Results 11 to 20 of about 53,368 (296)

Cell type-dependent induction of DNA damage by 1800 MHz radiofrequency electromagnetic fields does not result in significant cellular dysfunctions. [PDF]

PLoS ONE, 2013
BACKGROUND: Although IARC clarifies radiofrequency electromagnetic fields (RF-EMF) as possible human carcinogen, the debate on its health impact continues due to the inconsistent results.
Shanshan Xu, Guangdi Chen, Chunjing Chen, Chuan Sun, Danying Zhang, Manuel Murbach, Niels Kuster, Qunli Zeng, Zhengping Xu   +8 more
doaj   +1 more source

Single-Species Artificial Grasslands Decrease Soil Multifunctionality in a Temperate Steppe on the Qinghai–Tibet Plateau

Agronomy, 2021
Artificial grasslands have been regarded as an effective method to improve grass production and quality, especially on the Qinghai–Tibet Plateau. Soil ecosystem multifunctionality (EMF) plays an important role in sustainable regional development. However,
Kelu Chen, Huakun Zhou, Bingbing Lu, Yang Wu, Jie Wang, Ziwen Zhao, Yuanze Li, Mei Wang, Yue Zhang, Wenjing Chen, Guobin Liu, Sha Xue   +11 more
doaj   +1 more source

Dual Loop Reactive Shield Application of Wireless Power Transfer System for Leakage Magnetic Field Reduction and Efficiency Enhancement

IEEE Access, 2021
The wireless power transfer (WPT) system generates a high density leakage electromagnetic field (EMF) during its operation. Exposure to leakage EMF has adverse effects on human health. In order to reduce the leakage EMF, a shielding method can be applied
Jedok Kim, Seungyoung Ahn
doaj   +1 more source

Detecting the colonization of ericoid mycorrhizal fungi in Vaccinium uliginosum using in situ polymerase chain reaction and green fluorescent protein

Plant Methods, 2020
Background Ericoid mycorrhizal fungi (EMF) play important roles in mineral cycling and plant nutrient acquisition, and they increase plant survival in nutrient-poor environments.
Hongyi Yang, Xingyu Zhao, Lili Li, Jie Zhang   +3 more
doaj   +1 more source

FPGA-based implementation of the back-EMF symmetric-threshold-tracking sensorless commutation method for brushless DC-machines [PDF]

, 2013
The operation of brushless DC permanent-magnet machines requires information of the rotor position to steer the semiconductor switches of the power-supply module which is commonly referred to as Brushless Commutation. Different sensorless techniques have
Darba, Araz, De Belie, Frederik, Melkebeek, Jan, Salem Mohamed Salem, Aboubakr   +3 more
core   +1 more source

Optimization of measurement methods for a multi-frequency electromagnetic field from mobile phone base station using broadband EMF meter

Medycyna Pracy, 2015
Background: This paper presents the characteristics of the mobile phone base station (BS) as an electromagnetic field (EMF) source. The most common system configurations with their construction are described. The parameters of radiated EMF in the context
Paweł Bieńkowski, Paweł Cała, Bartłomiej Zubrzak   +2 more
doaj   +1 more source

The opportunities of two-phase hybrid stepping motor back EMF sampling [PDF]

, 2011
By counting the step command pulses, stepping motors can be straightforwardly used for open loop positioning. However, open-loop control is often insufficient to guarantee accurate and energy efficient movements.
Carlier, Lennart, Cox, Peter, Debruyne, C, Debruyne, Colin, Derammelaere, S, Derammelaere, Stijn, Stockman, K, Stockman, Kurt, Van den Abeele, Griet, Vandevelde, Lieven, Vervisch, Bram   +10 more
core   +2 more sources

Solid-phase equilibria in the GeBi2Te4-Bi2Te3-Te system and thermodynamic properties of compounds of the GeTe·mBi2Te3 homologous series

Фізика і хімія твердого тіла, 2022
The GeBi2Te4-Bi2Te3-Te system was investigated by XRD and EMF measurements of the reversible concentration cell of the type (-) GeTe (solid) │glycerol +KCl │ Ge-Bi-Тe (solid) (+) in the 300-450K temperature range. It was shown that, in the indicated
T.M. Alakbarova, E.N. Orujlu, D.M. Babanly, S.Z. Imamaliyeva, M.B. Babanly   +4 more
doaj   +1 more source

A high-order Godunov scheme for global 3D MHD accretion disks simulations. I. The linear growth regime of the magneto-rotational instability [PDF]

, 2009
We employ the PLUTO code for computational astrophysics to assess and compare the validity of different numerical algorithms on simulations of the magneto-rotational instability in 3D accretion disks.
A. Mignone, Balsara, Balsara, Blaes, Brandenburg, Brecht, Cargo, Dai, Davis, Dedner, Del Zanna, Devore, Dzyurkevich, Evans, Falle, Fleming, Fromang, Fromang, Fromang, Fromang, Gammie, Gardiner, Gardiner, Groth, H. Klahr, Hawley, Hawley, Hawley, Hawley, Hawley, Hayes, Hirose, Ilgner, Jin, Komissarov, Kurganov, Londrillo, Londrillo, Lyra, M. Flock, Matsumoto, Mignone, Miyoshi, N. Dzyurkevich, Pessah, Powell, Robinet, Ryu, Sano, Sano, Stone, Stone, Turner, Turner, Turner, Tóth, Wardle   +56 more
core   +2 more sources

Sensorless control of permanent magnet synchronous motor based on adaptive back-EMF observer

Advances in Mechanical Engineering, 2023
Aiming at the problem that the change of motor parameters in actual operation will significantly reduce the control accuracy of the motor, this paper proposes a sensorless control method of permanent magnet synchronous motor based on an adaptive back-EMF
Xiangang Cao, Yu Ye, Yong Duan, Yuze Wu, Xin Yang   +4 more
doaj   +1 more source