Results 101 to 110 of about 512,245 (360)
Meteor Streams and Parent Bodies [PDF]
arXiv, 1999 Problem of meteor orbit determination for a given parent body is discussed. Some of the published methods for obtaining meteoroid's orbital elements at the moment of intersecting Earth's orbit on the basis of geometrical variation of parent body's orbital elements are discussed.
arxiv
Molecular Oncology, EarlyView.Urine is a rich source of biomarkers for cancer detection. Tumor‐derived material is released into the bloodstream and transported to the urine. Urine can easily be collected from individuals, allowing non‐invasive cancer detection. This review discusses the rationale behind urine‐based cancer detection and its potential for cancer diagnostics ...
Birgit M. M. Wever +1 more
wiley +1 more source
Cosmic background explorer (COBE) navigation with TDRSS one-way return-link Doppler in the post-helium-venting phase [PDF]
A navigation experiment was performed which establishes Ultra-Stable Oscillator (USO) frequency stabilized one way return link Doppler TDRSS tracking data as a feasible option for mission orbit determination support at the Goddard Space Center Flight ...
Dunham, J. +4 more
core +1 more source
Orbit graphs and face-transitivity of k-orbit polytopes [PDF]
arXiv, 2012 The orbit graph of a k-orbit polytope is a graph on k nodes that shows how the flag orbits are related by flag adjacency. Using orbit graphs, we classify k-orbit polytopes and determine when a k-orbit polytope is i-transitive. We then provide an explicit classification of three-orbit polytopes, and we describe a generating set for their automorphism ...
arxiv
Surfaceome: a new era in the discovery of immune evasion mechanisms of circulating tumor cells
Molecular Oncology, EarlyView.In the era of immunotherapies, many patients either do not respond or eventually develop resistance. We propose to pave the way for proteomic analysis of surface‐expressed proteins called surfaceome, of circulating tumor cells. This approach seeks to identify immune evasion mechanisms and discover potential therapeutic targets. Circulating tumor cells (
Doryan Masmoudi +3 more
wiley +1 more source
Orbit Determination Error Analysis for the KOMPSAT [PDF]
Journal of Astronomy and Space Sciences, 1998 Orbit error analysis was performed for the GPS navigation solutions and ground station tracking data of the KOMPSAT (Korea Multi-Purpose SATellite), which will be launched in 1999 for cartography of Korean peninsula as main mission. A least square method
Jeong-Sook Lee, Byoung-Sun Lee
doaj
Analysis of Orbit Accuracy for Non-cooperative Earth-Orbiting Objects
Open Astronomy, 2019 The atmospheric resistance and solar radiation pressure are the main sources of non-gravitational perturbations in orbit determination and prediction of non-cooperative earth-orbiting objects.
Jianrong Chen, Junfeng Li
doaj +1 more source
On initial orbit determination
The Astronomical Journal, 1984 The classical methods of initial orbit determination are brought together within a larger viewpoint. This new synthesis stresses that all such techniques follow one of three approaches. Either they seek to compute the orbital element set, or its equivalent, by attacking the differential equations of motion (Laplace), the first integrals of the ...
openaire +2 more sources
Ionospheric refraction effects on orbit determination using the orbit determination error analysis system [PDF]
The influence of ionospheric refraction on orbit determination was studied through the use of the Orbit Determination Error Analysis System (ODEAS). The results of a study of the orbital state estimate errors due to the ionospheric refraction corrections,
Dunham, J. B. +4 more
core +1 more source
Local orbit types of the isotropy representations for semisimple pseudo-Riemannian symmetric spaces [PDF]
https://doi.org/10.1016/j.difgeo.2014.12.002, 2013 We list up all the possible local orbit types of hyperbolic or elliptic orbits for the isotropy representations of semisimple pseudo-Riemannian symmetric spaces. It is key to give a recipe to determine the local orbit types of hyperbolic principal orbits by using three kind of restricted root systems and Satake diagrams associated with semisimple ...
arxiv