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Related papers: Stacking of SKA data: comparing uv-plane and image…

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The Square Kilometre Array (SKA) will form the largest radio telescope ever built and such a huge instrument in the desert poses enormous engineering and logistic challenges. Algorithmic and architectural breakthroughs are needed. Data is…

Instrumentation and Methods for Astrophysics · Physics 2014-11-17 Orhan Ocal , Paul Hurley , Giovanni Cherubini , Sanaz Kazemi

Radio interferometer arrays with non-homogeneous element patterns are more difficult to calibrate compared to the more common homogeneous array. In particular, the non-homogeneity of the patterns has significant implications on the…

Instrumentation and Methods for Astrophysics · Physics 2021-05-26 Jake L. Jones , Randall B. Wayth

Optical aerial images change detection is an important task in earth observation and has been extensively investigated in the past few decades. Generally, the supervised change detection methods with superior performance require a large…

Computer Vision and Pattern Recognition · Computer Science 2020-10-23 Yuan Zhou , Xiangrui Li

With the next generation of interferometric telescopes, such as the Square Kilometre Array (SKA), the need for highly computationally efficient reconstruction techniques is particularly acute. The challenge in designing learned, data-driven…

Instrumentation and Methods for Astrophysics · Physics 2025-06-17 Matthijs Mars , Marta M. Betcke , Jason D. McEwen

The study of the Universe on ultra-large scales is one of the major science cases for the Square Kilometre Array (SKA). The SKA will be able to probe a vast volume of the cosmos, thus representing a unique instrument, amongst…

Cosmology and Nongalactic Astrophysics · Physics 2022-09-21 S. Camera , A. Raccanelli , P. Bull , D. Bertacca , X. Chen , P. G. Ferreira , M. Kunz , R. Maartens , Y. Mao , M. G. Santos , P. R. Shapiro , M. Viel , Y. Xu

Scattering obscures information carried by wave by producing a speckle pattern, posing a common challenge across various fields, including microscopy and astronomy. Traditional methods for extracting information from speckles often rely on…

Scientists across all disciplines increasingly rely on machine learning algorithms to analyse and sort datasets of ever increasing volume and complexity. Although trends and outliers are easily extracted, careful and close inspection will…

Instrumentation and Methods for Astrophysics · Physics 2021-09-16 T. H. Jarrett , A. Comrie , L. Marchetti , A. Sivitilli , S. Macfarlane , F. Vitello , U. Becciani , A. R. Taylor , J. M. van der Hulst , P. Serra , N. Katz , M. Cluver

Stacking is an important process within logistics. Some notable examples of items to be stacked are steel bars or steel plates in a steel yard or containers in a container terminal or on a ship. We say that two items are conflicting if…

Data Structures and Algorithms · Computer Science 2021-06-07 Martin Olsen

We study the problem of robotic stacking with objects of complex geometry. We propose a challenging and diverse set of such objects that was carefully designed to require strategies beyond a simple "pick-and-place" solution. Our method is a…

The SKA will be capable of producing a stream of science data products that are Exa-scale in terms of their storage and processing requirements. This Google-scale enterprise is attracting considerable international interest and excitement…

Instrumentation and Methods for Astrophysics · Physics 2015-01-23 Peter Quinn , Tim Axelrod , Ian Bird , Richard Dodson , Alex Szalay , Andreas Wicenec

The generation of a sky model for calibration of Square Kilometre Array observations requires a fast method of automatic point source detection and characterisation. In recent years, point source detection in two-dimensional images has been…

Instrumentation and Methods for Astrophysics · Physics 2016-11-02 Siamak Dehghan , Melanie Johnston-Hollitt , Christopher Hollitt

The Square Kilometre Array (SKA), when it becomes functional, is expected to enrich neutron star (NS) catalogues by at least an order of magnitude over their current state. This includes the discovery of new NS objects leading to better…

Instrumentation and Methods for Astrophysics · Physics 2017-01-18 Mihir Arjunwadkar , Akanksha Kashikar , Manjari Bagchi

Obstacle detection plays an important role in unmanned surface vehicles (USV). The USVs operate in highly diverse environments in which an obstacle may be a floating piece of wood, a scuba diver, a pier, or a part of a shoreline, which…

Computer Vision and Pattern Recognition · Computer Science 2015-03-09 Matej Kristan , Vildana Sulic , Stanislav Kovacic , Janez Pers

This paper presents a real-time control system for surface inspection using multiple unmanned aerial vehicles (UAVs). The UAVs are coordinated in a specific formation to collect data of the inspecting objects. The communication platform for…

Robotics · Computer Science 2019-07-09 Van Truong Hoang , Manh Duong Phung , Tran Hiep Dinh , Quang P. Ha

Stacking is a widely used model averaging technique that asymptotically yields optimal predictions among linear averages. We show that stacking is most effective when model predictive performance is heterogeneous in inputs, and we can…

Methodology · Statistics 2021-10-29 Yuling Yao , Gregor Pirš , Aki Vehtari , Andrew Gelman

In this work, we propose a special cascade network for image segmentation, which is based on the U-Net networks as building blocks and the idea of the iterative refinement. The model was mainly applied to achieve higher recognition quality…

Computer Vision and Pattern Recognition · Computer Science 2018-11-22 Artem Sevastopolsky , Stepan Drapak , Konstantin Kiselev , Blake M. Snyder , Jeremy D. Keenan , Anastasia Georgievskaya

With ever increasing data rates produced by modern radio telescopes like LOFAR and future telescopes like the SKA, many data processing steps are overwhelmed by the amount of data that needs to be handled using limited compute resources.…

Instrumentation and Methods for Astrophysics · Physics 2020-03-18 Sarod Yatawatta

The possibility of using the SKA for occasional support of scientific space missions should be considered, along with all other science goals, in the design of the array. The benefits of higher data rates from distant spacecraft during high…

Astrophysics · Physics 2009-11-10 D. L. Jones

Radio-astronomy is about to embark on a new way of doing science. The revolution that is about to take place is not due to the enormous sensitivity of the Square Kilometre Array, which is still a decade away, but due to its pathfinders,…

Instrumentation and Methods for Astrophysics · Physics 2015-05-20 Ray P. Norris