Results 41 to 50 of about 4,635,180 (302)

Losses in coplanar waveguide resonators at millikelvin temperatures

open access: yes, 2009
We study the loss rate for a set of lambda/2 coplanar waveguide resonators at millikelvin temperatures (20 mK - 900mK) and different applied powers (3E-19 W - 1E-12 W). The loss rate becomes power independent below a critical power.
Il'ichev, E.   +6 more
core   +1 more source

A Generalized Switched-Capacitor Multilevel Inverter Topology with Voltage Boosting Ability and Reduced Inrush Current

open access: yesEnergies, 2022
This article presents a novel quadruple boost inverter (QBI) with an integrated boost stage that comprises an inductor, a capacitor, a switch, and an input source.
Vishal Anand   +3 more
doaj   +1 more source

cSi Photovoltaic Modules, Main Degradation Factors Case Study: La Puna (Argentina) [PDF]

open access: yes, 2016
This paper presents an analysis of the power loss of a set of photovoltaic modules exposed for more than fifteen years to solar radiation and other environmental factors. The study covered modules installed in 1989 and concluded with modules installed in
Cadena, Carlos Alberto   +2 more
core   +1 more source

Dietary Protein Intake and Peritoneal Protein Losses in Peritoneal Dialysis Patients

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Peritoneal dialysis (PD) patients lose protein in their waste dialysate, potentially increasing their risk for malnutrition. We wished to determine whether there was any association between losses and dietary protein intake (DPI). Methods DPI was assessed from 24‐h dietary recall using Nutrics software.
Haalah Shaaker, Andrew Davenport
wiley   +1 more source

Adaptive Algorithm for Solving the Load Flow Problem in Distribution System

open access: yesJournal of Intelligent Systems, 2018
This paper presents a fast and efficient method for load flow analysis of radial distribution networks. Here, an adaptive algorithm is proposed to analyze the load flow problem of distribution systems. An adaptive algorithm is the combination of backward/
Kumar Vipin   +2 more
doaj   +1 more source

Generator configuration for helicopter quadruplex electric tail rotor

open access: yesThe Journal of Engineering, 2019
With the move to more electric aircraft (MEA), a key area of investigation is the development of commercially viable systems which are reliable, efficient, low mass, and are compatible and commensurate with the power and multiplex requirements of current
Julian D. Booker   +3 more
doaj   +1 more source

Reliability Enhancement of Photovoltaic Systems under Partial Shading through a Two-Step Module Placement Approach

open access: yesEnergies, 2022
Partial shading has a negative impact on photovoltaic systems by forcing the connected modules to generate lower power, creating severe unexpected power losses.
Belqasem Aljafari   +4 more
doaj   +1 more source

Prediction of windage power loss in alternators [PDF]

open access: yes, 1971
Simplified equations and constants, based on laminar and turbulent flow theory between parallel plates, estimate windage loss in rotating electrical machinery.
Vrancik, J. E.
core   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

open access: yesFEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Charging Station and Power Network Planning for Integrated Electric Vehicles (EVs)

open access: yesEnergies, 2019
The optimal location and size of charging stations are important considerations in relation to the large-scale application of electric vehicles (EVs).
Guozhong Liu   +4 more
doaj   +1 more source

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