Results 51 to 60 of about 60,017 (247)

Revisiting the Hansen Problem: A Geometric Algebra Approach

Mathematics
The Hansen problem is a classic and well-known geometric challenge in geodesy and surveying involving the determination of two unknown points relative to two known reference locations using angular measurements.
Jorge Ventura, Fernando Martinez, Isiah Zaplana, Ahmad Hosny Eid, Francisco G. Montoya, James Smith   +5 more
doaj   +1 more source

Local Control of (4,5,7,8-10)-Filtration Snake Robot via CGA

Mendel, 2017
We describe the local control of a (6{8){link snake like robot endowed with omnidirectional wheels on two links (head and tail). All calculations including the position, direct kinematics, di erential kinematics and inverse kinematics are described in ...
Jaroslav Hrdina, Ales Navrat, Petr Vasik, Radomil Matousek   +3 more
doaj   +1 more source

Pre‐Curved Everting Robots With Embedded Steering Intelligence Fabricated by CO2 Laser Welding

Advanced Intelligent Systems, EarlyView.
Design and experimental demonstration of a laser welded growing robot for anatomically guided navigation. The robot follows an aortic arch phantom entering the branchiocephalic branch through steering by design. The figure shows the physical phantom setup, CAD defined weld geometry and full robot eversion.
Brandon Saldarriaga, Panagiotis Kalozoumis, Panagiotis Vartholomeos, Carlo Seneci, Kawal Rhode, Christos Bergeles   +5 more
wiley   +1 more source

Object Detection in Point Clouds Using Conformal Geometric Algebra [PDF]

, 2017
This paper presents an approach for detecting primitive geometric objects in point clouds captured from 3D cameras. Primitive objects are objects that are well defined with parameters and mathematical relations, such as lines, spheres and ellipsoids ...
Aksel Sveier, Kleppe, Adam Leon, Olav Egeland, Sveier, Aksel, Egeland, Olav, Lars Tingelstad, Tingelstad, Lars, Adam Leon Kleppe   +7 more
core   +1 more source

Bioconvective Unsteady Casson Hybrid Nanofluid Flow on a Variable Darcy Regime Between Two Rotating Disks With Variable Heat Source

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT This study carries significant consequences in various engineering applications, such as cooling rotating disk surfaces, improving chemical reactor performance, and designing filtration systems. Considering these main applications in view, the aim of this study is to investigate time‐dependent Casson hybrid nanofluid flow on a permeable ...
Ebrahem A. Algehyne, Abdul Bariq, Mounirah Areshi, Fahad Maqbul Alamrani, Zehba Raizah, Izharul Haq, Anwar Saeed   +6 more
wiley   +1 more source

Geometric Error Modeling of 3-DOF Planar Parallel Manipulators Using Conformal Geometric Algebra

Machines
This paper proposes a geometrically intuitive error modeling method for planar parallel mechanisms (PPMs) based on conformal geometric algebra (CGA). First, the end point of each limb is determined through rotational transformations in geometric algebra.
Huijing Yao, Chenxin Tang, Xinxue Chai
doaj   +1 more source

Long‐Range Interactions in Topological Superconducting Systems: A Mini Review

Advanced Physics Research, EarlyView.
Long‐range interacting quantum systems are surveyed in this review, with an emphasis on the long‐range topological superconductor and its variants. Long‐range interactions decaying in a power‐law manner can lead to exotic phenomena that finds no analogue in short‐range regimes.
Juntong Ren, Haifeng Lü
wiley   +1 more source

Tutorial Geometric Computing in Computer Graphics using Conformal Geometric Algebra [PDF]

, 2008
Early in the development of Computer Graphics it was realized that projective geometry was well suited for the representation of transformations. Now, it seems that another change of paradigm is lying ahead of us based on Geometric Computing using ...
Dietmar Hildenbrand
core  

Compact Manifolds With Unbounded Nilpotent Fundamental Groups and Positive Ricci Curvature

Communications on Pure and Applied Mathematics, EarlyView.
ABSTRACT It follows from the work of Kapovitch and Wilking that a closed manifold with nonnegative Ricci curvature has a uniformly almost nilpotent fundamental group. Leftover questions and conjectures, have asked if in this context the fundamental group is actually uniformly almost abelian. The main goal of this work is to construct examples (Mk9,gk)$(
Elia Bruè, Aaron Naber, Daniele Semola
wiley   +1 more source

Tracking of Brain Tumors using Vision and Neurosonography

Applied Bionics and Biomechanics, 2010
We have developed a method to render brain tumours from endoneurosonography. We propose to track an ultrasound probe in successive endoscopic images without relying on an external optic or magnetic tracking system.
Rubén Machucho Cadena, Sergio de la Cruz Rodríguez, Eduardo Bayro-Corrochano   +2 more
doaj   +1 more source