Results 31 to 40 of about 198,483 (281)
Fiber-Preserving Conformal Vector Field of Frame Bundles with Natural Riemannian Metric [PDF]
Memoirs of the Scientific Sections of the Romanian Academy, 2019 We consider the bundle of all oriented orthonormal frames over an orientable Remannian manifold. This bundle has a natural Riemannian metric which is defined by the Riemannian connection of the base manifold.
M.T.K. Abbassi , N. Amri
doaj
Oriented robot motion planning in Riemannian manifolds
, 2019 We consider the problem of robot motion planning in an oriented Riemannian manifold as a topological motion planning problem in its oriented frame bundle.
Mescher, Stephan
core +1 more source
Remote Sensing, 2018 Direct georeferencing of airborne pushbroom scanner data usually suffers from the limited precision of navigation sensors onboard of the aircraft. The bundle adjustment of images and orientation parameters, used to perform geocorrection of frame images ...
Kévin Barbieux
doaj +1 more source
Multiscale Image Matching for Automated Calibration of UAV-Based Frame and Line Camera Systems
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021 Unmanned aerial vehicles (UAVs) equipped with integrated global navigation satellite systems/inertial navigation systems together with frame and/or line cameras are used for a variety of applications. Geometric system calibration is crucial
Seyyed Meghdad Hasheminasab +3 more
doaj +1 more source
Real‐time assay of ribonucleotide reductase activity with a fluorescent RNA aptamer
FEBS Letters, EarlyView.Ribonucleotide reductases (RNR) synthesize DNA building blocks de novo, making them crucial in DNA replication and drug targeting. FLARE introduces the first single‐tube real‐time coupled RNR assay, which enables isothermal tracking of RNR activity at nanomolar enzyme levels and allows the reconstruction of allosteric regulatory patterns and rapid ...
Jacopo De Capitani +4 more
wiley +1 more source
Toward an Automatic Calibration of Dual Fluoroscopy Imaging Systems [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016 High-speed dual fluoroscopy (DF) imaging provides a novel, in-vivo solution to quantify the six-degree-of-freedom skeletal kinematics of humans and animals with sub-millimetre accuracy and high temporal resolution.
K. Al-Durgham +4 more
doaj +1 more source
Foliations of Tangent Bundle in a Finsler Manifold [PDF]
, 2012 In this paper, a frame is introduced on tangent bundle of a Finsler manifold in a manner that it makes some simplicity to study the properties of the natural foliations in tangent bundle. Moreover, we show that the indicatrix bundle of a Finsler manifold
Attarchi, H., Rezaii, M. M.
core
4-Dimensional BF Theory as a Topological Quantum Field Theory
, 1995 Starting from a Lie group G whose Lie algebra is equipped with an invariant nondegenerate symmetric bilinear form, we show that 4-dimensional BF theory with cosmological term gives rise to a TQFT satisfying a generalization of Atiyah's axioms to ...
A. Ashtekar +14 more
core +2 more sources
Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation
FEBS Letters, EarlyView.Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe +3 more
wiley +1 more source
Time after time – circadian clocks through the lens of oscillator theory
FEBS Letters, EarlyView.Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo +2 more
wiley +1 more source