Results 21 to 30 of about 39,260 (307)

Stemflow dynamics of Fuji apple trunk sap in arid oasis area and its response to environmental factors

浙江大学学报. 农业与生命科学版, 2020
The aim of this study was to clarify the transpiration water consumption law of apple orchards in the arid oasis area and the driving mechanism of environmental factors on fruit trees, determine the water carrying capacity and formulate an appropriate ...
MA Wentao, CHENG Ping, LI Hong, ZHANG Zhigang, WU Shengli, ZHAO Mingyu   +5 more
doaj   +1 more source

Deorbiting Upper-Stages in LEO at EOM using Solar Sails [PDF]

INCAS Bulletin, 2017
This paper analyzes the possibility of deorbiting a launch vehicle upper-stage at end-of-mission from low Earth orbit through the use of a solar sail. Different solar sail sizes are taken into account.
Alexandru IONEL
doaj   +1 more source

THE SOLAR-RADIATION PRESSURE EFFECTS ON THE ORBITAL EVOLUTION OF ASTEROID MOONS

Odessa Astronomical Publications, 2016
In the theory of motion, disturbances are divided into gravitational and non-gravitational ones. In this paper, we discuss the effects of solar-radiation pressure on the orbital evolution of asteroid moons.
V. V. Troianskyi, O. A. Bazyey
doaj   +1 more source

Detecting the relations between meteorological elements and alpha and beta activity concentration at Al-Tuwaitha site, Baghdad

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska, 2021
In this study, 50 samples of air particulates collected from different places in- and outside the Al-Tuwaitha nuclear site, south of Baghdad were used to measure daily gross alpha and beta activity concentrations (AAC and BAC) for the period from 28 ...
Salwa S. Naif, Thoalfaqar Al-Rbayee, Monim H. Al-Jiboori   +2 more
doaj   +1 more source

Author Correction: Growth of sillenite Bi12FeO20 single crystals: structural, thermal, optical, photocatalytic features and first principle calculations

Scientific Reports, 2021
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Durga Sankar Vavilapalli, Ambrose A. Melvin, F. Bellarmine, Ramanjaneyulu Mannam, Srihari Velaga, Himanshu K. Poswal, Ambesh Dixit, M. S. Ramachandra Rao, Shubra Singh   +8 more
doaj   +1 more source

Model Predictive Control-Based Attitude Control of Under-Actuated Spacecraft Using Solar Radiation Pressure

Aerospace, 2022
An attitude control strategy for an under-actuated spacecraft with two reaction wheels is proposed, using the active assistance of solar radiation pressure torque.
Lei Jin, Yingjie Li
doaj   +1 more source

Attitude Dynamics of the Classical Dumbbell Problem with Solar Radiation Pressure [PDF]

Journal of Guidance, Control, and Dynamics, 2015
This work extends the attitude dynamics and stability properties of the classical planar dumbbell problem, namely, two masses connected by a rigid massless tether [1–3], by considering the effect of a solar radiation pressure (SRP) gradient between the tip masses.
Borggräfe, Andrea, Heiligers, Jeannette, McInnes, Colin R., Ceriotti, Matteo   +3 more
openaire   +4 more sources

Orbital dynamics of earth-orbiting 'smart dust' spacecraft under the effects of solar radiation pressure and aerodynamic drag [PDF]

, 2010
This paper investigates how the perturbations due to asymmetric solar radiation pressure, in presence of Earth's shadow, and atmospheric drag can be balanced to obtain long-lived Earth centered orbits for swarms of SpaceChips, without the use of active ...
COLOMBO, CAMILLA, Colin McInnes, Mcinnes, Colin, Camilla Colombo, Colombo, C., McInnes, C.R.   +5 more
core   +1 more source

SOLAR POWERED IRRIGATION SYSTEM FOR TURF AREA [PDF]

Arab Universities Journal of Agricultural Sciences, 2019
Solar water pumping system may be a competitive application for remote and luxurious areas where power costs a lot. One may argue that solar photovoltaic water pumping systems not only comprises an environmentally friendly solution, but also contributes ...
Manar Abdel-Hakeem, A. El Gindy, Y. Arafa, A. Hegazi   +3 more
doaj   +1 more source

An Artificial Neural Network-Based Approach for Real-Time Hybrid Wind–Solar Resource Assessment and Power Estimation

Energies, 2023
The precise prediction of power estimates of wind–solar renewable energy sources becomes challenging due to their intermittent nature and difference in intensity between day and night.
Imran Shafi, Harris Khan, Muhammad Siddique Farooq, Isabel de la Torre Diez, Yini Miró, Juan Castanedo Galán, Imran Ashraf   +6 more
doaj   +1 more source