Results 31 to 40 of about 5,629,230 (293)

Contribution of Airplane Engine Emissions on the Local Air Quality around Stuttgart Airport during and after COVID-19 Lockdown Measures

open access: yesAtmosphere, 2022
Air quality investigations at airports have shown that aircrafts cause a significant increase in air pollution at and around the vicinity of the airport, which can cause adverse effects on human health.
Abdul Samad   +3 more
doaj   +1 more source

Pulmonary Dysfunction Is Associated With Sleep Study Abnormalities in Children With Sickle Cell Disease: A Multicenter Study

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Introduction Pulmonary dysfunction and sleep abnormalities are common in children with sickle cell disease (SCD) and are associated with worse clinical outcomes. Whether spirometry abnormalities are associated with polysomnography (PSG) findings remains unclear.
Ammar Saadoon Alishlash   +4 more
wiley   +1 more source

OpenZmeter: An Efficient Low-Cost Energy Smart Meter and Power Quality Analyzer [PDF]

open access: yes, 2018
Power quality and energy consumption measurements support providers and energy users with solutions for acquiring and reporting information about the energy supply for residential, commercial, and industrial sectors.
Alcayde García, Alfredo   +6 more
core   +2 more sources

Experiments on High-Resolution Digitizer Accuracy in Measuring Voltage Ratio and Phase Difference of Distorted Harmonic Waveforms above 2 kHz

open access: yesMetrology
High-resolution multi-channel digitizers are used extensively for precision low voltage measurements in numerous applications and allow the simultaneous measurement of voltage magnitude ratio and phase difference between two different waveforms in power ...
Imanka Dewayalage   +3 more
doaj   +1 more source

Possibility of solar potential utilization in Republic of Serbia: Practical example [PDF]

open access: yesJournal on Processing and Energy in Agriculture, 2012
According to relevant international institution data, the Republic of Serbia has substantial solar energy potentials. By establishing legal and technical regulations, as well as sublegal acts considering enhanced pricing, foundations for investments in ...
Milićević Dragan   +4 more
doaj  

Hamiltonian energy‐balance method for direct analysis of power systems transient stability

open access: yesIET Generation, Transmission & Distribution, 2019
This paper outlines a Hamiltonian energy‐balance function for computing stable and unstable regions of power systems. Once the generator model is defined, a certain number of variables (holonomic constraints) specifies its state properties (prefault ...
Emanuelle Machado   +1 more
doaj   +1 more source

Effect of Relative Humidity and Air Temperature on the Results Obtained from Low-Cost Gas Sensors for Ambient Air Quality Measurements

open access: yesSensors, 2020
Using low-cost gas sensors for air quality monitoring promises cost effective and convenient measurement systems. Nevertheless, the results obtained have a questionable quality due to different factors that can affect sensor performance.
Abdul Samad   +4 more
doaj   +1 more source

Power Quality Improvement Using Interline Unified Power Quality Conditioner

open access: yesCVR Journal of Science and Technology, 2011
Power quality has become an important factor in power systems, for consumer and household appliances with proliferation of various electric/ electronic equipment and computer systems. The main causes of a poor power quality are harmonic currents, poor power factor, supply voltage variations, etc.
openaire   +2 more sources

‘They Need to Hear You Say It’: Healthcare Professionals’ Perspectives on Barriers and Enablers to End‐of‐Life Discussions With Adolescents and Young Adults With Cancer

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT End‐of‐life conversations with adolescents and young adults (AYAs) with cancer rarely occur without the guidance of healthcare professionals. As a part of the ‘Difficult Discussions’ study, focused on palliative care and advance care planning discussions with AYAs with cancer, we investigated the factors that healthcare professionals identify ...
Justine Lee   +9 more
wiley   +1 more source

Empirical EV Load Model for Distribution Network Analysis

open access: yesEnergies
Electric vehicles (EVs) have introduced new operational challenges for distribution network service providers (DNSPs), particularly for voltage regulation due to unpredictable charging behaviour and the intermittent nature of distributed energy resources
Quang Bach Phan   +2 more
doaj   +1 more source

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