Results 61 to 70 of about 248 (115)

On-line Assessment of Voltage Stability using Synchrophasor Technology [PDF]

open access: yes, 2017
Series of blackouts encountered in recent years in power system have been occurred because either of voltage or angle instability or both together was not detected within time and progressive voltage or angle instability further degraded the system ...
Singh, S.P., Singh, Satyendra Pratap
core   +2 more sources

Exercise‐induced dynamic hyperinflation in chronic obstructive pulmonary disease

open access: yesExperimental Physiology, Volume 111, Issue 5, Page 2476-2484, 1 May 2026.
Abstract Chronic obstructive pulmonary disease (COPD) is an inflammatory lung disease caused by inhalation of noxious particles, most commonly cigarette smoking. The consequent changes in airways, lung parenchyma and pulmonary vasculature lead to increased resistive, elastic and threshold loads and impaired capacity of the respiratory muscle pump. COPD
Rebecca F. D'Cruz   +2 more
wiley   +1 more source

Mathematical Models for the Single-Channel and Multi-Channel PMU Allocation Problem and Their Solution Algorithms

open access: yesAlgorithms
Phasor measurement units (PMUs) are deployed at power grid nodes around the transmission grid, determining precise power system monitoring conditions. In real life, it is not realistic to place a PMU at every power grid node; thus, the lowest PMU number ...
Nikolaos P. Theodorakatos   +3 more
doaj   +1 more source

Intermediate Resistance and Capacitance States in Ge‐Rich GeSbTe Phase‐Change Memory

open access: yesphysica status solidi (RRL) – Rapid Research Letters, Volume 20, Issue 4, April 2026.
Intermediate states of Ge‐rich GeSbTe phase‐change (PCM) memory cells are investigated by electrical impedance spectroscopy. Resistance and capacitance are extracted using an equivalent RC model, revealing tunable resistance and SET‐state‐dominated capacitance.
Adrien Delpoux   +7 more
wiley   +1 more source

Phasor Measurement Unit Placements for Complete Observability using Linear-Time, Quadratic-Time, and Subquadratic-Time Heuristics [PDF]

open access: yes, 2010
A phasor measurement unit (PMU) is considered to have the potential to improve the efficiency of electric power systems by monitoring, control, and protection. Through measurements of all bus voltages, incoming and outgoing currents, and by subsequent
Saula, Oluwasijibomi
core  

The landscape of dementia research, diagnosis, treatment, and care in Latin America

open access: yesAlzheimer's &Dementia, Volume 22, Issue 3, March 2026.
Abstract Latin America is undergoing rapid population aging alongside a rising burden of dementia. While the region holds substantial potential for dementia risk reduction, challenges remain, such as delayed diagnoses, limited access to specialized care and biomarker testing, persistent stigma, and deep‐rooted structural inequities.
Claudia K. Suemoto   +41 more
wiley   +1 more source

Optimal PMUs Placement Due to Several Stages for Achieving Full System Observability [PDF]

open access: yes, 2017
The new measurement devices such as phasor measurement units (PMUs), is considered to be an essential component in implementing future power network systems.
Ahmed Hossam-Eldin   +2 more
core   +3 more sources

Attitude and Involvement Regarding Sexual and Reproductive Health Among University Students: A Cross‐Sectional Study in Bangladesh

open access: yesHealth Science Reports, Volume 9, Issue 3, March 2026.
ABSTRACT Background and Aims Sexual and reproductive health (SRH) is a crucial aspect of overall health and well‐being, especially among young adults. However, in many low‐ and middle‐income countries, including Bangladesh, SRH issues remain underexplored due to sociocultural taboos, stigma, and inadequate education.
Ishita Akhter   +7 more
wiley   +1 more source

Optimal PMU Placement to Enhance Observability in Transmission Networks Using ILP and Degree of Centrality

open access: yesEnergies
The optimal PMU placement problem is placing the minimum number of PMUs in the network to ensure complete network observability. It is an NP-complete optimization problem.
Muhammad Musadiq Ahmed   +4 more
doaj   +1 more source

Precision Enhancement of Distribution System State Estimation via Tri-Objective Micro Phasor Measurement Unit Deployment

open access: yes, 2023
A tri-objective optimal Micro Phasor Measurement Units ({\mu}-PMUs) Placement method is presented, with a focus on minimizing the following three parameters: i) the total number of {\mu}-PMU channels, (ii) the maximum state estimation uncertainty, and ...
Abdolahi, Arya   +1 more
core  

Home - About - Disclaimer - Privacy