Zobrazeno 1 - 10
of 536
pro vyhledávání: '"Mekhaldi, A."'
Publikováno v:
ENP Engineering Science Journal, Vol 4, Iss 1, Pp 15-22 (2024)
The objective of this paper is to investigate the behavior of electric charges on cap-pin glass insulator under 50 Hz AC voltage. The study is conducted using COMSOL Multiphysics to understand the charge location, polarity, and parameters affecting t
Externí odkaz:
https://doaj.org/article/b711f2fa57a547ffb3f5934b3f262652
Publikováno v:
Revue des Énergies Renouvelables, Pp 143 – 154-143 – 154 (2024)
This paper presents a novel approach to the simulation of the most common type of Cloud to Ground lightning strikes applied to a Photovoltaic farm with the view to validating its lightning protection system generally based on the electro geometric mo
Externí odkaz:
https://doaj.org/article/6e6e027c0a254e7a9ed070da5dc42a07
Autor:
C. I. Paleari, F. Mekhaldi, T. Erhardt, M. Zheng, M. Christl, F. Adolphi, M. Hörhold, R. Muscheler
Publikováno v:
Climate of the Past, Vol 19, Pp 2409-2422 (2023)
10Be is produced by the interaction between galactic cosmic rays (GCRs) and solar energetic particles (SEPs) with the Earth's atmospheric constituents. The flux of GCRs is modulated by the varying strength of the magnetic fields of the Earth and the
Externí odkaz:
https://doaj.org/article/c2e761c4f632405cabfe55636c60535f
Autor:
T. Erhardt, C. M. Jensen, F. Adolphi, H. A. Kjær, R. Dallmayr, B. Twarloh, M. Behrens, M. Hirabayashi, K. Fukuda, J. Ogata, F. Burgay, F. Scoto, I. Crotti, A. Spagnesi, N. Maffezzoli, D. Segato, C. Paleari, F. Mekhaldi, R. Muscheler, S. Darfeuil, H. Fischer
Publikováno v:
Earth System Science Data, Vol 15, Pp 5079-5091 (2023)
Here we present the high-resolution continuous flow analysis (CFA) data from the top 479 m of the East Greenland Ice coring Project (EGRIP) ice core covering the past 3.8 kyr. The data consist of 1 mm depth-resolution profiles of calcium, sodium, amm
Externí odkaz:
https://doaj.org/article/5d2483bcdccd44da9eb47c028b247aa8
Autor:
Minjie Zheng, Florian Adolphi, Sylvaine Ferrachat, Florian Mekhaldi, Zhengyao Lu, Andreas Nilsson, Ulrike Lohmann
Publikováno v:
Geophysical Research Letters, Vol 51, Iss 2, Pp n/a-n/a (2024)
Abstract A prerequisite to applying 10Be in natural archives for solar and geomagnetic reconstructions is to know how 10Be deposition reflects atmospheric production changes. However, this relationship remains debated. To address this, we use two sta
Externí odkaz:
https://doaj.org/article/aa99707ce6da4fcfa01f78d6e7cb2d6b
Autor:
Hayakawa, Hisashi, Ribeiro, Paulo, Vaquero, José M., Gallego, María Cruz, Knipp, Delores J., Mekhaldi, Florian, Bhaskar, Ankush, Oliveira, Denny M., Notsu, Yuta, Carrasco, Víctor M. S., Caccavari, Ana, Veenadhari, Bhaskara, Mukherjee, Shyamoli, Ebihara, Yusuke
Publikováno v:
The Astrophysical Journal Letters, 2020
While the Sun is generally more eruptive during its maximum and declining phases, observational evidence shows certain cases of powerful solar eruptions during the quiet phase of the solar activity. Occurring in the weak Solar Cycle 14 just after its
Externí odkaz:
http://arxiv.org/abs/2001.04575
Publikováno v:
ENP Engineering Science Journal, Vol 2, Iss 1, Pp 63-69 (2022)
The carried out investigations aim at clarifying the correlations between physico-chemical properties and the variation of dielectric losses of Cross-Linked Polyethylene (XLPE) as Medium Voltage cable insulation during thermal aging. The used cables
Externí odkaz:
https://doaj.org/article/d1e6a4162ae042fbbe248c491eaab692
Publikováno v:
ENP Engineering Science Journal, Vol 2, Iss 1, Pp 1-5 (2022)
Power transformers are the basic elements of the power grid, which is directly related to the reliability of the electrical system. Many techniques were used to prevent power transformer failures, but the Dissolved Gas Analysis (DGA) remains the most
Externí odkaz:
https://doaj.org/article/0c84041c4e3f482e9d8994da6c3bb80c
Autor:
Nicolas Brehm, Marcus Christl, Timothy D. J. Knowles, Emmanuelle Casanova, Richard P. Evershed, Florian Adolphi, Raimund Muscheler, Hans-Arno Synal, Florian Mekhaldi, Chiara I. Paleari, Hanns-Hubert Leuschner, Alex Bayliss, Kurt Nicolussi, Thomas Pichler, Christian Schlüchter, Charlotte L. Pearson, Matthew W. Salzer, Patrick Fonti, Daniel Nievergelt, Rashit Hantemirov, David M. Brown, Ilya Usoskin, Lukas Wacker
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-8 (2022)
Two extreme solar energetic particle events have been found by carbon isotopes measured in ancient tree rings in 7176 and 5259 BCE. The recorded ~2% increases of atmospheric 14 C for both events exceeds in amplitude of all previously observed events.
Externí odkaz:
https://doaj.org/article/15c7584107454fb6b056596eb09f847b
Autor:
Chiara I. Paleari, Florian Mekhaldi, Florian Adolphi, Marcus Christl, Christof Vockenhuber, Philip Gautschi, Jürg Beer, Nicolas Brehm, Tobias Erhardt, Hans-Arno Synal, Lukas Wacker, Frank Wilhelms, Raimund Muscheler
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-9 (2022)
Cosmogenic radionuclides from ice cores and tree rings indicate that an extreme solar proton event has hit Earth about 9200 years ago. Contrary to expectations, the event occurred during a quiet phase of the Sun within the 11 year solar cycle.
Externí odkaz:
https://doaj.org/article/c42e7a79de114a288a8bdb63739a39ba