Results 31 to 40 of about 1,939,111 (241)

An anthropometric-based method for the assessment of pelvis position in three-dimensional space

open access: yesMethodsX, 2022
Determining the pelvis position remains a challenge for clinical therapists and researchers mainly due to the difficulty in assessing its potential triaxial rotations in the upright standing posture.
D. Mandalidis, PhD   +2 more
doaj   +1 more source

Approximate representations of shaped pulses using the homotopy analysis method [PDF]

open access: yesMagnetic Resonance, 2021
The evolution of nuclear spin magnetization during a radiofrequency pulse in the absence of relaxation or coupling interactions can be described by three Euler angles. The Euler angles, in turn, can be obtained from the solution of a Riccati differential
T. Crawley, A. G. Palmer III
doaj   +1 more source

Mapping the Tilt and Torsion Angles for a 3-SPS-U Parallel Mechanism

open access: yesRobotics, 2023
This article presents the analysis of a parallel mechanism of type 3-SPS-U. The usual singularity approach is carried out with respect to the Euler angles of the universal joint. However, this approach is computationally expensive especially when stacked
Swaminath Venkateswaran, Damien Chablat
doaj   +1 more source

Fluctuating Elastic Rings: Statics and Dynamics [PDF]

open access: yes, 2000
We study the effects of thermal fluctuations on elastic rings. Analytical expressions are derived for correlation functions of Euler angles, mean square distance between points on the ring contour, radius of gyration, and probability distribution of ...
A.A. Podtelezhnikov   +26 more
core   +5 more sources

On a method of nonlinear optimization for the comparison of spatial structure of molecules [PDF]

open access: yesYugoslav Journal of Operations Research, 2020
To compare the geometry of two or more geometric structures consisting of N ordered points, and which can be considered as solids in three-dimensional space, we developed a method based on the minimization of a certain comparison function.
Chernikova Natalia Yu.   +1 more
doaj   +1 more source

Rotacija z enotskim kvaternionom ( = Rotation with unit quaternion) [PDF]

open access: yesGeodetski Vestnik, 2014
A quaternion is a hyper-complex number. A rule for quaternion multiplications allows us to use it as a rotation in three-dimensional space. The aim of this article is to present quaternion rotations to the Slovene professional geodetic public ...
Klemen Kregar   +2 more
doaj   +1 more source

Rotation Representations and Their Conversions

open access: yesIEEE Access, 2023
A rigid body motion, which can be decomposed into rotation and translation, is essential for engineers and scientists who deal with moving systems in a space.
Soohwan Kim, Minkyoung Kim
doaj   +1 more source

Evaluating the Feasibility of Euler Angles for Bed-Based Patient Movement Monitoring

open access: yesSignals, 2023
In the field of modern healthcare, technology plays a crucial role in improving patient care and ensuring their safety. One area where advancements can still be made is in alert systems, which provide timely notifications to hospital staff about critical
Jonathan Mayer   +6 more
doaj   +1 more source

Characterizations of Framed Curves in Four-Dimensional Euclidean Space

open access: yesUniversal Journal of Mathematics and Applications, 2021
Framed curves in Euclidean space are used to investigate singular curves and are important for singularity theory. In this study, framed curves in four-dimensional Euclidean space are introduced and new results are obtained. The relation of framed curves
Bahar Doğan Yazıcı   +2 more
doaj   +1 more source

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