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In order to directly study the role of magnetic fields in the immediate vicinity of protostars, we use Very-Long-Baseline Interferometry (VLBI), aiming at the detection of non-thermal centimetric radio emission. This is technically the only…

Astrophysics · Physics 2009-11-13 Jan Forbrich , Maria Massi , Eduardo Ros , Andreas Brunthaler , Karl Menten

ixpeobssim is a simulation and analysis framework, based on the Python programming language and the associated scientific ecosystem, specifically developed for the Imaging X-ray Polarimetry Explorer (IXPE). Given a source model and the…

Instrumentation and Methods for Astrophysics · Physics 2022-09-23 L. Baldini , N. Bucciantini , N. Di Lalla , S. R. Ehlert , A. Manfreda , M. Negro , N. Omodei , M. Pesce-Rollins , C. Sgrò , S. Silvestri

This paper introduces LLMServingSim2.0, a system simulator designed for exploring heterogeneous hardware in large-scale LLM serving systems. LLMServingSim2.0 addresses two key limitations of its predecessor: (1) integrating hardware models…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-11-11 Jaehong Cho , Hyunmin Choi , Jongse Park

Radio-loud active galactic nuclei (AGNs), hosting powerful relativistic jet outflows, provide an excellent laboratory for studying jet physics. Very long baseline interferometry (VLBI) enables high-resolution imaging on milli-arcsecond…

High Energy Astrophysical Phenomena · Physics 2018-02-07 X. -P. Cheng , T. An , X. -Y. Hong , J. Yang , P. Mohan , K. I. Kellermann , M. L. Lister , S. Frey , W. Zhao , Z. -L. Zhang , X. -C. Wu , X. -F. Li , Y. -K. Zhang

Accurate pose estimation is fundamental for unmanned aerial vehicle (UAV) applications, where Visual-Inertial SLAM (VI-SLAM) provides a cost-effective solution for localization and mapping. However, existing VI-SLAM methods mainly rely on…

Robotics · Computer Science 2026-04-02 Yiyang Wu , Xiaohu Zhang , Yanjin Du , Tongsu Zhang , Chujun Li , Siyang Chen , Guoyi Zhang , Xiangpeng Xu

We present the optical and cryo-mechanical solutions for the Spectrograph of VSI (VLTI Spectro-Imager), the second generation near-infrared (J, H and K bands) interferometric instrument for the VLTI. The peculiarity of this spectrograph is…

Astrophysics · Physics 2009-11-13 D. Lorenzetti , G. Li Causi , R. Speziali , F. Vitali , D. Loreggia , C. Baffa , P. Kern , L. Jocou , F. Malbet , P. Rabou

When VLBI observations are used to determine the position or motion of a radio source relative to reference sources nearby on the sky, the astrometric information is usually obtained via: (i) phase-referenced maps; or (ii) parametric model…

Instrumentation and Methods for Astrophysics · Physics 2019-08-13 D. E. Lebach , N. Bartel , M. F. Bietenholz , R. M. Campbell , D. Gordon , J. I. Lederman , J. -F. Lestrade , R. R. Ransom , M. I. Ratner , I. I. Shapiro

In order to measure the Universal Time (UT1) in real time, National Time Service Center (NTSC) has built a VGOS-like (VLBI Global Observing System) broadband VLBI network, which includes three 13-m radio telescopes located in Jilin, Sanya…

Instrumentation and Methods for Astrophysics · Physics 2023-02-21 Dang Yao , Yuan-Wei Wu , Bo Zhang , Jing Sun , Yan Sun , Shuang-Jing Xu , Jia Liu , Lang-Ming Ma , Jian-Jun Gong , Ying Yang , Xu-Hai Yang

This paper presents the fourth extension to the Very Long Baseline Array (VLBA) Calibrator Survey, containing 258 new sources not previously observed with very long baseline interferometry (VLBI). This survey, based on three 24 hour VLBA…

Astrophysics · Physics 2008-11-26 L. Petrov , Y. Y. Kovalev , E. Fomalont , D. Gordon

LabVIEW enables engineers to simulate various communication and control systems. LabVIEW helps to create Virtual Instruments (VIs) which are the files with which the user interacts to accomplish the required task. In this paper, the AM…

Human-Computer Interaction · Computer Science 2023-08-03 Samir R Katte

We have carried out full imaging simulation studies to explore the impact of frequency standards in millimeter and sub-millimeter Very Long Baseline Interferometry (VLBI), focusing on the coherence time and sensitivity. In particular, we…

Instrumentation and Methods for Astrophysics · Physics 2015-06-11 M. Rioja , R. Dodson , Y. Asaki , J. Hartnett , S. Tingay

The Interplanetary Network (IPN) emerges as the backbone for communication between various spacecraft and satellites orbiting distant celestial bodies. This paper introduces the Interplanetary Network Visualizer (IPN-V), a software platform…

Networking and Internet Architecture · Computer Science 2024-09-10 Alice Le Bihan , Juan A. Fraire , Pierre Francois , Felix Flentge

UVSiPM is a light detector designed to measure the intensity of electromagnetic radiation in the 320-900 nm wavelength range. It has been developed in the framework of the ASTRI project whose main goal is the design and construction of an…

The "Space VLBI 2020: Science and Technology Futures" meeting was the second in The Future of High-Resolution Radio Interferometry in Space series. The first meeting (2018 September 5--6; Noordwijk, the Netherlands) focused on the full…

Resistive crossbars have attracted significant interest in the design of Deep Neural Network (DNN) accelerators due to their ability to natively execute massively parallel vector-matrix multiplications within dense memory arrays. However,…

Machine Learning · Computer Science 2021-01-11 Sourjya Roy , Shrihari Sridharan , Shubham Jain , Anand Raghunathan

Prediction and nullifying the interference is a challenging problem in vehicle to infrastructure scenarios . The implementation of practical V2I network is limited because of inevitability of interference due to random nature of the…

Signal Processing · Electrical Eng. & Systems 2021-02-18 Prateek Bhadauria , Ravi Kumar , Sanjay Sharma

Electronic circuit behavioral models built with hardware description/modeling languages such as Verilog-AMS for system-level simulations are typically functional models. They do not capture the physical design (layout) information of the…

Hardware Architecture · Computer Science 2019-05-31 Saraju P. Mohanty , Elias Kougianos

Scientific applications produce a huge amount of data, which imposes serious management and analysis challenges. In particular, limitations in current database management systems prevent their adoption in simulation applications, in which…

Databases · Computer Science 2019-03-18 Hermano Lustosa , Fabio Porto

A review of the literature reveals that while parallel computing is sometimes employed by astronomers for custom, large-scale calculations, no package fosters the routine application of parallel methods to standard problems in astronomical…

Astrophysics · Physics 2007-05-23 M. S. Noble , J. C. Houck , J. E. Davis , A. Young , M. Nowak

MIRI, the Mid-InfraRed Instrument, is one of four instruments being built for the James Webb Space Telescope, and is developed jointly between an EuropeanConsortium and the US. In this paper we present a software data simulator for one of…

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