Results 161 to 170 of about 980,794 (310)
A New Approach to Power Efficiency Improvement of Ultrasonic Transmitters via a Dynamic Bias Technique. [PDF]
Sensors (Basel), 2021 Kim K, Choi H.
europepmc +1 more source
Arthritis Care &Research, EarlyView.Objective Cam morphology, which is a significant risk factor for hip osteoarthritis, is commonly quantified by the alpha angle (AA). This study aims to explore the potential of the triangular index ratio (TIR) to quantify cam morphology on anteroposterior radiographs by assessing the association between TIR‐defined cam morphology and the development of
Jinchi Tang +7 more
wiley +1 more source
MASTER AND SLAVE CONTROL FOR PARALLEL OPERATION OF EPTS
Electrica, 2006 Parallel operation is a new question caused by EPT being introduced into power system. In this paper, a Master/Slave control strategy for parallel operation of EPTs is proposed.
Dan WANG +3 more
doaj +2 more sources
The Reactivation of Decayed Positive Leader With Sudden Channel Elongation in Laboratory Long Spark
Geophysical Research LettersPositive lightning leaders present reactivation behaviors during their propagation processes. The mechanism underlying the reactivation of positive leaders is yet unclear.
Dianhang Li +7 more
doaj +1 more source
Arthritis Care &Research, EarlyView.Systemic sclerosis (SSc) is a rare autoimmune disease defined by immune dysregulation, vasculopathy, and progressive fibrosis of the skin and internal organs. Despite advances in care, major complications such as interstitial lung disease (ILD) and myocardial involvement remain the leading causes of morbidity and mortality.
Cristiana Sieiro Santos +2 more
wiley +1 more source
In this paper, the new empirical industrial organization approach with a dynamic model is simultaneously employed to measure the degree of oligopoly, oligopsony power, and cost efficiency in the U.S. beef packing industry.
Chung, Chanjin, Ji, In Bae
core
System modeling of CMOS power amplifier employing envelope and average power tracking for efficiency enhancement [PDF]
, 2013 textIn the past decade, there has been great motivation to improve the efficiency of power amplifiers (PAs) in handset transmitter systems in order to address critical issues such as poor battery life and excessive heat.
Tintikakis, Dimitri
core
Arthritis Care &Research, EarlyView.Objective To investigate the association between rheumatoid arthritis (RA) and coronary artery calcium (CAC) prevalence, incidence, and progression over four years in adults without prior cardiovascular disease. Methods A case‐cohort study within the Brazilian Longitudinal Study of Adult Health (ELSA‐Brasil) included 585 participants (86 patients with ...
Patrícia Fonseca Estrada +7 more
wiley +1 more source
Arthritis Care &Research, Accepted Article.Objective JAK inhibitors (JAKis) have shown promising effects in early‐phase studies of SSc. We aimed to assess the safety and explore effectiveness of JAKis compared to conventional immunosuppressants in SSc. Methods A longitudinal retrospective study of the EUSTAR cohort was performed.
Stefano Di Donato +27 more
wiley +1 more source
Ultra Wideband High-Efficiency High-Power Amplifier Design by Simplified Output Matching Technique
This paper presents the design of a Gallium Nitride (GaN) transistor-based ultra-wideband (UWB) high-efficiency power amplifier (PA) with 25W (44 dBm) output power operating in the 2–6 GHz frequency band. The design of the matching circuits is based on a
Metin Yazgı +2 more
core +1 more source