Results 261 to 270 of about 155,574 (308)

Gravity-controlled gliding velocity in Loxodes

European Journal of Protistology, 1992
The locomotion of Loxodes as controlled by the natural gravity vector was investigated employing a mass-cell approach. Samples of cells were incubated for 4 hours in a 1.6 mm deep well (41 × 85 mm) filled with defined experimental solution. Their gliding locomotion on surfaces inclined between 0° and 90° was recorded by videocamera.
R, Bräucker, S, Machemer-Röhnisch, H, Machemer, A, Murakami   +3 more
openaire   +2 more sources

Terraforming of Planets Through Gravity Control - Production of Gravity

SSRN Electronic Journal, 2021
This paper presents the cases of terraforming by gravity control and the case of production gravity. Using the prior work of the “Gravity Control” are determined the cases of terraforming a planet. Moreover, is presented the case of production gravity.
openaire   +1 more source

Gravity Controls for Windows

2012
This paper presents the concept and a prototype of "Gravity Controls". "Gravity Controls" makes standard Graphical User Interface (GUI) controls "magnetic" to allow overcoming impacts of motor problems (e.g. tremor of users leading to unsmooth movements and instable positioning of the cursor (e.g. for clicking or mouse over events).
Peter Heumader, Klaus Miesenberger, Gerhard Nussbaum   +2 more
openaire   +1 more source

Towards the control of matter with gravity

37th Joint Propulsion Conference and Exhibit, 2001
This article summarises some of the current activities of the gravitational research group above. After surveying the role of gauge fields as carriers of the basic forces in physics and the momentum conservation constraints placed on current propulsion technology a number of alternative strategies, under active investigation, are briefly discussed. The
D. Burton, S. Clark, T. Dereli, J. Gratus, W. Johnson, R. Tucker, C. Wang   +6 more
openaire   +1 more source

Modeling and control of a counter-gravity casting machine

2008 American Control Conference, 2008
Counter-gravity casting is a process where molten metal is forced into the casting cavity against gravity. It aims at increasing the energy efficiency of the casting process. It also offers an opportunity of introducing automatic control into the process by changing the pressure under which the metal is forced into the mold cavity. This paper describes
A. M. Khader, Mohamed A. Abdelrahman, Charles C. Carnal, Wael A. Deabes   +3 more
openaire   +1 more source

Morphogenesis in cucumber seedlings is negatively controlled by gravity

Planta, 2000
Seedlings 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, M, Kamada, Y, Yamazaki, N, Fujii, A, Higashitani, S, Aizawa, I, Yoshizaki, S, Kamigaichi, C, Mukai, T, Shimazu, K, Fukui   +10 more
openaire   +2 more sources

Gravity and Suspension Effects on the Dynamics of Controlled Structures

34th Structures, Structural Dynamics and Materials Conference, 1993
The effects of gravity on the actuators, sensors and structural plant of a controlled flexible structure are investigated. These influences include gravity stiffening, gravity induced deformations, gravity influence on inertial sensors and actuators, and the interaction with the suspension system.
GAUDENZI, Paolo, REY D., CRAWLEY E., ALEXANDER H., GLEASE R.   +4 more
openaire   +2 more sources

$γ$ gravity: Steepness control

2013
We investigate a simple generalization of the metric exponential $f(R)$ gravity theory that is cosmologically viable and compatible with solar system tests of gravity. We show that, as compared to other viable $f(R)$ theories, its steep dependence on the Ricci scalar $R$ facilitates agreement with structure constraints, opening the possibility of $f(R)$
O'Dwyer, M., Joras, S. E., Waga, I.
openaire   +1 more source

An automatic method for controlling the centre of gravity of a model

Computer-Aided Design, 2002
In many applications the location of the centre of gravity of a mechanical part is an important factor that a designer must consider. If it is not in a desired location, a part might not work properly, e.g. unbalanced force might be generated in a rotational part.
Tan, ST, Chiu, WK
openaire   +3 more sources

Is Electromagnetic Gravity Control Possible?

AIP Conference Proceedings, 2004
We 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.
openaire   +1 more source