Results 11 to 20 of about 256,970 (318)
SN Applied Sciences, 2021 The paper through a critical appraisal of the agricultural practices in the Indian Sundarban deltaic region explores the tripartite problems of arsenic biomagnification, salinity of arable lands and ingress of agrochemical pollutants into the freshwater ...
Anirban Nath +4 more
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Scale Factor Estimation for Quadrotor Monocular-Vision Positioning Algorithms
Sensors, 2022 Unmanned aerial vehicle (UAV) autonomous navigation requires access to translational and rotational positions and velocities. Since there is no single sensor to measure all UAV states, it is necessary to fuse information from multiple sensors. This paper
Alejandro Gómez-Casasola +1 more
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The geometry of physical observables [PDF]
Journal of Mathematical Physics, 2020 Jordan algebras were first introduced in an effort to restructure quantum mechanics purely in terms of physical observables. In this paper, we explain why, if one attempts to reformulate the internal structure of the standard model of particle physics geometrically, one arrives naturally at a discrete internal geometry that is coordinatized by a Jordan
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Magnetars: the physics behind observations. A review [PDF]
Reports on Progress in Physics, 2015 Magnetars are the strongest magnets in the present universe and the combination of extreme magnetic field, gravity and density makes them unique laboratories to probe current physical theories (from quantum electrodynamics to general relativity) in the strong field limit.
TUROLLA, ROBERTO, Zane, S, Watts, A. L.
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Sensors, 2021 A linear mechanical oscillator is non-linearly coupled with an electromagnet and its driving circuit through a magnetic field. The resulting non-linear dynamics are investigated using magnetic circuit approximations without major loss of accuracy and in ...
Georgios Tsakyridis, Nikolaos I. Xiros
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Jurnal Kumparan Fisika, 2020 ABSTRAK Penelitian ini bertujuan untuk medeskripsikan peningkatan keterampilan berpikir kreatif dan keterampilan komunikasi setelah diterapkan pendekatan student centered learning pada matakuliah Strategi Pembelajan Fisika. Penelitian ini menggunakan
Rosane Medriati, Eko Risdianto
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Active Disturbance Rejection Control for the Robust Flight of a Passively Tilted Hexarotor
Drones, 2022 This paper presents a robust control strategy for controlling the flight of an unmanned aerial vehicle (UAV) with a passively (fixed) tilted hexarotor. The proposed controller is based on a robust extended-state observer to estimate and reject internal ...
Santos Miguel Orozco Soto +3 more
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Sensitivity of the Action Observation Network to Physical and Observational Learning [PDF]
Cerebral Cortex, 2008 Human motor skills can be acquired by observation without the benefit of immediate physical practice. The current study tested if physical rehearsal and observational learning share common neural substrates within an action observation network (AON) including premotor and inferior parietal regions, that is, areas activated both for execution and ...
Emily S. Cross +6 more
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Education Sciences, 2023 This study deals with the concept of the observer in science education, which is currently significantly diminished at school. In the first part, we review the theoretical perspective of the concept, regarding its historical role in physics knowledge ...
Ben Stein, Hana Stein, Igal Galili
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Importance of an Astrophysical Perspective for Textbook Relativity [PDF]
, 1997 The importance of a teaching a clear definition of the ``observer'' in special relativity is highlighted using a simple astrophysical example from the exciting current research area of ``Gamma-Ray Burst'' astrophysics.
Eric G Blackman +6 more
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