Results 31 to 40 of about 54,044 (213)

Ultrathin petal-like NiAl layered double oxide/sulfide composites as an advanced electrode for high-performance asymmetric supercapacitors [PDF]

open access: yes, 2017
Layered double hydroxide (LDH) is an important layer-structured material for supercapacitors because of its versatile compositions, high theoretical capacitance, environmental friendliness, and low cost.
Cho, Young-Rae   +3 more
core   +1 more source

Sign Tests for Long-memory Time Series [PDF]

open access: yes, 2005
This paper proposes sign-based tests for simple and composite hypotheses on the long-memory parameter of a time series process. The tests allow for nonstationary hypothesis, such as unit root, as well as for stationary hypotheses, such as weak dependence
Delgado, Miguel A., Velasco, Carlos
core   +2 more sources

High precision hybrid RF and ultrasonic chirp-based ranging for low-power IoT nodes [PDF]

open access: yes, 2020
Hybrid acoustic-RF systems offer excellent ranging accuracy, yet they typically come at a power consumption that is too high to meet the energy constraints of mobile IoT nodes.
Cox, B   +4 more
core   +2 more sources

A scalable hardware and software control apparatus for experiments with hybrid quantum systems [PDF]

open access: yes, 2018
Modern experiments with fundamental quantum systems - like ultracold atoms, trapped ions, single photons - are managed by a control system formed by a number of input/output electronic channels governed by a computer. In hybrid quantum systems, where two
Calosso, Claudio E.   +5 more
core   +2 more sources

Implementation of CMOS Low Dropout Voltage Regulator with Frequency divider for Improved Stability [PDF]

open access: yes, 2017
A Amplifier is a gadget that is use to intensify the flag quality. The outline of superior and stable low drop-out voltage controllers is a test these days with diminishing gadget sizes and expanding power densities.
Khan, A. N. (Abdul)   +2 more
core   +1 more source

Fast LDO Handles a Wide Range of Load Currents and Load Capacitors, up to 100 mA and Over 1μF

open access: yesIEEE Access, 2022
This paper proposes a low dropout voltage regulator (LDO) that exhibits both a fast response to load transients and the ability to handle practically any load capacitor.
Alina-Teodora Grajdeanu   +5 more
doaj   +1 more source

Behavior of large-scale rectangular columns confined with FRP composites [PDF]

open access: yes, 2010
This paper focuses on axially loaded, large-scale rectangular RC columns confined with fiber-reinforced polymer (FRP) wrapping. Experimental tests are conducted to obtain the stress-strain response and ultimate load for three field-size columns having ...
Toutanji, H   +3 more
core   +2 more sources

Paleoceanography of the eastern equatorial Pacific during the Neogene: Synthesis of Leg 138 drilling results [PDF]

open access: yes, 1995
The primary objective of Leg 138 was to provide detailed information about the ocean\u27s response to global climate change during the Neogene. Two north-south transects were drilled (95° and 110°W) within the region of equatorial divergence-driven ...
Mayer, Larry A.   +2 more
core   +2 more sources

Heterogeneous activation of persulfate by CuMgAl layered double oxide for catalytic degradation of sulfameter

open access: yesGreen Energy & Environment, 2022
In this study, a series of CuMgAl layered double oxides (CuMgAl-LDOs) were obtained via calcination of CuMgAl layered double hydroxides (CuMgAl-LDHs) synthesised via a co-precipitation method.
Hongmin Zhang   +3 more
doaj   +1 more source

A Fast-Transient Output Capacitor-Less Low-Dropout Regulator Using Active-Feedback and Current-Reuse Feedforward Compensation

open access: yesEnergies, 2018
In this paper, output capacitor-less low-dropout (LDO) regulator using active-feedback and current-reuse feedforward compensation (AFCFC) is presented. The open-loop transfer function was obtained using small-signal modeling.
Eun-Taek Sung   +2 more
doaj   +1 more source

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