Results 91 to 100 of about 591,139 (353)

Innovative observing strategy and orbit determination for Low Earth Orbit Space Debris

, 2011
We present the results of a large scale simulation, reproducing the behavior of a data center for the build-up and maintenance of a complete catalog of space debris in the upper part of the low Earth orbits region (LEO).
A. Milani, A. Rossi, Africano, Bowell, Chesley, D. Farnocchia, Escobal, F. Bernardi, Farnocchia, Fujimoto, Gauss, Gronchi, Johnson, Kessler, L. Dimare, Milani, Milani, Milani, Milani, Milani, Milani, Milani, Rossi, Roy, Schildknecht, Tommei, Wiedemann   +26 more
core   +1 more source

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, Jérome Vialaret, Christophe Hirtz, Catherine Alix‐Panabières   +3 more
wiley   +1 more source

Earth Albedo perturbations on Low Earth Orbit Cubesats [PDF]

International Journal of Aeronautical and Space Sciences, 2013
This work investigates the orbital perturbations of the cubesats that lie on LEO due to Earth albedo. The motivation for this paper originated in the investigation of the orbital perturbations for closed- Earth pico-satellites due to the sunlight reflected by the Earth (the albedo). Having assumed that the Sun lies on the equator, the albedo irradiance
T.E. Sharaf-Eldin, N. S. Khalifa
openaire   +1 more source

Combined spatially resolved metabolomics and spatial transcriptomics reveal the mechanism of RACK1‐mediated fatty acid synthesis

Molecular Oncology, EarlyView.
The authors analyzed the spatial distributions of gene and metabolite profiles in cervical cancer through spatial transcriptomic and spatially resolved metabolomic techniques. Pivotal genes and metabolites within these cases were then identified and validated.
Lixiu Xu, Jinqiu Li, Junqi Ma, Ayshamgul Hasim   +3 more
wiley   +1 more source

Addressing persistent challenges in digital image analysis of cancer tissue: resources developed from a hackathon

Molecular Oncology, EarlyView.
Large multidimensional digital images of cancer tissue are becoming prolific, but many challenges exist to automatically extract relevant information from them using computational tools. We describe publicly available resources that have been developed jointly by expert and non‐expert computational biologists working together during a virtual hackathon
Sandhya Prabhakaran, Clarence Yapp, Gregory J. Baker, Johanna Beyer, Young Hwan Chang, Allison L. Creason, Robert Krueger, Jeremy Muhlich, Nathan Heath Patterson, Kevin Sidak, Damir Sudar, Adam J. Taylor, Luke Ternes, Jakob Troidl, Xie Yubin, Artem Sokolov, Darren R. Tyson   +16 more
wiley   +1 more source

КЛАСТЕРНЫЙ АНАЛИЗ БАЗЫ ДАННЫХ ПАРАМЕТРОВ ОРБИТ ИСЗ

Odessa Astronomical Publications, 2011
Cluster analysis of database of orbit parameters of artificial satellites. L.Shakun, N.Koshkin. The relational base of orbital parameters of near-Earth space objects (SO) is created.
Л. С. Шакун, Н. И. Кошкин
doaj   +1 more source

Climate-Quality Calibration for Low Earth-Orbit Microwave Radiometry

Remote Sensing, 2020
Improvements in radiometric calibration are needed to achieve the desired accuracy and stability of satellite-based microwave-radiometer observations intended for the production of climate data records.
Philip W. Rosenkranz, William J. Blackwell, R. Vincent Leslie   +2 more
doaj   +1 more source

Continuous thrust tangential or perpendicular to the flight direction on a given transfer trajectory in planar Circular Restricted 3-Body Problem [PDF]

INCAS Bulletin, 2011
This paper presents a systematic study for analytical determination of thrust acceleration magnitude on a given trajectory for a case where the thrust is tangential or perpendicular to the flight direction.
Mircea DUMITRACHE
doaj   +1 more source

The Earth-Moon CR3BP: A full Atlas of low-energy fast periodic transfer orbits [PDF]

arXiv, 2006
In the framework of the planar CR3BP for mass parameter mu=0.0121505, corresponding to the Earth-Moon system, we identify and describe 80 families of periodic orbits encircling both the Earth and the Moon ("transfer" orbits). All the orbits in these families have very low energies, most of them corresponding to values of the Jacobi constant C for which
arxiv  

Cubesats in Low Earth Orbit: Perils and Countermeasures [PDF]

arXiv, 2021
In orbit, we find a harsh environment able to damage even space-qualified components. The main threats will be listed in the following lines, one by one, also presenting some of the effects on commercial electronics. According to the literature, the most recommended materials and countermeasures will be also introduced under each 'Materials and ...
arxiv