Results 41 to 50 of about 3,066,070 (344)

IMPACT OF AGRICULTURAL MANAGEMENT ON COMMUNITIES OF ORIBATIDA, GAMASINA AND COLLEMBOLA IN ITALIAN AND FRENCH VINEYARDS

EQA, 2018
Quantitative and qualitative analyses among the soil microarthropods can be used in biomonitoring as tools in multi-disciplinary approach to characterize soil quality.
Sauro Simoni, Elena Gagnarli, Donatella Goggioli, Silvia Guidi, Franca Tarchi, Lorenzo D'Avino, Brice Giffard   +6 more
doaj   +1 more source

Effects of Biochar on the Growth and Development of Tomato Seedlings and on the Response of Tomato Plants to the Infection of Systemic Viral Agents

Frontiers in Microbiology, 2022
Biochar is a rich carbon product obtained by pyrolysis of biomass under a limited supply of oxygen. It is composed mainly of aromatic molecules, but its agronomic value is hard to evaluate and difficult to predict due to its great variable ...
Marta Luigi, Ariana Manglli, Immacolata Dragone, Maria Grazia Antonelli, Mario Contarini, Stefano Speranza, Sabrina Bertin, Antonio Tiberini, Andrea Gentili, Leonardo Varvaro, Laura Tomassoli, Francesco Faggioli   +11 more
doaj   +1 more source

Over Current Protection for PFM Control DC-DC Converter

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2009
An over current protection method suitable for Fixed ON-time PFM (Pulse Frequency Modulation) Control DC-DC converters is proposed. It is based on inductor bottom current limiting, realized by monitoring the synchronous rectifier current and extending the OFF-phase of the main switch until it decreases to a predetermined limit, and can properly limit ...
YAMADA, Kouhei, SUGAHARA, Satoshi, FUJII, Nobuo   +2 more
openaire   +1 more source

Optimizing the roles of unit and non-unit protection methods within DC microgrids

, 2012
The characteristic behavior of physically compact, multiterminal dc networks under electrical fault conditions can produce demanding protection requirements.
Burt, Graeme, Norman, Patrick, Galloway, Stuart, Fletcher, Steven, Crolla, Paul   +4 more
core   +1 more source

Ordinal dose-response modeling approach for the phthalate syndrome

Environment International, 2020
Background: The phthalate syndrome (PS) is a collection of related male reproductive developmental effects, ranging in severity, that have been observed in rats after gestational exposure to developmentally-toxic phthalates. For statistical purposes, the
Todd D. Blessinger, Susan Y. Euling, Lily Wang, Karen A. Hogan, Christine Cai, Gary Klinefelter, Anne-Marie Saillenfait   +6 more
doaj   +1 more source

Determination of protection system requirements for DC UAV electrical power networks for enhanced capability and survivability

, 2011
A growing number of designs of future Unmanned Aerial Vehicle (UAV) applications utilise dc for the primary power distribution method. Such systems typically employ large numbers of power electronic converters as interfaces for novel loads and generators.
Burt, Graeme, S.D.A. Fletcher, Norman, Patrick, Galloway, Stuart, Fletcher, Steven, P.J. Norman, G.M. Burt, S.J. Galloway   +7 more
core   +1 more source

An optimal protection scheme for spatially distributed UHVDC transmission systems

Zhejiang dianli
Spatially distributed UHVDC transmission systems eliminate the need for AC transmission lines converging at a converter station by enabling DC power transmission at remote locations.
HU Yunpeng, TANG Jun, ZHANG Jianfeng, ZHANG Yiyong, ZHANG Jing, WANG Junsheng   +5 more
doaj   +1 more source

DC Microgrid Protection in the Presence of the Photovoltaic and Energy Storage Systems [PDF]

Journal of Operation and Automation in Power Engineering, 2018
In recent years, most of the loads and distributed generations are connected to the AC grid through the power electronic converters. Using the DC grid beside the AC grid can reduce the conversion stages and power losses.
K. Mazlumi, A. Shabani
doaj   +1 more source

Impact of converter interface type on the protection requirements for DC aircraft power systems

, 2012
The utilization of converter interfaces has the potential to significantly alter the protection system design requirements in future aircraft platforms.
Burt, Graeme, Norman, Patrick, Galloway, Stuart, Fletcher, Steven   +3 more
core   +1 more source

Intersystem fault between MMC‐HVDC and AC systems and its impact on DC/AC protection

IET Generation, Transmission & Distribution, 2022
Flexible DC and AC transmission lines can be arranged across vertically or sharing transmission corridor. Under this condition, the possibility of intersystem fault increases significantly, which endangers the safety of both DC and AC systems.
Wenbo Wang, Bin Li, Botong Li, Jiawei He, Bin Yao, Yimin Liu   +5 more
doaj   +1 more source