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3 results on '"Aminei, A."'

1. The SKA1_Low Telescope: The Station Design and Prototyping

Author

Tom Booler, J. Bast, Giovanni Comoretto, Andrew Faulkner, Jeremy Baker, M. Jonesv, Denis Cutajar, Monica Alderighi, G. Kaligeridou, Richard A. Bennett, E. de Lera Acedo, Randall B. Wayth, Peter Hall, Pietro Bolli, Andrea DeMarco, K. Zarb Adami, A. Aminei, Jens Abraham, D. Kenney, F. Schlageuhaufer, D. Ung, H. Schnetler, Andrew R. Williams, Marcin Sokolowski, Matt Roberts, Giovanni Naldi, Francesco Schillirò, Alessio Magro, P. Benthem, J. G. Bij de Vaate, Stefan J. Wijnholds, M. Gerbers, T. Colgate, Riccardo Chiello, Adrian Sutinjo, Budi Juswardy, A. Mattana, Simone Rusticelli, Brian Crosse, Federico Perini, Rob Halsall, M. Schiaffino, N. Razavi Ghods, David Emrich, Giuseppe Pupillo, Jader Monari, ITA, GBR, AUS, MLT, and NLD

Subjects
Aperture array, Signal processing, 010504 meteorology & atmospheric sciences, Bandwidth (signal processing), Astrophysics::Instrumentation and Methods for Astrophysics, 020206 networking & telecommunications, 02 engineering and technology, Low frequency, 01 natural sciences, law.invention, Telescope, Square kilometre array, law, 0202 electrical engineering, electronic engineering, information engineering, Geology, 0105 earth and related environmental sciences, Remote sensing
Abstract

The Square Kilometre Array (SKA) [1] telescope consists in its first phase of two arrays, a dish array to be constructed in South Africa and a low frequency aperture array to be constructed in Western Australia. The aperture array, SKAI-Low, will consist of 512 stations, each with 256 wide bandwidth log periodic antennas. The frequency range of SKAI-Low is 50 to 350 MHz. The Low Frequency Aperture Array (LFAA) consortium is tasked to design the station, the infrastructure around them and the station signal processing.

Published
2018

2. The potential of glauconitic sandstone as a potassium fertilizer for olive plants

Author

Hamid Reza Sadeghipour, Ahmad Abdolzadeh, Arash Aminei, and Ehsan Karimi

Subjects
Potassium, Potash, Soil Science, chemistry.chemical_element, engineering.material, Hydroponics, Potassium oxide, Olive trees, chemistry.chemical_compound, Horticulture, chemistry, Agronomy, engineering, Potassium deficiency, Fertilizer, Agronomy and Crop Science, Glauconite
Abstract

This study evaluated the potential of glauconitic sandstone as a fertilizer for supplying potassium to plants. The glauconite sandstone (Maraveh, Iran), as analyzed by X-ray fluorescence, was composed of 2.24% potassium oxide plus high contents of silicon, aluminum and ferric oxide. One-year old olive trees, Olea europaea L., were grown in sand or hydroponic culture in a greenhouse under three potassium treatments. Modified Hoagland nutrient solutions based on potassium treatments including 0.5 mM K+, 5 mM K+ and 400 g glauconitic sandstone powders (per 10 L in hydroponics and per 2.5 L in sand instead of K+ supply) were used in both cultures. Plants grown under the three different potassium treatments did not show any potassium deficiency symptoms. In the sand culture, growth and potassium content were higher in plants fed with 5 mM potassium than with the other two potassium treatments. Growth retardation and decreased potassium content in plants fed with 0.5 mM potassium were more severe in the hydropo...

Published
2012

3. The Low Frequency Receivers for SKA1-Low: Design and Verification

Author

Hermine Schnetler, Jan Geralt bij de Vaate, Andrea DeMarco, David Kerniey, Richard A. Bennett, Matthew J. Roberts, Budi Juswardy, Adrian Sutinjo, M. Jones, Jeanette Bast, Frederico Perini, Peter J. Hall, A. Mattana, Andrew Williams, Eloy de Lera Acedo, D. Ung, P. Benthem, Marchei Gerbers, Giovanni Naldi, Brian Crosse, Pietro Bolli, Denis Cutajar, Andrew Faulkner, Amin Aminei, Nima Razavi Ghods, Kristian Zarb Adami, F. Schlagenhaufer, Gianni Comoretto, Tim Colgate, Jens Abraham, Monica Alderighi, Georgina Kaligeridou, Simone Rusticelli, Rob Halsall, Randall B. Wayth, Marcin Sokolowski, Stefan Wynholds, Alessio Magro, Tom Booler, David Emrich, Giuseppe Pupillo, Jader Monari, Jeremy Baker, Riccardo Chiello, Francesco Schillirò, Marco Schiaffmo, ITA, GBR, AUS, MLT, and NLD

Subjects
Physics, Aperture array, business.industry, Verification system, 020206 networking & telecommunications, 02 engineering and technology, Low frequency, 01 natural sciences, Optics, Square kilometre array, Initial phase, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Range (statistics), business, Telecommunications, 010303 astronomy & astrophysics
Abstract

The initial phase of the Square Kilometre Array (SKA) [1] is represented by a −10% instrument and construction should start in 2018. SKA 1-Low, a sparse Aperture Array (AA) covering the frequency range 50 to 350 MHz, will be part of this. This instrument will consist of 512 stations, each hosting 256 antennas creating a total of 131,072 antennas. A first verification system towards SKA 1-Low, Aperture Array Verification System 1 (AAVSl), is being deployed and validated in 2017.

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