Results 21 to 30 of about 6,059,826 (263)

Uncertainty Quantification for Space Situational Awareness and Traffic Management

Sensors, 2019
This paper presents a sensor-orientated approach to on-orbit position uncertainty generation and quantification for both ground-based and space-based surveillance applications.
Samuel Hilton, Federico Cairola, Alessandro Gardi, Roberto Sabatini, Nichakorn Pongsakornsathien, Neta Ezer   +5 more
doaj   +1 more source

YOLO v4 Based Algorithm for Resident Space Object Detection and Tracking

, 2023
Resident Space Objects (RSOs) detection and tracking are relevant challenges in the framework of Space Situational Awareness (SSA). The growing number of active and inactive platforms and the incoming era of mega constellations is increasing the traffic ...
Curti F., Goracci G., Agostinelli I., Mastrofini M.   +3 more
core   +1 more source

Research on Spatial-temporal Spread and Risk Profile of the COVID-19 Epidemic Based on Mobile Phone Trajectory Data

Frontiers in Big Data, 2022
The COVID-19 epidemic poses a significant challenge to the operation of society and the resumption of work and production. How to quickly track the resident location and activity trajectory of the population, and identify the spread risk of the COVID-19 ...
Qi Zuo, Jiaman Du, Baofeng Di, Junrong Zhou, Lixia Zhang, Hongxia Liu, Xiaoyu Hou   +6 more
doaj   +1 more source

Tsarskoye Selo text in Russian Poetry: Structure and dynamics

Urbis et Orbis: Mikroistoriâ i Semiotika Goroda, 2021
The article examines the Tsarskoye Selo text as one of the local supertexts of Russian literature. Researchers identify a complex of mythologemes, images, and motifs that make it possible to combine the texts of different authors into a supertext based ...
Olga Grinevich
doaj   +1 more source

Monocular Relative Pose Estimation Pipeline for Uncooperative Resident Space Objects

Journal of Aerospace Information Systems, 2022
This paper aims to present a deep learning-based pipeline for estimating the pose of an uncooperative target spacecraft from a single grayscale monocular image. The possibility of enabling autonomous vision-based relative navigation in close proximity to a noncooperative resident space object would be especially appealing for mission scenarios such as ...
Massimo Piazza, Michele Maestrini, Pierluigi Di Lizia   +2 more
openaire   +1 more source

Comment vivre avec des conflits d’usages au sein d’un espace naturel protégé exposé à des risques littoraux ?

VertigO, 2020
This article proposes an analysis of the production of land-use conflicts between interested party in the management of a coastal area exposed to coastal risks along the North Sea coast, in the Hauts de France Region.
Caroline Rufin-Soler, Marie-Hélène Ruz, Philippe Deboudt, Rachel Révillon   +3 more
doaj   +1 more source

Object-centric Reconstruction and Tracking of Dynamic Unknown Objects Using 3D Gaussian Splatting [PDF]

peer reviewedGeneralizable perception is one of the pillars of high-level autonomy in space robotics. Estimating the structure and motion of unknown objects in dynamic environments is fundamental for such autonomous systems.
DENTLER, Jan Eric, BARAD, Kuldeep Rambhai, RICHARD, Antoine, OLIVARES MENDEZ, Miguel Angel, MARTINEZ LUNA, Carol, Dentler, Jan, Barad, Kuldeep R, Martinez, Carol, Olivares-Mendez, Miguel   +8 more
core   +2 more sources

STAR: Spatial and Temporal Context-Aware Network for Resident Space Object Detection

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Most resident space object (RSO) detection methods are designed based on the observation mode of the telescope, focusing the core of RSO detection on point-like or streak-like object detection.
Bowen Gan, Wei Liang, Zhaodong Niu
doaj   +1 more source

Prediction and Image Formation for Serendipitous Resident Space Object Underflights of Landsat 8

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Non-Earth imaging (NEI) of resident space objects (RSO) has become more readily available recently due to an expanding commercial sector focusing specifically on the NEI task, as well as high spatial resolution Earth imaging systems being agile enough to
Michael G. Gartley
doaj   +1 more source

Investigating transcription factor dynamics in health and disease using FRAP

FEBS Letters, EarlyView.
FRAP analysis of GFP‐tagged transcription factors reveals how molecular mobility and target engagement change in response to drug treatment. By combining live‐cell imaging, quantitative model fitting, and statistical analysis, this approach uncovers transcription factor dynamics linked to disease mechanisms, providing a powerful framework for ...
Kannan Govindaraj, Carolina Vazquez Garzon, Jose Joaquin Velasco, Janine N. Post   +3 more
wiley   +1 more source