Results 101 to 110 of about 849,914 (302)

Apparatus and method for determining the position of a radiant energy source [PDF]

open access: yes, 1981
The position of a terrestrial RF source is determined from a geostationary, synchronous satellite by scanning the beam of a narrow beam width antenna in first and second orthogonal directions over a region including the source.
Schaefer, G. J.
core   +1 more source

Adaptive Hydrogels With Spatiotemporal Stiffening Using pH‐Modulating Enzymes

open access: yesAdvanced Functional Materials, EarlyView.
The chemomechanical coupling in an adaptive hydrogel is studied to further the development of adaptive hydrogels. This coupling is achieved by embedding a pH‐modulating enzyme in a pH‐responsive hydrogel. The enzymatic reaction can be triggered locally, which generates a pH‐decreasing wave throughout the system, increasing the crosslinking density and ...
Natascha Gray   +3 more
wiley   +1 more source

The Effect of Electromagnetic Pulse Attacks on USB Camera Performance

open access: yesJournal of Sensor and Actuator Networks
The camera is a core device for modern surveillance and data collection, widely used in various fields including security, transportation, and healthcare. However, their widespread deployment has proportionally escalated associated security risks.
Gang Wei   +6 more
doaj   +1 more source

Meniscus Pixel Printing for Contact‐Lens Vision Sensing and Robotic Control

open access: yesAdvanced Functional Materials, EarlyView.
A visual‐sensing contact lens is enabled by meniscus pixel printing (MPP), which rapidly patterns a 200 µm perovskite photodetector pixel in 1 s without masks, vacuum processing, or bulky equipment. A deep‐learning‐based super‐resolution reconstructs sparse on‐lens signals into 80 × 80 high‐resolution visual information, while AI‐driven eye‐tracking ...
Byung‐Hoon Gong   +7 more
wiley   +1 more source

Lamplighters, Metabelian Groups, and Horocyclic Products of Trees [PDF]

open access: yes, 2014
Bartholdi, Neuhauser and Woess proved that a family of metabelian groups including lamplighters have a striking geometric manifestation as 1-skeleta of horocyclic products of trees.
Amchislavska, Margarita, Riley, Timothy
core  

Shape‐Changing Multiphase Microparticles from Complex Liquid Crystal Emulsions

open access: yesAdvanced Functional Materials, EarlyView.
Liquid crystalline network (LCN) microparticles are prepared from single, double (Janus), and triple emulsions through a simple and scalable bulk‐emulsification strategy. Under heating, the particles exhibit robust, reversible, large‐amplitude deformations that depend both on the morphology and the liquid crystals director field configuration.
Marco Turriani   +3 more
wiley   +1 more source

Metachromatic Butterfly Bile Pigments for Multi‐Level Optical Security Films

open access: yesAdvanced Functional Materials, EarlyView.
Bio‐derived optical security materials are manufactured by embedding butterfly‐based pigments in polymer films. Tunable color and fluorescence responses arise from concentration‐controlled metachromasy, enabling spatially encoded patterns with distinct visible, UV‐active, and spectral signatures.
Limin Wang, Bodo D. Wilts
wiley   +1 more source

RANCANG BANGUN RANGKA PEMBANGKIT LISTRIK PORTABLE DENGAN MENGGUNAKAN PEMBANGKIT LISTRIK TENAGA BAYU DAN PEMBANGKIT LISTRIK TENAGA SURYA

open access: yesOtopro
Electrical energy sources have developed rapidly today in order to minimize the use of fuel oil which is currently decreasing in number and the distribution of electricity from PLN to the community which is not evenly distributed.
Yudi Siswanto   +3 more
doaj   +1 more source

Electronic equipment, systems, and techniques: A compilation [PDF]

open access: yes
Electronic circuits with specialized computer applications and control circuits are presented.

core   +1 more source

A conclusive experiment to throw more light on "light"

open access: yes, 2004
We describe a new realization of Ghose, Home, Agarwal experiment on wave particle duality of light where some limitations of the former experiment, realized by Mizobuchi and Ohtake, are overcome.
Brida, G.   +3 more
core   +2 more sources

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