Results 51 to 60 of about 347,607 (294)
Advanced Science, EarlyView.A fully soft, self‐reconfigurable gripper inspired by rapeseed flowers is monolithically 3D‐printed and electronics‐free, switching between diagonal and parallel finger arrangements. Establishing a self‐reconfigurable grasping paradigm, the gripper enables diverse manipulation tasks, including rotating bulbs, picking fruits, grasping cross‐scale ...
Qiping Xu +8 more
wiley +1 more source
Advanced Science, EarlyView.A bio‐inspired bidirectional‐winding origami platform enables scalable and programmable deployable structures. Double axial folding inspired by earwig hindwings and Flasher‐based hybridization create modular multilayer architectures with diverse attainable winding angles under fixed boundary conditions.
Wenyao Zhang +5 more
wiley +1 more source
Selective Polarity Control of Metal Oxide Semiconductors for Complementary Logic Gates
Advanced Science, EarlyView.A scalable electrochemical doping strategy enables in situ p‐to‐n polarity conversion in tin oxide (SnO) thin films using electrolyte gating. Both the pristine p‐type SnO transistor and the electrochemically converted n‐type SnO2 transistor exhibited noticeable and stable electrical performance.
Dong Hyun Park +6 more
wiley +1 more source
PITTSBURGH\u27S RAIL TRANSIT RENAISSANCE
, 1988 Pittsburgh\u27s rail transit history is reviewed, and comments are made on the modal options available in the town. The pre-light-rail streetcar operation is described, as well as today\u27s rail system, the T system.
Beim, J
core +2 more sources
Nanoparticle‐Mediated Bubble Suppression During Droplet Solidification for Mechanical Reinforcement
Advanced Science, EarlyView.Nanoparticles mediate droplet solidification by raising nucleation temperature, refining dendrites, and slowing freezing‐front advance, thereby suppressing trapped air bubbles in droplet‐based 3D printing. This strategy reduces bubble volume fraction by ∼35% and increases compressive strength by up to 39%, offering a low‐cost route to stronger printed ...
Runmiao Gao +10 more
wiley +1 more source
Rail Corrugation Characteristics of Cologne Egg Fastener Section in Small Radius Curve
Shock and Vibration, 2020 By analyzing the measured data of rail corrugation in a small radius curve track with Cologne fasteners, the typical passing frequencies of corrugation were obtained.
Zhiqiang Wang +3 more
doaj +1 more source
Advanced Science, EarlyView.Origami has inspired numerous soft deployable mechanisms for safe human‐robot interaction, while its intrinsic kinematic instability at arbitrary configurations limited their practical robotic application. This work presents a 3D printed meter‐scale origami robotic actuator capable of load‐bearing deformation through creaseline stiffness modulation.
Sung Yol Yu +5 more
wiley +1 more source
Angewandte Chemie, EarlyView.A highly versatile and general strategy is presented for the scalable production of practical quantities of ω‐substituted α‐olefins using tris(ω‐substituted alkyl)aluminum telogens that are readily available through a “green” synthesis from commodity triisobutylaluminum and ethene as the taxogen. These new α‐olefins can be designed and used as monomers
Lauren G. Logue +4 more
wiley +2 more sources
Incorporating KPIs in the Quantification of Overall Efficiency of Rolling Stock of Railways
Engineering ProceedingsThe overall efficiency of the rolling stock of railways can be calculated by taking into account three parameters: availability, performance, and quality.
Qamar Mahboob +5 more
doaj +1 more source
Economic Development Impacts of High Speed Rail [PDF]
This paper reviews the state of high-speed rail (HSR) planning in the United States c. 2010. The plans generally call for a set of barely inter-connected hub-and-spoke networks. The evidence from US transit systems shows that lines have two major impacts.
David Levinson
core