Results 51 to 60 of about 127,244 (292)

DC Microgrid Technology: System Architectures, AC Grid Interfaces, Grounding Schemes, Power Quality, Communication Networks, Applications, and Standardizations Aspects

IEEE Access, 2017
To meet the fast-growing energy demand and, at the same time, tackle environmental concerns resulting from conventional energy sources, renewable energy sources are getting integrated in power networks to ensure reliable and affordable energy for the ...
Dinesh Kumar, Firuz Zare, Arindam Ghosh
doaj   +1 more source

The possibilities of implementing pragmatic instruction with Mental Grounding Techniques in EFL college students’ context

Studies in English Language and Education, 2023
The use of psychological techniques to deal with language problems is a well-known strategy in the process of teaching foreign languages as learners can sometimes suffer from anxiety and stress, so it is essential to help students overcome the ...
Liqaa Habeb Al-Obaydi, Marcel Pikhart, Ehsan Namaziandost   +2 more
doaj   +1 more source

Structural and biochemical analysis of a B12 superbinder

FEBS Letters, EarlyView.
BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices, Jacob J. Whittaker, Dirk J. Slotboom, Albert Guskov   +3 more
wiley   +1 more source

Differences in M‐components between triggered lightning striking the ground and overhead line

High Voltage
In the summer of 2018–2019, rocket‐triggered lightning experiments were conducted in Guangzhou, China. There were two types of lightning targets: ground and overhead line.
Li Cai, Yiyang Du, Wenchao Fan, Mi Zhou, Jianguo Wang, Jinxin Cao, Yadong Fan   +6 more
doaj   +1 more source

Prediction of Breakdown Voltage of Long Air Gaps Under Switching Impulse Voltage Based on the ISSA-XGBoost Model

Energies
In transmission lines, the discharge characteristics of long air gaps significantly influence the design of external insulation. Existing machine learning models for predicting breakdown voltage are typically limited to single gaps and do not account for
Zisheng Zeng, Bin Song, Shaocheng Wu, Yongwen Li, Deyu Nie, Linong Wang   +5 more
doaj   +1 more source

From junk to function — How weak selection in eukaryotes builds new parts and drives genomic complexity

FEBS Letters, EarlyView.
How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley   +1 more source

Grounding

, 2012
BACKGROUND Through its high definition presentation of minute, hyper-particularised spaces, the video installation Grounding challenges both the idea that more information is more understanding, as well as the traditional 'realist' and 'naturalist ...
Dominic Redfern (18025147)
core   +1 more source

Chiral separation of chloroalkanes with the chromatographic column onboard Martian rovers

FEBS Letters, EarlyView.
Computer image of the Rosalind Franklin Rover of ESA's ExoMars mission. ExoMars is scheduled to land on planet Mars in Oxia Planum in 2029. This area represents an interesting spot to look for biosignatures. Investigations of ExoMars include measurement on molecular chirality. We show that chiral chloroalkanes, that have been identified on Mars, can be
Asma Merzougui, Agnes Banreti, Armelle L. Ernst, Guillaume Leseigneur, Uwe J. Meierhenrich   +4 more
wiley   +1 more source

Relationship between radar reflectivity thresholds and very low frequency/low frequency total lightning for thunderstorm identification

High Voltage
To improve our knowledge of the spatio‐temporal correspondence between radar reflectivity and VLF/LF total lightning data, this paper proposes indexes to quantify the horizontal distribution and temporal evolution characteristics between radar composite ...
Yijun Huang, Jianguo Wang, Li Cai, Yadong Fan, Hongbin Wang, Tao Zhang   +5 more
doaj   +1 more source

Terrain Effects on Time-Frequency Characteristics of Negative Return Stroke Electric Fields: A Path-Incremental Method

Remote Sensing
Waveforms recorded by lightning location networks mix source variability with propagation effects, making terrain-associated distortion difficult to isolate.
Yiting Chen, Shanqiang Gu, Wenchao Fan, Yingpu Xie, Jinxin Cao, Chun Zhao, Tao Li, Li Cai   +7 more
doaj   +1 more source