Results 41 to 50 of about 645,702 (308)

Automatic focus control for facsimile cameras [PDF]

, 1974
An electronic circuit for controlling the focus of facsimile cameras is described. The circuit consists of balanced a.c. amplifiers, two square law function generators, and a differential amplifier and power drive.
Burcher, E. E., Katzberg, S. J., Sinclair, A. R.   +2 more
core   +1 more source

Tailored Hierarchical Porous Copper Architectures via Three Dimensional Printing and Pressure‐less Sintering for Next‐Generation Lithium‐Metal Batteries

Advanced Engineering Materials, EarlyView.
A hierarchical porous copper current collector is fabricated via three‐dimensional printing combined with pressureless sintering to stabilize lithium metal anodes. The interconnected architecture lowers local current density, guides uniform Li deposition within pores, and suppresses dendrite growth.
Alok Kumar Mishra, Mukul Shukla
wiley   +1 more source

Single-structure 3-axis Lorentz force magnetometer based on an AlN-on-Si MEMS resonator

Microsystems & Nanoengineering
This work presents a single-structure 3-axis Lorentz force magnetometer (LFM) based on an AlN-on-Si MEMS resonator. The operation of the proposed LFM relies on the flexible manipulation of applied excitation currents in different directions and ...
Cheng Tu, Xu-heng Ou-Yang, Ying-jie Wu, Xiao-sheng Zhang   +3 more
doaj   +1 more source

Computational Study of the Coupling Performances for a Long-Distance Vertical Grating Coupler

Photonics, 2023
We present a high-efficiency silicon grating coupler design based on a left–right mirror-symmetric grating and a metal mirror. The coupler achieves nearly perfect 90-degree vertical coupling.
Zhonghua Yang, Wenbo Luo, Yu Sun
doaj   +1 more source

Pulse generator permits nondestructive testing of component breakdown voltage [PDF]

, 1965
Nondestructive testing of the breakdown voltage of transistors and other electronic components is achieved by a simple relay circuit. The circuit operates by applying low-energy, high-voltage microsecond pulses to the components under ...

core   +1 more source

Copper Nanocrystallization in Anodic Oxide Films of Ti–Cu‐Based Bulk Metallic Glass and Its Effect on the Corrosion Resistance and Cytocompatibility

Advanced Engineering Materials, EarlyView.
Viktoriia Shtefan, Thorgund Nemec, Ute Hempel, Annett Gebert and coworkers demonstrate that anodic treatment of Ti–Cu‐based metallic glass in a nontoxic pyrophosphate electrolyte forms a protective bilayered Ti/Zr‐oxide film enriched with Cu nanocrystals.
Viktoriia Shtefan, Nora Fernández Navas, Thorgund Nemec, Ivan Kaban, Ute Hempel, Andrea Voss, Volker Hoffmann, Darius Pohl, Annett Gebert   +8 more
wiley   +1 more source

Smooth Cu electrodeposition for Cu(In, Ga)Se2 thin-film solar cells: Dendritic clusters elimination by Ag buffer layer

Energy Reports, 2022
Smooth and compact Cu(In, Ga)Se2 (CIGSe) thin film is critical to prepare high-quality solar cells. However, the ”dendritic” morphology of Cu tends to form on Mo leading to a nonuniform Cu distribution during the electrodeposition process, which affects ...
Bing Li, Aimei Zhao, Dongmei Xiang, Zhuo Peng, Yujie Yuan, Yupeng Xing, Liyong Yao, Jinlian Bi, Wei Li   +8 more
doaj   +1 more source

Broadband RF-distribution amplifier [PDF]

, 1972
Radio frequency amplifier to distribute reference frequencies within communications systems and provide automatic gain control with low phase distortion is described.
Lutes, G. F., Jr.
core   +1 more source

An Experimental High‐Throughput Approach for the Screening of Hard Magnet Materials

Advanced Engineering Materials, EarlyView.
An entire workflow for the high‐throughput characterization and analysis of compositionally graded magnetic films is presented. Characterization protocols, data management tools and data analysis approaches are illustrated with test case Sm(Fe, V)12 based films.
William Rigaut, Pierre Le Berre, Hamdi Jaballah, Lukas Fink, Victor Poline, Richard Haettel, Stéphane Grenier, Gilbert Chahine, Ewen Bellec, Guillaume Buatier, Wilfried Hortschitz, Santa Pile, Thomas Schrefl, Nils Blanc, Yuan Hong, Thibaut Devillers, Nora M. Dempsey   +16 more
wiley   +1 more source

Adaptive wireless-powered network based on CNN near-field positioning by a dual-band metasurface

Nature Communications
With the improvement of industry, the connectivity of electronic devices gradually shift from wired to wireless. As a solution for power delivery, the non-contact power transfer holds promising ways to charge for moving terminals, enabling battery-free ...
De Xiao Xia, Jia Qi Han, Ya Jie Mu, Lei Guan, Xin Wang, Xiang Jin Ma, Li Hao Zhu, Tian Guang Lv, Hai Xia Liu, Yan Shi, Long Li, Tie Jun Cui   +11 more
doaj   +1 more source