Results 81 to 90 of about 8,152,883 (248)

A Fully Differential Digital CMOS Pulse UWB Generator [PDF]

open access: yes, 2009
A new fully-digital CMOS pulse generator for impulse-radio Ultra-Wide-Band (UWB) systems is presented. First, the shape of the pulse which best fits the FCC regulation in the 3.1-5 GHz sub-band of the entire 3.1-10.6 GHz UWB bandwidth is derived and ...
Graziano, Mariagrazia   +2 more
core   +1 more source

Effect of SiC nanoparticles on the wear and corrosion resistance of Ag-Si composite coatings prepared by electrodeposition technique

open access: yesApplied Surface Science Advances
This study aims to improve the corrosion and wear resistance of Ag-Si-SiC composite coatings by pulse-reverse electrodeposition and the addition of SiC nanoparticles.
F. Bakhtiarifard, N. Nayebpashaee
doaj   +1 more source

Historical Foundation and Practical Guideline for Ferroelectric Switching Kinetic Studies

open access: yesAdvanced Functional Materials, EarlyView.
The P and U pulses in the conventional PUND measurements are not identical because of the interplay between switching current and the measurement circuit components. This circuit effect can lead to a shift in polarization transients and misinterpreted physics in the switching kinetics.
Yi Liang, Pat Kezer, John T. Heron
wiley   +1 more source

Electronic Phase Shifting in Multipulse Rectifier

open access: yesElectrical, Control and Communication Engineering, 2017
This paper presents a novel converter which can reduce the harmonics like the conventional multipulse converters with input three phase transformer. To reduce total harmonic distortion of input current and improve the weight and size of converters, it is
Sokol Yevgen I.   +3 more
doaj   +1 more source

Recurrence and Nonlinear System Dynamic Analysis of the Electrochemical Oscillations Recorded in the System Mild Steel/H3PO4

open access: yesInternational Journal of Electrochemical Science, 2012
After formation of FePO4:2H2O(c) layer on the steel electrode by imposing a positive potential value; either potentiodynamic (anodic scan of a cyclic votammetry experiment) or potentiostatic (first potential pulse of a double potential step technique ...
G.A. Vázquez-Coutiño   +4 more
doaj   +1 more source

Quantifying Subsurface Weak in‐Plane Magnetization of Mixed Phase BiFeO3 by Scanning Nitrogen Vacancy Magnetometry

open access: yesAdvanced Functional Materials, EarlyView.
We use scanning nitrogen vacancy magnetometry to directly image the weak in‐plane magnetic moments in mixed phase BiFeO3 at the nanoscale and quantify the local magnetic moments to be 18.8±2.0 μB/nm2 in the rhombohedral‐like phase and 1.5±0.6 μB/nm2 in the well‐known non‐magnetic tetragonal‐like phase.
Lei Wang   +14 more
wiley   +1 more source

Study on the circuit producing high-speed pulse with high peak current

open access: yes, 2011
To achieve high peak current with narrow pulse width, the circuit model is analyzed based on a fast and high-power metallic oxide semiconductor field effecttransistor (MOSFET) as the high speed switch of the resistor-capacitor (RC) charge and discharge ...
SongZhiyuan   +5 more
core  

Implantable Ionic Memristors Based on Natural Polymer Heterojunctions

open access: yesAdvanced Functional Materials, EarlyView.
We report an implantable natural polymer‐based ionic memristor composed of hyaluronic acid, chitosan, and PDMS. The device achieved 98.94% accuracy in MNIST classification while reducing training time by 36.8% compared with a conventional artificial neural network (ANN).
Dong‐yup Lee   +6 more
wiley   +1 more source

The Kon-tiki venture [cartographic material] /

open access: yes, 1950
Map of the Pacific Ocean showing route of Kon-tiki, Kuro Siwo and North Pacific drift, North and South Equatorial currents, Mexico current, Belt of Counter current, Peru or Humboldt's current, and South Pacific Connecting current.; "Map review no. 107, 3
Bureau of Current Affairs (London, England)
core  

Galvanostatic Pulse and Pulse Reverse Plating of Nickel-Iron Alloys from Electrolytes Containing Organic Compounds on a Rotating Disk Electrode [PDF]

open access: yes, 1993
Linear sweep voltammetry, galvanostatic pulse, and pulse reverse techniques were used to study the plating of nickel-iron alloys in the presence of organic additives.
White, Ralph E   +2 more
core   +1 more source

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