Results 71 to 80 of about 22,539 (211)
Autonomous navigation system [PDF]
, 1981 An inertial navigation system utilizing a servo-controlled two degree of freedom pendulum to obtain specific force components in the locally level coordinate system is described.
Merhav, S. J.
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Pan‐Arctic Peatlands Have Expanded During Recent Warming
Global Change Biology, Volume 32, Issue 2, February 2026.Arctic peatland carbon is important because it represents a large carbon stock that may be vulnerable to climate change. This work explores the expansion and/or shrinkage of Arctic peatlands using observations in two north–south transects in Canada and in Europe.
J. Handley +21 more
wiley +1 more source
Theoretical three-and four-axis gimbal robot wrists [PDF]
In high-performance flight simulations, a four-axis gimbal system allows all possible rotations with acceptable gimbal angle rates while it avoids the so-callled 'gimbal lock' that occurs when gimbal rotational axes are colinear. In this paper, pertinent
Barker, L. K., Houck, J. A.
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Journal of Advanced Nursing, Volume 82, Issue 2, Page 1791-1802, February 2026.ABSTRACT Aims To verify the efficacy of virtual reality compared to tablet games for pain and anxiety management in children undergoing percutaneous bone pin and/or suture removal procedures. Design Randomised clinical trial using two parallel groups: (1) virtual reality or (2) tablet game.
Estelle Guingo +19 more
wiley +1 more source
Posture keeing property of the bicycle with twin gimbal mechanism using gyroscopic moment effect
Nihon Kikai Gakkai ronbunshu, 2017 Gyro actuator is often used for the posture control of systems which cannot be supported on a fixed ground. The gyroscopic moment makes preccesion movement of the gimbal mechanism and its effect depends on the rotating speed of the wheel.
Kazuya OGATA +2 more
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Gimbal torque and coupling torque of six degrees of freedom magnetically suspended yaw gimbal
International Journal of Mechanical Sciences, 2020 Abstract When the three-axis intertially stabilized platform (ISP) realizes the fast response of yaw gimbal, coupling torques among three gimbals cause negative influence on the attitude stabilization precision of yaw gimbal which supports the imaging payloads. Therefore, the gimbal torque of six degrees of freedom (DOFs) yaw gimbal with the magnetic
Tong, W, Xiang, B, Wong, W
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Comparison of drone and ground surveys for the detection of a rare plant in a fragile ecosystem
Ecological Solutions and Evidence, Volume 7, Issue 1, January–March 2026.We compared the accuracy, time, and financial costs of drone and ground surveys for the detection of wood lilies (Lilium philadelphicum) in an endangered alvar ecosystem. We found that the drone surveys detected 73%–78% of the plants found in the ground surveys, but that this type of survey was more expensive and time consuming than the ground survey ...
Ana Hernández Martínez de la Riva +3 more
wiley +1 more source
Advanced Science, Volume 13, Issue 1, 5 January 2026.A biomimetic eyeball system (BES) based on a 3‐DOF miniature origami mechanism, which addresses the inherent issues of large size and weight in traditional electromechanical BESs is presented. Moreover, it maintains a level of visual functionality comparable to that of the human eye, including capabilities such as rapid scanning, target recognition ...
Junji Pu +6 more
wiley +1 more source
Archaeological Prospection, Volume 33, Issue 1, Page 257-273, January/March 2026.ABSTRACT Megalithic landscapes in Southeast Iberia remain unevenly and insufficiently documented, particularly in rugged areas where traditional survey methods are limited. This paper addresses this gap by applying a multiscalar approach to the megalithic necropolises of the Fardes River (Granada, Spain), with the objective of detecting, documenting ...
Carolina Cabrero González +3 more
wiley +1 more source
Test results from a dynamic model dynaflex rotor [PDF]
, 1985 A one-fifth scale dynamic model of the Sikorsky Dynaflex rotor was tested in hover and in forward flight conditions in a wind tunnel. The Dynaflex rotor features an advanced composite structure which flexes to provide a constant speed universal joint ...
Goodman, R. K., Niebanck, C. F.
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