Results 91 to 100 of about 2,921 (263)

Four-Level Single-Stage Single-Source Boost-Inverter

IEEE Access
This paper presents a novel concept of a DC-AC converter that ensures AC voltage modulation on four levels using a single branch and achieves voltage boosting.
Robert Stala, Szymon Folmer, Zbigniew Waradzyn, Adam Penczek, Stanislaw Pirog, Aleksander Skala, Andrzej Mondzik, Krishna Kumar Gupta, Pallavee Bhatnagar, Sanjay K. Jain   +9 more
doaj   +1 more source

Melatonin Levels in 89 Individuals With Smith Magenis Syndrome

American Journal of Medical Genetics Part A, EarlyView.
ABSTRACT In patients with Smith–Magenis syndrome (SMS), an inverted circadian rhythm of melatonin (MT) contributes to the sleep disturbance. Standard treatment of sleep disturbance with MT often leads to extremely high daytime MT levels, resulting in even more sleep disorders. We therefore retrospectively evaluated the MT data of 89 SMS patients.
Wiebe Braam, Ann C. M. Smith
wiley   +1 more source

In Vitro Activity of Citrus IntegroPectin Against Breast Cancer and Colon Cancer

ChemFoodChem, EarlyView.
Image shows microscopic photographs of MCF‐7 cells in the presence of lemon, red orange, and sweet orange IntegroPectin bioconjugates at 0.5 or 1.0 mg/mL concentration after 24 h next to a photograph of MCF‐7 cells as such (control). ABSTRACT We investigate the ability of IntegroPectin bioconjugates obtained via acoustic cavitation of lemon, red orange,
Claudia D'Anna, Caterina Di Sano, Giovanna Li Petri, Giuseppe Angellotti, Rosaria Ciriminna, Mario Pagliaro   +5 more
wiley   +1 more source

Research on Underwater Constant High-Voltage DC Switching Technology for MCSEM

Sensors
The marine controlled source electromagnetic (MCSEM) transmitter can transmit high currents near the seabed to detect the electrical structure of the seafloor. The use of three-phase alternating current (AC) transmission can lead to three-phase imbalance,
Zhibin Ren, Meng Wang, Xianhu Luo, Chentao Wang, Tailong Chen   +4 more
doaj   +1 more source

A Cyclic {NiII8DyIII4} Cluster Where the DyIII Moments Are Organized by the Transition Metal Spins

Chemistry – A European Journal, EarlyView.
The synthesis, structural characterisation, and magnetic properties of a cyclic Ni8Dy4 coordination cluster are reported. Ab initio CASSCF and DFT calculations help rationalize the shape of the microSQUID hysteresis and the competing magnetic interactions within the compound. ABSTRACT A series of [Ni8Ln4(CO3)4(L)8(NO3)2(H2O)8 (MeOH)4](NO3)2 (Ln = Dy (1)
Imon J. Dutta, Kartik Chandra Mondal, Jonas Braun, Wolfgang Wernsdorfer, Christopher E. Anson, Yanhua Lan, Kuduva R. Vignesh, Annie K. Powell   +7 more
wiley   +1 more source

Energy Landscapes in Chemical Reactions and Transport

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
Kinetics/dynamics of chemical reactivity and transport of chemical species in a solid are both determined by the energy landscape in which they take place. Discussing common grounds but also distinct differences may help in advancing the understanding in both fields.
Karl‐Michael Weitzel
wiley   +1 more source

Harmonic Performance in Hybrid AC-DC Microgrid Connected Bidirectional Converter with LCL Filter

Journal of Electrical Engineering and Computer Sciences
This paper presents the harmonic performance of a grid-connected hybrid AC-DC microgrid. Using solar power as a source in the DC microgrid and the grid in the AC microgrid eliminates the need for energy storage.
Hasti Afianti, Ahmadi Ahmadi, Saidah Saidah, Richa Watiasih, Bambang Purwahyudi   +4 more
doaj   +1 more source

A 40.68‐MHz Active Rectifier Using PLL and PWM Control of DC‐DC Converter for ON/OFF Delay Compensation

International Journal of Circuit Theory and Applications, EarlyView.
A ramp‐based phase‐locked loop (RPLL) active rectifier operating at 40.68 MHz compensates switching delay variations to improve phase alignment. The proposed architecture achieves 90.3% peak power conversion efficiency and 98.0% voltage conversion ratio for high‐frequency wireless power transfer in implantable medical devices.
Woorim Lee, Sungmin Shin, Seongbin Kwon, Geonwoo Baek, Jongyeop Kim, Franklin Bien   +5 more
wiley   +1 more source

A Code‐Invariant QSG–VGA Co‐Design Methodology for Compact CMOS Vector‐Sum Phase Shifters

International Journal of Circuit Theory and Applications, EarlyView.
A circuit‐level co‐design methodology for compact vector‐sum phase shifters is presented, combining a code‐invariant common‐gate variable‐gain amplifier (VGA) with a resistorless quadrature signal generator (QSG). By maintaining an almost constant input resistance, explicit resistors are eliminated from the QSG.
Uxua Esteban Eraso, Carlos Sánchez‐Azqueta, Francisco Aznar, Concepción Aldea, Santiago Celma   +4 more
wiley   +1 more source

The damage and failure mechanism of prestatically loaded rock during medium‐strain rate cyclic impact loading

Deep Underground Science and Engineering, EarlyView.
Based on experimental results and theoretical analysis, an established rock damage accumulation model that comprehensively considers the preapplied static load, impact peak value, impact frequency, and impact times. Abstract To study the rock damage mechanism under high static loading and superimposed medium strain rate cyclic impact loading, a series ...
Wei Wang, Hanpeng Wang, Zicheng Wang, Xinyuan Xie, Yunhao Wu, Jinhou Zhang, Dekang Sun   +6 more
wiley   +1 more source