Results 71 to 80 of about 7,732 (256)

Projective Plane Subdivision Method for Initial Orbit Determination

17 pages, 9 ...
Ruiqi Huang, Anton Leykin, Michela Mancini   +2 more
openaire   +2 more sources

Calpain small subunit homodimerization is robust and calcium‐independent

FEBS Letters, EarlyView.
Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy, Trina Dykstra‐MacPherson, Mathias A. Bell, Peter L. Davies, Ruby May A. Sullan   +4 more
wiley   +1 more source

Dynamic Triangulation for Cislunar Initial Orbit Determination

The Journal of the Astronautical Sciences
Abstract Conventional angles-only initial orbit determination algorithms assume Keplerian dynamics and are not always well-adapted to finding the orbits of objects on cislunar trajectories. We propose a solution to this problem based on the concept of dynamic triangulation, which is a type of triangulation algorithm that produces a ...
Liam Smego, John Christian
openaire   +1 more source

DETERMINATION OF INITIAL CONDITIONS FOR SATELLITE FORMATION ELYING IN ELLIPTICAL ORBITS

Journal of Astronomy and Space Sciences, 2005
The initial conditions that generate bounded motion in eccentric reference orbit are determined for satellite formation flying. Because Hill's equations cannot describe the relative motion between two satellites in eccentric orbit, a new relative dynamics utilizing the nonlinearity and eccentricity correction for Hill's initial conditions is ...
Woo-Kyoung Lee, Sung-Moon Yoo, Sang-Young Park, Kyu-Hong Choi, Young-Keun Chang   +4 more
openaire   +3 more sources

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Valosin‐containing protein counteracts ATP‐driven dissolution of FUS condensates through its ATPase activity in vitro

FEBS Letters, EarlyView.
Biomolecular condensates formed by fused in sarcoma (FUS) are dissolved by high ATP concentrations yet persist in cells. Using a reconstituted system, we demonstrate that valosin‐containing protein (VCP), an AAA+ ATPase, counteracts ATP‐driven dissolution of FUS condensates through its D2 ATPase activity.
Hitomi Kimura, Shin‐ichi Tate, Kyota Yasuda   +2 more
wiley   +1 more source

Initial Orbit Determination Solution Distribution with Gooding Algorithm and Performance Enhancement

Space: Science & Technology
An initial orbit determination (IOD) solution from angles-only observations of a single short orbit arc is often required for applications such as tracklet association and fast reacquisition of a newly detected space object.
Zhengyuan Zhang, Bin Li, Zhenwei Li, Xiaohong Zhang, Jizhang Sang   +4 more
doaj   +1 more source

Organizing the interface—Plasma membrane architecture and receptor dynamics in virus‐cell interactions

FEBS Letters, EarlyView.
Plasma membranes contain dynamic nanoscale domains that organize lipids and receptors. Because viruses operate at similar scales, this architecture shapes early infection steps, including attachment, receptor engagement, and entry. Using influenza A virus and HIV‐1 as examples, we highlight how receptor nanoclusters, multivalent glycan interactions ...
Jan Schlegel, Christian Sieben
wiley   +1 more source

Epigenetic blind spots – the role of DNA methylation dynamics in stem cell‐based models of embryogenesis

FEBS Letters, EarlyView.
Embryo‐like structures (stembryos) are an innovative tool, but they are hindered by experimental variability and limited developmental potential. DNA methylation is crucial for mammalian development, but its status in stembryo models is poorly characterized.
Sara Canil, Anna Corrà, Annalisa Scapolatiello, Chengxiang Qiu, Gianluca Amadei   +4 more
wiley   +1 more source

Autonomous Orbit Determination of LLO Satellite Using DRO–LLO Links and Lunar Laser Ranging

Aerospace
A stable and high-precision autonomous orbit determination scheme for a Low Lunar Orbit (LLO) spacecraft is proposed, leveraging satellite-to-satellite tracking (SST) measurement data and lunar laser ranging data.
Shixu Chen, Shuanglin Li, Jinghui Pu, Yingjie Xu, Wenbin Wang   +4 more
doaj   +1 more source