Results 71 to 80 of about 688,518 (313)
Precise Orbit Determination Based on the Unscented Transform for Optical Observations
Journal of Astronomy and Space Sciences, 2019 In this study, the precise orbit determination (POD) software is developed for optical observation. To improve the performance of the estimation algorithm, a nonlinear batch filter, based on the unscented transform (UT) that overcomes the disadvantages ...
Hyewon Hwang, Eunji Lee, Sang-Young Park
doaj +1 more source
New Space Object Cataloguing through Very-Short-Arc Data Mining
Remote Sensing, 2023 The space surveillance network collects significant quantities of space object monitoring data on a daily basis, which varies in duration and contain observation errors.
Lei Liu +4 more
doaj +1 more source
SIGMA 2 (2006), 006, 60 pages, 2006 In the paper, properties of orbit functions are reviewed and further developed. Orbit functions on the Euclidean space $E_n$ are symmetrized exponential functions. The symmetrization is fulfilled by a Weyl group corresponding to a Coxeter-Dynkin diagram. Properties of such functions will be described.
arxiv +1 more source
Characteristics of the Kelch domain containing (KLHDC) subfamily and relationships with diseases
FEBS Letters, EarlyView.The Kelch protein superfamily includes 63 members, with the KLHDC subfamily having 10 proteins. While their functions are not fully understood, recent advances in KLHDC2's structure and role in protein degradation have highlighted its potential for drug development, especially in PROTAC therapies.
Courtney Pilcher +6 more
wiley +1 more source
A characterization of the fuzzy fractals generated by an orbital fuzzy iterated function system [PDF]
arXiv, 2022 Orbital fuzzy iterated function systems are obtained as a combination of the concepts of iterated fuzzy set system and orbital iterated function system. It turns out that, for such a system, the corresponding fuzzy operator is weakly Picard, its fixed points being called fuzzy fractals.
arxiv
FEBS Letters, EarlyView.LHCPs are transported to the thylakoid membrane via the (cp)SRP pathway. This process involves a transit complex of (cp)SRP43, (cp)SRP54 and LHCP, which interacts with (cp)FtsY and Alb3 at the membrane. GTP hydrolysis by (cp)SRP54 and (cp)FtsY triggers complex dissociation.
Victor Zegarra +7 more
wiley +1 more source
Toward Accurate Physics‐Based Specifications of Neutral Density Using GNSS‐Enabled Small Satellites
Space Weather, 2021 Satellite‐atmosphere interactions cause large uncertainties in low‐Earth orbit determination and prediction. Thus, knowledge of and the ability to predict the space environment, most notably thermospheric mass density, are essential for operating ...
Eric K. Sutton +6 more
doaj +1 more source
Conformal-thin-sandwich initial data for a single boosted or spinning black hole puncture [PDF]
Phys.Rev. D69 (2004) 104020, 2003 Sequences of initial-data sets representing binary black holes in quasi-circular orbits have been used to calculate what may be interpreted as the innermost stable circular orbit. These sequences have been computed with two approaches. One method is based on the traditional conformal-transverse-traceless decomposition and locates quasi-circular orbits ...
arxiv +1 more source
Making tau amyloid models in vitro: a crucial and underestimated challenge
FEBS Letters, EarlyView.This review highlights the challenges of producing in vitro amyloid assemblies of the tau protein. We review how accurately the existing protocols mimic tau deposits found in the brain of patients affected with tauopathies. We discuss the important properties that should be considered when forming amyloids and the benchmarks that should be used to ...
Julien Broc, Clara Piersson, Yann Fichou
wiley +1 more source
Orbit Determination Before Detect: Orbital Parameter Matched Filtering for Uncued Detection [PDF]
arXiv, 2020 This paper presents a novel algorithm to incorporate orbital parameters into radar ambiguity function expressions by extending the standard ambiguity function to match Keplerian two-body orbits. A coherent orbital matched-filter will maximise a radar's sensitivity to objects in orbit, as well as provide rapid initial orbit determination from a single ...
arxiv