open access: yesIEEE Access
Estimating terrain-induced longitudinal slip poses a significant challenge in space rover navigation, particularly when traversing soft terrains in low-light conditions.
Ruqayya Alhammadi   +5 more
doaj   +1 more source

Biohybrid Crawling Robot With Spiral‐Spring Backbone and Inclined Legs for Enhanced Locomotion

open access: yesAdvanced Materials, EarlyView.
We present a biohybrid crawling robot integrating a muscle ring with a flexible skeleton combining two complementary structural elements. The spiral‐spring backbone enables large‐amplitude bending without compromising axial stability, while outward‐inclined legs with unequal front–rear lengths effectively convert deformation into directional strides ...
Tomohiro Morita   +2 more
wiley   +1 more source

Dynamic wall models for the slip boundary condition.

open access: yesAnnual research briefs. Center for Turbulence Research (U.S.), 2017
© 2017 Stanford University. This work was supported by NASA under the Transformative Aeronautics Concepts Program, Grant #NNX15AU93A.
Lozano-Durán, A.   +3 more
openaire   +2 more sources

A Critical Call for Mechanistic Investigations of Metal‐Bacteria Interactions

open access: yesAdvanced Materials, EarlyView.
It is well established that the antibacterial properties of metals have tremendous importance for bioengineering applications. What is not as appreciated, however, is the reproducibility crisis in this field's vast literature. In this perspective, we highlight this reproducibility problem, discuss its sources, and suggest solutions towards focused ...
J. Rackwitz   +9 more
wiley   +1 more source

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