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Is Electromagnetic Gravity Control Possible?
AIP Conference Proceedings, 2004We study the interplay of Einstein’s Gravitation (GR) and Maxwell’s Electromagnetism, where the distribution of energy‐momentum is not presently known (The Feynman Lectures, Vol 2, Chapter 27, section 4). As Feynman himself stated, one might in principle use Einstein’s equations of GR to find such a distribution.
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Morphogenesis in cucumber seedlings is negatively controlled by gravity
Planta, 2000Seedlings of most cucurbitaceous plants develop a peg (protuberance caused by cell outgrowth) on the transition zone between the hypocotyl and root. The peg is necessary for removing the seed coat after germination. In our spaceflight experiments on the STS-95 space shuttle, Discovery, we found that cucumber (Cucumis sativus L.) seedlings grown under ...
H, Takahashi +10 more
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Arm movement control in gravity
Journal of NeurophysiologyGravity effects in human motor control are often inferred from asymmetries between movements performed with or against gravity, yet such comparisons are confounded by differences in muscle use, sensory input, and task constraints. Using strictly controlled reaching movements performed at multiple body orientations, we found that inward and outward ...
Dinant A. Kistemaker +3 more
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Gravity control network at airports in nigeria
Journal of Geodynamics, 1987Abstract A network of gravity of control bases located at most of the airports and airfields in Nigeria has been established as a means of controlling future gravimetric studies in Nigeriaand of integrating existing gravity surveys into a unified whole for the purpose of producing gravity anomaly maps for the country.
I.B. Osazuwa, D.E. Ajakaiye
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Haptic Joystick Impedance Control with Gravity Compensation
2019Due to the gravity of the joystick during the remote control using the joystick, If you use it for a long time, the driver’s muscles may become tired. In order to achieve the impedance control of the joystick gravity environment, this paper proposed an impedance control method based on gravity compensation in the gravity environment. The control of the
Yong-Jin Ock +3 more
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Control Time for Gravity-Capillary Waves on Water
SIAM Journal on Control and Optimization, 1995Distributed open-loop control of small amplitude linear waves is considered on a fluid in which surface tension and gravity are significant. The control system is formulated as a first-order evolution equation, reducing the null controllability problem to a moment problem involving frequency exponentials.
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Controlling for Heterogeneity in Gravity Models of Trade
2000This paper argues that it is necessary to allow for country-pair heterogeneity when using the gravity model to estimate international trade flows. We propose and estimate a fixed-effects model that eliminates the heterogeneity bias inherent in standard methods.
Howard J. Wall, I-Hui Cheng
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Solvable models of quantum black holes: a review on Jackiw–Teitelboim gravity
Living Reviews in Relativity, 2023Thomas Mertens, Gustavo Turiaci
exaly