Results 21 to 30 of about 31,723,300 (294)

The association between tobacco and the risk of asthma, rhinoconjunctivitis and eczema in children and adolescents : analyses from Phase Three of the ISAAC programme [PDF]

open access: yes, 2012
We are grateful to the children and parents who participated in ISAAC Phase Three and the coordination and assistance by the school staff is sincerely appreciated.
Beasley, Richard   +5 more
core   +1 more source

Impact of PWM strategies on RMS current of the DC-link Voltage Capacitor of a dual-three phase drive [PDF]

open access: yes, 2014
The major drawback of usual dual three-phase AC machines, when supplied by a Voltage Source Inverter (VSI), is the occurrence of extra harmonic currents which circulate in the stator windings causing additional losses and constraints on the power ...
ROUHANA, Najib   +5 more
core   +1 more source

Global variation in the prevalence and severity of asthma symptoms : phase three of the International Study of Asthma and Allergies in Childhood (ISAAC) [PDF]

open access: yes, 2009
Background: Phase Three of the International Study of Asthma and Allergies in Childhood (ISAAC) measured the global prevalence and severity of asthma symptoms in children.
Foliaki, S.   +7 more
core   +1 more source

Performance Evaluation of a PV-Based Multilevel Inverter with Improved THD and Efficiency [PDF]

open access: yesJournal of Applied Research in Electrical Engineering
This work presents the design, simulation, and performance evaluation of a three-phase multilevel inverter (MLI) system integrated with photovoltaic (PV) technology for grid-connected applications.
Parimalasundar Ezhilvannan   +2 more
doaj   +1 more source

Acetaminophen use and risk of asthma, rhinoconjunctivitis and eczema in adolescents : ISAAC Phase Three [PDF]

open access: yes, 2011
Rationale: There is epidemiological evidence that the use of acetaminophen may increase the risk of developing asthma. Objectives: To investigate the risk of asthma and other allergic disorders associated with the current use of acetaminophen in 13- to ...
Christopher K. W. Lai   +14 more
core   +1 more source

Three-Phase Single-Stage Photovoltaic System With Synchronverter Control: Power System Simulation Studies

open access: yesIEEE Access, 2022
The performance of a grid forming inverter integrating solar PV/Wind farms with the grid is currently a topic of wide interest. Synchronverter control is one of the well-known grid forming converter techniques. Evaluation of synchronverter control in the
Ajinkya J. Sonawane, Amod C. Umarikar
doaj   +1 more source

Partition of Proteins in a Three‐Phase System [PDF]

open access: yesEuropean Journal of Biochemistry, 1974
A system consisting of three liquid phases has been used for partition of proteins. It is composed of water and three high‐molecular compounds: dextran, Ficoll and poly(ethyleneglycol) the latter partly converted into a derivative. All the three phases have a high water content, 71–79%, and dissolve proteins.
A, Hartman   +2 more
openaire   +2 more sources

Modulation Variants in DC Circuits of Power Rectifier Systems with Improved Quality of Energy Conversion—Part I

open access: yesEnergies, 2021
The article presents various concepts of three-phase power rectifiers with improved quality of converted electric power. This effect is obtained by modulating the currents in the DC output circuits of the rectifiers by means of power electronics ...
Tomasz Pajchrowski   +2 more
doaj   +1 more source

Progressive Antithrombin: A Three-Phase System [PDF]

open access: yesBlood, 1966
Abstract 1. Data are presented which demonstrate that progressive antithrombin activity results from the interaction of three factors: antithrombin, an antithrombin inhibitor, and a platelet factor. In plasma, the antithrombin is held inactive by combination with inhibitor so that no free antithrombic activity is present.
H H, Henstell, M, Kligerman
openaire   +2 more sources

Three-Phase to Single-Phase Generation System Based on Doubly-Fed Induction Generator

open access: yesEletrônica de Potência, 2020
This paper presents a three-phase to singlephase six-leg converter for a wind energy conversion system based on Doubly-Fed Induction Generator (DFIG).
Filipe V. Rocha   +4 more
doaj   +1 more source

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